CN102570798A - Method for realizing constant voltage-second product auxiliary power supply in forward switching power supply and circuit - Google Patents
Method for realizing constant voltage-second product auxiliary power supply in forward switching power supply and circuit Download PDFInfo
- Publication number
- CN102570798A CN102570798A CN2010106163019A CN201010616301A CN102570798A CN 102570798 A CN102570798 A CN 102570798A CN 2010106163019 A CN2010106163019 A CN 2010106163019A CN 201010616301 A CN201010616301 A CN 201010616301A CN 102570798 A CN102570798 A CN 102570798A
- Authority
- CN
- China
- Prior art keywords
- triode
- power supply
- circuit
- diode
- filter inductance
- 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.)
- Granted
Links
Images
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a method for realizing a constant voltage-second product auxiliary power supply in a forward switching power supply. The auxiliary power supply circuit is provided with an input interface, a chopper circuit having constant voltage-second product functions, a filter inductor L1 and an output interface; the input interface is connected to an auxiliary winding of a forward transformer in the forward switching power supply; and an input power supply is output to the filter inductor L1 after chopping by the chopper circuit, and the input power supply is output to the forward switching power supply to control the chip to supply power after filtering by the filter inductor L1. Correspondingly, the invention further discloses a circuit of the constant voltage-second product auxiliary power supply in the forward switching power supply; and as the input power supply of the auxiliary power supply is from the auxiliary winding of the forward transformer without additional transformer, the volume and cost of the auxiliary power supply can be greatly reduced. In the invention, the constant voltage-second product chopper circuit is realized by RC (Remote Control) charging and discharging, so that the automatic voltage regulation is stabilized without feedback; and the circuit is simple and reliable.
Description
Technical field
The present invention discloses a kind of accessory power supply of Switching Power Supply, particularly a kind of method and corresponding constant voltagesecond product auxiliary power circuit of positive exciting switching voltage regulator of in positive exciting switching voltage regulator, realizing constant voltagesecond product accessory power supply.
Background technology
Switching Power Supply is widely used in the various electric equipment products with its energy-saving and environmental protection, advantage such as efficient already, and wherein the normal shock application of switching power of power output between 100W-500W is the most extensive.At present, all comprise an accessory power supply in the general Switching Power Supply usually, be used for components and parts power supply, shortcomings such as the auxiliary power supply circuit ubiquity structure in the present positive exciting switching voltage regulator is too complicated, volume is big, cost height to Switching Power Supply inside.Usually all include an output filter circuit in the present positive exciting switching voltage regulator, please referring to accompanying drawing 1, shown in the accompanying drawing 1 is in the prior art, the output filter circuit that often adopts in the positive exciting switching voltage regulator.All include a filter inductance in the output filter circuit, still, because the electric current of the control circuit in the Switching Power Supply generally has only tens milliamperes; If can both work in order to satisfy wide voltage input, then need do the inductance value of inductance very big, like this; On the one hand big inductance implements the comparison difficulty; On the other hand, big filter inductance can cause Switching Power Supply at Qi Jishi, and it is slower to start the electric capacity charging; Switching Power Supply is had the hiccups easily, and the scheme of the common inapplicable inductor filter of auxiliary electric power supply in the positive exciting switching voltage regulator of therefore wide busbar voltage input is come the control circuit power supply to Switching Power Supply inside.Therefore, positive exciting switching voltage regulator of the prior art normally designs auxiliary electric power supply separately.Accessory power supply in the present positive exciting switching voltage regulator generally all is to adopt small-power instead to swash power supply topologies; Please referring to accompanying drawing 2; Accessory power supply is formed and is comprised independent control chip and feedback control loop, transformer, switching tube and rectifying part, is equivalent to the complete power supply of a cover, its complex structure; Not only cost is higher, and volume is big.Also have a kind of accessory power supply commonly used just to be to use linear voltage-stabilizing circuit to make accessory power supply at present; Please referring to accompanying drawing 3; Utilize the auxiliary winding voltage of normal shock transformer to insert in the linear voltage-stabilizing circuit, through output+15V burning voltage after the triode Q2 step-down from the IN node.But this type circuit can only use in the narrow positive exciting switching voltage regulator of input voltage usually, and when it was applied in the positive exciting switching voltage regulator of wide input voltage, its efficient was very low, and caloric value is big.
Summary of the invention
To shortcoming such as the above-mentioned Switching Power Supply voltage regulation result of mentioning of the prior art is bad; The present invention provides a kind of new constant voltagesecond product accessory power supply of positive exciting switching voltage regulator; It is through the constant voltagesecond product that is added on the inductance of the chopper circuit with constant voltagesecond product function; Realize that output voltage can obtain to a certain degree stable, circuit is simple, realize easily, cost is low, volume is little, efficient is high.
The technical scheme that the present invention solves its technical problem employing is: a kind of method that in positive exciting switching voltage regulator, realizes constant voltagesecond product accessory power supply; Method is provided with input interface, has the chopper circuit of constant voltagesecond product function, filter inductance L1 and output interface in auxiliary power circuit; Input interface is connected on the auxiliary winding of the normal shock transformer in the positive exciting switching voltage regulator; Be used for the power supply input; The input power supply is exported to filter inductance L1 after chopper circuit copped wave, after filter inductance L1 filtering, export to positive exciting switching voltage regulator control chip power supply by output interface; Chopper circuit can reduce to be added in the voltagesecond product on the filter inductance L1, thereby reduces the sensibility reciprocal of filter inductance L1.
The constant voltagesecond product auxiliary power circuit of a kind of positive exciting switching voltage regulator; This circuit comprises input interface, has the chopper circuit of constant voltagesecond product function, filter inductance L1 and output interface; Said input interface is connected on the auxiliary winding of the normal shock transformer in the positive exciting switching voltage regulator, is used for the power supply input, and the input power supply is exported to filter inductance L1 after chopper circuit copped wave; After filter inductance L1 filtering, export to positive exciting switching voltage regulator control chip power supply by output interface
The technical scheme that the present invention solves its technical problem employing further comprises:
Described chopper circuit with constant voltagesecond product function comprises the control channel of power channel and control power channel break-make, and power channel is connected between input interface and the filter inductance L1, the break-make of control channel control power channel.
Described power channel comprises diode D1, triode Q4 and the diode D3 that is connected in series successively; Diode D1 is anodal to be connected with input interface; Diode D1 negative pole is connected with the positive pole of diode D3 through the ce utmost point of triode Q4; The negative pole of diode D3 is connected with filter inductance L1, the break-make of said control channel control triode Q4.
Described control channel comprises the capacitor C that is connected in series 5 and resistance R 15 and diode D2, triode Q3; Capacitor C 5 one ends are connected with input interface, and the other end is connected with resistance R 15, and resistance R 15 1 ends are connected with capacitor C 5; The other end is connected with output interface; Diode D2 and capacitor C 5 are connected in parallel, and the negative pole of diode D2 is connected with input interface, and the positive pole of diode D2 is connected on the common port of capacitor C 5 and resistance R 15; The be utmost point of triode Q3 is connected in parallel on the two ends of capacitor C 5, the break-make of the collector electrode control power channel of triode Q3.
The collector electrode of described triode Q3 is connected on the output interface through resistance R 11, and the control end of power channel is connected on the common port of triode Q3 and resistance R 11.
Also include triode Q2 in the described control channel; The collector electrode of triode Q3 is connected with the base stage of triode Q2; The break-make of triode Q3 control triode Q2; The collector electrode of triode Q2 is connected with the common port of diode D3 with triode Q4, and the emitter of triode Q2 is connected with the base stage of triode Q4, the break-make of triode Q2 control triode Q4.
Also comprise electric capacity of voltage regulation C31 in the described circuit, electric capacity of voltage regulation C31 is serially connected between output interface and the ground.
Also comprise sustained diode 7 in the described circuit, sustained diode 7 is connected between the common port and ground of diode D3 and inductance L 1.
Be serially connected with voltage stabilizing didoe Z5 between described output interface and the ground.
The invention has the beneficial effects as follows: the accessory power supply institute energy requirement among the present invention does not need extra transformer from the auxiliary winding of normal shock transformer, reduces volume and accessory power supply cost greatly.The present invention comes the constant voltagesecond product that is added on the inductance through RC charging, and control procedure do not need feedback, and circuit is simple and reliable.Voltagesecond product is constant, and voltage can obtain to a certain degree stable.The present invention can satisfy the auxiliary power supply requirement that wide voltage is exported positive exciting switching voltage regulator, and circuit is simple, realization is easy, cost is low, volume is little, efficient is high.
To combine accompanying drawing and embodiment that the present invention is further specified below.
Description of drawings
Fig. 1 is a positive exciting switching voltage regulator filtering output circuit schematic diagram in the prior art.
Fig. 2 is that the small-power in the positive exciting switching voltage regulator instead swashs the power supply topologies circuit theory diagrams in the prior art.
Fig. 3 is the linear voltage-stabilizing circuit schematic diagram in the positive exciting switching voltage regulator in the prior art.
Fig. 4 is circuit theory diagrams of the present invention.
Fig. 5 is for adopting simplification double tube positive exciting switching power circuit schematic diagram of the present invention.
Fig. 6 is the local circuit schematic diagram of Fig. 5.
Embodiment
Present embodiment is the preferred embodiment for the present invention, and other all its principles are identical with present embodiment or approximate with basic structure, all within protection range of the present invention.
The present invention is mainly a kind of method that in positive exciting switching voltage regulator, realizes constant voltagesecond product accessory power supply; The chopper circuit, filter inductance L1 and the output interface that in auxiliary power circuit, are provided with input interface, have constant voltagesecond product function; Input interface is connected on the auxiliary winding of the normal shock transformer in the positive exciting switching voltage regulator, is used for the power supply input, and the input power supply is exported to filter inductance L1 after chopper circuit copped wave; After filter inductance L1 filtering; Export to positive exciting switching voltage regulator control chip power supply by output interface, chopper circuit can reduce to be added in the voltagesecond product on the filter inductance L1, thereby reduces the sensibility reciprocal of filter inductance L1.In the present embodiment, input interface is connected on the auxiliary winding of the switch forward transformer in the positive exciting switching voltage regulator, from the auxiliary winding power taking of normal shock transformer, does not need extra transformer, reduces volume and accessory power supply cost greatly.The present invention forms secondary copped wave with the normal shock transformer, and the chopper circuit with constant voltagesecond product function is adopted in the copped wave second time, and it cooperates filter inductance L1, realizes the stable of output voltage, satisfies the auxiliary power supply requirement that wide voltage is exported positive exciting switching voltage regulator.
A kind of circuit of realizing said method also is provided among the present invention, and the constant voltagesecond product auxiliary power circuit of promptly a kind of positive exciting switching voltage regulator is please referring to accompanying drawing 4; The present invention mainly comprises input interface UIN, has the chopper circuit of constant voltagesecond product function, filter inductance L1 and output interface VCC15V, and the input power supply of input interface UIN is exported to the chopper circuit with constant voltagesecond product function, in the present embodiment; Chopper circuit with constant voltagesecond product function comprises power channel and control channel, and in the present embodiment, the input power supply of input interface UIN is divided into two-way; One the tunnel is connected with power channel, and another road is connected with control channel, and power channel output is connected with filter inductance L1; Through filter inductance L1 out-put supply,, give the power supply of ortho-exciting electric source control chip through output interface VCC15V output+15V power supply; In the present embodiment, power channel adopts triode Q4, and triode Q4 adopts the positive-negative-positive triode; The emitter of triode Q4 is connected on the input interface UIN through diode D1; The collector electrode of triode Q4 is connected with filter inductance L1 through diode D3, and the filter inductance L1 other end is connected on the output interface VCC15V, in the present embodiment; Be connected with electric capacity of voltage regulation C31 between output interface VCC15V and the ground; Can realize that through voltage of voltage regulation capacitor C 31 out-put supply is more stable, be connected with sustained diode 7 between the common port of diode D3 and filter inductance L1 and the ground, can be through sustained diode 7 electric weight in the filter inductance L1 of releasing.Capacitor C 5 one ends are connected with input interface UIN, and the other end is connected with resistance R 15, and resistance R 15 1 ends are connected with capacitor C 5, and the other end is connected with output interface VCC15V.In the present embodiment, be connected in parallel to diode D2 with capacitor C 5, the common port of capacitor C 5 and resistance R 15 is connected with the base stage of triode Q3; In the present embodiment, triode Q3 adopts the positive-negative-positive triode, and the emitter of triode Q3 is connected on the input interface UIN; The collector electrode of triode Q3 is connected with resistance R 11, and resistance R 11 other ends are connected on the output interface VCC15V, is connected with the base stage of triode Q2 on the common port of triode Q3 and resistance R 11; In the present embodiment; Triode Q2 adopts the positive-negative-positive triode, and the emitter of triode Q2 is connected on the base stage of triode Q4, and the collector electrode of triode Q2 is connected the common port place of triode Q4 and diode D3.Triode Q2 and triode Q4 form typical Darlington transistor structure, through triode Q2 the output signal of triode Q3 amplified, thus the break-make of control triode Q4.In the present embodiment, be connected with voltage-stabiliser tube Z5 between output interface VCC15V and the ground, in the present embodiment, voltage-stabiliser tube Z5 adopts the 16V voltage-stabiliser tube, to prevent that output interface VCC15V output voltage is too high the normal shock power supply control chip is caused damage.Among the present invention, output interface VCC15V place also is connected with the startup power supply, and promptly output interface VCC15V place is connected on the DC power supply VDC through starting resistance R31 and the resistance R 39 that is connected in series, and starts the present invention through DC power supply VDC.
Please referring to accompanying drawing 5 and accompanying drawing 6; Apply the present invention in the typical simplification double tube positive exciting switching power circuit of prior art; Input interface UIN among the present invention is connected on the auxiliary winding of normal shock transformer, and power taking is supplied power to the present invention from the auxiliary winding of normal shock transformer.
Operation principle of the present invention is following; When switching tube Q1-A and switching tube Q1-B opened, the 1st, 3 pin of the primary coil of main transformer TR2 added positive voltage, and this moment is 4 pin of main transformer TR2 then; Be UIN network output positive voltage, input interface UIN input positive voltage promptly of the present invention; When switching tube Q1-A and switching tube Q1-B disconnection; Because the exciting current effect of the primary coil of main transformer TR2; The 1st, 3 pin at the primary coil of main transformer TR2 produce negative voltage, i.e. UIN network output negative voltage, input interface UIN input negative voltage promptly of the present invention.
Please referring to accompanying drawing 5 and accompanying drawing 6, the present invention is a circuit in the frame of broken lines, because UIN network output voltage is a square-wave voltage, in the present embodiment, special positive peak with UIN network output voltage is defined as U
In, capacitor C 31 voltages are defined as U
Out, capacitor C 5 voltages are defined as U
C5Triode Q4_2 pin (being collector electrode) voltage is defined as U
Q4_2The resistance of resistance R 15 is R
15, the capacitance of capacitor C 5 is C
5, diode D2 conducting voltage is U
f=0.6V, the be utmost point conducting voltage U of triode Q3
Q3be=0.6v.
The course of work of the present invention is following:
1, when main switch Q1-A and switching tube Q1-B have just opened, this moment, capacitor C 5 voltage were approximately-0.6v, and triode Q3 is in off state, and triode Q2, triode Q4 are in conducting state, this moment triode Q4_2 pin voltage U
Q4_2Voltage is high, and the electrorheological in the inductance L 1 is big, inductance L 1 stored energy;
2, along with 5 chargings of 15 pairs of capacitor C of resistance R, capacitor C 5 voltage raise gradually, because the clamping action of diode D2; The voltage of capacitor C 5 changes between the 0.6v at-0.6v; Owing to be added in voltage on the resistance R 15 much larger than the voltage of capacitor C 5, so charging current can be thought I
C5=(U
In-U
Out)/R
15
3, when the voltage of capacitor C 5 reached the be knot conducting voltage of triode Q3, triode Q3 conducting, triode Q3 conducting meeting caused triode Q2, triode Q4 to turn-off, and at this moment, inductance L 1 begins to release energy through diode D7 afterflow.
Among the present invention,, export a metastable voltage through the charging and discharging constantly of inductance L 1.
Constant voltagesecond product principle realizes deriving:
In order to simplify derivation formula, in the present embodiment, regard diode D1, triode Q4, diode D3 and diode D7 as desirable device, promptly there is not the pressure drop loss.
Can know that by top derivation the charging current of capacitor C 5 is I
C5=(U
In-U
Out)/R
15
Then the triode Q3 time span of closing is: T
1=U
DET_C5* C
5/ I
CS=U
DET_C5* C
5* R
15/ (U
In-U
Out);
Wherein, U
DET_C5Be capacitor C 5 voltage varieties, i.e. the knot pressure drop of diode D2 conducting adds the be utmost point conduction voltage drop of triode Q3, U
DET_C5Be about 1.2V.
T1 in the time period triode Q4 be open mode, the voltagesecond product that then is added on the inductance L 1 is:
UT＝(U
in-U
out)*T
1＝(U
in-U
out)*U
DET_C5*C
5*R
15/(U
in-U
out)＝U
DET_C5*C
5*R
15
Analyzing following formula can get: UT=U
DET_C5* C
5* R
15, with the independent from voltage of input and output, so realized constant voltagesecond product control.
Constant voltagesecond product principle of stabilized voltage:
Order: K=U
DET_C5* C
5* R
15, analysis can get its value and be constant; UT=K then;
The energy E of inductance L 1 each output
L=0.5*L
1* I
p 2=0.5*K
2/ L
1
So, accessory power supply power output P
Out=F
Sw* E
L=0.5*F
Sw* K
2/ L
1
And for the ortho-exciting electric source of appointment, its control circuit power P
CtrlBasically constant, so as long as design K, L value, just can voltage stabilizing.
Computational methods:
The K value is chosen and can be selected according to Switching Power Supply minimum duty cycle (Dmin) in the following formula, makes T1 less than Dmin*T
SwT wherein
SwBe switch periods.
After configuring the K value, P
Ctrl=F
Sw* E
L=0.5*F
Sw* K
2/ L
1Solve an equation and to obtain L
1Value.Designed circuit just can be stablized accessory power supply voltage like this.
Accessory power supply institute energy requirement among the present invention does not need extra transformer from the auxiliary winding of normal shock transformer, reduces volume and accessory power supply cost greatly.The present invention discharges and recharges through RC and realizes constant voltagesecond product chopper circuit, realizing the constant voltagesecond product that is added on the inductance, can be under no feedback automatic voltage regulation, circuit is simple and reliable.Voltagesecond product is constant, and voltage can obtain to a certain degree stable.The present invention can satisfy the auxiliary power supply requirement that wide voltage is exported positive exciting switching voltage regulator, and circuit is simple, realization is easy, cost is low, volume is little, efficient is high.
Claims (10)
1. method that in positive exciting switching voltage regulator, realizes constant voltagesecond product accessory power supply; It is characterized in that: described method is provided with input interface, has the chopper circuit of constant voltagesecond product function, filter inductance L1 and output interface in auxiliary power circuit; Input interface is connected on the auxiliary winding of the normal shock transformer in the positive exciting switching voltage regulator, is used for the power supply input, and the input power supply is exported to filter inductance L1 after chopper circuit copped wave; After filter inductance L1 filtering; Export to positive exciting switching voltage regulator control chip power supply by output interface, chopper circuit can reduce to be added in the voltagesecond product on the filter inductance L1, thereby reduces the sensibility reciprocal of filter inductance L1.
2. constant voltagesecond product auxiliary power circuit of positive exciting switching voltage regulator; It is characterized in that: described circuit comprises input interface, has the chopper circuit of constant voltagesecond product function, filter inductance L1 and output interface; Said input interface is connected on the auxiliary winding of the normal shock transformer in the positive exciting switching voltage regulator, is used for the power supply input, and the input power supply is exported to filter inductance L1 after chopper circuit copped wave; After filter inductance L1 filtering, export to positive exciting switching voltage regulator control chip power supply by output interface.
3. circuit according to claim 2; It is characterized in that: described chopper circuit with constant voltagesecond product function comprises the control channel of power channel and control power channel break-make; Power channel is connected between input interface and the filter inductance L1, the break-make of control channel control power channel.
4. circuit according to claim 3; It is characterized in that: described power channel comprises diode D1, triode Q4 and the diode D3 that is connected in series successively; Diode D1 is anodal to be connected with input interface; Diode D1 negative pole is connected with the positive pole of diode D3 through the ce utmost point of triode Q4, and the negative pole of diode D3 is connected with filter inductance L1, the break-make of said control channel control triode Q4.
5. according to claim 3 or 4 described circuit, it is characterized in that: described control channel comprises the capacitor C that is connected in series 5 and resistance R 15 and diode D2, triode Q3, and capacitor C 5 one ends are connected with input interface; The other end is connected with resistance R 15; Resistance R 15 1 ends are connected with capacitor C 5, and the other end is connected with output interface, and diode D2 and capacitor C 5 are connected in parallel; The negative pole of diode D2 is connected with input interface; The positive pole of diode D2 is connected on the common port of capacitor C 5 and resistance R 15, and the be utmost point of triode Q3 is connected in parallel on the two ends of capacitor C 5, the break-make of the collector electrode control power channel of triode Q3.
6. circuit according to claim 5 is characterized in that: the collector electrode of described triode Q3 is connected on the output interface through resistance R 11, and the control end of power channel is connected on the common port of triode Q3 and resistance R 11.
7. circuit according to claim 5; It is characterized in that: also include triode Q2 in the described control channel; The collector electrode of triode Q3 is connected with the base stage of triode Q2, the break-make of triode Q3 control triode Q2, and the collector electrode of triode Q2 is connected with the common port of diode D3 with triode Q4; The emitter of triode Q2 is connected with the base stage of triode Q4, the break-make of triode Q2 control triode Q4.
8. according to claim 2 or 3 or 4 or 6 or 7 described circuit, it is characterized in that: also comprise electric capacity of voltage regulation C31 in the described circuit, electric capacity of voltage regulation C31 is serially connected between output interface and the ground.
9. according to claim 2 or 3 or 4 or 6 or 7 described circuit, it is characterized in that: comprise also in the described circuit that sustained diode 7, sustained diode 7 are connected between the common port and ground of diode D3 and inductance L 1.
10. according to claim 2 or 3 or 4 or 6 or 7 described circuit, it is characterized in that: be serially connected with voltage stabilizing didoe Z5 between described output interface and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010616301.9A CN102570798B (en) | 2010-12-30 | 2010-12-30 | Method for realizing constant voltage-second product auxiliary power supply in forward switching power supply and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010616301.9A CN102570798B (en) | 2010-12-30 | 2010-12-30 | Method for realizing constant voltage-second product auxiliary power supply in forward switching power supply and circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102570798A true CN102570798A (en) | 2012-07-11 |
| CN102570798B CN102570798B (en) | 2014-06-11 |
Family
ID=46415450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010616301.9A Active CN102570798B (en) | 2010-12-30 | 2010-12-30 | Method for realizing constant voltage-second product auxiliary power supply in forward switching power supply and circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102570798B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887971A (en) * | 2012-12-21 | 2014-06-25 | 德州仪器公司 | Volt-second Integration Cable Compensation Circuit |
| CN104953803A (en) * | 2015-07-06 | 2015-09-30 | 中国海洋石油总公司 | Power supply for ultrasonic phased array well wall imaging system |
| CN106877675A (en) * | 2017-03-30 | 2017-06-20 | 北京精密机电控制设备研究所 | A kind of normal shock switching power circuit two-tube in parallel of wide range input |
| WO2018196654A1 (en) * | 2017-04-27 | 2018-11-01 | Tridonic Gmbh & Co Kg | Ripple suppression circuit |
| CN109980901A (en) * | 2019-03-05 | 2019-07-05 | 合肥华耀电子工业有限公司 | A kind of auxiliary power supply circuit of wide input range power module |
| CN109995252A (en) * | 2019-04-22 | 2019-07-09 | 合肥惠科金扬科技有限公司 | A kind of voltage regulator circuit and switching power circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005210768A (en) * | 2004-01-20 | 2005-08-04 | Asahi Matsushita Electric Works Ltd | Switching power supply circuit |
| CN101222181A (en) * | 2008-01-02 | 2008-07-16 | 中兴通讯股份有限公司 | Volt-second control circuit |
| JP4548484B2 (en) * | 2006-02-09 | 2010-09-22 | 株式会社村田製作所 | Synchronous rectification forward converter |
-
2010
- 2010-12-30 CN CN201010616301.9A patent/CN102570798B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005210768A (en) * | 2004-01-20 | 2005-08-04 | Asahi Matsushita Electric Works Ltd | Switching power supply circuit |
| JP4548484B2 (en) * | 2006-02-09 | 2010-09-22 | 株式会社村田製作所 | Synchronous rectification forward converter |
| CN101222181A (en) * | 2008-01-02 | 2008-07-16 | 中兴通讯股份有限公司 | Volt-second control circuit |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103887971A (en) * | 2012-12-21 | 2014-06-25 | 德州仪器公司 | Volt-second Integration Cable Compensation Circuit |
| CN103887971B (en) * | 2012-12-21 | 2018-02-27 | 德州仪器公司 | Weber integrates cable compensation circuit and its Application way |
| CN104953803A (en) * | 2015-07-06 | 2015-09-30 | 中国海洋石油总公司 | Power supply for ultrasonic phased array well wall imaging system |
| CN104953803B (en) * | 2015-07-06 | 2018-04-17 | 中国海洋石油总公司 | Ultrasonic phase array borehole wall imaging system power supply |
| CN106877675A (en) * | 2017-03-30 | 2017-06-20 | 北京精密机电控制设备研究所 | A kind of normal shock switching power circuit two-tube in parallel of wide range input |
| WO2018196654A1 (en) * | 2017-04-27 | 2018-11-01 | Tridonic Gmbh & Co Kg | Ripple suppression circuit |
| CN109980901A (en) * | 2019-03-05 | 2019-07-05 | 合肥华耀电子工业有限公司 | A kind of auxiliary power supply circuit of wide input range power module |
| CN109980901B (en) * | 2019-03-05 | 2021-06-15 | 合肥华耀电子工业有限公司 | Auxiliary power supply circuit of wide input range power module |
| CN109995252A (en) * | 2019-04-22 | 2019-07-09 | 合肥惠科金扬科技有限公司 | A kind of voltage regulator circuit and switching power circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102570798B (en) | 2014-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104410252B (en) | Source electrode drive circuit and its control method | |
| CN100438296C (en) | DC-DC converter | |
| CN102570798B (en) | Method for realizing constant voltage-second product auxiliary power supply in forward switching power supply and circuit | |
| CN201388313Y (en) | High-efficiency constant-current LED driving circuit | |
| CN101572974A (en) | High efficiency constant current LED drive circuit and drive method | |
| CN112165252B (en) | Narrow pulse control-based bootstrap drive circuit of BUCK converter | |
| CN108541123A (en) | A kind of single live wire power getting switch | |
| CN103269161B (en) | Constant-current output BUCK power circuit | |
| CN113746328A (en) | Power-down holding circuit and control method | |
| CN104779790A (en) | Switched inductance quasi-Z source DC-DC converter circuit | |
| CN103825457A (en) | Quasi-Z-source DC-DC boost converter circuit | |
| CN1956304B (en) | Inhibition method for diode reverse recovery current and its circuit | |
| CN205195559U (en) | Novel DC -DC converter steps up | |
| CN204578367U (en) | A kind of Switching Power Supply of BOOST circuit topological structure | |
| CN203445602U (en) | Flyback overvoltage protection circuit | |
| CN203911863U (en) | Solar photovoltaic charging control apparatus | |
| CN102480229A (en) | Isometric-ratio voltage reducing switch power source | |
| CN214045464U (en) | Switching circuit, power supply equipment and electrical equipment | |
| CN201256072Y (en) | Single tube switch power supply for self-coupling switch transformer | |
| CN201438672U (en) | DC-DC direct current power circuit | |
| Xiao et al. | Primary-side controlled flyback converter with current compensation in micro-power applications | |
| CN102545609A (en) | High-power supply based on multi-phase PWM controller | |
| CN208369477U (en) | A kind of boost DC-DC converter based on switching capacity | |
| CN108649797B (en) | DC-DC power supply structure based on Boost positive and negative output | |
| CN203590041U (en) | Flyback step-up protection circuit |
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 |