Wireless charging circuit, chip, method and device, electronic equipment and medium

Abstract

The invention relates to a wireless charging circuit, a chip, a method, a device, electronic equipment and a medium. The wireless charging circuit comprises a power supply input end; the detection circuit is connected with the power supply input end and is used for carrying out in-situ detection on the wireless charging receiving end; the first power supply unit is connected with the power supply input end; the power supply circuit is connected with the first power supply unit, under the condition that the detection circuit detects that the wireless charging receiving end is in place, the detection circuit drives the power supply circuit to be switched from a first state to a second state, the first state is different from the second state, the second state is the working state of the power supply circuit, and the wireless charging receiving end is connected with the first power supply unit. The first state is that the power supply circuit is in a working stop state or the power consumption is lower than a threshold value. According to the invention, the detection circuit is separated from the power supply circuit of the wireless charging transmitting end, so that the power consumption of wireless charging receiving end detection can be reduced, and the charging efficiency of wireless charging is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless charging, and in particular to wireless charging circuits, chips, methods, devices, electronic devices, and media. Background Art

[0002] In related technologies, wireless charging transmitters need to periodically send signals to detect the receiver. Prolonged periods of standby detection by the transmitter result in significant power loss. Therefore, the power consumption of wireless charging receiver detection methods in these scenarios is also highly demanding. Summary of the Invention

[0003] To overcome the problems existing in the related art, the present disclosure provides a wireless charging circuit, chip, method, device, electronic device and medium.

[0004] According to a first aspect of an embodiment of the present disclosure, a wireless charging circuit is provided, comprising: a power input terminal; a detection circuit connected to the power input terminal, for detecting the presence of a wireless charging receiving terminal; a first power supply unit connected to the power input terminal; and a power supply circuit connected to the first power supply unit, wherein when the detection circuit detects that the wireless charging receiving terminal is in place, the detection circuit drives the power supply circuit to switch from a first state to a second state, wherein the first state is different from the second state, the second state is a state in which the power supply circuit is working, and the first state is a state in which the power supply circuit is in a stopped working state or a state in which power consumption is lower than a threshold.

[0005] In one embodiment, the detection circuit is used to perform presence detection on the wireless charging receiving end in the case of wireless reverse charging.

[0006] In one embodiment, the detection circuit sends a wake-up signal to the first power supply unit when it detects that the wireless charging receiving end is in place. The first power supply unit receives the wake-up signal sent by the detection circuit, supplies power to the power supply circuit, and triggers the power supply circuit to switch from the first state to the second state.

[0007] In one embodiment, the detection circuit includes: a second power supply unit, connected to the power input end, the second power supply unit is used to generate a power supply voltage; a first circuit, connected to the second power supply unit, is used to perform in-place detection on the wireless charging receiving end.

[0008] In one embodiment, the detection circuit further includes: a second circuit connected to the first power supply unit and the first circuit, and configured to provide a reference voltage.

[0009] In one embodiment, the first circuit includes: a quality factor Q value detection circuit, connected to the second power supply unit, the Q value detection circuit is used to periodically detect a first parameter, and the first parameter is used to determine the quality factor Q value; a Q value control circuit, connected to the second power supply unit, is used to calculate the Q value based on the first parameter detected by the Q value detection circuit, and perform in-place detection of the wireless charging receiving end based on the Q value.

[0010] In one embodiment, the power supply circuit includes: a control module, connected to the first power supply unit, for controlling and managing the wireless charging transmitter; and a transmission module, connected to the first power supply unit, for transmitting energy to the wireless charging receiver.

[0011] According to a second aspect of the embodiments of the present disclosure, a wireless charging chip is provided, comprising the wireless charging circuit described in the first aspect or any one of the implementations of the first aspect.

[0012] According to a third aspect of the embodiments of the present disclosure, there is provided an electronic device, comprising: a wireless charging chip, comprising the wireless charging circuit described in the first aspect or any one of the embodiments of the first aspect;

[0013] a resonant circuit, wherein a phase midpoint of the resonant circuit is connected to a detection circuit of the wireless charging circuit and is configured to output a resonant point voltage to the detection circuit;

[0014] The detection circuit detects the voltage at the resonance point and performs a presence detection on the wireless charging receiving end according to the voltage at the resonance point.

[0015] According to a fourth aspect of an embodiment of the present disclosure, a wireless charging method is provided, including: controlling a detection circuit connected to a power input terminal to perform a presence detection on a wireless charging receiving terminal; when the detection circuit detects that the wireless charging receiving terminal is in place, controlling the detection circuit to drive a power supply circuit to switch from a first state to a second state, wherein the first state is different from the second state, the second state is a state in which the power supply circuit is working, and the first state is a state in which the power supply circuit is in a stopped working state or a state in which power consumption is lower than a threshold.

[0016] In one embodiment, when the detection circuit detects that the wireless charging receiving end is in place, controlling the detection circuit to drive the power supply circuit to switch from the first state to the second state includes: in response to the detection circuit detecting that the wireless charging receiving end is in place, controlling the detection circuit to send a wake-up signal to the first power supply unit; in response to detecting that the first power supply unit receives the wake-up signal, controlling the first power supply unit to supply power to the power supply circuit, triggering the power supply circuit to switch from the first state to the second state.

[0017] In one embodiment, the control circuit connected to the power input terminal performs on-site detection on the wireless charging receiving terminal, including: in response to the detection circuit detecting the resonance point voltage output by the resonant circuit, controlling the detection circuit to perform on-site detection based on the resonance point voltage.

[0018] In one embodiment, in response to the detection circuit detecting the resonant point voltage output by the resonant circuit, the detection circuit is controlled to perform on-site detection based on the resonant point voltage, including: periodically detecting the resonant point voltage, and calculating a first parameter based on the resonant point voltage, the first parameter including the time width and resonant frequency of a pulse signal generated based on the resonant point voltage; calculating a Q value based on the first parameter, and performing on-site detection on the wireless charging receiving end based on the Q value detection.

[0019] In one embodiment, the performing presence detection on the wireless charging receiving end according to the Q value detection includes: if at least one of the Q value, the time width and the resonant frequency is greater than a set threshold, determining that the wireless charging receiving end is in place.

[0020] According to a fifth aspect of an embodiment of the present disclosure, a wireless charging device is provided, including: a detection unit, configured to control a detection circuit connected to a power input terminal to perform in-place detection on a wireless charging receiving terminal; a switching unit, configured to control the detection circuit to drive a power supply circuit to switch from a first state to a second state when the detection circuit detects that the wireless charging receiving terminal is in place, wherein the first state is different from the second state, the second state is a state in which the power supply circuit is working, and the first state is a state in which the power supply circuit is in a stopped working state or a state in which power consumption is lower than a threshold.

[0021] In one embodiment, the switching unit controls the detection circuit to drive the power supply circuit to switch from the first state to the second state when the detection circuit detects that the wireless charging receiving end is in place. In response to the detection circuit detecting that the wireless charging receiving end is in place, the detection circuit is controlled to send a wake-up signal to the first power supply unit; in response to detecting that the first power supply unit receives the wake-up signal, the first power supply unit is controlled to supply power to the power supply circuit, triggering the power supply circuit to switch from the first state to the second state.

[0022] In one embodiment, the detection unit controls a detection circuit connected to the power input terminal to perform on-site detection on the wireless charging receiving terminal in the following manner: in response to the detection circuit detecting the resonant point voltage output by the resonant circuit, the detection circuit is controlled to perform on-site detection based on the resonant point voltage.

[0023] In one embodiment, the detection unit controls the detection circuit to perform on-site detection based on the resonance point voltage in response to the detection circuit detecting the resonance point voltage output by the resonance circuit in the following manner: periodically detecting the resonance point voltage, and calculating a first parameter based on the resonance point voltage, the first parameter including the time width and resonant frequency of a pulse signal generated based on the resonance point voltage; calculating a Q value based on the first parameter, and performing on-site detection on the wireless charging receiving end based on the Q value detection.

[0024] In one embodiment, the detection unit performs presence detection on the wireless charging receiving end according to the Q value detection in the following manner: if at least one of the Q value, the time width and the resonant frequency is greater than a set threshold, it is determined that the wireless charging receiving end is in place.

[0025] According to a sixth aspect of an embodiment of the present disclosure, an electronic device is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: execute the method described in the fourth aspect or any one of the implementation methods of the fourth aspect.

[0026] According to the seventh aspect of the embodiments of the present disclosure, a storage medium is provided, in which instructions are stored. When the instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method described in the fourth aspect or any one of the embodiments of the fourth aspect.

[0027] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: separating the detection circuit from the power supply circuit of the wireless charging transmitter, and waking up the power supply circuit to enter the working state only when the wireless charging receiver is detected to be in place, which can reduce the power consumption of the wireless charging receiver detection, thereby extending battery life, saving energy, and improving the charging efficiency of wireless charging.

[0028] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and are also

[0030] Figure 1 is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment.

[0031] Figure 2 is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment.

[0032] Figure 3is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment.

[0033] Figure 4 is a schematic diagram showing a wireless charging circuit structure according to an exemplary embodiment.

[0034] Figure 5 is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment.

[0035] Figure 6 The figure is a schematic diagram of a wireless charging circuit according to an exemplary embodiment.

[0036] Figure 7 The figure is a schematic structural diagram of an electronic device according to an exemplary embodiment.

[0037] Figure 8 The figure is a flow chart showing a wireless charging method according to an exemplary embodiment.

[0038] Figure 9 The figure is a flow chart showing a wireless charging method according to an exemplary embodiment.

[0039] Figure 10 The figure is a flow chart showing a wireless charging method according to an exemplary embodiment.

[0040] Figure 11 The figure is a flow chart showing a method for performing presence detection based on resonance point voltage according to an exemplary embodiment.

[0041] Figure 12 The figure is a flow chart showing a method for performing presence detection based on resonance point voltage according to an exemplary embodiment.

[0042] Figure 13 is a block diagram of a wireless charging device according to an exemplary embodiment.

[0043] Figure 14 The figure is a block diagram of a device for wireless charging according to an exemplary embodiment. DETAILED DESCRIPTION

[0044] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present disclosure.

[0045] The technical solution disclosed herein is applied to wireless charging technology scenarios. The wireless charging system in this scenario includes a wireless charging transmitter and a wireless charging receiver. The wireless charging transmitter is used to charge a wireless charging receiver device with wireless charging capabilities. For example, the wireless charging transmitter device can be a wireless charging power bank, a wireless charging pad, a wireless charger, or a mobile terminal device with a reverse charging function that uses a battery for wireless charging.

[0046] Wireless charging technology refers to contactless power transmission through air, rather than wires, using electromagnetic induction, electromagnetic resonance, radio frequency, microwaves, lasers, and other methods. Compared to traditional wired charging, wireless charging technology is more convenient because it does not require wiring.

[0047] Wireless charging technology provides convenient wireless charging for mobile devices, but in actual applications, especially in small and medium power application scenarios, the power consumption of wireless charging receiver detection still needs to be further reduced.

[0048] In view of this, a wireless charging circuit is proposed in an embodiment of the present disclosure.

[0049] It should be understood that the present disclosure is not limited to the exact structures that have been described in the embodiments and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof.

[0050] Figure 1 FIG is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment. Figure 1 As shown, the wireless charging circuit 100 includes a power input terminal 101 , a detection circuit 102 , a first power supply unit 103 and a power supply circuit 104 .

[0051] In the embodiment of the present disclosure, the power input terminal 101 can be used to supply power to the entire wireless charging circuit.

[0052] In the embodiment of the present disclosure, the detection circuit 102 is connected to the power input terminal 101 and is used to perform in-place detection on the wireless charging receiving terminal.

[0053] In the embodiment of the present disclosure, the first power supply unit 103 is connected to the power input terminal 101. Furthermore, the first power supply unit can stabilize the voltage input from the power input terminal 101, thereby providing a stabilized voltage to the power supply circuit 104. In one example, the first power supply unit can be a voltage regulator, for example, a low dropout linear regulator (LDO).

[0054] In the embodiment of the present disclosure, the power supply circuit 104 is connected to the first power supply unit 103. The power supply circuit 104 can operate based on the stable voltage provided by the first power supply unit.

[0055] In the embodiment of the present disclosure, when the detection circuit 102 detects that the wireless charging receiver is in place, the detection circuit 102 drives the power supply circuit to switch from a first state to a second state. The first state is different from the second state. The second state is a state in which the power supply circuit is operating, and the first state is a state in which the power supply circuit is in a stopped state or the power consumption is below a threshold.

[0056] In the disclosed embodiment, the detection circuit 102 can be used to detect the presence of the wireless charging receiver during wireless reverse charging. In the disclosed embodiment, when detecting the wireless charging receiver in standby mode, the detection circuit 102 and the power supply circuit 104 can be set to be in an active state, thereby reducing the power consumption of the wireless charging receiver detection and improving the applicability of wireless charging scenarios using batteries.

[0057] In the embodiment of the present disclosure, when the detection circuit 102 detects that the wireless charging receiving end is in place, it sends a wake-up signal to the first power supply unit 103. When the first power supply unit 103 receives the wake-up signal sent by the detection circuit 102, it supplies power to the power supply circuit 104, thereby triggering the power supply circuit 104 to switch from the first state to the second state. In the embodiment of the present disclosure, the circuit for detecting the wireless charging receiving end is separated from the power supply circuit for the wireless charging transmitting end. The detection circuit can independently detect the receiving end without starting the entire power supply circuit. The power supply circuit enters the working state only after receiving the wake-up signal sent by the detection circuit, thereby reducing the power consumption of the receiving end detection during wireless charging.

[0058] Figure 2 FIG is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment. Figure 2 As shown, the detection circuit 102 further includes: a second power supply unit 105 and a first circuit 106 .

[0059] In the embodiment of the present disclosure, the second power supply unit 105 is connected to the power input terminal 101. The second power supply unit 105 is connected to the first circuit 106. The second power supply unit is connected to the power input terminal and the first circuit, thereby being able to convert the signal at the power input terminal into a regulated voltage signal and supply power to the first circuit.

[0060] In the disclosed embodiment, the second circuit is configured to detect the presence of the wireless charging receiver. When the second circuit detects the presence of the wireless charging receiver, it sends a wake-up signal to the first power supply unit, waking the first power supply unit so that it can supply power to the power supply circuit. Otherwise, the first power supply unit remains in a non-awakened state and does not supply power to the power supply circuit.

[0061] In the embodiment of the present disclosure, the detection circuit 102 further includes: a second circuit 107 . Figure 3 is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment. Figure 3 As shown, the second circuit 107 is connected to the second power supply unit 105 and the first circuit 106. The second circuit 107 can use two resistors with different temperature coefficients to offset the effect of temperature on voltage, thereby generating a constant voltage that is independent of temperature, thereby providing a constant voltage to the wireless charging transmitter system to ensure normal operation of wireless charging. Figure 4 FIG. 1 is a schematic diagram showing a wireless charging circuit structure according to an exemplary embodiment. Figure 4 As shown, the first circuit 106 includes:

[0062] The quality factor Q value detection circuit 108 is connected to the second power supply unit and is used to periodically detect a first parameter of the resonant circuit, wherein the first parameter is used to determine the quality factor Q value.

[0063] The Q value control circuit 109 is connected to the second power supply unit, and is used to calculate the Q value according to the first parameter detected by the Q value detection circuit, and perform in-place detection on the wireless charging receiving end according to the Q value and send a wake-up signal to the power supply circuit.

[0064] The quality factor Q value detection circuit calculates a first parameter and sends the first parameter to the Q value control circuit.

[0065] The Q value control circuit calculates the Q value according to the first parameter and determines whether there is a wireless charging receiving end according to the size of the quality factor Q value and sends a wake-up signal to the power supply circuit.

[0066] In the disclosed embodiment, the quality factor (Q) detection circuit is responsible for acquiring information related to the Q value, while the Q value control circuit determines whether to wake up the main chip circuit and enter the power transmission state based on the Q value. This detection and control process can achieve lower receiving-end detection power consumption and higher system efficiency, improving the performance and user experience of the wireless charging system.

[0067] In one embodiment, a Q value is calculated based on a first parameter, where the Q value parameters include the time width and resonant frequency of a pulse signal T_measure generated based on the resonant point voltage. If at least one of the Q value, the time width, and the resonant frequency is greater than a set threshold, the presence of a wireless charging receiver is determined, and a wake-up signal is sent to the LDO of the power supply circuit. The power supply circuit enters an operating state and sends a wake-up signal to the power supply circuit.

[0068] The Q-value control circuit calculates the Q-value based on the first parameter input by the quality factor Q-value detection circuit. If at least one of the Q-value, pulse duration, and resonant frequency exceeds a set threshold, a wake-up signal is generated to wake up the LDO, thereby waking up the power supply circuit and entering a power transmission state.

[0069] In order to achieve more accurate judgment, it is also possible to compare the Q value and the first parameter in the initial state. If at least one of the changes in the quality factor Q, pulse time width and resonant frequency compared with the initial state is greater than a set threshold, a wake-up signal is generated to wake up the LDO, thereby waking up the power supply circuit to enter the power transmission state.

[0070] For example, if the Q value changes by more than a preset value, or the length of ΔT changes by more than a preset value, or the frequency changes by more than a preset value, the Q value control circuit will generate a wake-up signal to wake up the LDO, and the power supply circuit will enter the normal working mode.

[0071] In the embodiment of the present disclosure, the power supply circuit 104 further includes: a control module 110 and a transmission module 111 . Figure 5 is a schematic diagram showing the structure of a wireless charging circuit according to an exemplary embodiment. Figure 5 As shown, the control module 110 is connected to the first power supply unit 103 for controlling and managing the wireless charging transmitter. The transmission module 111 is connected to the first power supply unit 103 for transmitting energy to the wireless charging receiver.

[0072] In one example, the control module may be a microcontroller unit that manages and controls the wireless charging transmitter, and the transmission module may be a power stage circuit that transmits energy to the wireless charging receiver.

[0073] The embodiments of the present disclosure are described below with reference to examples to illustrate the wireless charging circuit involved above. In the following examples, the wake-up detection module is used as the detection circuit, the power supply unit is used as the first power supply unit, and the combination of the MCU and the power stage is used as the power supply circuit.

[0074] Figure 6 The figure is a schematic diagram of a wireless charging circuit according to an exemplary embodiment.

[0075] like Figure 6As shown, the power supply circuit can include modules such as the MCU and power stage. The power supply unit provides power to the entire wireless transmission system, ensuring that all components operate at normal operating voltages. The MCU microcontroller unit controls and manages the various functions of the wireless charging transmission system. The power stage is responsible for actual energy transmission and can be used to adjust the transmission power.

[0076] The wake-up detection module is used to detect the wireless charging receiving end and is separated from the power supply unit and the power supply circuit.

[0077] In the disclosed embodiment, since the wake-up detection module is separated from the power supply unit and the power supply circuit, the detection module can independently perform receiver detection without activating the entire power supply unit and the power supply circuit. Thus, when the wireless charging transmitter system is performing receiver detection, the power supply unit and the power supply circuit can remain powered off, avoiding unnecessary power consumption and significantly reducing the system's standby power consumption.

[0078] Based on the same concept, an embodiment of the present disclosure further provides an electronic device.

[0079] Figure 7 FIG. 1 is a structural diagram of an electronic device 300 according to an exemplary embodiment. Figure 7 As shown, the electronic device includes a wireless charging chip 200 and a resonant circuit 301 .

[0080] In the embodiment of the present disclosure, the wireless charging chip is connected to the resonant circuit, so that the detection circuit in the wireless charging chip can detect the signal in the resonant circuit, and then perform in-place detection on the wireless charging receiving end.

[0081] In the embodiment of the present disclosure, the detection circuit can be connected to the phase midpoint of the resonant circuit, so that the detection circuit can detect the resonant point voltage of the resonant circuit, and then determine whether the wireless charging receiving end is in place based on the detected voltage signal.

[0082] The resonant circuit 301 may include an inductor Lp and a resonant capacitor Cp, and a phase midpoint of the resonant circuit is connected to the detection circuit for outputting a resonant point voltage VATNK to the detection circuit.

[0083] In the resonant circuit of the electronic device in the embodiment of the present disclosure, the inductor and capacitor are key components for forming a resonant oscillation. The resonant circuit is one of the core parts for achieving efficient wireless energy transmission.

[0084] Inductors, typically consisting of coils of wire, store energy by creating a magnetic field within the conductor. In a resonant circuit at the transmitter end, the inductor is often referred to as a resonant coil or transmitting coil. The resonant coil's primary function is to convert the DC power supply voltage from the transmitter into an AC current. When DC power is applied to the resonant coil, it generates a varying magnetic field, causing a resonant current to flow within the coil.

[0085] A capacitor is typically composed of two electrodes separated by a dielectric between two conductors. In a resonant circuit on the transmitter side, this capacitor is often referred to as a resonant capacitor. The resonant capacitor's main function is to form a resonant circuit with the resonant coil. When current flows through the resonant coil, the resonant capacitor stores electrical energy. This energy is then repeatedly converted to and from the magnetic field of the resonant coil, generating resonant oscillations.

[0086] In the disclosed embodiments, the resonant point voltage VTANK generally refers to the midpoint voltage in the resonant circuit. When the resonant circuit is in a resonant state, energy is exchanged between the inductor Lp and the capacitor Cp at the resonant frequency, forming a resonant oscillation. In this state, the voltage in the resonant circuit exhibits phase shifts and reaches a maximum near the resonant frequency.

[0087] The voltage at the resonant point is a key indicator of energy transfer and exchange in a resonant circuit. Detecting changes in the voltage at the resonant point provides information about the resonant circuit's characteristics, which can be used to determine the presence of a receiving end.

[0088] In the embodiment of the present disclosure, the detection circuit in the wireless charging chip 200 may include a driving circuit and a detection pin.

[0089] The driving circuit may be connected to a switch control circuit connected to both ends of the resonant circuit, and the switch control circuit may be used to control the resonant circuit to charge and generate LC resonance.

[0090] In the embodiments of the present disclosure, the electronic device may be a terminal, such as a mobile phone, or a wireless charger.

[0091] Based on the same concept, the present disclosure also provides a wireless charging method, which can be applied to the wireless charging circuit involved in the above embodiments.

[0092] Figure 8 FIG. 1 is a flow chart showing a wireless charging method according to an exemplary embodiment. Figure 8 As shown, the method includes the following steps.

[0093] In step S11, a detection circuit connected to the power input terminal is controlled to perform a presence detection on the wireless charging receiving terminal.

[0094] In step S12 , when the detection circuit detects that the wireless charging receiving end is in place, the detection circuit is controlled to drive the power supply circuit to switch from the first state to the second state.

[0095] The first state is different from the second state. The second state is a state in which the power supply circuit is working, and the first state is a state in which the power supply circuit is in a stopped state or the power consumption is lower than a threshold.

[0096] In the embodiment of the present disclosure, the circuit for detecting the wireless charging receiving end is separated from the first power supply circuit and the power supply circuit of the wireless charging transmitting end. The detection circuit can independently perform detection of the receiving end without starting the entire circuit. The power supply circuit enters the working state only after receiving the wake-up signal sent by the detection circuit, thereby reducing the power consumption of the receiving end detection in wireless charging.

[0097] Figure 9 FIG. 1 is a flow chart showing a method for wireless charging according to an exemplary embodiment. Figure 9 As shown, the method includes the following steps.

[0098] In step S21 , in response to the detection circuit detecting that the wireless charging receiving terminal is in place, the detection circuit is controlled to send a wake-up signal to the first power supply unit.

[0099] In step S22 , in response to detecting that the first power supply unit receives the wake-up signal, the first power supply unit is controlled to supply power to the power supply circuit, triggering the power supply circuit to switch from the first state to the second state.

[0100] In the disclosed embodiment, when the detection circuit determines that the wireless charging receiver is in place, it sends a wake-up signal to the first power supply unit. Upon receiving the wake-up signal from the detection circuit, the first power supply unit switches from the first state to the second state, i.e., from the inoperative state or the low-power state to the operational state, thereby enabling power to be supplied to the power supply circuit and enabling the power supply circuit to perform its corresponding function.

[0101] In the embodiment of the present disclosure, power is supplied to the wireless charging receiving terminal only when it is determined that the wireless charging receiving terminal is in place, thereby avoiding power consumption of the receiving terminal detection during wireless charging.

[0102] Figure 10 FIG. 1 is a flow chart showing a method for wireless charging according to an exemplary embodiment. Figure 10 As shown, the method includes the following steps.

[0103] In step S31 , in response to the detection circuit detecting the resonance point voltage output by the resonance circuit, the detection circuit is controlled to perform presence detection based on the resonance point voltage.

[0104] In the embodiment of the present disclosure, the resonant circuit can output the resonant point voltage to the detection circuit. The resonant circuit is one of the core parts for achieving efficient wireless energy transmission, and can generally include an inductor Lp and a resonant capacitor Cp. The resonant point voltage generally refers to the midpoint voltage in the resonant circuit. When the resonant circuit is in a resonant state, at the resonant frequency, energy is exchanged back and forth between the inductor Lp and the capacitor Cp to form a resonant oscillation. In this state, the voltage of the resonant circuit will change in phase, and near the resonant frequency, the voltage will present a maximum value.

[0105] In step S32 , when the detection circuit detects that the wireless charging receiving end is in place, the detection circuit is controlled to drive the power supply circuit to switch from the first state to the second state.

[0106] In the disclosed embodiment, when the receiving end is close to the transmitting end, the characteristics of the resonant circuit may be affected, thereby affecting the change in the resonant point voltage VTANK. By detecting the resonant point voltage VTANK and obtaining information related to the resonant circuit characteristics based on the change in the resonant point voltage VTANK, the presence of a wireless charging receiving end is detected. If the presence of a wireless charging receiving end is detected, a wake-up signal is sent to the first power supply unit.

[0107] In the disclosed embodiment, when the detection circuit detects the resonant point voltage output by the resonant circuit, it can calculate corresponding parameters based on the resonant point voltage to determine whether the wireless charging receiver is in place. If the wireless charging receiver is in place, a wake-up signal is sent to the first power supply unit.

[0108] Figure 11 FIG. 1 is a flow chart showing a method for performing on-site detection based on the voltage at the resonance point according to an exemplary embodiment. Figure 11 As shown, the method includes the following steps.

[0109] In step S41 , the resonance point voltage is periodically detected, and a first parameter is calculated according to the resonance point voltage.

[0110] The first parameter includes the time width and the resonance frequency of the pulse signal generated according to the resonance point voltage.

[0111] In step S42, a Q value is calculated according to the first parameter, and a presence detection is performed on the wireless charging receiving end according to the Q value detection.

[0112] In the embodiment of the present disclosure, the resonant capacitor Cp can be charged by controlling the on and off of the switch in the switch control circuit. For example, the Q value detection circuit initiates a detection every 500ms.

[0113] In the disclosed embodiments, a switch control circuit charges the resonant capacitor in the resonant circuit. When the voltage on the resonant capacitor reaches a preset voltage, the charging circuit is closed, generating LC resonance and outputting the resonant voltage to the detection circuit. This strategy of charging the resonant capacitor only when needed and immediately closing the charging circuit once it reaches the preset voltage allows for detection at the receiving end using the resonant circuit and reduces energy waste.

[0114] In the disclosed embodiment, the resonant point voltage is periodically detected, and the Q value parameters are calculated based on the resonant point voltage. The Q value parameters include the time width and resonant frequency of the pulse signal generated based on the resonant point voltage. For example, by detecting the oscillation attenuation amplitude of the resonant point voltage VTANK, based on the comparison with the two set voltage thresholds, if the voltage is less than VHIGH in a single cycle, a T_measure rising edge is generated, and if the voltage is less than VLOW in a single cycle, a T_measure falling edge is generated. At the same time, a square wave signal of the same frequency is generated according to the zero crossing point of the resonant waveform. The Q value is calculated based on these Q value parameters.

[0115] In the disclosed embodiments, by periodically detecting the Q parameter of the resonant circuit, it is possible to quickly and accurately determine whether a wireless charging receiver is present. Based on the calculation and determination of the Q value, the presence of the receiver can be identified in a very short time, thereby reducing unnecessary energy transfer attempts and effectively activating the charging process.

[0116] Figure 12 FIG. 1 is a flow chart showing a method for performing on-site detection based on the voltage at the resonance point according to an exemplary embodiment. Figure 12 As shown, the method includes the following steps.

[0117] In step S51 , the resonance point voltage is periodically detected, and a first parameter is calculated according to the resonance point voltage.

[0118] In step S52 , if at least one of the Q value, the time width, and the resonant frequency is greater than a set threshold, it is determined that a wireless charging receiving end exists.

[0119] In order to achieve more accurate judgment, the Q value and Q value parameters in the initial state can also be compared. If at least one of the changes in the quality factor Q, pulse time width and resonant frequency compared with the initial state is greater than the set threshold, a wake-up signal is generated to wake up the LDO, thereby waking up the main power supply circuit to enter the power transmission state.

[0120] In the disclosed embodiment, if at least one of the Q value, time width, and resonant frequency is greater than a set threshold, the presence of a wireless charging receiver is determined, and a wake-up signal is sent to the LDO power supply unit of the main power supply circuit, waking the main power supply circuit to an operational state. By comprehensively considering the Q value, time width, and resonant frequency, the presence of a receiver can be more comprehensively determined, reducing the potential for false or missed detections caused by the single Q value determination method, which may be insensitive to changes and thus improve detection reliability.

[0121] Based on the same concept, an embodiment of the present disclosure also provides a wireless charging device.

[0122] It is understandable that the wireless charging device provided by the embodiment of the present disclosure includes hardware structures and / or software modules corresponding to the execution of each function in order to realize the above functions. In combination with the units and algorithm steps of the various examples disclosed in the embodiments of the present disclosure, the embodiments of the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the technical solution of the embodiment of the present disclosure.

[0123] Figure 13 FIG. 4 is a block diagram of a wireless charging device 400 according to an exemplary embodiment. Figure 13 The device 400 includes a detection unit 401 and a switching unit 402.

[0124] The detection unit 401 is used to control the detection circuit connected to the power input terminal to perform in-place detection on the wireless charging receiving terminal.

[0125] The switching unit 402 is used to control the detection circuit to drive the power supply circuit to switch from a first state to a second state when the detection circuit detects that the wireless charging receiving end is in place, wherein the first state is different from the second state, the second state is the state in which the power supply circuit is working, and the first state is the state in which the power supply circuit is in a stopped working state or the power consumption is lower than the threshold.

[0126] In one embodiment, the switching unit 402 controls the detection circuit to drive the power supply circuit to switch from the first state to the second state when the detection circuit detects that the wireless charging receiver is in place. In response to the detection circuit detecting that the wireless charging receiver is in place, the switching unit 402 controls the detection circuit to send a wake-up signal to the first power supply unit. In response to detecting that the first power supply unit receives the wake-up signal, the switching unit controls the first power supply unit to supply power to the power supply circuit, triggering the power supply circuit to switch from the first state to the second state.

[0127] In one embodiment, the detection unit 401 controls the detection circuit connected to the power input terminal in the following manner to perform on-site detection on the wireless charging receiving terminal: in response to the detection circuit detecting the resonant point voltage output by the resonant circuit, the detection circuit is controlled to perform on-site detection based on the resonant point voltage.

[0128] In one embodiment, the detection unit 401 controls the detection circuit to perform presence detection based on the resonance point voltage in response to the detection circuit detecting the resonance point voltage output by the resonant circuit in the following manner: periodically detecting the resonance point voltage and calculating a first parameter based on the resonance point voltage, the first parameter including the time width and resonant frequency of a pulse signal generated based on the resonance point voltage. A Q value is calculated based on the first parameter, and presence detection of the wireless charging receiver is performed based on the Q value detection.

[0129] In one embodiment, the detection unit 401 detects the presence of the wireless charging receiver based on Q-value detection in the following manner: if at least one of the Q-value, time width, and resonant frequency is greater than a set threshold, the wireless charging receiver is determined to be present. Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method and will not be elaborated on here.

[0130] Figure 14 FIG2 is a block diagram of an apparatus 500 for a wireless charging method according to an exemplary embodiment. For example, the apparatus 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0131] Reference Figure 14 , apparatus 500 may include one or more of the following components: a processing component 502 , a memory 504 , a power component 506 , a multimedia component 508 , an audio component 510 , an input / output (I / O) interface 512 , a sensor component 514 , and a communication component 516 .

[0132] The processing component 502 generally controls the overall operation of the device 500, such as operations associated with display, phone calls, data communications, camera operation, and recording operations. The processing component 502 may include one or more processors 520 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 502 may include one or more modules to facilitate interaction between the processing component 502 and other components. For example, the processing component 502 may include a multimedia module to facilitate interaction between the multimedia component 508 and the processing component 502.

[0133] The memory 504 is configured to store various types of data to support operations on the device 500. Examples of such data include instructions for any application or method operating on the device 500, contact data, phone book data, messages, pictures, videos, etc. The memory 504 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0134] Power component 506 provides power to the various components of device 500. Power component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 500.

[0135] The multimedia component 508 includes a screen that provides an output interface between the device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor can not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 508 includes a front camera and / or a rear camera. When the device 500 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

[0136] The audio component 510 is configured to output and / or input audio signals. For example, the audio component 510 includes a microphone (MIC), which is configured to receive external audio signals when the device 500 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 504 or transmitted via the communication component 516. In some embodiments, the audio component 510 also includes a speaker for outputting audio signals.

[0137] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as a keyboard, click wheel, buttons, etc. These buttons may include but are not limited to: a home button, volume buttons, a start button, and a lock button.

[0138] The sensor assembly 514 includes one or more sensors for providing various aspects of the status assessment of the device 500. For example, the sensor assembly 514 can detect the open / closed state of the device 500, the relative positioning of components, such as the display and keypad of the device 500. The sensor assembly 514 can also detect changes in the position of the device 500 or a component of the device 500, the presence or absence of user contact with the device 500, the orientation or acceleration / deceleration of the device 500, and temperature changes of the device 500. The sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 514 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 514 may also include an accelerometer, a gyroscope, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0139] The communication component 516 is configured to facilitate wired or wireless communication between the device 500 and other devices. The device 500 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 516 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 516 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0140] In an exemplary embodiment, the apparatus 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the above-described method.

[0141] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 504 including instructions, which can be executed by the processor 520 of the apparatus 500 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0142] It is understood that in this disclosure, "plurality" refers to two or more than two, and other quantifiers are similar. "And / or" describes the association relationship of related objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0143] It will be further understood that the terms "first," "second," and the like are used to describe various types of information, but such information should not be limited to these terms. These terms are used solely to distinguish information of the same type from one another and do not indicate a particular order or level of importance. In fact, the terms "first," "second," and the like are fully interchangeable. For example, first information could be referred to as second information, and similarly, second information could be referred to as first information without departing from the scope of this disclosure.

[0144] It is further understood that, unless otherwise specified, “connection” includes a direct connection where there are no other components between the two elements, and also includes an indirect connection where there are other elements between the two elements.

[0145] It is further understood that although operations are described in a particular order in the drawings in the embodiments of the present disclosure, this should not be construed as requiring that the operations be performed in the particular order shown or in a serial order, or that all of the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous.

[0146] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein.

[0147] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the scope of the appended claims.

Claims

1. A wireless charging circuit, characterized in that: include: Power input terminal; A detection circuit connected to the power input terminal is used to detect the presence of the wireless charging receiving terminal; a first power supply unit connected to the power input terminal; A power supply circuit connected to a first power supply unit, wherein when the detection circuit detects that a wireless charging receiving terminal is in place, the detection circuit drives the power supply circuit to switch from a first state to a second state, wherein the first state is different from the second state, the second state is a state in which the power supply circuit is working, and the first state is a state in which the power supply circuit is in a stopped working state or a state in which power consumption is lower than a threshold.

2. The wireless charging circuit according to claim 1, wherein: The detection circuit is used to perform on-site detection of the wireless charging receiving end in the case of wireless reverse charging.

3. The wireless charging circuit according to claim 1 or 2, characterized in that: When the detection circuit detects that the wireless charging receiving end is in place, it sends a wake-up signal to the first power supply unit. The first power supply unit receives the wake-up signal sent by the detection circuit, supplies power to the power supply circuit, and triggers the power supply circuit to switch from the first state to the second state.

4. The wireless charging circuit according to claim 1, wherein: The detection circuit comprises: a second power supply unit connected to the power input terminal, and configured to generate a power supply voltage; The first circuit is connected to the second power supply unit and is used to perform on-site detection on the wireless charging receiving end.

5. The wireless charging circuit according to claim 4, characterized in that: The detection circuit further includes: The second circuit is connected to the second power supply unit and the first circuit, and is used to provide a reference voltage.

6. The wireless charging circuit according to claim 4, wherein: The first circuit includes: a quality factor Q value detection circuit, connected to the second power supply unit, the Q value detection circuit being used to periodically detect a first parameter, the first parameter being used to determine the quality factor Q value; The Q value control circuit is connected to the second power supply unit and is used to calculate the Q value according to the first parameter detected by the Q value detection circuit, and perform in-place detection on the wireless charging receiving end according to the Q value.

7. The wireless charging circuit according to claim 1, wherein: The power supply circuit includes: a control module, connected to the first power supply unit, and configured to control and manage the wireless charging transmitter; A transmission module is connected to the first power supply unit and is used to transmit energy to the wireless charging receiving end.

8. A wireless charging chip, characterized in that: The wireless charging circuit comprises the wireless charging circuit according to any one of claims 1 to 7.

9. An electronic device, characterized in that: include: A wireless charging chip, comprising the wireless charging circuit according to any one of claims 1 to 7 or the wireless charging chip according to claim 8; a resonant circuit, wherein a phase midpoint of the resonant circuit is connected to a detection circuit of the wireless charging circuit and is configured to output a resonant point voltage to the detection circuit; The detection circuit detects the voltage at the resonance point and performs a presence detection on the wireless charging receiving end according to the voltage at the resonance point.

10. A wireless charging method, characterized in that: include: Control the detection circuit connected to the power input terminal to perform in-place detection on the wireless charging receiving terminal; When the detection circuit detects that the wireless charging receiving end is in place, the detection circuit is controlled to drive the power supply circuit to switch from a first state to a second state, wherein the first state is different from the second state, the second state is the state in which the power supply circuit is working, and the first state is the state in which the power supply circuit is in a stopped working state or the power consumption is lower than a threshold.

11. The wireless charging method according to claim 10, wherein: When the detection circuit detects that the wireless charging receiving end is in place, controlling the detection circuit to drive the power supply circuit to switch from the first state to the second state includes: In response to the detection circuit detecting that the wireless charging receiving end is in position, controlling the detection circuit to send a wake-up signal to the first power supply unit; In response to detecting that the first power supply unit receives the wake-up signal, the first power supply unit is controlled to supply power to the power supply circuit, triggering the power supply circuit to switch from the first state to the second state.

12. The wireless charging method according to claim 10, wherein: The control circuit connected to the power input terminal performs on-site detection on the wireless charging receiving terminal, including: In response to the detection circuit detecting the resonance point voltage output by the resonance circuit, the detection circuit is controlled to perform presence detection based on the resonance point voltage.

13. The wireless charging method according to claim 12, wherein: In response to the detection circuit detecting the resonance point voltage output by the resonance circuit, controlling the detection circuit to perform presence detection based on the resonance point voltage includes: Periodically detecting the resonance point voltage, and calculating a first parameter based on the resonance point voltage, wherein the first parameter includes a time width and a resonance frequency of a pulse signal generated based on the resonance point voltage; A Q value is calculated according to the first parameter, and an on-site detection is performed on the wireless charging receiving end according to the Q value detection.

14. The wireless charging method according to claim 13, wherein: The performing on-site detection on the wireless charging receiving end according to the Q value detection includes: If at least one of the Q value, the time width, and the resonant frequency is greater than a set threshold, it is determined that the wireless charging receiving end is in place.

15. A wireless charging device, characterized in that: include: A detection unit, configured to control a detection circuit connected to the power input terminal to perform in-place detection on the wireless charging receiving terminal; A switching unit is used to control the detection circuit to drive the power supply circuit to switch from a first state to a second state when the detection circuit detects that the wireless charging receiving end is in place, wherein the first state is different from the second state, the second state is the state in which the power supply circuit is working, and the first state is the state in which the power supply circuit is in a stopped working state or the power consumption is lower than a threshold.

16. The wireless charging device according to claim 15, wherein: The switching unit controls the detection circuit to drive the power supply circuit to switch from the first state to the second state when the detection circuit detects that the wireless charging receiving end is in place in the following manner: In response to the detection circuit detecting that the wireless charging receiving end is in position, controlling the detection circuit to send a wake-up signal to the first power supply unit; In response to detecting that the first power supply unit receives the wake-up signal, the first power supply unit is controlled to supply power to the power supply circuit, triggering the power supply circuit to switch from the first state to the second state.

17. The wireless charging device according to claim 15, wherein: The detection unit controls the detection circuit connected to the power input terminal to perform in-place detection on the wireless charging receiving terminal in the following manner: In response to the detection circuit detecting the resonance point voltage output by the resonance circuit, the detection circuit is controlled to perform presence detection based on the resonance point voltage.

18. The wireless charging device according to claim 17, wherein: The detection unit controls the detection circuit to perform presence detection based on the resonance point voltage output by the resonance circuit in response to the detection circuit detecting the resonance point voltage output by the resonance circuit in the following manner: Periodically detecting the resonance point voltage, and calculating a first parameter based on the resonance point voltage, wherein the first parameter includes a time width and a resonance frequency of a pulse signal generated based on the resonance point voltage; A Q value is calculated according to the first parameter, and an on-site detection is performed on the wireless charging receiving end according to the Q value detection.

19. An electronic device, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor is configured to execute the method according to any one of claims 10 to 14.

20. A storage medium, characterized in that The storage medium stores instructions, and when the instructions in the storage medium are executed by a processor of the terminal, the terminal is enabled to execute the method according to any one of claims 10 to 14.

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