CN208337433U

CN208337433U - A kind of full wave bridge rectifier design circuit

Info

Publication number: CN208337433U
Application number: CN201820803943.1U
Authority: CN
Inventors: 杨建�
Original assignee: Shenzhen Han Beida Electronic Science And Technology Co Ltd
Current assignee: Shenzhen Han Beida Electronic Science And Technology Co Ltd
Priority date: 2018-05-28
Filing date: 2018-05-28
Publication date: 2019-01-04
Anticipated expiration: 2028-05-28

Abstract

The utility model discloses a kind of full wave bridge rectifiers to design circuit, including metal-oxide-semiconductor M1 to M4 and commutation controller L1 to L4, the driving pin of the commutation controller L1 to L4 is connected respectively the grid of the metal-oxide-semiconductor M1 to M4, the source electrode of the negative electrode pin connection metal-oxide-semiconductor M1 to M4 of the commutation controller L1 to L4, the negative electrode pin of the commutation controller L1 to L4 are correspondingly connected with the drain electrode of metal-oxide-semiconductor M1 to M4；First ac input end is connected to the drain electrode of the metal-oxide-semiconductor M4 and the source electrode of metal-oxide-semiconductor M1 simultaneously, second ac input end is connected to the drain electrode of the metal-oxide-semiconductor M3 and the source electrode of metal-oxide-semiconductor M2 simultaneously, first DC output end is connected to the source electrode of the metal-oxide-semiconductor M4 and the source electrode of metal-oxide-semiconductor M3 simultaneously, and the second DC output end is connected to the drain electrode of the metal-oxide-semiconductor M1 and the drain electrode of metal-oxide-semiconductor M24 simultaneously.The rectification circuit of the utility model reduces system cost, and reduce the space on printed circuit board without any heat management for high current application.

Description

A kind of full wave bridge rectifier design circuit

Technical field

The utility model relates to rectifier technical fields, design circuit more particularly to a kind of full wave bridge rectifier.

Background technique

Four diodes in conventional bridge rectifier configurations are the most conventional methods rectified to AC voltage, one Run in a bridge rectifier diode can be provided for full-bridge rectifier and motorcar alternator one it is simple, stroke It calculates and the solution of zero quiescent current, although diode usually has most fast response speed to negative voltage, they can be by In the reason of positive and negative knot forward voltage pressure drop (Vf~0.7V) and lead to higher power loss.These power losses can cause to send out Heat needs designer to execute radiating management, to increase system cost and solution size, another of diode is lacked Point is exactly that higher reverse leakage current-highest can reach about 1mA.

Utility model content

The purpose of the utility model is to overcome shortcomings in the prior art, provide a kind of full wave bridge rectifier design Circuit, to solve the problems, such as above-mentioned background technique.

The utility model is solved by following technical proposals:

A kind of full wave bridge rectifier design circuit, including metal-oxide-semiconductor M1, metal-oxide-semiconductor M2, metal-oxide-semiconductor M3, MOS pipe M4 and rectification Controller L1, commutation controller L2, commutation controller L3, commutation controller L4, the commutation controller L1 to L4 include driving Pin, negative electrode pin, negative electrode pin, the driving pin of the commutation controller L1 to L4 are connected respectively the metal-oxide-semiconductor M1 To the grid of M4, the source electrode of the negative electrode pin connection metal-oxide-semiconductor M1 to M4 of the commutation controller L1 to L4, the rectification control The drain electrode of the negative electrode pin connection metal-oxide-semiconductor M1 to M4 of device L1 to L4；

First connecting pin of ac input end is connected to the drain electrode of the metal-oxide-semiconductor M4 and the source electrode of metal-oxide-semiconductor M1 simultaneously, exchanges The second connection end of input terminal is connected to the drain electrode of the metal-oxide-semiconductor M3 and the source electrode of metal-oxide-semiconductor M2 simultaneously, and the of DC output end One connecting pin is connected to the source electrode of the metal-oxide-semiconductor M4 and the source electrode of metal-oxide-semiconductor M3 simultaneously, and the second connection end of DC output end is same When be connected to the drain electrode of the metal-oxide-semiconductor M1 and the drain electrode of metal-oxide-semiconductor M24.

Preferably, the metal-oxide-semiconductor M1 to M4 is N-channel MOS pipe.

Preferably, parasitic diode is connected between the source electrode and drain electrode of the metal-oxide-semiconductor M1 to M4.

Preferably, one end of the first connecting pin connection capacitor C of the DC output end, the second of the DC output end The other end of connecting pin connection capacitor C.

Preferably, the commutation controller is the intelligent diode rectification controller of model LM74670-Q1.

Preferably, the model of the N-channel MOS pipe is CSD18532KCS.

The utility model have the following advantages that compared with prior art and the utility model has the advantages that

1, the utility model is integrally disposed by metal-oxide-semiconductor and commutation controller, substitutes the diode in conventional rectifier circuit, greatly Width improves rectification efficiency, and rectification efficiency improves 10 times big compared to conventional rectifier circuit.

2, the rectification circuit of the utility model reduces system cost without any heat management for high current application, And reduce the space on printed circuit board.

3, the utility model supports the higher frequency for being up to 400Hz, and the AC voltage level of up to 45V, this make its at For the suitable alternative device of motorcar alternator application.

Detailed description of the invention

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

Fig. 1 is the circuit diagram that a kind of full wave bridge rectifier designs circuit.

Fig. 2 and Fig. 3 is the rectification schematic illustration that a kind of full wave bridge rectifier designs circuit.

Fig. 4 is the power consumption comparison diagram that a kind of full wave bridge rectifier designs circuit and traditional circuit.

Specific embodiment

The present invention will be further described in detail with reference to the embodiments and the accompanying drawings, but the implementation of the utility model Mode is without being limited thereto.

The specific implementation process of the utility model is as follows:

As shown in Figure 1, a kind of full wave bridge rectifier designs circuit, including metal-oxide-semiconductor M1, metal-oxide-semiconductor M2, MOS pipe M3, MOS Pipe M4 and commutation controller L1, commutation controller L2, commutation controller L3, commutation controller L4, the commutation controller L1 is extremely L4 includes driving pin 1, negative electrode pin 2, negative electrode pin 3,1 company of respectively corresponding of driving pin of the commutation controller L1 to L4 The grid of the metal-oxide-semiconductor M1 to M4 is connect, the negative electrode pin 2 of the commutation controller L1 to L4 connects the source electrode of metal-oxide-semiconductor M1 to M4, The negative electrode pin 3 of the commutation controller L1 to L4 is correspondingly connected with the drain electrode of metal-oxide-semiconductor M1 to M4；

The first connecting pin A1 of ac input end ACinput is connected to drain electrode and the metal-oxide-semiconductor M1 of the metal-oxide-semiconductor M4 simultaneously Source electrode, the second connection end A2 of ac input end ACinput is simultaneously connected to drain electrode and the metal-oxide-semiconductor M2 of the metal-oxide-semiconductor M3 Source electrode, the first connecting pin D1 of DC output end DC Output are connected to the source electrode of the metal-oxide-semiconductor M4 with metal-oxide-semiconductor M3's simultaneously Source electrode, the second connection end D2 of DC output end DC Output are connected to the drain electrode of the metal-oxide-semiconductor M1 with metal-oxide-semiconductor M24's simultaneously Drain electrode.

The metal-oxide-semiconductor M1 to M4 is N-channel MOS pipe.

Parasitic diode, two poles between source electrode and drain electrode are connected between the source electrode and drain electrode of the metal-oxide-semiconductor M1 to M4 The effect of pipe is in the case where preventing VDD over-voltage, to burn out metal-oxide-semiconductor, because before over-voltage damages MOS pipe, diode High current is directly arrived ground, so that metal-oxide-semiconductor be avoided to be burned by first reverse breakdown.

One end of the first DC output end connection capacitor C, the second DC output end connection capacitor C's is another End.

The commutation controller is the intelligent diode rectification controller of model LM74670-Q1.

The model of the N-channel MOS pipe is CSD18532KCS.

The working principle of the utility model are as follows: please refer to Fig. 2 to Fig. 4, in the present embodiment, N-channel MOS pipe M1 to M4 is logical Source conduction of the corresponding commutation controller L1 to L4 by electric current from metal-oxide-semiconductor M1 to M4 is crossed to drain electrode, and in AC sine wave Negative cycle in quick closedown metal-oxide-semiconductor M1 to M4 grid.Metal-oxide-semiconductor in circuit and charge pump capacitor is integrally disposed, rectification Controller L1 to L4 suspends topology and charge pump with one to realize the rectification purpose of the present embodiment circuit.Metal-oxide-semiconductor and rectification are controlled The integrated each unit independent operating of device processed, and AC input waveform is responded respectively, commutation controller L1 to L4 sun Pole pin and negative electrode pin persistently sense the voltage on metal-oxide-semiconductor M1 to M2, and corresponding come on or off according to polarity of voltage The grid of metal-oxide-semiconductor M1 to M2.Within the positive period of AC waveform, metal-oxide-semiconductor M1 and M3 conducting, and the grid of MOS pipe M2 and M4 are right Commutation controller L2 and the L4 shutdown answered, as shown in Fig. 2, when AC waveform becomes negative value, rectification control corresponding with M1 and M3 Device L1 and L3 processed responds negative voltage within the time of 2 μ s, and turns off the grid of corresponding metal-oxide-semiconductor M1 and M3, while MOS Pipe M2 and M4 are switched on.Metal-oxide-semiconductor M1 to M4 in the present embodiment have gate source voltage (VGS) threshold values less than or equal to 3V with And low grid capacitance, another important electric parameter are the voltage on metal-oxide-semiconductor M1 to M4 diode, this value must be low It is 0.48V or so when exporting electric current.

Compare the rectification circuit and conventional low forward voltage drop diode (Vf=0.5V) rectification circuit of the present embodiment Between hot property, two designs all operate under high current (10A), and do not have heat management and air mass flow condition.Diode The temperature of single diode reaches about 71 DEG C in rectification circuit, and the metal-oxide-semiconductor in the present embodiment rectification circuit is equally being run Under the conditions of temperature be about 31 DEG C, temperature is greatly reduced, and utilizes rectifier no setting is required radiating element, the energy of the utility model Production cost is enough reduced, life of product is improved.The utility model is using 4 N-channel MOS pipe M1 to M2 instead of conventional rectifier electricity The diode of Lu Zhonggao loss, it is whole to be greatly reduced can to eliminate the forward voltage drop of diode rectifier in conventional rectifier circuit The power loss of current circuit.N-channel MOS pipe has small RDSON, and their relevant pressure drops are also the smallest, the table of Fig. 4 In be in traditional circuit using between 5A (Irms=3.5A) diode rectifier circuit and the rectification circuit of the present embodiment Power consumption compares, it is evident that after the present embodiment is using metal-oxide-semiconductor and commutation controller, power consumption is greatly reduced.

Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.

Claims

1. a kind of full wave bridge rectifier designs circuit, it is characterised in that: including metal-oxide-semiconductor M1, metal-oxide-semiconductor M2, metal-oxide-semiconductor M3, metal-oxide-semiconductor M4 and commutation controller L1, commutation controller L2, commutation controller L3, commutation controller L4, the commutation controller L1 to L4 Including driving pin, negative electrode pin, negative electrode pin, the driving pin of the commutation controller L1 to L4 is connected respectively described The grid of metal-oxide-semiconductor M1 to M4, the source electrode of the negative electrode pin connection metal-oxide-semiconductor M1 to M4 of the commutation controller L1 to L4 are described whole The negative electrode pin of stream controller L1 to L4 is correspondingly connected with the drain electrode of metal-oxide-semiconductor M1 to M4；

First connecting pin of ac input end is connected to the drain electrode of the metal-oxide-semiconductor M4 and the source electrode of metal-oxide-semiconductor M1, exchange input simultaneously The second connection end at end is connected to the drain electrode of the metal-oxide-semiconductor M3 and the source electrode of metal-oxide-semiconductor M2, the first connection of DC output end simultaneously It holds while being connected to the source electrode of the metal-oxide-semiconductor M4 and the source electrode of metal-oxide-semiconductor M3, the second connection end of DC output end is connected to simultaneously The drain electrode of the metal-oxide-semiconductor M1 and the drain electrode of metal-oxide-semiconductor M2.

2. a kind of full wave bridge rectifier according to claim 1 designs circuit, it is characterised in that: the metal-oxide-semiconductor M1 is extremely M4 is N-channel MOS pipe.

3. a kind of full wave bridge rectifier according to claim 1 designs circuit, it is characterised in that: the metal-oxide-semiconductor M1 is extremely Parasitic diode is connected between the source electrode and drain electrode of M4.

4. a kind of full wave bridge rectifier according to claim 1 designs circuit, it is characterised in that: the DC output end The first connecting pin connection capacitor C one end, the DC output end second connection end connection capacitor C the other end.

5. a kind of full wave bridge rectifier according to claim 1 designs circuit, it is characterised in that: the commutation controller For the intelligent diode rectification controller of model LM74670-Q1.

6. a kind of full wave bridge rectifier according to claim 2 designs circuit, it is characterised in that: the N-channel MOS pipe Model be CSD18532KCS.