Ultra-thin 10W wireless charging charger

Abstract

The utility model discloses an ultra-thin 10W wireless charging charger. An internal circuit of the ultra-thin 10W wireless charging charger comprises an input rectification circuit, a master control IC circuit, a current detection circuit, a voltage sampling circuit, a voltage demodulation and FOD foreign matter detection circuit, a transmitting coil output circuit and an indication breathing lamp circuit. The ultra-thin 10W wireless charging charger is high in charging efficiency, and multiple safety protection mechanisms including no-load and on-load foreign matter detection, NTC temperature detection, input overvoltage, undervoltage and overcurrent protection and the like are designed; the internal structure of the charger is easy to optimize due to pin arrangement of the main control chip, so that the internal structure of the whole charger is compact, an ultra-thin body can be achieved, the suspended height of a charged electric appliance is small, the charged electric appliance is easy to place stably, and the whole charger is more convenient to carry.

Description

Technical Field

[0001] This utility model belongs to the field of power charger technology, specifically relating to an ultra-thin 10W wireless charging charger. Background Technology

[0002] Wireless charging chargers offer advantages such as ease of use and improved interface durability. However, existing wireless charging chargers suffer from low charging efficiency and inadequate internal safety protection mechanisms. Furthermore, the less compact internal circuitry results in a bulky and thick charger. Since most wireless chargers are designed to lay flat, the device being charged is suspended high in the air, leading to instability and making the charger inconvenient to carry. Utility Model Content

[0003] The purpose of this invention is to address the above-mentioned problems by providing an ultra-thin 10W wireless charging charger. This charger has multiple safety protection mechanisms, while also achieving an ultra-thin design. The device being charged is suspended at a low height, making it easy to place stably, and the entire charger is more portable.

[0004] This utility model is achieved through the following technical solution:

[0005] A thin 10W wireless charger is characterized in that its internal circuitry includes an input rectifier circuit, a main control IC circuit, a current detection circuit, a voltage sampling circuit, a voltage demodulation and FOD foreign object detection circuit, a transmitting coil output circuit, and an indicator breathing light circuit.

[0006] The input rectifier circuit includes capacitors C17 and C18 connected between the input terminals VBUS and PGND, and capacitor C15 connected between the input terminals VBUS and GND.

[0007] The main control IC circuit includes chip U1, which is model IP6801. The second pin of chip U1 is connected to the input terminal VBUS. Chip U1 outputs four drive signals from pin 10 to pin 13 respectively.

[0008] The output circuit of the transmitting coil includes MOSFETs Q11, Q12, Q21, and Q22 forming an H-bridge connected between the input terminals VBUS and PGND. The drains of MOSFETs Q11 and Q12 are connected, and the drains of MOSFETs Q21 and Q22 are connected. The sources of MOSFETs Q12 and Q22 are both connected to the input terminal VBUS, and the sources of MOSFETs Q11 and Q21 are both connected to PGND. A capacitor C1 and an inductor L1 forming an LC resonant circuit are connected between the drains of MOSFETs Q11 and Q21. A series circuit consisting of resistor R4 and capacitor C9 is connected between the drain and source of S-channel transistor Q11; a series circuit consisting of resistor R5 and capacitor C10 is connected between the drain and source of MOSFET Q21; a parallel circuit consisting of diode D4 and resistor R12 is connected between the gate and source of MOSFET Q12; and a parallel circuit consisting of diode D5 and resistor R13 is connected between the gate and source of MOSFET Q22. MOSFETs Q11, Q12, Q21, and Q22 are driven by four drive signals provided by chip U1.

[0009] The current detection circuit includes a resistor R10 and a capacitor C13. The resistor R10 and the capacitor C13 are connected in series between PGND and GND. One end of the capacitor C13 is connected to GND, and the other end is connected to the current sampling input pin (pin sixteen) of the chip U1.

[0010] The voltage sampling circuit includes resistors R3 and R6. Resistors R3 and R6 are connected in series between the input terminals VBUS and GND. The common terminal of resistors R3 and R6 is connected to the voltage sampling input pin (pin 5) of the chip U1.

[0011] The voltage demodulation and FOD foreign object detection circuit includes diode D1, resistors R1 and R2, and capacitors C2 and C4. The positive terminal of diode D1 is connected to the common terminal of capacitor C1 and inductor L1, and the negative terminal is connected in series with resistors R1 and R2 and then connected to GND. The two ends of resistor R2 are connected to capacitor C4. The common terminal of resistors R1 and R2 is connected to the ASK demodulation input pin (sixth pin) of chip U1 through capacitor C2.

[0012] The indicator breathing light circuit includes LEDs D2 and D3, resistors R7, R8, and R9, and a thermistor RT1. The positive terminal of LED D2 is connected to the indicator light pin (third pin) of chip U1 through resistor R8, and the negative terminal is connected to GND. The positive terminal of LED D3 is connected to the indicator light and NTC detection pin (fourth pin) of chip U1 through resistor R9, and the negative terminal is connected to GND. One end of the thermistor RT1 is connected to GND, and the other end is connected to the indicator light and NTC detection pin (fourth pin) of chip U1 through resistor R7.

[0013] Furthermore, capacitors C3, C5, and C7 are connected in parallel across capacitor C1. Capacitor C1, along with capacitors C3, C5, and C7, forms a parallel circuit, which is then connected in series with inductor L1.

[0014] Furthermore, the MOSFETs Q11, Q12, Q21, and Q22 are model AP10G02LI.

[0015] Furthermore, the diodes D4 and D5 are model number 1N4148WS.

[0016] Furthermore, the resistance of the thermistor RT1 is 10K.

[0017] The beneficial effects of this utility model are: 1. The wireless charger of this utility model adopts the main control chip of model IP6801, which has high charging efficiency and realizes multiple safety protection mechanisms, including no-load and loaded foreign object detection, NTC temperature detection, and input overvoltage, undervoltage, and overcurrent protection; 2. The pin arrangement of the main control chip makes it easy to optimize the internal structure of the charger, making the internal structure of the entire charger compact and achieving an ultra-thin shape; the suspended height of the charged electrical appliance is small, making it easy to place stably, and the entire charger is more portable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the principle of this utility model.

[0019] Figure 2 This is the circuit schematic diagram of this utility model.

[0020] In the diagram, 1 is the input rectifier circuit, 2 is the main control IC circuit, 3 is the current detection circuit, 4 is the voltage sampling circuit, 5 is the voltage demodulation and FOD foreign object detection circuit, 6 is the transmitting coil output circuit, and 7 is the indicator breathing light circuit. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific examples and accompanying drawings.

[0022] like Figure 1 , Figure 2 As shown, an ultra-thin 10W wireless charger has an internal circuit including an input rectifier circuit 1, a main control IC circuit 2, a current detection circuit 3, a voltage sampling circuit 4, a voltage demodulation and FOD foreign object detection circuit 5, a transmitting coil output circuit 6, and an indicator breathing light circuit 7.

[0023] The input rectifier circuit 1 includes capacitors C17 and C18 connected between the input terminals VBUS and PGND, and capacitor C15 connected between the input terminals VBUS and GND.

[0024] The main control IC circuit 2 includes a chip U1, which is model IP6801. The second pin of the chip U1 is connected to the input terminal VBUS. The chip U1 outputs four drive signals DRV1H, DRV1L, DRV2H and DRV2L from the tenth to the thirteenth pins, respectively.

[0025] The output circuit 6 of the transmitting coil includes MOS transistors Q11, Q12, Q21 and Q22 connected between the input terminals VBUS and PGND to form an H-bridge. The MOS transistors Q11, Q12, Q21 and Q22 are of model AP10G02LI. The drains of MOSFETs Q11 and Q12 are connected, the drains of MOSFETs Q21 and Q22 are connected, the sources of MOSFETs Q12 and Q22 are both connected to the input terminal VBUS, and the sources of MOSFETs Q11 and Q21 are both connected to PGND. Capacitors C1, C3, C5, and C7, and inductor L1, forming an LC resonant circuit, are connected between the drains of MOSFETs Q11 and Q21. Capacitors C1, C3, C5, and C7 form a parallel circuit and are then connected in series with inductor L1. A series circuit consisting of resistor R4 and capacitor C9 is connected between the drain and source of MOSFET Q11, and a series circuit consisting of resistor R5 and capacitor C10 is connected between the drain and source of MOSFET Q21. A parallel circuit consisting of diode D4 and resistor R12 connects the gate and source of MOSFET Q12. A parallel circuit consisting of diode D5 and resistor R13 connects the gate and source of MOSFET Q22. MOSFETs Q11, Q12, Q21, and Q22 are driven by four drive signals provided by chip U1. The gate of MOSFET Q12 is connected to pin 10 (DRV1H) of chip U1 via capacitor C12; the gate of MOSFET Q11 is connected to pin 11 (DRV1L) of chip U1; the gate of MOSFET Q22 is connected to pin 13 (DRV2H) of chip U1 via capacitor C11; and the gate of MOSFET Q21 is connected to pin 12 (DRV2L) of chip U1. Diodes D4 and D5 are model 1N4148WS.

[0026] The current detection circuit 3 includes a resistor R10 and a capacitor C13. The resistor R10 and the capacitor C13 are connected in series between PGND and GND. One end of the capacitor C13 is connected to GND, and the other end is connected to the current sampling input pin (pin sixteen) of the chip U1.

[0027] The voltage sampling circuit 4 includes resistors R3 and R6. Resistors R3 and R6 are connected in series between the input terminals VBUS and GND. The common terminal of resistors R3 and R6 is connected to the voltage sampling input pin (pin 5) of the chip U1.

[0028] The voltage demodulation and FOD foreign object detection circuit 5 includes a diode D1, resistors R1 and R2, and capacitors C2 and C4. The positive terminal of the diode D1 is connected to the common terminal of capacitor C1 and inductor L1, and the negative terminal is connected in series with resistors R1 and R2 and then connected to GND. The two ends of resistor R2 are connected to capacitor C4. The common terminal of resistors R1 and R2 is connected to the ASK demodulation input pin (sixth pin) of the chip U1 through capacitor C2.

[0029] The indicator breathing light circuit 7 includes LEDs D2 and D3, resistors R7, R8, and R9, and a thermistor RT1. The positive terminal of LED D2 is connected to the indicator light pin (third pin) of chip U1 through resistor R8, and the negative terminal is connected to GND. The positive terminal of LED D3 is connected to the indicator light and NTC detection pin (fourth pin) of chip U1 through resistor R9, and the negative terminal is connected to GND. One end of the thermistor RT1 is connected to GND, and the other end is connected to the indicator light and NTC detection pin (fourth pin) of chip U1 through resistor R7. The resistance of the thermistor RT1 is 10KΩ.

[0030] The above embodiments are merely preferred embodiments of the present utility model and are only used to explain the present utility model, not to limit the present utility model. Any changes, substitutions, combinations, simplifications, modifications, etc., made by those skilled in the art without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A thin 10W wireless charging charger, characterized in that: Its internal circuitry includes an input rectifier circuit, a main control IC circuit, a current detection circuit, a voltage sampling circuit, a voltage demodulation and FOD foreign object detection circuit, a transmitting coil output circuit, and an indicator breathing light circuit. The input rectifier circuit includes capacitors C17 and C18 connected between the input terminals VBUS and PGND, and capacitor C15 connected between the input terminals VBUS and GND. The main control IC circuit includes chip U1, which is model IP6801. The second pin of chip U1 is connected to the input terminal VBUS. Chip U1 outputs four drive signals from pin 10 to pin 13 respectively. The output circuit of the transmitting coil includes MOSFETs Q11, Q12, Q21, and Q22 forming an H-bridge connected between the input terminals VBUS and PGND. The drains of MOSFETs Q11 and Q12 are connected, and the drains of MOSFETs Q21 and Q22 are connected. The sources of MOSFETs Q12 and Q22 are both connected to the input terminal VBUS, and the sources of MOSFETs Q11 and Q21 are both connected to PGND. A capacitor C1 and an inductor L1 forming an LC resonant circuit are connected between the drains of MOSFETs Q11 and Q21. A series circuit consisting of resistor R4 and capacitor C9 is connected between the drain and source of S-channel transistor Q11; a series circuit consisting of resistor R5 and capacitor C10 is connected between the drain and source of MOSFET Q21; a parallel circuit consisting of diode D4 and resistor R12 is connected between the gate and source of MOSFET Q12; and a parallel circuit consisting of diode D5 and resistor R13 is connected between the gate and source of MOSFET Q22. MOSFETs Q11, Q12, Q21, and Q22 are driven by four drive signals provided by chip U1. The current detection circuit includes a resistor R10 and a capacitor C13. The resistor R10 and the capacitor C13 are connected in series between PGND and GND. One end of the capacitor C13 is connected to GND, and the other end is connected to the current sampling input pin of the chip U1. The voltage sampling circuit includes resistors R3 and R6. Resistors R3 and R6 are connected in series between the input terminals VBUS and GND. The common terminal of resistors R3 and R6 is connected to the voltage sampling input pin of the chip U1. The voltage demodulation and FOD foreign object detection circuit includes a diode D1, resistors R1 and R2, and capacitors C2 and C4. The positive terminal of the diode D1 is connected to the common terminal of capacitor C1 and inductor L1, and the negative terminal is connected in series with resistors R1 and R2 and then connected to GND. The two ends of resistor R2 are connected to capacitor C4. The common terminal of resistors R1 and R2 is connected to the ASK demodulation input pin of chip U1 through capacitor C2. The indicator breathing light circuit includes LEDs D2 and D3, resistors R7, R8, and R9, and a thermistor RT1. The positive terminal of LED D2 is connected to the indicator light pin of chip U1 through resistor R8, and the negative terminal is connected to GND. The positive terminal of LED D3 is connected to the indicator light and NTC detection pin of chip U1 through resistor R9, and the negative terminal is connected to GND. One end of the thermistor RT1 is connected to GND, and the other end is connected to the indicator light and NTC detection pin of chip U1 through resistor R7.

2. The ultra-thin 10W wireless charging charger according to claim 1, characterized in that: The capacitor C1 is connected in parallel with capacitors C3, C5, and C7. The capacitor C1, C3, C5, and C7 form a parallel circuit, which is then connected in series with inductor L1.

3. The ultra-thin 10W wireless charging charger according to claim 1, characterized in that: The MOSFETs Q11, Q12, Q21, and Q22 are model AP10G02LI.

4. The ultra-thin 10W wireless charging charger according to claim 1, characterized in that: The diodes D4 and D5 are model number 1N4148WS.

5. The ultra-thin 10W wireless charging charger according to claim 1, characterized in that: The resistance of the thermistor RT1 is 10K.

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