CN219164271U - Wireless charging circuit and docking station - Google Patents
Wireless charging circuit and docking station Download PDFInfo
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- CN219164271U CN219164271U CN202223503630.XU CN202223503630U CN219164271U CN 219164271 U CN219164271 U CN 219164271U CN 202223503630 U CN202223503630 U CN 202223503630U CN 219164271 U CN219164271 U CN 219164271U
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Abstract
The application belongs to the technical field of wireless charging, and provides a wireless charging circuit and a docking station. The power supply circuit includes: the wireless charging device comprises a wireless charging coil, a power supply module, a power conversion circuit, a charging feedback circuit and a quick charging adjustment circuit. In this application, through setting up the mode that charge feedback circuit can pass through the hardware in time detect whether need charge, timely control power conversion circuit output charging current signal has increased wireless charging circuit's stability, has promoted charging efficiency. The power that charges to wireless that can be timely is adjusted through setting up quick adjustment circuit that fills, and then has promoted wireless charging circuit's efficiency, realizes the quick conversion of different wireless charging power.
Description
Technical Field
The application belongs to the technical field of wireless charging, and particularly relates to a wireless charging circuit and a docking station.
Background
In recent years, the wireless charging technology has the characteristics of safety, reliability, convenience, rapidness, no insertion and extraction and mechanical abrasion in the use process and capability of effectively prolonging the service life of equipment, is widely focused by various circles and is rapidly developed.
The wireless charging technology can reduce charging time and improve customer experience while meeting customer charging convenience. However, the wireless charging power of different electronic products is different, and a common wireless charging circuit generally adopts a step-down charging chip to perform power conversion to provide charging voltage, but when electronic devices with different powers are encountered, the charging efficiency is generally low, and the conversion of the charging power cannot be realized quickly.
Disclosure of Invention
In order to solve the technical problems, the embodiment of the application provides a wireless charging circuit and a docking station, which can solve the problems that the charging power of the existing wireless charging circuit is low and the conversion of the charging power cannot be realized quickly.
A first aspect of embodiments of the present application provides a wireless charging circuit, the wireless charging circuit comprising:
a wireless charging coil;
the power supply module is used for providing an input voltage signal;
the power conversion circuit is connected with the power supply module and the wireless charging coil, and is used for receiving a charging feedback signal and the input voltage signal, converting the input voltage signal into a charging current signal according to the charging feedback signal and outputting the charging current signal to the wireless charging coil;
the charging feedback circuit is connected with the wireless charging coil and the power conversion circuit, and is used for sampling working parameters of the wireless charging coil, generating sampling signals, generating the charging feedback signals according to the sampling signals and outputting the charging feedback signals to the power conversion circuit;
the fast charge adjusting circuit is connected with the charge feedback circuit and is used for receiving the sampling signal, generating a fast charge adjusting signal according to the sampling signal and outputting the fast charge adjusting signal to the power supply module;
the power supply module is further configured to adjust a voltage of the input voltage signal according to the fast charge adjustment signal.
In one embodiment, the wireless charging circuit further comprises:
and the input filter circuit is connected with the power conversion circuit and is used for carrying out filter processing on the input voltage signal.
In one embodiment, the charge feedback circuit includes:
the sampling unit is connected with the wireless charging coil and is used for sampling the working parameters of the wireless charging coil and generating the sampling signal;
and the feedback unit is connected with the sampling unit and the power conversion circuit and is used for receiving the sampling signal, performing voltage stabilization filtering processing on the sampling signal, generating the charging feedback signal and outputting the charging feedback signal to the power conversion circuit.
In one embodiment, the fast charge adjustment circuit includes:
the comparison unit is connected with the charging feedback circuit and is used for receiving the sampling signal, comparing the voltage of the sampling signal with a preset voltage and generating a voltage comparison signal according to a comparison result;
and the adjusting unit is connected with the comparing unit and is used for receiving the voltage comparison signal and generating the quick charge adjusting signal according to the voltage comparison signal.
In one embodiment, the input filter circuit includes: a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a first resistor; wherein,,
the first end of the first capacitor, the first end of the second capacitor and the first end of the first resistor are commonly connected to the power supply module, the second end of the first capacitor and the second end of the second capacitor are grounded, the second end of the first resistor, the first end of the third capacitor and the first end of the fourth capacitor are commonly connected to the input end of the power conversion circuit, and the second end of the third capacitor, the second end of the fourth capacitor and the grounding end of the power conversion circuit are grounded.
In one embodiment, the power conversion circuit includes: a fifth capacitor, a sixth capacitor, a seventh capacitor, and a power conversion chip; wherein,,
the input pin of the power conversion chip is connected with the input filter circuit, the first bootstrap pin of the power conversion chip is connected with the fifth capacitor in series and then is connected with the first output pin of the power conversion chip, the second bootstrap pin of the power conversion chip is connected with the sixth capacitor in series and then is connected with the second output pin of the power conversion chip, the first output pin of the power conversion chip is connected with the first end of the wireless charging coil, and the second output pin of the power conversion chip is connected with the seventh capacitor in series and then is connected with the second end of the wireless charging coil.
In one embodiment, the sampling unit includes: a first diode, a second resistor, a third resistor, a fourth resistor, a fifth resistor, an eighth capacitor and a ninth capacitor; wherein,,
the first end of the first diode is connected with the first end of the wireless charging coil, the second end of the first diode is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor, the first end of the eighth capacitor and the first end of the fourth resistor in common with the feedback unit, the second end of the third resistor is grounded, the second end of the eighth capacitor is grounded, the second end of the fourth resistor is connected in series with the fifth resistor and then grounded, the first end of the ninth capacitor is connected with the second end of the fourth resistor, and the second end of the ninth capacitor is grounded.
In one embodiment, the feedback unit includes: a sixth resistor, a tenth capacitor, and an eleventh capacitor; wherein,,
the first end of the sixth resistor is connected with the sampling unit, the second end of the sixth resistor is commonly connected with the first end of the tenth capacitor and the first end of the eleventh capacitor, the second end of the tenth capacitor is grounded, and the first end of the eleventh capacitor is connected with the power conversion circuit.
In one embodiment, the adjustment unit comprises: seventh resistor, eighth resistor, ninth resistor, tenth resistor, eleventh resistor, twelfth resistor, and twelfth capacitor; wherein,,
the first end of the seventh resistor, the first end of the eighth resistor and the first end of the ninth resistor are all connected with the comparison unit, the second end of the seventh resistor, the second end of the eighth resistor, the second end of the ninth resistor and the first end of the tenth resistor are commonly connected with the power supply module, the second end of the tenth resistor, the second end of the eleventh resistor and the second end of the twelfth capacitor are all grounded, the first end of the eleventh resistor and the first end of the twelfth capacitor are commonly connected with the second end of the twelfth resistor, and the first end of the twelfth resistor is connected with the power supply module.
The embodiment of the application also provides a docking station, which comprises a docking station body and further comprises any one of the wireless charging circuits, wherein the wireless charging circuits are arranged in the docking station body.
The embodiment of the application provides a wireless charging circuit, and wireless charging circuit includes: the wireless charging device comprises a wireless charging coil, a power supply module, a power conversion circuit, a charging feedback circuit and a quick charging adjustment circuit. In this application, through setting up the mode that charge feedback circuit can pass through the hardware in time detect whether need charge, timely control power conversion circuit output charging current signal has increased wireless charging circuit's stability, has promoted charging efficiency. The power that charges to wireless that can be timely is adjusted through setting up quick adjustment circuit that fills, and then has promoted wireless charging circuit's efficiency, realizes the quick conversion of different wireless charging power.
Drawings
Fig. 1 is a schematic structural diagram of a wireless charging circuit according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a specific circuit of an input filter circuit and a power conversion circuit according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a charging feedback circuit according to another embodiment of the present disclosure;
FIG. 4 is a schematic diagram of a comparing unit according to another embodiment of the present application;
fig. 5 is a schematic circuit diagram of an adjusting unit according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present application and simplify description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is one or more than one unless specifically defined otherwise.
In recent years, the wireless charging technology has the characteristics of safety, reliability, convenience, rapidness, no insertion and extraction and mechanical abrasion in the use process and capability of effectively prolonging the service life of equipment, is widely focused by various circles and is rapidly developed.
The wireless charging technology can reduce charging time and improve customer experience while meeting customer charging convenience. However, the wireless charging power of different electronic products is different, and a common wireless charging circuit generally adopts a step-down charging chip to perform power conversion to provide charging voltage, but when electronic devices with different powers are encountered, the charging efficiency is generally low, and the conversion of the charging power cannot be realized quickly.
In order to solve the above technical problem, referring to fig. 1, an embodiment of the present application provides a wireless charging circuit, where the wireless charging circuit includes: the power supply module 10, the power conversion circuit 20, the wireless charging coil 30, the charging feedback circuit 40 and the fast charging adjustment circuit 50.
Specifically, the power supply module 10 is configured to provide an input voltage signal. The power conversion circuit 20 is connected to the power supply module 10 and the wireless charging coil 30, and the power conversion circuit 20 is configured to receive the charging feedback signal and the input voltage signal, convert the input voltage signal into a charging current signal according to the charging feedback signal, and output the charging current signal to the wireless charging coil 30. The charging feedback circuit 40 is connected to the wireless charging coil 30 and the power conversion circuit 20, and the charging feedback circuit 40 is configured to sample an operating parameter of the wireless charging coil 30, generate a sampling signal, and generate a charging feedback signal according to the sampling signal and output the charging feedback signal to the power conversion circuit 20. The fast charge adjusting circuit 50 is connected to the charge feedback circuit 40, and the fast charge adjusting circuit 50 is configured to receive the sampling signal, generate a fast charge adjusting signal according to the sampling signal, and output the fast charge adjusting signal to the power supply module 10. The power supply module 10 is further configured to adjust a voltage of the input voltage signal according to the fast charge adjustment signal.
In this embodiment, the power supply module 10 may be a power supply interface or an energy storage device, and the power supply module 10 is mainly used for providing an input voltage signal. It will be appreciated that the voltage of the input voltage signal provided by the power module 10 is variable. Specifically, the power supply module 10 may adjust the voltage of the input voltage signal according to the fast charge adjustment signal, for example, the power supply module 10 may increase or decrease the voltage of the input voltage signal according to the fast charge adjustment signal, so that the current of the charging current signal generated by the power conversion circuit 20 according to the input voltage signal is different, so as to achieve the charging speed of the wireless charging coil 30 to the external device.
In this embodiment, the power conversion circuit 20 is configured to convert an input voltage signal into a charging current signal according to a charging feedback signal and output the charging current signal to the wireless charging coil 30. In this embodiment, when the power conversion circuit 20 receives only the input voltage signal, the power conversion circuit 20 will not operate, and will not output the charging current signal, and only when the power conversion circuit 20 receives the charging feedback signal, it indicates that there is an external device on the wireless charging coil 30 that needs to be charged wirelessly, and at this time, the power conversion circuit 20 converts the input voltage signal into the charging current signal according to the charging feedback signal and outputs the charging current signal to the wireless charging coil 30.
In this embodiment, the charging feedback circuit 40 is configured to sample an operating parameter of the wireless charging coil 30, generate a sampling signal, and generate a charging feedback signal according to the sampling signal and output the charging feedback signal to the power conversion circuit 20. Specifically, the charging feedback circuit 40 may sample the current or the voltage of the first end of the wireless charging coil 30, generate a sampling signal, and generate a charging feedback signal according to the sampling signal and output the charging feedback signal to the power conversion circuit 20. It can be understood that when a device to be charged approaches the wireless charging coil 30, that is, when a mobile phone (or a powered device) with wireless charging approaches or communicates with the wireless charging coil 30, a current or a voltage value at a first end of the wireless charging coil 30 will change, at this time, the charging feedback circuit 40 generates a charging feedback signal according to the sampling signal and outputs the charging feedback signal to the power conversion circuit 20, and the power conversion circuit 20 converts an input voltage signal into a charging current signal and outputs the charging current signal to the wireless charging coil 30, so as to charge an external device. In this embodiment, by setting the charging feedback circuit 40 to timely detect whether charging is needed in a hardware manner, the power conversion circuit 20 is timely controlled to output a charging current signal, so that stability of the wireless charging circuit is increased, and charging efficiency is improved.
In this embodiment, the wireless charging power of different external devices is different, and therefore the frequencies sent by the coils of the mobile phone with wireless charging are also different, the fast charging adjustment circuit 50 may generate a fast charging adjustment signal according to the sampling signal and output the fast charging adjustment signal to the power supply module 10, and the power supply module 10 adjusts the voltage of the input voltage signal according to the fast charging adjustment signal, for example, the power supply module 10 may increase or decrease the voltage of the input voltage signal according to the fast charging adjustment signal, so that the current of the charging current signal generated by the power conversion circuit 20 according to the input voltage signal is different, so as to achieve the speed of charging the external device by the wireless charging coil 30. In this embodiment, the efficiency of the wireless charging circuit can be improved by setting the fast charging adjustment circuit 50, so as to realize fast conversion of different wireless charging powers.
In one embodiment, referring to fig. 2, the wireless charging circuit further comprises: and is input to a filter circuit 60.
Specifically, the input filter circuit 60 is connected to the power conversion circuit 20 through the VIN interface, and the input filter circuit 60 is used for filtering the input voltage signal. In this embodiment, the input filter circuit 60 is used for filtering clutter signals in the input voltage signal, so as to improve the anti-interference capability of the input voltage signal and further improve the stability of the wireless charging circuit.
In one embodiment, referring to fig. 3, the charge feedback circuit 40 includes: a sampling unit 41 and a feedback unit 42.
Specifically, the sampling unit 41 is connected to the wireless charging coil 30, and the sampling unit 41 is configured to sample an operating parameter of the wireless charging coil 30, and generate a sampling signal. The feedback unit 42 is connected to the sampling unit 41 and the power conversion circuit 20, and the feedback unit 42 is configured to receive the sampling signal, perform voltage stabilizing filtering processing on the sampling signal, generate a charging feedback signal, and output the charging feedback signal to the power conversion circuit 20.
In this embodiment, when a device to be charged approaches the wireless charging coil 30, the current or voltage value of the first end of the wireless charging coil 30 will change, and at this time, the voltages of the sampling signals generated by the sampling unit 41 are different, and the feedback unit 42 performs voltage stabilizing filtering processing on the sampling signals to generate a charging feedback signal and output the charging feedback signal to the power conversion circuit 20. In this embodiment, by setting the sampling unit 41 and the feedback unit 42, whether an external device is close to the wireless charging coil 30 can be detected in time in a hardware manner, and the power conversion circuit 20 is controlled to output a charging current signal in time, so that the stability of the wireless charging circuit is improved, and the charging efficiency is improved.
In one embodiment, referring to fig. 4 and 5, the fast charge adjusting circuit 50 includes: a comparing unit 51 and an adjusting unit 52.
Specifically, the comparing unit 51 is connected to the charging feedback circuit 40, and the comparing unit 51 is configured to receive the sampling signal, compare the voltage of the sampling signal with a preset voltage, and generate a voltage comparison signal according to the comparison result. The adjusting unit 52 is connected to the comparing unit 51, and the adjusting unit 52 is configured to receive the voltage comparison signal and generate a fast charge adjusting signal according to the voltage comparison signal.
In this embodiment, the comparing unit 51 is configured to compare the voltage of the sampling signal with a preset voltage, and when the voltage of the sampling signal is greater than or equal to the preset voltage, it indicates that the external device needs to be charged with high power, for example, 15W, then generates a first voltage comparison signal, and after the adjusting unit 52 receives the first voltage comparison signal, generates a first fast charge adjusting signal, and the power supply module 10 increases the voltage of the input voltage signal according to the first fast charge adjusting signal. When the voltage of the sampling signal is less than the preset voltage, which indicates that the external device needs to be charged with low power, for example, 5W, a second voltage comparison signal is generated, the adjusting unit 52 generates a second fast charge adjusting signal after receiving the second voltage comparison signal, and the power supply module 10 reduces the voltage of the input voltage signal according to the second fast charge adjusting signal. Therefore, the wireless charging circuit can be quickly converted according to different wireless charging powers, and the efficiency of the wireless charging circuit is improved.
In one embodiment, referring to FIG. 2, the input filter circuit 60 includes: the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4 and the first resistor R1.
Specifically, the first end of the first capacitor C1 and the first end of the second capacitor C2, the first end of the first resistor R1 are commonly connected to the power supply module 10 through the VIN interface, the second end of the first capacitor C1 and the second end of the second capacitor C2 are grounded, the second end of the first resistor R1 and the first end of the third capacitor C3, and the first end of the fourth capacitor C4 are commonly connected to the input end of the power conversion circuit 20, and the second end of the third capacitor C3 and the second end of the fourth capacitor C4 and the ground end of the power conversion circuit 20 are grounded.
In this embodiment, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are filter capacitors, the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are used for performing filtering processing on the input voltage signal, the first resistor R1 is a current limiting resistor, and the first resistor R1 is used for performing filtering processing on the input voltage signal.
In one embodiment, referring to fig. 2, the power conversion circuit 20 includes: fifth capacitor C5, sixth capacitor C6, seventh capacitor C7, and power conversion chip U1.
Specifically, the input pin PVIN1 of the power conversion chip U1 is connected to the input filter circuit 60, the first bootstrap pin BST1 of the power conversion chip U1 is connected to the first output pin SW1 of the power conversion chip U1 after being connected in series to the fifth capacitor C5, the second bootstrap pin BST2 of the power conversion chip U1 is connected to the second output pin SW2 of the power conversion chip U1 after being connected in series to the sixth capacitor C6, the first output pin SW1 of the power conversion chip U1 is connected to the first end of the wireless charging coil 30, the second output pin SW2 of the power conversion chip U1 is connected to the second end of the wireless charging coil 30 after being connected in series to the seventh capacitor C7, and the ground end GND of the power conversion chip U1 is grounded. In the present embodiment, the fifth capacitor C5, the sixth capacitor C6, and the seventh capacitor C7 are used for performing filtering processing on the charging current signal, and the power conversion chip U1 is used for converting the input voltage signal into the charging current signal according to the charging feedback signal and outputting the charging current signal to the wireless charging coil 30.
In one embodiment application, power conversion circuit 20 is a wireless charging chip, which is available under the model number SC5001.
In one embodiment, referring to fig. 3, the sampling unit 41 includes: a first diode D1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, an eighth capacitor C8, and a ninth capacitor C9.
Specifically, the first end of the first diode D1 is connected to the first end of the wireless charging coil 30 through the VTANK, the second end of the first diode D1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is commonly connected to the feedback unit 42 with the first end of the third resistor R3, the first end of the eighth capacitor C8, and the first end of the fourth resistor R4, the second end of the third resistor R3 is grounded, the second end of the eighth capacitor C8 is grounded, the second end of the fourth resistor R4 is serially connected to the fifth resistor R5 and then grounded, and the first end of the ninth capacitor C9 is connected to the second end of the fourth resistor R4, and the second end of the ninth capacitor C9 is grounded. In this embodiment, due to the unidirectional conductivity of the first diode D1, the first diode D1 may function as a backflow prevention, wherein the second resistor R2 may perform a current limiting process on the sampling signal.
In one embodiment, referring to fig. 3, the feedback unit 42 includes: a sixth resistor R6, a tenth capacitor C10, and an eleventh capacitor C11.
Specifically, a first end of the sixth resistor R6 is connected to the sampling unit 41, a second end of the sixth resistor R6 is commonly connected to a first end of the tenth capacitor C10 and a first end of the eleventh capacitor C11, a second end of the tenth capacitor C10 is grounded, and the first end of the eleventh capacitor C11 is connected to the feedback pin VDM1 of the power conversion circuit 20 through VDM. In the present embodiment, the sixth resistor R6, the tenth capacitor C10, and the eleventh capacitor C11 are configured to perform voltage stabilizing filtering on the sampling signal, and generate a charging feedback signal for outputting to the power conversion circuit 20.
Referring to FIG. 4, in one embodiment, the comparison unit 51 employs a chip model number of CV90325A_TSS0820.
In one embodiment, referring to fig. 5, the adjusting unit 52 includes: seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, eleventh resistor R11, twelfth resistor R12, and twelfth capacitor C12.
Specifically, the first end of the seventh resistor R7, the first end of the eighth resistor R8, and the first end of the ninth resistor R9 are respectively connected to pins corresponding to the comparing unit 51 through signal lines EN1, EN2, and EN3, the second end of the seventh resistor R7, the second end of the eighth resistor R8, the second end of the ninth resistor R9, and the first end of the tenth resistor R10 are commonly connected to the power supply module 10 through the signal line USBD-, the second end of the tenth resistor R10, the second end of the eleventh resistor R11, and the second end of the twelfth capacitor C12 are grounded, the first end of the eleventh resistor R11 and the first end of the twelfth capacitor C12 are commonly connected to the second end of the twelfth resistor R12, and the first end of the twelfth resistor R12 is connected to the power supply module 10 through the signal line usbd+. In this embodiment, the second end of the twelfth resistor R12 is further connected to a 3.3V voltage, and the adjusting unit 52 can generate a fast charging adjustment signal according to the voltage comparison signal, so that the wireless charging circuit can perform fast conversion according to different wireless charging powers, thereby improving the efficiency of the wireless charging circuit.
The embodiment of the application also provides a docking station, which comprises a docking station body, and further comprises any wireless charging circuit, wherein the wireless charging circuit is arranged in the docking station body.
In the embodiment, the wireless charging circuit is integrated in the docking station, so that the docking station can also wirelessly charge the external equipment, and the functions of the docking station are further expanded. And in the wireless charging circuit, the accuracy of wireless charging is improved by arranging the charging feedback circuit 40, and the wireless charging power can be timely adjusted according to different power requirements by arranging the quick charging adjustment circuit 50, so that the application scene of wireless charging is further expanded. Through setting up the wireless docking station that charges of integration for the user can charge for the equipment that has wireless charging, need not to purchase the power adapter, very big convenience of customers.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. A wireless charging circuit, the wireless charging circuit comprising:
a wireless charging coil;
the power supply module is used for providing an input voltage signal;
the power conversion circuit is connected with the power supply module and the wireless charging coil, and is used for receiving a charging feedback signal and the input voltage signal, converting the input voltage signal into a charging current signal according to the charging feedback signal and outputting the charging current signal to the wireless charging coil;
the charging feedback circuit is connected with the wireless charging coil and the power conversion circuit, and is used for sampling working parameters of the wireless charging coil, generating sampling signals, generating the charging feedback signals according to the sampling signals and outputting the charging feedback signals to the power conversion circuit;
the fast charge adjusting circuit is connected with the charge feedback circuit and is used for receiving the sampling signal, generating a fast charge adjusting signal according to the sampling signal and outputting the fast charge adjusting signal to the power supply module;
the power supply module is further configured to adjust a voltage of the input voltage signal according to the fast charge adjustment signal.
2. The wireless charging circuit of claim 1, wherein the wireless charging circuit further comprises:
and the input filter circuit is connected with the power conversion circuit and is used for carrying out filter processing on the input voltage signal.
3. The wireless charging circuit of claim 1, wherein the charging feedback circuit comprises:
the sampling unit is connected with the wireless charging coil and is used for sampling the working parameters of the wireless charging coil and generating the sampling signal;
and the feedback unit is connected with the sampling unit and the power conversion circuit and is used for receiving the sampling signal, performing voltage stabilization filtering processing on the sampling signal, generating the charging feedback signal and outputting the charging feedback signal to the power conversion circuit.
4. A wireless charging circuit according to any of claims 1-3, wherein the fast charge adjustment circuit comprises:
the comparison unit is connected with the charging feedback circuit and is used for receiving the sampling signal, comparing the voltage of the sampling signal with a preset voltage and generating a voltage comparison signal according to a comparison result;
and the adjusting unit is connected with the comparing unit and is used for receiving the voltage comparison signal and generating the quick charge adjusting signal according to the voltage comparison signal.
5. The wireless charging circuit of claim 2, wherein the input filter circuit comprises: a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a first resistor; wherein,,
the first end of the first capacitor, the first end of the second capacitor and the first end of the first resistor are commonly connected to the power supply module, the second end of the first capacitor and the second end of the second capacitor are grounded, the second end of the first resistor, the first end of the third capacitor and the first end of the fourth capacitor are commonly connected to the input end of the power conversion circuit, and the second end of the third capacitor, the second end of the fourth capacitor and the grounding end of the power conversion circuit are grounded.
6. The wireless charging circuit of claim 2, wherein the power conversion circuit comprises: a fifth capacitor, a sixth capacitor, a seventh capacitor, and a power conversion chip; wherein,,
the input pin of the power conversion chip is connected with the input filter circuit, the first bootstrap pin of the power conversion chip is connected with the fifth capacitor in series and then is connected with the first output pin of the power conversion chip, the second bootstrap pin of the power conversion chip is connected with the sixth capacitor in series and then is connected with the second output pin of the power conversion chip, the first output pin of the power conversion chip is connected with the first end of the wireless charging coil, and the second output pin of the power conversion chip is connected with the seventh capacitor in series and then is connected with the second end of the wireless charging coil.
7. The wireless charging circuit of claim 3, wherein the sampling unit comprises: a first diode, a second resistor, a third resistor, a fourth resistor, a fifth resistor, an eighth capacitor and a ninth capacitor; wherein,,
the first end of the first diode is connected with the first end of the wireless charging coil, the second end of the first diode is connected with the first end of the second resistor, the second end of the second resistor is connected with the first end of the third resistor, the first end of the eighth capacitor and the first end of the fourth resistor in common with the feedback unit, the second end of the third resistor is grounded, the second end of the eighth capacitor is grounded, the second end of the fourth resistor is connected in series with the fifth resistor and then grounded, the first end of the ninth capacitor is connected with the second end of the fourth resistor, and the second end of the ninth capacitor is grounded.
8. A wireless charging circuit according to claim 3, wherein the feedback unit comprises: a sixth resistor, a tenth capacitor, and an eleventh capacitor; wherein,,
the first end of the sixth resistor is connected with the sampling unit, the second end of the sixth resistor is commonly connected with the first end of the tenth capacitor and the first end of the eleventh capacitor, the second end of the tenth capacitor is grounded, and the first end of the eleventh capacitor is connected with the power conversion circuit.
9. The wireless charging circuit of claim 4, wherein the adjustment unit comprises: seventh resistor, eighth resistor, ninth resistor, tenth resistor, eleventh resistor, twelfth resistor, and twelfth capacitor; wherein,,
the first end of the seventh resistor, the first end of the eighth resistor and the first end of the ninth resistor are all connected with the comparison unit, the second end of the seventh resistor, the second end of the eighth resistor, the second end of the ninth resistor and the first end of the tenth resistor are commonly connected with the power supply module, the second end of the tenth resistor, the second end of the eleventh resistor and the second end of the twelfth capacitor are all grounded, the first end of the eleventh resistor and the first end of the twelfth capacitor are commonly connected with the second end of the twelfth resistor, and the first end of the twelfth resistor is connected with the power supply module.
10. A docking station comprising a docking station body, and further comprising the wireless charging circuit of any one of claims 1 to 9, the wireless charging circuit being disposed within the docking station body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223503630.XU CN219164271U (en) | 2022-12-27 | 2022-12-27 | Wireless charging circuit and docking station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223503630.XU CN219164271U (en) | 2022-12-27 | 2022-12-27 | Wireless charging circuit and docking station |
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| CN219164271U true CN219164271U (en) | 2023-06-09 |
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