Electronic device and method for supporting switching of wireless charging path

Abstract

The present disclosure provides an electronic device for supporting switching of a charging path. The electronic device may: identify the occurrence of a designated event while a battery is being charged through one charging path of a first charging path including a wireless power reception circuit and a first charging circuit or a second charging path including the wireless power reception circuit and a second charging circuit; and switch the charging path to the other charging path of the first charging path and the second charging path at least in part on the basis of the identification. The switching operation may comprise an operation of changing the setting of at least one of a first capacitor or a second capacitor such that the maximum voltage of the wireless power reception circuit is lower than before the switching operation.

Description

Electronic device and method supporting switching of wireless charging paths

[0001] The present disclosure relates to an electronic device and method that supports switching of a wireless charging path.

[0002] Wireless charging technology is widely used to charge batteries in various electronic devices. Wireless charging systems transfer power between a transmitter and a receiver, enabling electronic devices to charge their batteries without a wired connection.

[0003] Wireless power transmission methods include magnetic induction, magnetic resonance, or electromagnetic waves. Magnetic induction or magnetic resonance methods can be advantageous for charging electronic devices located relatively close to the wireless power transmitter. Electromagnetic wave methods may be more advantageous than magnetic induction or magnetic resonance methods for long-distance power transmission reaching several meters. Electromagnetic wave methods are primarily used for long-distance power transmission and can deliver power most efficiently by accurately determining the location of a power receiver at a distance.

[0004] In addition, the wireless power receiving device and wireless power transmission can support at least one charging method among magnetic induction, magnetic resonance, and electromagnetic wave methods. To charge wireless power receiving devices of various charging methods, the wireless power transmitting device can support multiple charging methods.

[0005] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0006] According to one embodiment, an electronic device may be provided. The electronic device may include a wired charging terminal configured to be wiredly connected to a first external power transmission circuit. The electronic device may include a wireless power receiving circuit connected to a charging coil configured to be wirelessly connected to a second external power transmission circuit. The wireless power receiving circuit may optionally be connected to a first capacitor and a second capacitor. The electronic device may include one or more electronic components including a processor and a battery. The electronic device may include a first charging circuit electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to distribute power received through the wired charging terminal or the wireless power receiving circuit to the battery and the one or more electronic components. The electronic device may include a second charging circuit electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to transfer power received through the wired charging terminal or the wireless power receiving circuit to the battery. The electronic device may include a processor. The processor can detect the occurrence of a specified event while the battery is being charged through a charging path, which is either a first charging path including the wireless power receiving circuit and the first charging circuit or a second charging path including the wireless power receiving circuit and the second charging circuit. Based at least in part on the detecting operation, the processor can switch the charging path to another charging path among the first charging path and the second charging path. The switching operation may include an operation to change the setting of at least one capacitor among the first capacitor or the second capacitor so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation.

[0007] According to one embodiment, a method of operation of an electronic device may be provided. The method of operation of the electronic device may include at least one operation. The at least one operation may include an operation of confirming the occurrence of a specified event while the battery is being charged through a charging path, which is one of a first charging path including the wireless power receiving circuit and the first charging circuit or a second charging path including the wireless power receiving circuit and the second charging circuit. The at least one operation may include an operation of switching the charging path to another charging path among the first charging path and the second charging path, based at least partially on the confirming operation. The switching operation may include an operation of changing the setting of at least one capacitor among the first capacitor or the second capacitor so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation.

[0008] According to one embodiment, a storage medium may be provided for storing at least one instruction readable by a computer. The at least one instruction may cause the electronic device to perform at least one operation when executed by at least part of at least one processor of the electronic device. The at least one operation may include an operation of confirming the occurrence of a specified event while the battery is being charged through a charging path, which is one of a first charging path including the wireless power receiving circuit and the first charging circuit or a second charging path including the wireless power receiving circuit and the second charging circuit. The at least one operation may include an operation of switching the charging path to another charging path among the first charging path and the second charging path, based at least part of the confirming operation. The switching operation may include an operation of changing the setting of at least one capacitor, which is the first capacitor or the second capacitor, so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation.

[0009] In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0010] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure.

[0011] FIG. 2 illustrates a block diagram of a wireless power transmitting device and a wireless power receiving device according to one embodiment of the present disclosure.

[0012] FIG. 3 is a schematic block diagram of a wireless power system according to one embodiment of the present disclosure.

[0013] FIG. 4a is a diagram showing the configuration of an electronic device that receives power wirelessly, according to one embodiment of the present disclosure.

[0014] Figure 4b is a diagram showing the first charging path of the electronic device of Figure 4a.

[0015] FIG. 4c is a diagram showing the second charging path of the electronic device of FIG. 4a.

[0016] FIGS. 5 to 7 are drawings showing the configuration of a power receiving circuit according to one embodiment of the present disclosure.

[0017] FIG. 8 is a flowchart illustrating the operation of an electronic device switching a charging path according to one embodiment of the present disclosure.

[0018] FIG. 9 is a flowchart illustrating the operation of an electronic device switching a charging path from a first charging path to a second charging circuit according to one embodiment of the present disclosure.

[0019] FIG. 10 is a flowchart illustrating the operation of an electronic device switching a charging path from a second charging path to a first charging circuit according to one embodiment of the present disclosure.

[0020] FIG. 11 is a drawing illustrating a change in modulation depth according to a load, according to one embodiment of the present disclosure.

[0021] FIG. 12 is a diagram showing the rectified voltage and battery output voltage during the switching operation of the charging circuit in a state where at least one switching setting is not applied, according to one embodiment of the present disclosure.

[0022] FIG. 13 is a diagram showing a rectified voltage and a battery output voltage while a switching operation of a charging circuit is performed in a state where at least one switching setting is applied, according to one embodiment of the present disclosure.

[0023] FIG. 14 is a block diagram of a power circuit and a battery of an electronic device for receiving power outside the electronic device and / or transmitting power outside the electronic device, according to one embodiment of the present disclosure.

[0024] Hereinafter, embodiments of the present disclosure are described in detail with reference to the drawings so that those skilled in the art can easily practice them. However, the present disclosure may be embodied in various different forms and is not limited to the embodiments described herein. In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components. Furthermore, in the drawings and related descriptions, descriptions of well-known functions and configurations may be omitted for clarity and brevity.

[0025] FIG. 1 is a block diagram of an electronic device in a network environment according to various embodiments of the present disclosure.

[0026] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0027] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0028] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence is performed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0029] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0030] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0031] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0032] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0033] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0034] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0035] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0036] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0037] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0038] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0039] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0040] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0041] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0042] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a communication module (192) (e.g., cellular communication module, short-range communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0043] The communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for eMBB realization, loss coverage (e.g., 164 dB or less) for mMTC realization, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for URLLC realization.

[0044] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0045] According to various embodiments, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0046] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface) and exchange signals (e.g., commands or data) with each other.

[0047] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In one embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0048] According to one embodiment of the present disclosure, a wireless power transmitting device (or wireless power transmitter) or a wireless power receiving device (or wireless power receiver) may include at least one of, for example, a smartphone, a tablet PC, a mobile phone, a video phone, an e-book reader, a desktop PC, a laptop PC, a netbook computer, a workstation, a server, a PDA, a PMP (portable multimedia player), an MP3 player, a medical device, a camera, or a wearable device. The wearable device may include at least one of an accessory type (e.g., a watch, a ring, a bracelet, an anklet, a necklace, glasses, a contact lens, or a head-mounted device (HMD)), a fabric or clothing integrated type (e.g., electronic clothing), a body-attached type (e.g., a skin pad or a tattoo), or a bio-implantable circuit.

[0049] According to one embodiment, a wireless power transmission device or electronic device may include at least one of, for example, a television, a set-top box connected to the television via wired or wireless connection, a DVD (digital video disk) player, audio, a refrigerator, an air conditioner, a vacuum cleaner, an oven, a microwave oven, a washing machine, an air purifier, a set-top box, a home automation control panel, a security control panel, a media box, a game console, an electronic dictionary, an electronic key, a camcorder, an electric vehicle, or an electronic photo frame.

[0050] According to one embodiment, a wireless power transmitting device (or wireless power transmitter) or a wireless power receiving device (or wireless power receiver) is various medical devices (e.g., various portable medical measuring devices (blood glucose meters, heart rate monitors, blood pressure monitors, or body temperature monitors, etc.), MRA (magnetic resonance angiography), MRI (magnetic resonance imaging), CT (computed tomography), imaging devices, or ultrasound devices, etc.), navigation devices, satellite navigation systems (GNSS (global navigation satellite system)), EDR (event data recorder), FDR (flight data recorder), automotive infotainment devices, marine electronic equipment (e.g., marine navigation devices, gyrocompasses, etc.), avionics, security devices, vehicle head units, industrial or domestic robots, drones, ATMs of financial institutions, POS (point of sales) of stores, or Internet of Things devices (e.g., light bulbs, various sensors, sprinkler systems, fire alarms, thermostats, streetlights, toasters, exercise equipment, hot water tanks, It may include at least one of a heater, a boiler, etc.

[0051] According to one embodiment, the wireless power transmitting device or electronic device may include at least one of furniture, a part of a building / structure or vehicle, an electronic board, an electronic signature receiving device, a projector, or various measuring instruments (e.g., water, electricity, gas, or radio wave measuring instruments, etc.).

[0052] According to one embodiment, the wireless power transmitting device or the wireless power receiving device may be flexible or a combination of two or more of the various devices described above.

[0053] The wireless power transmitting device or electronic device according to the embodiments of the present disclosure is not limited to the devices described above. In the present disclosure, the term "user" may refer to a person using the electronic device or a device using the wireless power transmitting device or wireless power receiving device (e.g., an artificial intelligence electronic device).

[0054] In a wireless charging operation according to one embodiment of the present disclosure, the wireless power receiving device may change the wireless charging path or charging circuit depending on various charging conditions or situations. For example, the charging circuit may be switched to maximize charging efficiency or to select an optimal charging path based on the battery state. However, when changing the wireless charging path or charging circuit, a problem of power overshooting in the wireless power receiving circuit may occur. This is because the voltage within the wireless power receiving circuit may rise rapidly due to voltage fluctuations occurring when switching the charging circuit, potentially damaging the circuit. Therefore, a method is required to effectively control the voltage overshooting problem that occurs when changing the wireless charging path and to ensure a stable charging process.

[0055] FIG. 2 illustrates a block diagram of a wireless power transmitting device and a wireless power receiving device according to one embodiment of the present disclosure.

[0056] Referring to FIG. 2, a wireless power transmitting device (200) according to various embodiments can wirelessly transmit power (P) to at least one wireless power receiving device (300). The wireless power transmitting device (200) can transmit power (P) to the wireless power receiving device (300) according to various charging methods. For example, the wireless power transmitting device (200) can transmit power (P) according to an inductive method. In the case of an inductive method, the wireless power transmitting device (200) may include, for example, a power source, a DC-AC conversion circuit, an amplifier circuit, an impedance matching circuit, at least one capacitor, at least one coil, and / or a communication modulation / demodulation circuit. At least one capacitor may form a resonant circuit together with at least one coil. For example, the wireless power transmitting device (200) may be implemented in a manner defined in the WPC (wireless power consortium) standard (or Qi standard). For example, a wireless power transmission device (200) may transmit power (P) according to a resonant method. In the case of a resonant method, the wireless power transmission device (200) may include, for example, a power source, a DC-AC conversion circuit, an amplifier circuit, an impedance matching circuit, at least one capacitor, at least one coil, and / or an out-of-band (OOB) communication circuit (e.g., a BLE (Bluetooth Low Energy) communication circuit). At least one capacitor and at least one coil may form a resonant circuit. For example, the wireless power transmission device (200) may be implemented in a manner defined in the A4WP (Alliance for Wireless Power) standard (or the AFA (Air Fuel Alliance) standard). The wireless power transmission device (200) may include a coil capable of generating an induced magnetic field when current flows according to a resonant method or an induction method.The operation of the wireless power transmitting device (200) generating an induced magnetic field can be described as the wireless power transmitting device (200) wirelessly transmitting power (P). Additionally, the wireless power receiving device (300) may include a coil in which an induced electromotive force is generated by a magnetic field formed in the surroundings that changes in magnitude over time. The operation of the wireless power receiving device (300) generating an induced electromotive force through the coil can be described as the wireless power receiving device (300) wirelessly receiving power (P). The wireless power transmitting device (200) may be implemented in a manner defined in the airfuel inductive (e.g., PMA (Power Matters Alliance)), airfuel resonant (e.g., resonance) standard, or in a manner defined in the Qi standard as a standard for wireless power transmission. For example, the wireless power transmitting device (200) may transmit power (P) according to an electromagnetic wave method. In the case where the wireless power transmission device (200) is based on an electromagnetic wave method, the wireless power transmission device (200) may include, for example, a power source, a DC-AC conversion circuit, an amplifier circuit, a distribution circuit, a phase shifter, a power transmission antenna array including a plurality of patch antennas, and / or an out-of-band communication circuit (e.g., a BLE communication module). Each of the plurality of patch antennas may form a radio frequency (RF) wave. The wireless power receiving device (300) may include a patch antenna capable of outputting current using an RF wave formed in the surroundings. The operation of the wireless power transmission device (200) forming an RF wave can be expressed as the wireless power transmission device (200) wirelessly transmitting power (P). The operation of the wireless power receiving device (300) outputting current from a patch antenna using an RF wave can be expressed as the wireless power receiving device (300) wirelessly receiving power (P).

[0057] According to one embodiment, a wireless power transmitting device (200) can communicate with a wireless power receiving device (300). For example, the wireless power transmitting device (200) can communicate with the wireless power receiving device (300) according to an in-band (IB) method. The wireless power transmitting device (200) or the wireless power receiving device (350) can change the load (or impedance) of the data to be transmitted, for example, according to an on / off keying modulation method. For example, modulation can be performed according to an FSK (frequency shift keying) modulation method and / or an ASK (amplitude shift keying) modulation method. The wireless power transmitting device (200) or the wireless power receiving device (300) can determine the data transmitted by the other device by measuring the load change (or impedance change) based on a change in the magnitude (e.g., frequency and / or amplitude) of the coil's current, voltage, or power. For example, an operation of performing modulation based on an ASK modulation scheme and / or an FSK modulation scheme can be understood as an operation of transmitting data according to an in-band communication method. An operation of determining data transmitted by a counterpart device by performing demodulation based on a change in the magnitude (frequency and / or amplitude) of the coil's current, voltage, or power can be understood as an operation of receiving data according to an in-band communication method. For example, a wireless power transmitting device (200) can communicate with a wireless power receiving device (300) according to an out-of-band (OOB) method. The wireless power transmitting device (200) or the wireless power receiving device (300) can transmit and receive data using a communication circuit (e.g., a BLE communication module) provided separately from the coil or patch antenna.The wireless power transmission device (200) may transmit media data, and depending on the implementation, each of a plurality of different communication circuits (e.g., BLE communication module, Wi-Fi module, or Wi-Gig module) may transmit and receive media data and wireless power transmission and reception control signals, respectively.

[0058] According to one embodiment, the wireless power transmitting device (200) or the wireless power receiving device (300) performing a specific operation may mean that various hardware included in the wireless power transmitting device (200) or the wireless power receiving device (300), such as a control circuit like a processor (e.g., a transmission IC and / or an MCU (micro controlling unit)), or a coil, performs a specific operation. Alternatively, the wireless power transmitting device (200) or the wireless power receiving device (300) performing a specific operation may mean that the processor controls other hardware to perform a specific operation. Alternatively, the wireless power transmitting device (200) or the wireless power receiving device (300) performing a specific operation may mean that the processor or other hardware is caused to perform a specific operation as at least one instruction for performing a specific operation, which was stored in a storage circuit (e.g., memory) of the wireless power transmitting device (200) or the wireless power receiving device (300), is executed.

[0059] FIG. 3 is a schematic block diagram of a wireless power system according to one embodiment of the present disclosure.

[0060] Referring to FIG. 3, the wireless power system may include a wireless power transmitting device (200) that transmits wireless power (e.g., the electronic device (100) of FIG. 1) and a wireless power receiving device (300) (e.g., the electronic device (100) of FIG. 1).

[0061] According to one embodiment, a wireless power transmission device (200) may include a processor (210), a memory (220), a power source (230), a power transmission circuit (240), and / or a communication circuit (250). In the present disclosure, the power transmission circuit (240) may be referred to as a wireless power transmission circuit.

[0062] According to one embodiment, a wireless power receiving device (300) may include a processor (310), a memory (320), a power receiving circuit (330), a power management integrated circuit (PMIC) (340), a load (350), and / or a communication circuit (360). In the present disclosure, the power receiving circuit (330) may be referred to as a wireless power receiving circuit.

[0063] According to one embodiment, the power transmission circuit (240) can transmit power (P) wirelessly according to at least one of an inductive method, a resonant method, or an electromagnetic wave method, as a power receiving circuit (330).

[0064] According to one embodiment, the power transmission circuit (240) may include a power generation circuit, a coil, and / or a matching circuit. The power transmission circuit (240) may receive power from a power source (power adapter) (230) and provide it to the power generation circuit. The power generation circuit may generate an AC signal using the received DC power. The power adapter (230) may supply power to a load (e.g., processor, power transmission circuit, etc.) based on power supplied from, for example, a charger (e.g., TA, travel adapter). The power adapter (230) may include a converter circuit. For example, the power source (230) may include a DC / DC converter circuit such as a buck, buck-boost, or boost circuit. According to one embodiment, the power adapter (230) may include a rectifier when the external input power is AC. The power generation circuit may convert the received power into, for example, an AC waveform, or amplify it and deliver it to the coil. When power is applied to the coil, an induced magnetic field whose magnitude changes over time may be formed from the coil, and accordingly, power may be transmitted wirelessly. The power transmission circuit (240) may further include capacitors that form a resonant circuit together with the coil. The resonant frequency may be defined according to a standard and may have a frequency in the band of about 100 to about 300 kHz according to the Qi standard based on induction, and may have about 6.78 MHz according to the AFA standard based on resonance. The matching circuit may cause the power transmission circuit (240) and the power receiving circuit (330) to be impedance-matched with each other by changing at least one of the capacitance or reactance of the circuit connected to the coil according to the control of the processor (210).

[0065] According to one embodiment, the processor (210) performs overall control of the wireless power transmission device (200) and can generate various messages (e.g., instructions) required for wireless power transmission and transmit them to the communication circuit (250). The processor (210) can calculate the power (or amount of power) to be transmitted to the wireless power receiving device (300) based on information received from the communication circuit (250). The processor (210) can control the power transmission circuit (240) so that the power (P) generated by the coil included in the power transmission circuit (240) is transmitted to the wireless power receiving device (300). For example, the processor (210) can control the magnitude of the power transmitted by the power transmission circuit (240). For example, the processor (210) can control the magnitude of power output from the power source (230) or control the magnitude of power transmitted by the power transmission circuit (240) by controlling the amplification gain of the power amplifier included in the power transmission circuit (240). The processor (210) can adjust the magnitude of power output from the power source (230) by controlling the duty cycle or frequency of the power output from the power source (230). The processor (210) can control the magnitude of power applied to the power transmission circuit (240) by controlling the magnitude of the bias voltage of the power amplifier. The processor (210) can be implemented as various processing circuits capable of performing operations, such as a general-purpose processor like a CPU, a minicomputer, a microprocessor, a microcontrolling unit (MCU), or a field programmable gate array (FPGA), and there is no limitation on the type. The processor (210) can control at least one of the power source (230) or the power transmission circuit (240) to transmit power of a determined amount, for example.

[0066] According to one embodiment, the communication circuit (250) may include a plurality of communication circuits (e.g., a first communication circuit, or a second communication circuit). For example, the first communication circuit may communicate with the wireless power receiving device (300) based on an in-band communication method using a frequency that is the same as or adjacent to the frequency used for power transmission in the coil, and the second communication circuit may communicate with the wireless power receiving device (300) based on an out-of-band communication method using a frequency different from the frequency used for power transmission in the coil.

[0067] According to one embodiment, the memory (220) can be implemented in various forms such as ROM (read only memory), RAM (random access memory), or flash memory, and there are no limitations on the form of implementation.

[0068] According to one embodiment, the power receiving circuit (330) can receive power (P) wirelessly from the power transmitting circuit (240) according to at least one of an inductive method, a resonant method, or an electromagnetic wave method. The power receiving circuit (330) can perform power processing such as rectifying the received AC waveform power into a DC waveform, converting the voltage, or regulating the power.

[0069] According to one embodiment, the power receiving circuit (330) may include a coil, a rectifier circuit, a converting circuit, and / or a matching circuit. An induced electromotive force may be generated in the coil of the power receiving circuit (330) by a magnetic field formed around it that changes in magnitude over time, and accordingly, the power receiving circuit (330) may receive power (P) wirelessly. The rectifier circuit may rectify the power of the received alternating current waveform. The converting circuit may adjust the voltage of the rectified power and transmit it to the PMIC (340). The power receiving circuit (330) may further include a regulator, or the converting circuit may be replaced by the regulator. The matching circuit may cause the power transmitting circuit (240) and the power receiving circuit (330) to be impedance-matched with each other by changing at least one of the capacitance or reactance of the circuit connected to the coil under the control of the processor (310).

[0070] According to one embodiment, the PMIC (340) can process the received and processed power to suit the hardware (e.g., load (350)) and deliver it to each hardware. For example, the PMIC (340) may include a voltage divider circuit, a first charging circuit, and / or a second charging circuit.

[0071] According to one embodiment, the load (350) may include, for example, a battery that stores power received from a wireless power transmission device (200), and may include various hardware that consumes power (e.g., a processor).

[0072] According to one embodiment, the processor (310) can control the overall operation of the wireless power receiving device (300) and can generate various messages necessary for wireless power reception and transmit them to the communication circuit (360).

[0073] According to one embodiment, the memory (320) can store instructions for performing operations of the wireless power receiving device (300). The memory (320) can be implemented in various forms such as ROM (read only memory), RAM (random access memory), or flash memory, and there are no limitations on the form of implementation.

[0074] According to one embodiment, the wireless power transmitting device (200) and / or the wireless power receiving device (300) may include a sensing circuit. For example, the sensing circuit may use a magnetic field sensor to detect whether it is coupled with another electronic device (e.g., the wireless power transmitting device (200) and / or the wireless power receiving device (300)), and may use a current (or voltage) sensor to detect the state of an output signal, e.g., a current level, a voltage level, and / or a power level. Additionally, the sensing circuit may be a circuit for detecting foreign objects (e.g., foreign object detection (FOD)).

[0075] FIG. 4a is a diagram showing the configuration of an electronic device that receives power wirelessly, according to one embodiment of the present disclosure.

[0076] Figure 4b is a diagram showing the first charging path of the electronic device of Figure 4a.

[0077] FIG. 4c is a diagram showing the second charging path of the electronic device of FIG. 4a.

[0078] Referring to FIGS. 4a through 4c, a wireless power receiving device (hereinafter, electronic device) (300) may include a wireless power receiving circuit (330) (e.g., power receiving circuit (330) of FIG. 2), an over-voltage protection (OVP) circuit (410), a first charging circuit (421), a second charging circuit (422), and / or a battery (350) (e.g., load (350) of FIG. 2). According to one embodiment, the OVP circuit (410), the first charging circuit (421), and / or the second charging circuit (422) may be included in a PMIC (e.g., PMIC (340) of FIG. 3). In the present disclosure, the wireless power receiving circuit (330) may be abbreviated as power receiving circuit (330).

[0079] According to one embodiment, the electronic device (300) can charge the battery (350) according to two charging modes using a first charging circuit (421) and a second charging circuit (422). The two charging modes may be charging modes capable of receiving different powers, for example. For example, the first charging mode may be a mode that performs relatively low-power charging, and the second charging mode may be a mode that performs relatively high-power charging compared to the first charging mode. According to one embodiment, the first charging mode may be a mode that operates as a buck, buck-boost, or boost converter, and the second charging mode may be a charging mode that operates as a switched-capacitor voltage divider.

[0080] According to one embodiment, the electronic device (300) can receive power wirelessly from the wireless power transmission device (200) through a power receiving circuit (330). Additionally, the electronic device (300) can receive power wired from the external power source (201) (e.g., TA) through a wired charging terminal (401) that is wired to the power transmission circuit included in the external power source (201). The wired charging terminal (401) may include, for example, a USB (universal serial bus) terminal (e.g., a USB Type-C terminal), a micro USB terminal, or a dedicated charging terminal, but is not limited thereto. In the present disclosure, the power transmission circuit included in the external power source (201) may be referred to as the first external power transmission circuit.

[0081] According to one embodiment, the power receiving circuit (330) can receive power wirelessly from the wireless power transmitting device (200). The power receiving circuit (330) may include a charging coil (331) configured to be wirelessly connected to the power receiving circuit included in the wireless power transmitting device (200). In the present disclosure, the charging coil (331) may be referred to as the power receiving coil, and the power receiving circuit included in the wireless power transmitting device (200) may be referred to as the second external power transmitting circuit.

[0082] According to one embodiment, the electronic device (300) may perform in-band communication using a designated modulation method (e.g., rectified voltage (Vrect) modulation method or load modulation method). For example, the designated modulation method may be performed using an on-off keying (OOK) method. For example, the designated modulation method may be performed using an amplitude shift keying (ASK) method. In-band communication may be used, for example, for the electronic device (300) to transmit information to the wireless power transmission device (200) regarding the state of the electronic device (300) (e.g., temperature), the state of the battery (350), the charging state, errors during charging, and / or the end of charging. The electronic device (300) may control the power transmitted from the wireless power transmission device (200) by performing in-band communication, for example, using a power receiving circuit (330). According to one embodiment, the power receiving circuit (330) may include a capacitor circuit having at least one capacitor used for in-band communication. An example of an electronic device (300) including a capacitor circuit is described below with reference to FIGS. 5 to 7.

[0083] According to one embodiment, when a rectified voltage modulation method is used, the electronic device (300) can transmit specific data (or, signal) to the wireless power transmission device (200) by changing the voltage of the DC power rectified through the rectification circuit (rectified voltage). The wireless power transmission device (200) can interpret the signal of the electronic device (300) by detecting a change in the rectified voltage (e.g., a change pattern) through a change in the current or voltage of the transmitting charging coil. The rectified voltage modulation method enables data transmission by finely adjusting the rectified voltage and can continuously maintain in-band communication even during charging.

[0084] According to one embodiment, when performing in-band communication using a rectified voltage modulation method, the electronic device (300) can modulate a signal for in-band communication by changing the state of the load and changing the rectified voltage by adjusting the capacitance value of a capacitor circuit placed in front of the rectified circuit in the power receiving circuit (330). For example, if the change in the rectified voltage is large, the signal can be modulated to "1", and if the change in the rectified voltage is small, the signal can be modulated to "0". For example, as a change in load occurs in the coil (331) of the electronic device (300), the wireless power transmitting device (200) can check the change in the signal measured in the coil, and if the change in voltage is large (e.g., if a high voltage is detected), the signal can be modulated to "1", and if the change in voltage is small (e.g., if a low voltage is detected), the signal can be modulated to "0". When the capacitor circuit is formed with fixed capacitors having a fixed capacitance value, the electronic device (300) can close or open a switch connected to each capacitor to vary the capacitance value of the capacitor circuit placed in front of the rectifier circuit. When the switch connected to the capacitor is closed, the capacitor is included (or connected) in the capacitor circuit, and when the switch connected to the capacitor is opened, the capacitor can be excluded (or disconnected, or unconnected) from the capacitor circuit.

[0085] According to one embodiment, the power receiving circuit (330) obtains a first alternating current power (AC1) and a second alternating current power (AC2) by electromagnetic induction through a charging coil (331), and a specific voltage (V Oout DC power having (e.g., Vrect of FIGS. 4 to 7) can be output. The output power can be transferred to a first charging circuit (421) or a second charging circuit (422) under the control of the processor (310).

[0086] According to one embodiment, the power receiving circuit (330) may receive a first power of a first voltage wirelessly from the wireless power transmitting device (200) in a first charging mode. Alternatively, the power receiving circuit (330) may receive a second power of a second voltage wirelessly from the wireless power transmitting device (200) in a second charging mode. For example, the second charging mode may be a mode for receiving power of a relatively higher voltage compared to the first charging mode. For example, the second voltage may be 20V, and the first voltage may be 10V. However, this is merely illustrative, and the technical concept of the present invention may not be limited thereto.

[0087] According to one embodiment, the OVP circuit (410) can receive power via a wire from an external power source (201) through a Vbus (or port) connected to a wired charging terminal (401) and transmit the received power to a first charging circuit (421) or a second charging circuit (422). The OVP circuit (410) can perform, for example, an overvoltage protection (OVP) function. The OVP circuit (410) can cut off the received power, for example, if power having a voltage higher than a set voltage (e.g., OVP value) is received.

[0088] According to one embodiment, the first charging circuit (421) can output input power to the battery (350). The first charging circuit (421) may be electrically connected, for example, to a wired charging terminal (401) and / or a power receiving circuit (330). The first charging circuit (421) may be implemented, for example, as an IF PMIC, a buck charging circuit, or a buck charger. In the present disclosure, the first charging circuit (421) may be referred to as the first charger.

[0089] According to one embodiment, the first charging circuit (421) is a first input port (CHG INReceives power received via a wire through ), and / or a second input port (WC IN Power received wirelessly can be input through ). According to one embodiment, the first charging circuit (421) can output power to the battery (350) through the output port (BATT) or / or output power to at least one component through the output port (SYS). For example, the first charging circuit (421) can distribute wired power received through the wired charging terminal (401) or wireless power received through the power receiving circuit (330) to the battery (350) and at least one electronic component. At least one component may include a processor.

[0090] According to one embodiment, the first charging circuit (421) can output a voltage of input power by stepping it down according to the rated voltage or full voltage of the battery (350). For example, 10V of power is input to the first charging circuit (421), and the full voltage (V) of the battery (350) BATT If ) is 5V, power stepped down to 5V can be output to the battery (350). Alternatively, 10V of power is input to the first charging circuit (421), and the full charge voltage (V) of the battery (350) BATT If the voltage is 4.3V, power stepped down to 4.3V can be output to the battery (350). The output ports (SYS, BATT) of the first charging circuit (421) are shown as two, but can be configured as a single output port. The power from the output port (SYS) of the first charging circuit (421) can be output to the output port (BATT) after passing through the switch.

[0091] According to one embodiment, the second charging circuit (422) can output input power to the battery (350). The second charging circuit (422) may be electrically connected, for example, to a wired charging terminal (401) and / or a power receiving circuit (330). The second charging circuit (422) may be implemented, for example, as a direct charging circuit or a direct charger. In the present disclosure, the second charging circuit (422) may be referred to as a second charger.

[0092] According to one embodiment, the second charging circuit (422) is the first input port (V IN1 Receives power received via a wire through ), and / or the second input port (V IN2 Power received wirelessly can be input through ). According to one embodiment, the second charging circuit (422) is an output port (V OUT Power can be output to the battery (350) through ). For example, the second charging circuit (422) can transmit wired power received through the wired charging terminal (401) or wireless power received through the power receiving circuit (330) to the battery (350).

[0093] According to one embodiment, the second charging circuit (422) can output the voltage of the input power by stepping it down according to the rated voltage or full voltage of the battery (350). For example, the second charging circuit (422) can output the voltage of the input power by stepping it down by 0.25 (1 / 4) times. For example, if 20V of power is input to the second charging circuit (422) and the full voltage of the battery (350) is 5V, the power stepped down to 5V can be output to the battery (350).

[0094] Referring to FIG. 4b, the electronic device (300) can receive a first power of a first voltage from a wireless power transmission device (200) in, for example, a first charging mode (e.g., a low voltage charging mode or a low power charging mode). The electronic device (300) can transmit the first power to a battery (350) through a first charging path (CP1) in, for example, a first charging mode. Through this, the battery (350) can be charged.

[0095] According to one embodiment, the first charging path (CP1) may include, for example, a power receiving circuit (330) and a first charging circuit (421). The path through which the electronic device (300) transmits the first power to the battery (350) via the first charging path (CP1) may mean, for example, a path through which the electronic device (300) transmits the first power to the battery (350) via the power receiving circuit (330) and the first charging circuit (421). In the present disclosure, the first charging path (CP1) may also be referred to as the first power transmission path.

[0096] According to one embodiment, the power receiving circuit (330) can transmit a first power of a first voltage input under the control of the processor (310) to the first charging circuit (421). The first charging circuit (421) can output power to the battery (350) by stepping down the first power according to the full voltage or rated voltage of the battery (350). For example, if the first voltage is 10V and the full voltage of the battery (350) is 5V, the first charging circuit (421) can output power of 10V to the battery (350) by stepping down the charging voltage to 5V. For example, the first voltage may be 10V and the voltage of the battery (350) may be 4V. The first charging circuit (421) can charge with a specified current (e.g., 1A) and output to the battery (350) by stepping down the charging voltage.

[0097] Referring to FIG. 4c, the electronic device (300) can receive a second power of a second voltage from a wireless power transmission device (200) in, for example, a second charging mode (e.g., a high-voltage charging mode or a high-power charging mode). The electronic device (300) can transmit the second power to a battery (350) through a second charging path (CP2) in, for example, a second charging mode. Through this, the battery (350) can be charged.

[0098] According to one embodiment, the second charging path (CP2) may include, for example, a power receiving circuit (330) and a second charging circuit (422). The path through which the electronic device (300) transmits the second power to the battery (350) via the second charging path (CP2) may mean, for example, a path through which the electronic device (300) transmits the second power to the battery (350) via the power receiving circuit (330) and the second charging circuit (422). In the present disclosure, the second charging path (CP2) may also be referred to as the second power transmission path.

[0099] According to one embodiment, the power receiving circuit (330) can transmit a second power of a second voltage input under the control of the processor (310) to the second charging circuit (422). The second charging circuit (422) can output power to the battery (350) by stepping down the second power according to the full voltage or rated voltage of the battery (350). For example, if the second voltage is 20V and the full voltage of the battery (350) is 5V, the second charging circuit (422) can step down the 20V power to 5V and output it to the battery (350). For example, the second voltage may be approximately 16V and the charging voltage of the battery (350) may be 4V. The second charging circuit (422) can output to the battery (350) by stepping down the charging voltage by a 4:1 ratio. The second charging circuit (4220) can charge with a specified current (e.g., 2A) and output to the battery (350) by dropping the charging voltage.

[0100] According to one embodiment, the electronic device (300) may switch (or change) the charging path when a specified condition is satisfied or when the occurrence of a specified event is confirmed while the battery (350) is being charged. For example, the electronic device (300) may switch the charging path when the charging mode is changed. For example, cases where the charging mode is changed may include, for example, changing the first charging mode to the second charging mode or changing the second charging mode to the first charging mode. Changing the first charging mode (e.g., IF PMIC charging mode) to the second charging mode (e.g., DC charging mode) may be applied, for example, to a situation where DC charging starts or low-temperature swelling is released. For example, changing the second charging mode (e.g., DC charging mode) to the first charging mode (e.g., IF PMIC charging mode) may be applied, for example, to a DC top-off situation, a primary full charge situation of the battery, or a low-temperature swelling entry situation.

[0101] Meanwhile, in order to switch the charging path during wireless charging, the electronic device (300) sets the battery charging current (Iout) to a reference current or lower (e.g., set to 0mA) during the power transfer phase. In this case, a situation occurs where the maximum voltage of the power receiving circuit (330) (e.g., the maximum voltage of the rectified voltage (Vrect)) momentarily rises above the specified voltage (e.g., OVP value, 24V), and the electronic device (300) stops charging to protect the power receiving circuit (330). For example, when the battery charging current (Iout) is set to 0mA to switch the charging path in a light load state (e.g., a fully charged battery state), the voltage gain increases significantly during the switching operation for in-band communication, causing the rectified voltage (Vrect) to overshoot (e.g., as illustrated in FIG. 12, the rectified voltage (Vrect) overshoots to about 24V or higher), and the charging operation may be stopped. Accordingly, in order to switch the charging path without interrupting wireless charging in any state (e.g., light load state), a protection measure may be required to prevent voltage overshooting of the power receiving circuit (330) while performing the switching operation. Meanwhile, the procedure for switching the charging path for wireless charging may include, for example, a first charging operation, a switching operation of the charging path (e.g., operation 820 of FIG. 8, operation 920 of FIG. 9, or operation 1020 of FIG. 10), a finishing (or completion) operation of the switching of the charging path (e.g., operation 830 of FIG. 8, operation 930 of FIG. 9, or operation 1030 of FIG. 10), and / or a second charging operation according to the switched charging path. Hereinafter, with reference to FIG. 5 to 10, an exemplary method for preventing voltage overshooting of the power receiving circuit (330) while performing the switching operation of the charging path will be described through an explanation of the circuit configuration and operation of the power receiving circuit (330).

[0102] FIGS. 5 to 7 are drawings showing the configuration of a power receiving circuit according to one embodiment of the present disclosure.

[0103] In the embodiments of FIGS. 5 to 7, the power receiving circuit (330) may be an example of the power receiving circuit (330) of FIGS. 3 to 4c. The power receiving circuit (330) may be electrically connected to a first charging circuit (e.g., the first charging circuit (421) of FIGS. 4a to 4c) or a second charging circuit (e.g., the second charging circuit (422) of FIGS. 4a to 4c) through a terminal A (or node) under the control of a processor (e.g., the processor (310) of FIGS. 3 to 4c). The power receiving circuit (330) may include at least one configuration (e.g., a load (710) and / or a load (720)) to prevent overshooting of the voltage of the power receiving circuit (330) while performing a switching operation.

[0104] Referring to FIG. 5, the power receiving circuit (330) may be connected to a capacitor circuit comprising a charging coil (331) and / or at least one capacitor (e.g., a first capacitor (Ca) and a second capacitor (Cb)). The power receiving circuit (330) may include a switch circuit and / or a rectifier circuit (510) comprising at least one switch (e.g., SWa1, SWa2, SWb1 and / or SWb2) connected to at least one capacitor. According to one embodiment, the capacitor circuit may be used, for example, for modulating a signal for in-band communication. According to one embodiment, the capacitor circuit may be included in a communication circuit (e.g., the communication circuit (360) of FIG. 3). According to one embodiment, the switch circuit may be included in the power receiving circuit (330).

[0105] According to one embodiment, the rectifier circuit (510) can rectify alternating current (AC) power and convert it into direct current (DC) power. For example, the rectifier circuit (510) can rectify AC wireless power received through the first alternating current power input terminal (AC1) and the second alternating current power input terminal (AC2) via the charging coil (331) and convert it into DC power. In the present disclosure, the voltage of the DC power rectified by the rectifier circuit (510) may be referred to as the rectified voltage (Vrect).

[0106] According to one embodiment, the capacitor circuit may be positioned in front of the rectifier circuit (510). For example, the capacitor circuit may be positioned outside the power receiving circuit (330) and in front of the rectifier circuit (510), and may include a first capacitor (Ca) connected to a first AC power input terminal (AC1) and a second capacitor (Cb) connected to a second AC power input terminal (AC2).

[0107] According to one embodiment, the first capacitor (Ca) may include at least one of a plurality of capacitors (Ca1, Ca2) connected in parallel according to the configuration, but is not limited thereto. For example, the first capacitor (Ca) may include only a single capacitor or three or more capacitors connected in parallel. Each capacitor (Ca1, Ca2) of the first capacitor (Ca) may be, for example, a fixed capacitor and may be connected to a corresponding switch (SWa1, SWa2) (e.g., a transistor). For example, capacitor (Ca1) may be connected to switch (SWa1) and capacitor (Ca2) may be connected to switch (SWa2). Switches (SWa1, SWa2) may be included in a power receiving circuit (330). Depending on the on / off state of the switches (SWa1, SWa2), the corresponding capacitors (Ca1, Ca2) may or may not be included in the first capacitor (Ca). Through this, the maximum capacitance value of the first capacitor (Ca) can be set in various ways. The on / off state of the switches (SWa1, SWa2) can be controlled by the processor (310).

[0108] According to one embodiment, the second capacitor (Cb) may include at least one of a plurality of capacitors (Cb1, Cb2) connected in parallel according to the configuration, but is not limited thereto. For example, the second capacitor (Cb) may include only a single capacitor or three or more capacitors connected in parallel. Each capacitor (Cb1, Cb2) of the second capacitor (Cb) may be, for example, a fixed capacitor and may be connected to a corresponding switch (SWb1, SWb2) (e.g., a transistor). For example, capacitor (Cb1) may be connected to switch (SWb1) and capacitor (Cb2) may be connected to switch (SWb2). Switches (SWb1, SWb2) may be included in the power receiving circuit (330). Depending on the on / off state of the switches (SWb1, SWb2), the corresponding capacitors (Cb1, Cb2) may or may not be included in the second capacitor (Cb). Through this, the maximum capacitance value of the second capacitor (Cb) can be set to various values. The on / off state of the switches (SWb1, SWb2) can be controlled by the processor (310).

[0109] According to one embodiment, when the first capacitor (Ca) and the second capacitor (Cb) are fixed capacitors, the capacitance value of the first capacitor (Ca) may be set to be the same as or different from the capacitance value of the second capacitor (Cb). The capacitance value of each capacitor (Ca1, Ca2) of the first capacitor (Ca) may be set to be the same as or different. The capacitance value of each capacitor (Cb1, Cb2) of the second capacitor (Cb) may be set to be the same as or different.

[0110] According to one embodiment, the electronic device (300) (or processor (310)) may determine a combination of capacitors to be used for rectified voltage modulation in the capacitor circuit. For example, when performing a charging operation, the electronic device (300) may activate both the first capacitor (Ca) and the second capacitor (Cb) for rectified voltage modulation. For example, when performing a switching operation of the charging circuit (e.g., when performing a switching operation of the charging circuit under light load conditions), the electronic device (300) may activate only one of the capacitors, either the first capacitor (Ca) or the second capacitor (Cb), for rectified voltage modulation. As an example, the electronic device (300) may activate only the first capacitor (Ca) for rectified voltage modulation and deactivate the second capacitor (Cb). At this time, the deactivation of the second capacitor (Cb) can be achieved by turning off the switches (SWb1, SWb2) connected to the second capacitor (Cb). Through this, the total capacitance value of the capacitor circuit when performing the switching operation of the charging circuit may be lower than when performing the charging operation. Through this method, overshooting of the rectified voltage (Vrect) can be prevented during the switching operation of the charging path.

[0111] According to one embodiment, an electronic device (300) (or a processor (310)) can perform rectified voltage modulation by changing the value of the rectified voltage by adjusting the capacitance value of a capacitor circuit set to the activated capacitor(s). The capacitance value of the capacitor circuit can be adjusted, for example, by controlling the ON / OFF of a switch connected to the activated capacitor(s) within the capacitor circuit. Through this adjustment of the capacitance value, if the change in the rectified voltage is large, the signal can be modulated to "1", and if the change in the rectified voltage is small, the signal can be modulated to "0". The power receiving circuit (330) can transmit data for communication to a wireless power transmitting device (200) through this rectified voltage modulation. For example, the electronic device (300) can effectively control the charging voltage from the power transmission circuit (240) to the power reception circuit (330) by changing the value of the rectified voltage (Vrect) by adjusting the capacitance value of the capacitor circuit, thereby transmitting a modulation signal reflecting the state of the power reception circuit (330) from the power reception circuit (330) to the power transmission circuit (240).

[0112] Meanwhile, in the embodiment of FIG. 5, for convenience of explanation, each capacitor of the capacitor circuit is implemented as a fixed capacitor and connected to a switch, but the embodiment is not limited thereto. For example, at least one of the capacitors of the capacitor circuit may be implemented as a variable capacitor (e.g., a digital capacitor). When the capacitor is implemented as a variable capacitor, a switch may not be required to adjust the capacitance value of the capacitor. When the capacitor is implemented as a variable capacitor, the processor (310) can adjust the capacitance value of the capacitor directly without using a switch.

[0113] Referring to FIG. 6, compared to the power receiving circuit (330) of FIG. 5, the power receiving circuit (330) of FIG. 6 may further include an adjustment circuit (610).

[0114] According to one embodiment, the adjustment circuit (610) is configured to adjust the charging voltage (e.g., the battery charging voltage (Vout) of FIG. 4a to 4c) and may include, for example, a linear regulator (e.g., an LDO (low dropout)). The adjustment circuit (610) may be placed, for example, downstream of the rectifier circuit (510) in the power receiving circuit (330). The adjustment circuit (610) may receive the rectified voltage (Vrect) as input and output the output voltage (Vo). The difference between the input voltage (Vrect) and the output voltage (Vo) of the adjustment circuit (610) may be defined as the headroom for the adjustment circuit (610). For example, in the case of the adjustment circuit (610) including the linear regulator, a voltage difference greater than the dropout voltage may be required as the headroom to operate stably. The headroom may be set to various values ​​depending on the state of the electronic device (300), the state of the battery (350), or the charging environment. For example, during the initial charging of the battery (350), high power is required at the power receiving side, so the headroom may be set to a low value. For example, during the middle charging of the battery (350), the power required at the power receiving side decreases, so the headroom may be set to a gradually higher value. For example, at the end charging of the battery (350) (e.g., primary full charge state), the headroom may be set to a value higher than a specified standard to prevent UVLO (under voltage lock out) caused by a drop in the battery charging voltage (Vout).

[0115] According to one embodiment, when performing a charging operation, the electronic device (300) (or processor (310)) may set the value of the headroom for the adjustment circuit (610) to a first headroom value (e.g., 800mV). According to one embodiment, when performing a switching operation of the charging circuit (e.g., when performing a switching operation of the charging circuit under light load conditions), the electronic device (300) (or processor (310)) may set the value of the headroom for the adjustment circuit (610) to a second headroom value (e.g., 100mV) which is lower than the first headroom value (e.g., 800mV). By doing so, by setting the value of the headroom for the adjustment circuit (610) when performing the switching operation of the charging circuit to be lower than when performing the charging operation, overshooting of the rectified voltage (Vrect) during the switching operation can be prevented.

[0116] Referring to FIG. 7, compared to the power receiving circuit (330) of FIG. 6, the power receiving circuit (330) of FIG. 7 may further include at least one of a first load (710) or a second load (720). The first load (710) and / or the second load (720) may provide a load that consumes current so that it can operate normally under certain conditions. The first load (710) and / or the second load (720) may be used, for example, to alleviate light load situations. The first load (710) and / or the second load (720) may serve to consume the DC voltage generated in the rectifier circuit (510) and / or the adjustment circuit (610). The first load (710) and / or the second load (720) may be formed to stabilize the output voltage Vo. For example, when the system enters a low-power mode or the actual load is temporarily reduced, the first load (710) and / or the second load (720) can serve as dummy loads to consume current and prevent a sudden change in output voltage.

[0117] In the present disclosure, the first rod (710) and / or the second rod (720) may be referred to as a dummy rod to distinguish it from the rod (350) of FIG. 3.

[0118] According to one embodiment, the first load (710) may be placed at the rear end of the adjustment circuit (610). For example, the first load (710) may be placed at the rear end of the adjustment circuit (610) within the power receiving circuit (330) (e.g., connected in series to the adjustment circuit (610)), but is not limited thereto. For example, the first load (710) may be connected at any point on the path between the power receiving circuit (330) (or the rectifier circuit (510)) and the second charging circuit (422) or the first charging circuit (421). For example, the first load (710) may be connected in parallel between Vo, which is the DC output line of the adjustment circuit (610), and ground. According to one embodiment, since the first load (710) passes through the adjustment circuit (610), it may dynamically operate as a load depending on the conditions of the output voltage. For example, by adjusting the current flowing through the first load (710) by the adjustment circuit (610), more precise voltage control may be possible.

[0119] According to one embodiment, the second load (720) may be placed in front of the adjustment circuit (610). For example, the second load (720) may be placed between the rectifier circuit (510) and the adjustment circuit (610) within the power receiving circuit (330) (e.g., connected to Vrect independently of the adjustment circuit (610)). For example, the second load (720) may be connected in parallel between Vrect, which is a DC output line, and ground. According to one embodiment, the second load (720) may serve to consume the current of the adjustment circuit (610).

[0120] According to one embodiment, the first load (710) and / or the second load (720) may be connected to the front end of the first charging circuit (421) or the second charging circuit (422) on the first charging path (CP1) or the second charging path (CP2).

[0121] According to one embodiment, the values ​​of the first load (710) and the second load (720) may be variable. The values ​​of the first load (710) and the second load (720) may be set by the processor (310). Each value of the first load (710) and the second load (720) (e.g., current consumption value) may be set within a specified range (e.g., from 0 mA to several hundred mA). The value of the first load (710) may be different from or the same as the value of the second load (720).

[0122] According to one embodiment, the first load (710) and / or the second load (720) may be optionally connected (or added) to the first charging path (CP1) or the second charging path (CP2) or disconnected (or detached) under the control of the processor (310). For example, the processor (310) may substantially disconnect the first load (710) from the first charging path (CP1) or the second charging path (CP2) by setting the value of the first load (710) to 0 mA. For example, the processor (310) may substantially connect the first load (710) to the first charging path (CP1) or the second charging path (CP2) by setting the value of the first load (710) to a first value greater than 0 mA. In this case, the first load (710) may be connected to the first charging path (CP1) or the second charging path (CP2) at the first value.

[0123] According to one embodiment, when performing a charging operation, the electronic device (300) (or processor (310)) may substantially disconnect the first load (710) and the second load (720) from the first charging path (CP1) or the second charging path (CP2) (or power receiving circuit (330)) by setting the values ​​of the first load (710) and the second load (720) to a value of 0mA. According to one embodiment, when performing a switching operation of the charging circuit (e.g., when performing a switching operation of the charging circuit in a light load state), the electronic device (300) (or processor (310)) may substantially connect the first load (710) and / or the second load (720) from the first charging path (CP1) or the second charging path (CP2) (or power receiving circuit (330)) by setting the current flowing through the first load (710) and / or the second load (720) not to be 0mA. By adding (or connecting) such a dummy load, light load conditions are alleviated (e.g., the battery charging current (Iout) is increased by about 100mA) while the switching operation of the charging circuit is performed, thereby preventing overshooting of the rectified voltage (Vrect).

[0124] FIG. 8 is a flowchart illustrating the operation of an electronic device switching a charging path according to one embodiment of the present disclosure.

[0125] Referring to FIG. 8, according to one embodiment, in operation 810, an electronic device (e.g., the electronic device (101) of FIG. 1, or the wireless power receiving device (300) of FIG. 3 to 7) can detect the occurrence of a specified event associated with the switching of a charging path while a battery (e.g., the battery (350) of FIG. 3 to 7) is being charged. For example, the electronic device can detect the occurrence of a specified event associated with the switching of the charging path while the battery is being charged through one of a charging path, which includes a first charging path (e.g., the first charging path (CP1) of FIG. 4b) comprising a wireless power receiving circuit (e.g., the power receiving circuit (330) of FIG. 3 to 7) and a first charging circuit (e.g., the first charging circuit (421) of FIG. 4a to 4c) or a second charging path (e.g., the second charging path (CP2) of FIG. 4c) comprising a wireless power receiving circuit and a second charging circuit (e.g., the first charging circuit (421) of FIG. 4a to 4c).

[0126] According to one embodiment, the electronic device can detect the occurrence of a specified event associated with the switching of the charging path when it is identified that a specified condition is satisfied while the battery is being charged. For example, the electronic device (300) can detect the occurrence of a specified event associated with the switching of the charging path when it is identified that the charging mode is changed. For example, cases where the charging mode is changed may include, for example, changing the first charging mode to the second charging mode or changing the second charging mode to the first charging mode. Changing the first charging mode (e.g., IF PMIC charging mode) to the second charging mode (e.g., DC charging mode) may apply, for example, to a situation where DC charging starts or low-temperature swelling is released. Changing the second charging mode (e.g., DC charging mode) to the first charging mode (e.g., IF PMIC charging mode) may apply, for example, to a DC top-off situation, a primary full charge situation of the battery, or a low-temperature swelling entry situation. For example, the electronic device (300) may confirm the occurrence of a designated event to switch the first charging path (CP1) to the second charging path (CP2) to receive a second power higher than the first power when it is identified that a new wireless power transmitter capable of transmitting the second power is detected while receiving the first power. For example, the electronic device (300) may confirm the occurrence of a designated event to switch the second charging path (CP1) to the first charging path (CP1) to receive the first power when it is identified that a new wireless power transmitter capable of transmitting the first power is detected while receiving the second power. For example, the electronic device (300) may confirm the occurrence of a designated event to switch the second charging path (CP2) to the first charging path (CP1) to receive a first power lower than the second power when it is identified that a heat control command is detected while receiving the second power.For example, the electronic device (300) can identify the occurrence of a designated event to switch the first charging path (CP1) to the second charging path (CP2) to receive a second power higher than the first power when it is identified that a heat control release command is detected while receiving the first power.

[0127] According to one embodiment, in operation 820, the electronic device may perform an operation of switching a charging path (e.g., a charging path in which the battery is currently charged) to another charging path among a first charging path and a second charging path, based at least in part on an operation of confirming the occurrence of a specified event. In the present disclosure, the operation of switching a charging path may be abbreviated as a switching operation or a charging path switching operation.

[0128] According to one embodiment, the switching operation may include, for example, an operation of applying at least one switching setting. The at least one switching setting may include a first switching setting applied to at least one capacitor (e.g., the first capacitor (Ca1) and / or the second capacitor (Ca2) of FIG. 5 to 7), a second switching setting applied to a load (e.g., the first load (710) and / or the second load (720) of FIG. 7), and / or a third switching setting applied to the headroom for an adjustment circuit (e.g., the adjustment circuit (610) of FIG. 6 to 7). Hereinafter, the operation of applying the switching setting is described by way of example.

[0129] According to one embodiment, the switching operation may change the setting of at least one capacitor among the first capacitor (e.g., the first capacitor (Ca) in FIGS. 5 to 7) or the second capacitor so that the maximum voltage of the wireless power receiving circuit (e.g., the maximum voltage of the rectified voltage (Vrect) in FIGS. 5 to 7) is lower than before the switching operation is initiated.

[0130] According to one embodiment, as at least part of an operation to change the setting for at least one capacitor, the electronic device may maintain the connection between the first capacitor and the charging coil (e.g., the charging coil (331) of FIG. 4a to 7) and disconnect the connection between the second capacitor and the charging coil. For example, the electronic device may disconnect the connection between the second capacitor and the charging coil by keeping the switch connected to the second capacitor (e.g., the switch (SWb1, SWb2) of FIG. 5 to 7) in the OFF state while the switching operation is performed. In this way, while the switching operation is performed, the second capacitor in the capacitor circuit may be deactivated and only the first capacitor may be activated. In this case, the total capacitance value of the capacitor circuit depends only on the capacitance value of the first capacitor. Accordingly, the electronic device can perform rectified voltage modulation by changing the rectified voltage by adjusting the capacitance value of the first capacitor through ON / OFF control of a switch connected to the first capacitor (e.g., switches (SWa1, SWa2) of FIG. 5 to 7). Meanwhile, prior to the switching operation, since both the first capacitor and the second capacitor are active in the capacitor circuit, the maximum value of the total capacitance of the capacitor circuit may have the maximum value of the capacitance of the combination of the first capacitor and the second capacitor. In contrast, during the switching operation, since only the first capacitor is active, the maximum value of the total capacitance of the capacitor circuit may be limited to the maximum value of the capacitance of the first capacitor. Therefore, the maximum capacitance value of the capacitor circuit during the switching operation may be lower than the maximum capacitance value of the capacitor circuit prior to the switching operation. Consequently, the maximum voltage value of the rectified voltage modulated through the capacitor circuit during the switching operation may be lower than the maximum voltage value of the rectified voltage modulated through the capacitor circuit prior to the switching operation.Through this, for example, even under light load conditions, overshooting of the rectified voltage generated by the switching operation is prevented, and the wireless power receiving circuit can be protected.

[0131] According to one embodiment, at least one of the first capacitor or the second capacitor may be a variable capacitor. The electronic device may set the variable capacitor to a first capacitance value at least temporarily while the battery is being charged through a charging path. As at least part of an operation to change the setting for at least one capacitor, the electronic device may set the variable capacitor to a second capacitance value different from the first capacitance value. The maximum value of the total capacitance value of the capacitor circuit including the variable capacitor set to the second capacitance value may be lower than the maximum value of the total capacitance value of the capacitor circuit including the variable capacitor set to the first capacitance value. Accordingly, the maximum voltage value of the rectified voltage modulated through the capacitor circuit during the switching operation may be lower than the maximum voltage value of the rectified voltage modulated through the capacitor circuit before the switching operation is performed. Through this, for example, even under light load conditions, overshooting of the rectified voltage generated by the switching operation is prevented, and the wireless power receiving circuit can be protected.

[0132] According to one embodiment, a charging path (e.g., a first charging path or a second charging path) may include a load (e.g., a first load (710) and / or a second load (720) of FIG. 7) configured to be optionally connected to a wireless power receiving circuit. According to one embodiment, an electronic device may disconnect the load from the wireless power receiving circuit, at least temporarily, while the battery is being charged through the charging path. The electronic device may connect to the wireless power receiving circuit through the control of a processor (e.g., controlling the value of the load) as at least part of a switching operation. This allows light load conditions to be mitigated (e.g., the value of the battery charging current (Iout) in FIG. 4a to 4c to be increased by 100mA). Thus, the wireless power receiving circuit may be protected by preventing overshooting of the rectified voltage that occurs when a switching operation is performed, for example, under a light load condition.

[0133] According to one embodiment, a charging path (e.g., a second charging path) may include a control circuit (e.g., a control circuit (610) of FIG. 6 and 7) connected to a wireless power receiving circuit. While the battery is being charged through the charging path, the electronic device may set the headroom for the control circuit to a first headroom value (e.g., 800 mV) at least temporarily. As at least part of the switching operation, the electronic device may set the headroom to a second headroom value (e.g., 100 mV) that is smaller than the first headroom value. This prevents overshooting of the rectified voltage caused by the switching operation, even under light load, for example, thereby protecting the wireless power receiving circuit.

[0134] According to one embodiment, in operation 830, the electronic device may perform an operation to finish (or complete) the operation of switching the charging path (switching operation). In the present disclosure, the operation to finish (or complete) the switching operation may be abbreviated as switching finishing operation, switching completion operation, switching completion operation, charging path switching finishing operation, or charging path switching completion operation.

[0135] According to one embodiment, the transition finishing operation may include, for example, an operation to restore at least one transition setting to a specified default setting. Below, the operation of restoring to a default setting is described as an example.

[0136] According to one embodiment, the electronic device may restore a setting for at least one capacitor (a first switching setting) to a specified default setting based at least in part on the completion of the switching operation of operation 820. For example, the electronic device may restore the setting to a default setting based on the fact that the charging current (Iout) input to the battery after the switching operation is completed is greater than or equal to a specified threshold. The operation of restoring a setting for at least one capacitor to a specified default setting may include, for example, an operation of setting both the first capacitor and the second capacitor to be connected to the charging coil.

[0137] According to one embodiment, the electronic device can restore a setting for a load (a second switching setting) to a specified default setting based at least partially on the completion of a switching operation of operation 820. The operation of restoring the second switching setting applied to the load to a default setting may include, for example, an operation of disconnecting the load from a wireless power receiving circuit through the control of a processor.

[0138] According to one embodiment, the electronic device can restore the setting for the headroom of the adjustment circuit (third switching setting) to a specified default setting based at least partially on the completion of the switching operation of operation 820. The operation of applying the third switching setting applied to the headroom of the adjustment circuit to the default setting may include, for example, an operation of setting the value of the headroom from a second headroom value (100mV) to a first headroom value (e.g., 800mV), which is the default headroom value.

[0139] As described above, when performing a switching operation, at least one switching setting is applied to the wireless power receiving circuit to prevent overshooting of the rectified voltage generated by the switching operation. Therefore, when the switching operation is completed, in order to finalize the switching procedure, the electronic device restores the applied switching setting to the default setting so that the charging operation can be performed normally through the switched charging circuit.

[0140] FIG. 9 is a flowchart illustrating the operation of an electronic device switching a charging path from a first charging path to a second charging circuit according to one embodiment of the present disclosure.

[0141] Referring to FIG. 9, according to one embodiment, in operation 910, an electronic device (e.g., the electronic device (101) of FIG. 1, or the wireless power receiving device (300) of FIG. 3 to 7) can detect the occurrence of a specified event associated with the switching of a charging path while a battery (e.g., the battery (350) of FIG. 3 to 7) is being charged through a first charging path (e.g., the first charging path (CP1) of FIG. 4b) comprising a wireless power receiving circuit (e.g., the power receiving circuit (330) of FIG. 3 to 7) and a first charging circuit (e.g., the first charging circuit (421) of FIG. 4a to 4c). The description of operation 910 of FIG. 9 may include the description of operation 810 of FIG. 8.

[0142] According to one embodiment, in operation 920, the electronic device may perform an operation of switching a first charging path to a second charging path based at least partially on an operation of confirming the occurrence of a specified event. The description of operation 920 of FIG. 9 may include the description of operation 820 of FIG. 8. According to one embodiment, operation 920 may include at least one of operation 921, operation 922, or operation 923. In the present disclosure, the operation of switching a first charging path to a second charging path may be referred to as a first switching operation or a first charging path switching operation.

[0143] According to one embodiment, in operation 921, the electronic device may apply at least one switching setting as at least part of the first switching operation. The at least one switching setting may include a first switching setting applied to at least one capacitor (e.g., the first capacitor (Ca1) and / or the second capacitor (Ca2) of FIG. 5 to 7), a second switching setting applied to a load (e.g., the load (710) of FIG. 7), and / or a third switching setting applied to an adjustment circuit (e.g., the adjustment circuit (610) of FIG. 6 to 7).

[0144] According to one embodiment, the operation of applying a first switching setting to at least one capacitor may include changing the setting for at least one capacitor among the first capacitor (e.g., the first capacitor (Ca) in FIGS. 5 to 7) or the second capacitor (e.g., the second capacitor (Cb) in FIGS. 5 to 7) so that the maximum voltage of the wireless power receiving circuit (e.g., the maximum voltage of the rectified voltage (Vrect) in FIGS. 5 to 7) is lower than before the switching operation is initiated.

[0145] According to one embodiment, as at least part of an operation to change the setting for at least one capacitor, the electronic device may maintain the connection between the first capacitor and the charging coil (e.g., the charging coil (331) of FIG. 4a to 7) and disconnect the connection between the second capacitor and the charging coil. For example, while the first switching operation is performed, the electronic device may disconnect the connection between the second capacitor and the charging coil by keeping the switch connected to the second capacitor (e.g., the switch (SWb1, SWb2) of FIG. 5 to 7) in the OFF state. In this way, while the first switching operation is performed, the second capacitor may be deactivated and only the first capacitor may be activated in the capacitor circuit. Alternatively, prior to the first switching operation being performed, both the first capacitor and the second capacitor may be in an activated state in the capacitor circuit. Therefore, the maximum capacitance value of the capacitor circuit during the switching operation can be lower than the maximum capacitance value of the capacitor circuit prior to the switching operation. Consequently, the maximum voltage value of the rectified voltage modulated through the capacitor circuit during the switching operation can be lower than the maximum voltage value of the rectified voltage modulated through the capacitor circuit prior to the switching operation. Through this, for example, even under light load conditions, overshooting of the rectified voltage generated by the switching operation is prevented, thereby protecting the wireless power receiving circuit.

[0146] According to one embodiment, at least one of the first capacitor or the second capacitor may be a variable capacitor. The electronic device may set the variable capacitor to a first capacitance value at least temporarily while the battery is being charged through a charging path. As at least part of an operation to change the setting for at least one capacitor, the electronic device may set the variable capacitor to a second capacitance value different from the first capacitance value. The maximum value of the total capacitance value of the capacitor circuit including the variable capacitor set to the second capacitance value may be lower than the maximum value of the total capacitance value of the capacitor circuit including the variable capacitor set to the first capacitance value. Accordingly, the maximum voltage value of the rectified voltage modulated through the capacitor circuit during the switching operation may be lower than the maximum voltage value of the rectified voltage modulated through the capacitor circuit before the switching operation is performed. Through this, for example, even under light load conditions, overshooting of the rectified voltage generated by the switching operation is prevented, and the wireless power receiving circuit can be protected.

[0147] According to one embodiment, the operation of applying a second switching setting to a load may include connecting the load (e.g., the first load (710) and / or the second load (720) of FIG. 7) to a wireless power receiving circuit through the control of a processor (e.g., control of the value of the load).

[0148] According to one embodiment, the first charging path may include a load configured to be optionally connected to a wireless power receiving circuit. According to one embodiment, the electronic device may disconnect the load from the wireless power receiving circuit, at least temporarily, while the battery is being charged through the first charging path. The electronic device may connect the load to the wireless power receiving circuit through the control of a processor as at least part of the first switching operation. This allows light load conditions to be mitigated (e.g., the value of the battery charging current (Iout) increases by about 100mA). Thus, the wireless power receiving circuit can be protected by preventing overshooting of the rectified voltage that occurs when the switching operation is performed, for example, under a light load condition.

[0149] According to one embodiment, the operation of applying a second switching setting to the headroom for the adjustment circuit may include the operation of setting the headroom for the adjustment circuit to a second headroom value that is smaller (e.g., 700mV smaller) than the first headroom value set prior to the first switching operation.

[0150] According to one embodiment, the first charging path may include a regulating circuit (e.g., the regulating circuit (610) of FIG. 6 and 7) connected to a wireless power receiving circuit. While the battery is being charged through the first charging path, the electronic device may set the headroom for the regulating circuit to a first headroom value (e.g., 800 mV) at least temporarily. As at least part of the first switching operation, the electronic device may set the headroom to a second headroom value (e.g., 100 mV) that is smaller than the first headroom value. This prevents overshooting of the rectified voltage generated by the switching operation, even under light load, for example, thereby protecting the wireless power receiving circuit.

[0151] According to one embodiment, in operation 922, the electronic device may set the output current (e.g., battery charging current (Iout)) to a level lower than or equal to a first reference current as at least part of the first switching operation. For example, the electronic device may set the output current to approximately 0 mA as at least part of the first switching operation. Operation 922 may be performed after operation 921. Meanwhile, for example, if operation 922 is performed without performing operation 921 under light load conditions and the battery charging current (Iout) is set to approximately 0 mA, the voltage gain may increase significantly due to the switching operation for in-band communication, causing an overshoot of the rectified voltage (Vrect) (e.g., shooting to approximately 24 V or higher). In this case, the wireless power receiving circuit may stop charging through its self-protection function, making it difficult to switch the normal charging circuit.

[0152] According to one embodiment, in operation 923, the electronic device can change the first charging circuit to an OFF state and change the second charging circuit to an ON state.

[0153] According to one embodiment, the operation of changing the first charging circuit to an OFF state may include, for example, an operation of disconnecting the first charging circuit from the wireless power receiving circuit. The operation of disconnecting the first charging circuit from the wireless power receiving circuit may, for example, set a mode associated with the first charging circuit to a specified mode, and input terminal of the first charging circuit to which the output voltage of the wireless power receiving circuit is input (e.g., WC of FIG. 4a to 4c). IN It may include an operation to set a switch (e.g., FET) connected to ) to the OFF state.

[0154] According to one embodiment, the operation of changing the second charging circuit to an ON state may include, for example, the operation of connecting the second charging circuit to a wireless power receiving circuit. The operation of connecting the second charging circuit to a wireless power receiving circuit includes, for example, the input terminal of the second charging circuit (e.g., V in FIG. 4a to 4c) to which the output voltage of the wireless power receiving circuit is input. IN2 It may include an operation to set a switch (e.g., FET) connected to ) to the ON state.

[0155] According to one embodiment, in operation 930, the electronic device may perform an operation to finalize the transition of a charging path from a first charging path to a second charging path based at least in part on the completion of a first transition operation. The description of operation 930 of FIG. 9 may include the description of operation 830 of FIG. 8. According to one embodiment, operation 930 may include at least one of operation 931 or operation 932. For example, depending on the embodiment, operation 931 may be omitted. In the present disclosure, the operation to finalize the transition of a charging path from a first charging path to a second charging path may be referred to as a first transition finalization operation, a first transition completion operation, a first charging path transition finalization operation, or a first charging path transition completion operation.

[0156] According to one embodiment, in operation 931, the electronic device can identify whether a specified finishing condition is satisfied. For example, after the first switching operation of operation 920 is completed, the electronic device can check whether the charging current input to the battery or the output current of the charging circuit (e.g., the current (Iout) in FIG. 4a to 4c) is greater than or equal to a second reference current (e.g., 200mA). If the charging current is greater than or equal to the second reference current, the electronic device can identify that the specified finishing condition is satisfied. If the charging current is less than or equal to the second reference current, the electronic device can re-check whether the charging current is greater than or equal to the second reference current at a specified time interval (e.g., 200ms interval) a specified number of times (e.g., 3 times).

[0157] According to one embodiment, in operation 932, the electronic device can restore at least one switching setting to a specified default setting. For example, the electronic device can restore at least one switching setting to a specified default setting based at least in part on the satisfaction of a specified finishing condition. According to one embodiment, when a first switching setting, a second switching setting, and a third switching setting are applied, the electronic device can restore each of the first switching setting, the second switching setting, and the third switching setting to a corresponding default setting. The default setting may be a setting applied to perform a battery charging operation through a first charging path or a second charging path.

[0158] According to one embodiment, the operation of restoring a first switching setting applied to at least one capacitor to a default setting may include, for example, an operation of setting both the first capacitor and the second capacitor to be connected to a charging coil.

[0159] According to one embodiment, the operation of restoring the second switching setting applied to the load to the default setting may include, for example, the operation of disconnecting the load from the wireless power receiving circuit through the control of a processor (e.g., control of the load value).

[0160] According to one embodiment, the operation of restoring the third switching setting applied to the headroom of the adjustment circuit to the basic setting may include, for example, the operation of setting the value of the headroom from the second headroom value (e.g., 100mV) to the first headroom value (e.g., 800mV), which is the basic headroom value.

[0161] Through the operation of restoring to these default settings, the transition of the charging path from the first charging path to the second charging path can be completed, and the battery can be charged normally through the switched second charging path.

[0162] FIG. 10 is a flowchart illustrating the operation of an electronic device switching a charging path from a second charging path to a first charging circuit according to one embodiment of the present disclosure.

[0163] Referring to FIG. 10, according to one embodiment, in operation 1010, an electronic device (e.g., the electronic device (101) of FIG. 1, or the wireless power receiving device (300) of FIG. 3 to 7) can detect the occurrence of a specified event associated with the switching of a charging path while a battery (e.g., the battery (350) of FIG. 3 to 7) is being charged through a second charging path (e.g., the second charging path (CP2) of FIG. 4b) comprising a wireless power receiving circuit (e.g., the power receiving circuit (330) of FIG. 3 to 7) and a second charging circuit (e.g., the second charging circuit (422) of FIG. 4a to 4c). The description of operation 1010 of FIG. 10 may include the description of operation 810 of FIG. 8.

[0164] According to one embodiment, in operation 1020, the electronic device may perform an operation of switching a second charging path to a first charging path based at least partially on an operation of confirming the occurrence of a specified event. Operation 1020 of FIG. 10 may be an example of operation 820 of FIG. 8. According to one embodiment, operation 1020 may include at least one of operation 1021, operation 1022, operation 1023, or operation 1024. In the present disclosure, the operation of switching a second charging path to a first charging path may be referred to as a second switching operation or a second charging path switching operation.

[0165] According to one embodiment, in operation 1021, the electronic device may apply at least one switching setting as at least part of the second switching operation. The at least one switching setting may include a first switching setting applied to at least one capacitor (e.g., the first capacitor (Ca1) and / or the second capacitor (Ca2) of FIG. 5 to 7), a second switching setting applied to a load (e.g., the load (710) of FIG. 7), and / or a third switching setting applied to an adjustment circuit (e.g., the adjustment circuit (610) of FIG. 6 to 7). For a description of the operation of applying the first switching setting, the second switching setting, and the third switching setting, refer to the description of the operation of applying the first switching setting, the second switching setting, and the third switching setting in operation 921 of FIG. 9.

[0166] According to one embodiment, in operation 1022, the electronic device may set the output current (e.g., battery charging current (Iout) of FIG. 4a to 4c) to a first reference current or lower as at least part of the second switching operation. For a description of the operation of setting the output current to a first reference current or lower, refer to the description of operation 922 of FIG. 9.

[0167] According to one embodiment, in operation 1023, the electronic device may set the output voltage (e.g., the battery charging voltage (Vout) of FIG. 4a to 4c) to a reference voltage or lower. Since the driving voltage of the first charging circuit is lower than the driving voltage of the second charging circuit, in order to switch the second charging circuit to the first charging circuit, it is necessary to lower the output voltage to a reference voltage or lower in advance before changing the first charging circuit to the ON state.

[0168] According to one embodiment, in operation 1024, the electronic device can change the second charging circuit to an OFF state and change the first charging circuit to an ON state.

[0169] According to one embodiment, the operation of changing the second charging circuit to an OFF state may include, for example, an operation of disconnecting the second charging circuit from the wireless power receiving circuit. The operation of disconnecting the second charging circuit from the wireless power receiving circuit may include, for example, an input terminal of the second charging circuit (e.g., V in FIG. 4a to 4c) to which the output voltage of the wireless power receiving circuit is input. IN2 It may include an operation to set a switch (e.g., FET) connected to ) to the OFF state.

[0170] According to one embodiment, the operation of changing the first charging circuit to an ON state may include, for example, the operation of connecting the first charging circuit to a wireless power receiving circuit. The operation of connecting the first charging circuit to the wireless power receiving circuit may, for example, set a mode associated with the first charging circuit to a specified mode, and input a terminal of the first charging circuit (e.g., WC of FIG. 4a to 4c) into which the output voltage of the wireless power receiving circuit is input. IN It may include an operation to set a switch (e.g., FET) connected to ) to the ON state.

[0171] According to one embodiment, in operation 1030, the electronic device may perform an operation to finalize the transition of the charging path from the second charging path to the first charging path based at least in part on the completion of the first transition operation. The description of operation 1030 of FIG. 10 may include the description of operation 830 of FIG. 8. According to one embodiment, operation 1030 may include at least one of operation 1031 or operation 1032. For example, depending on the embodiment, operation 1031 may be omitted. In the present disclosure, the operation to finalize the transition of the charging path from the second charging path to the first charging path may be referred to as a second transition finalization operation, a second transition completion operation, a second charging path transition finalization operation, or a second charging path transition completion operation.

[0172] According to one embodiment, in operation 1031, the electronic device can identify whether a specified finishing condition is satisfied. For a description of operation 1031, refer to the description of operation 931 of FIG. 9.

[0173] According to one embodiment, in operation 1032, the electronic device can restore at least one switching setting to a specified default setting. For example, the electronic device can restore at least one switching setting to a specified default setting based at least in part on the satisfaction of a specified finishing condition. Refer to the description of operation 932 of FIG. 9 for the description of operation 1032. Through this operation of restoring to a default setting, the switching of the charging path from the second charging path to the first charging path can be completed, and the battery can be charged normally through the switched first charging path.

[0174] FIG. 11 is a drawing illustrating a change in modulation depth according to a load, according to one embodiment of the present disclosure.

[0175] FIG. 12 is a diagram showing the rectified voltage and battery output voltage during the switching operation of the charging circuit in a state where at least one switching setting is not applied, according to one embodiment of the present disclosure.

[0176] FIG. 13 is a diagram showing a rectified voltage and a battery output voltage while a switching operation of a charging circuit is performed in a state where at least one switching setting is applied, according to one embodiment of the present disclosure.

[0177] Referring to FIG. 11, the modulation depth for rectified voltage (Vrect) modulation can decrease as the load increases. For example, the modulation depth is greatest in the no-load state (e.g., P=0), and decreases as the load increases. The modulation depth can be influenced, for example, by the number of capacitor operations (e.g., Ca or Cb in FIG. 5 to 7). For example, the load changes according to the ON / OFF control of a single capacitor (e.g., Ca in FIG. 5 to 7), and the modulation depth can change accordingly. For example, the modulation depth can be increased by switching the capacitor to the OFF state only when necessary for stabilization. Therefore, to prevent overshooting of the rectified voltage (Vrect) while the switching operation of the charging circuit is performed, it is necessary to alleviate the light load condition by adjusting the modulation depth.

[0178] Referring to FIG. 12, when a switching operation of the charging circuit is performed without at least one switching setting being applied, an overshoot of the rectified voltage (Vrect) (e.g., overshooting to about 24V or higher) may occur. Such an overshoot of the rectified voltage (Vrect) may occur, for example, during a switching operation for in-band communication under light load conditions. As such, when at least one switching setting is not applied, the wireless charging operation is interrupted due to the overshoot of the rectified voltage (Vrect), and thus, a seamless switching of the wireless charging path may not be achieved.

[0179] Referring to FIG. 13, when a switching operation of the charging circuit is performed while at least one switching setting is applied, overshooting of the rectified voltage (Vrect) (e.g., overshooting to about 24V or higher) can be prevented. For example, even under a light load condition, the rectified voltage (Vrect) can be maintained at about 16V or lower, as exemplified in FIG. 13. In this way, when at least one switching setting is applied, overshooting of the rectified voltage (Vrect) is prevented, and a seamless switching of the charging path for wireless charging can be achieved.

[0180] FIG. 14 is a block diagram of a power circuit and a battery of an electronic device for receiving power outside the electronic device and / or transmitting power outside the electronic device, according to one embodiment of the present disclosure.

[0181] Referring to FIG. 14, an electronic device (1401) according to one embodiment (e.g., electronic device (101) of FIG. 1, wireless power transmission device (200) of FIG. 2, or wireless power receiving device (300) of FIG. 3) may include a battery (1489), a power circuit (1410), a communication circuit (1420), a control circuit (1430), and / or a wired interface (1440).

[0182] A battery (1489) (e.g., the battery (350) of FIG. 3 to 7) may include, for example, a battery protection circuit module. The battery protection circuit may perform various functions (e.g., a pre-shutdown function) to prevent performance degradation or burnout of the battery (1489). The battery protection circuit may be implemented, additionally or alternatively, as at least part of a battery management system for performing cell balancing, measuring the remaining charge of the battery (1489), measuring the number of charge / discharge cycles, measuring the temperature, or measuring the voltage. According to one embodiment, at least part of the usage status information or charge status information of the battery (1489) may be determined using a fuel gauge IC (integrated circuit), a power circuit (1410), or a sensor module (e.g., a temperature sensor).

[0183] According to one embodiment, a power circuit (1410) (e.g., power receiving circuit (330) of FIG. 3 to 7) may include at least one circuit supporting wired charging that charges a battery (1489) using power input from an external electronic device (e.g., a travel adapter) through a wired interface (1440), and / or at least one circuit supporting wireless charging that charges a battery (1489) using power input from an external electronic device (e.g., a wireless charging pad) through a conductive pattern (e.g., a coil) (1419).

[0184] According to one embodiment, at least one circuit supporting wired charging may include a circuit configured to charge a battery (1489) using power input from an external electronic device (e.g., TA) and / or a circuit configured to generate a specified voltage using the voltage of the battery (1489) and transmit power based on the specified voltage to an external electronic device through a wired interface (1440) (e.g., USB interface) (e.g., interface (177) of FIG. 1).

[0185] According to one embodiment, at least one circuit supporting wireless charging may include a circuit configured to receive power from an external electronic device through a conductive pattern (1419) (e.g., a charging coil (331) of FIG. 4a through 7) and to charge a battery (1489) using the received power (or, rectified, converted, and / or regulated power) and / or a circuit configured to convert the voltage of power received from the battery (1489) or an external electronic device (e.g., TA) to have a specified voltage value, convert the current characteristics of the power having the specified voltage value from DC (direct current) to AC (alternating current), and transmit wirelessly through the conductive pattern (1419).

[0186] According to one embodiment, the power circuit (1410) can simultaneously perform the operation of charging the battery (1489) and the operation of transmitting power to an external electronic device. For example, the charging circuit (1418) may include a plurality of charging circuits. At least one of the plurality of charging circuits may receive power from an external electronic device (e.g., TA) through a wired interface (1440) and charge the battery (1489) using the received power. At least one of the plurality of charging circuits may transmit the power charged in the battery (1489) to a transmission / reception circuit (1413). The transmission / reception circuit (1413) may transmit the power of the battery (1489) received from the charging circuit (1418) to an external electronic device (e.g., a smartphone, or a wireless earphone cradle) through a conductive pattern (1419). According to one embodiment, a wireless power transmission method using magnetic field induction coupling, resonant coupling, or a combination thereof may be used for wireless charging.

[0187] According to one embodiment, the power circuit (1410) may include a matching circuit (1411), a transmitting and receiving circuit (1413), an adjustment circuit (1415), a switching circuit (1417), and / or a charging circuit (1418).

[0188] According to one embodiment, the matching circuit (1411) may be configured to minimize return loss of power when transmitting power to an external electronic device or receiving power from an external electronic device through the conductive pattern (1419). For example, the matching circuit (1411) may be inserted into the line between the conductive pattern (1419) and the transmitting / receiving circuit (1413) for impedance matching.

[0189] According to one embodiment, the transmitting and receiving circuit (1413) may be configured to convert the current of a power signal from alternating current to direct current when receiving power through the conductive pattern (1419). For example, the transmitting and receiving circuit (1413) may include a rectifier circuit (e.g., the rectifier circuit (510) of FIGS. 5 to 7). The transmitting and receiving circuit (1413) may be configured to convert the current of a power signal from direct current to alternating current when transmitting power through the conductive pattern (1419). For example, the transmitting and receiving circuit (1413) may include an inverter circuit. The regulating circuit (1415) (e.g., the regulating circuit (610) of FIGS. 6 to 7) is configured to regulate the charging voltage and may include, for example, a linear regulator (e.g., a low dropout LDO).

[0190] According to one embodiment, the switching circuit (1417) may include at least one switch (e.g., including at least one switching circuit) for controlling power output to a device (e.g., an OTG (on-the-go) device) connected via a wired interface (1440) or a wired power receiving device and power input from a wired charging device. According to one embodiment, the switching circuit (1417) may further include at least one switch (e.g., including at least one switching circuit) for controlling a receiving function for receiving power wirelessly from an external electronic device via a conductive pattern (1419) and / or a transmitting function for transmitting power wirelessly via the conductive pattern (1419) based on the battery (1489) voltage or power input from an external electronic device (e.g., TA). According to one embodiment, the transmitting and receiving circuit (1413) may be implemented as a full-bridge inverter or a half-bridge inverter, but the present disclosure is not limited thereto and may be modified in various forms.

[0191] According to one embodiment, a charging circuit (1418) (e.g., the first charging circuit (421) and / or the second charging circuit (422) of FIG. 4a through 4c) is electrically connected to a switching circuit (1417) and can adjust the voltage and / or current of power input via wired charging or wireless charging. For example, the charging circuit (1418) can charge a battery (1489) by adjusting the voltage and / or current of power input through the switching circuit (1417). According to one embodiment, the charging circuit (1418) may include a switching charger (e.g., a DC / DC converter) comprising a buck-boost converter (not shown) and a charging controller (not shown). According to one embodiment, the charging circuit (1418) may include a direct charger that supports a switched capacitor divider type of direct charging (e.g., "DC charging"). The direct charger may include an N:1 voltage divider that lowers the input voltage to 1 / N (where N is a positive integer) and increases the input current by N times.

[0192] According to one embodiment, a communication circuit (1420) (e.g., the communication circuit (360) of FIG. 3) is a circuit for communication between a transmitter and a receiver during wireless charging and may include at least one of a first communication circuit (1421) or a second communication circuit (1423). The first communication circuit (1421) (e.g., the capacitor circuit of FIG. 5 to 7) may perform communication by carrying information on the power itself transmitted through a conductive pattern (1419), for example (in-band communication). The first communication circuit (1421) may communicate with an external electronic device using at least one modulation technique among a frequency shift keying (FSK) modulation technique that carries information on the frequency of the power during wireless power transmission and an amplitude shift keying (ASK) modulation technique that carries information on the amplitude of the power during wireless power reception. The first communication circuit (1421) is electrically connected between the conductive pattern (1419) and the transceiver circuit (1413) to perform FSK or ASK communication. The second communication circuit (1423) can communicate with an external electronic device using a frequency in a different band from the frequency of wireless power through the conductive pattern (1419) (out-of-band communication). For example, the second communication circuit (1423) can communicate with an external electronic device using any one of various short-range communication methods such as Bluetooth, BLE (Bluetooth low energy), Wi-Fi, and / or NFC (near field communication).Data transmitted to and received from an external electronic device via a communication circuit (1420) may include information related to charging (e.g., rectified voltage, conductivity pattern (1419), or current information flowing through a transmission / reception circuit (1413) (e.g., current value of a power signal transmitted externally via a coil (1419) or current value of a power signal received externally via a coil (1419)), various packets, and / or messages for configuration). For example, according to the wireless power consortium (WPC) standard, wireless charging operations may include ping operations, identification & configuration operations, and power transfer operations. A ping operation may include an operation in which an electronic device (1401) checks whether an object near a power supply (e.g., an object placed on a wireless charging pad) is an electronic device capable of communicating for power delivery (PD). As an example of a ping operation, an electronic device (1401) (e.g., control circuit (1430)) may receive a data signal (e.g., digital ping signal or wakeup signal) from a power supply device through a communication circuit (1420) (e.g., first communication circuit (1421)). In response to the reception of the data signal, the control circuit (1430) may transmit a response signal (e.g., SSP (signal strength packet)) to the power supply device through the communication circuit (1420). Based on the reception of the response signal, the power supply device may recognize that a nearby object is the electronic device (1401). An acknowledgment & configuration operation may include an operation in which the electronic device (1401) sets the power value of a power signal to be transmitted by the power supply device through data communication with the power supply device using the communication circuit (1420). A power transmission operation may include an operation in which the power supply device transmits a power signal having the power value set in the acknowledgment & configuration operation to the electronic device (1401).Wireless charging operation may further include an operation to determine a source to transmit power and a sink to receive power through data communication between two electronic devices.

[0193] According to one embodiment, a control circuit (1430) (e.g., processor (310) of FIG. 3) can perform overall control of the power circuit (1410) and generate various messages required for wireless charging and transmit them to the communication circuit (1420). The control circuit (1430) can manage the power supplied to the electronic device (1401) and the power transmitted from the electronic device (1401) via wireless charging. The control circuit (1430) can be implemented, for example, as a power management integrated circuit (PMIC) or at least part of an application processor.

[0194] According to one embodiment, the control circuit (1430) can check charge state information related to the charging of the battery (1489) (e.g., charge / discharge voltage / current, battery life, overvoltage, undervoltage, overcurrent, overcharge, overdischarge, overheating, short circuit, or swelling). For example, the control circuit (1430) can check the signal (voltage or current) at the input or output terminal of the power circuit (1410), the matching circuit (1411), or the transmitting / receiving circuit (1413). The control circuit (1430) can determine the state of the battery (1489) based on at least some of the checked charge state information. If the state information of the battery (1489) is determined to be abnormal, the control circuit (1430) can adjust the charging of the battery (1489) (e.g., adjust the charging current, adjust the charging voltage, or stop charging). According to one embodiment, the electronic device (1401) may include at least one sensor (e.g., a temperature sensor) for checking the charge state of the battery (1489). The control circuit (1430) may check the charge state of the battery (1489) based on data received from the at least one sensor. For example, if the temperature of the battery (1489) being charged is above a certain temperature, the control circuit (1430) may determine that the battery (1489) is in an overheated state and adjust the charging of the battery (1489) (e.g., adjust the charging current, adjust the charging voltage, or stop charging).

[0195] According to one embodiment, a wired interface (1440) can connect an external electronic device (e.g., TA) and an electronic device (1401) through a connector. The wired interface (1440) may include a USB communication module connected to a control circuit (1430) or a processor (e.g., the processor (1420) of FIG. 1) through a designated system interface (e.g., I2C (inter-integrated circuit) or MIPI (mobile industry processor interface)). For example, the TA may communicate with the USB communication module of the electronic device (1401) through a USB terminal. According to one embodiment, the USB communication module may include a communication module for USB PD (power delivery) communication. According to one embodiment, the external electronic device connected to the electronic device (1401) through the wired interface (1440) may be a device that supports a PPS (programmable power supply) function or a device that does not support PPS. For example, a PPS supporting device can adjust the voltage of power output from an external electronic device to the electronic device (1401) based on the control of the control circuit (1430) of the electronic device (1401). A PPS non-supporting device can fix the voltage of the power signal output from the external electronic device to the electronic device (1401).

[0196] According to one embodiment of the present disclosure, an electronic device (300) may include a wired charging terminal (401) configured to be wiredly connected to a first external power transmission circuit. The electronic device (300) may include a wireless power receiving circuit (330) connected to a charging coil (331) configured to be wirelessly connected to a second external power transmission circuit. The wireless power receiving circuit (330) may optionally be connected to a first capacitor (Ca) and a second capacitor (Cb). The electronic device (300) may include one or more electronic components including a processor. The electronic device (300) may include a battery (350). The electronic device (300) may include a first charging circuit (421) electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to distribute power received through the wired charging terminal or the wireless power receiving circuit to the battery and one or more electronic components. The electronic device (300) may include a second charging circuit (422) electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to transfer power received through the wired charging terminal or the wireless power receiving circuit to the battery. The electronic device (300) may include a processor (310).

[0197] According to one embodiment, the processor (310) checks for the occurrence of a specified event while the battery is being charged through one of a charging path (CP1) including the wireless power receiving circuit and the first charging circuit or a second charging path (CP2) including the wireless power receiving circuit and the second charging circuit; and based at least in part on the checking operation, the charging path is configured to switch to another charging path among the first charging path and the second charging path, and the switching operation may include an operation to change the setting of at least one capacitor among the first capacitor or the second capacitor so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation.

[0198] According to one embodiment, the processor (310) may be configured to maintain the connection between the first capacitor and the charging coil and to disconnect the connection between the second capacitor and the charging coil as at least part of the changing operation.

[0199] According to one embodiment, at least one of the first capacitor or the second capacitor is a variable capacitor, and the processor (310) is configured to set the variable capacitor to a first capacitance value at least temporarily while the battery is being charged through the charging path; and as at least part of the changing operation, the variable capacitor may be configured to set the variable capacitor to a second capacitance value different from the first capacitance value.

[0200] According to one embodiment, the second charging path may further include at least one load configured to be optionally connected to the wireless power receiving circuit.

[0201] According to one embodiment, the processor (310) disconnects the load from the wireless power receiving circuit at least temporarily while the battery is being charged through the charging path; and, as at least part of the switching operation, may be configured to connect the load to the wireless power receiving circuit through the control of the processor.

[0202] According to one embodiment, the second charging path further includes a coordination circuit connected to the wireless power receiving circuit; and the processor (310) may be configured to set the headroom for the coordination circuit to a first headroom value at least temporarily while the battery is being charged through the charging path; and, as at least part of the switching operation, to set the headroom to a second headroom value smaller than the first headroom value.

[0203] According to one embodiment, the processor may be configured to restore the setting for the at least one capacitor to a specified default setting based at least in part upon completion of the switching operation.

[0204] According to one embodiment, the processor may be configured to perform the recovery operation based further on the fact that the charging current input to the battery after the switching operation is completed is greater than or equal to a specified threshold.

[0205] According to one embodiment, the first capacitor and the second capacitor may be used to perform modulation on the rectified voltage of the rectified DC power obtained through a rectifier circuit included in the wireless power circuit in order to perform in-band communication.

[0206] According to one embodiment, the checking operation may include an operation to check that a specified event related to a change in the charging path occurs when the battery is in a light load state.

[0207] According to one embodiment of the present disclosure, a method of an electronic device (101;300) comprises: an operation of confirming the occurrence of a specified event while the battery is being charged through one of a charging path (CP1) including the wireless power receiving circuit and the first charging circuit or a second charging path (CP2) including the wireless power receiving circuit and the second charging circuit; and an operation of switching the charging path to another charging path among the first charging path and the second charging path based at least in part on the operation of confirming, wherein the switching operation may include an operation of changing the setting of at least one capacitor among the first capacitor or the second capacitor so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation.

[0208] According to one embodiment, the changing operation may include maintaining the connection between the first capacitor and the charging coil and releasing the connection between the second capacitor and the charging coil.

[0209] According to one embodiment, at least one of the first capacitor or the second capacitor is a variable capacitor; and the method may include an operation of setting the variable capacitor to a first capacitance value at least temporarily while the battery is being charged through the charging path. The changing operation may include an operation of setting the variable capacitor to a second capacitance value different from the first capacitance value.

[0210] According to one embodiment, the second charging path may further include at least one load configured to be optionally connected to the wireless power receiving circuit.

[0211] According to one embodiment, the method includes: an operation of disconnecting the load from the wireless power receiving circuit at least temporarily while the battery is being charged through the charging path, and the switching operation may include: an operation of connecting the load to the wireless power receiving circuit through the control of the processor.

[0212] According to one embodiment, the second charging path further includes a coordination circuit connected to the wireless power receiving circuit; and the method includes: an operation of setting the headroom for the coordination circuit to a first headroom value at least temporarily while the battery is being charged through the charging path, and the switching operation may include: an operation of setting the headroom to a second headroom value smaller than the first headroom value.

[0213] According to one embodiment, the method may include: an operation to restore the setting for the at least one capacitor to a specified default setting based at least in part upon completion of the switching operation.

[0214] According to one embodiment, the method may further include the recovery operation based on the fact that the charging current input to the battery after the switching operation is completed is greater than or equal to a specified threshold.

[0215] According to one embodiment, the first capacitor and the second capacitor may be used to perform modulation on the rectified voltage of the rectified DC power obtained through a rectifier circuit included in the wireless power circuit in order to perform in-band communication.

[0216] According to one embodiment, the checking operation may include an operation to check that a specified event related to a change in the charging path occurs when the battery is in a light load state.

[0217] The embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" each may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as “coupled” or “connected” to another (e.g., 2nd) component, with or without the terms “functionally” or “communicationly,” it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0218] The term “module” as used in the embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0219] One embodiment of the present document may be implemented as software (e.g., program (140) of FIG. 1) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) of FIG. 1 or external memory (138) of FIG. 1) that is readable by a machine (e.g., electronic device (101) of FIG. 1). For example, a processor (e.g., processor (120) of FIG. 1) of the machine (e.g., electronic device (101) of FIG. 1) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily.

[0220] According to one embodiment, the method according to the embodiments disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0221] According to one embodiment, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to one embodiment, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to one embodiment, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

In the electronic device (300), A wired charging terminal (401) configured to be wiredly connected to a first external power transmission circuit; A wireless power receiving circuit (330) connected to a charging coil (331) configured to be wirelessly connected to a second external power transmitting circuit, wherein the wireless power receiving circuit (330) is optionally connected to a first capacitor (Ca) and a second capacitor (Cb); One or more electronic components including a processor; Battery (350); A first charging circuit (421) electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to distribute power received through the wired charging terminal or the wireless power receiving circuit to the battery and the one or more electronic components; A second charging circuit (422) electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to transfer power received through the wired charging terminal or the wireless power receiving circuit to the battery; and It includes a processor (310), and the processor is: Confirming the occurrence of a specified event while the battery is being charged through one of a charging path, which is either a first charging path (CP1) including the wireless power receiving circuit and the first charging circuit or a second charging path (CP2) including the wireless power receiving circuit and the second charging circuit; and An electronic device, wherein, based on at least part of the above-mentioned checking operation, the charging path is configured to switch to another charging path among the first charging path and the second charging path, and the switching operation includes an operation to change the setting of at least one capacitor among the first capacitor or the second capacitor so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation. In paragraph 1, the processor is, An electronic device configured to maintain the connection between the first capacitor and the charging coil and to disconnect the connection between the second capacitor and the charging coil as at least part of the above-mentioned changing operation. In paragraph 1, At least one of the first capacitor or the second capacitor is a variable capacitor; and The above processor is, While the battery is being charged through the charging path, at least temporarily, the variable capacitor is set to a first capacitance value; and An electronic device configured to set the variable capacitor to a second capacitance value different from the first capacitance value as at least part of the above-mentioned changing operation. In paragraph 1, An electronic device comprising at least one load further configured such that the second charging path is optionally connected to the wireless power receiving circuit. In paragraph 4, the processor is, While the battery is being charged through the charging path, at least temporarily, the load is disconnected from the wireless power receiving circuit; and An electronic device configured to connect the load to the wireless power receiving circuit through the control of the processor as at least part of the above switching operation. In paragraph 1, The second charging path further includes a control circuit connected to the wireless power receiving circuit; and The above processor is, While the battery is being charged through the charging path, at least temporarily, the headroom for the adjustment circuit is set to a first headroom value; and An electronic device configured to set the headroom to a second headroom value smaller than the first headroom value as at least part of the above switching operation. In paragraph 1, the processor is, An electronic device configured to restore the setting for at least one capacitor to a specified default setting based on at least part of the completion of the above switching operation. In paragraph 7, the processor is, An electronic device configured to perform the recovery operation based further on the fact that, after the above switching operation is completed, the charging current input to the battery is greater than or equal to a specified threshold. In any one of paragraphs 1 through 8, The first capacitor and the second capacitor are used to perform modulation on the rectified voltage of rectified DC power obtained through a rectifier circuit included in the wireless power circuit to perform in-band communication, in an electronic device. In any one of paragraphs 1 through 9, An electronic device wherein the above-mentioned checking operation includes an operation to check that a specified event related to a change in the charging path occurs when the battery is in a light load state. In the method of the electronic device (101;300), The above electronic device is: A wired charging terminal (401) configured to be wiredly connected to a first external power transmission circuit; A wireless power receiving circuit (330) connected to a charging coil (331) configured to be wirelessly connected to a second external power transmitting circuit, wherein the wireless power receiving circuit (330) is optionally connected to a first capacitor (Ca) and a second capacitor (Cb); One or more electronic components including a processor; Battery (350); A first charging circuit (421) electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to distribute power received through the wired charging terminal or the wireless power receiving circuit to the battery and the one or more electronic components; A second charging circuit (422) electrically connected to the wired charging terminal and the wireless power receiving circuit and configured to transfer power received through the wired charging terminal or the wireless power receiving circuit to the battery; and The method includes a processor (120;310), and the method is: An operation to confirm the occurrence of a specified event while the battery is being charged through one of a charging path, which is either a first charging path (CP1) including the wireless power receiving circuit and the first charging circuit or a second charging path (CP2) including the wireless power receiving circuit and the second charging circuit; and A method comprising, based at least in part on the above-mentioned checking operation, switching the charging path to another charging path among the first charging path and the second charging path, wherein the switching operation includes changing the setting of at least one capacitor among the first capacitor or the second capacitor so that the maximum voltage of the wireless power receiving circuit is lower than before the switching operation. A method according to claim 11, wherein the changing operation includes maintaining the connection between the first capacitor and the charging coil and releasing the connection between the second capacitor and the charging coil. In Paragraph 11, At least one of the first capacitor or the second capacitor is a variable capacitor; and The above method is: While the battery is being charged through the charging path, the operation of setting the variable capacitor to a first capacitance value at least temporarily is included. The above-mentioned changing operation is: A method comprising the operation of setting the variable capacitor to a second capacitance value different from the first capacitance value. In Paragraph 11, A method in which the second charging path further comprises at least one load configured to be optionally connected to the wireless power receiving circuit. In paragraph 14, the above method is: While the battery is being charged through the charging path, the operation of disconnecting the load from the wireless power receiving circuit, at least temporarily, is included. The above switching operation is: A method comprising the operation of connecting the above load to the wireless power receiving circuit through the control of the above processor.

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