CN102412746B - A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate - Google Patents
A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate Download PDFInfo
- Publication number
- CN102412746B CN102412746B CN201110389967.XA CN201110389967A CN102412746B CN 102412746 B CN102412746 B CN 102412746B CN 201110389967 A CN201110389967 A CN 201110389967A CN 102412746 B CN102412746 B CN 102412746B
- Authority
- CN
- China
- Prior art keywords
- resistance
- draws
- power model
- load
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000033228 biological regulation Effects 0.000 title claims abstract description 34
- 230000003750 conditioning effect Effects 0.000 claims abstract description 50
- 238000001914 filtration Methods 0.000 claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 239000004065 semiconductor Substances 0.000 claims description 29
- 238000004804 winding Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate, it comprises transformer, power model falls in the first rectification filtering module, the second rectification filtering module, feedback control loop module, standby step-down, dynamic conditioning draws and carry a power model, the first load and the second load; Transformer is connected with the first rectification filtering module and the second rectification filtering module; First rectification filtering module and the second rectification filtering module draw a year power model to be connected respectively with dynamic conditioning, power model, the first load and the second load are fallen in feedback control loop module and the second rectification filtering module, standby step-down and dynamic conditioning draws a year power model to be connected; Dynamic conditioning draws and carries power model for sampling to the voltage in the first load, and the pwm signal of corresponding duty ratio is exported according to sampled voltage, dynamic conditioning is drawn, and year power that draws of carrier unit that draws carried in power model does self-adaptative adjustment, thus well improves the intersection adjustment capability of multiple-channel output inverse-excitation type switch power-supply.
Description
Technical field
The present invention relates to switching power circuit technical field, particularly a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate.
Background technology
The intersection of drawing the method for power termination to improve that the inverse-excitation type switch power-supply of existing multiple-channel output generally adopts increase extra exports regulation.As shown in Figure 1, at present, generally adopt and connect three high-power resistances RW3, RW4, RW5 between 24V voltage output end and ground, thus the band increasing 24V output carries power, improves the intersection adjustment capability of multiple-channel output
But, above-mentioned inverse-excitation type switch power-supply circuit is owing to adding extra constant power load, greatly reduce the operating efficiency of power module, but also add the stand-by power consumption of circuit, the performance of the efficient energy-saving of heavy damage power supply product, the simultaneously above-mentioned support method that draws cannot do self-adaptative adjustment according to band state of carrying, and adjustment capability of intersecting is limited
.
In view of this, the invention provides a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art part, the object of the present invention is to provide a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate, can draw according to load voltage self adaptation and carry power, thus reduce the loss of inverse-excitation type switch power-supply circuit.
In order to achieve the above object, this invention takes following technical scheme:
Improve an inverse-excitation type switch power-supply circuit for cross regulation rate, it comprises transformer, power model falls in the first rectification filtering module, the second rectification filtering module, feedback control loop module, standby step-down, dynamic conditioning draws and carry a power model, the first load and the second load;
The Same Name of Ends of the first secondary winding of described transformer is connected with described first rectification filtering module, and the different name end of the first secondary winding of described transformer, the Same Name of Ends of second subprime winding are connected with described second rectification filtering module respectively with the different name end of second time winding;
Described first rectification filtering module draws a year power model to be connected with the second rectification filtering module respectively with described dynamic conditioning, power model is fallen in described feedback control loop module and described second rectification filtering module, standby step-down and dynamic conditioning draws a year power model to be connected, and described standby step-down is fallen power model and drawn a year power model to be connected with dynamic conditioning;
Described dynamic conditioning draws a year power model to be connected with described first load and the second load respectively, for sampling to the voltage in described first load, and the pwm signal of corresponding frequencies and corresponding duty ratio is exported according to sampled voltage, dynamic conditioning is drawn, and year power that draws of carrier unit that draws carried in power model does self-adaptative adjustment;
Described dynamic conditioning draw carry power model comprise: comparator, metal-oxide-semiconductor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and be made up of the 6th resistance, the 7th resistance, the 8th resistor coupled in parallel draw carrier unit;
The positive input of described comparator is connected with one end of described first resistance, and reverse input end is connected with one end of described 3rd resistance, and output is connected with the grid of described metal-oxide-semiconductor by described 5th resistance;
The other end of described first resistance connects the first power supply port by the second resistance, and the other end of the 3rd resistance connects the second power supply port by the 4th resistance;
The source ground of described metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor connects one end of one end of described 6th resistance, one end of the 7th resistance and the 8th resistance, and the other end and first load and first of the other end of the 6th resistance, the other end of the 7th resistance and the 8th resistance port of powering is connected;
Described comparator, for being compared by the voltage of positive input and reverse input end, exports the pwm signal of corresponding frequencies and corresponding duty ratio, makes year power that draws drawing carrier unit do self-adaptative adjustment; Wherein, when the electric current of the first load is greater than predetermined current, the pwm signal that described comparator exports is low level, turns off described metal-oxide-semiconductor; When the electric current of the first load is less than predetermined current, the pwm signal that described comparator exports is high level, makes described metal-oxide-semiconductor conducting.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described dynamic conditioning draws and carries power model and also comprise three-terminal voltage-stabilizing pipe for output reference voltage, the model of described three-terminal voltage-stabilizing pipe is TL431,1st pin of three-terminal voltage-stabilizing pipe is connected with one end of the 3rd pin of three-terminal voltage-stabilizing pipe, the 3rd resistance and one end of the 4th resistance, the 2nd pin ground connection of three-terminal voltage-stabilizing pipe.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described dynamic conditioning draws and carries a power model and also comprise the first electric capacity, and one end of described first electric capacity is connected with the 3rd pin of described three-terminal voltage-stabilizing pipe and the 4th resistance respectively, other end ground connection.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, between the output and the grid of metal-oxide-semiconductor of described comparator, be serially connected with the first diode.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described dynamic conditioning draws a year power model also to comprise the 9th resistance, and one end of described 9th resistance is connected with the grid of metal-oxide-semiconductor, other end ground connection.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described dynamic conditioning draws a year power model also to comprise the second electric capacity, and one end of described second electric capacity connects described first resistance and the second resistance, other end ground connection.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described standby step-down is fallen power model and is comprised the first triode, the second triode, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance and the second diode;
The base stage of described first triode draws a year power model to be connected by the tenth resistance respectively with one end of the 11 resistance, the collector electrode of the second triode and dynamic conditioning, the collector electrode of the first triode draws a year power model to be connected by described 13 resistance and dynamic conditioning, emitter and described feedback control loop model calling;
The base stage of described second triode is connected with PS/ON port by described 12 resistance, grounded emitter;
The other end of described 11 resistance draws a year power model to be connected by the second diode and described dynamic conditioning.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described first load is the load of 24V, and the second load is the load of 12V.
In the inverse-excitation type switch power-supply circuit of above-mentioned raising cross regulation rate, described predetermined current is 0.3A.
Compared to prior art, a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate provided by the invention, a year power model is drawn to sample to the voltage in described first load by dynamic conditioning, and the pwm signal of corresponding frequencies and corresponding duty ratio is exported according to sampled voltage, dynamic conditioning is drawn, and year power that draws of carrier unit that draws carried in power model does self-adaptative adjustment, thus well improves the intersection adjustment capability of multiple-channel output inverse-excitation type switch power-supply.Reduce the loss power drawing and carry power termination, well reduce the stand-by power consumption of product, improve the operating efficiency of inverse-excitation type switch power-supply circuit, improve the efficient energy-saving performance of product.
Accompanying drawing explanation
The circuit theory diagrams of the inverse-excitation type switch power-supply circuit that Fig. 1 provides for prior art.
Fig. 2 is the structured flowchart that the present invention improves the inverse-excitation type switch power-supply circuit of cross regulation rate.
Fig. 3 is the circuit theory diagrams that the present invention improves the inverse-excitation type switch power-supply circuit of cross regulation rate.
Fig. 4 is that the present invention improves in the inverse-excitation type switch power-supply circuit of cross regulation rate, when the second load current is 2A, when the first load current is 0.05A, and the duty ratio schematic diagram of comparator output pwm signal.
Fig. 5 is that the present invention improves in the inverse-excitation type switch power-supply circuit of cross regulation rate, when the second load current is 2A, when the first load current is 0.15A, and the duty ratio schematic diagram of comparator output pwm signal.
Embodiment
The invention provides a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate, for making object of the present invention, technical scheme and effect clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 2, the inverse-excitation type switch power-supply circuit of the raising cross regulation rate that the embodiment of the present invention provides comprises transformer TW, power model 401 falls in the first rectification filtering module 101, second rectification filtering module 201, feedback control loop module 301, standby step-down, dynamic conditioning draws and carry power model 501, first load 601 and second load 701.Wherein, described first load 601 is the load of 24V, and the second load 701 is the load of 12V.
The Same Name of Ends 11 of first secondary winding of described transformer TW is connected with described first rectification filtering module 101, and the different name end 9 of first secondary winding of described transformer TW, the Same Name of Ends 10 of second subprime winding are connected with described second rectification filtering module 201 respectively with the different name end 8 of second time winding.
Described first rectification filtering module 101 draws a year power model 501 to be connected with the second rectification filtering module 201 respectively with described dynamic conditioning, power model 401 is fallen in described feedback control loop module 301 and described second rectification filtering module 201, standby step-down and dynamic conditioning draws a year power model 501 to be connected, and described standby step-down is fallen power model 401 and drawn a year power model 501 to be connected with dynamic conditioning.
Described dynamic conditioning draws a year power model 501 to be connected with described first load 601 and the second load 701 respectively, for sampling to the voltage in described first load 601, and the pwm signal of corresponding frequencies and corresponding duty ratio is exported according to sampled voltage, dynamic conditioning is drawn, and year power that draws of carrier unit 801 that draws carried in power model 501 does self-adaptative adjustment.
See also Fig. 3, in the embodiment of the present invention, described dynamic conditioning draw carry power model 501 comprise: comparator U10B, metal-oxide-semiconductor Q3, the first resistance R3, the second resistance R23, the 3rd resistance R41, the 4th resistance R42, the 5th resistance R35 and by the 6th resistance R38, the 7th resistance R33, the 8th resistance R37 parallel connection form draw carrier unit 801.
The positive input of described comparator U10B is connected with one end of described first resistance R3, and reverse input end is connected with one end of described 3rd resistance R41, and output is connected with the grid of described metal-oxide-semiconductor Q3 by described 5th resistance R35.The source ground of described metal-oxide-semiconductor Q3, the drain electrode of metal-oxide-semiconductor connect one end of described 6th resistance R38, the 7th resistance R33 and one end of one end the 8th resistance R37, the other end of the other end of the 6th resistance R38, the other end of the 7th resistance R33 and the 8th resistance R37 and the first load 601 and first port of powering is connected.
The other end of described first resistance R3 connects the first power supply port by the second resistance R23, and the other end of the 3rd resistance R41 connects the second power supply port by the 4th resistance R42.Wherein, described first power supply port is the power port of 24V, and the second power supply port is the power port of 12V.
Described comparator U10B is used for the voltage of positive input and reverse input end to compare, and exports the pwm signal of corresponding frequencies and corresponding duty ratio, makes year power that draws drawing carrier unit 801 do self-adaptative adjustment; Wherein, when the electric current of the first load 601 is greater than predetermined current, the pwm signal that described comparator U10B exports is low level, turns off described metal-oxide-semiconductor Q3; When the electric current of the first load 601 is less than predetermined current, the pwm signal that described comparator U10B exports is high level, makes described metal-oxide-semiconductor Q3 conducting.In specific implementation process, described predetermined current is 0.3A.
In the embodiment of the present invention, described dynamic conditioning draws and carries power model 501 and also comprise three-terminal voltage-stabilizing pipe TL431 for output reference voltage and the first electric capacity C964; Described three-terminal voltage-stabilizing pipe TL431 is for providing the reference voltage of 2.5V, 1st pin of this three-terminal voltage-stabilizing pipe TL431 is connected with one end of the 3rd pin of three-terminal voltage-stabilizing pipe TL431, the 3rd resistance R41 and one end of the 4th resistance R42, the 2nd pin ground connection of three-terminal voltage-stabilizing pipe.Described first electric capacity C964 is filter capacitor, and its one end is connected with the 3rd pin of described three-terminal voltage-stabilizing pipe TL431 and the 4th resistance R42 respectively, other end ground connection.
In the specific implementation, between the output and the grid of metal-oxide-semiconductor Q3 of described comparator U10B, the first diode D19 is serially connected with.Described dynamic conditioning draws a year power model 501 also to comprise the 9th resistance R40, and one end of described 9th resistance R40 is connected with the grid of metal-oxide-semiconductor Q3, other end ground connection.
In a further embodiment, described dynamic conditioning draws a year power model 501 also to comprise the second electric capacity C34, and one end of described second electric capacity C34 connects described first resistance R3 and the second resistance R23, other end ground connection.
Please again consult Fig. 2 and Fig. 3, described standby step-down is fallen power model 401 and is comprised the first triode Q1, the second triode Q2, the tenth resistance RW13, the 11 resistance RW16, the 12 resistance RW15, the 13 resistance RW12 and the second diode D20.
The base stage of described first triode Q1 draws a year power model 501 to be connected by the tenth resistance RW13 respectively with one end of the 11 resistance RW16, the collector electrode of the second triode Q2 and dynamic conditioning, the collector electrode of the first triode Q1 draws a year power model 501 to be connected by described 13 resistance RW12 with dynamic conditioning, and emitter is connected with described feedback control loop module 301.
The base stage of described second triode Q2 is connected with PS/ON port by described 12 resistance RW15, grounded emitter; The other end of described 11 resistance RW16 draws a year power model 501 to be connected by the second diode D20 with described dynamic conditioning.
Be prior art about the function of the first rectification filtering module 101, second rectification filtering module 201 and feedback control loop module 301 and circuit structure thereof, be not described further herein.
Below in conjunction with Fig. 3, the operation principle of the inverse-excitation type switch power-supply circuit of raising cross regulation rate provided by the invention is described in detail:
In figure 3, V_sense represents the proportion divider sampled voltage that 24V load exports, V_ref is the 2.5V reference voltage that three-terminal voltage-stabilizing pipe TL431 produces, V_pwm is the drive singal of metal-oxide-semiconductor Q3, I_24V be 24V power port export operating load electric current, I_12V be 12V power port export operating load electric current.
In inverse-excitation type switch power-supply circuit, by the opto-coupled feedback in feedback control loop module 301, preferentially can only stablize the output of 12V, and the uneven degree that the output voltage of 24V load can export according to each road changes a lot.This inventive embodiments is by sampling to the voltage of 24V load, and compare with reference voltage V _ ref, export the V_pwm signal controlling metal-oxide-semiconductor Q3 of a duty ratio and changeable frequency, allow year power that draws of the 6th resistance R38, the 7th resistance R33 and the 8th resistance R37 do self-adaptative adjustment.
The duty ratio of the drive singal V_pwm that the present invention is exported by comparator U10B does self-adaptative adjustment along with the change of I_24V, and work as I_12V=2A, during I_24V=0.05A, V_pwm duty ratio as shown in Figure 4; Work as I_12V=2A, during I_24V=0.15A, V_pwm duty ratio as shown in Figure 5.
Through repeatedly testing, when I_24V is greater than 0.3A, carry power without any need for drawing, now, the 24V voltage that the first power supply port exports can be stabilized to 24V substantially, and the V_pwm that now comparator U10B exports becomes low level, turn off metal-oxide-semiconductor Q3, thus decrease loss power, improve efficiency.
In addition, in existing inverse-excitation type switch power-supply circuit, apply standby reduction voltage circuit, standby moment standby voltage can be caused to fall on the ground suddenly very low, trigger the under-voltage protection function of output equipment, thus occur the fault of standby deadlock.And the present invention is in standby moment, 24V load its standby voltage unloaded reduces by half, now the second triode Q2 by, 12V makes sampled voltage V_sense voltage be greater than 2.5V by the 11 resistance RW16 and the second diode D20, thus open metal-oxide-semiconductor Q3, make the feeder ear mouth repid discharge of 24V, the power supply port reducing rapidly 24V, to the feedback quantity of power supply chip, avoids the problem occurring that standby instant output voltage drags down rapidly.When after standby output voltage stabilization, sampled voltage V_sense is less than 2.5V, and the pwm signal that comparator U10B exports transfers low level to and automatically closes metal-oxide-semiconductor Q3, reduces the stand-by power consumption of product, improves the energy-efficient performance of power supply product.
In sum, a kind of inverse-excitation type switch power-supply circuit improving cross regulation rate provided by the invention, a year power model is drawn to sample to the voltage in described first load by dynamic conditioning, and the pwm signal of corresponding frequencies and corresponding duty ratio is exported according to sampled voltage, dynamic conditioning is drawn, and year power that draws of carrier unit that draws carried in power model does self-adaptative adjustment, thus well improves the intersection adjustment capability of multiple-channel output inverse-excitation type switch power-supply.Reduce the loss power drawing and carry power termination, well reduce the stand-by power consumption of product, improve the operating efficiency of inverse-excitation type switch power-supply circuit, improve the efficient energy-saving performance of product.
Be understandable that, for those of ordinary skills, can be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, and all these change or replace the protection range that all should belong to the claim appended by the present invention.
Claims (9)
1. one kind is improved the inverse-excitation type switch power-supply circuit of cross regulation rate, it is characterized in that, comprise transformer, power model falls in the first rectification filtering module, the second rectification filtering module, feedback control loop module, standby step-down, dynamic conditioning draws and carries a power model, the first load and the second load;
The Same Name of Ends of the first secondary winding of described transformer is connected with described first rectification filtering module, and the different name end of the first secondary winding of described transformer, the Same Name of Ends of second subprime winding are connected with described second rectification filtering module respectively with the different name end of second time winding;
Described first rectification filtering module draws a year power model to be connected with the second rectification filtering module respectively with described dynamic conditioning, power model is fallen in described feedback control loop module and described second rectification filtering module, standby step-down and dynamic conditioning draws a year power model to be connected, and described standby step-down is fallen power model and drawn a year power model to be connected with dynamic conditioning;
Described dynamic conditioning draws a year power model to be connected with described first load and the second load respectively, for sampling to the voltage in described first load, and the pwm signal of corresponding frequencies and corresponding duty ratio is exported according to sampled voltage, dynamic conditioning is drawn, and year power that draws of carrier unit that draws carried in power model does self-adaptative adjustment;
Described dynamic conditioning draw carry power model comprise: comparator, metal-oxide-semiconductor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance and be made up of the 6th resistance, the 7th resistance, the 8th resistor coupled in parallel draw carrier unit;
The positive input of described comparator is connected with one end of described first resistance, and reverse input end is connected with one end of described 3rd resistance, and output is connected with the grid of described metal-oxide-semiconductor by described 5th resistance;
The other end of described first resistance connects the first power supply port by the second resistance, and the other end of the 3rd resistance connects the second power supply port by the 4th resistance;
The source ground of described metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor connects one end of one end of described 6th resistance, one end of the 7th resistance and the 8th resistance, and the other end and first load and first of the other end of the 6th resistance, the other end of the 7th resistance and the 8th resistance port of powering is connected;
Described comparator, for being compared by the voltage of positive input and reverse input end, exports the pwm signal of corresponding frequencies and corresponding duty ratio, makes year power that draws drawing carrier unit do self-adaptative adjustment; Wherein, when the electric current of the first load is greater than predetermined current, the pwm signal that described comparator exports is low level, turns off described metal-oxide-semiconductor; When the electric current of the first load is less than predetermined current, the pwm signal that described comparator exports is high level, makes described metal-oxide-semiconductor conducting.
2. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, it is characterized in that, described dynamic conditioning draws and carries power model and also comprise three-terminal voltage-stabilizing pipe for output reference voltage, the model of described three-terminal voltage-stabilizing pipe is TL431,1st pin of three-terminal voltage-stabilizing pipe is connected with one end of the 3rd pin of three-terminal voltage-stabilizing pipe, the 3rd resistance and one end of the 4th resistance, the 2nd pin ground connection of three-terminal voltage-stabilizing pipe.
3. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 2, it is characterized in that, described dynamic conditioning draws a year power model also to comprise the first electric capacity, one end of described first electric capacity is connected with the 3rd pin of described three-terminal voltage-stabilizing pipe and the 4th resistance respectively, other end ground connection.
4. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, is characterized in that, between the output and the grid of metal-oxide-semiconductor of described comparator, be serially connected with the first diode.
5. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, is characterized in that, described dynamic conditioning draws a year power model also to comprise the 9th resistance, and one end of described 9th resistance is connected with the grid of metal-oxide-semiconductor, other end ground connection.
6. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, it is characterized in that, described dynamic conditioning draws a year power model also to comprise the second electric capacity, and one end of described second electric capacity connects described first resistance and the second resistance, other end ground connection.
7. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, it is characterized in that, described standby step-down is fallen power model and is comprised the first triode, the second triode, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance and the second diode;
The base stage of described first triode draws a year power model to be connected by the tenth resistance respectively with one end of the 11 resistance, the collector electrode of the second triode and dynamic conditioning, the collector electrode of the first triode draws a year power model to be connected by described 13 resistance and dynamic conditioning, emitter and described feedback control loop model calling;
The base stage of described second triode is connected with PS/ON port by described 12 resistance, grounded emitter;
The other end of described 11 resistance draws a year power model to be connected by the second diode and described dynamic conditioning.
8. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, is characterized in that, described first load is the load of 24V, and the second load is the load of 12V.
9. the inverse-excitation type switch power-supply circuit of raising cross regulation rate according to claim 1, is characterized in that, described predetermined current is 0.3A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110389967.XA CN102412746B (en) | 2011-11-30 | 2011-11-30 | A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110389967.XA CN102412746B (en) | 2011-11-30 | 2011-11-30 | A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102412746A CN102412746A (en) | 2012-04-11 |
| CN102412746B true CN102412746B (en) | 2015-07-29 |
Family
ID=45914652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110389967.XA Active CN102412746B (en) | 2011-11-30 | 2011-11-30 | A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102412746B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978343A (en) * | 2016-05-31 | 2016-09-28 | 阳光电源股份有限公司 | Multipath output switch power supply and inverter |
| CN109687718A (en) * | 2019-02-26 | 2019-04-26 | 珠海格力电器股份有限公司 | Flyback sourse circuit |
| CN113904567B (en) * | 2021-05-12 | 2023-11-07 | 江苏芯潭微电子有限公司 | AC-DC control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464628A (en) * | 2002-06-06 | 2003-12-31 | 伊博电源（杭州）有限公司 | Switch power supply no-load control circuit |
| CN101425745A (en) * | 2007-11-01 | 2009-05-06 | 台达电子工业股份有限公司 | Electric power supply component suitable for control circuit in electric source switch device |
| CN201805493U (en) * | 2010-09-21 | 2011-04-20 | 东莞市奥源电子科技有限公司 | Output circuit for LED (light-emitting diode) LCDTV (liquid-crystal display television) power supply |
| CN102130614A (en) * | 2011-01-11 | 2011-07-20 | 深圳创维－Rgb电子有限公司 | Multi-path output switch power supply circuit, switch power supply and device with same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006061924A1 (en) * | 2004-12-08 | 2006-06-15 | Sanken Electric Co., Ltd. | Multi-output current-resonant type dc-dc converter |
| US7272025B2 (en) * | 2005-01-18 | 2007-09-18 | Power Integrations, Inc. | Method and apparatus to control either a regulated or an unregulated output of a switching power supply |
-
2011
- 2011-11-30 CN CN201110389967.XA patent/CN102412746B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1464628A (en) * | 2002-06-06 | 2003-12-31 | 伊博电源（杭州）有限公司 | Switch power supply no-load control circuit |
| CN101425745A (en) * | 2007-11-01 | 2009-05-06 | 台达电子工业股份有限公司 | Electric power supply component suitable for control circuit in electric source switch device |
| CN201805493U (en) * | 2010-09-21 | 2011-04-20 | 东莞市奥源电子科技有限公司 | Output circuit for LED (light-emitting diode) LCDTV (liquid-crystal display television) power supply |
| CN102130614A (en) * | 2011-01-11 | 2011-07-20 | 深圳创维－Rgb电子有限公司 | Multi-path output switch power supply circuit, switch power supply and device with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102412746A (en) | 2012-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103475086B (en) | The power supply of many supply modules seamless switching | |
| CN104836446A (en) | Controlling method for isolated converter, control circuit and switching mode power supply | |
| CN107528375A (en) | A kind of accumulator charging and discharging state intelligent monitor system | |
| CN106655809A (en) | Method of reducing power consumption of power supply, power supply whose power consumption is reduced automatically and television | |
| CN203522260U (en) | Cell power-supplying control circuit and a double-power-supply power supplying device | |
| CN202190212U (en) | Overvoltage control circuit, low-power-consumption power circuit and television | |
| CN102412746B (en) | A kind of inverse-excitation type switch power-supply circuit improving cross regulation rate | |
| CN204046418U (en) | A kind of power supply power consumption control module | |
| CN201178462Y (en) | Low power consumption standby power source circuit | |
| CN202093093U (en) | Three-phase low-power rate control intelligent electricity meter based on buck mode switch power supply | |
| CN102299629A (en) | Power supply control method and power supply device for direct-current high-voltage power supply | |
| CN203368003U (en) | Dual protection device for Boost circuit | |
| CN203617878U (en) | Resonance soft switch with constant conductive time | |
| CN201252495Y (en) | Frequency-converting energy-saving device | |
| CN206331107U (en) | Power failure detection circuit of single-phase intelligent electric meter | |
| CN204442180U (en) | A kind of underloading interval puts initialization circuit | |
| CN103475074A (en) | No-load low-loss battery charging circuit | |
| CN105515357B (en) | A kind of DCDC current-limiting circuits | |
| CN201352759Y (en) | Power source device with low standby power | |
| CN204794694U (en) | Out put voltage control circuit and have power of this circuit | |
| CN201821265U (en) | Non-polar isolation reverse converter | |
| CN202694056U (en) | Automatic power-off energy saving device for household appliances | |
| CN204349801U (en) | Switching power circuit | |
| CN204886699U (en) | Pulsewidth modulation voltage stabilizing circuit with low pressure switches on high -pressure stabilized voltage characteristic | |
| CN206472045U (en) | A kind of ac/dc supply convertor applied to open switch power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |