Electronic device for charging battery and supplying power to speaker

Abstract

A method for operating an electronic device is provided. The method may comprise the operations of: recognizing that a power supply device is connected to the electronic device through a connector provided in the electronic device while audio is played back; determining, on the basis of the recognition, an input voltage to be supplied from the power supply device; on the basis that the input voltage is greater than or equal to a threshold voltage value, performing a first mode for charging a battery of the electronic device by using power input through a power source terminal of the connector and for playing back the audio; and, on the basis that the input voltage is less than the threshold voltage value, performing a second mode for charging the battery by using the power input through the power source terminal, and for playing back the audio by using the power of the battery.

Description

Electronic devices for charging batteries and powering speakers

[0001] The present disclosure relates to an electronic device for supplying power to a speaker of an electronic device from an external power supply or a battery of the electronic device.

[0002] An electronic device (e.g., a smart phone, a tablet PC) can receive power from another electronic device (a power supply device (e.g., a travel adapter)) via a wired cable (e.g., a USB cable) and charge a battery mounted on the electronic device using the received power. The electronic device can supply power from the battery or power received from the power supply device via the USB cable to a system (in other words, a load circuit) of the electronic device. The system is a general term for electronic components mounted on the electronic device that are driven using the supplied power, and may include, for example, a display, a processor, a speaker, a communication circuit, and a memory. The system can perform a given operation using the supplied power.

[0003] The above information is provided as background information to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art related to the present disclosure.

[0004] In an electronic device, a power conversion circuit (or, alternatively, a charging circuit) can receive power through a power terminal (e.g., a VBUS pin) of a connector mounted on the electronic device. The power conversion circuit can convert and output current and / or voltage values ​​from the power input from the power terminal through the input terminal of the power conversion circuit. A battery and a system can share the output terminal of the power conversion circuit. For example, a battery and a system can receive power from the power conversion circuit through the output terminal. A system (e.g., a speaker) can receive power from a battery through the output terminal.

[0005] The speaker receives power through the output terminal of the power conversion circuit and can use the received power to amplify and reproduce audio signals. Meanwhile, audio signals can be reproduced from the speaker while the battery in the electronic device is being charged through the power conversion circuit.

[0006] A current limiting circuit may be configured between the battery and the output terminal. The current limiting circuit can prevent power from being charged to or discharged from the battery. For example, the current limiting circuit can block the charging path from the output terminal to the battery when the voltage of the output terminal (e.g., the voltage (Vsys) input to the system terminal) exceeds a threshold (e.g., 4.8 V). When the charging path is blocked, a phenomenon in which the system voltage (Vsys) momentarily increases (so-called overshoot) may occur. This overshoot may cause audible noise when an audio signal is played through the speaker. This audible noise can cause irritation to the user and have a negative impact on the user's health.

[0007] In an embodiment of the present disclosure, an electronic device can prevent audible noise during battery charging by supplying power to a speaker through a separate power terminal rather than the terminal that outputs the aforementioned system voltage (Vsys). The technical problem to be solved in the present disclosure is not limited to the technical problem mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention pertains from the description below.

[0008] According to one embodiment, an electronic device includes a speaker module including at least one speaker; a battery module including at least one battery; a connector including a power terminal and a data terminal; a communication circuit connected to the data terminal; a first power conversion circuit including a first terminal connected to the power terminal and a second terminal connected to the battery module, and configured to receive power output from an external power supply device from the power terminal through the first terminal, lower the voltage of the power received through the first terminal by 1 / N times, increase the current by N times, and output the lowered voltage of the power received through the first terminal to the second terminal; a second power conversion circuit including a third terminal connected to the power terminal and a fourth terminal connected to the battery module, and configured to receive power output from the power supply device from the power terminal through the third terminal, adjust the voltage value of the power received through the third terminal, and output the adjusted voltage value of the power to the fourth terminal; and a processor. The second power conversion circuit may further include a fifth terminal connected to a power terminal of an audio amplifier circuit configured in the speaker module. The second power conversion circuit may be configured to output power received through the third terminal to the speaker module through the fifth terminal, or to convert the voltage of power of the battery module received through the fourth terminal and output it to the speaker module through the fifth terminal, based on the control of the processor.The processor may be configured to communicate with the power supply device through the communication circuit to set a voltage value input to the power terminal, control the first power conversion circuit to charge the battery module based on the set voltage value, control the second power conversion circuit to operate in a first mode of outputting power from the power terminal to the speaker module through the fifth terminal based on the set voltage value being equal to or greater than a specified threshold voltage value, and control the second power conversion circuit to operate in a second mode of outputting power from the fourth terminal to the speaker module through the fifth terminal based on the set voltage value being less than the threshold voltage value.

[0009] According to one embodiment, a method of operating an electronic device is provided. The method may include an operation of recognizing that a power supply device is connected to the electronic device through a connector configured in the electronic device while playing audio. The method may include an operation of determining an input voltage to be supplied from the power supply device based on the recognition. The method may include an operation of performing a first mode for charging a battery of the electronic device and playing back the audio using power input through a power terminal of the connector based on the input voltage being equal to or greater than a threshold voltage value. The method may include an operation of performing a second mode for charging the battery using power input through the power terminal and playing back the audio using power of the battery based on the input voltage being less than the threshold voltage value.

[0010] According to embodiments of the present disclosure, an electronic device can prevent audible noise from occurring during battery charging. Furthermore, various other benefits, directly or indirectly identified through this document, may be provided.

[0011] FIG. 1 is a block diagram of an electronic device within a network environment according to various embodiments.

[0012] FIG. 2 is a block diagram of a power receiving device configured to charge a battery and supply power to a system using power received from a power supply device, according to one embodiment.

[0013] FIGS. 3A, 3B and 3C are diagrams illustrating battery charging using a first power conversion circuit and audio playback using a second power conversion circuit according to one embodiment.

[0014] FIG. 4 is a flowchart illustrating battery charging using a first power conversion circuit and audio playback using a second power conversion circuit, according to one embodiment.

[0015] FIG. 5 is a flowchart illustrating battery charging and audio playback according to one embodiment.

[0016] FIG. 6 is a flowchart illustrating battery charging and audio playback according to one embodiment.

[0017] FIG. 7 is a block diagram of a power receiving device configured to charge a battery and supply power to a system using power received from a power supply device, according to one embodiment.

[0018] FIGS. 8A and 8B are diagrams for explaining battery charging using a second power conversion circuit and audio playback using a second power conversion circuit or voltage conversion circuit, according to one embodiment.

[0019] FIG. 9 is a flowchart illustrating battery charging using a second power conversion circuit and audio playback using a second power conversion circuit or voltage conversion circuit according to one embodiment.

[0020] FIG. 10 is a block diagram of a power receiving device configured to charge a battery and supply power to a system using power received from a power supply device, according to one embodiment.

[0021] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings so that those skilled in the art can easily implement the present disclosure. However, the present disclosure may be implemented in various different forms and is not limited to the embodiments described herein. In connection with 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 conciseness.

[0022] FIG. 1 is a block diagram of an electronic device (101) within a network environment (100) according to various embodiments. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with at least one of an electronic device (104) or a server (108) via 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) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0023] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or calculations. According to one embodiment, as at least a part of the data processing or calculations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or a secondary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor)) that can operate independently or together therewith. For example, if the electronic device (101) includes a main processor (121) and a secondary processor (123), the secondary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a specified function. The secondary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0024] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, 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. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can 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 can include multiple artificial neural network layers.The artificial neural network may be one of 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, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0025] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0026] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0027] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0028] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0029] The display module (160) can visually provide information to an external party (e.g., a 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 the device. In 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 a force generated by the touch.

[0030] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0031] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0032] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) with an external electronic device (e.g., the electronic device (102)). In 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.

[0033] The connection terminal (178) may include a connector through which the electronic device (101) may 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).

[0034] A haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. In one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0035] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0036] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least a part of a power management integrated circuit (PMIC).

[0037] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0038] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the 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 operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as 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 can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0039] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0040] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In 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 the first network (198) or the second network (199), may be selected from the plurality of antennas by, for example, the 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. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0041] 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 a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high-frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high-frequency band.

[0042] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0043] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least a part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an 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 process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the 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.

[0044] Hereinafter, for convenience of explanation, the surface of the display (e.g., a flexible display) that is visually exposed to the user may be referred to as the front surface of the electronic device (101). In addition, the surface opposite the front surface may be referred to as the back surface of the electronic device (101). In addition, the surface surrounding the space between the front surface and the back surface may be referred to as the side surface of the electronic device (101). The term “state” may refer to the structural form, posture, shape, or configuration of the electronic device (101) (or, the display, slider, or housing constituting the electronic device (101).

[0045] A bar-type housing structure can be applied to an electronic device (e.g., a smart phone, a tablet PC) (101). For example, the bar-type housing structure can include a plate (or a front cover) forming a front surface of the electronic device (101), a plate (or a rear cover) forming a rear surface of the electronic device (101), and a bezel structure (or a side cover) forming a side surface surrounding the front and the rear surface. A display area of ​​a display can be exposed through the front surface. According to one embodiment, the electronic device (101) can include a connector; at least one battery; and a charging circuit (in other words, a power conversion circuit) configured to charge the battery using power received from an external power supply device through the connector and supply power to a system (e.g., a speaker) of the electronic device (101).

[0046] A foldable housing structure may be applied to an electronic device (e.g., a smart phone, a tablet PC, a notebook PC) (101). For example, the electronic device (101) may have a foldable housing structure that is divided into two housings centered on a folding axis. The first housing may include a first front cover forming a part of the front (a first front), a second rear cover forming a part of the rear (or a second rear), and a first side bezel structure forming a part of the side (or a first side). The second housing may include a second front cover forming another part of the front (or a second front), a second rear cover forming another part of the rear (or a second rear), and a second side bezel structure forming another part of the side (or a second side). A part of a display (e.g., a flexible display) may be disposed in the first housing and another part may be disposed in the second housing. A first display area of ​​the display may be exposed through the first front surface in the first housing. The second display area of ​​the display can be exposed through the second front side of the second housing. The foldable housing structure can be implemented in an in-folding manner in which the first display area and the second display area face each other when the electronic device (101) is in a folded state. Alternatively, the foldable housing structure can be implemented in an out-folding manner in which the first display area and the second display area face each other when the electronic device (101) is in a folded state. The electronic device (101) can further include a sub-display. For example, the flexible display, which is the main display, can be exposed through the entire front side of the electronic device (101), and the sub-display can be disposed in the first housing or the second housing and exposed through the rear side (the first rear side or the second rear side) of the housing.According to one embodiment, the electronic device (101) may include a connector; at least one battery; and a charging circuit (or power conversion circuit) configured to charge the battery and supply power to a system (e.g., a speaker) of the electronic device (101) using power received from an external power supply through the connector. According to one embodiment, the electronic device (101) may include a plurality of batteries. For example, a first battery may be located in a first housing and a second battery may be located in a second housing. The charging circuit may be located in the first housing together with the first battery. The second battery located in the second housing may be connected to the charging circuit located in the first housing via connecting wiring (e.g., a printed circuit board (PCB)).

[0047] A slidable (or rollable) housing structure can be applied to an electronic device (e.g., a smart phone, a tablet PC, a notebook PC) (101). The electronic device (101) can include a slidable housing including a housing (or a first housing) and a slider (or a second housing), a rail structure (e.g., a rail structure by gear engagement between a rack gear and a pinion gear) that allows the slider to be inserted into the housing and the slider to be extracted from the housing, and a rollable display (e.g., a flexible display). The slider can be divided into a portion that can be inserted into the housing (hereinafter, referred to as an inlet portion) and a portion that remains exposed to the outside. When the inlet portion of the slider is completely extracted from the housing in a slide-out state (in other words, a first state, an open state, an extended state, a roll-out state), the entire display (or a majority of the display area) can be exposed to the outside through the front. As the slider's inlet portion is retracted into the housing, the display can also be retracted into the housing. The display can also be divided into a portion that remains exposed to the outside (e.g., a first display area, a first section) and a portion that can be retracted into the housing (e.g., a second display area, a second section, a bendable section). When the entire slider's inlet portion is switched to a slide-in state (in other words, a second state, a closed state, a reduced state, a roll-in state) in which the slider's inlet portion is retracted into the housing, the entire second display area of ​​the display can be retracted into the housing. When switching from a slide-out state to a slide-in state, a part of the display (e.g., a second display area) may be moved to the side and toward the rear without being retracted into the housing.As exemplified above, the electronic device (101) may have a sliding structure in which a portion of the display is retracted into the housing, or a sliding structure in which a portion of the display is moved from the front to the rear. Only a portion exposed through the front of the display may be determined as an activated display area (hereinafter, referred to as an active area) that displays visual information. A portion retracted into the housing or moved to the rear may be determined as an inactive area in which no visual information is displayed. According to one embodiment, the electronic device (101) may include a connector; at least one battery; and a charging circuit (in other words, a power conversion circuit) configured to charge the battery using power received from an external power supply device through the connector and supply power to a system (e.g., a speaker) of the electronic device (101). According to one embodiment, the electronic device (101) may include a plurality of batteries. For example, a first battery may be located in a first housing, and a second battery may be located in a second housing. The charging circuit may be located in the first housing together with the first battery. A second battery located in the second housing may be connected to a charging circuit located in the first housing via connecting wiring (e.g., a printed circuit board (PCB)).

[0048] FIG. 2 is a block diagram of a power receiving device (201) configured to charge a battery and supply power to a system using power received from a power supply device (202), according to one embodiment. The power receiving device (201) may be connected to the power supply device (202) via a cable (e.g., a USB Type-C cable) (203) that supports data communication and power reception.

[0049] Referring to FIG. 2, a power receiving device (201) (e.g., electronic device (101) of FIG. 1) may include a battery module (210), a connector (220), an overvoltage protection circuit (230), a charging circuit (240), a communication circuit (250), a speaker module (270), a memory (288), and a controller (299).

[0050] In the power receiving device (201), the system (204) refers to electronic components that are driven using a power signal received through a charging circuit (240) and / or a power signal received from a battery module (210), and may include a speaker module (270), a memory (288), a controller (or control circuit) (299), a display (e.g., a display module (160) of FIG. 1), and / or a camera (e.g., a camera module (180) of FIG. 1), etc. The battery module (or battery set or battery pack) (210) may include a pair of first batteries (211) and a first current limiting circuit (261) and another pair of second batteries (212) and a second current limiting circuit (262). According to one embodiment, the battery module (210) may further include a third or more batteries and a current limiting circuit paired therewith. According to one embodiment, the power receiving device (201) may include only a pair of batteries and a current limiting circuit (e.g., a first battery (211) and a first current limiting circuit (261)).

[0051] A connector (220) (e.g., a connection terminal (178) of FIG. 1) may include a power terminal (221) for receiving a power signal from a power supply device (202) and a data terminal (222) for data communication with the power supply device (202). For example, the connector (220) may include a socket according to a universal serial bus (USB) Type-C. The socket of the connector (220) may be coupled with a plug of a cable (203). Among the pins of the USB Type-C socket, the VBUS pin may be used as a power terminal (221), and the CC (configuration channel) pin and / or the differential signal pin (DP (D+), DN (D-)) may be used as a data terminal (222).

[0052] An overvoltage protection circuit (230) is connected to a power line connecting a power terminal (221) of a connector (220) and a charging circuit (240) to block overvoltage from flowing into the charging circuit (240) (or lower the voltage input to the charging circuit (240)), thereby preventing damage to electronic components (e.g., the charging circuit (240), the system (204)). For example, the overvoltage protection circuit (230) may include a Zener diode.

[0053] The charging circuit (240) can support constant current (CC) and constant voltage (CV) charging based on the control of the controller (299). For example, while the charging mode is set to the CC mode, the charging circuit (240) can maintain the current of the power signal output from the charging circuit (240) at a constant charging current value set by the controller (299) when the battery voltage is lower than a specified target voltage value. Here, the battery voltage may be a voltage (V1) confirmed at the system terminal (277), which is a point where the current output from the charging circuit (240) can be divided into the system (204) and the battery module (210). Alternatively, the battery voltage may be a voltage difference between the positive (+) pole and the negative (-) pole of the first battery (211). The battery voltage may also be a voltage difference between the positive (+) pole and the negative (-) pole of the second battery (212). The battery voltage may be the voltage (V2) confirmed at the first battery terminal (210a), which is the point where the current output from the charging circuit (240) is input to the first current limiting circuit (261). The target voltage value may refer to the voltage (e.g., 5 V) when the battery module (210) is fully charged. Full charge may refer to the state of charge (SOC) when the battery charge amount reaches 100%, which is the set maximum capacity, without concern of burnout or explosion. The target voltage value may also be a designated voltage (e.g., a voltage corresponding to 90% of the maximum capacity). When the battery voltage reaches the target voltage value (4.5 V), the charging mode may be switched to CV mode. When the battery voltage reaches the target voltage value and the charging mode is switched from CC mode to CV mode, the charging circuit (240) can maintain the battery voltage at the target voltage value by lowering the current value of the power signal output from the charging circuit (240) based on the control of the controller (299).When the current flowing from the charging circuit (240) toward the battery module (210) through the system terminal (277) while the battery module (210) is being charged in CV mode (or, the current flowing from the first battery terminal (210a) toward the first current limiting circuit (261)) decreases to a current value designated for completion of charging (e.g., topoff current value), the charging circuit (240) can complete charging of the battery module (210) by stopping the output of power to the battery module (210) based on the control of the controller (299).

[0054] The charging circuit (240) may include a first power conversion circuit (or, alternatively, a direct charging circuit) (241) and a second power conversion circuit (or, alternatively, a switching charging circuit) (242). The power receiving device (201) may be configured so that the current output from the first power conversion circuit (241) or the second power conversion circuit (242) may be distributed to the battery module (210) and the system (204). According to one embodiment, the current output from the first power conversion circuit (241) or the second power conversion circuit (242) may be divided into the system (204) and the battery module (210) at the system terminal (277). The current may be supplied to the system (204) through the system terminal (277). Additionally, the current may be supplied to the battery module (210) through the system terminal (277).

[0055] The first power conversion circuit (241) includes a first terminal (241a) and a second terminal (241b) through which a power signal is input and output. The first terminal (241a) may be electrically connected to a power terminal (221) of the connector (220). The second terminal (241b) may be electrically connected to a system terminal (277). The second power conversion circuit (242) includes a third terminal (242a) and a fourth terminal (242b) through which a power signal is input and output. Here, “third,” “fourth,” and “fifth” are only prefixes used to distinguish the first power conversion circuit (241) from the terminals (241a, 241b), and do not limit the second power conversion circuit (242) in other aspects. The third terminal (242a) may be electrically connected to the power terminal (221) of the connector (220). The fourth terminal (242b) can be electrically connected to the system terminal (277).

[0056] The first battery (211) and the second battery (212) can be connected in parallel to the system terminal (277) to receive power from the first power conversion circuit (241) or the second power conversion circuit (242). Here, the term “parallel” means that the electrical components are connected to one terminal so that the current output from one terminal (the second terminal (241b)) is distributed to the electrical components (the first battery (211) and the second battery (212)). For example, the anode of the first battery (211) can be connected to the system terminal (277) via the battery switch (QBAT). The anode of the second battery (212) can be connected to the system terminal (277). Unlike the illustration, in some embodiments, the anode of the second battery (212) can also be connected to the system terminal (277) via the battery switch (QBAT). The cathode of the first battery (211) and the cathode of the second battery (212) may be connected to the second battery terminal (210b) of the battery module (210), and the second battery terminal (210b) may be connected to the ground of the power receiving device (201). By the connection configuration as described above, power may be supplied from the charging circuit (240) (e.g., the first power conversion circuit (241) or the second power conversion circuit (241)) and / or the battery module (210) to the system (204). In addition, the battery module (210) may be charged by power output from the first power conversion circuit (241) or the second power conversion circuit (242).

[0057] The positive electrode of the first battery (211) may be connected to the first battery terminal (210a) via the first current limiting circuit (261). The positive electrode of the second battery (212) may be connected to the system terminal (277) via the second current limiting circuit (262). Contrary to the illustration, in some embodiments, the positive electrode of the second battery (212) may be connected to the first battery terminal (210a) rather than the system terminal (277).

[0058] The first current limiting circuit (261) may be configured to prevent power from being charged to or discharged from the first battery (211). For example, the first current limiting circuit (261) may include a first charge prevention switch (261a) and a first discharge prevention switch (261b) connected in series to the positive electrode of the first battery (211). Here, the series means that the electronic components are connected between the two terminals so that the current output from one terminal (e.g., the second terminal (241b) or the fourth terminal (242b)) sequentially passes through several electronic components (the first discharge prevention switch (261b) and the first charge prevention switch (261a)) and is input to another terminal (the positive electrode of the first battery (211)). The first charge prevention switch (261a) may be opened or closed depending on the voltage level of the control signal #1 received from the controller (299). For example, when the voltage of the control signal #1 is at a high level higher than a specified reference value, the first charge prevention switch (261a) is closed, and thus power can be charged to the first battery (211). When the voltage of the control signal #1 is at a low level lower than the reference value, the first charge prevention switch (261a) is opened, and thus power charging to the first battery (211) can be stopped. The first discharge prevention switch (261b) can be opened or closed according to the voltage level of the control signal #2 received from the controller (299). For example, when the voltage of the control signal #2 is at a high level higher than a specified reference value, the first discharge prevention switch (261b) is closed, and thus power can be discharged from the first battery (211) to the system. When the voltage of the control signal #2 is at a low level lower than the reference value, the first discharge prevention switch (261b) is opened, and thus power discharging from the first battery (211) to the system can be stopped.

[0059] The first charge prevention switch (261a) may include a first field effect transistor (FET) and a first diode. The first discharge prevention switch (261b) may include a second FET and a second diode. The source terminal of the first FET may be configured to be connected to the positive electrode of the first battery (211). The drain terminal of the first FET may be configured to be connected to the drain terminal of the second FET. The gate terminal of the first FET may be configured to be connected to the controller (299), so that the first charge prevention switch (261a) may receive the control signal #1 from the controller (299). The source terminal of the second FET may be configured to be connected to the output terminal of the charging circuit (240) (the second terminal (241b), the fourth terminal (242b)) and the system terminal (277). The gate terminal of the second FET is configured to be connected to the controller (299), so that the first discharge prevention switch (261b) can receive the control signal #2 from the controller (299). The first diode can be connected between two terminals (drain terminal, source terminal) of the first FET and configured so that current flows only from the first battery (211) toward the first discharge prevention switch (261b). The second diode can be connected between two terminals (drain terminal, source terminal) of the second FET and configured so that current flows only from the charging circuit (240) toward the first charge prevention switch (261a). According to the above-described configuration, regardless of the state of the first charge prevention switch (261a), when the first discharge prevention switch (261b) is closed, the power of the first battery (211) can be discharged. Regardless of the state of the first discharge prevention switch (261b), when the first charge prevention switch (261a) is closed, power can be charged to the first battery (211).

[0060] The second current limiting circuit (262) may be configured to prevent power from being charged to or discharged from the second battery (212). For example, the second current limiting circuit (262) may include a second charge prevention switch (262a) and a second discharge prevention switch (262b) connected in series to the positive electrode of the second battery (212). The second charge prevention switch (262a) may be opened or closed according to the voltage level of the control signal #3 received from the controller (299). For example, when the voltage of the control signal #3 is at a high level higher than a specified reference value, the second charge prevention switch (262a) is in a closed state, thereby allowing power to be charged to the second battery (212). When the voltage of the control signal #3 is at a low level lower than the reference value, the second charge prevention switch (262a) is in an open state, thereby preventing power from being charged to the second battery (212). The second discharge prevention switch (262b) can be opened or closed according to the voltage level of the control signal #4 received from the controller (299). For example, when the voltage of the control signal #4 is at a high level higher than a specified reference value, the second discharge prevention switch (262b) is closed, and the power of the second battery (212) can be discharged. When the voltage of the control signal #4 is at a low level lower than a specified reference value, the second discharge prevention switch (262b) is opened, and thus the power of the second battery (212) can be prevented from being discharged.

[0061] The second charge prevention switch (262a) may include a third FET and a third diode. The second discharge prevention switch (262b) may include a fourth FET and a fourth diode. The source terminal of the third FET may be configured to be connected to the positive electrode of the second battery (212). The drain terminal of the third FET may be configured to be connected to the drain terminal of the fourth FET. The gate terminal of the third FET may be configured to be connected to the controller (299), thereby allowing the second charge prevention switch (262a) to receive the control signal #3 from the controller (299). The source terminal of the fourth FET may be configured to be connected to the output terminal of the charging circuit (240) (the second terminal (241b), the fourth terminal (242b)) and the system terminal (277). The gate terminal of the fourth FET is configured to be connected to the controller (299), so that the second discharge prevention switch (262b) can receive the control signal #4 from the controller (299). The third diode can be connected between two terminals (drain terminal, source terminal) of the third FET and configured so that current flows only from the second battery (212) toward the second discharge prevention switch (262b). The fourth diode can be connected between two terminals (drain terminal, source terminal) of the fourth FET and configured so that current flows only from the charging circuit (240) toward the second charge prevention switch (262a). According to the above-described configuration, regardless of the state of the second charge prevention switch (262a), when the second discharge prevention switch (262b) is closed, power of the second battery (212) can be discharged. Regardless of the state of the second discharge prevention switch (262b), when the second charge prevention switch (262a) is closed, power can be charged to the second battery (212).

[0062] The first power conversion circuit (241) may be configured to convert the voltage value of the power signal input from the first terminal (241a) into a fixed voltage conversion ratio (the ratio of the voltage value of the output power signal to the voltage value of the input power signal) and output the converted voltage value to the second terminal (241b). The first power conversion circuit (241) may include a circuit (e.g., a switched capacitor voltage divider (SCVD)) configured so that the ratio of the output power to the input power is '1'. For example, the first power conversion circuit (241) may convert the voltage value of the power signal received from the power terminal (221) through the first terminal (241a) into N to 1 (e.g., 1 / N times step-down) and convert the current value into 1 to N (e.g., N times increase), and output the power signal to the system terminal (277) through the second terminal (241b).

[0063] According to one embodiment, the first power conversion circuit (241) may include a plurality of switches (e.g., metal oxide semiconductor field effect transistors (MOSFETs)) QA1, QA2, QA3, QA4, and QA5 and a capacitor (273). The switches QA1, QA2, QA3, QA4, and QA5 may be configured to be connected in series from a first terminal (241a) to a ground of the power receiving device (201). The switch QA5 may be connected to the first terminal (241a), and the switches QA1, QA2, QA3, and QA4 may be configured to be connected to the first terminal (241a) via the switch QA5. One end of the capacitor (273) may be configured to be connected between the switches QA1 and QA2. The other end of the capacitor (273) may be configured to be connected between the switches QA3 and QA4. The second terminal (241b) can be configured to be connected between QA2 and QA3.

[0064] The controller (299) can set the switch QA5 to a closed state when supplying power to the system (204) and the battery module (210) using the first power conversion circuit (241), and can set QA5 to an open state when supplying power to the system (204) and the battery module (210) using the second power conversion circuit (242). The controller (299) can adjust the ratio of the output voltage to the input voltage (hereinafter, voltage conversion ratio) by controlling the switching states of QA1, QA2, QA3, and QA4.

[0065] According to one embodiment, while QA1 and QA3 are in a closed (or turned on) state and QA2 and QA4 are in an open (or turned off) state (hereinafter, a first switching state), a power signal input to the first terminal (241a) may pass through QA1 and be charged in the capacitor (273). The power signal may be output from the capacitor (273) to the second terminal (241b) via QA3. Accordingly, a current path in which the power signal flows in the order of QA1, the capacitor (273), QA3, and the second terminal (241b) may be formed on the first power conversion circuit (241). When in the first switching state, voltage distribution is performed by the first capacitor (345), so that the relationship "Vout = Vin ? Vc = Vin / 2" may be established. Here, Vin is the input voltage of the power signal flowing into the first terminal (241a), Vc is the voltage of the capacitor (273), and Vout is the voltage output from the second terminal (241b).

[0066] According to one embodiment, while QA1 and QA3 are open and QA2 and QA4 are closed (hereinafter, referred to as a second switching state), a power signal charged in the capacitor (273) can be output to the second terminal (241b) via QA2. Accordingly, a current path in which the power signal flows in the order of QA4, the capacitor (273), QA2, and the second terminal (241b) can be formed on the first power conversion circuit (241). When in the second switching state, discharge occurs in the first capacitor (345), thereby establishing the relationship “Vout = Vc = Vin / 2.”

[0067] According to one embodiment, the controller (299) may control the first power conversion circuit (241) to periodically alternate between the first switching state and the second switching state. According to this control, the voltage conversion ratio may be 1 / N. For example, the controller (299) may set the ratio of the time in the first switching state (e.g., duty rate or duty cycle) to about 50% compared to one alternating period of changing from the first switching state to the second switching state, and may control the first power conversion circuit (340) to periodically alternate between the first switching state and the second switching state at a switching frequency that determines the alternating period, in accordance with the resonant frequency of the first power conversion circuit (241). Accordingly, power with a voltage that is halved and a current that is doubled may be output from the first power conversion circuit (241) to the system terminal (277).

[0068] The second power conversion circuit (242) can convert the voltage value and / or current value of the power signal input from the third terminal (242a) and output it to the fourth terminal (242b). For example, the second power conversion circuit (242) can step down or boost the voltage value of the power signal received from the power terminal (221) through the third terminal (242a) and output the power signal to the system terminal (277) through the fourth terminal (242b).

[0069] According to one embodiment, the second power conversion circuit (242) may operate as a buck converter that lowers the output voltage compared to the input voltage and outputs a power signal having the lowered output voltage to the system terminal (277), and may operate as a boost converter that raises the output voltage compared to the input voltage and outputs a power signal having the increased output voltage to the system terminal (277).

[0070] According to one embodiment, the second power conversion circuit (242) may include a plurality of switches (e.g., metal oxide semiconductor field effect transistors (MOSFETs)) QB1, QB2, and QB3 and an inductor (293). The switches QB1, QB2, and QB3 may be configured to be connected in series from a third terminal (242a) to the ground of the power receiving device (201). The switch QB3 may be connected to the third terminal (242a), and the switches QB1 and QB2 may be configured to be connected to the third terminal (242a) via the switch QB3. One end of the inductor (293) may be configured to be connected between the switches QB1 and QB2. The other end of the inductor (293) may be configured to be connected to a fourth terminal (242b).

[0071] The controller (299) can set the switch QB3 to a closed state when supplying power to the system (204) and the battery module (210) using the second power conversion circuit (242), and can set QB3 to an open state when supplying power to the system (204) and the battery module (210) using the first power conversion circuit (241). The controller (299) can lower or raise the output voltage relative to the input voltage by controlling the switching states of QB1 and QB2.

[0072] According to one embodiment, under the control of the controller (299), QB1 may be set to a closed state and QB2 to an open state (hereinafter, a third switching state). In the third switching state, electric energy (power signal) introduced into the second power conversion circuit (242) through the third terminal (242a) may pass through the inductor (293) via QB1 and be output to the system terminal (277). In addition, in the third switching state, electric energy may be accumulated in the inductor (293), and accordingly, the level of current flowing from the inductor (293) to the system terminal (277) may gradually increase.

[0073] According to one embodiment, under the control of the controller (299), QB1 may be set to an open state and QB2 may be set to a closed state (hereinafter, a fourth switching state). In the fourth switching state, the electrical energy accumulated in the inductor (293) may be output to the system terminal (277). That is, as the electrical energy is discharged toward the system terminal (277), the level of the current flowing from the inductor (293) to the system terminal (277) may gradually decrease.

[0074] According to one embodiment, the controller (299) can control the second power conversion circuit (242) to periodically alternate between the third switching state and the fourth switching state. According to this control, the level of current and / or the level of voltage output from the second power conversion circuit (242) to the system terminal (277) can be adjusted. According to one embodiment, the controller (299) can adjust the level of output current and / or the level of output voltage by adjusting the ratio of the time that the third switching state lasts to one alternating cycle of changing from the third switching state to the fourth switching state (e.g., duty rate or duty cycle).

[0075] According to one embodiment, the second power conversion circuit (242) may further include a fifth terminal (or output terminal) (242c). The fifth terminal (242c) may be configured to be connected between QB3 and QB1.

[0076] According to one embodiment, the speaker module (270) is connected to the fifth terminal (242c) and can receive power from the battery module (210) or the power supply device (202) through the fifth terminal (242c). The speaker module (270) can amplify and reproduce an audio signal using the power received through the fifth terminal (242c).

[0077] According to one embodiment, the audio amplification circuit (280) may include a pair of first audio amplification circuits (281) and a first speaker (271) and another pair of second audio amplification circuits (282) and a second speaker (272). The first audio amplification circuit (281) and the second audio amplification circuit (282) may be connected in parallel to the fifth terminal (242c).

[0078] According to one embodiment, the controller (299) can control the second power conversion circuit (242) to supply power from the battery module (210) or the power supply device (202) to the speaker module (270).

[0079] A communication circuit (e.g., a USB controller) (250) can identify the type of an external device connected to a connector (220) based on data received from the external device through a data terminal (222). The communication circuit (250) can transmit identification information indicating the type of the external device to the controller (299). Based on the identification information, the controller (299) can perform an operation of negotiating a source that supplies power and a sink that receives power among two devices (201, 202) by performing communication with the external device according to a power delivery (PD) communication protocol through the communication circuit (250). For example, since the power supply device (202) is recognized as a TA (travel adapter), the power supply device (202) can be determined as a source and the power receiving device (201) can be determined as a sink. After such negotiation, the controller (299) may perform an operation of negotiating the current value and / or voltage value of a power signal to be transmitted from the power supply device (202) to the power receiving device (201) by performing communication with the power supply device (201) through the communication circuit (250) according to a PD communication protocol (e.g., power data objects (PDO) or programmable power supply (PPS)). The controller (299) may control one of the power conversion circuits (241, 242) to output a power signal having a voltage value and a current value determined by the negotiation result. Here, the PPS may include a function that can adjust the voltage or current to a specified unit (e.g., several mA, several mV). The power supply device (202) may be a device that supports the PPS function or a device that does not support the PPS function. For example, the PPS support device can adjust the voltage of power output from the PPS support device to the power receiving device (201) based on the control of the power receiving device (201) (e.g., controller (299)).A device that does not support PPS can fix the voltage of a power signal output from the device that does not support PPS to a power receiving device (201) to a voltage value (e.g., 5 V, 9 V, or 15 V) specified by negotiation.

[0080] According to one embodiment, if the power supply device (202) is identified as a PPS-supporting model, the controller (299) can deactivate the second power conversion circuit (242), activate the first power conversion circuit (241), and supply power to the battery module (210) and the system (204) using the activated first power conversion circuit (241). If the power supply device (202) is identified as a PPS-non-supporting model, the controller (299) can deactivate the first power conversion circuit (241), activate the second power conversion circuit (242), and supply power to the battery module (210) and the system (204) using the activated second power conversion circuit (242). As another example, even if the power supply device (202) is identified as a model that does not support PPS, if it is a model that supports fast charging (e.g., 9 V or 15 V), the second power conversion circuit (242) can be deactivated, the first power conversion circuit (241) can be activated, and power can be supplied to the battery module (210) and the system (204) using the activated first power conversion circuit (241).

[0081] According to one embodiment, the controller (299) may be a component (e.g., a microcontroller unit (MCU)) of a PMIC (e.g., a power management module (188)) or a component (e.g., an application processor) of a processor (e.g., a processor (120)).

[0082] According to one embodiment, at least one of the first power conversion circuit (241), the second power conversion circuit (242), the communication circuit (250), the battery switch (QBAT), and the controller (299) may be a component integrated into a specific chip (e.g., an interface-integrated (IF) PMIC). According to one embodiment, the first current limiting circuit (261) may be omitted from the configuration of the power receiving device (201). Instead of being omitted, charge prevention and / or discharge prevention of the first battery (211) may be performed using the battery switch (QBAT).

[0083] In one embodiment, the battery switch (QBAT) may be omitted from the configuration of the power receiving device (201). With this omission, the first battery (211) may be directly connected to the system terminal (277) via the first current limiting circuit (261).

[0084] According to one embodiment, the power receiving device (201) may have a multi-foldable housing structure. For example, the power receiving device (201) may include a first housing and a second housing rotatably coupled thereto. A first battery (211) and a first current limiting circuit (261) may be disposed in the first housing. A second battery (212) and a second current limiting circuit (262) may be disposed in the second housing.

[0085] According to one embodiment, a first audio amplification circuit (281) and a first speaker (271) may be arranged in the first housing. A second audio amplification circuit (282) and a second speaker (272) may be arranged in the second housing.

[0086] According to various embodiments of the present disclosure, the power receiving device (202) can supply power to the battery module (210) and the system (204) using the first power conversion circuit (241), regardless of whether the power supply device (202) supports PPS. The power receiving device (202) can charge the battery module (210) using the first power conversion circuit (241) and supply power for amplifying an audio signal to the speaker module (270) using the second power conversion circuit (242).

[0087] FIGS. 3A, 3B, and 3C are diagrams for explaining battery charging using a first power conversion circuit (241) and audio playback using a second power conversion circuit (242), according to one embodiment. For ease of understanding, only some of the configurations illustrated in FIG. 2 are illustrated in FIGS. 3A, 3B, and 3C. According to one embodiment, the controller (299) in the power receiving device (201) may be configured to perform the operations to be described with reference to FIGS. 3A, 3B, and 3C. According to one embodiment, when instructions stored in the memory (288) are executed by the controller (299) (e.g., an application processor), the power receiving device (201) may perform the operations to be described with reference to FIGS. 3A, 3B, and 3C.

[0088] Referring to FIG. 3A, the power receiving device (201) can determine that the voltage VBUS applied to the power terminal (220) is lower than a specified first threshold voltage value. The power receiving device (201) can set the first threshold voltage value based on the maximum voltage value of the speaker module (270). For example, the power receiving device (201) can set the first threshold voltage value to a value equal to or lower than the maximum voltage value. The maximum voltage value may refer to a rated voltage value specified for the speaker module (270). Based on the fact that VBUS is lower than the first threshold voltage value, the power receiving device (201) can charge the battery (211, 212) using the first power conversion circuit (241). In addition, the power receiving device (201) can supply power of the battery (211, 212) to the speaker module (270) through the second power conversion circuit (242). For example, when the first threshold voltage value is about 11 V and VBUS is lower than the first threshold voltage value, for example, 5 V, the power receiving device (201) (e.g., the controller (299)) can open QB3 and close QA5 to allow the current flowing into the power receiving device (201) through the power terminal (221) to flow to the first power conversion circuit (241). Accordingly, a first charging path (301) can be formed that connects the power terminal (221) to the first power conversion circuit (241) and the system terminal (277) to the battery (211, 212). While the battery (211, 212) is being charged through the first charging path (301), the power receiving device (201) (e.g., controller (299)) can control QB1 and QB2 to increase the voltage (output voltage) at the fifth terminal (242c) relative to the voltage (input voltage) at the system terminal (277). For example, the power receiving device (201) can boost the output voltage up to the maximum voltage value of the speaker module (270).Accordingly, a first power supply path (311) can be formed from the battery (211, 212) through the second power conversion circuit (242) to the speaker module (270). The speaker module (270) can receive power through the first power supply path (311) and use the received power to amplify and reproduce an audio signal. When VBUS corresponds to the voltage (e.g., 5 V) when the battery (211, 212) is 100% charged, the power receiving device (201) can keep QA1 and QA2 in a closed state and QA3 and QA4 in an open state so that the voltage conversion ratio in the first power conversion circuit (241) becomes 1:1.

[0089] Referring to FIG. 3b, when the first threshold voltage value is lower than, for example, 9 V, the power receiving device (201) (e.g., controller (299)) can open QB3 and close QA5 to allow the current flowing into the power receiving device (201) through the power terminal (221) to flow to the first power conversion circuit (241). Accordingly, a second charging path (302) can be formed that connects the power terminal (221) to the first power conversion circuit (241) and the system terminal (277) to the battery (211, 212). While the battery (211, 212) is charged through the second charging path (302), the power receiving device (201) (e.g., controller (299)) can control QB1 and QB2 to increase the voltage (output voltage) at the fifth terminal (242c) relative to the voltage (input voltage) at the system terminal (277). For example, the power receiving device (201) can boost the output voltage to the maximum voltage value of the speaker module (270). Accordingly, a second power supply path (312) can be formed from the battery (211, 212) to the second power conversion circuit (242) and to the speaker module (270). The speaker module (270) can receive power through the second power supply path (312) and use the received power to amplify and reproduce an audio signal. When VBUS is a voltage corresponding to about twice the target voltage value (e.g., 9 V), the power receiving device (201) (e.g., the controller (299)) can control QA1, QA2, QA3, and QA4 in the first power conversion circuit (241) so that the voltage conversion ratio becomes 2:1.

[0090] Referring to FIG. 3c, when the first threshold voltage value is higher than, for example, 15 V, the power receiving device (201) (e.g., controller (299)) can close both QA5 and QB3 so that the current flowing into the power receiving device (201) through the power terminal (221) is divided into two and flows to the first power conversion circuit (241) and the second power conversion circuit (242). Accordingly, a third charging path (303) can be formed that leads from the power terminal (221) to the first power conversion circuit (241) and the system terminal (277) to the batteries (211, 212). In addition, the power receiving device (201) (e.g., controller (299)) can keep QB3 closed and QB1 and QB2 open. Accordingly, a third power supply path (313) may be formed from the power terminal (221) to the fifth terminal (242c) and to the speaker module (270). The speaker module (270) may receive power through the third power supply path (313) and use the received power to amplify and reproduce an audio signal. When VBUS is a voltage (e.g., 15 V) that is approximately three times the voltage when the battery (211, 212) is 100% charged, the power receiving device (201) (e.g., controller (299)) may control QA1, QA2, QA3, and QA4 in the first power conversion circuit (241) so that the voltage conversion ratio becomes 3:1.

[0091] According to one embodiment, when the power supply device (202) is not connected to the power receiving device (201), the power receiving device (201) (e.g., the controller (299)) can supply power from the battery (211, 212) to the speaker module (270) through the second power conversion circuit (242). For example, the power receiving device (201) (e.g., the controller (299)) can keep QB3 open and, in this state, control QB1 and QB2 to boost the voltage (output voltage) at the fifth terminal (242c) to the maximum voltage value of the speaker module (270). Accordingly, a power supply path (e.g., the first power supply path (311) in FIG. 3A or the second power supply path (312) in FIG. 3B) can be formed from the battery (211, 212) to the speaker module (270) through the second power conversion circuit (242). The speaker module (270) can receive power through the formed power supply path and use the received power to amplify and reproduce an audio signal.

[0092] FIG. 4 is a flowchart illustrating battery charging using a first power conversion circuit (241) and audio playback using a second power conversion circuit (242), according to one embodiment. According to one embodiment, a controller (299) in a power receiving device (201) may be configured to perform the operation of FIG. 4. According to one embodiment, when instructions stored in a memory (288) are executed by a controller (299) (e.g., an application processor), the power receiving device (201) may perform the operation of FIG. 4.

[0093] In operation 410, the power receiving device (201) can recognize that the power supply device (202) is connected to the connector (220) during audio playback.

[0094] In operation 420, the power receiving device (201) can determine the input voltage VBUS to be supplied from the power supply device (202) through the power terminal (220). For example, the power receiving device (201) can perform an operation of identifying the power supply device (202) by performing PD communication with the power supply device (202) through the data terminal (222). The power receiving device (201) can perform an operation of determining (e.g., negotiating) a current value and / or a voltage value of a power signal to be transmitted from the power supply device (202) to the power receiving device (201) based on information of the identified power supply device (202). The information identified by the power receiving device (201) through the PD communication can include information regarding the specifications of the power. For example, the power specification information can include information indicating whether the power supply device (202) is a model that supports PPS. The power specification information may include information indicating a programmable voltage range (e.g., 3.3 to 11 V, 3.3 to 16 V, or 3.3 to 21 V) when the power supply (202) is a PPS-supporting model. The power specification information may include information indicating the maximum power that the power supply (202) can output. The power specification information may include a PDO list (e.g., 5 V, 9 V, 15 V) indicating fixed voltage values ​​that the power supply (202) can support when the power supply (202) is a non-PPS-supporting model.

[0095] In operation 430, the power receiving device (201) can check whether VBUS is greater than or equal to a first threshold voltage value (e.g., the maximum voltage value of the speaker module (270)).

[0096] In operation 440, the power receiving device (201) may perform battery charging and audio playback in a first bypass mode based on the VBUS being equal to or greater than a first threshold voltage value. Referring to FIG. 3C for the first bypass mode, the power receiving device (201) (e.g., controller (299)) may control the first power conversion circuit (241) and the second power conversion circuit (242) to form a third charging path (303) and a third power supply path (313). In addition, the power receiving device (201) (e.g., controller (299)) may control the first power conversion circuit (241) so that the voltage conversion ratio becomes 3 to 1 (e.g., to output 15 V (VBUS) by lowering it to 5 V).

[0097] In operation 450, the power receiving device (201) may perform battery charging and audio playback in a first boosting mode based on the VBUS being below a first threshold voltage value. As an example of the first boosting mode, referring to FIG. 3A, the power receiving device (201) (e.g., controller (299)) may control the first power conversion circuit (241) and the second power conversion circuit (242) to form a first charging path (301) and a first power supply path (311). In addition, the power receiving device (201) (e.g., controller (299)) may control the first power conversion circuit (241) so that the voltage conversion ratio becomes 1 to 1 (e.g., so as to output 5 V (VBUS)). As another embodiment of the first boosting mode, referring to FIG. 3B, the power receiving device (201) (e.g., controller (299)) can control the first power conversion circuit (241) and the second power conversion circuit (242) to form a second charging path (302) and a second power supply path (312). In addition, the power receiving device (201) (e.g., controller (299)) can control the first power conversion circuit (241) so that the voltage conversion ratio becomes 2 to 1 (e.g., so as to output 9 V (VBUS) by lowering it to 4.5 V).

[0098] FIG. 5 is a flowchart illustrating battery charging and audio playback according to one embodiment. According to one embodiment, a controller (299) in a power receiving device (201) may be configured to perform the operations of FIG. 5. According to one embodiment, instructions stored in a memory (288), when executed by a controller (299) (e.g., an application processor), may cause the power receiving device (201) to perform the operations of FIG. 5.

[0099] In operation 510 (e.g., operation 440), the power receiving device (201) can perform battery charging and audio playback in the first bypass mode.

[0100] In operation 520, the power receiving device (201) can check whether the power of the audio signal output from the audio amplification circuit (281, 282) is less than a specified threshold power value (e.g., 0.8 W). If the output power is greater than the threshold power value, the power receiving device (201) can maintain the first bypass mode.

[0101] In operation 530, the power receiving device (201) may lower the VBUS and perform battery charging and audio playback in the first boosting mode based on the output power being below a threshold power value. For example, the power receiving device (201) may transmit a request to the power supply device (202) via the data terminal (222) to lower the VBUS from, for example, 15 V to 5 V. The power receiving device (201) may perform battery charging and audio playback in the first boosting mode (e.g., see FIG. 3A) based on a response to the request being received from the power supply device (202) via the data terminal (222) (or based on the VBUS being lowered to 5 V).

[0102] According to one embodiment, when audio is played in the first bypass mode rather than the first boosting mode, power can be used more efficiently in the speaker module (270) (see Table 2 below). Accordingly, the operating mode of the power receiving device (201) for battery charging and audio playback can be switched from the first boosting mode to the first bypass mode. For example, the power receiving device (201) can transmit a request to the power supply device (202) to increase the VBUS to, for example, 15 V based on the output power falling below a threshold power value during the first boosting mode, and perform battery charging and audio playback in the first bypass mode.

[0103] FIG. 6 is a flowchart illustrating battery charging and audio playback according to one embodiment. According to one embodiment, a controller (299) in a power receiving device (201) may be configured to perform the operations of FIG. 6. According to one embodiment, instructions stored in a memory (288), when executed by a controller (299) (e.g., an application processor), may cause the power receiving device (201) to perform the operations of FIG. 6.

[0104] In operation 610 (e.g., operation 440), the power receiving device (201) can perform battery charging and audio playback in the first bypass mode.

[0105] In operation 620, the power receiving device (201) can check whether the state of the battery (211, 212) satisfies the conditions specified for mode switching. For example, if the voltage of the battery (211, 212) is higher than a specified threshold battery voltage value, the mode switching can be performed to prevent overcharging. If the internal temperature of the power receiving device (201) is higher than a specified threshold temperature value, the mode switching can be performed to prevent battery swelling. According to one embodiment, the power receiving device (201) can include a temperature sensor. For example, the temperature sensor can be placed inside or around the battery module (210) to measure the temperature and output data representing the measured temperature to the controller (299). The controller (299) can perform mode switching as a function for controlling the heat generation of the battery (211, 212) based on the temperature data detected through the temperature sensor. According to one embodiment, the controller (299) may measure the voltage of the batteries (211, 212), for example, a potential difference between the system terminal (277) and ground (V1; see FIG. 3), a potential difference between the first battery terminal (210a) and ground (V2; see FIG. 3), a potential difference between the positive and negative electrodes of the first battery (211), or a potential difference between the positive and negative electrodes of the second battery (212). The controller (299) may perform a mode switch as a function for overcharge prevention based on the measured battery voltage being higher than a specified threshold battery voltage value. If the above conditions are not satisfied (e.g., the battery voltage is lower than the threshold voltage value and the internal temperature is lower than the threshold temperature value), the power receiving device (201) may maintain the first bypass mode.

[0106] In operation 630, the power receiving device (201) may lower the VBUS and perform battery charging and audio playback in the first boosting mode based on the above-described conditions being satisfied (e.g., when the battery voltage is equal to or greater than a threshold battery voltage value or the internal temperature is equal to or greater than a threshold temperature value). For example, the power receiving device (201) may transmit a request to the power supply device (202) via the data terminal (222) to lower the VBUS from, for example, 15 V to 5 V. The power receiving device (201) may perform battery charging and audio playback in the first boosting mode (e.g., see FIG. 3A) based on a response to the request being received from the power supply device (202) via the data terminal (222) (or based on the VBUS being lowered to 5 V).

[0107] According to one embodiment, when audio is played in the first bypass mode rather than the first boosting mode, power can be used more efficiently in the speaker module (270) (see Table 2 below). Accordingly, the operating mode of the power receiving device (201) for battery charging and audio playback can be switched from the first boosting mode to the first bypass mode. For example, the power receiving device (201) can transmit a request to the power supply device (202) to increase VBUS to, for example, 15 V, based on the internal temperature being below a threshold temperature value, the battery voltage being below a threshold battery voltage value, and the output power of the audio signal from the amplifier being below a threshold power value while performing the first boosting mode, and can perform battery charging and audio playback in the first bypass mode.

[0108] FIG. 7 is a block diagram of a power receiving device (201) configured to charge a battery and supply power to a system using power received from a power supply device (202), according to one embodiment. Among the components illustrated in FIG. 2, the same components are omitted and other components are illustrated in FIG. 7. Referring to FIG. 7, the power receiving device (201) may include a battery module (210), a power terminal (221), a second power conversion circuit (242), a speaker module (270), a controller (299), a first switch (710), a second switch (720), and a voltage conversion circuit (or, boosting circuit) (730).

[0109] The first audio amplification circuit (281) and the second audio amplification circuit (282) can be connected in parallel to the fifth terminal (242c) through the first switch (710).

[0110] The first audio amplification circuit (281) and the second audio amplification circuit (282) may be connected in parallel to the output terminal (731) of the voltage conversion circuit (730). A second switch (720) may be placed between the system terminal (277) and the input terminal (732) of the voltage conversion circuit (730).

[0111] The voltage conversion circuit (730) may include a plurality of switches (e.g., MOSFETs (metal oxide semiconductor field effect transistors)) QC1 and QC2 and an inductor (740). The switches QC1 and QC2 may be configured to be connected in series from an input terminal (732) to the ground of the power receiving device (201). One end of the inductor (740) may be configured to be connected between the switches QC1 and QC2. The other end of the inductor (740) may be configured to be connected to an output terminal (731).

[0112] According to one embodiment, the controller (299) may open the second switch (720) and close the first switch (710) when supplying power to the speaker module (270) using the second power conversion circuit (242).

[0113] According to one embodiment, the controller (299) can close the second switch (720) and open the first switch (710) when supplying power to the speaker module (270) using the voltage conversion circuit (730). The controller (299) can lower or raise the output voltage output to the output terminal (731) compared to the input voltage input to the input terminal (732) by controlling the switching states of QB1 and QB2 when supplying power to the speaker module (270) using the voltage conversion circuit (730).

[0114] According to one embodiment, under the control of the controller (299), QC1 may be set to a closed state and QC2 to an open state (hereinafter, a fifth switching state). In the fifth switching state, electrical energy (power signal) introduced into the voltage conversion circuit (730) through the input terminal (732) may pass through the inductor (740) via QC1 and be output to the audio module (270). In addition, in the fifth switching state, electrical energy may be accumulated in the inductor (740), and accordingly, the level of current flowing from the inductor (740) to the audio module (270) may gradually increase.

[0115] According to one embodiment, under the control of the controller (299), QC1 may be set to an open state and QC2 may be set to a closed state (hereinafter, a sixth switching state). When in the sixth switching state, the electrical energy accumulated in the inductor (740) may be output to the speaker module (270). That is, as the electrical energy is discharged toward the speaker module (270), the level of the current flowing from the inductor (740) to the speaker module (270) may gradually decrease.

[0116] According to one embodiment, the controller (299) can control the voltage conversion circuit (730) to periodically alternate between the fifth switching state and the sixth switching state. According to this control, the level of current and / or the level of voltage output from the voltage conversion circuit (730) to the speaker module (270) can be adjusted. According to one embodiment, the controller (299) can adjust the level of output current and / or the level of output voltage by adjusting the ratio of the time that the fifth switching state lasts to one alternating cycle of changing from the fifth switching state to the sixth switching state (e.g., duty rate or duty cycle).

[0117] According to one embodiment, the power receiving device (202) can charge the battery module (210) using the second power conversion circuit (242). During battery charging, the power receiving device (202) can supply power for amplifying an audio signal to the speaker module (270) using the second power conversion circuit (242) or the voltage conversion circuit (730).

[0118] FIGS. 8A and 8B are diagrams illustrating battery charging using a second power conversion circuit (242) and audio playback using the second power conversion circuit (242) or the voltage conversion circuit (730) according to one embodiment. For ease of understanding, only some of the configurations illustrated in FIG. 7 are illustrated in FIGS. 8A and 8B.

[0119] Referring to FIG. 8A, the power receiving device (201) can determine that the voltage VBUS applied to the power terminal (220) is lower than a designated second threshold voltage value. Here, the second threshold voltage value may be set to, for example, about 9 V as a standard for fast charging (or rapid charging) of the battery. Based on the fact that VBUS is lower than the second threshold voltage value (for example, about 5 V), the power receiving device (201) can charge the battery (211, 212) using the second power conversion circuit (242). In addition, the power receiving device (201) can supply power of the battery (211, 212) to the speaker module (270) using the voltage conversion circuit (730). The power receiving device (201) (e.g., controller (299)) can close QB3 to allow the current flowing into the power receiving device (201) through the power terminal (221) to flow to the second power conversion circuit (242). If the power receiving device (201) is a device including the first power conversion circuit (241), the power receiving device (201) can open QA5 (see FIG. 3). Accordingly, a fourth charging path (804) can be formed from the power terminal (221) to the second power conversion circuit (242) and the system terminal (277) to the batteries (211, 212). While the battery (211, 212) is being charged through the fourth charging path (804), the power receiving device (201) (e.g., controller (299)) can control QB1 and QB2 to increase or decrease the voltage (output voltage) at the fourth terminal (242b) relative to the voltage (input voltage) at the third terminal (242a). Meanwhile, the power receiving device (201) (e.g., controller (299)) can open the first switch (710) and close the second switch (720). Accordingly, a fourth power supply path (814) can be formed from the battery (211, 212) through the voltage conversion circuit (730) to the speaker module (270).The power receiving device (201) (e.g., controller (299)) can control QC1 and QC2 to adjust the voltage (output voltage) at the output terminal (731) relative to the voltage (input voltage) at the input terminal (732). For example, the power receiving device (201) can boost the output voltage to the maximum voltage value (e.g., 11 V) of the speaker module (270). The speaker module (270) can receive power through the fourth power supply path (814) and use the received power to amplify and reproduce an audio signal.

[0120] Referring to FIG. 8B, the power receiving device (201) can determine that the voltage VBUS applied to the power terminal (220) is equal to or greater than a designated second threshold voltage value (e.g., approximately 9 V). Based on the VBUS being equal to or greater than the second threshold voltage value, the power receiving device (201) can charge the battery (211, 212) and supply power to the speaker module (270) using the second power conversion circuit (242). The power receiving device (201) (e.g., the controller (299)) can close QB3 to allow the current flowing into the power receiving device (201) through the power terminal (221) to flow to the second power conversion circuit (242). If the power receiving device (201) includes the first power conversion circuit (241), the power receiving device (201) can open QA5 (see FIG. 3). Accordingly, a fifth charging path (805) may be formed from the power terminal (221) through the second power conversion circuit (242) and the system terminal (277) to the battery (211, 212). The power receiving device (201) (e.g., the controller (299)) may close the first switch (710) and open the second switch (720). Accordingly, a fifth power supply path (815) may be formed from the power terminal (221) through the second power conversion circuit (242) and the first switch (710) to the speaker module (270). The speaker module (270) may receive power through the fifth power supply path (815) and use the received power to amplify and reproduce an audio signal.

[0121] FIG. 9 is a flowchart illustrating battery charging using a second power conversion circuit (242) and audio playback using the second power conversion circuit (242) or the voltage conversion circuit (730) according to one embodiment. According to one embodiment, a controller (299) in a power receiving device (201) may be configured to perform the operation of FIG. 9. According to one embodiment, when instructions stored in a memory (288) are executed by a controller (299) (e.g., an application processor), the power receiving device (201) may perform the operation of FIG. 9.

[0122] In operation 910, the power receiving device (201) can recognize that the power supply device (202) is connected to the connector (220) during audio playback.

[0123] In operation 920, the power receiving device (201) can determine the input voltage VBUS to be supplied from the power supply device (202) through the power terminal (220). For example, the power receiving device (201) can perform an operation of identifying the power supply device (202) by performing PD communication with the power supply device (202) through the data terminal (222). The power receiving device (201) may perform an operation of determining (e.g., negotiating) a current value and / or voltage value of a power signal to be transmitted from the power supply device (202) to the power receiving device (201) based on information of the identified power supply device (202) (e.g., whether PPS is supported, a range of programmable voltages (e.g., 3.3 to 11 V, 3.3 to 16 V, or 3.3 to 21 V), a maximum power outputtable by the power supply device (202), or a PDO list indicating fixed voltage values ​​supported by the power supply device (202) (e.g., 5 V, 9 V, 15 V)).

[0124] At operation 930, the power receiving device (201) can check whether VBUS is equal to or greater than a second threshold voltage value (e.g., 9 V).

[0125] In operation 940, the power receiving device (201) may perform battery charging and audio playback in a second bypass mode based on the VBUS being equal to or greater than the second threshold voltage value. Referring to FIG. 8B for the second bypass mode, the power receiving device (201) (e.g., the controller (299)) may control the second power conversion circuit (242), the first switch (710), and the second switch (720) to form a fifth charging path (805) and a fifth power supply path (815). The power receiving device (201) (e.g., the controller (299)) may lower or raise the output voltage output to the battery (211, 212) through the fourth terminal (242b) compared to the input voltage input to the third terminal (242a) by controlling the switching states of QB1 and QB2 while power is supplied to the speaker module (270) through the fifth power supply path (815).

[0126] In operation 950, the power receiving device (201) may perform battery charging and audio playback in a second boosting mode based on the VBUS being less than a second threshold voltage value (e.g., approximately 5 V). As an example of the second boosting mode, referring to FIG. 8A, the power receiving device (201) (e.g., the controller (299)) may control the second power conversion circuit (242), the first switch (710), the second switch (720), and the voltage conversion circuit (730) to form a fourth charging path (804) and a fourth power supply path (814). While the batteries (211, 212) are being charged through the fourth charging path (804), the power receiving device (201) (e.g., the controller (299)) may control QC1 and QC2 to adjust the voltage at the output terminal (731) (output voltage) relative to the voltage at the input terminal (732) (input voltage). For example, the power receiving device (201) can boost the output voltage to the maximum voltage value (e.g., 11 V) of the speaker module (270). While power is supplied to the speaker module (270) through the fourth power supply path (814), the power receiving device (201) (e.g., the controller (299)) can lower or raise the output voltage output to the battery (211, 212) through the fourth terminal (242b) compared to the input voltage input to the third terminal (242a) by controlling the switching states of QB1 and QB2.

[0127] While the power receiving device (201) is operating in the second bypass mode, at operation 960, the power receiving device (201) may determine whether the state of the power receiving device (201) satisfies a condition specified for mode switching. For example, the power receiving device (201) may determine whether the power of the audio signal output from the audio amplification circuit (281, 282) is less than a specified threshold power value (e.g., 0.8 W). If the output power is greater than or equal to the threshold power value, the mode switching may be performed. As another example, if the voltage of the batteries (211, 212) is greater than or equal to a threshold battery voltage value, the mode switching may be performed to prevent overcharging. As another example, if the internal temperature of the power receiving device (201) is greater than or equal to a specified threshold temperature value, the mode switching may be performed to prevent battery swelling. According to one embodiment, the power receiving device (201) may include a temperature sensor. For example, a temperature sensor may be placed inside or around a battery module (210) to measure the temperature and output data representing the measured temperature to a controller (299). The controller (299) may perform mode switching as a function for controlling heat generation of the batteries (211, 212) based on the temperature data detected by the temperature sensor. According to one embodiment, the controller (299) may measure the voltage of the batteries (211, 212), for example, a potential difference between a system terminal (277) and ground (V1; see FIG. 3), a potential difference between a first battery terminal (210a) and ground (V2; see FIG. 3), a potential difference between a positive and negative pole of the first battery (211), or a potential difference between a positive and negative pole of the second battery (212). The controller (299) may perform mode switching as a function for preventing overcharge based on the measured battery voltage being higher than a specified threshold battery voltage value.If the above conditions are not satisfied (e.g., the output power is less than the threshold power value, the battery voltage is less than the threshold battery voltage value, and the internal temperature is less than the threshold temperature value), the power receiving device (201) may maintain the second bypass mode.

[0128] At operation 970, the power receiving device (201) may lower VBUS and perform battery charging and audio playback in operation 950, i.e., the second boosting mode, based on the above-described conditions being satisfied (e.g., when the output power is less than or equal to a threshold power value, the battery voltage is greater than or equal to a threshold battery voltage value, or the internal temperature is greater than or equal to a threshold temperature value). For example, the power receiving device (201) may transmit a request to the power supply device (202) via the data terminal (222) to lower VBUS from, for example, 9 V to 5 V. The power receiving device (201) may perform battery charging and audio playback in the second boosting mode based on a response to the request being received from the power supply device (202) via the data terminal (222) (or based on the VBUS being lowered to 5 V).

[0129] According to one embodiment, when audio is played back in the second bypass mode rather than the second boosting mode, power can be used more efficiently in the speaker module (270) (see Table 2 below). Accordingly, the operating mode of the power receiving device (201) for battery charging and audio playback may be switched from the second boosting mode to the second bypass mode. For example, the power receiving device (201) may transmit a request to the power supply device (202) to increase VBUS to, for example, 15 V based on the internal temperature being below a threshold temperature value, the battery voltage being below a threshold battery voltage value, and the output power of the audio signal being below a threshold power value while performing the second boosting mode, and may perform battery charging and audio playback in the second bypass mode.

[0130] FIG. 10 is a block diagram of a power receiving device (201) configured to charge a battery and supply power to a system using power received from a power supply device (202), according to one embodiment. Among the components illustrated in FIG. 2, the same components are omitted and other components are illustrated in FIG. 10. Referring to FIG. 10, the power receiving device (201) may include a battery module (210), a power terminal (221), a second power conversion circuit (242), a speaker module (270), a controller (299), and a voltage conversion circuit (1001). FIG. 11A is a diagram for explaining audio reproduction using the voltage conversion circuit (1001), according to one embodiment. FIG. 11B is a diagram for explaining battery charging using the second power conversion circuit (242) and the voltage conversion circuit (1001), according to one embodiment. For ease of understanding, only some of the components illustrated in FIG. 10 are illustrated in FIGS. 11A and 11B.

[0131] Referring to FIG. 10, a voltage conversion circuit (1001) (e.g., voltage conversion circuit (730) of FIG. 7) may include a first input terminal (1010), a second input terminal (1020), and an output terminal (1030). The first input terminal (1010) may be connected to a fifth terminal (242c) of a second power conversion circuit (242). The second input terminal (1020) may be connected to a system terminal (277). The output terminal (1030) may be connected to a speaker module (270). The second power conversion circuit (242) may adjust a voltage (output voltage) output to a fourth terminal (242b) relative to a voltage (input voltage) input to a third terminal (242a) based on the control of a controller (299). In addition, the second power conversion circuit (242) can divide the current flowing into the third terminal (242a) into the fourth terminal (242b) and the fifth terminal (242c) and output them based on the control of the controller (299). The voltage conversion circuit (1001) can adjust the voltage (output voltage) output from the output terminal (1030) relative to the voltage (input voltage) input to the first input terminal (1010) or the second input terminal (1020) based on the control of the controller (299).

[0132] Referring to FIG. 11A, if the power supply device (202) is not connected to the power terminal (221), the power receiving device (201) may supply power to the speaker module (270) using the voltage conversion circuit (1001). For example, the power receiving device (201) (e.g., the controller (299)) may control the voltage conversion circuit (1001) so that current flows into the second input terminal (1020) and is output through the output terminal (1030). In addition, the power receiving device (201) may deactivate the second power conversion circuit (242) so that current does not leak through the second power conversion circuit (242). For example, the power receiving device (201) may keep QB2 open while audio is being played. Accordingly, a sixth power supply path (1116) may be formed from the battery (211, 212) to the speaker module (270) via the system terminal (277) and the output terminal (1030). While the sixth power supply path (1116) is formed in the power receiving device (201), the power receiving device (201) (e.g., controller (299)) may control the voltage conversion circuit (1001) to adjust the output voltage. For example, the power receiving device (201) may boost the output voltage to the maximum voltage value (e.g., 11 V) of the speaker module (270).

[0133] Referring to FIG. 11B, when the power supply device (202) is connected to the power terminal (221), the power receiving device (201) can charge the battery (211, 212) using the second power conversion circuit (242). For example, the power receiving device (201) (e.g., the controller (299)) can close QB3 to allow the current flowing into the power receiving device (201) through the power terminal (221) to flow to the second power conversion circuit (242). If the power receiving device (201) includes the first power conversion circuit (241), the power receiving device (201) can open QA5 (see FIG. 3). Accordingly, a sixth charging path (1106) can be formed from the power terminal (221) to the battery (211, 212) via the second power conversion circuit (242) and the system terminal (277). While the battery (211, 212) is being charged through the sixth charging path (1106), the power receiving device (201) (e.g., controller (299)) can control QB1 and QB2 to increase or decrease the voltage (output voltage) at the fourth terminal (242b) relative to the voltage (input voltage) at the third terminal (242a).

[0134] Referring to FIG. 11B, the power receiving device (201) can supply power to the speaker module (270) using the second power conversion circuit (242) and the voltage conversion circuit (1001). The power receiving device (201) (e.g., the controller (299)) can control the voltage conversion circuit (1001) so that current flows into the first input terminal (1010) and current does not flow into the second input terminal (102). For example, the voltage conversion circuit (1001) can include a first switch connecting the first input terminal (1010) and the output terminal (1030) and a second switch connecting the second input terminal (102) and the output terminal (1030). The power receiving device (201) can close the first switch and open the second switch. Accordingly, a seventh power supply path (1117) may be formed from the power terminal (221) to the speaker module (270) via the second power conversion circuit (242) and the voltage conversion circuit (1001). The speaker module (270) may receive power through the seventh power supply path (1117) and may use the received power to amplify and reproduce an audio signal. While the seventh power supply path (1117) is formed in the power receiving device (201), the power receiving device (201) (e.g., the controller (299)) may control the voltage conversion circuit (1001) to adjust the output voltage. For example, the power receiving device (201) may boost the output voltage to the maximum voltage value (e.g., 11 V) of the speaker module (270).

[0135] According to one embodiment, the voltage conversion circuit (1001) may be a component integrated into a specific chip (e.g., an interface-integrated (IF) PMIC) together with at least one of a first power conversion circuit (241), a second power conversion circuit (242), a communication circuit (250), a battery switch (QBAT), and a controller (299).

[0136] Table 1 below shows the difference between the power loss (power loss (=I2R)) (I is current, R is resistance) that occurs when power is supplied to the speaker module (270) through the system terminal (277) and the power loss that occurs when power is supplied to the speaker module (270) through the fifth terminal (242c) according to various embodiments of the present document. In Table 1, input power represents the power input to the speaker module (270). In Table 1, “existing” represents the voltage and current input to the speaker module (270) through the system terminal (277). In Table 1, “changed” represents the voltage and current input to the speaker module (270) through the fifth terminal (242c) in bypass mode (e.g., the first bypass mode of FIG. 3c) when VBUS is 15 V. According to Table 1, it can be seen that the existing configuration generates about 14 times more power loss than the changed configuration. In conclusion, according to various embodiments of this document, power waste can be minimized and used efficiently during audio playback.

[0137] Input power [W] Difference between existing and changed power loss Voltage [V] Current [A] Voltage [V] Current [A] 140.25 150.067 14.1 times 641.5 150.48 42 150.533333

[0138] Table 2 below shows the output efficiency of the speaker module (270) by mode. In Table 2, 'Pout' represents the power of the audio signal output from the audio amplification circuit (281, 282). "Boosting mode (VBAT=3.5V)" represents the power efficiency of the speaker module (270) by output power (Pout) when playing audio in boosting mode (e.g., first boosting mode or second boosting mode) when the battery voltage is 3.5V. "Boosting mode (VBAT=4.4V)" represents the power efficiency of the speaker module (270) by output power (Pout) when playing audio in boosting mode (e.g., first boosting mode or second boosting mode) when the battery voltage is 4.4V. “Bypass mode (VBUS=9V)” represents the power efficiency of the speaker module (270) by output power (Pout) when playing audio in bypass mode (e.g., second bypass mode) when VBUS is 9V. “Bypass mode (VBUS=15V)” represents the power efficiency of the speaker module (270) by output power (Pout) when playing audio in bypass mode (e.g., second bypass mode) when VBUS is 15V.

[0139] Referring to Table 2, when the output power (Pout) is 0.8 W or higher, audio playback in bypass mode may be more efficient than audio playback in boosting mode. For example, when the output power (Pout) is 1 W, bypass mode (VBUS=9 V) is about 3% more efficient than boosting mode (VBAT=3.5 V). Also, when the output power (Pout) is 1 W, bypass mode (VBUS=15 V) is about 1% more efficient than boosting mode (VBAT=3.5 V). As can be seen in Table 2, the efficiency difference becomes larger as the output power (Pout) increases. For example, when the output power (Pout) is 4 W, bypass mode (VBUS=9 V) is about 10.3% more efficient than boosting mode (VBAT=3.5 V). Bypass mode (VBUS=15V) is about 9.4% more efficient than boost mode (VBAT=3.5V).

[0140] Pout[W] EfficiencyBoosting mode(VBAT=3.5V)Boosting mode(VBAT=4.4V)Bypass mode(VBUS=9V)Bypass mode(VBUS=15V)0.0017.3%6.8%5.8%6.3%0.0139.8%40.1%37.1%38.2%0.0573.6%74.4%71.4%71.4%0.0778.6%79.2%76.1%76.3%0.182.0%82.2%80.0%80.2%0.1578.4%78.7%73.4%67.3%0.281.8%82.2 %77.4%72.3%0.385.5%86.0%82.0%77.9%0.588.6%87.8%86.2%82.9%0.886.3%90.6%88.8%86.2%186.6%87.6%89.6%87.6%285.8%87.9%91.6%90.2%384.5%86.2%92.3%91.2%482.4%85.2%92.7%91.8%

[0141] According to one embodiment, an electronic device (e.g., a power receiving device (201) of FIG. 2) includes a speaker module including at least one speaker; a battery module including at least one battery; a connector including a power terminal and a data terminal; a communication circuit connected to the data terminal; a first power conversion circuit including a first terminal connected to the power terminal and a second terminal connected to the battery module, and configured to receive power output from an external power supply device from the power terminal through the first terminal, lower the voltage of the power received through the first terminal by 1 / N times, increase the current by N times, and output the lowered voltage of the power received through the first terminal to the second terminal; a second power conversion circuit including a third terminal connected to the power terminal and a fourth terminal (e.g., the fourth terminal (242b) of FIG. 2) connected to the battery module, and configured to receive power output from the power supply device from the power terminal through the third terminal, adjust the voltage value of the power received through the third terminal, and output the adjusted voltage value of the power to the fourth terminal; and a processor (e.g., a controller (299) of FIG. 4). The second power conversion circuit may further include a fifth terminal (e.g., the fifth terminal (242c) of FIG. 2) connected to a power terminal of an audio amplifier circuit configured in the speaker module. The second power conversion circuit may be configured to output power received through the third terminal to the speaker module through the fifth terminal, or to convert the voltage of power of the battery module received through the fourth terminal and output the converted power to the speaker module through the fifth terminal, based on the control of the processor.The processor may be configured to communicate with the power supply device through the communication circuit to set a voltage value input to the power terminal, control the first power conversion circuit to charge the battery module based on the set voltage value, control the second power conversion circuit to operate in a first mode (e.g., a first bypass mode) that outputs power from the power terminal to the speaker module through the fifth terminal based on the set voltage value being equal to or greater than a specified threshold voltage value, and control the second power conversion circuit to operate in a second mode (e.g., a first boosting mode) that outputs power from the fourth terminal to the speaker module through the fifth terminal based on the set voltage value being less than the threshold voltage value.

[0142] The processor may be configured to control the first power conversion circuit to output power received from the power terminal through the first terminal to the second terminal without changing the voltage value, based on the set voltage value being less than the threshold voltage value and corresponding to a designated first voltage value (e.g., 5 V).

[0143] The processor may be configured to lower the voltage of power received from the power terminal through the first terminal by a factor of 1 / 2 and increase the current by a factor of 2 and output it to the second terminal based on the set voltage value being less than the threshold voltage value and corresponding to a designated second voltage value (e.g., 9 V).

[0144] The processor may control the first power conversion circuit to lower the voltage of power received from the power terminal through the first terminal by 1 / 3 and increase the current by 3 times and output it to the second terminal based on the set voltage value being equal to or greater than the threshold voltage value and corresponding to a designated third voltage value (e.g., 15 V).

[0145] The processor can control the second power conversion circuit to switch to the second mode based on the power of an audio signal output from the audio amplifier circuit being less than a threshold power value (e.g., 0.8 W) while the second power conversion circuit is operating in the first mode.

[0146] The processor can control the second power conversion circuit to switch to the second mode based on the state of charge of the battery module or the internal temperature of the electronic device while the second power conversion circuit is operating in the first mode.

[0147] The above battery module may include a first battery and a second battery connected in parallel to the fourth terminal.

[0148] The electronic device may further include a battery switch. The first battery may be connected to the fourth terminal via the battery switch. The second battery may be connected to the fourth terminal without via the battery switch.

[0149] The electronic device may further include a current limiting circuit configured to prevent charging and / or discharging of the second battery. The second battery may be connected to the fourth terminal via the current limiting circuit.

[0150] The electronic device may include a first housing; and a second housing rotatably coupled to the first housing. The first battery may be disposed in the first housing. The second battery may be disposed in the second housing.

[0151] The speaker module may include a pair of first audio amplification circuits and a first speaker; and another pair of second audio amplification circuits and a second speaker. The first audio amplification circuit and the second audio amplification circuit may be connected in parallel to the fifth terminal.

[0152] According to one embodiment, a method of operating an electronic device is provided. The method may include an operation of recognizing that a power supply device is connected to the electronic device through a connector configured in the electronic device while playing audio. The method may include an operation of determining an input voltage to be supplied from the power supply device based on the recognition. The method may include an operation of performing a first mode for charging a battery of the electronic device and playing back the audio using power input through a power terminal of the connector based on the input voltage being equal to or greater than a threshold voltage value. The method may include an operation of performing a second mode for charging the battery using power input through the power terminal and playing back the audio using power of the battery based on the input voltage being less than the threshold voltage value.

[0153] The electronic device may include a first power conversion circuit and a second power conversion circuit. The first power conversion circuit may include a first terminal connected to the power terminal and a second terminal connected to the battery, and may be configured to receive power output by the power supply device from the power terminal through the first terminal, lower the voltage of the power received through the first terminal by 1 / N times, increase the current by N times, and output the power to the second terminal. The second power conversion circuit may include a third terminal connected to the power terminal; a fourth terminal connected to the battery; and a fifth terminal connected to a power terminal of an audio amplifier circuit configured in the speaker, and may be configured to receive power output by the power supply device from the power terminal through the third terminal, adjust the voltage value of the power received through the third terminal, and output the adjusted voltage value of the power to the fourth terminal. An operation of performing the first mode may include an operation of controlling the first power conversion circuit to charge the battery using power input from the power supply device through the power terminal of the connector; And the operation of outputting power input from the power supply device to the speaker through the fifth terminal from the power terminal of the connector may include the operation of performing the second mode: the operation of controlling the first power conversion circuit to charge the battery using the power input from the power supply device through the power terminal of the connector; and the operation of outputting power of the battery to the speaker through the fifth terminal from the fourth terminal.

[0154] The method may further include an operation of switching to the second mode based on the power of an audio signal output from the audio amplification circuit being less than a specified threshold power value while the first mode is being performed.

[0155] The method may further include an operation of switching to the second mode based on the state of charge of the battery or the internal temperature of the electronic device while the first mode is being performed.

[0156] In the above explanation, the prefixes “first,” “second,” and “third” are only used to distinguish between the same names and do not have any special meaning in themselves, such as importance or order.

[0157] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0158] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the 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 the items, unless the context clearly indicates otherwise. In this document, each of the phrases "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" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0159] The term "module" used in various 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. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. In one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0160] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (e.g., a processor (120)) of the machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate 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 executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0161] According to one embodiment, the method according to various embodiments disclosed in this document may be provided as a computer program product. The computer program product may be traded between sellers and buyers 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 may be provided through an application store (e.g., Play Store). TM ) or directly between two user devices (e.g., smart phones), online distribution (e.g., downloading or uploading). In the case of online distribution, at least a portion of the computer program product may be at least temporarily stored or temporarily created in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.

[0162] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component 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

1. In electronic devices, A speaker module comprising at least one speaker; A battery module comprising at least one battery; Connectors including power terminals and data terminals; A communication circuit connected to the above data terminal; A first power conversion circuit including a first terminal connected to the power terminal and a second terminal connected to the battery module, and configured to receive power output from an external power supply device from the power terminal through the first terminal, lower the voltage of the power received through the first terminal by 1 / N times, increase the current by N times, and output the same to the second terminal; A second power conversion circuit including a third terminal connected to the power terminal and a fourth terminal connected to the battery module, configured to receive power output by the power supply device from the power terminal through the third terminal, adjust the voltage value of the power received through the third terminal, and output the adjusted power to the fourth terminal; and Includes a processor, The second power conversion circuit further includes a fifth terminal connected to a power terminal of an audio amplifier circuit configured in the speaker module, The second power conversion circuit is configured to output power received through the third terminal to the speaker module through the fifth terminal or to convert the voltage of power of the battery module received through the fourth terminal and output it to the speaker module through the fifth terminal based on the control of the processor. The above processor, By performing communication with the power supply device through the communication circuit, the voltage value input to the power terminal is set, Based on the set voltage value, controlling the first power conversion circuit to charge the battery module, Controlling the second power conversion circuit to operate in a first mode for outputting power from the power terminal to the speaker module through the fifth terminal based on the set voltage value being greater than or equal to a specified threshold voltage value; An electronic device configured to control the second power conversion circuit to operate in a second mode for outputting power from the fourth terminal to the speaker module through the fifth terminal based on the set voltage value being less than the threshold voltage value.

2. In the first paragraph, the processor is configured to control the first power conversion circuit to output power received from the power terminal through the first terminal to the second terminal without changing the voltage value, based on the set voltage value being less than the threshold voltage value and corresponding to the designated first voltage value.

3. In the first paragraph, the processor, based on the set voltage value being less than the threshold voltage value and corresponding to the designated second voltage value, An electronic device configured to lower the voltage of power received from the power terminal by half and increase the current by twice through the first terminal and output it to the second terminal.

4. In the first paragraph, the processor, based on the set voltage value being equal to or greater than the threshold voltage value and corresponding to the designated third voltage value, An electronic device configured to control the first power conversion circuit to output power received from the power terminal through the first terminal at a voltage lowered by 1 / 3 and a current higher than 3 times to the second terminal.

5. An electronic device according to claim 1, wherein the processor is configured to control the second power conversion circuit to switch to the second mode based on the power of an audio signal output from the audio amplifier circuit being less than a threshold power value while the second power conversion circuit is operating in the first mode.

6. In the first paragraph, the processor is configured to control the second power conversion circuit to switch to the second mode based on the state of charge of the battery module or the internal temperature of the electronic device while the second power conversion circuit is operating in the first mode.

7. In any one of the first to sixth paragraphs, the battery module, An electronic device comprising a first battery and a second battery connected in parallel to the fourth terminal.

8. In the 7th paragraph, further comprising a battery switch, The above first battery is connected to the fourth terminal through the battery switch, The second battery is an electronic device connected to the fourth terminal without going through the battery switch.

9. In the 8th paragraph, further comprising a current limiting circuit configured to prevent charging and / or discharging of the second battery, An electronic device in which the second battery is connected to the fourth terminal through the current limiting circuit.

10. In paragraph 7, a first housing; and further comprising a second housing rotatably coupled to the first housing, The first battery is placed in the first housing, An electronic device wherein the second battery is disposed in the second housing.

11. In any one of paragraphs 1 to 6, The speaker module includes a pair of first audio amplification circuits and a first speaker; and another pair of second audio amplification circuits and a second speaker, An electronic device in which the first audio amplification circuit and the second audio amplification circuit are connected in parallel to the fifth terminal.

12. In a method of operating an electronic device, An action to recognize that a power supply is connected to said electronic device through a connector configured in said electronic device while playing audio; Based on the above recognition, an operation of determining an input voltage to be supplied from the power supply device; An operation of performing a first mode for charging a battery of the electronic device and playing back audio using power input through a power terminal of the connector based on the input voltage being equal to or greater than the threshold voltage value; and A method comprising an operation of performing a second mode for charging the battery using power input through the power terminal and playing the audio using power of the battery, based on the input voltage being less than the threshold voltage value.

13. In paragraph 12, The electronic device includes a first power conversion circuit and a second power conversion circuit, The first power conversion circuit includes a first terminal connected to the power terminal and a second terminal connected to the battery, and is configured to receive power output by the power supply device from the power terminal through the first terminal, lower the voltage of the power received through the first terminal by 1 / N times, increase the current by N times, and output it to the second terminal. The second power conversion circuit includes a third terminal connected to the power terminal; a fourth terminal connected to the battery; and a fifth terminal connected to the power terminal of an audio amplifier circuit configured in the speaker, and is configured to receive power output by the power supply device from the power terminal through the third terminal, adjust the voltage value of the power received through the third terminal, and output it to the fourth terminal. The operation of performing the first mode includes an operation of controlling the first power conversion circuit to charge the battery using power input from the power supply device through the power terminal of the connector; and an operation of outputting the power input from the power supply device to the speaker through the fifth terminal at the power terminal of the connector. A method for performing the second mode, the method comprising: controlling the first power conversion circuit to charge the battery using power input from the power supply device through the power terminal of the connector; and outputting power of the battery to the speaker through the fifth terminal from the fourth terminal.

14. In paragraph 12, A method further comprising an operation of switching to the second mode based on the power of an audio signal output from the audio amplification circuit being less than a specified threshold power value while the first mode is being performed.

15. In paragraph 12, A method further comprising an operation of switching to the second mode based on the state of charge of the battery or the internal temperature of the electronic device while the first mode is being performed.

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