CN203301239U

CN203301239U - Control circuit of wireless charger

Info

Publication number: CN203301239U
Application number: CN201320272007XU
Authority: CN
Inventors: 陈勤
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-04
Filing date: 2013-05-04
Publication date: 2013-11-20
Anticipated expiration: 2023-05-04

Abstract

The utility model provides the control circuit of a wireless charger, which comprises a power supply protection circuit, a capacitance-resistance and voltage-reduction circuit, a rectifier circuit, a voltage stabilizing circuit and an oscillation output circuit. The output end of the power supply protection circuit is connected with the capacitance-resistance and voltage-reduction circuit. The rectifier circuit is connected with the capacitance-resistance and voltage-reduction circuit and the voltage stabilizing circuit. The oscillation output circuit is connected with the voltage stabilizing circuit. The control circuit of the wireless charger has the advantages of simple structure and low manufacturing cost.

Description

A kind of control circuit of wireless charger

Technical field

The utility model relates to a kind of wireless charger, and particularly a kind of control circuit of wireless charger, belong to electronic applications.

Background technology

As everyone knows, the battery charging of various portable electric appts such as mobile phone, flat board is headachy things, except the electronic product because of different needs practical different chargers, also need to find suitable socket during charging, use very inconvenient.Therefore, a kind of wireless charger has appearred on market.The profile of wireless charger is as the electromagnetic stove table top, inside arranges after energising the induction type coupling that can produce the certain frequency electromagnetic field and loses, can respond to this electromagnetic inductive energy and arrange on the electronic equipment of needs charging, and be converted into electric energy, complete charging process.But the control circuit of such wireless charger is all comparatively complicated, and relative cost is higher, to application and user's practicality, has brought certain economic pressures.

The utility model content

The purpose of this utility model is to provide a kind of control circuit of wireless charger, and is complicated and expensive with the circuit that overcomes above-mentioned wireless charger control circuit.

In order to achieve the above object, the novel technical scheme of this use is as follows:

A kind of control circuit of wireless charger, the control circuit of described wireless charger comprises power protecting circuit, capacitance-resistance voltage reduction circuit, rectification circuit, voltage stabilizing circuit and vibration output circuit, and described power protecting circuit output is connected with capacitance-resistance voltage reduction circuit; Described rectification circuit is connected with resistance-capacitance depressurization resistance, voltage stabilizing circuit; Described vibration output circuit is connected with voltage stabilizing circuit.

power protecting circuit connects the alternating current 220V power supply, when power end has surge voltage to enter, the power protecting circuit back-end circuit is not damaged by surge, the power protecting circuit output connects capacitance-resistance voltage reduction circuit, the power supply output HIGH voltage is reduced to low voltage, the capacitance-resistance voltage reduction circuit output connects rectification circuit, alternating voltage after step-down is become direct current by full-bridge rectification and capacitor filtering, rectification circuit output end connects voltage stabilizing circuit, power supply by the voltage stabilizing chip after to rectifying and wave-filtering carries out voltage stabilizing, the input variation that guarantees the front end AC power is unlikely to affect the back end DC power supply, circuit output end of pressure-stabilizing connects the vibration output circuit, by coil high-frequency radiation direction space transmission electromagnetic energy.

The beneficial effects of the utility model are mainly manifested in: the utility model has been realized the advantages such as simple in structure, low cost of manufacture.

Description of drawings

For this practical content is more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein:

Fig. 1 is the circuit module pie graph of the control circuit of wireless charger of the present utility model;

Fig. 2 is the circuit diagram of the control circuit of wireless charger of the present utility model.

Embodiment

Below provide specific embodiment of the utility model, referring to Fig. 1 and Fig. 2, and be described in detail, make and can better understand function of the present utility model, characteristics.

As shown in Figure 1, the control circuit of wireless charger of the present utility model, comprise power protecting circuit (1), capacitance-resistance voltage reduction circuit (2), rectification circuit (3), voltage stabilizing circuit (4) and vibration output circuit (5).

as shown in Figure 2, terminals L, N incoming transport power supply AC220V, two inputs of power protecting circuit connect L, N, two outputs of power protecting circuit are parallel with piezo-resistance MYR and diode D1, back-end circuit is carried out surge protection, power protecting circuit output L connects decompression capacitor C1, decompression capacitor C1 two ends are parallel with dropping resistor R1, form capacitance-resistance voltage reduction circuit by C1 and R1, the capacitance-resistance voltage reduction circuit output connects the ac input end of rectification emigrant heap D2, two outputs of rectification emigrant heap D2 are parallel with diode D3 and electrolytic capacitor filter C2, the positive output end of rectification emigrant heap D2 connects respectively the input 1 of three terminal regulator U1 and the D end of field effect transistor Q3, 2 ends of three terminal regulator connect the negative terminal of DC power supply, between the output 3 of three terminal regulator U1 and DC power supply and electrolytic capacitor filter C3 and power supply indicating section LED 1 and current-limiting resistance R2 arranged, 4 pin of active crystal oscillator U2 are connected with output 3 pin of three terminal regulator U1, 2 pin of active crystal oscillator U2 are connected with power supply negative terminal, output 3 pin of active crystal oscillator U2 are connected with the G of field effect transistor Q3 end, the S end of field effect transistor Q3 is connected with the end of coil L, the other end of coil L connects the negative terminal of DC power supply.

work as L, when the N end has the AC power input, carry out step-down by the capacitance-resistance voltage reduction circuit that is formed by capacitor C 1 and resistance R 1, low alternating voltage after the capacitance-resistance voltage reduction circuit step-down is connected to rectification emigrant heap D2 and carries out full-wave rectification, pulsating direct current after rectification is carried out filtering by electrochemical capacitor C2 again, be filtered into more stable DC power supply, filtered DC power supply is carried out the stable processing of voltage again by three terminal regulator U1, avoid the fluctuation of front end AC power to cause the fluctuation of DC power supply in the certain voltage scope, the leading-out terminal parallel connection of three terminal regulator U1 power indicating circuit and electrolytic capacitor filter C3, power indicating circuit comprises LED 1 and current-limiting resistance R2, DC power supply leading-out terminal after stable is connected to 4 pin and 2 pin of active crystal oscillator U2, give active crystal oscillator U2 power supply, the waveform of the 3 pin output certain frequencies of active crystal oscillator U2 is connected to the G end of field effect transistor Q3, control the D end of field effect transistor Q3 and S hold the conducting that realizes certain frequency and by, thereby form the power supply vibration of certain frequency on coil L, thereby make the electromagnetic energy of coil L to space radiation transmission certain frequency.

Although the utility model is described with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment illustrates the utility model; should understand and wherein can make various changes and revise and not break away from a broad sense the utility model; so not conduct is to restriction of the present utility model; as long as in connotation scope of the present utility model, to variation, the distortion of the embodiment under above, all will fall into the protection range of the utility model claim.

Claims

1. the control circuit of a wireless charger, it is characterized in that: the control circuit of described wireless charger comprises power protecting circuit, capacitance-resistance voltage reduction circuit, rectification circuit, voltage stabilizing circuit and vibration output circuit, and described power protecting circuit output is connected with capacitance-resistance voltage reduction circuit; Described rectification circuit is connected with resistance-capacitance depressurization resistance, voltage stabilizing circuit; Described vibration output circuit is connected with voltage stabilizing circuit.