CN108631564A - A kind of novel power supply Parallel opertation control circuit - Google Patents
A kind of novel power supply Parallel opertation control circuit Download PDFInfo
- Publication number
- CN108631564A CN108631564A CN201710164026.3A CN201710164026A CN108631564A CN 108631564 A CN108631564 A CN 108631564A CN 201710164026 A CN201710164026 A CN 201710164026A CN 108631564 A CN108631564 A CN 108631564A
- Authority
- CN
- China
- Prior art keywords
- mosfet
- operational amplifier
- impedance network
- output
- power supply
- 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
- 230000009514 concussion Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 206010010254 Concussion Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention relates to a kind of novel power supply Parallel opertation control circuits, including operational amplifier, first impedance network, second impedance network, third impedance network, MOSFET and reference voltage, the negative input of the operational amplifier connects the anode of the reference voltage by first impedance network, second impedance network is set between the negative input and output end of the operational amplifier, the electrode input end of the operational amplifier connects the ends S of the MOSFET by the third impedance network, the output of the operational amplifier connects the ends G of the MOSFET, the cathode of the reference voltage connects the ends D of the MOSFET.Beneficial effects of the present invention：Using feedback control, MOSFET gate voltages are adjusted so that MOSFET works both end voltage stabilization in setting value, and output concussion output ripple voltage becomes larger when to solve the problems, such as light load.
Description
Technical field
The present invention relates to electronic circuit technology field more particularly to a kind of novel power supply Parallel opertation control circuits.
Background technology
For power supply when used in parallel, output current, which is flow backwards, in order to prevent enters power supply, and the output of usual every power supply can go here and there
Join a diode, but does so, in high current power supply system, since diode conduction voltage drop will produce greatly a large amount of losses,
So generally use MOSFET is lost to replace diode to reduce, but traditional control method is, when MOSFET both end voltages are big
It is operated in opening state when opening threshold value, off state is operated in when less than shutdown threshold value, so when system load is light,
MOSFET can continually switch between opening and turning off, and output concussion output ripple voltage is caused to become larger.
Invention content
In view of this, the object of the present invention is to provide a kind of novel power supply Parallel opertation control circuit, to solve existing skill
Deficiency in art.
In order to achieve the above object, the purpose of the present invention is be achieved through the following technical solutions：
A kind of novel power supply Parallel opertation control circuit, including operational amplifier, the first impedance network, the second impedance are provided
The negative input of network, third impedance network, MOSFET and reference voltage, the operational amplifier passes through first impedance
The anode of reference voltage described in network connection, second impedance network are set to the negative input of the operational amplifier and defeated
Between outlet, the electrode input end of the operational amplifier connects the ends S of the MOSFET, institute by the third impedance network
The output for stating operational amplifier connects the ends G of the MOSFET, and the cathode of the reference voltage connects the ends D of the MOSFET.
Above-mentioned novel power supply Parallel opertation control circuit, wherein the MOSFET is N-channel MOS FET.
Compared with the prior art, the beneficial effects of the present invention are：
Using feedback control, MOSFET gate voltages are adjusted so that the MOSFET both end voltages that work are stablized in setting value, from
And solve the problems, such as that output concussion output ripple voltage becomes larger when light load.
Description of the drawings
The attached drawing for constituting the part of the present invention is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of power sources in parallel output control circuit of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Refering to what is shown in Fig. 1, novel power supply Parallel opertation control circuit of the present invention includes operational amplifier OP1, the first impedance
Network Z1, the second impedance network Z2, third impedance network Z3, MOSFET Q1 and reference voltage Vref, operational amplifier OP1's
Negative input is by the anode of the first impedance network Z1 connection reference voltage Vrefs, and the second impedance network Z2 is set on operation amplifier
Between the negative input and output end of device OP1, the electrode input end of operational amplifier OP1 passes through the Z3 connections of third impedance network
The ends S of MOSFET Q1, the ends G of the output connection MOSFET Q1 of operational amplifier OP1, the cathode connection of reference voltage Vref
The ends D of MOSFET Q1.In the technical program, MOSFET Q1 are N-channel MOS FET.
With continued reference to diagram, Vin is input voltage, and Vout is output voltage, and Z1, Z2, Z3 are that resistance and capacitance are constituted
Impedance network prevents OP1 output concussions for filtering and feedback loop compensation.If Vin-Vout>Vref, OP1 output voltage meeting
It increases so that Q1 tends to open-minded, and Vout voltage increases so that Vin-Vout=Vref；If Vin-Vout<Vref, OP1 output electricity
Pressure can reduce so that Q1 tends to shutdown, and Vout voltage reduces so that Vin-Vout=Vref；So OP1 can adjust Q1 in real time
Driving voltage makes Vin-Vout always be equal to Vref, i.e. Vout is constantly equal to Vin-Vref, is exported to stablize, does not shake line
Wave.
From above-described embodiment as can be seen that advantage of the invention is that：
Using feedback control, MOSFET gate voltages are adjusted so that the MOSFET both end voltages that work are stablized in setting value, from
And solve the problems, such as that output concussion output ripple voltage becomes larger when light load.
Specific embodiments of the present invention are described in detail above, but the present invention is not restricted to tool described above
Body embodiment, is intended only as example.To those skilled in the art, any equivalent modifications and replacement are also all in the present invention
Scope among.Therefore, made impartial conversion and modification without departing from the spirit and scope of the invention, should all cover
In the scope of the present invention.
Claims (2)
1. a kind of novel power supply Parallel opertation control circuit, which is characterized in that including operational amplifier, the first impedance network,
The negative input of two impedance networks, third impedance network, MOSFET and reference voltage, the operational amplifier passes through described
One impedance network connects the anode of the reference voltage, and the cathode that second impedance network is set to the operational amplifier inputs
Between end and output end, the electrode input end of the operational amplifier connects the MOSFET's by the third impedance network
The ends S, the output of the operational amplifier connect the ends G of the MOSFET, and the cathode of the reference voltage connects the MOSFET
The ends D.
2. novel power supply Parallel opertation control circuit as described in claim 1, which is characterized in that the MOSFET is N-channel
MOSFET。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164026.3A CN108631564A (en) | 2017-03-20 | 2017-03-20 | A kind of novel power supply Parallel opertation control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164026.3A CN108631564A (en) | 2017-03-20 | 2017-03-20 | A kind of novel power supply Parallel opertation control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108631564A true CN108631564A (en) | 2018-10-09 |
Family
ID=63686879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164026.3A Pending CN108631564A (en) | 2017-03-20 | 2017-03-20 | A kind of novel power supply Parallel opertation control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108631564A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169670A (en) * | 2006-10-25 | 2008-04-30 | 盛群半导体股份有限公司 | Voltage stabilizer comprising accelerated return for output |
| CN103391016A (en) * | 2013-07-29 | 2013-11-13 | 魏其萃 | MOSFET synchronous rectification circuit directly connected in parallel with output capacitor and method |
| CN104977960A (en) * | 2015-07-02 | 2015-10-14 | 中国电子科技集团公司第三十六研究所 | Power supply system and electronic device with the same |
| CN105634413A (en) * | 2015-12-29 | 2016-06-01 | 宁波市安博新能源科技有限公司 | Operational amplifier control circuit |
| CN206533276U (en) * | 2017-03-20 | 2017-09-29 | 上海派亚电气技术有限公司 | A kind of novel power supply Parallel opertation controls circuit |
-
2017
- 2017-03-20 CN CN201710164026.3A patent/CN108631564A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169670A (en) * | 2006-10-25 | 2008-04-30 | 盛群半导体股份有限公司 | Voltage stabilizer comprising accelerated return for output |
| CN103391016A (en) * | 2013-07-29 | 2013-11-13 | 魏其萃 | MOSFET synchronous rectification circuit directly connected in parallel with output capacitor and method |
| CN104977960A (en) * | 2015-07-02 | 2015-10-14 | 中国电子科技集团公司第三十六研究所 | Power supply system and electronic device with the same |
| CN105634413A (en) * | 2015-12-29 | 2016-06-01 | 宁波市安博新能源科技有限公司 | Operational amplifier control circuit |
| CN206533276U (en) * | 2017-03-20 | 2017-09-29 | 上海派亚电气技术有限公司 | A kind of novel power supply Parallel opertation controls circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6434913B2 (en) | Power supply and power supply voltage adjustment method | |
| CN205563344U (en) | Voltage control circuit and portable electronic equipment | |
| CN105680431B (en) | A kind of adjustable current-limiting protection circuit | |
| CN107276417A (en) | A kind of power-supply system | |
| CN101916128A (en) | Method and corresponding circuit for improving output power supply rejection ratio of band-gap reference source | |
| CN110311562A (en) | A kind of DC-DC converter | |
| CN106208753B (en) | Intelligent pulse control circuit | |
| CN103631299B (en) | A kind of constant pressure difference, variable output voltage low pressure difference linear voltage regulator | |
| CN112769093A (en) | Current-limiting control circuit, chip and power supply | |
| CN104393760B (en) | The positive negative output low voltage difference with short-circuit protection function adjusts circuit | |
| WO2020155799A1 (en) | Current control circuit and control method therefor | |
| CN106655764B (en) | Alternating expression buck converter | |
| CN103516218B (en) | Power supply device | |
| CN106300965B (en) | A kind of booster power LDO power supply system based on load supplying | |
| CN206533276U (en) | A kind of novel power supply Parallel opertation controls circuit | |
| CN108631564A (en) | A kind of novel power supply Parallel opertation control circuit | |
| CN207283409U (en) | A kind of power-supply system | |
| CN108649798A (en) | A kind of high-power linear power supply and its control circuit | |
| CN104049667A (en) | High-bandwidth high-PSRR low-pressure-drop linear voltage regulator | |
| CN209708002U (en) | A kind of current-limiting circuit for low-voltage low voltage difference LDO | |
| WO2019015205A1 (en) | Converter and voltage reduction method therefor, and electronic device | |
| CN204442180U (en) | A kind of underloading interval puts initialization circuit | |
| CN107493022A (en) | A kind of low-voltage efficient charge pump | |
| CN203339960U (en) | Boost circuit | |
| CN103425167B (en) | Constant voltage and constant current control circuit |
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 |