CN208143082U - A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit - Google Patents
A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit Download PDFInfo
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- CN208143082U CN208143082U CN201820489475.5U CN201820489475U CN208143082U CN 208143082 U CN208143082 U CN 208143082U CN 201820489475 U CN201820489475 U CN 201820489475U CN 208143082 U CN208143082 U CN 208143082U
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Abstract
A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit, including coupling inductance, weighting circuit；Coupling inductance is connected respectively accesses two-way secondary output circuit, and the parallel connection of doubleway output end accesses weighting circuit, feed circuit is accessed through integration, to control the stabilization of output voltage.The utility model is by using inductive coupling, make multiple-channel output current change quantity mutual induction, improve inductive current pulsation, to keep the proportionate relationship between multiple-channel output voltage, and utilize the principle of weighting, main output voltage and auxiliary output voltage are sampled feedback by certain weight proportion, to make auxiliary output voltage also can be as main output voltage, certain adjustment effect can be played to duty ratio, the variation of auxiliary output voltage is set to obtain a degree of improvement, to improve the cross regulation rate of output voltage.
Description
Technical field
The utility model relates to field of switch power, it is related to a kind of the excellent of doubleway output reverse exciting switching voltage regulator cross regulation rate
Change circuit design.
Background technique
The Switching Power Supply of multiple-channel output is widely used in low power various Complex Electronic Systems Based power supplies.For more
The case where road exports, usually only output voltage are low, output curent change range is big carries out feedback tune as main circuit all the way
Section control, to guarantee to keep output voltage stabilization in input voltage and load variation.Ideally, auxiliary output voltage with
Main output voltage meets the relationship of transformer turn ratio, as long as main output voltage is made to keep stablizing, auxiliary output voltage
It is able to maintain stabilization.But actually due to resistance, the current loop parasitic parameter etc. of leakage inductance, winding between by each winding of transformer
Influence, auxiliary output voltage changes with the variation of output loading.Usually when main output is fully loaded, auxiliary output is at light load, auxiliary
Help output voltage that will increase；And when main output is lightly loaded, auxiliary output full load, auxiliary output voltage will reduce.Here it is two-ways
The problem of output switch power source cross regulation rate.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of optimization circuit arrangement, it is therefore intended that improve doubleway output flyback
The problem of Switching Power Supply cross regulation rate, makes to assist output pulsation within an acceptable range, improves the precision of voltage regulation, and volume is subtracted
Small, cost is reduced cost.
To achieve the goals above, the utility model uses following technical scheme.
A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit of the present invention, including coupling inductance, weighting
Circuit.Coupling inductance is connected respectively accesses two-way secondary output circuit, and the parallel connection of doubleway output end accesses weighting circuit, connects through integration
Enter feed circuit, to control the stabilization of output voltage.
The coupling inductance be by L1, L2 using and around by the way of be wound on same magnetic core, secondary coil one all the way
End ground connection, another termination rectifier diode D1 anode, diode cathode are connect with coupling inductance L1 coil one end, coupling inductance L1
Another termination filter capacitor C1 pressure stabilizing output of coil.Another way secondary coil one end ground connection, another termination rectifier diode D2 sun
Pole, diode cathode are connect with coupling inductance L2 coil one end, and another termination filter capacitor C2 pressure stabilizing of coupling inductance L2 coil is defeated
Out.
The weighting circuit is made of R1, R2, R3, and pressure stabilizing output connects the one end R1 all the way, and another way pressure stabilizing output meets R2
One end, the R1 other end and the R2 other end are connected in the one end R3, R3 other end ground connection.R3 high-voltage end is sampled voltage, access
Feed circuit constitutes feedback loop.
As shown from the above technical solution, the utility model makes multiple-channel output current change quantity phase by using inductive coupling
Mutual induction improves inductive current pulsation, to keep the proportionate relationship between multiple-channel output voltage, and utilizes the principle of weighting,
Main output voltage and auxiliary output voltage are sampled feedback by certain weight proportion, so that auxiliary output voltage be made also
As main output voltage, certain adjustment effect can be played to duty ratio, obtains the variation of auxiliary output voltage centainly
The improvement of degree, to improve the cross regulation rate of output voltage.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Specific embodiment
Is described further to the utility model with reference to the accompanying drawing
As shown in Figure 1, a kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit of the present embodiment, including inductance coupling
Close design and weighting circuit.Two coils of coupling inductance are connected respectively accesses two-way secondary output circuit, output termination sampling electricity
It hinders fraction in parallel and acquires output voltage, feed circuit is accessed through integration, to control the stabilization of output voltage.
Coupling inductance design be by L1, L2 using and around by the way of be wound on same magnetic core, secondary coil one end all the way
Ground connection, another termination rectifier diode D1 anode, diode cathode are connect with coupling inductance L1 coil one end, coupling inductance L1 line
Enclose another termination filter capacitor C1 pressure stabilizing output.Another way secondary coil one end ground connection, another termination rectifier diode D2 anode,
Diode cathode is connect with coupling inductance L2 coil one end, another termination filter capacitor C2 pressure stabilizing output of coupling inductance L2 coil.
By inductive coupling, make multiple-channel output current change quantity mutual induction, improve inductive current pulsation, to keep multiple-channel output electric
Proportionate relationship between pressure improves load cross regulation rate.
Weighting circuit is made of R1, R2, R3, and pressure stabilizing output connects the one end R1 all the way, and another way pressure stabilizing output meets the one end R2, R1
The other end and the R2 other end are connected in the one end R3, R3 other end ground connection.R3 high-voltage end is sampled voltage, accesses feed circuit
Constitute feedback loop.Using the principle of weighting, main output voltage and auxiliary output voltage are taken by certain weight proportion
Sample feedback, so that auxiliary output voltage is made also can to play certain adjustment effect to duty ratio as main output voltage,
The variation of auxiliary output voltage is set to obtain a degree of improvement, to improve the cross regulation rate of output voltage.Weighted factor
Size determines the working characteristics of circuit and the selection of feedback compensation circuit, so reasonable selection, then can greatly improve
The intersection regulation rate of power supply.
Embodiment described above is only described preferred embodiments of the present invention, not practical new to this
The range of type is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this reality
The various changes and improvements made with novel technical solution should all fall into the protection model that the utility model claims book determines
In enclosing.
Claims (1)
1. a kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit, it is characterized in that including coupling inductance, weighting circuit；Coupling
Conjunction inductance is connected respectively accesses two-way secondary output circuit, and the parallel connection of doubleway output end accesses weighting circuit, feeds back through integration access
Circuit, to control the stabilization of output voltage；
The coupling inductance be by L1, L2 using and around by the way of be wound on same magnetic core, all the way secondary coil one terminate
Ground, another termination rectifier diode D1 anode, diode cathode are connect with coupling inductance L1 coil one end, coupling inductance L1 coil
Another termination filter capacitor C1 pressure stabilizing output；Another way secondary coil one end ground connection, another termination rectifier diode D2 anode, two
Pole pipe cathode is connect with coupling inductance L2 coil one end, another termination filter capacitor C2 pressure stabilizing output of coupling inductance L2 coil；
The weighting circuit is made of R1, R2, R3, and pressure stabilizing output connects the one end R1 all the way, and another way pressure stabilizing output connects the one end R2,
The R1 other end and the R2 other end are connected in the one end R3, R3 other end ground connection；R3 high-voltage end is sampled voltage, access feedback electricity
Road constitutes feedback loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820489475.5U CN208143082U (en) | 2018-04-09 | 2018-04-09 | A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820489475.5U CN208143082U (en) | 2018-04-09 | 2018-04-09 | A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208143082U true CN208143082U (en) | 2018-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820489475.5U Expired - Fee Related CN208143082U (en) | 2018-04-09 | 2018-04-09 | A kind of doubleway output reverse exciting switching voltage regulator cross regulation rate circuit |
Country Status (1)
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| CN (1) | CN208143082U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165902A (en) * | 2019-06-17 | 2019-08-23 | 深圳创维－Rgb电子有限公司 | A kind of power-supply system and television set |
| CN115425853A (en) * | 2022-09-22 | 2022-12-02 | 东科半导体(安徽)股份有限公司 | Optimization circuit for cross regulation rate of two paths of output of flyback power supply |
-
2018
- 2018-04-09 CN CN201820489475.5U patent/CN208143082U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165902A (en) * | 2019-06-17 | 2019-08-23 | 深圳创维－Rgb电子有限公司 | A kind of power-supply system and television set |
| CN110165902B (en) * | 2019-06-17 | 2020-12-22 | 深圳创维－Rgb电子有限公司 | Power supply system and television |
| CN115425853A (en) * | 2022-09-22 | 2022-12-02 | 东科半导体(安徽)股份有限公司 | Optimization circuit for cross regulation rate of two paths of output of flyback power supply |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20190409 |
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| CF01 | Termination of patent right due to non-payment of annual fee |