CN109274261A - A kind of non-isolated negative pressure output control circuit and control method - Google Patents
A kind of non-isolated negative pressure output control circuit and control method Download PDFInfo
- Publication number
- CN109274261A CN109274261A CN201811457243.2A CN201811457243A CN109274261A CN 109274261 A CN109274261 A CN 109274261A CN 201811457243 A CN201811457243 A CN 201811457243A CN 109274261 A CN109274261 A CN 109274261A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- output
- resistance
- feedback
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
Abstract
The present invention relates to a kind of non-isolated negative pressure output control circuit and control methods, including voltage sample circuit, voltage conversion circuit and feedback signal to compare amplifying circuit；The voltage sample circuit, for being sampled to output voltage；The voltage conversion circuit, the negative voltage transition for acquiring voltage sample circuit are positive voltage；The feedback signal compares amplifying circuit, and for the positive voltage of conversion and reference voltage to be compared, error amplification, amplified signal controls the duty ratio of driving signal to realize the stabilization of output voltage.The present invention realizes negative feedback control according to the negative pressure of output and the logic control relation of feedback control signal, using the circuit form of non-isolated feedback and the method for " voltage is first converted, then is controlled ", so that the negative pressure of output be made to keep stablizing.Control circuit of the present invention has the characteristics that feedback delay link is few, system response is fast, circuit structure is simple, control is accurate.
Description
Technical field
The present invention relates to switch power technology fields, and in particular to a kind of non-isolated negative pressure output control circuit and controlling party
Method.
Background technique
Switching Power Supply is widely used in industry and national defence, is space flight, aviation, ship, weapons, railway, communication, medical electric
Core devices in the military-civil electronic system such as son, industrial automation equipment, it provides stable voltage for system, directly determines
Can system operate normally.With the rapid development of electronic technology, the demand to negative pressure output switch power source increasingly increases, performance
It is continuously improved with reliability requirement, and as electronic equipment is increasingly miniaturized, it is desirable that power supply lightweight, miniaturization.Mesh
Before, the common feedback system of Switching Power Supply has isolation feedback and non-isolated feedback, and isolation feedback is generally anti-using photoelectrical coupler
Feedback and Magnetic isolation feedback, the feed circuit of photoelectrical coupler feedback is simple, but suitable for application in highly reliable field, as space flight,
The Flouride-resistani acid phesphatases occasion such as aviation, Magnetic isolation feedback reliability is high, does not influence vulnerable to the external world, but component is more, volume is larger, unfavorable
In lightweight, miniaturization, it is not easy to realize in the case where volume is limited.
Summary of the invention
The purpose of the present invention is to provide a kind of non-isolated negative pressure output control circuit and control method, circuit structure letters
List, control is accurate, reduces feedback delay link, improves the response speed of system.
To achieve the above object, the invention adopts the following technical scheme:
A kind of non-isolated negative pressure output control circuit, including voltage sample circuit, voltage conversion circuit and feedback signal ratio
Compared with amplifying circuit；
The voltage sample circuit, for being sampled to output voltage；
The voltage conversion circuit, the negative voltage transition for acquiring voltage sample circuit are positive voltage；
The feedback signal compares amplifying circuit, and for the positive voltage of conversion and reference voltage to be compared, error is put
Greatly, amplified signal controls the duty ratio of driving signal to realize the stabilization of output voltage.
As a further improvement of the above technical scheme:
The voltage sample circuit includes resistance R1, resistance R2, and one end of the resistance R1 is connect with output voltage, resistance
The other end of R1 is connect with one end of resistance R2, and the other end of the resistance R2 is connect with output ground.
The voltage conversion circuit uses divider resistance R3, one end of the divider resistance R3 and voltage sample circuit it is defeated
Outlet connection, the other end of resistance R3 are connect with voltage source.
It includes reference voltage circuit, operational amplifier N1, feedback resistance R5, feedback that the feedback signal, which compares amplifying circuit,
Capacitor C1, the reference voltage circuit include reference voltage source N2 and current-limiting resistance R4, the cathode of the reference voltage source N2 with
The inverting input terminal of operational amplifier N1 connects, and the anode of reference voltage source N2 is connect with output ground, the ginseng of reference voltage source N2
It examines end to connect with its cathode, one end of the resistance R4 is connect with the cathode of reference voltage source N2, the other end and auxiliary power supply
Voltage connection, one end of the feedback resistance R5 are connect with the output end of operational amplifier N1, the other end warp of feedback resistance R5
Feedback capacity C1 is connect with the inverting input terminal of operational amplifier N1.
A kind of control method of non-isolated negative pressure output control circuit, comprising the following steps:
Output voltage is sampled by voltage sample circuit, obtains positive voltage through voltage conversion circuit, by acquisition
Positive electricity force feed to feedback signal compares the non-inverting input terminal of amplifying circuit；
The reference voltage that reference voltage circuit exports is sent to feedback signal to the inverting input terminal for comparing amplifying circuit, when defeated
When voltage reduces out, the positive voltage for being superimposed acquisition reduces, and the output voltage that feedback signal compares amplifying circuit reduces, for controlling
The duty ratio of driving signal reduces, so that output voltage amplitude reduces, output voltage is negative, therefore output voltage is to increase,
Realize output voltage stabilization；
When output voltage increases, the positive voltage for being superimposed acquisition increases, and feedback signal compares the homophase input of amplifying circuit
Voltage is held to be higher than the reference voltage of inverting input terminal, the output voltage that feedback signal compares amplifying circuit increases, drives for controlling
The duty ratio of dynamic signal increases, so that output voltage amplitude increases, output voltage is negative, therefore output voltage is to reduce, real
Existing output voltage stabilization.
As shown from the above technical solution, the present invention is according to the negative pressure of output and the logic control relation of feedback control signal,
Using the method for the circuit form and " voltage is first converted, then is controlled " of non-isolated feedback, utilize " superposition theorem " by negative output
Voltage sampling signal is converted to positive voltage signal, then controls pulse width modulator duty in drive control circuit after being compared, being amplified
Than negative feedback control being realized, so that the negative pressure of output be made to keep stablizing.Control circuit of the present invention have feedback delay link it is few,
The features such as system response is fast, circuit structure is simple, control is accurate.
Detailed description of the invention
Fig. 1 is the circuit diagram of the non-isolated negative pressure output control circuit of the present invention；
Fig. 2 is that the feedback signal of the negative output voltage independent role of the non-isolated negative pressure output control circuit of the present invention is relatively put
Big circuit equivalent circuit diagram；
Fig. 3 is that the feedback signal of the voltage source independent role of the non-isolated negative pressure output control circuit of the present invention compares amplification electricity
Road equivalent circuit diagram.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
As shown in Figure 1, the non-isolated negative pressure output control circuit of the present embodiment, including the conversion of voltage sample circuit, voltage
Circuit and feedback signal compare amplifying circuit；Wherein, voltage sample circuit, for being sampled to output voltage；Voltage conversion
Circuit, the negative voltage transition for acquiring voltage sample circuit are positive voltage；Feedback signal compares amplifying circuit, for that will turn
The positive voltage and reference voltage changed be compared, error amplification, and amplified signal controls the duty ratio of driving signal with reality
The stabilization of existing output voltage.
The present embodiment, voltage sample circuit includes resistance R1, resistance R2, and voltage conversion circuit uses divider resistance R3,
One end of resistance R1 is connect with output voltage, and the other end of resistance R1 is connect with one end of resistance R2, the other end of resistance R2
It is connect with output ground.One end of divider resistance R3 and the output end of voltage sample circuit connect, the other end and voltage of resistance R3
Source connection.
It includes reference voltage circuit, operational amplifier N1, feedback resistance R5, feedback capacity that feedback signal, which compares amplifying circuit,
C1, reference voltage circuit include reference voltage source N2 and current-limiting resistance R4, the cathode and operational amplifier N1 of reference voltage source N2
Inverting input terminal connection, the anode of reference voltage source N2 connect with output ground, the reference end of reference voltage source N2 and its cathode
Connection, one end of resistance R4 are connect with the cathode of reference voltage source N2, and the other end is connect with auxiliary power supply voltage, feedback resistance
One end of R5 is connect with the output end of operational amplifier N1, and the other end of feedback resistance R5 is through feedback capacity C1 and operational amplifier
The inverting input terminal of N1 connects.
The operation principle of the present invention is that:
Output voltage sample circuit samples output voltage, i.e. the negative sampled resistance R1 of output voltage and sampling electricity
Resistance R2 divides to obtain negative sampled voltage.The voltage source of voltage conversion circuit obtains positive voltage through divider resistance R3, will using superposition theorem
Negative sampled voltage is superimposed with positive voltage obtains positive voltage.
The positive voltage that voltage conversion circuit obtains is input to the non-inverting input terminal of operational amplifier N1, and reference voltage circuit is defeated
Reference voltage is sent to the inverting input terminal of operational amplifier N1 out, the two compare error signal is amplified, control driving control
The driving signal of circuit output processed.When output voltage increases (amplitude of negative pressure reduces), the positive voltage for being superimposed acquisition increases, fortune
The non-inverting input terminal voltage for calculating amplifier N1 is higher than the reference voltage of inverting input terminal, and operational amplifier N1 output voltage increases,
The drive signal duty cycle of drive control circuit output increases, so that output voltage reduces (increase of negative pressure amplitude), conversely, when defeated
When voltage reduces out (amplitude of negative pressure increases), the positive voltage for being superimposed acquisition reduces, the non-inverting input terminal electricity of operational amplifier N1
The reference voltage in inverting input terminal is forced down, operational amplifier N1 output voltage reduces, the driving letter of drive control circuit output
Number duty ratio reduces, so that output voltage increases (reductions of negative pressure amplitude), realization makes to export to the negative feedback control of output voltage
Voltage stabilization.
As shown in Figure 2 and Figure 3, if the voltage of A point is VA, according to superposition theorem, VOUTWith voltage source V1Two independences can be regarded as
Voltage source, VAIt should be VOUTAnd V1The algebraical sum of voltage under independent role.
VOUTIndependent role, if the voltage of A point is VA1, the characteristics of according to operational amplifier " empty short ", " void is disconnected ", circuit connects
R2 and R3 parallel connection is connected in connect with R1 again, then:
V1Independent role, if the voltage of A point is VA2, similarly, circuit connection is that R1 and R2 parallel connection is connected with R3 again, then:
It is the sum of the voltage of two voltage source independent actions by the voltage that superposition theorem can obtain A point:
According to VACalculation formula, VOUTWhen < 0, suitable V is designed1, R1, R2, R3, can be realized VA> 0 realizes sampling
Polarity of voltage conversion.Work as VOUT(reduction of negative pressure amplitude), V when increaseAHigher than reference voltage, operational amplifier output increases, pulsewidth
Modulator duty ratio increases, and the negative pressure of output will reduce (increase of negative pressure amplitude)；Conversely, working as VOUTReduce (increase of negative pressure amplitude),
VAWhen lower than reference voltage, operational amplifier output reduces, and pulse width modulator duty ratio reduces, and the negative pressure of output will increase (negative
Pressure amplitude value reduces), so that the negative pressure of output be made to keep stablizing.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (5)
1. a kind of non-isolated negative pressure output control circuit, it is characterised in that: including voltage sample circuit, voltage conversion circuit and anti-
Feedback signal compares amplifying circuit；
The voltage sample circuit, for being sampled to output voltage；
The voltage conversion circuit, the negative voltage transition for acquiring voltage sample circuit are positive voltage；
The feedback signal compares amplifying circuit, for the positive voltage of conversion and reference voltage to be compared, error amplification, lead to
Amplified signal is crossed to control the duty ratio of driving signal to realize the stabilization of output voltage.
2. non-isolated negative pressure output control circuit according to claim 1, it is characterised in that: the voltage sample circuit packet
Resistance R1, resistance R2 are included, one end of the resistance R1 is connect with output voltage, and the other end of resistance R1 and one end of resistance R2 connect
It connects, the other end of the resistance R2 is connect with output ground.
3. non-isolated negative pressure output control circuit according to claim 1, it is characterised in that: the voltage conversion circuit is adopted
With divider resistance R3, one end of the divider resistance R3 and the output end of voltage sample circuit are connected, the other end of resistance R3 with
Voltage source connection.
4. non-isolated negative pressure output control circuit according to claim 1, it is characterised in that: the feedback signal is relatively put
Big circuit includes reference voltage circuit, operational amplifier N1, feedback resistance R5, feedback capacity C1, the reference voltage circuit packet
The inverting input terminal of the cathode and operational amplifier N1 that include reference voltage source N2 and current-limiting resistance R4, the reference voltage source N2 connects
It connects, the anode of reference voltage source N2 is connect with output ground, and the reference end of reference voltage source N2 is connect with its cathode, the resistance R4
One end connect with the cathode of reference voltage source N2, the other end is connect with auxiliary power supply voltage, the one of the feedback resistance R5
End is connect with the output end of operational amplifier N1, and the other end of feedback resistance R5 is through the anti-of feedback capacity C1 and operational amplifier N1
The connection of phase input terminal.
5. the control method of non-isolated negative pressure output control circuit according to claim 1, which is characterized in that including following
Step:
Output negative pressure is sampled by voltage sample circuit, positive voltage is obtained through voltage conversion circuit, by the positive electricity of acquisition
Force feed to feedback signal compares the non-inverting input terminal in amplifying circuit；
The reference voltage that reference voltage circuit exports is sent to feedback signal to the inverting input terminal for comparing amplifying circuit, when output electricity
When pressure reduces, the positive voltage for being superimposed acquisition reduces, and the output voltage that feedback signal compares amplifying circuit reduces, for controlling driving
The duty ratio of signal reduces, so that output voltage amplitude reduces, output voltage is negative, therefore output voltage is to increase, and is realized
Output voltage stabilization；
When output voltage increases, the positive voltage for being superimposed acquisition increases, and feedback signal compares the non-inverting input terminal electricity of amplifying circuit
Pressure is higher than the reference voltage of inverting input terminal, and the output voltage that feedback signal compares amplifying circuit increases, for controlling driving letter
Number duty ratio increase so that output voltage amplitude increases, output voltage is negative, therefore output voltage is to reduce, and is realized defeated
Voltage stabilization out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457243.2A CN109274261A (en) | 2018-11-30 | 2018-11-30 | A kind of non-isolated negative pressure output control circuit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457243.2A CN109274261A (en) | 2018-11-30 | 2018-11-30 | A kind of non-isolated negative pressure output control circuit and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109274261A true CN109274261A (en) | 2019-01-25 |
Family
ID=65186169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811457243.2A Pending CN109274261A (en) | 2018-11-30 | 2018-11-30 | A kind of non-isolated negative pressure output control circuit and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109274261A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111526641A (en) * | 2020-05-15 | 2020-08-11 | 深圳市洲明科技股份有限公司 | Back pressure self-adjusting method and device |
| CN112468100A (en) * | 2020-12-09 | 2021-03-09 | 中国电子科技集团公司第四十三研究所 | Non-isolated negative-pressure output sampling comparison amplifying circuit |
| CN113809914A (en) * | 2021-08-13 | 2021-12-17 | 广州金升阳科技有限公司 | Constant voltage control circuit |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1430326A (en) * | 2001-12-21 | 2003-07-16 | 富士通株式会社 | Bipolar supply voltage generator and its semiconductor device |
| CN1464625A (en) * | 2002-06-04 | 2003-12-31 | 智邦科技股份有限公司 | Power supply for generating positive and negative voltage |
| JP2006204016A (en) * | 2005-01-20 | 2006-08-03 | Canon Inc | High-voltage power supply unit and image forming apparatus |
| JP2007028732A (en) * | 2005-07-13 | 2007-02-01 | Rohm Co Ltd | Switching circuit and switching power unit |
| CN101027828A (en) * | 2004-11-26 | 2007-08-29 | 哉英电子股份有限公司 | Switching power supply |
| CN102468746A (en) * | 2011-11-18 | 2012-05-23 | 中国船舶重工集团公司第七二四研究所 | Method for applying single-supply error amplifier to negative high voltage power control circuit |
| CN203691243U (en) * | 2013-12-19 | 2014-07-02 | 东文高压电源（天津）有限公司 | Negative polarity adjustable high voltage supply circuit composed of TL5001A |
| CN104393760A (en) * | 2014-11-27 | 2015-03-04 | 中国兵器工业集团第二一四研究所苏州研发中心 | Positive-negative output low dropout adjusting circuit with short-circuit protection function |
| CN105207489A (en) * | 2015-10-26 | 2015-12-30 | 广州金升阳科技有限公司 | Loop control method and circuit for fly-back switching power supply |
| CN105468075A (en) * | 2015-12-22 | 2016-04-06 | 上海华虹宏力半导体制造有限公司 | Feedback circuit of negative voltage charge pump |
| CN105576963A (en) * | 2014-10-30 | 2016-05-11 | 联发科技（新加坡）私人有限公司 | Charge pump circuit, integrated circuit, electronic device and method therefor |
| CN208986830U (en) * | 2018-11-30 | 2019-06-14 | 中国电子科技集团公司第四十三研究所 | A kind of non-isolated negative pressure output control circuit |
-
2018
- 2018-11-30 CN CN201811457243.2A patent/CN109274261A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1430326A (en) * | 2001-12-21 | 2003-07-16 | 富士通株式会社 | Bipolar supply voltage generator and its semiconductor device |
| CN1464625A (en) * | 2002-06-04 | 2003-12-31 | 智邦科技股份有限公司 | Power supply for generating positive and negative voltage |
| CN101027828A (en) * | 2004-11-26 | 2007-08-29 | 哉英电子股份有限公司 | Switching power supply |
| JP2006204016A (en) * | 2005-01-20 | 2006-08-03 | Canon Inc | High-voltage power supply unit and image forming apparatus |
| JP2007028732A (en) * | 2005-07-13 | 2007-02-01 | Rohm Co Ltd | Switching circuit and switching power unit |
| CN102468746A (en) * | 2011-11-18 | 2012-05-23 | 中国船舶重工集团公司第七二四研究所 | Method for applying single-supply error amplifier to negative high voltage power control circuit |
| CN203691243U (en) * | 2013-12-19 | 2014-07-02 | 东文高压电源（天津）有限公司 | Negative polarity adjustable high voltage supply circuit composed of TL5001A |
| CN105576963A (en) * | 2014-10-30 | 2016-05-11 | 联发科技（新加坡）私人有限公司 | Charge pump circuit, integrated circuit, electronic device and method therefor |
| CN104393760A (en) * | 2014-11-27 | 2015-03-04 | 中国兵器工业集团第二一四研究所苏州研发中心 | Positive-negative output low dropout adjusting circuit with short-circuit protection function |
| CN105207489A (en) * | 2015-10-26 | 2015-12-30 | 广州金升阳科技有限公司 | Loop control method and circuit for fly-back switching power supply |
| CN105468075A (en) * | 2015-12-22 | 2016-04-06 | 上海华虹宏力半导体制造有限公司 | Feedback circuit of negative voltage charge pump |
| CN208986830U (en) * | 2018-11-30 | 2019-06-14 | 中国电子科技集团公司第四十三研究所 | A kind of non-isolated negative pressure output control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111526641A (en) * | 2020-05-15 | 2020-08-11 | 深圳市洲明科技股份有限公司 | Back pressure self-adjusting method and device |
| CN112468100A (en) * | 2020-12-09 | 2021-03-09 | 中国电子科技集团公司第四十三研究所 | Non-isolated negative-pressure output sampling comparison amplifying circuit |
| CN113809914A (en) * | 2021-08-13 | 2021-12-17 | 广州金升阳科技有限公司 | Constant voltage control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109274261A (en) | A kind of non-isolated negative pressure output control circuit and control method | |
| CN110098740A (en) | Reduction voltage circuit and electronic equipment | |
| CN103036429A (en) | Synchronous boost converter | |
| CN104184319A (en) | Charge pump circuit as well as control circuit and control method thereof | |
| CN208986830U (en) | A kind of non-isolated negative pressure output control circuit | |
| CN204615657U (en) | A kind of topological circuit of wide input voltage isolation type switch power | |
| CN202837381U (en) | AC power down early-warning signal circuit | |
| CN104393760B (en) | The positive negative output low voltage difference with short-circuit protection function adjusts circuit | |
| CN212518763U (en) | Power supply current-sharing controller | |
| CN207053389U (en) | A kind of Switching Power Supply output overshoot suppression circuit and Switching Power Supply | |
| CN201153258Y (en) | Avalanche photodiode bias circuit and optical transmission equipment having the circuit | |
| CN205986626U (en) | Satellite position gesture measuring apparatu power module | |
| CN108512397B (en) | Power supply module, power supply system composed of power supply module and control method of power supply system | |
| CN102467147A (en) | Technology for sampling suspension high voltage of depressed collector of traveling wave tube and implementation method of technology | |
| CN109149935A (en) | A kind of control circuit of Switching Power Supply different working modes free switching | |
| CN103117659A (en) | Current closed-loop control circuit for series load resonant converter | |
| CN204559380U (en) | For the load driving circuits that the input of managing system of car parking is boosted | |
| CN201946562U (en) | Multi-beam traveling wave tube current control device | |
| CN202978699U (en) | Multiple-voltage switching device | |
| CN203827180U (en) | Voltage stabilization feedback circuit for automotive frequency converter power supply | |
| CN207320938U (en) | Aviation high-frequency wireless communication system flows redundant power starting with full load system | |
| CN102495658B (en) | Adjustable DC (direct current) power supply monitoring module | |
| CN111541363A (en) | High-power-based anode power supply of Hall electric thruster | |
| CN201789414U (en) | Current boosting circuit of three terminal regulator | |
| CN105207482A (en) | Induced voltage control device and DC module power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |