Wireless charging control circuit, electronic equipment and wireless charging control method

Abstract

The invention discloses a wireless charging control circuit, electronic equipment and a wireless charging control method, and belongs to the technical field of electronics. The wireless charging control circuit is applied to the electronic equipment, and comprises a wireless charging coil; the wireless charging circuit is connected with the wireless charging coil; the bleeder circuit is connected with the wireless charging circuit; the sensor module is used for detecting the position relation between the electronic equipment and the wireless charging device and the motion acceleration of the electronic equipment; the power supply control circuit is respectively connected with the wireless charging circuit, the bleeder circuit and the sensor module, and the power supply control circuit is used for controlling the bleeder circuit to enable part of the wireless charging circuit to be grounded under the condition that the position relationship meets a first preset condition or the position relationship and the motion acceleration meet a second preset condition; wherein the first preset condition and the second preset condition are both used for indicating that the electronic equipment is in contact with the wireless charging device again within a preset duration after the electronic equipment is disconnected from the wireless charging device.

Description

Technical Field

[0001] This application belongs to the field of electronic technology, specifically relating to a wireless charging control circuit, electronic device, and wireless charging control method. Background Technology

[0002] The convenience of wireless charging technology has enhanced the user experience. To further improve the user experience, the power of wireless charging is getting higher and higher, which also brings higher reliability risks.

[0003] When an electronic device is placed on a wireless charging pad and is in a high-voltage fast charging state, if the electronic device is removed from the wireless charging pad, the electronic device will quickly exit the high-voltage fast charging state because the energy received by the electronic device weakens, while the wireless charging pad will need to wait for a certain delay before exiting the high-voltage output state.

[0004] Therefore, if the electronic device exits the high-voltage fast charging state but the wireless charging dock has not yet exited the high-voltage output state, and the electronic device is quickly placed back into the wireless charging dock, the output power of the wireless charging dock and the power of the electronic device will not match. This will cause the LDO (Low Dropout Regulator) inside the wireless charging IC (Integrated Circuit) of the electronic device to overheat due to the large voltage difference, which may easily lead to the wireless charging IC being burned out. Summary of the Invention

[0005] The purpose of this application is to provide a wireless charging control circuit, electronic device, and wireless charging control method, which can reduce the risk of the wireless charging circuit being burned out when the electronic device is quickly picked up and put down during the wireless charging process.

[0006] In a first aspect, embodiments of this application provide a wireless charging control circuit applied to an electronic device. The wireless charging control circuit includes: a wireless charging coil; a wireless charging circuit connected to the wireless charging coil; a discharge circuit connected to the wireless charging circuit; a sensor module for detecting the positional relationship between the electronic device and the wireless charging device, as well as the motion acceleration of the electronic device; and a power control circuit connected to the wireless charging circuit, the discharge circuit, and the sensor module. The power control circuit controls the discharge circuit to ground a portion of the wireless charging circuit when the positional relationship meets a first preset condition, or when the positional relationship and motion acceleration meet a second preset condition. Both the first and second preset conditions are used to indicate that after the electronic device disconnects from the wireless charging device, it will re-establish contact with the wireless charging device within a preset time period.

[0007] Secondly, embodiments of this application provide an electronic device, including: a wireless charging control circuit as described in the first aspect.

[0008] Thirdly, embodiments of this application provide a wireless charging control method, applied to the wireless charging control circuit of the first aspect. The wireless charging control method includes: acquiring the positional relationship between an electronic device and a wireless charging device, and the motion acceleration of the electronic device, wherein the positional relationship includes a nearing state and a faring state; when the positional relationship meets a first preset condition, or when the positional relationship and motion acceleration meet a second preset condition, controlling the discharge circuit in the wireless charging control circuit to ground a portion of the wireless charging circuit; wherein the first preset condition and the second preset condition are used to indicate that after the electronic device disconnects from the wireless charging device, the electronic device will reconnect with the wireless charging device within a preset time period.

[0009] Fourthly, embodiments of this application provide a readable storage medium storing a program or instructions that, when executed by a processor, implement the steps of the wireless charging control method as described in the third aspect.

[0010] Fifthly, embodiments of this application provide a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the steps of the wireless charging control method as described in the third aspect.

[0011] In a sixth aspect, embodiments of this application provide a computer program product, which is stored in a storage medium and executed by at least one processor to implement the steps of the wireless charging control method as described in the third aspect.

[0012] The wireless charging control circuit provided in this application embodiment is applied to an electronic device. The wireless charging control circuit includes a wireless charging coil, a wireless charging circuit, a discharge circuit, a sensor module, and a power control circuit. The wireless charging circuit is connected to the wireless charging coil, the discharge circuit is connected to the wireless charging circuit, and the power control circuit is connected to the wireless charging circuit, the discharge circuit, and the sensor module. During wireless charging, the sensor module detects the positional relationship between the electronic device and the wireless charging device, as well as the acceleration of the electronic device. The power control circuit controls the discharge circuit to ground a portion of the wireless charging circuit when the positional relationship meets a first preset condition, or when the positional relationship and acceleration meet a second preset condition. Both the first and second preset conditions indicate that after the electronic device has lost contact with the wireless charging device, it should re-establish contact with the wireless charging device within a preset time period.

[0013] By adding a discharge circuit to the aforementioned wireless charging control circuit, the sensor module detects the positional relationship between the electronic device and the wireless charging device, as well as the acceleration of the electronic device's movement. If, after the positional relationship and acceleration indicate that the electronic device has lost contact with the wireless charging device, it re-establishes contact with the wireless charging device within a preset time period, the discharge circuit controls a portion of the wireless charging circuit to ground. This short-circuits the internal voltage of the wireless charging circuit to ground, thereby dissipating energy and clamping the internal voltage within the wireless charging circuit to a safe range. This allows for energy dissipation when the electronic device is quickly picked up and placed down during wireless charging. This effectively solves the problem of excessive heat generation caused by a large voltage difference within the wireless charging circuit due to a mismatch between the output power of the wireless charging device and the power absorbed by the electronic device during rapid handling, reducing the risk of the wireless charging circuit burning out. Attached Figure Description

[0014] Figure 1 A schematic diagram of the wireless charging control circuit provided in an embodiment of this application;

[0015] Figure 2 A schematic diagram illustrating the positional relationship between the electronic device and the wireless charging device provided in an embodiment of this application;

[0016] Figure 3 A flowchart illustrating the operation of the wireless charging control circuit provided in an embodiment of this application;

[0017] Figure 4 This is one of the structural block diagrams of the electronic device provided in the embodiments of this application;

[0018] Figure 5 A flowchart illustrating the wireless charging control method provided in an embodiment of this application;

[0019] Figure 6 This is a structural block diagram of the wireless charging control device provided in the embodiments of this application;

[0020] Figure 7 This is a second structural block diagram of the electronic device provided in the embodiments of this application;

[0021] Figure 8 This is a schematic diagram of the hardware structure of the electronic device provided in the embodiments of this application.

[0022] Figure label:

[0023] 100 Wireless charging control circuit, 102 Wireless charging coil, 104 Wireless charging circuit, 106 Discharge circuit, 108 Sensor module, 110 Power control circuit, 112 Rectifier circuit, 114 Low dropout linear regulator, 116 Power management chip, 118 Processor, 120 SAR sensor, 122 Motion sensor, 124 Detection antenna, Q switch, R1 first resistor, R2 second resistor, D diode, 200 Electronic device, 202 Mid-frame, 300 Wireless charging device. Detailed Implementation

[0024] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] The following is combined Figures 1-8 The wireless charging control circuit, electronic device, and wireless charging control method according to embodiments of this application will be described in detail.

[0028] like Figure 1 As shown, this application embodiment provides a wireless charging control circuit 100. The wireless charging control circuit 100 is applied to an electronic device 200.

[0029] Optionally, such as Figure 1 As shown, the wireless charging control circuit 100 includes a wireless charging coil 102, a wireless charging circuit 104, a discharge circuit 106, a sensor module 108, and a power control circuit 110.

[0030] The wireless charging coil 102 is used to interact with the wireless charging device 300 to generate an AC voltage.

[0031] Optionally, the wireless charging circuit 104 is connected to the wireless charging coil 102. The wireless charging circuit 104 is used to convert the AC voltage output by the wireless charging coil 102 into a charging voltage and output it to power the various loads in the electronic device 200.

[0032] Optionally, the discharge circuit 106 is connected to the wireless charging circuit 104, and the discharge circuit 106 is also connected to ground. When the discharge circuit 106 is enabled, it discharges energy from the wireless charging circuit 104 to reduce the voltage inside the wireless charging circuit 104, thereby clamping the voltage inside the wireless charging circuit 104 to a safe range.

[0033] Optionally, the sensor module 108 is used to detect the positional relationship between the electronic device 200 and the wireless charging device 300, as well as the motion acceleration of the electronic device 200.

[0034] The positional relationship includes a near state and a far state. The near state indicates that the electronic device 200 and the wireless charging device 300 are in contact with each other, such as when the electronic device 200 is placed on the wireless charging device 300. The far state indicates that the electronic device 200 and the wireless charging device 300 are far apart from each other, such as when the electronic device 200 is removed from the wireless charging device 300.

[0035] Optionally, the power control circuit 110 is connected to the wireless charging circuit 104, the discharge circuit 106, and the sensor module 108, respectively. During the wireless charging process of the electronic device 200, the power control circuit 110 enables the discharge circuit 106 to operate when the position relationship detected by the sensor module 108 meets a first preset condition, or when the position relationship and motion acceleration meet a second preset condition. This controls the discharge circuit 106 to ground a portion of the wireless charging circuit 104, thereby discharging energy from the wireless charging circuit 104.

[0036] The first and second preset conditions are both used to instruct the electronic device 200 to re-engage with the wireless charging device 300 within a preset time period after the electronic device 200 has lost contact with the wireless charging device 300. In other words, the first and second preset conditions are both used to instruct the electronic device 200 to be quickly picked up and placed down during the wireless charging process on the wireless charging device 300.

[0037] During the wireless charging process, the electronic device 200 and the wireless charging device 300 maintain constant communication. The preset duration can be determined based on the communication delay time between the electronic device 200 and the wireless charging device 300.

[0038] In practical applications, those skilled in the art can set the specific duration of the above-mentioned preset duration according to the actual situation, and no specific restrictions are imposed here.

[0039] The wireless charging control circuit 100 according to an embodiment of this application is applied to an electronic device 200. The wireless charging control circuit 100 includes a wireless charging coil 102, a wireless charging circuit 104, a discharge circuit 106, a sensor module 108, and a power control circuit 110. The wireless charging circuit 104 is connected to the wireless charging coil 102, the discharge circuit 106 is connected to the wireless charging circuit 104, and the power control circuit 110 is connected to the wireless charging circuit 104, the discharge circuit 106, and the sensor module 108. During wireless charging, the sensor module 108 is used to detect the positional relationship between the electronic device 200 and the wireless charging device 300, as well as the acceleration of the electronic device 200. The power control circuit 110 is used to control the discharge circuit 106 to ground a portion of the wireless charging circuit 104 when the positional relationship meets a first preset condition, or when the positional relationship and acceleration meet a second preset condition. The first and second preset conditions are both used to indicate that after the electronic device 200 disconnects from the wireless charging device 300, it will reconnect with the wireless charging device 300 within a preset time period. A discharge circuit 106 is added to the aforementioned wireless charging control circuit 100. The sensor module 108 detects the positional relationship between the electronic device 200 and the wireless charging device 300, as well as the acceleration of the electronic device 200. When the positional relationship and acceleration indicate that the electronic device 200 has disconnected from the wireless charging device 300, and the electronic device 200 reconnects with the wireless charging device 300 within a preset time period, the discharge circuit 106 controls a portion of the wireless charging circuit 104 to be grounded. This short-circuits the voltage inside the wireless charging circuit 104 to ground, thereby discharging energy from the wireless charging circuit 104 and clamping the voltage inside the wireless charging circuit 104 to a safe range. In this way, when the electronic device 200 is quickly picked up and placed down during wireless charging, the energy received by the electronic device 200 can be released. This effectively solves the problem of severe overheating caused by a large voltage difference inside the wireless charging circuit 104 when the electronic device 200 is quickly picked up and placed down during wireless charging due to the mismatch between the output power of the wireless charging device 300 and the load power of the electronic device 200. This reduces the risk of the wireless charging circuit 104 being burned out.

[0040] According to some embodiments of this application, optionally, such as Figure 1 As shown, the sensor module 108 includes a SAR sensor 120 and a motion sensor 122.

[0041] Both the SAR sensor 120 and the motion sensor 122 are connected to the power control circuit 110.

[0042] It's understandable that SAR (Specific Absorption Rate) sensors operate on the principle of capacitance detection, also known as the mutual capacitance principle. Similar to the principle of a parallel-plate capacitor, the SAR sensor charges one plate (the detection antenna) of this capacitor. When an object or person with a capacitive medium approaches the SAR sensor, the object or person acts as the other plate. At this point, the detection antenna and the capacitive medium function as a complete capacitor, generating capacitance. The capacitance in the SAR sensor's sensing channel changes, and this change in capacitance is converted into a change in voltage, allowing the detection of the approach or departure of a person or object.

[0043] Furthermore, since SAR sensors essentially detect changes in capacitance and do not distinguish between a human body and an object approaching, the equivalent capacitance generated by the approach of a human body and an object differs. The capacitance change generated by metal approaching a SAR sensor will be significantly greater than that generated by a human body approaching a SAR sensor. Based on this, the magnitude of the capacitance change can help determine whether a human body or metal is approaching.

[0044] In practical applications, such as Figure 2 As shown, the detection antenna 124 of the SAR sensor 120 can reuse the mid-frame 202 of the electronic device 200. When an object approaches the detection antenna 124, the detection antenna 124 will have self-capacitive sensing, generating an equivalent parasitic capacitance, thereby causing a change in capacitance value. Based on this, after internal data conversion by the SAR sensor 120, it is possible to identify whether an object is approaching the detection antenna 124.

[0045] Based on this, in this embodiment of the application, the SAR sensor 120 is specifically used to detect and report the positional relationship between the wireless charging device 300 and the electronic device 200 by detecting the proximity capacitance generated when the wireless charging device 300 approaches the electronic device 200. The positional relationship includes a near-away state and a far-away state.

[0046] Optionally, the motion sensor 122 is used to detect the motion acceleration of the electronic device 200.

[0047] In practical applications, the motion sensor 122 can specifically be an A+G (Accelerometer+Gyroscope) sensor, that is, the motion sensor 122 can specifically include an accelerometer and a gyroscope, without specific limitations.

[0048] According to the wireless charging control circuit 100 of this application embodiment, the sensor module 108 includes a SAR sensor 120 and a motion sensor 122. Both the SAR sensor 120 and the motion sensor 122 are connected to the power control circuit 110. The SAR sensor 120 is used to detect the positional relationship between the wireless charging device 300 and the electronic device 200, including a near-total and a far-total state. The motion sensor 122 is used to detect the acceleration of the electronic device 200. Thus, by combining the positional relationship of the electronic device 200 relative to the wireless charging device 300 and the acceleration of the electronic device 200, the contact status between the electronic device 200 and the wireless charging device 300 is determined, improving the accuracy of the operation control of the discharge circuit 106, thereby improving the accuracy of the energy discharge control of the wireless charging circuit 104.

[0049] According to some embodiments of this application, optionally, the first preset condition includes: after the SAR sensor 120 reports a far-away state, the SAR sensor 120 reports a near-away state within a preset time period.

[0050] For example, such as Figure 2 As shown, during the wireless charging process of the electronic device 200 placed on the wireless charging device 300, after the user removes the electronic device 200 from the wireless charging device 300, the SAR sensor 120 reports a distance status. If the user puts the electronic device 200 back on the wireless charging device 300 within a preset time, the SAR sensor 120 reports a proximity status. At this time, the positional relationship between the electronic device 200 and the wireless charging device 300 meets the first preset condition, and the wireless charging circuit 104 is grounded through the discharge circuit 106.

[0051] It is understandable that when electronic device 200 leaves wireless charging device 300, it exits the high-voltage fast charging state, while wireless charging device 300 remains in high-voltage output state for a preset time period due to communication delay. Therefore, if electronic device 200 is removed from wireless charging device 300 and then placed back on within the preset time period, the output power of wireless charging device 300 and the deload power of electronic device 200 will be mismatched, resulting in a large voltage difference inside wireless charging circuit 104, posing a risk of overheating and burnout. At this time, power control circuit 110 triggers energy discharge process, controlling discharge circuit 106 to ground part of wireless charging circuit 104, thereby short-circuiting the voltage inside wireless charging circuit 104 to ground, thus discharging energy from wireless charging circuit 104, clamping the voltage inside wireless charging circuit 104 to a safe range, reducing the voltage difference inside wireless charging circuit 104, and lowering the risk of overheating and burnout.

[0052] According to the wireless charging control circuit 100 of this application embodiment, the first preset condition includes: after the SAR sensor 120 reports a distance state, the SAR sensor 120 reports a proximity state within a preset time period. In this way, based on the positional relationship between the electronic device 200 and the wireless charging device 300, the contact status between the electronic device 200 and the wireless charging device 300 is determined, ensuring the accuracy of the energy dissipation process triggering.

[0053] According to some embodiments of this application, optionally, the second preset condition includes: within a preset time period after the SAR sensor 120 reports a distance status, the motion acceleration of the electronic device 200 is greater than a preset threshold.

[0054] Understandably, once the electronic device 200 leaves the charging range of the wireless charging device 300, the communication between the electronic device 200 and the wireless charging device 300 will be interrupted, and the wireless charging device 300 will exit the high-voltage output state. At this time, even if the electronic device 200 approaches the wireless charging device 300 again, there will be no power mismatch problem, and there is no need to discharge energy.

[0055] Based on this, the above energy discharge process is applied to scenarios where the electronic device 200 is always within the charging range of the wireless charging device 300.

[0056] Understandably, the SAR sensor 120 reporting a distance status indicates that the electronic device 200 has moved away from the wireless charging device 300, meaning that the electronic device 200 has been removed from the wireless charging device 300. At this point, the electronic device 200 exits the high-voltage fast charging state.

[0057] Based on this, if the acceleration of the electronic device 200 exceeds the preset threshold, it indicates that the electronic device 200 was quickly picked up and placed back on. This means that within the charging range of the wireless charging device 300, the time consumed by removing the electronic device from and placing it back on the wireless charging device 300 may still not exceed the preset time. At this point, after the electronic device is placed back on the wireless charging device 300, the electronic device 200 has exited the high-voltage fast charging state, while the wireless charging device 300 remains in a high-voltage output state due to communication delay. This mismatch between the output power of the wireless charging device 300 and the load power of the electronic device 200 will result in a large voltage difference within the wireless charging circuit 104, posing a risk of overheating and burnout, necessitating energy discharge. At this point, the positional relationship between the electronic device 200 and the wireless charging device 300, as well as the acceleration of the electronic device 200, are determined to meet the aforementioned second preset condition.

[0058] In practical applications, the aforementioned preset threshold can be determined through multiple experiments based on the acceleration of the electronic device 200 during its reciprocating motion within the charging range of the wireless charging device 300, and no specific restrictions are imposed here.

[0059] Understandably, after the SAR sensor 120 reports the distance status for a preset period, due to the communication delay time exceeding the limit, the command from the electronic device 200 can be successfully transmitted to the wireless charging device 300, causing the wireless charging device 300 to exit the high-voltage output state. At this time, even if the electronic device 200 approaches the wireless charging device 300 again, there will be no power mismatch problem, and there is no need to discharge energy.

[0060] According to the wireless charging control circuit 100 of this application embodiment, the second preset condition includes: within a preset time period after the SAR sensor 120 reports a distance status, the motion acceleration of the electronic device 200 is greater than a preset threshold. Thus, based on the duration of time the electronic device 200 is away from the wireless charging device 300 and the magnitude of the motion acceleration of the electronic device 200, the triggering conditions for the energy dissipation process are further restricted, which can further ensure the accuracy of the energy dissipation process triggering.

[0061] According to some embodiments of this application, optionally, such as Figure 1 As shown, the wireless charging circuit 104 includes a rectifier circuit 112 and a low-dropout linear regulator 114.

[0062] The input terminal of the rectifier circuit 112 is connected to the wireless charging coil 102. The rectifier circuit 112 is used to rectify the AC voltage output by the wireless charging coil 102 and output a DC voltage.

[0063] Optionally, the rectifier circuit 112 may specifically be a single-phase bridge full-wave rectifier circuit composed of multiple diodes D.

[0064] In practical applications, those skilled in the art can choose the specific topology of the rectifier circuit 112 according to the actual situation, and no specific restrictions are imposed here.

[0065] Optionally, the low dropout linear regulator 114 is an LDO (Low Dropout Regulator). The input terminal of the low dropout linear regulator 114 is connected to the output terminal of the rectifier circuit 112 and the bleeder circuit 106, respectively, and the output terminal of the low dropout linear regulator 114 is connected to the power control circuit 110.

[0066] Optionally, the low-dropout linear regulator 114 is used to regulate the DC voltage output by the rectifier circuit 112 and output a charging voltage to the power control circuit 110 to power the various loads in the electronic device 200.

[0067] Optionally, during the wireless charging process of the electronic device 200, the discharge circuit 106 is used to connect the output terminal of the rectifier circuit 112 to the ground terminal when the DC voltage output by the rectifier circuit 112 is abnormally high, resulting in a large voltage drop of the low dropout linear regulator 114. This short-circuits the DC voltage output by the rectifier circuit 112 to the ground, thereby dissipating the energy of the DC voltage output by the rectifier circuit 112 and clamping the DC voltage output by the rectifier circuit 112 to a safe range, thereby reducing the voltage drop of the low dropout linear regulator 114 and reducing the risk of it overheating and burning out.

[0068] According to the wireless charging control circuit 100 of this application embodiment, the wireless charging circuit 104 includes a rectifier circuit 112 and a low-dropout linear regulator 114. The input terminal of the rectifier circuit 112 is connected to the wireless charging coil 102, and the input terminal of the low-dropout linear regulator 114 is connected to both the output terminal of the rectifier circuit 112 and the discharge circuit 106. The output terminal of the low-dropout linear regulator 114 is connected to the power control circuit 110. This achieves rectification and regulation of the AC voltage induced by the wireless charging coil 102, realizing the conversion of AC voltage to charging voltage, thereby achieving wireless charging.

[0069] According to some embodiments of this application, optionally, such as Figure 1 As shown, the discharge circuit 106 includes a switching transistor Q.

[0070] The first terminal of the switching transistor Q is connected between the output terminal of the rectifier circuit 112 and the input terminal of the low dropout linear regulator 114. That is, the first terminal of the switching transistor Q is used to receive the DC voltage output by the rectifier circuit 112.

[0071] Optionally, the second terminal of the switching transistor Q is grounded, and the control terminal of the switching transistor Q is connected to the power control circuit 110.

[0072] When the switching transistor Q is turned on, it connects the output terminal of the rectifier circuit 112 to ground, meaning the output terminal of the rectifier circuit 112 is grounded through the switching transistor Q. At this time, the DC voltage output by the rectifier circuit 112 is short-circuited to ground, which reduces the DC voltage output by the rectifier circuit 112 and dissipates the energy of the DC voltage output by the rectifier circuit 112.

[0073] Specifically, during the wireless charging process of the electronic device 200, if the positional relationship detected by the sensor module 108 meets the first preset condition, or if the positional relationship and motion acceleration meet the second preset condition, the DC voltage output by the rectifier circuit 112 will experience an abnormally high voltage, resulting in a large voltage drop across the low-dropout linear regulator 114. At this time, the power control circuit 110 controls the switching transistor Q to turn on, so that the output terminal of the rectifier circuit 112 is grounded through the switching transistor Q, thereby dissipating energy from the DC voltage output by the rectifier circuit 112, reducing the DC voltage output by the rectifier circuit 112, and decreasing the voltage drop across the low-dropout linear regulator 114.

[0074] According to the wireless charging control circuit 100 of this application embodiment, the discharge circuit 106 includes a switching transistor Q. The first terminal of the switching transistor Q is connected between the output terminal of the rectifier circuit 112 and the input terminal of the low-dropout linear regulator 114, and the second terminal of the switching transistor Q is grounded. When the switching transistor Q is turned on, the output terminal of the rectifier circuit 112 is grounded through the switching transistor Q. In this way, when an abnormally high DC voltage appears at the output of the rectifier circuit 112, the output terminal of the rectifier circuit 112 is grounded through the switching transistor Q, thereby dissipating the energy of the DC voltage output by the rectifier circuit 112 and reducing the risk of the low-dropout linear regulator 114 overheating and burning out due to a large voltage drop.

[0075] According to some embodiments of this application, optionally, such as Figure 1 As shown, the power control circuit 110 includes a power management chip 116 and a processor 118.

[0076] Among them, the power management chip 116 is a PMIC (Power Management Integrated Circuit), which is connected to the wireless charging circuit 104 and the discharge circuit 106.

[0077] Optionally, the power management chip 116 is used to control whether the switching transistor Q is turned on.

[0078] Optionally, the processor 118 is a SOC (System on a Chip), and the processor 118 is connected to the sensor module 108 and the power management chip 116 respectively.

[0079] Optionally, the processor 118 can communicate with the sensor module 108 via the IIC (Inter-Integrated Circuit, two-wire serial bus) communication protocol, and the processor 118 can communicate with the power management chip 116 via the SPMI (System Power Management Interface) communication protocol.

[0080] Optionally, the switching transistor Q is an NMOS (N-channel Metal-Oxide-Semiconductor) transistor, which turns on when a high-level signal is received at the control terminal.

[0081] Specifically, the processor 118 can receive the positional relationship between the electronic device 200 and the wireless charging device 300, as well as the motion acceleration of the electronic device 200, reported by the sensor module 108 via the IIC communication protocol. When the positional relationship meets the first preset condition, or when the positional relationship and motion acceleration meet the second preset condition, the processor 118 controls the power management chip 116 to output a control signal to the discharge circuit 106 via the SPMI communication protocol. This controls the switching transistor Q to turn on, grounding the output terminal of the rectifier circuit 112, thereby discharging energy from the DC voltage output by the rectifier circuit 112 and reducing the magnitude of the DC voltage output by the rectifier circuit 112.

[0082] According to the wireless charging control circuit 100 of this application embodiment, the power control circuit 110 includes a power management chip 116 and a processor 118. The power management chip 116 is connected to both the wireless charging circuit 104 and the discharge circuit 106; the processor 118 is connected to both the sensor module 108 and the power management chip 116. During wireless charging, the processor 118 controls the power management chip 116 to output a control signal to the discharge circuit 106 when the positional relationship meets a first preset condition, or when the positional relationship and motion acceleration meet a second preset condition. This controls the switching transistor Q to turn on, grounding the output terminal of the rectifier circuit 112. This facilitates timely reduction of the DC voltage output by the rectifier circuit 112 when an abnormally high DC voltage occurs, reducing the risk of the low-dropout linear regulator 114 overheating and burning out due to a large voltage drop.

[0083] According to some embodiments of this application, optionally, such as Figure 1As shown, the discharge circuit 106 also includes a first resistor R1 and a second resistor R2.

[0084] In this circuit, the first end of the first resistor R1 is connected to the control terminal of the switching transistor Q, and the second end of the first resistor R1 is connected to the power management chip 116. That is, the control terminal of the switching transistor Q is connected to the power management chip 116 in the power control circuit 110 through the first resistor R1.

[0085] Optionally, the first resistor R1 is used to limit the current of the control signal output by the power management chip 116 in order to protect the switching transistor Q.

[0086] Optionally, the first end of the second resistor R2 is connected between the output terminal of the power management chip 116 and the input terminal of the first resistor R1, and the second end of the second resistor R2 is grounded.

[0087] Optionally, the second resistor R2 is used to keep the switching transistor Q in the off state when the power management chip 116 does not output a control signal.

[0088] Specifically, before the discharge circuit 106 is enabled, the second resistor R2 is used to provide a low voltage to the control terminal of the switch Q so that the switch Q remains in the initial off state, thereby ensuring the normal execution of the wireless charging process in the initial stage of charging.

[0089] According to the wireless charging control circuit 100 of this application embodiment, the discharge circuit 106 further includes a first resistor R1 and a second resistor R2. The first resistor R1 is connected to both the control terminal of the switching transistor Q and the power management chip 116. The first terminal of the second resistor R2 is connected between the output terminal of the power management chip 116 and the input terminal of the first resistor R1, and the second terminal of the second resistor R2 is grounded. This achieves current-limiting protection and initial state maintenance for the switching transistor Q, improving the stability and reliability of the switching transistor Q's operation.

[0090] In summary, such as Figure 3 As shown, with the processor 118, i.e., SOC, as the execution entity, the working process of the wireless charging control circuit 100 provided in this application embodiment may specifically include the following S302 to S342:

[0091] S302: Determine if the electronic device is communicating with the wireless charging device. If yes, proceed to S304; otherwise, end the process.

[0092] S304: Determine: If the SAR sensor reports proximity status, execute S302 if yes, otherwise execute S306.

[0093] S306: The SOC internal timer starts counting.

[0094] S308: Judgment: If the A+G sensor detects that the motion acceleration of the electronic device is greater than the preset threshold, if yes, execute S310; otherwise, execute S312.

[0095] S310: Controls the PMIC to output a high-voltage control signal to turn on the switching transistor.

[0096] S312: Determine if the timer's duration exceeds the preset duration. If yes, execute S314; otherwise, execute S316.

[0097] S314: Controls the PMIC to output a low-voltage control signal to turn off the switching transistor.

[0098] S316: The timer continues to increment the countdown.

[0099] After S310 finishes execution, S312 continues execution; after S316 finishes execution, S308 continues execution.

[0100] Specifically, the wireless charging control circuit 100 provided in this application embodiment, based on the existing wireless charging circuit architecture, introduces a rapid pick-up and place detection scheme for the electronic device 200. In a wireless charging scenario, the SAR sensor 120 and the A+G sensor are fused to determine whether the electronic device 200 is in an abnormal situation of rapid pick-up and place within the charging range of the wireless charging device 300 within a preset time period. Based on this, after detecting the above-mentioned abnormal situation, wireless charging protection is implemented. A high-voltage control signal is sent through the PMIC to enable the switch Q, so that the energy of the DC voltage output by the rectifier circuit 112 is discharged to the ground through the switch Q. This avoids the problem of the wireless charging circuit 104 overheating and burning out due to the continuous influx of energy received by the wireless charging coil 102, which would cause a mismatch between the output power of the wireless charging device 300 and the deload power of the electronic device 200. This improves the reliability and safety of wireless charging. Furthermore, since the above-mentioned wireless charging control circuit 100 is applied to the electronic device 200, it can protect the wireless charging circuit 104 in the electronic device 200 for wireless charging devices 300 from different manufacturers and with different delay parameters.

[0101] According to some embodiments of this application, optionally, such as Figure 4 As shown, this application embodiment also provides an electronic device 200. The electronic device 200 includes the wireless charging control circuit 100 from any of the above embodiments. The electronic device 200 provided in this application embodiment includes the wireless charging control circuit 100 from any of the above embodiments and achieves the same technical effect; therefore, to avoid repetition, it will not be described again here.

[0102] It should be noted that the electronic device 200 in the embodiments of this application includes mobile electronic devices and non-mobile electronic devices.

[0103] In practical applications, the electronic device 200 can be a terminal or other devices besides a terminal. For example, the electronic device 200 can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. The embodiments of this application do not specifically limit it.

[0104] According to some embodiments of this application, optionally, such as Figure 5 As shown, this application embodiment also provides a wireless charging control method, applied to the wireless charging control circuit as described in any of the above embodiments. Wherein, as... Figure 5 As shown, the wireless charging control method may specifically include the following S402 and S404:

[0105] S402: Obtain the positional relationship between the electronic device and the wireless charging device, as well as the acceleration of the electronic device.

[0106] The wireless charging control method proposed in this application is applied to the wireless charging control circuit as described in any of the above embodiments.

[0107] The positional relationship between the electronic device and the wireless charging device is detected by the SAR sensor 120 in the wireless charging control circuit, and the motion acceleration is detected by the motion sensor such as the A+G sensor in the wireless charging control circuit.

[0108] Optionally, the positional relationship includes a near state and a far state.

[0109] The proximity state indicates that the electronic device and the wireless charging device are in contact, such as when the electronic device is placed on the wireless charging device; the distance state indicates that the electronic device and the wireless charging device are moving away from each other, such as when the electronic device is removed from the wireless charging device. Specifically, in some embodiments of this application, the SAR sensor is used to determine the positional relationship based on the distance value detected between the electronic device and the wireless charging device. When the distance value is less than a preset distance threshold, it reports a proximity state; when the distance value is greater than or equal to the preset distance threshold, it reports a distance state. It is understood that in the embodiments of this application, when the distance between the electronic device and the wireless charging device is greater than the preset distance threshold, it is considered that the electronic device and the wireless charging device are disconnected; when the distance between the electronic device and the wireless charging device is less than or equal to the preset distance threshold, it is considered that the electronic device and the wireless charging device are in contact.

[0110] S404: When the positional relationship meets the first preset condition, or when the positional relationship and motion acceleration meet the second preset condition, control the discharge circuit in the wireless charging control circuit to ground part of the wireless charging circuit.

[0111] The first preset condition and the second preset condition are both used to indicate that after the electronic device disconnects from the wireless charging device, the electronic device will reconnect with the wireless charging device within a preset time period.

[0112] During the wireless charging process, the electronic device and the wireless charging device maintain constant communication. The preset duration can be determined based on the communication delay time between the electronic device and the wireless charging device.

[0113] In practical applications, the specific duration of the aforementioned preset time can be set by those skilled in the art according to actual conditions, and no specific restrictions are imposed here. In particular, the preset time is determined based on the delay required for the wireless charging device to exit the high-voltage output state.

[0114] Specifically, in the wireless charging control method provided in this application embodiment, during the wireless charging process of the electronic device, the positional relationship between the electronic device and the wireless charging device and the motion acceleration of the electronic device are obtained. When the positional relationship meets the first preset condition, or when the positional relationship and motion acceleration meet the second preset condition, that is, when the electronic device contacts the wireless charging device again within a preset time after the electronic device disconnects from the wireless charging device, the discharge circuit in the wireless charging control circuit is controlled to ground part of the wireless charging circuit, so as to short-circuit the voltage inside the wireless charging circuit to the ground, thereby realizing the energy discharge of the wireless charging circuit and clamping the voltage inside the wireless charging circuit to a safe range.

[0115] The wireless charging control method provided in this application obtains the positional relationship between the electronic device and the wireless charging device, as well as the acceleration of the electronic device's motion. The positional relationship includes a near-to-near state and a far-to-far state. When the positional relationship meets a first preset condition, or when the positional relationship and acceleration meet a second preset condition, the method controls the discharge circuit in the wireless charging control circuit to ground a portion of the wireless charging circuit. Both the first and second preset conditions are used to indicate that after the electronic device disconnects from the wireless charging device, it should re-establish contact with the wireless charging device within a preset time period. This allows for the discharge of energy received by the electronic device when it is quickly picked up and placed down during wireless charging. This effectively solves the problem of severe overheating caused by a large voltage difference within the wireless charging circuit due to a mismatch between the output power of the wireless charging device and the load power of the electronic device when the electronic device is quickly picked up and placed down during wireless charging, thus reducing the risk of the wireless charging circuit burning out.

[0116] Optionally, in this application embodiment, the above-mentioned S404 may specifically include the following S404a:

[0117] S404a: After the SAR sensor in the wireless charging control circuit reports a distance status, within a preset time period, if the SAR sensor reports a proximity status, the discharge circuit in the wireless charging control circuit is controlled to ground part of the wireless charging circuit.

[0118] That is, the first preset condition mentioned above may include: after the SAR sensor reports a distant state, the SAR sensor reports a nearby state within a preset time period.

[0119] Specifically, in the wireless charging control method provided in this application embodiment, during the wireless charging process of the electronic device, after the SAR sensor in the wireless charging control circuit reports a distance state, if the SAR sensor reports a proximity state within a preset time period, it indicates that the positional relationship between the electronic device and the wireless charging device meets the first preset condition. At this time, the discharge circuit in the wireless charging control circuit is controlled to ground part of the wireless charging circuit.

[0120] In the embodiments provided in this application, after the SAR sensor in the wireless charging control circuit reports a distance status, within a preset time period, if the SAR sensor reports a proximity status, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. In this way, based on the positional relationship between the electronic device and the wireless charging device, the contact status between the electronic device and the wireless charging device is determined, ensuring the accuracy of the energy discharge process triggering.

[0121] In this embodiment of the application, S404 may specifically include the following S404b:

[0122] S404b: If, within a preset time period after the SAR sensor in the wireless charging control circuit reports a distance status, the acceleration of the electronic device exceeds a preset threshold, the discharge circuit in the wireless charging control circuit is controlled to ground part of the wireless charging circuit.

[0123] That is, the second preset condition mentioned above may include: within a preset time period after the SAR sensor reports the state of being far away, the motion acceleration of the electronic device is greater than a preset threshold.

[0124] Specifically, in the wireless charging control method provided in this application embodiment, during the wireless charging process of the electronic device, if the motion acceleration of the electronic device is greater than a preset threshold within a preset time after the SAR sensor in the wireless charging control circuit reports the distance state, it indicates that the positional relationship between the electronic device and the wireless charging device and the motion acceleration of the electronic device meet the second preset condition. At this time, the discharge circuit in the wireless charging control circuit is controlled to ground part of the wireless charging circuit.

[0125] In the embodiments provided in this application, if the acceleration of the electronic device exceeds a preset threshold within a preset time period after the SAR sensor in the wireless charging control circuit reports a distance status, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. Thus, based on the duration of time the electronic device has been away from the wireless charging device and the magnitude of its acceleration, the triggering conditions for the energy discharge process are further restricted, thereby further ensuring the accuracy of the energy discharge process triggering.

[0126] In this embodiment of the application, the step of grounding a portion of the wireless charging circuit via the discharge circuit in the wireless charging control circuit can specifically include the following step S406:

[0127] S406: Controls the power management chip in the wireless charging control circuit to output a control signal to the discharge circuit, thereby controlling the switching transistor in the discharge circuit to turn on, so that the output terminal of the rectifier circuit in the wireless charging circuit is grounded.

[0128] Specifically, in the wireless charging control method provided in this application embodiment, when the positional relationship meets the first preset condition, or when the positional relationship and motion acceleration meet the second preset condition, that is, when the electronic device and the wireless charging device are disconnected and the electronic device re-contacts the wireless charging device within a preset time period, the power management chip in the wireless charging control circuit is controlled to output a control signal to the bleeder circuit to control the switching transistor in the bleeder circuit to conduct, so that the output terminal of the rectifier circuit in the wireless charging circuit is grounded, so as to short-circuit the DC voltage output by the rectifier circuit to ground, thereby realizing the energy dissipation of the DC voltage output by the rectifier circuit, clamping the DC voltage output by the rectifier circuit to a safe range, thereby reducing the voltage drop of the low dropout linear regulator in the wireless charging circuit and reducing the risk of its overheating and burning.

[0129] The embodiments provided in this application control the power management chip in the wireless charging control circuit to output a control signal to the bleeder circuit, thereby controlling the switching transistor in the bleeder circuit to conduct, and grounding the output terminal of the rectifier circuit in the wireless charging circuit. This facilitates energy dissipation from the rectifier circuit's output DC voltage when an abnormally high DC voltage occurs, by grounding the rectifier circuit's output terminal through the switching transistor. This reduces the risk of the low-dropout linear regulator overheating and burning out due to a large voltage drop.

[0130] The wireless charging control method provided in this application can be executed by a wireless charging control device. This application uses the execution of the above-mentioned wireless charging control method by a wireless charging control device as an example to illustrate the wireless charging control device provided in this application.

[0131] like Figure 6 As shown, this application provides a wireless charging control device 500, which is applied to the wireless charging control circuit in any of the above embodiments. Specifically, the wireless charging control device 500 may include an acquisition unit 502 and a control unit 504.

[0132] The acquisition unit 502 is used to acquire the positional relationship between the electronic device and the wireless charging device, as well as the motion acceleration of the electronic device. The positional relationship includes a close-to-the-near state and a far-from-the-near state.

[0133] The control unit 504 is used to control the discharge circuit in the wireless charging control circuit to ground part of the wireless charging circuit when the position relationship meets the first preset condition, or when the position relationship and motion acceleration meet the second preset condition.

[0134] The first preset condition and the second preset condition are both used to indicate that after the electronic device disconnects from the wireless charging device, the electronic device will reconnect with the wireless charging device within a preset time period.

[0135] The wireless charging control device 500 provided in this application embodiment acquires the positional relationship between an electronic device and a wireless charging device, as well as the motion acceleration of the electronic device. The positional relationship includes a near-to-near state and a far-to-far state. When the positional relationship meets a first preset condition, or when the positional relationship and motion acceleration meet a second preset condition, the device controls a discharge circuit in the wireless charging control circuit to ground a portion of the wireless charging circuit. Both the first and second preset conditions are used to instruct the electronic device to re-establish contact with the wireless charging device within a preset time period after the contact is broken. This allows for the discharge of energy received by the electronic device when it is quickly picked up and placed down during wireless charging. This effectively solves the problem of excessive heat generation caused by a large voltage difference within the wireless charging circuit due to a mismatch between the output power of the wireless charging device and the load power of the electronic device when the electronic device is quickly picked up and placed down during wireless charging, thus reducing the risk of the wireless charging circuit burning out.

[0136] In this embodiment of the application, the control unit 504 is specifically used to: after the SAR sensor in the wireless charging control circuit reports a distance state, within a preset time period, when the SAR sensor reports a proximity state, control the discharge circuit in the wireless charging control circuit to ground part of the wireless charging circuit.

[0137] In the embodiments provided in this application, after the SAR sensor in the wireless charging control circuit reports a distance status, within a preset time period, if the SAR sensor reports a proximity status, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. In this way, based on the positional relationship between the electronic device and the wireless charging device, the contact status between the electronic device and the wireless charging device is determined, ensuring the accuracy of the energy discharge process triggering.

[0138] In this embodiment, the control unit 504 is specifically used to: within a preset time period after the SAR sensor in the wireless charging control circuit reports a distance status, if the motion acceleration of the electronic device is greater than a preset threshold, control the discharge circuit in the wireless charging control circuit to ground part of the wireless charging circuit.

[0139] In the embodiments provided in this application, if the acceleration of the electronic device exceeds a preset threshold within a preset time period after the SAR sensor in the wireless charging control circuit reports a distance status, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. Thus, based on the duration of time the electronic device has been away from the wireless charging device and the magnitude of its acceleration, the triggering conditions for the energy discharge process are further restricted, thereby further ensuring the accuracy of the energy discharge process triggering.

[0140] In this embodiment, the control unit 504 is specifically used to: control the power management chip in the wireless charging control circuit to output a control signal to the discharge circuit, so as to control the switching transistor in the discharge circuit to be turned on, so that the output terminal of the rectifier circuit in the wireless charging circuit is grounded.

[0141] The embodiments provided in this application control the power management chip in the wireless charging control circuit to output a control signal to the bleeder circuit, thereby controlling the switching transistor in the bleeder circuit to conduct, and grounding the output terminal of the rectifier circuit in the wireless charging circuit. This facilitates energy dissipation from the rectifier circuit's output DC voltage when an abnormally high DC voltage occurs, by grounding the rectifier circuit's output terminal through the switching transistor. This reduces the risk of the low-dropout linear regulator overheating and burning out due to a large voltage drop.

[0142] The wireless charging control device 500 in this embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal.

[0143] The wireless charging control device 500 in this embodiment can be a device with an operating system. The operating system can be Android, iOS, or other possible operating systems; this embodiment does not specifically limit the specific operating system.

[0144] The wireless charging control device 500 provided in this application embodiment can achieve… Figure 5 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0145] Optionally, such as Figure 7 As shown, this application embodiment also provides an electronic device 600, including a processor 602 and a memory 604. The memory 604 stores a program or instructions that can run on the processor 602. When the program or instructions are executed by the processor 602, they implement the various steps of the wireless charging control method embodiment described above and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0146] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices.

[0147] Figure 8 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of this application.

[0148] Electronic device 700 includes, but is not limited to: radio frequency unit 701, network module 702, audio output unit 703, input unit 704, sensor 705, display unit 706, user input unit 707, interface unit 708, memory 709, and processor 710, etc.

[0149] Those skilled in the art will understand that the electronic device 700 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 8 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0150] The processor 710 is used to obtain the positional relationship between the electronic device and the wireless charging device, as well as the motion acceleration of the electronic device. The positional relationship includes a near state and a far state.

[0151] The processor 710 is also used to control the discharge circuit in the wireless charging control circuit to ground a portion of the wireless charging circuit when the positional relationship meets a first preset condition, or when the positional relationship and motion acceleration meet a second preset condition.

[0152] The first preset condition and the second preset condition are both used to indicate that after the electronic device disconnects from the wireless charging device, the electronic device will reconnect with the wireless charging device within a preset time period.

[0153] In this embodiment, the positional relationship between the electronic device and the wireless charging device, as well as the acceleration of the electronic device, are obtained. The positional relationship includes a near-to-near state and a far-to-far state. When the positional relationship meets a first preset condition, or when the positional relationship and acceleration meet a second preset condition, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. Both the first and second preset conditions are used to instruct the electronic device to re-establish contact with the wireless charging device within a preset time period after disconnection. This allows for the discharge of energy received by the electronic device when it is quickly picked up and placed down during wireless charging. This effectively solves the problem of excessive heat generation caused by a large voltage difference within the wireless charging circuit due to a mismatch between the output power of the wireless charging device and the load power of the electronic device when the device is quickly picked up and placed down during wireless charging, thus reducing the risk of the wireless charging circuit burning out.

[0154] Optionally, the processor 710 is specifically used to: after the SAR sensor in the wireless charging control circuit reports a distance status, within a preset time period, when the SAR sensor reports a proximity status, control the discharge circuit in the wireless charging control circuit to ground a portion of the wireless charging circuit.

[0155] In the embodiments provided in this application, after the SAR sensor in the wireless charging control circuit reports a distance status, within a preset time period, if the SAR sensor reports a proximity status, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. In this way, based on the positional relationship between the electronic device and the wireless charging device, the contact status between the electronic device and the wireless charging device is determined, ensuring the accuracy of the energy discharge process triggering.

[0156] Optionally, the processor 710 is specifically used to: within a preset time period after the SAR sensor in the wireless charging control circuit reports a distance status, if the motion acceleration of the electronic device is greater than a preset threshold, control the discharge circuit in the wireless charging control circuit to ground part of the wireless charging circuit.

[0157] In the embodiments provided in this application, if the acceleration of the electronic device exceeds a preset threshold within a preset time period after the SAR sensor in the wireless charging control circuit reports a distance status, the discharge circuit in the wireless charging control circuit is controlled to ground a portion of the wireless charging circuit. Thus, based on the duration of time the electronic device has been away from the wireless charging device and the magnitude of its acceleration, the triggering conditions for the energy discharge process are further restricted, thereby further ensuring the accuracy of the energy discharge process triggering.

[0158] Optionally, the processor 710 is specifically used to: control the power management chip in the wireless charging control circuit to output a control signal to the discharge circuit, so as to control the switching transistor in the discharge circuit to turn on, thereby grounding the output terminal of the rectifier circuit in the wireless charging circuit.

[0159] The embodiments provided in this application control the power management chip in the wireless charging control circuit to output a control signal to the bleeder circuit, thereby controlling the switching transistor in the bleeder circuit to conduct, and grounding the output terminal of the rectifier circuit in the wireless charging circuit. This facilitates energy dissipation from the rectifier circuit's output DC voltage when an abnormally high DC voltage occurs, by grounding the rectifier circuit's output terminal through the switching transistor. This reduces the risk of the low-dropout linear regulator overheating and burning out due to a large voltage drop.

[0160] It should be understood that, in this embodiment, the input unit 704 may include a graphics processing unit (GPU) 7041 and a microphone 7042. The GPU 7041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 706 may include a display panel 7061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also called a touch screen. The touch panel 7071 may include a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0161] The memory 709 can be used to store software programs and various data. The memory 709 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 709 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 709 in the embodiments of this application includes, but is not limited to, these and any other suitable types of memory.

[0162] Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 710.

[0163] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the wireless charging control method embodiments described above and achieve the same technical effects. To avoid repetition, they will not be described again here.

[0164] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0165] This application also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described wireless charging control method embodiments and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0166] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0167] This application provides a computer program product, which is stored in a storage medium and executed by at least one processor to implement the various processes of the wireless charging control method embodiments described above, and can achieve the same technical effects. To avoid repetition, it will not be described again here.

[0168] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0169] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A wireless charging control circuit, characterized in that, The wireless charging control circuit, used in electronic devices, includes: Wireless charging coil; A wireless charging circuit is connected to the wireless charging coil; A discharge circuit is connected to the wireless charging circuit. A sensor module is used to detect the positional relationship between the electronic device and the wireless charging device, as well as the motion acceleration of the electronic device. A power control circuit is connected to the wireless charging circuit, the discharge circuit and the sensor module respectively. The power control circuit is used to control the discharge circuit to ground part of the wireless charging circuit when the position relationship meets a first preset condition or the position relationship and the motion acceleration meet a second preset condition. The first preset condition and the second preset condition are both used to indicate that after the electronic device disconnects from the wireless charging device, the electronic device will reconnect with the wireless charging device within a preset time period.

2. The wireless charging control circuit according to claim 1, characterized in that, The sensor module includes: A SAR sensor, connected to the power control circuit, is used to detect the positional relationship between the wireless charging device and the electronic device, the positional relationship including a close-in state and a far-out state; A motion sensor, connected to the power control circuit, is used to detect the motion acceleration of the electronic device.

3. The wireless charging control circuit according to claim 2, characterized in that, The first preset condition includes: after the SAR sensor reports a far-away state, the SAR sensor reports a near-away state within the preset time period.

4. The wireless charging control circuit according to claim 2, characterized in that, The second preset condition includes: within the preset time period after the SAR sensor reports a distance status, the motion acceleration of the electronic device is greater than a preset threshold.

5. The wireless charging control circuit according to any one of claims 1 to 4, characterized in that, The wireless charging circuit includes: A rectifier circuit, the input terminal of which is connected to the wireless charging coil; A low-dropout linear regulator, wherein the input terminal of the low-dropout linear regulator is connected to the output terminal of the rectifier circuit and the bleeder circuit respectively, and the output terminal of the low-dropout linear regulator is connected to the power control circuit.

6. The wireless charging control circuit according to claim 5, characterized in that, The discharge circuit includes: A switching transistor is provided, with its first terminal connected between the output terminal of the rectifier circuit and the input terminal of the low dropout linear regulator, and its second terminal grounded. When the switching transistor is turned on, the output terminal of the rectifier circuit is grounded through the switching transistor.

7. The wireless charging control circuit according to claim 6, characterized in that, The power control circuit includes: A power management chip is connected to both the wireless charging circuit and the discharge circuit. The processor is connected to the sensor module and the power management chip respectively, and is used to control the power management chip to output a control signal to the discharge circuit when the positional relationship meets the first preset condition or the positional relationship and the motion acceleration meet the second preset condition, so as to control the switching transistor to be turned on and the output terminal of the rectifier circuit to be grounded.

8. The wireless charging control circuit according to claim 7, characterized in that, The discharge circuit also includes: The first resistor is connected to the control terminal of the switching transistor and the power management chip, respectively. The second resistor has its first end connected between the output terminal of the power management chip and the input terminal of the first resistor, and its second end grounded.

9. An electronic device, characterized in that, include: The wireless charging control circuit as described in any one of claims 1 to 8.

10. A wireless charging control method, characterized in that, The wireless charging control method, applied to the wireless charging control circuit as described in any one of claims 1 to 8, comprises: The positional relationship between the electronic device and the wireless charging device, as well as the motion acceleration of the electronic device, are obtained. The positional relationship includes a close-to-close state and a far-from-close state. When the positional relationship meets the first preset condition, or when the positional relationship and the motion acceleration meet the second preset condition, the discharge circuit in the wireless charging control circuit is controlled to ground part of the wireless charging circuit. The first preset condition and the second preset condition are both used to indicate that after the electronic device disconnects from the wireless charging device, the electronic device will reconnect with the wireless charging device within the preset time period.

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