CN206412947U

CN206412947U - A kind of AC/DC module power supply circuits

Info

Publication number: CN206412947U
Application number: CN201720051200.9U
Authority: CN
Inventors: 徐名顺
Original assignee: Guangzhou Universal Electronics Co Ltd
Current assignee: Guangzhou Universal Electronics Co Ltd
Priority date: 2017-01-14
Filing date: 2017-01-14
Publication date: 2017-08-15
Anticipated expiration: 2027-01-14

Abstract

The utility model is related to a kind of AC/DC module power supply circuits, including：AC input terminal circuit, AC/DC change-over circuits and DC circuit of output terminal；The AC input terminal circuit includes protective tube FUSE, thermistor NTC, piezo-resistance MOV, electric capacity C3, electric capacity C4, electric capacity C5, common mode inductance NF, the AC/DC change-over circuits are transformed into after D/C power to the AC power supplies of input, and D/C power is exported to DC circuit of output terminal；The DC circuit of output terminal includes electric capacity C1, electric capacity C2, TVS pipe and load.The simple science of the utility model circuit design; input AC can be prevented effectively from by protective tube FUSE to overload; piezo-resistance MOV can be protected effectively to lightning surge, and electric capacity can be effectively filtered out to the noise signal in circuit, it is ensured that pure and conversion the high efficiency of voltage.

Description

A kind of AC/DC module power supply circuits

Technical field

The utility model is related to modular power source technical field, more particularly to a kind of AC/DC module power supply circuits.

Background technology

At present, electronic product is developed rapidly, and the usual volume of AC/DC modular power source products of in the market is larger, is passed The power frequency AC/DC power inputs scope of system is limited, and mains input voltage need to be transformed into relatively low alternating voltage, then carry out whole Stream becomes required DC voltage, in AC/DC module power supply circuits, and overvoltage protection and lightning protection wave are carried out to the alternating current of input Protection is gushed, the direct current of output is carried out going high-frequency noise to protect and late-class circuit is protected, extremely important, existing AC/DC moulds Block power circuit complex circuit designs, the low shortcoming of circuit protection efficiency, therefore, prior art need to improve.

Utility model content

The utility model discloses a kind of AC/DC module power supply circuits, to solve problems of the prior art.

A kind of AC/DC module power supply circuits, including：

AC input terminal circuit, AC/DC change-over circuits and DC circuit of output terminal；

The AC input terminal circuit include protective tube FUSE, thermistor NTC, piezo-resistance MOV, electric capacity C3, electric capacity C4, Electric capacity C5, common mode inductance NF, the AC power supplies live wire and zero line by voltage after protective tube FUSE, thermistor NTC, It is in parallel with electric capacity C3 by piezo-resistance MOV, electric capacity C4, it is in parallel with common mode inductance NF, after electric capacity C5 parallel circuit, be AC/DC change-over circuits provide AC power supplies input；

The AC/DC change-over circuits are transformed into after D/C power to the AC power supplies of input, and D/C power is exported to DC and exported Terminal circuit；

The DC circuit of output terminal includes electric capacity C1, electric capacity C2, TVS pipe and load, the electric capacity C1, electric capacity C2, TVS Pipe, load are in parallel.

In another embodiment based on above-mentioned AC/DC module power supply circuits, the electric capacity C1 is ceramic condenser, is used for High-frequency noise is removed, the electric capacity C2 is high frequency low-resistance electrochemical capacitor, and the voltage volume of resistance to pressure drop is more than 80%, after the TVS pipe is Level protection circuit.

In another embodiment based on above-mentioned AC/DC module power supply circuits, the protective tube FUSE is 0.5A/250V Slowly disconnected protective tube, the model 561KD14 of the piezo-resistance MOV, protected during for lightning surge AC/DC modular power sources not by Damage, the electric capacity C3, electric capacity C4 are 2200pF/400V, the electric capacity C5 is that 0.1-0.33 μ F/300V, common mode inductance NF are 15mH-30mH。

Compared with prior art, the utility model has advantages below：

The simple science of the utility model circuit design, can be prevented effectively from input AC by protective tube FUSE and overload, pressure-sensitive Resistance MOV can be protected effectively to lightning surge, and electric capacity can be effectively filtered out to the noise signal in circuit, it is ensured that electricity Pure and conversion the high efficiency of pressure.

Below by drawings and examples, the technical solution of the utility model is described in further detail.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the accompanying drawing used in description of the prior art does one and simply introduced.

Fig. 1 is a kind of schematic diagram of AC/DC module power supply circuits of the present utility model.

Fig. 2 is a kind of circuit diagram of AC/DC module power supply circuits of the present utility model.

In figure：1AC inlet circuits, 2AC/DC change-over circuits, 3DC circuit of output terminal.

Embodiment

It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched The embodiment stated is only a part of embodiment of the utility model, rather than whole embodiments.

Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of the utility model protection.

As shown in Figure 1 and Figure 2, the AC/DC module power supply circuits include：

AC input terminal circuit 1, AC/DC change-over circuits 2 and DC circuit of output terminal 3；

The AC input terminal circuit 1 includes protective tube FUSE, thermistor NTC, piezo-resistance MOV, electric capacity C3, electric capacity C4, electric capacity C5, common mode inductance NF, the voltage that the AC power supplies live wire and zero line pass through through protective tube FUSE, thermistor NTC with Afterwards, it is in parallel with electric capacity C3 by piezo-resistance MOV, electric capacity C4, it is in parallel with common mode inductance NF, with electric capacity C5 parallel circuit with Afterwards, it is that AC/DC change-over circuits 2 provide AC power supplies input；

The AC power supplies of 2 pairs of inputs of AC/DC change-over circuits is transformed into after D/C power, and D/C power is exported to DC and exported Terminal circuit 3；

The DC circuit of output terminal 3 includes electric capacity C1, electric capacity C2, TVS pipe and load, the electric capacity C1, electric capacity C2, TVS Pipe, load are in parallel.

The electric capacity C1 is ceramic condenser, and for removing high-frequency noise, the electric capacity C2 is high frequency low-resistance electrochemical capacitor, electricity The volume of resistance to pressure drop of pressure is more than 80%, and the TVS pipe is rear class protection circuit.

The protective tube FUSE is 0.5A/250V disconnected protective tube, the model 561KD14 of the piezo-resistance MOV slowly, is used Protect AC/DC modular power sources without damage when lightning surge, the electric capacity C3, electric capacity C4 are 2200pF/400V, the electric capacity C5 is 0.1-0.33 μ F/300V, and common mode inductance NF is 15mH-30mH.

The AC/DC change-over circuits 2 have small product size small, input and output 3000VAC isolation, input ac voltage scope For：85-305V, exporting DC voltage range is：120-430V, with output short-circuit and overcurrent protection function.

A kind of AC/DC module power supply circuits provided by the utility model are described in detail above, herein should Principle of the present utility model and embodiment are set forth with specific case, the explanation of above example is only intended to side Assistant solves method of the present utility model and its core concept；It is new according to this practicality simultaneously for those of ordinary skill in the art The thought of type, be will change in specific embodiments and applications, in summary, and this specification content should not be managed Solve as to limitation of the present utility model.

Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, this is not limited to Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic Equivalent substitution is carried out, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements made etc., It should be included within protection domain of the present utility model.

Claims

1. a kind of AC/DC module power supply circuits, it is characterised in that including：

The AC input terminal circuit includes protective tube FUSE, thermistor NTC, piezo-resistance MOV, electric capacity C3, electric capacity C4, electric capacity C5, common mode inductance NF, the AC power supplies live wire and zero line by voltage after protective tube FUSE, thermistor NTC, pass through Piezo-resistance MOV, electric capacity C4 are in parallel with electric capacity C3, in parallel with common mode inductance NF, are AC/ after electric capacity C5 parallel circuit DC change-over circuits provide AC power supplies input；

The AC/DC change-over circuits are transformed into after D/C power to the AC power supplies of input, and D/C power is exported to DC output ends electricity Road；

The DC circuit of output terminal includes electric capacity C1, electric capacity C2, TVS pipe and load, the electric capacity C1, electric capacity C2, TVS pipe, negative Carry in parallel.

2. AC/DC module power supply circuits according to claim 1, it is characterised in that the electric capacity C1 is ceramic condenser, is used In removing high-frequency noise, the electric capacity C2 is high frequency low-resistance electrochemical capacitor, and the voltage volume of resistance to pressure drop is more than 80%, and the TVS pipe is Rear class protection circuit.

3. AC/DC module power supply circuits according to claim 1, it is characterised in that the protective tube FUSE is 0.5A/ 250V slowly break protective tube, the model 561KD14 of the piezo-resistance MOV, during for lightning surge protect AC/DC modular power sources Without damage, the electric capacity C3, electric capacity C4 are 2200pF/400V, and the electric capacity C5 is 0.1-0.33 μ F/300V, common mode inductance NF is 15mH-30mH.