CN210273526U

CN210273526U - Intelligent driving circuit of wireless charger

Info

Publication number: CN210273526U
Application number: CN201921129792.7U
Authority: CN
Inventors: 朱宁; 黄文益; 朱俊辉
Original assignee: Shenzhen Kaka Interconnection Technology Co ltd
Current assignee: Shenzhen Kaka Interconnection Technology Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-04-07
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses an intelligent drive circuit of wireless charger, including controller MCU, resistance R1, electric capacity C1, coil L1, diode D1 and field effect transistor Q1, ground resistance R2 is connected respectively to resistance R1 one end, resistance R6 and controller MCU ' S pulse pin PWM0, field effect transistor Q2 ' S the G utmost point is connected to the resistance R1 other end, field effect transistor Q2 ' S S utmost point ground connection, field effect transistor Q2 ' S the D utmost point is connecting resistance R5 and field effect transistor Q1 ' S the G utmost point respectively, diode D1 negative pole and electric capacity C1 are connected respectively to the resistance R5 other end, the anodal power VDD of connecting of diode D1. The utility model discloses wireless charger's intelligent drive circuit has field effect transistor drive function, can drive characteristics such as field effect transistor full-bridge, can replace field effect transistor driver chip module, has advantages such as with low costs, the circuit is succinct.

Description

Intelligent driving circuit of wireless charger

Technical Field

The utility model relates to a drive circuit specifically is an intelligent drive circuit of wireless charger.

Background

Wireless charging technology (english: Wireless charging technology; Wireless charging technology) is derived from Wireless power transmission technology, and can be divided into two modes of low-power Wireless charging and high-power Wireless charging.

The low-power wireless charging is usually performed by electromagnetic induction, such as Qi charging for mobile phones. High-power wireless charging usually adopts a resonance mode (the mode is adopted by most electric vehicles) and energy is transmitted to a device for power utilization by a power supply device (a charger), and the device charges a battery by using received energy and is used for self operation.

The existing low-power wireless charging basically adopts a special field effect transistor driving chip to drive an internal field effect transistor, has the defect of higher cost, and also causes the slow popularization speed of wireless charging.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an intelligent drive circuit of wireless charger to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an intelligent driving circuit of a wireless charger comprises a controller MCU, a resistor R1, a capacitor C1, a coil L1, a diode D1 and a field effect tube Q1, wherein one end of the resistor R1 is respectively connected with a grounding resistor R2, a resistor R6 and a pulse pin PWM0 of the controller MCU, the other end of the resistor R1 is connected with a G pole of the field effect tube Q2, an S pole of the field effect tube Q2 is grounded, a D pole of the field effect tube Q2 is respectively connected with a G pole of the resistor R2 and a G pole of the field effect tube Q2, the other end of the resistor R2 is respectively connected with a cathode of the diode D2 and the capacitor C2, an anode of the diode D2 is connected with a power supply VDD, a D pole of the field effect tube Q2 is connected with a power supply VCC, the other end of the capacitor C2 is respectively connected with the S pole of the coil L2, the S pole of the field effect tube Q2 and the D pole of the field effect tube Q2, the other end of the capacitor C2 is respectively connected with the capacitor L2, the S pole of the field effect transistor Q4 and the D pole of the field effect transistor Q6, the D pole of the field effect transistor Q4 is connected with a power supply VCC, the S pole of the field effect transistor Q6 is grounded, the G pole of the field effect transistor Q4 is connected with the D poles of the resistor R7 and the field effect transistor Q5 respectively, the other end of the resistor R7 is connected with the other end of the capacitor C2 and the cathode of the diode D2 respectively, the anode of the diode D2 is connected with a power supply VDD, the G pole of the field effect transistor Q6 is connected with the resistor R8, the other end of the resistor R8 is connected with the resistor R3, the ground resistor R4 and the pulse pin PWM1 of the controller MCU, and the S.

As a further aspect of the present invention: the field effect transistors Q1, Q3, Q4 and Q6 are field effect transistors with damping.

As a further aspect of the present invention: the diode D2, the resistor R7 and the capacitor C2 form a bootstrap booster circuit.

As a further aspect of the present invention: the diode D1, the resistor R5 and the capacitor C1 form a bootstrap booster circuit.

As a further aspect of the present invention: the controller MCU is a controller at least comprising two pins with pulse width modulation function.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses wireless charger's intelligent drive circuit has field effect transistor drive function, can drive characteristics such as field effect transistor full-bridge, can replace field effect transistor driver chip module, has advantages such as with low costs, the circuit is succinct.

Drawings

Fig. 1 is a circuit diagram of the intelligent driving circuit of the wireless charger of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model relates to an intelligent drive circuit of wireless charger, export two way complementary signal PWM0 and PWM1 by controller MCU, drive field effect transistor Q1, Q3, Q4, the H full bridge circuit that Q6 constitutes, when field effect transistor Q1, when Q6 switches on, field effect transistor Q3, Q4 ends, when field effect transistor Q3, Q4 switches on, field effect transistor Q1, Q6 ends, and then make the oscillation of coil L1 send wireless power.

As an embodiment of the present invention, the field effect transistors Q1, Q3, Q4, and Q6 are field effect transistors with damping.

As an embodiment of the present invention, the controller MCU is a controller including at least two pins with pulse width modulation function.

Referring to fig. 1, fig. 1 is a circuit diagram of an intelligent driving circuit of a wireless charger according to the present invention, including a controller MCU, a resistor R1, a capacitor C1, a coil L1, a diode D1 and a fet Q1, wherein one end of the resistor R1 is connected to a ground resistor R2, a resistor R6 and a pulse pin PWM0 of the controller MCU, the other end of the resistor R1 is connected to a G pole of the fet Q2, an S pole of the fet Q2 is grounded, a D pole of the fet Q2 is connected to a G pole of the resistor R5 and the fet Q1, the other end of the resistor R5 is connected to a negative pole of the diode D1 and a capacitor C1, an anode of the diode D1 is connected to a power supply VDD, a D pole of the fet Q1 is connected to a power supply VCC, the other end of the capacitor C1 is connected to a D pole of the coil L1, an S pole of the fet Q1 is grounded, and a resistor Q1 is connected to a G pole of the fet Q1, the other end of the coil L1 is connected with a capacitor C, the other end of the capacitor C is connected with an S pole of a capacitor C2, an S pole of a field-effect tube Q4 and a D pole of a field-effect tube Q6 respectively, the D pole of the field-effect tube Q4 is connected with a power supply VCC, the S pole of the field-effect tube Q6 is grounded, the G pole of the field-effect tube Q4 is connected with a D pole of a resistor R7 and a D pole of a field-effect tube Q5 respectively, the other end of the resistor R7 is connected with the other end of the capacitor C2 and the cathode of a diode D2 respectively, the anode of the diode D2 is connected with a power supply VDD, the G pole of the field-effect tube Q6 is connected with a resistor R8, the other end of the resistor R8 is connected.

Specifically, the utility model discloses two way complementary signal PWM0 and PWM1 by controller MCU output, PWM0 divides voltage to field effect transistor Q2 control pole through resistance R1, by field effect transistor Q2 drain-controlled field effect transistor Q1, another way divides voltage to field effect transistor Q3 control pole through resistance R6, resistance R2 is pull-down resistance, diode D1, resistance R5, electric capacity C1 constitutes the bootstrap voltage-boosting circuit, diode D2, resistance R7 and electric capacity C2 constitute the bootstrap voltage-boosting circuit, PWM1 divides voltage to field effect transistor Q5 control pole through resistance R3, by field effect transistor Q5 drain-controlled field effect transistor Q4, another way divides voltage to field effect transistor Q6 control pole through resistance R8, resistance R4 is pull-down resistance, 4 field effect transistors Q1, Q3, Q4, Q6 constitute H full-bridge output, when the field effect transistors Q1 and Q6 are turned on, the field effect transistors Q3 and Q4 are turned off, and when the field effect transistors Q3 and Q4 are turned on, the field effect transistors Q1 and Q6 are turned off.

To sum up, the utility model has the characteristics of field effect transistor drive function can drive field effect transistor full-bridge etc, can replace field effect transistor driver chip module, has advantages such as with low costs, the circuit is succinct.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. An intelligent driving circuit of a wireless charger comprises a controller MCU, a resistor R1, a capacitor C1, a coil L1, a diode D1 and a field effect transistor Q1, and is characterized in that one end of the resistor R1 is respectively connected with a grounding resistor R2, a resistor R6 and a pulse pin PWM0 of the controller MCU, the other end of the resistor R1 is connected with a G pole of a field effect transistor Q2, an S pole of the field effect transistor Q2 is grounded, a D pole of the field effect transistor Q2 is respectively connected with a resistor R5 and a G pole of a field effect transistor Q1, the other end of the resistor R5 is respectively connected with a cathode of the diode D5 and the capacitor C5, an anode of the diode D5 is connected with a power supply VDD, a D pole of the field effect transistor Q5 is connected with a power supply VCC, the other end of the capacitor C5 is respectively connected with the S pole of the coil L5, the S pole of the field effect transistor Q5 and the D pole of the field effect transistor Q5, the other end of the coil R5 is connected with the, the other end of the capacitor C is connected with a capacitor C2, an S pole of a field effect transistor Q4 and a D pole of a field effect transistor Q6 respectively, the D pole of the field effect transistor Q4 is connected with a power supply VCC, the S pole of the field effect transistor Q6 is grounded, the G pole of the field effect transistor Q4 is connected with a resistor R7 and the D pole of the field effect transistor Q5 respectively, the other end of a resistor R7 is connected with the other end of a capacitor C2 and the cathode of a diode D2 respectively, the anode of the diode D2 is connected with a power supply VDD, the G pole of the field effect transistor Q6 is connected with a resistor R8, the other end of the resistor R8 is connected with a resistor R3, a ground resistor R4 and a pulse pin PWM1 of.

2. The intelligent driving circuit of the wireless charger according to claim 1, wherein the fets Q1, Q3, Q4, Q6 are damped fets.

3. The intelligent driving circuit of the wireless charger according to claim 2, wherein the diode D2, the resistor R7 and the capacitor C2 form a bootstrap voltage boosting circuit.

4. The intelligent driving circuit of the wireless charger according to claim 3, wherein the diode D1, the resistor R5 and the capacitor C1 form a bootstrap voltage boosting circuit.

5. The intelligent driving circuit of the wireless charger according to claim 4, wherein the controller MCU is a controller including at least two pins with pulse width modulation function.