Wireless charging circuit, device and system and electronic equipment

Abstract

The invention relates to a wireless charging circuit, device and system and electronic equipment, and the wireless charging circuit comprises a rectification module, the input end of the rectification module is used for being connected with a resonance circuit, and the rectification module is used for converting the energy received by the resonance circuit into half-wave energy; and the input end of the sampling module is connected with the output end of the rectification module, and the half-wave energy supplies power to and / or charges a load through the sampling module. The rectification module is directly connected with the sampling module, the rectification module is used for converting the energy received by the resonance circuit into the half-wave energy, the half-wave energy supplies power to and / or charges the load through the sampling module, arrangement of a converter is avoided, and the problem that the converter occupies a relatively large area of a chip and is inconvenient to charge is solved. Therefore, the problem that the power loss is relatively large in the chip operation process is solved, and the working efficiency is directly improved.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless charging technologies, and in particular, to a wireless charging circuit, device, system, and electronic device. Background Art

[0002] With the development of technology, more and more electronic devices such as tablet computers and mobile phones have wireless charging functions. As a new charging method, wireless charging has advantages such as convenient charging, and the user's demand for wireless charging is also increasing. Wireless charging has become one of the essential charging methods for electronic devices such as tablet computers and mobile phones.

[0003] Currently, there are various architecture designs for wireless charging systems of intelligent devices. Energy can be received through a wireless charging coil and a receiving chip and converted into electrical energy. The energy is converted into a voltage in the required mode through a rectifier bridge switch and a converter inside the receiving chip. Then, through a PMIC (Power Management Integrated Circuit) power management chip or a charge pump power converter, it is converted into the system required voltage or current and electrical energy.

[0004] However, since the converter inside the receiving chip occupies a relatively large area of the chip, the power loss during the operation of the chip is relatively large, directly reducing the working efficiency. Summary of the Invention

[0005] To overcome the problems existing in the related art, the present disclosure provides a wireless charging circuit, device, system, and electronic device.

[0006] According to a first aspect of an embodiment of the present disclosure, a wireless charging circuit is provided, including: a rectification module, an input end of the rectification module is used to be connected to a resonant circuit, and the rectification module is used to convert the energy received by the resonant circuit into half-wave energy; a sampling module, an input end of the sampling module is connected to an output end of the rectification module, and the half-wave energy supplies power to and / or charges a load through the sampling module.

[0007] In some possible implementation manners, the sampling module is a current sampling module, and the current sampling module is used to monitor an output current of the rectification module.

[0008] In some possible implementation manners, the wireless charging circuit further includes: a conversion circuit, an input end of the conversion circuit is connected to an output end of the sampling module, and an output end of the conversion circuit supplies power to and / or charges the load.

[0009] In some possible embodiments, the conversion circuit includes: a voltage regulation module for converting the half-wave energy into a first stable voltage, the input end of the voltage regulation module being connected to the output end of the sampling module; and a conversion module for adjusting the first stable voltage to a second stable voltage, the input end of the conversion module being connected to the output end of the voltage regulation module, and the output end of the conversion module being connected to the load.

[0010] In some possible embodiments, the voltage regulation module includes: a first switch; an operational amplifier, the output end of the operational amplifier being connected to the first end of the first switch; and a branch, the first input end of the operational amplifier being connected to the branch, and the second end of the first switch being connected to the branch.

[0011] In some possible embodiments, the branch includes a first resistor and a second resistor connected in series. One end of the first resistor is connected to the second end of the first switch, the other end of the first resistor is connected to one end of the second resistor, the first input end of the operational amplifier is connected to the connection point of the first resistor and the second resistor, and the other end of the second resistor is grounded.

[0012] In some possible embodiments, the first switch is a MOS transistor.

[0013] In some possible embodiments, the conversion module is a charge pump.

[0014] In some possible embodiments, the rectification module is a rectifier bridge.

[0015] According to a second aspect of the embodiments of the present disclosure, there is provided a wireless charging device, including: the wireless charging circuit as described in any one of the embodiments in the first aspect above.

[0016] According to a third aspect of the embodiments of the present disclosure, there is provided a wireless charging system, including: a wireless charging transmitting device; and a wireless charging receiving device, the wireless charging receiving device including the wireless charging circuit as described in any one of the embodiments in the first aspect above, and the wireless charging transmitting device being configured to inductively transmit wireless charging energy to the receiving input end of the wireless charging circuit.

[0017] According to a fourth aspect of the embodiments of the present disclosure, there is provided an electronic device, including: a load; and the wireless charging circuit as described in any one of the embodiments in the first aspect above, the wireless charging circuit being connected to the load, and the rectification module converting the energy received by the resonance circuit into half-wave energy to supply power and / or charge the load.

[0018] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects: The present disclosure provides a wireless charging circuit. The input end of the rectification module is used to connect to the resonance circuit, and the rectification module is used to convert the energy received by the resonance circuit into half-wave energy. The input end of the sampling module is connected to the output end of the rectification module, and the half-wave energy supplies power to and / or charges the load through the sampling module. By directly connecting the rectification module and the sampling module, the rectification module converts the energy received by the resonance circuit into half-wave energy to supply power to and / or charge the load through the sampling module, avoiding the setting of a converter, solving the problem that the area of the chip occupied by the converter is relatively large, resulting in relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0019] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0021] Figure 1 is a schematic diagram of a wireless charging circuit in the related art.

[0022] Figure 2 is a schematic diagram of a wireless charging circuit shown according to an exemplary embodiment.

[0023] Figure 3 is a schematic diagram of another wireless charging circuit shown according to an exemplary embodiment.

[0024] Figure 4 is a schematic diagram of yet another wireless charging circuit shown according to an exemplary embodiment.

[0025] Figure 5 is a circuit diagram of a voltage stabilization module shown according to an exemplary embodiment.

[0026] Figure 6 is a circuit diagram of another voltage stabilization module shown according to an exemplary embodiment.

[0027] Figure 7 is a circuit diagram of yet another voltage stabilization module shown according to an exemplary embodiment.

[0028] Figure 8 is a wireless charging system shown according to an exemplary embodiment.

[0029] REFERENCE SIGNS:

[0030] 1. Rectifier bridge switch; 2. Converter;

[0031] 10. Rectifier module; 20. Sampling module; 30. Resonant circuit; 40. Load; 50. Conversion circuit; 51. Voltage regulation module; 501. First switch; 502. Operational amplifier; 503. Branch; 52. Conversion module; 60. Processor; 601. First interface; 602. Second interface; 603. Third interface; 604. Fourth interface; 70. Interface; 80. Control module;

[0032] 100. Wireless charging transmitting device; 101. Power conversion module; 200. Wireless charging receiving device; 201. Power receiving module. Specific embodiments

[0033] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] With the development of electronic technology, the performance of electronic devices has been increasingly improved. More and more users like to use electronic devices to complete various things, which leads to excessive power consumption of electronic devices and requires timely charging. To improve the convenience of charging electronic devices, wireless charging technology applied to electronic devices has emerged and been widely used. When charging an electronic device using wireless charging technology, it is not necessary to connect the electronic device to a power adapter through a wire. The electronic device can be directly placed on the charging base to complete charging.

[0035] In related technologies, there are various architecture designs for wireless charging systems. Energy can be received through a wireless charging coil and a receiving chip and converted into electrical energy. As Figure 1 shown, the energy is converted into a voltage in the required mode through the rectifier bridge switch 1 and the converter 2 inside the receiving chip. Then, it is converted into the system required voltage or current and electrical energy through a PMIC (Power Management Integrated Circuit) power management chip or a charge pump power converter charge pump.

[0036] However, since the converter 2 inside the receiving chip occupies a relatively large area of the chip, the power loss during the operation of the chip is relatively large, directly reducing the working efficiency.

[0037] To solve the above technical problems, according to a first aspect of the present disclosure, there is provided a wireless charging circuit, including: a rectification module, an input end of the rectification module is used to be connected to a resonant circuit, and the rectification module is configured to convert the energy received by the resonant circuit into half-wave energy; a sampling module, an input end of the sampling module is connected to an output end of the rectification module, and the half-wave energy supplies power to and / or charges a load through the sampling module.

[0038] In the present disclosure, the rectification module is directly connected to the sampling module. The rectification module is configured to convert the energy received by the resonant circuit into half-wave energy and supply power to and / or charge the load through the sampling module, avoiding the setting of a converter, solving the problem that the area of the chip occupied by the converter is relatively large, resulting in relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0039] According to a second aspect of the present disclosure, there is provided a wireless charging device, including: the wireless charging circuit in any one of the above first aspect embodiments.

[0040] Applied to the wireless charging technology scenario. This scenario includes a wireless charging device and a device to be charged. Among them, the wireless charging device is used to charge the device to be charged with wireless charging function. For example, the wireless charging device can be a wireless charging mobile power supply, a wireless charging board, a wireless charger, etc., and the device to be charged can be a mobile phone, a tablet, a laptop computer, a personal digital assistant (PDA for short), an in-vehicle computer, a smart wearable device (such as a smart watch, a smart bracelet, headphones, etc.), virtual reality (VR), augmented reality (AR), etc. electronic devices with a built-in rechargeable battery. The above device to be charged can also be a wireless charging electric vehicle, a wireless charging household appliance (such as a floor cleaning robot, etc.), a drone and other electronic products. Again, the wireless charging device can be a tablet, a laptop computer, a mobile phone, etc., and the device to be charged can be a stylus, a magnetic keyboard, etc.

[0041] According to a third aspect of the present disclosure, there is provided a wireless charging system, including: a wireless charging transmitting device; and a wireless charging receiving device, the wireless charging receiving device includes the wireless charging circuit in any one of the above first aspect embodiments, and the wireless charging transmitting device is configured to inductively transmit wireless charging energy to the receiving input end of the wireless charging circuit.

[0042] A wireless charging system can be applied to an electronic device to charge loads such as a battery and electronic components in the electronic device. The electronic device can include, but is not limited to, a mobile phone, a wearable device, an electric toothbrush, a tablet computer, etc. The wireless charging system can include a wireless charging transmitting device and a wireless charging receiving device, where the wireless charging transmitting device can also be referred to as a transmitting end, and the wireless charging receiving device can also be referred to as a receiving end.

[0043] According to a fourth aspect of the present disclosure, there is provided an electronic device, including: a load; and a wireless charging circuit as in any one of the embodiments in the first aspect above, the wireless charging circuit is connected to the load, and the rectification module converts the energy received by the resonant circuit into half-wave energy to supply power and / or charge the load.

[0044] The electronic device can be an electronic device with a built-in rechargeable battery such as a mobile phone, a tablet, a laptop computer, a personal digital assistant (PDA for short), an in-vehicle computer, a smart wearable device (such as a smart watch, a smart bracelet, earphones, etc.), virtual reality (VR), augmented reality (AR), etc. The electronic device can also be an electronic product such as a wireless charging electric vehicle, a wireless charging household appliance (such as a floor cleaning robot, etc.), a drone, etc. For another example, the electronic device can be a tablet, a laptop computer, a mobile phone, etc., and the electronic device can be a stylus, a magnetic keyboard, etc.

[0045] As Figure 2 shown, according to a first aspect of the present disclosure, there is provided a wireless charging circuit, including: a rectification module 10 and a sampling module 20.

[0046] The input end of the rectification module 10 is used to be connected to the resonant circuit 30, and the rectification module 10 is used to convert the energy received by the resonant circuit 30 into half-wave energy; the input end of the sampling module 20 is connected to the output end of the rectification module 10, and the half-wave energy supplies power and / or charges the load 40 through the sampling module 20.

[0047] Among them, the rectification module 10 is used to convert the energy received by the resonant circuit 30 into half-wave energy, and the rectification module 10 can be a rectifier bridge composed of rectifier diodes. The rectification module 10 can also be a rectifier bridge composed of rectifier transistors. Of course, in other embodiments, the rectification module 10 can also adopt a rectification circuit composed of other devices, and the present disclosure does not make specific limitations on this.

[0048] The resonant circuit 30 includes a wireless charging coil L and a capacitor C1 connected in series. The resonant circuit 30 receives energy through the wire charging coil L and resonates through the capacitor C1 to be converted into electric energy, that is, half-wave energy.

[0049] The half-wave energy powers and / or charges the load 40 through the sampling module 20. The sampling module 20 can be used to detect the current output by the rectification module 10 or the voltage output by the rectification module 10. The present disclosure does not make specific limitations thereto.

[0050] The load 40 can include, but is not limited to: a battery, various processors or other types of devices that drive the operation of electronic devices, such as a Graphics Processing Unit (GPU), a Central Processing Unit (CPU), an arithmetic accelerator, or various digital circuits and analog circuits, etc.; the load 40 can also be various integrated circuit chips, and the integrated circuit chips include, but are not limited to, artificial intelligence chips, image processing chips, etc. The present disclosure does not make specific limitations thereto.

[0051] Both the rectification module 10 and the sampling module 20 are electrically connected to the control module 80. The control module 80 is electrically connected to the processor 60 through the first interface 601, the second interface 602, the third interface 603, and the fourth interface 604. The control module 80 can be a Microcontroller Unit (MCU), the processor 60 can be an Application Processor (AP) processor, and the first interface 601, the second interface 602, the third interface 603, and the fourth interface 604 can be any one of an ADC (Analog-to-Digital Converter) interface, a GPIO (General Purpose Input / Output Port) interface, a Protection interface, an I 2 C (Inter-Integrated Circuit) interface.

[0052] In the present disclosure, by directly connecting the rectification module 10 and the sampling module 20, the rectification module 10 is used to convert the energy received by the resonant circuit 30 into half-wave energy and power and / or charge the load 40 through the sampling module 20, avoiding the setting of a converter, solving the problem that the area of the chip occupied by the converter is relatively large, resulting in a relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0053] In some possible implementation manners, as Figure 2-3 shown, the sampling module 20 is a current sampling module, and the current sampling module is used to monitor the output current of the rectification module 10.

[0054] Among them, the current sampling module is used to monitor the output current of the rectification module 10 to ensure that the output current of the wireless charging circuit is stable within a specified current range to supply power to and / or charge the load 40. Of course, in other embodiments, the sampling module 20 may also be a voltage sampling module, and the voltage sampling module is used to monitor the output voltage VOUT of the rectification module 10 to ensure that the output voltage of the wireless charging circuit is stable within a specified voltage range to supply power to and / or charge the load 40.

[0055] In the embodiment of the present disclosure, the half-wave energy supplies power to and / or charges the load 40 through the sampling module 20. The sampling module 20 can be used to monitor the output current of the rectification module 10 to ensure that the output current of the wireless charging circuit is stable within a specified current range to supply power to and / or charge the load 40.

[0056] In some possible implementation manners, such as Figure 2-4 shown, the wireless charging circuit further includes: a conversion circuit 50.

[0057] The input end of the conversion circuit 50 is connected to the output end of the sampling module 20, and the output end of the conversion circuit 50 supplies power to and / or charges the load 40.

[0058] Among them, the conversion circuit 50 is connected to the processor 60. The conversion circuit 50 can be one or multiple in parallel to realize system power supply and battery charging under multiple paths. The embodiments of the present disclosure do not make specific limitations thereto.

[0059] The conversion circuit 50 can be a DC-DC conversion circuit. The DC-DC conversion circuit includes, but is not limited to, voltage conversion circuits such as a buck circuit, a boost circuit, or a boost-buck circuit. The conversion circuit 50 can also be a charge pump circuit. The embodiments of the present disclosure do not make specific limitations thereto.

[0060] Exemplarily, referring to Figure 2-3 , in a specific scenario, the conversion circuit 50 is one. By outputting half-wave energy through the rectification module 10 via the sampling module 20 to achieve the purpose of reducing power loss. In order to improve the voltage stabilization of the half-wave energy, it is converted into a stable voltage through the conversion circuit 50. The conversion circuit 50 has the function of adjustable voltage / current. For example, a DC-DC converter can stabilize the voltage or current at a specified voltage / current; an LDO (Low Dropout Regulator) converter can stabilize the voltage or current at a specified voltage / current. Then it is converted into the power supply required by the system or the battery. For example, it can be converted into the power supply required by the system or the battery through an N:1 charge pump converter to improve the power supply stability, realize system power supply and battery charging, and thus is beneficial to the stable operation of the load 40.

[0061] Exemplarily, with reference to Figure 4 , in a specific scenario, there are two conversion circuits 50. The two conversion circuits 50, the rectification module 10, and the sampling module 20 are all connected to the processor 60 through Comm communication. For example, the conversion circuits 50 are a buck circuit and a charge pump circuit connected in parallel. By outputting half-wave energy through the rectification module 10 via the sampling module 20, the purpose of reducing power loss is achieved. To improve the voltage stabilization of the half-wave energy, it is converted into a stable voltage in the conversion circuit 50. The conversion circuit 50 has a voltage / current adjustable function. For example, in the buck circuit, Q2 can be a DC-DC converter, which can stabilize the voltage or current at a specified voltage / current. Q2 can also be an LDO (Low Dropout Regulator) converter, which can stabilize the voltage or current input through the interface 70 or the voltage or current output through the sampling module 20 at a specified voltage / current. Then it is converted into the power supply required by the system or the battery. For example, it can be converted into the power supply required by the system or the battery through a DC-DC converter, improving the power supply stability, realizing system power supply and battery charging, and thus facilitating the stable operation of the load 40. In the charge pump circuit, Q1 can be a DC-DC converter, which can stabilize the voltage or current at a specified voltage / current. Q1 can also be an LDO (Low Dropout Regulator) converter, which can stabilize the voltage or current at a specified voltage / current. Then it is converted into the power supply required by the system or the battery. For example, it can be converted into the power supply required by the system or the battery through an N:1 charge pump converter, improving the power supply stability, realizing system power supply and battery charging, and thus facilitating the stable operation of the load 40.

[0062] In some possible implementation manners, as Figure 3-4 shown, the conversion circuit 50 includes: a voltage stabilization module 51 and a conversion module 52.

[0063] The voltage stabilization module 51 is used to convert the half-wave energy into a first stable voltage. The input end of the voltage stabilization module 51 is connected to the output end of the sampling module 20; the conversion module 52 is used to adjust the first stable voltage to a second stable voltage. The input end of the conversion module 52 is connected to the output end of the voltage stabilization module 51, and the output end of the conversion module 52 is connected to the load 40.

[0064] Among them, the voltage stabilization module 51 can be a module with voltage adjustment ability, specifically, it can be an LDO (Low Dropout Regulator) converter, or a DC-DC converter. The DC-DC converter includes, but is not limited to: a buck converter, a boost converter, or a boost-buck converter, etc. The voltage stabilization module 51 can also be a charge pump. The embodiments of the present disclosure do not make specific limitations on this.

[0065] The conversion module 52 can be a DC-DC converter. The DC-DC converter includes, but is not limited to: a buck converter, a boost converter, or a boost-buck converter, etc. The conversion module 52 can also be a charge pump. The embodiments of the present disclosure do not make specific limitations on this.

[0066] The first stable voltage is the voltage obtained by converting half-wave energy into a stable voltage; the second stable voltage is the voltage or current stabilized within a specified voltage range.

[0067] In the embodiments of the present disclosure, when the half-wave energy output by the rectification module 10 through the sampling module 20 has an unstable voltage, the voltage stabilization module 51 converts the half-wave energy into the first stable voltage, avoiding the abnormal operation of the load 40 caused by the unstable voltage provided to the load 40. By setting the conversion module 52, the first stable voltage can be adjusted to the second stable voltage for further voltage stabilization, improving the power supply stability, and thus facilitating the stable operation of the load 40.

[0068] In some possible implementation manners, as Figure 5-7 shown, the voltage stabilization module 51 includes: a first switch 501, an operational amplifier 502, and a branch 503.

[0069] The output end of the operational amplifier 502 is connected to the first end of the first switch 501; the first input end of the operational amplifier 502 is connected to the branch 503, and the second end of the first switch 501 is connected to the branch 503.

[0070] Among them, the first switch 501 can be implemented by a field effect transistor, and the field effect transistor can be a P-MOS transistor or an N-MOS transistor. The embodiments of the present disclosure do not make specific limitations on this.

[0071] The output terminal of the operational amplifier 502 is connected to the first end of the first switch 501, and the first end of the first switch 501 can be the gate G. The first input terminal of the operational amplifier 502 is connected to the branch 503. The first input terminal of the operational amplifier 502 can be the non-inverting input terminal or the inverting input terminal. The second end of the first switch 501 is connected to the branch 503, and the second end of the first switch 501 can be the source S or the drain D.

[0072] Exemplarily, the voltage regulation module 51 can be an LDO converter, such as Figure 5 shown, IN is the input terminal of the LDO converter, OUT is the output terminal of the LDO converter, GND is the ground. The first switch 501 can be a P-MOS transistor. There is a first switch 501 driving module connected between the output terminal of the operational amplifier 502 and the gate G of the first switch 501. When the non-inverting input terminal (i.e., the positive terminal) input voltage V+ of the operational amplifier 502 is greater than the inverting input terminal (i.e., the negative terminal) input voltage V-, the output is high level, and the driving module drives the first switch 501 to cut off. The non-inverting input terminal (i.e., the positive terminal) input voltage V+ of the operational amplifier 502 is connected to the branch 503, and the inverting input terminal (i.e., the negative terminal) input voltage V- is V REF , when the non-inverting input terminal (i.e., the positive terminal) input voltage V+ of the operational amplifier 502 is less than the inverting input terminal (i.e., the negative terminal) input voltage V-, the output is low level, and the driving module drives the first switch 501 to conduct. The first switch 501 can also be an N-MOS transistor. There is a first switch 501 driving module connected between the output terminal of the operational amplifier 502 and the gate G of the first switch 501. When the non-inverting input terminal (i.e., the positive terminal) input voltage V+ of the operational amplifier 502 is greater than the inverting input terminal (i.e., the negative terminal) input voltage V-, the output is high level, and the driving module drives the first switch 501 to conduct. When the non-inverting input terminal (i.e., the positive terminal) input voltage V+ of the operational amplifier 502 is less than the inverting input terminal (i.e., the negative terminal) input voltage V-, the output is low level, and the driving module drives the first switch 501 to cut off.

[0073] Exemplarily, the voltage regulation module 51 can be an LDO converter, such as Figure 6 shown, V IN is the input terminal of the LDO converter, V OUT is the output terminal of the LDO converter, GND is the ground. The first switch 501 can be implemented by a field effect transistor. The output terminal of the operational amplifier 502 is connected to the gate G of the first switch 501. The positive terminal input voltage of the operational amplifier 502 is V REF , the negative terminal input voltage is connected to the branch 503. When the non-inverting input terminal (i.e., the positive terminal) input voltage V REF of the operational amplifier 502 is greater than the inverting input terminal (i.e., the negative terminal) input voltage V-, the output is high level. When the non-inverting input terminal (i.e., the positive terminal) input voltage V REFWhen it is less than the input voltage V- of the inverting input terminal, i.e., the negative terminal, the output is at a low level, and the first switch 501 conducts or cuts off.

[0074] Exemplarily, the voltage regulation module 51 can be an LDO converter, such as Figure 7 shown, V IN is the input terminal of the LDO converter, V OUT is the output terminal of the LDO converter, GND is grounded, the first switch 501 can be implemented by a field effect transistor, the output terminal of the operational amplifier 502 is connected to the gate G of the first switch 501, the non-inverting input terminal of the operational amplifier 502, i.e., the positive input voltage V+, is connected to the branch 503, and the inverting input terminal, i.e., the negative input voltage, is V REF , when the non-inverting input terminal of the operational amplifier 502, i.e., the positive input voltage, is greater than the inverting input terminal, i.e., the negative input voltage V REF , the output is at a high level. When the non-inverting input terminal of the operational amplifier 502, i.e., the positive input voltage, is less than the inverting input terminal, i.e., the negative input voltage V REF , the output is at a low level, and the first switch 501 conducts or cuts off.

[0075] In some possible implementation manners, such as Figure 5-7 shown, the branch 503 includes a first resistor R1 and a second resistor R2 connected in series. One end of the first resistor R1 is connected to the second end of the first switch 501, the other end of the first resistor R1 is connected to one end of the second resistor R2, the first input terminal of the operational amplifier 502 is connected to the connection point of the first resistor R1 and the second resistor R2, and the other end of the second resistor R2 is grounded.

[0076] Among them, the first switch 501 can be implemented by a field effect transistor. The field effect transistor can be a P-MOS transistor or an N-MOS transistor. The second end of the first switch 501 can be the source electrode S or the drain electrode D. The embodiments of the present disclosure do not make specific limitations on this.

[0077] Exemplarily, as Figure 5 shown, one end of the first resistor R1 is connected to the source electrode S of the first switch 501, the other end of the first resistor R1 is connected to one end of the second resistor R2, the first input terminal of the operational amplifier 502 can be the non-inverting input terminal, the first input terminal of the operational amplifier 502 is connected to the connection point of the first resistor R1 and the second resistor R2, the second input terminal of the operational amplifier 502 is the inverting input terminal, and the inverting input terminal is connected to V REF , the other end of the second resistor R2 is grounded. At this time, the output voltage V OUT of the voltage regulation module 51 = V REF × (1 + R1 / R2), has the voltage adjustment ability, and can stabilize the voltage within a specified voltage range.

[0078] Exemplarily, as Figure 6 shown, one end of the first resistor R1 is connected to the source S of the first switch 501, the other end of the first resistor R1 is connected to one end of the second resistor R2, the first input terminal of the operational amplifier 502 can be the inverting input terminal, the first input terminal of the operational amplifier 502 is connected to the connection point of the first resistor R1 and the second resistor R2, the second input terminal of the operational amplifier 502 is the non-inverting input terminal, and the non-inverting input terminal is connected to V REF , the other end of the second resistor R2 is grounded. At this time, the output voltage V OUT = V REF ×(1 + R1 / R2), has the voltage adjustment ability, and can stabilize the voltage within a specified voltage range.

[0079] Exemplarily, as Figure 7 shown, one end of the first resistor R1 is connected to the drain D of the first switch 501, the other end of the first resistor R1 is connected to one end of the second resistor R2, the first input terminal of the operational amplifier 502 can be the non-inverting input terminal, the first input terminal of the operational amplifier 502 is connected to the connection point of the first resistor R1 and the second resistor R2, the second input terminal of the operational amplifier 502 is the inverting input terminal, and the inverting input terminal is connected to V REF , the other end of the second resistor R2 is grounded. At this time, the output voltage V OUT = V REF ×(1 + R1 / R2), has the voltage adjustment ability, and can stabilize the voltage within a specified voltage range.

[0080] In some possible implementation manners, the first switch 501 is a MOS transistor.

[0081] Among them, MOS is the abbreviation of MOSFET. MOSFET is Metal-Oxide-Semiconductor Field-Effect Transistor, also known as Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET). The MOS transistor can be a P-MOS transistor or an N-MOS transistor, and the embodiments of the present disclosure do not make specific limitations in this regard.

[0082] In the embodiments of the present disclosure, the first switch 501 has the voltage adjustment ability, can stabilize the voltage within a specified voltage range, improves the voltage stabilization of the half-wave energy, and avoids the abnormal operation of the load 40 caused by the unstable voltage provided to the load 40.

[0083] In some possible implementation manners, the conversion module 52 is a charge pump.

[0084] Among them, the charge pump has voltage conversion functions such as boosting and bucking. The charge pump can be an N:1 charge pump. Specifically, the charge pump can be a 1:2 charge pump, a 2:1 charge pump, a 1:4 charge pump, a 4:1 charge pump, etc. The embodiments of the present disclosure do not make specific limitations on this.

[0085] In the embodiments of the present disclosure, by setting the conversion module 52, the voltage required by the system or the battery can be converted to achieve the power supply and charging capabilities. At the same time, the conversion module 52 adjusts the first stable voltage output by the voltage stabilization module 51 to a second stable voltage for further voltage stabilization, improving the power supply stability, thereby facilitating the stable operation of the load 40.

[0086] In some possible implementation manners, such as Figure 2-3 shown, the rectification module 10 is a rectifier bridge.

[0087] It should be noted that the rectifier bridge can be a rectifier bridge composed of rectifier diodes. The rectifier bridge can also be a rectifier bridge composed of rectifier transistors. Of course, in other embodiments, the rectifier bridge can also adopt a rectifier circuit composed of other devices. The embodiments of the present disclosure do not make specific limitations on this.

[0088] Exemplarily, such as Figure 2 shown, the rectifier bridge can be composed of rectifier transistors q1, q2, q3, and q4. The rectifier bridge is used to convert the energy received by the resonant circuit 30 into half-wave energy and supply power and / or charge the load 40 through the sampling module 20, avoiding the setting of a converter, solving the problem that the area occupied by the converter in the chip is relatively large, resulting in relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0089] Exemplarily, such as Figure 3 shown, the rectifier bridge can be composed of rectifier diodes D1, D2, D3, and D4 connected end to end in sequence. The rectifier bridge is used to convert the energy received by the resonant circuit 30 into half-wave energy and supply power and / or charge the load 40 through the sampling module 20, avoiding the setting of a converter, solving the problem that the area occupied by the converter in the chip is relatively large, resulting in relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0090] According to a second aspect of the present disclosure, there is provided a wireless charging device, including: the wireless charging circuit in any one of the above-mentioned first aspect embodiments.

[0091] Among them, the wireless charging device is used to charge a device to be charged with a wireless charging function. For example, the wireless charging device can be a wireless charging mobile power supply, a wireless charging board, a wireless charger, etc., and the device to be charged can be a mobile phone, a tablet computer, a notebook computer, a personal digital assistant (PDA for short), an in-vehicle computer, a smart wearable device (such as a smart watch, a smart bracelet, earphones, etc.), virtual reality (VR), augmented reality (AR), and other electronic devices with a built-in rechargeable battery. The above-mentioned device to be charged can also be an electronic product such as a wireless charging electric vehicle, a wireless charging household appliance (such as a floor cleaning robot, etc.), a drone, etc. For another example, the wireless charging device can be a tablet computer, a notebook computer, a mobile phone, etc., and the device to be charged can be a stylus, a magnetic keyboard, etc.

[0092] In the present disclosure, by directly connecting the rectification module 10 and the sampling module 20, the rectification module 10 is used to convert the energy received by the resonance circuit 30 into half-wave energy and supply power and / or charge the load 40 through the sampling module 20, avoiding the setting of a converter, solving the problem that the area of the chip occupied by the converter is relatively large, resulting in a relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0093] According to the third aspect of the present disclosure, a wireless charging system is provided, as Figure 8 shown, the wireless charging system includes: a wireless charging transmitting device 100 and a wireless charging receiving device 200.

[0094] The wireless charging receiving device 200 includes a wireless charging circuit in any one of the embodiments of the first aspect as described above, and the wireless charging transmitting device 100 is used to inductively transmit wireless charging energy to the receiving input end of the wireless charging circuit.

[0095] Among them, the wireless charging transmitting device 100 can also be called a transmitting end, and the wireless charging receiving device 200 can also be called a receiving end. The transmitting end can be arranged in a charging base, and the receiving end can be arranged in an electronic device. The transmitting end and the receiving end in the wireless charging system can be produced and sold independently. For example, the transmitting end and a power adapter are arranged in products such as a charging base for sale, and the receiving end is arranged in an electronic device for sale.

[0096] The wireless charging system can be applied to an electronic device to charge loads such as a battery and electronic components in the electronic device. The electronic device can include but is not limited to: a mobile phone, a wearable device, an electric toothbrush, a tablet computer, etc.

[0097] It should be noted that the transmitting end includes a power conversion module 101, and the receiving end includes a power receiving module 201. The power conversion module 101 transfers energy to the power receiving module 201, and the receiving end transfers information to the transmitting end through load modulation; the transmitting end transfers information to the receiving end through frequency modulation. The wireless charging transmitting device 100, i.e., the transmitting end, and the wireless charging receiving device 200, i.e., the receiving end, can communicate based on the provisions of the Qi protocol introduced by the Wireless Power Consortium (WPC), a standard organization for low-frequency wireless power transmission.

[0098] In the present disclosure, the rectification module 10 is directly connected to the sampling module 20. The rectification module 10 is used to convert the energy received by the resonant circuit 30 into half-wave energy and supply power and / or charge the load 40 through the sampling module 20, avoiding the setting of a converter, solving the problem that the area of the chip occupied by the converter is relatively large, resulting in relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0099] According to a fourth aspect of the present disclosure, there is provided an electronic device, including: a load 40 and a wireless charging circuit as in any one of the embodiments in the first aspect above.

[0100] The wireless charging circuit is connected to the load 40, and the rectification module 10 converts the energy received by the resonant circuit 30 into half-wave energy to supply power and / or charge the load 40.

[0101] Among them, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA for short), an in-vehicle computer, a smart wearable device (such as a smart watch, a smart bracelet, an earphone, etc.), virtual reality (VR), augmented reality (AR), etc., which are electronic devices with a built-in rechargeable battery. The electronic device can also be a wireless charging electric vehicle, a wireless charging household appliance (such as a floor cleaning robot, etc.), a drone and other electronic products. For another example, the electronic device can be a tablet computer, a laptop computer, a mobile phone, etc., and the electronic device can be a stylus, a magnetic keyboard, etc.

[0102] In the present disclosure, the rectification module 10 is directly connected to the sampling module 20. The rectification module 10 is used to convert the energy received by the resonant circuit 30 into half-wave energy and supply power and / or charge the load 40 through the sampling module 20, avoiding the setting of a converter, solving the problem that the area of the chip occupied by the converter is relatively large, resulting in relatively large power loss during the operation of the chip, and directly improving the working efficiency.

[0103] It can be understood that in the present disclosure, "a plurality of" means two or more, and other quantifiers are similar thereto. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after. The singular forms of "a", "the", and "said" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0104] It can be further understood that the terms "first", "second", etc. are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other, and do not represent a specific order or degree of importance. In fact, the expressions such as "first" and "second" can be used interchangeably completely. For example, without departing from the scope of the present disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information.

[0105] It can be further understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "front", "rear", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0106] It can be further understood that unless otherwise specified, "connection" includes direct connection without other components between the two, and also includes indirect connection with other elements between the two.

[0107] It can be further understood that although the operations are described in a specific order in the drawings in the embodiments of the present disclosure, it should not be understood as requiring these operations to be performed in the specific order shown or in a serial order, or requiring all the operations shown to obtain the desired result. In a specific environment, multitasking and parallel processing may be beneficial.

[0108] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0109] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A wireless charging circuit, characterized in that, Comprising: A rectification module, the input end of the rectification module is used to connect to a resonant circuit, and the rectification module is used to convert the energy received by the resonant circuit into half-wave energy; A sampling module, the input end of the sampling module is connected to the output end of the rectification module, and the half-wave energy supplies power to and / or charges a load through the sampling module.

2. The wireless charging circuit according to claim 1, wherein The sampling module is a current sampling module, and the current sampling module is used to monitor the output current of the rectification module.

3. The wireless charging circuit according to claim 1, characterized in that Further comprising: A conversion circuit, the input end of the conversion circuit is connected to the output end of the sampling module, and the output end of the conversion circuit supplies power to and / or charges the load.

4. The wireless charging circuit according to claim 3, wherein The conversion circuit includes: A voltage stabilization module, used to convert the half-wave energy into a first stable voltage, the input end of the voltage stabilization module is connected to the output end of the sampling module; and, A conversion module, used to adjust the first stable voltage to a second stable voltage, the input end of the conversion module is connected to the output end of the voltage stabilization module, and the output end of the conversion module is connected to the load.

5. The wireless charging circuit according to claim 4, wherein The voltage stabilization module includes: A first switch; An operational amplifier, the output end of the operational amplifier is connected to the first end of the first switch; and, A branch, the first input end of the operational amplifier is connected to the branch, and the second end of the first switch is connected to the branch.

6. The wireless charging circuit according to claim 5, wherein The branch includes a first resistor and a second resistor connected in series, one end of the first resistor is connected to the second end of the first switch, the other end of the first resistor is connected to one end of the second resistor, the first input end of the operational amplifier is connected to the connection point of the first resistor and the second resistor, and the other end of the second resistor is grounded.

7. The wireless charging circuit according to claim 5, wherein The first switch is a MOS transistor.

8. The wireless charging circuit according to claim 4, wherein The conversion module is a charge pump.

9. The wireless charging circuit according to claim 1, wherein The rectification module is a rectifier bridge.

10. A wireless charging device, characterized in that, Comprising: The wireless charging circuit according to any one of claims 1-9.

11. A wireless charging system, characterized in that, Comprising: A wireless charging transmitting device; And, A wireless charging receiving device, the wireless charging receiving device includes the wireless charging circuit according to any one of claims 1-9, and the wireless charging transmitting device is used to inductively transmit wireless charging energy to the receiving input end of the wireless charging circuit.

12. An electronic device, characterized in that, Comprising: A load; And, The wireless charging circuit according to any one of claims 1-9, The wireless charging circuit is connected to the load, and the rectification module converts the energy received by the resonant circuit into half-wave energy to supply power to and / or charge the load.

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