Solar charging converter

Abstract

The utility model provides a solar charging converter. The solar charging converter comprises an input interface, a DC-DC conversion circuit, a PD protocol charging circuit, a wireless charging circuit, a type-c interface and a wireless transmitting terminal, the input end of the input interface is used for being electrically connected with a solar cell panel, the output end of the input interface is electrically connected to the input end of the DC-DC conversion circuit, the output end of the DC-DC conversion circuit is electrically connected to the input ends of the PD protocol charging circuit and the wireless charging circuit, the output end of the PD protocol charging circuit is electrically connected to the type-c interface, and the output end of the wireless charging circuit is electrically connected to the type-c interface. The output end of the wireless charging circuit is electrically connected to a wireless transmitting end, and the wireless transmitting end is used for being electrically connected to a wireless receiving end of electronic equipment; the type-c interface is used for being electrically connected with electronic equipment. The solar charger provided by the utility model can carry out wireless charging and wired charging on different electronic devices, supports rapid charging of multiple types of electronic devices, and improves the charging efficiency and charging power of the solar charging converter.

Description

Technical Field

[0001] This utility model belongs to the field of solar charging technology, and in particular relates to a solar charging converter. Background Technology

[0002] A solar-powered charger is an environmentally friendly charging device that uses solar energy to quickly charge electrical devices by connecting to a solar panel. With the development of new energy technologies, solar panels are increasingly used in consumer electronics. As technology advances, the number of consumer electronics products such as mobile phones, tablets, and laptops is also increasing, leading to a wider application of chargers. However, traditional solar-powered chargers require output cables or ports to charge electronic devices, and their charging efficiency is low, charging time is long, and this negatively impacts the user's charging experience. Utility Model Content

[0003] The technical objective of this invention is to provide a solar charging converter that aims to solve at least one of the problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model is implemented as follows: a solar charging converter, including an input interface, a DC-DC conversion circuit, a PD protocol charging circuit, a wireless charging circuit, a Type-C interface, and a wireless transmitter.

[0005] The input terminal of the input interface is used to electrically connect to the solar panel. The output terminal of the input interface is electrically connected to the input terminal of the DC-DC conversion circuit. The output terminal of the DC-DC conversion circuit is electrically connected to the input terminals of the PD protocol charging circuit and the wireless charging circuit. The output terminal of the PD protocol charging circuit is electrically connected to the Type-C interface. The output terminal of the wireless charging circuit is electrically connected to the wireless transmitter. The wireless transmitter is used to electrically connect to the wireless receiver of the electronic device. The Type-C interface is used to electrically connect to the electronic device.

[0006] Furthermore, the wireless charging circuit includes a wireless charging transmitter control chip, a wireless transmitter drive circuit, and a wireless coil; the wireless charging transmitter control chip is used to electrically connect to the solar panel, the output terminal of the wireless charging transmitter control chip is electrically connected to the input terminal of the wireless transmitter drive circuit, the output terminal of the wireless transmitter drive circuit is electrically connected to the wireless coil, and the wireless coil forms the wireless transmitter.

[0007] Furthermore, the wireless transmission drive circuit includes a resonant capacitor circuit, a first wireless charging transmitter chip, a second wireless charging transmitter chip, and a filter circuit;

[0008] The input terminal of the resonant capacitor circuit is electrically connected to the output terminals of the first wireless charging transmitter chip and the second wireless charging transmitter chip, and the output terminal of the resonant capacitor circuit is electrically connected to the input terminal of the wireless coil; the input terminals of the first wireless charging transmitter chip and the second wireless charging transmitter chip are used to electrically connect to the solar panel, and the first wireless charging transmitter chip is also electrically connected to the wireless charging transmitter control chip; the filter circuit is electrically connected between the wireless charging transmitter control chip and the resonant capacitor circuit.

[0009] Furthermore, the filter circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, and an analog ground port;

[0010] The first pin, the first resistor, the first capacitor, and the analog ground port of the wireless charging transmitter control chip are connected in series; the first pin, the first resistor, the second resistor, and the analog ground port of the wireless charging transmitter control chip are connected in series; the first pin, the first resistor, the fourth resistor, the fifth resistor, and the analog ground port of the wireless charging transmitter control chip are connected in series; the first pin, the first resistor, the fourth resistor, the second capacitor, the third capacitor, and the analog ground port of the wireless charging transmitter control chip are connected in series.

[0011] The second pin of the wireless charging transmitter control chip, the third resistor, the fifth resistor, and the analog ground port are connected in series; the second capacitor and the third capacitor are also electrically connected to the resonant capacitor circuit.

[0012] Furthermore, the solar charging converter also includes a temperature detection circuit, which is electrically connected to the wireless charging circuit.

[0013] Furthermore, the temperature detection circuit includes a fourth capacitor, a sixth resistor, and a thermistor;

[0014] The first terminal of the fourth capacitor is electrically connected to the NTC pin of the wireless charging transmitter control chip, and the second terminal of the fourth capacitor is grounded; the first terminal of the sixth resistor is electrically connected to the NTC pin of the wireless charging transmitter control chip and the first terminal of the thermistor, and the second terminal of the sixth resistor is grounded; the second terminal of the thermistor is electrically connected to the power supply pin of the wireless charging transmitter control chip.

[0015] Furthermore, the solar charging converter also includes an input voltage detection circuit, which is electrically connected to the wireless charging transmitter control chip and is also used to electrically connect to the solar panel.

[0016] Furthermore, the input voltage detection circuit includes a fifth capacitor, a seventh resistor, and an eighth resistor;

[0017] The first terminal of the fifth capacitor is electrically connected to the voltage detection pin of the wireless charging transmitter control chip, and the second terminal of the fifth capacitor is grounded; the first terminal of the seventh resistor is electrically connected to the voltage detection pin of the wireless charging transmitter control chip and the first terminal of the eighth resistor, and the second terminal of the seventh resistor is grounded; the second terminal of the eighth resistor is used to electrically connect to the solar panel.

[0018] Furthermore, the PD protocol charging circuit includes a PD protocol chip, a synchronous voltage regulator chip, and a power switch. The output terminal of the DC-DC conversion circuit and the output terminal of the PD protocol chip are electrically connected to the input terminal of the synchronous voltage regulator chip. The output terminal of the synchronous voltage regulator chip and the output terminal of the PD protocol chip are electrically connected to the input terminal of the power switch. The input terminal of the PD protocol chip is electrically connected to the output terminal of the Type-C interface, and the output terminal of the power switch is electrically connected to the input terminal of the Type-C interface.

[0019] Furthermore, the PD protocol chip is model IP2726, and the synchronous voltage regulation power supply chip is model MP9928.

[0020] Compared with existing technologies, the solar charger converter of this invention has the following advantages: It features a PD protocol charging circuit, a Type-C interface, a wireless charging circuit, and a wireless transmitter, making the wireless and wired charging ends of the solar charger compatible. This allows the solar charger to wirelessly and wiredly charge different electronic devices. Furthermore, because the Type-C interface of the solar charger converter supports the PD charging protocol, it can support fast charging of multiple electronic devices, improving the charging efficiency and power of the solar charger converter. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of the solar charging converter in an embodiment of the present invention.

[0022] Figure 2 This is a circuit diagram of the solar charging converter in an embodiment of this utility model;

[0023] Figure 3 This is a partial circuit diagram of the solar charging converter in an embodiment of this utility model;

[0024] Figure 4 This is a circuit diagram of the temperature detection circuit and the input voltage detection circuit in an embodiment of this utility model;

[0025] Figure 5 This is a partial circuit diagram of the solar charging converter in an embodiment of this utility model;

[0026] Figure 6 This is a circuit diagram of the synchronous voltage regulation power supply chip in an embodiment of this utility model;

[0027] Figure 7 This is a partial circuit diagram of the PD protocol charging circuit in an embodiment of this utility model;

[0028] Figure 8 This is a schematic diagram of the overall structure of the solar charging converter according to an embodiment of the present invention.

[0029] In the accompanying drawings, the reference numerals indicate:

[0030] 1. Solar charging converter; 2. Solar panel; 10. DC-DC conversion circuit; 20. PD protocol charging circuit; 21. PD protocol chip; 22. Synchronous voltage regulation power supply chip; 23. Power switching transistor; 30. Type-C interface; 31. Type-C input interface; 32. Type-C output interface; 40. Wireless charging circuit; 41. Wireless charging transmitter control chip; 42. Wireless transmitter drive circuit; 421. First wireless charging transmitter chip; 422. Second wireless charging transmitter chip; 423. Filtering circuit; 424. Resonant capacitor circuit; 43. Wireless coil; 50. Temperature detection circuit; 60. Input voltage detection circuit; 70. Connecting wire; 80. Housing. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] Example:

[0035] Please see Figures 1 to 8 In this embodiment, the solar charging converter 1 includes an input interface, a DC-DC conversion circuit 10, a PD protocol charging circuit 20, a wireless charging circuit 40, a type-C interface 30, and a wireless transmitter.

[0036] The input terminal of the input interface is used to electrically connect to the solar panel 2. The output terminal of the input interface is electrically connected to the input terminal of the DC-DC conversion circuit 10. The output terminal of the DC-DC conversion circuit 10 is electrically connected to the input terminals of the PD protocol charging circuit 20 and the wireless charging circuit 40. The output terminal of the PD protocol charging circuit 20 is electrically connected to the type-c interface 30. The output terminal of the wireless charging circuit 40 is electrically connected to the wireless transmitter. The wireless transmitter is used to electrically connect to the wireless receiver of the electronic device. The type-c interface 30 is used to electrically connect to the electronic device.

[0037] In this embodiment, the solar charger converter 1 includes a PD protocol charging circuit 20, a Type-C interface 30, a wireless charging circuit 40, and a wireless transmitter, enabling compatibility between the wireless and wired charging ends of the solar charger. This allows the solar charger to wirelessly and wiredly charge different electronic devices. Furthermore, because the Type-C interface 30 of the solar charger converter 1 supports the PD charging protocol, the solar charger converter 1 can support fast charging of multiple electronic devices, improving its charging efficiency and power.

[0038] Furthermore, such as Figure 2 and 3 As shown, the wireless charging circuit 40 includes a wireless charging transmitter control chip 41, a wireless transmitter drive circuit 42, and a wireless coil 43. The wireless charging transmitter control chip 41 is electrically connected to the solar panel 2. The output terminal of the wireless charging transmitter control chip 41 is electrically connected to the input terminal of the wireless transmitter drive circuit 42. The output terminal of the wireless transmitter drive circuit 42 is electrically connected to the wireless coil 43, and the wireless coil 43 forms a wireless transmitter.

[0039] Specifically, such as Figure 5 and 7 As shown, the Type-C interface 30 includes a Type-C output interface 32 and a Type-C input interface 31. The Type-C input interface 31 is also used for electrical connection to the solar panel 2, and it can supply power to the wireless charging circuit 40. The wireless coil 43 generates a magnetic field when excited by the alternating current generated by the wireless transmitting drive circuit 42. The receiving coil in the electronic device to be charged senses the magnetic field and converts the energy carried by the magnetic field into electrical energy, thus enabling the electronic device to be wirelessly charged.

[0040] Furthermore, such as Figure 3 As shown, the wireless transmission drive circuit 42 includes a resonant capacitor circuit 424, a first wireless charging transmitter chip 421, a second wireless charging transmitter chip 422, and a filter circuit 423.

[0041] The input terminal of the resonant capacitor circuit 424 is electrically connected to the output terminals of the first wireless charging transmitter chip 421 and the second wireless charging transmitter chip 422, and the output terminal of the resonant capacitor circuit 424 is electrically connected to the input terminal of the wireless coil 43; the input terminals of the first wireless charging transmitter chip 421 and the second wireless charging transmitter chip 422 are used to electrically connect to the solar panel 2, and the first wireless charging transmitter chip 421 is also electrically connected to the wireless charging transmitter control chip 41; the filter circuit 423 is electrically connected between the wireless charging transmitter control chip 41 and the resonant capacitor circuit 424.

[0042] Specifically, the resonant capacitor circuit 424 is a combination of CBB capacitors (404 / 100V / CBB). The filter circuit 423 provides electrical isolation between the pins of the wireless charging transmitter control chip 41 and the power network of the wireless transmitter drive resistor, reducing the influence of electromagnetic interference, ensuring the normal operation of the wireless charging transmitter control chip 41, and improving the stability of the wireless charging transmitter control chip 41.

[0043] The first wireless charging transmitter chip 421 and the second wireless charging transmitter chip 422 are both model R4608A. The wireless charging transmitter control chip 41 is model R9301.

[0044] As shown in the figure, the first wireless charging transmitter chip 421 is electrically connected to the ISEN pin of the wireless charging transmitter control chip 41. One end of resistor R2 is electrically connected to the ISEN pin, and the other end of resistor R2 is electrically connected to the first wireless charging transmitter chip 421. Resistor R2 is used as a single-point ground. Single-point grounding connects all grounds to the same grounding point, which can avoid ground loops and ground wire return current. Resistor R2 can also be shorted through traces to reduce the resistance of the signal path and circuit noise interference.

[0045] Capacitor C17 is connected in series with the ISEN pin and the analog ground interface AGND. The capacitor is placed close to the pin of the wireless charging transmitter control chip 41, which can stabilize the voltage, absorb noise, and reduce the impact of electromagnetic interference.

[0046] Furthermore, such as Figure 3 As shown, the filter circuit 423 includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, and an analog ground port;

[0047] The first pin, first resistor, first capacitor, and analog ground port of the wireless charging transmitter control chip 41 are connected in series; the first pin, first resistor, second resistor, and analog ground port of the wireless charging transmitter control chip 41 are connected in series; the first pin, first resistor, fourth resistor, fifth resistor, and analog ground port of the wireless charging transmitter control chip 41 are connected in series; the first pin, first resistor, fourth resistor, second capacitor, third capacitor, and analog ground port of the wireless charging transmitter control chip 41 are connected in series.

[0048] The second pin, third resistor, fifth resistor and analog ground port of the wireless charging transmitter control chip 41 are connected in series; the second capacitor and the third capacitor are also electrically connected to the resonant capacitor circuit 424.

[0049] The filter circuit 423 consists of multiple capacitors and resistors, capable of absorbing noise, stabilizing voltage, and reducing the effects of electromagnetic interference. Specifically, such as... Figure 3 As shown, in this embodiment, the first resistor is R11, the second resistor is R12, the third resistor is R13, the fourth resistor is R14, and the fifth resistor is R15; the first capacitor is C18, the second capacitor is C19, and the third capacitor is C20. The filter circuit 423 is also electrically connected to the clock pin CK and the pin VCOIL of the wireless charging transmitter control chip 41.

[0050] The filter circuit 423 is located near the pin of the wireless charging transmitter control chip 41 to ensure that interference from the power network can be effectively filtered out, while maintaining the integrity of the analog ground port AGND, and ensuring the normal operation and performance stability of the wireless charging transmitter control chip 41.

[0051] Furthermore, such as Figure 4 As shown, the solar charging converter 1 also includes a temperature detection circuit 50, which is electrically connected to the wireless charging circuit 40.

[0052] Furthermore, such as Figure 4 As shown, the temperature detection circuit 50 includes a fourth capacitor, a sixth resistor, and a thermistor.

[0053] The first end of the fourth capacitor is electrically connected to the NTC pin of the wireless charging transmitter control chip 41, and the second end of the fourth capacitor is grounded; the first end of the sixth resistor is electrically connected to the NTC pin of the wireless charging transmitter control chip 41 and the first end of the thermistor, and the second end of the sixth resistor is grounded; the second end of the thermistor is electrically connected to the power supply pin of the wireless charging transmitter control chip 41.

[0054] Specifically, the fourth capacitor is capacitor C22, the sixth resistor is capacitor R21, and the thermistor is NTC1. The NTC pin of the wireless charging transmitter control chip 41 is electrically connected to the temperature detection circuit 50, which includes capacitor C22, resistor R21, and thermistor NTC1. The first end of capacitor C22 is electrically connected to the NTC pin, and the second end of capacitor C22 is electrically connected to the analog ground port AGND. The first end of resistor R21 is electrically connected to the NTC pin and the first end of the thermistor NTC1, and the second end of resistor R21 is electrically connected to the analog ground port AGND. The second end of the thermistor NTC1 is electrically connected to the VCC pin of the wireless charging transmitter control chip 41. The temperature detection circuit 50 provides thermal protection for the solar charger converter 1. Based on the characteristics of thermistor NTC1, the resistance value of thermistor NTC1 changes with temperature. Through the cooperation of capacitor C22 and resistor R21, the temperature detection circuit 50 can achieve high-precision and sensitive detection of temperature difference.

[0055] Specifically, the NTC1 thermistor has parameters of 10K 1%_3950, high accuracy, good stability, fast response speed, and can sensitively detect temperature changes.

[0056] Furthermore, such as Figure 4 As shown, the solar charging converter 1 also includes an input voltage detection circuit 60, which is electrically connected to the wireless charging transmitter control chip 41 and is also used to electrically connect to the solar panel 2.

[0057] Furthermore, the input voltage detection circuit 60 includes a fifth capacitor, a seventh resistor, and an eighth resistor;

[0058] The first end of the fifth capacitor is electrically connected to the voltage detection pin of the wireless charging transmitter control chip 41, and the second end of the fifth capacitor is grounded; the first end of the seventh resistor is electrically connected to the voltage detection pin of the wireless charging transmitter control chip 41 and the first end of the eighth resistor, and the second end of the seventh resistor is grounded; the second end of the eighth resistor is used to electrically connect to the solar panel 2.

[0059] Specifically, the fifth capacitor is capacitor C23, the seventh resistor is resistor R22, and the eighth resistor is resistor R19. The input voltage detection circuit 60 includes capacitor C23, resistor R22, and resistor R19. The first terminal of capacitor C23 is electrically connected to the voltage detection pin DET_V of the wireless charging transmitter control chip 41, and the second terminal of capacitor C23 is electrically connected to the analog ground port AGND. The first terminal of resistor R22 is electrically connected to the voltage detection pin DET_V of the wireless charging transmitter control chip 41 and the first terminal of resistor R19. The second terminal of resistor R22 is electrically connected to the ground port AGND, and the second terminal of resistor R19 is electrically connected to the power supply pin VIN+.

[0060] Specifically, VIN+ is the positive terminal of the DC power output, the DET_V pin of the wireless charging transmitter control chip 41 is the voltage detection pin, capacitor C23 acts as a filter to ensure that the DET_V pin of the wireless charging transmitter control chip 41 stably detects the voltage, and resistors R22 and R19 act as a voltage divider. Compared with the traditional solar charging converter 1, the solar charging converter 1 in this embodiment can detect the input voltage, ensuring that the wireless charging end of the solar charging converter 1 is in a stable power supply state, optimizing charging efficiency, and improving the safety, stability, and charging efficiency of the solar charging converter 1.

[0061] Furthermore, such as Figure 6 and 7 As shown, the PD protocol charging circuit 20 includes a PD protocol chip 21, a synchronous voltage regulating power supply chip 22, and a power switch 23. The output terminal of the DC-DC conversion circuit 10 and the output terminal of the PD protocol chip 21 are electrically connected to the input terminal of the synchronous voltage regulating power supply chip 22. The output terminal of the synchronous voltage regulating power supply chip 22 and the output terminal of the PD protocol chip 21 are electrically connected to the input terminal of the power switch 23. The input terminal of the PD protocol chip 21 is electrically connected to the output terminal of the type-c interface 30, and the output terminal of the power switch 23 is electrically connected to the input terminal of the type-c interface 30.

[0062] In this embodiment, the Type-C interface 30 feeds back the operating voltage to the PD protocol chip 21. The PD protocol chip 21 adjusts the output voltage of the synchronous voltage regulator chip 22 according to the feedback operating voltage and outputs it to the Type-C interface 30 through the power switch 23. After the electronic device to be charged is inserted into the Type-C interface 30, the PD protocol chip 21 shakes hands with the Type-C interface 30 through the CC1, DM1, DP1, and CC2 pins, then identifies the operating voltage of the electronic device to be charged, and then communicates with the DC-DC conversion circuit 10 through the PD_FB pin to send a voltage regulation signal. The DC-DC conversion circuit 10 synchronously adjusts the voltage at the PD-OUT-VCC output terminal according to the voltage regulation signal, and outputs it to the PD_VBUS pin of the Type-C interface 30 after passing through the power switch 23Q5.

[0063] Furthermore, such as Figure 6 and 7 As shown, the PD protocol chip 21 is model IP2726, and the synchronous voltage regulating power supply chip 22 is model MP9928.

[0064] The MP9928's input pin IN is connected to the electrical energy input from the solar panel 2. The MP9928 chip (U2) has functions such as output overvoltage protection, output overcurrent protection, and overtemperature shutdown protection.

[0065] Furthermore, such as Figure 8 As shown, the solar charge converter 1 also includes a housing 80 and a connecting wire 70 for electrically connecting the solar panel 2.

[0066] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solar charging converter, characterized in that, It includes an input interface, a DC-DC conversion circuit, a PD protocol charging circuit, a wireless charging circuit, a Type-C interface, and a wireless transmitter; The input terminal of the input interface is used to electrically connect to the solar panel. The output terminal of the input interface is electrically connected to the input terminal of the DC-DC conversion circuit. The output terminal of the DC-DC conversion circuit is electrically connected to the input terminals of the PD protocol charging circuit and the wireless charging circuit. The output terminal of the PD protocol charging circuit is electrically connected to the Type-C interface. The output terminal of the wireless charging circuit is electrically connected to the wireless transmitter. The wireless transmitter is used to electrically connect to the wireless receiver of the electronic device. The Type-C interface is used to electrically connect to the electronic device.

2. The solar charging converter according to claim 1, characterized in that, The wireless charging circuit includes a wireless charging transmitter control chip, a wireless transmitter drive circuit, and a wireless coil; the wireless charging transmitter control chip is used to electrically connect to the solar panel, the output terminal of the wireless charging transmitter control chip is electrically connected to the input terminal of the wireless transmitter drive circuit, the output terminal of the wireless transmitter drive circuit is electrically connected to the wireless coil, and the wireless coil forms the wireless transmitter.

3. The solar charging converter according to claim 2, characterized in that, The wireless transmission drive circuit includes a resonant capacitor circuit, a first wireless charging transmitter chip, a second wireless charging transmitter chip, and a filter circuit. The input terminal of the resonant capacitor circuit is electrically connected to the output terminals of the first wireless charging transmitter chip and the second wireless charging transmitter chip, and the output terminal of the resonant capacitor circuit is electrically connected to the input terminal of the wireless coil; the input terminals of the first wireless charging transmitter chip and the second wireless charging transmitter chip are used to electrically connect to the solar panel, and the first wireless charging transmitter chip is also electrically connected to the wireless charging transmitter control chip; the filter circuit is electrically connected between the wireless charging transmitter control chip and the resonant capacitor circuit.

4. The solar charging converter according to claim 3, characterized in that, The filter circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, and an analog ground port; The first pin, the first resistor, the first capacitor, and the analog ground port of the wireless charging transmitter control chip are connected in series; the first pin, the first resistor, the second resistor, and the analog ground port of the wireless charging transmitter control chip are connected in series; the first pin, the first resistor, the fourth resistor, the fifth resistor, and the analog ground port of the wireless charging transmitter control chip are connected in series; the first pin, the first resistor, the fourth resistor, the second capacitor, the third capacitor, and the analog ground port of the wireless charging transmitter control chip are connected in series. The second pin of the wireless charging transmitter control chip, the third resistor, the fifth resistor, and the analog ground port are connected in series; the second capacitor and the third capacitor are also electrically connected to the resonant capacitor circuit.

5. The solar charging converter according to claim 2, characterized in that, The solar charging converter also includes a temperature detection circuit, which is electrically connected to the wireless charging circuit.

6. The solar charging converter according to claim 5, characterized in that, The temperature detection circuit includes a fourth capacitor, a sixth resistor, and a thermistor; The first terminal of the fourth capacitor is electrically connected to the NTC pin of the wireless charging transmitter control chip, and the second terminal of the fourth capacitor is grounded; the first terminal of the sixth resistor is electrically connected to the NTC pin of the wireless charging transmitter control chip and the first terminal of the thermistor, and the second terminal of the sixth resistor is grounded; the second terminal of the thermistor is electrically connected to the power supply pin of the wireless charging transmitter control chip.

7. The solar charging converter according to claim 2, characterized in that, The solar charging converter also includes an input voltage detection circuit, which is electrically connected to the wireless charging transmitter control chip and is also used to electrically connect to the solar panel.

8. The solar charging converter according to claim 7, characterized in that, The input voltage detection circuit includes a fifth capacitor, a seventh resistor, and an eighth resistor; The first terminal of the fifth capacitor is electrically connected to the voltage detection pin of the wireless charging transmitter control chip, and the second terminal of the fifth capacitor is grounded; the first terminal of the seventh resistor is electrically connected to the voltage detection pin of the wireless charging transmitter control chip and the first terminal of the eighth resistor, and the second terminal of the seventh resistor is grounded; the second terminal of the eighth resistor is used to electrically connect to the solar panel.

9. The solar charging converter according to claim 1, characterized in that, The PD protocol charging circuit includes a PD protocol chip, a synchronous voltage regulating power supply chip, and a power switching transistor. The output terminal of the DC-DC conversion circuit and the output terminal of the PD protocol chip are electrically connected to the input terminal of the synchronous voltage regulating power supply chip. The output terminal of the synchronous voltage regulating power supply chip and the output terminal of the PD protocol chip are electrically connected to the input terminal of the power switching transistor. The input terminal of the PD protocol chip is electrically connected to the output terminal of the Type-C interface, and the output terminal of the power switching transistor is electrically connected to the input terminal of the Type-C interface.

10. The solar charging converter according to claim 9, characterized in that, The PD protocol chip is model IP2726, and the synchronous voltage regulation power supply chip is model MP9928.

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