CN207069931U - A kind of voltage crossover regulation adjustment circuit - Google Patents
A kind of voltage crossover regulation adjustment circuit Download PDFInfo
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- CN207069931U CN207069931U CN201720754061.6U CN201720754061U CN207069931U CN 207069931 U CN207069931 U CN 207069931U CN 201720754061 U CN201720754061 U CN 201720754061U CN 207069931 U CN207069931 U CN 207069931U
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- voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model provides a kind of voltage crossover regulation adjustment circuit, multiple-channel output is used in supply convertor, and when being single channel feedback regulation, zero load or jump Larger Dynamic load on primary feedback road, under conditions of bypass band relatively large load (main road voltage is higher than bypass), solves the problems, such as bypass output voltage shakiness.Main road fictitious load need not additionally be increased, stand-by power consumption and efficiency can be done higher.Double feedback regulations need not be used, the precision of voltage regulation of main road is more preferable, and feedback control loop is easily adjusted.
Description
Technical field
A kind of circuit is the utility model is related to, more particularly to a kind of voltage crossover regulation adjustment circuit.
Background technology
Current supply convertor is divided to single channel output and two kinds of situations of multiple-channel output, in the case of multiple-channel output, if
Use wherein all the way for primary feedback, bypass is not involved in feeding back (main road voltage is higher than bypass) all the way in addition, then empty on primary feedback road
Under conditions of carrying or jumping Larger Dynamic load, and during bypass band relatively large load, primary side energy supply deficiency easily occur causes secondary side
The situation that bypass output voltage declines occurs.It is easily straight if now connecing DC/DC power models behind bypass output voltage again
Connecing causes the input undervoltage of DC/DC power models to be protected.
Common solution be exactly main road output end add fictitious load and take two-path feedback regulation two ways come
Solve the problems, such as.Solve problem according to the mode of fictitious load, then often have with load overheat, stand-by power consumption and efficiency drop
Low problem；Two-path feedback can then sacrifice the voltage accuracy of main road, and more essences can be spent typically in loop adjustment
Power.
Utility model content
Have in view of that, the technical problems to be solved in the utility model is：Multiple-channel output is used in supply convertor, and is list
During the feedback regulation of road, zero load or jump Larger Dynamic load on primary feedback road, bypass is with (main road voltage is higher than under conditions of relatively large load
Bypass), the problem of bypass output voltage shakiness.
In order to solve the above technical problems, the utility model is defeated to low-voltage in power supply secondary side output end high voltage output line
Increase a voltage crossover regulation adjustment circuit, including electrochemical capacitor C4 and diode D4 in parallel, electrolysis electricity between outlet
The tie point of the positive pole and diode D4 negative electrodes that hold C4 is connected to the high voltage output line of power supply secondary side output voltage, electrolysis electricity
Hold C4 negative pole and the tie point of the diode D4 anodes output line that to be connected to power supply secondary side output voltage low.
Principle of the present utility model is：In power supply secondary side output end high voltage Vo1 output lines to low-voltage Vo2 output lines
Between after flying capcitor C4, when bypass voltage Vo2 declines because of energy deficiency, the energy of main road can pass through this electrochemical capacitor stream
Enter bypass, and main road Vo1 voltages are then adjusted in real time by feedback, so that bypass Vo2 voltages remain stable, strengthen main road
Under the conditions of Vo1 zero loads or jump Larger Dynamic, bypass Vo2 load regulation ability, diode D4 main function is to prevent height output
When voltage Vo1 does short-circuit protection, overstate and connect electric capacity C4 damages.
It is characterized in that：Electrochemical capacitor a C4, C4 positive pole and D2 are bridged between D2 negative level and D3 negative level
Negative level be connected, C4 negative level is connected with D3 negative level, and D4 positive level is connected with C4 negative level, D4 negative level and C4 positive level phase
Even.In the main output road Vo1 zero loads of secondary side or Larger Dynamic load is jumped, and secondary side bypass output situations of the Vo2 with relatively large load
Under, when bypass energy is inadequate, causes the decline of Vo2 output voltages, main road Vo1 has part energy and flowed by electrochemical capacitor C4
To bypass, with this stable bypass Vo2 output voltage, reach the purpose for adjusting cross regulation rate.When main road Vo1 does short-circuit test
When, the voltage at electrochemical capacitor C4 both ends can prevent electric capacity C4 from damaging by D4 clampers.
This utility model is applied to various topological structures, particularly in the power supply of plurality of voltages output, main road it is unloaded or
Larger Dynamic load is jumped, and in the case of bypass band relatively large load, the improvement of cross regulation rate.
Compared with traditional solution the utility model has the advantage of：
1. need not additionally increase main road fictitious load, stand-by power consumption and efficiency can be done higher.
2. double feedback regulations need not be used, the precision of voltage regulation of main road is more preferable, and feedback control loop is easily adjusted.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of existing multiple-channel output AC/DC power supplys；
Fig. 2 is the AC/DC power circuit principle figures using the utility model voltage crossover regulation adjustment circuit.
Embodiment
Embodiment one
A kind of voltage crossover regulation adjustment circuit, including electrochemical capacitor C4 and diode D4 in parallel, electrochemical capacitor C4
The tie point of positive pole and diode D4 negative electrodes be connected to the high voltage output line of power supply secondary side output voltage, electrochemical capacitor C4
Negative pole and the tie point of diode D4 the anodes output line that to be connected to power supply secondary side output voltage low.
Fig. 2 is the AC/DC power circuit principle figures using the utility model voltage crossover regulation adjustment circuit.Including first
Level winding NP1, secondary main output winding NS1, secondary auxiliary output winding NS2 and feedback control module, main output winding voltage
Vo1 is connected to primary side by feedback module and controls PWM IC to carry out feedback control, primary side input to main output voltage Vo1
Two output winding NS1/NS2 of winding NP1 and secondary side are in opposite direction, two output winding NS1 and NS2 directions phases of secondary side
Together, and NSl>NS2, D2 are secondary main output winding NS1 commutation diode, and positive to terminate secondary main output winding NS1, negative terminal connects
Electrochemical capacitor C2 positive pole, C2 negative pole are connected with secondary side, and R2 is that main road output Vo1 load resistances .D3 is secondary auxiliary
Winding NS2 commutation diode, the positive secondary auxiliary output winding NS2 of termination are exported, negative terminal connects electrochemical capacitor C3 positive pole, C3's
Negative pole is connected with secondary side, and R3 is main road output load resistance.
The positive pole that electrochemical capacitor a C4, C4 are bridged between D2 negative level and D3 negative level is connected with D2 negative level, C4
Negative level be connected with D3 negative level, D4 positive level is connected with C4 negative level, and D4 negative level is connected with C4 positive level.In secondary side master
Export road Vo1 zero loads or jump Larger Dynamic load, and in the case of secondary side bypass output Vo2 band relatively large loads, when bypass energy
Not enough, when causing the decline of Vo2 output voltages, main road Vo1 has part energy and flows to bypass by electrochemical capacitor C4, steady with this
Determine bypass Vo2 output voltages, reach the purpose of regulation cross regulation rate.When main road Vo1 does short-circuit test, electrochemical capacitor C4 two
The voltage at end can prevent electric capacity C4 from damaging by D4 clampers.
It the above is only preferred embodiment of the present utility model, it is noted that above-mentioned preferred embodiment should not regard
To limitation of the present utility model, for those skilled in the art, not depart from essence of the present utility model
In god and scope, some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection model of the present utility model
Enclose, no longer repeated here with embodiment, the scope of protection of the utility model should be defined by claim limited range.
Claims (1)
- A kind of 1. voltage crossover regulation adjustment circuit, it is characterised in that：Described voltage crossover regulation adjustment circuit is in electricity Source secondary side output end high voltage output line includes electrochemical capacitor C4 and diode D4 in parallel between low-voltage output line, The tie point of described electrochemical capacitor C4 positive pole and described diode D4 negative electrode is connected to power supply secondary side output voltage High voltage output line, the tie point of described electrochemical capacitor C4 negative pole and described diode D4 anode are connected to power supply The low output line of secondary side output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720754061.6U CN207069931U (en) | 2017-06-27 | 2017-06-27 | A kind of voltage crossover regulation adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720754061.6U CN207069931U (en) | 2017-06-27 | 2017-06-27 | A kind of voltage crossover regulation adjustment circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207069931U true CN207069931U (en) | 2018-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720754061.6U Active CN207069931U (en) | 2017-06-27 | 2017-06-27 | A kind of voltage crossover regulation adjustment circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207069931U (en) |
Cited By (1)
| 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 |
-
2017
- 2017-06-27 CN CN201720754061.6U patent/CN207069931U/en active Active
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 |
| CN110165902B (en) * | 2019-06-17 | 2020-12-22 | 深圳创维－Rgb电子有限公司 | Power supply system and television |
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