CN202003804U - Flyback transformer and cross regulation rate circuit applied therefor - Google Patents
Flyback transformer and cross regulation rate circuit applied therefor Download PDFInfo
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- CN202003804U CN202003804U CN2010206235718U CN201020623571U CN202003804U CN 202003804 U CN202003804 U CN 202003804U CN 2010206235718 U CN2010206235718 U CN 2010206235718U CN 201020623571 U CN201020623571 U CN 201020623571U CN 202003804 U CN202003804 U CN 202003804U
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- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 230000008859 change Effects 0.000 claims description 17
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract 9
- 238000004804 winding Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012797 qualification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model provides a flyback transformer and a cross regulation rate circuit applied for the flyback transformer. The circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C2, an optical coupler (U1), an integrated chip (U2) and a control chip. The collector electrode of the optical coupler (U1) is connected with the feedback pin (FB) of the control chip and the emitter electrode of the optical coupler (U1) is connected with a primary ground. The anode of the optical coupler (U1) is connected with a main output (V1) via the resistor R1 and the cathode of the optical coupler (U1) is connected with the cathode of the integrated chip (U2). The anode of the integrated chip (U2) is connected with a secondary ground. One end of the resistor R2 is connected with the anode of the optical coupler (U1) and the other end of the optical coupler is connected with the cathode of the optical coupler (U1). The resistor R3 is serially connected with the capacitor C2. One end of the resistor R3 is connected the cathode of the optical coupler (U1) and the other end thereof is connected with the main output (V1) via the resistor R6. The reference pin of the integrated chip (U2) is connected with an auxiliary output (V2) via the resistor R7. The resistor R4 is in a parallel connection with the resistor R5. One end of the resistor R4 is grounded and the other end of the resistor R4 is connected with the reference pin of the integrated chip (U2).
Description
Technical field
The utility model relates to the anti-power technique fields that swashs, and relates in particular to a kind of anti-violent change depressor and is applied to anti-violent change depressor intersection regulation circuit.
Background technology
When in the existing anti-sharp class circuit multichannel output being arranged, basically all only allow main output feed back, other auxilliary output open loops are not fed back, and can only guarantee that like this intersection regulation of main output meets the demands, the intersection regulation of other auxilliary outputs will be very poor, may surpass the limiting value that requires.
The utility model content
The purpose of this utility model is to provide a kind of anti-violent change depressor and is applied to anti-violent change depressor intersection regulation circuit.
The utility model embodiment is achieved in that a kind of anti-violent change depressor, comprises primary coil (N); Primary coil (N) is divided into identical first coil (N1) of the number of turn and the 4th coil (N4), and second coil (N2) of the minimum output voltage number of turn, the tertiary coil (N3) of the high output number of turn and the 5th coil (N5) of elementary auxiliary umber of turn; With described first to the 5th coil according to one deck in around first coil (N1), second coil (N2) and tertiary coil (N3) are parallel around the second layer, the 3rd layer around the 4th coil (N4), the 4th layer around the 5th coil (N5).
A kind ofly be applied to anti-violent change depressor and intersect the regulation circuit, comprising: resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 2, optocoupler (U1), integrated chip (U2) and control chip; The collector electrode of optocoupler (U1) connects the feedback pin (FB) of control chip, its emitter connects elementary ground, the anode of optocoupler (U1) connects main output (V1) through resistance R 1, and the negative electrode of optocoupler (U1) links to each other with the negative electrode of integrated chip (U2), and the anode of integrated chip (U2) connects secondary ground; Resistance R 2 one terminates at the anode of optocoupler (U1), and the other end links to each other with optocoupler (U1) negative electrode; The negative electrode of a termination optocoupler (U1) after resistance R 3 is connected with capacitor C 2, the other end connects main output (V1) through resistance R 6; The reference pin of integrated chip (U2) connects auxilliary output (V2) through resistance R 7; Resistance R 4 and one terminates secondary ground, resistance R 5 back in parallel, the reference pin of another termination integrated chip (U2).
Wherein, also comprise capacitor C 1, described capacitor C 1 is connected in parallel on the resistance R 3 and capacitor C 2 two ends that is in series.
Wherein, the reference pin of described integrated chip (U2) also connects main output (V1) through resistance R 6.
The utility model embodiment compared with prior art, beneficial effect is: the utility model is by changing the transformer coil winding, and feedback line adopted with main be output as main feedback, other are output as the circuit of auxiliary feedback, by control chip feedback pin, regulate output voltage, thereby can be under the maximum load and minimum load situation of regulation, main output can be controlled in 5%, and auxilliary output can be controlled in 10%, improves anti-violent change depressor intersection regulation.
Description of drawings
Fig. 1 is the anti-violent change depressor of a utility model structural representation;
Fig. 2 is the anti-violent change depressor intersection of a utility model regulation circuit diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also shown in Figure 1ly, at first determine elementary number of turns N, N is divided into the N1 and the N4 of the identical number of turn, confirm the number of turn N2 of minimum input voltage again, confirm the number of turn N3 of high output then, calculate the number of turn N5 of elementary auxiliary winding at last at anti-violent change depressor.Begin coiling then, the inside one deck is around N1, then with N2 and N3 side by side with around the second layer again, then around N4, outermost one deck is around auxiliary winding N5.
See also shown in Figure 2, comprise resistance R 1, R2, R3, R4, R5, R6, R7, capacitor C 1, C2, optocoupler U1, integrated chip (TL431) U2, control chip, the collector electrode of optocoupler U1 meet the feedback pin FB of control chip, its grounded emitter, the anode of optocoupler U1 meets main output V1 through resistance R 1, and the negative electrode of optocoupler U1 links to each other with the negative electrode of integrated chip U2, the plus earth of integrated chip U2; Resistance R 2 one terminates at the anode of optocoupler U1, and the other end links to each other with optocoupler U1 negative electrode; Resistance R 3 is with in parallel with capacitor C 1 again after capacitor C 2 is connected, the negative electrode of the termination optocoupler U1 after its parallel connection, and the other end meets main output V1 through resistance R 6; The reference pin of TL431U2 meets auxilliary output V2 through resistance R 7; Resistance R 4 and resistance R 5 backs in parallel one end ground connection, the reference pin of another termination TL431U2; The reference pin of integrated chip U2 also links to each other with an end of capacitor C 1.
Operation principle: optocoupler mainly is to provide a feedback signal for elementary, when output loading changes, elementary control chip is adjusted operating state so that reach secondary desired power according to the variation of feedback pin FB, wherein R1 and R3 are used for controlling the optocoupler secondary current, the feedback control loop response speed, R3 and C2 are used for adjusting gain around feedback and phase margin, TL431 is used for adjusting output voltage amplitude, 2.5V just starts working and this maintains 2.5V with reference to pin always because when the reference pin of TL431 reaches, like this by adjusting R4, R5, the voltage that R6, R7 just can obtain wanting.
The utility model is by changing the transformer coil winding, and feedback line adopted with main be output as main feedback, other are output as the circuit of auxiliary feedback, by control chip feedback pin, regulate output voltage, thus can be under the maximum load and minimum load situation of regulation, and main output can be controlled in 5%, auxilliary output can be controlled in 10%, improves anti-violent change depressor intersection regulation.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. an anti-violent change depressor comprises primary coil (N); It is characterized in that, primary coil (N) is divided into identical first coil (N1) of the number of turn and the 4th coil (N4), and second coil (N2) of the minimum output voltage number of turn, the tertiary coil (N3) of the high output number of turn and the 5th coil (N5) of elementary auxiliary umber of turn; With described first to the 5th coil according to one deck in around first coil (N1), second coil (N2) and tertiary coil (N3) are parallel around the second layer, the 3rd layer around the 4th coil (N4), the 4th layer around the 5th coil (N5).
2. one kind is applied to anti-violent change depressor intersection regulation circuit, it is characterized in that, comprising: resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7, capacitor C 2, optocoupler (U1), integrated chip (U2) and control chip; The collector electrode of optocoupler (U1) connects the feedback pin (FB) of control chip, its emitter connects elementary ground, the anode of optocoupler (U1) connects main output (V1) through resistance R 1, and the negative electrode of optocoupler (U1) links to each other with the negative electrode of integrated chip (U2), and the anode of integrated chip (U2) connects secondary ground; Resistance R 2 one terminates at the anode of optocoupler (U1), and the other end links to each other with optocoupler (U1) negative electrode; The negative electrode of a termination optocoupler (U1) after resistance R 3 is connected with capacitor C 2, the other end connects main output (V1) through resistance R 6; The reference pin of integrated chip (U2) connects auxilliary output (V2) through resistance R 7; Resistance R 4 and one terminates secondary ground, resistance R 5 back in parallel, the reference pin of another termination integrated chip (U2).
3. as claimed in claim 2ly be applied to anti-violent change depressor and intersect the regulation circuit, it is characterized in that also comprise capacitor C 1, described capacitor C 1 is connected in parallel on the resistance R 3 and capacitor C 2 two ends that is in series.
4. as claimed in claim 2ly be applied to anti-violent change depressor and intersect the regulation circuit, it is characterized in that the reference pin of described integrated chip (U2) also connects main output (V1) through resistance R 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206235718U CN202003804U (en) | 2010-11-24 | 2010-11-24 | Flyback transformer and cross regulation rate circuit applied therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206235718U CN202003804U (en) | 2010-11-24 | 2010-11-24 | Flyback transformer and cross regulation rate circuit applied therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202003804U true CN202003804U (en) | 2011-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206235718U Expired - Fee Related CN202003804U (en) | 2010-11-24 | 2010-11-24 | Flyback transformer and cross regulation rate circuit applied therefor |
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| Country | Link |
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| CN (1) | CN202003804U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420525A (en) * | 2011-12-15 | 2012-04-18 | 南京亚派科技实业有限公司 | Circuit for improving multi-path output cross regulation rate of switching power supply |
| CN104638998A (en) * | 2014-12-24 | 2015-05-20 | 上海瑞伯德智能系统科技有限公司 | Method for regulating cross regulation rate of multi-path output converter |
| CN104900393A (en) * | 2015-05-21 | 2015-09-09 | 广州金升阳科技有限公司 | Winding method and product for flyback transformer |
-
2010
- 2010-11-24 CN CN2010206235718U patent/CN202003804U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420525A (en) * | 2011-12-15 | 2012-04-18 | 南京亚派科技实业有限公司 | Circuit for improving multi-path output cross regulation rate of switching power supply |
| CN104638998A (en) * | 2014-12-24 | 2015-05-20 | 上海瑞伯德智能系统科技有限公司 | Method for regulating cross regulation rate of multi-path output converter |
| CN104638998B (en) * | 2014-12-24 | 2017-01-18 | 上海瑞伯德智能系统科技有限公司 | Method for regulating cross regulation rate of multi-path output converter |
| CN104900393A (en) * | 2015-05-21 | 2015-09-09 | 广州金升阳科技有限公司 | Winding method and product for flyback transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20121124 |