CN106300952B - A kind of soft-start method and circuit of inefficiency loss power output end Anti-surging - Google Patents
A kind of soft-start method and circuit of inefficiency loss power output end Anti-surging Download PDFInfo
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- CN106300952B CN106300952B CN201610945306.3A CN201610945306A CN106300952B CN 106300952 B CN106300952 B CN 106300952B CN 201610945306 A CN201610945306 A CN 201610945306A CN 106300952 B CN106300952 B CN 106300952B
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- resistance
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- diode
- soft
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- 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
- H02M1/36—Means for starting or stopping converters
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- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses soft-start methods and circuit that a kind of inefficiency loses power output end Anti-surging, including a voltage reference device U3 is arranged first, then resistance R31 and capacitance C13 is set, a zener diode ZD1 is met at tie point, current potential on capacitance C13 is connected to by diode D8 to the grid of field-effect tube Q2 again, the source electrode of field-effect tube Q2 meets secondary ground SGND, the drain electrode of field-effect tube Q2 connects power output end V nearby, resistance R29+R30 is set, is attempted by between the drain electrode of Q2 and source electrode after two resistance concatenation.Beneficial effects of the present invention are：When output end has added the soft starting circuit of Anti-surging; the moment that power supply is powered to load equipment; surge current can be limited in 5A or so; surge current an order of magnitude smaller than the 41A of common power; output surge current is greatly reduced to the rush of current of low voltage equipment, the protective effect to electrical equipment can be functioned well as.
Description
Technical field
The present invention relates to soft-start methods and electricity that power technology more particularly to inefficiency lose power output end Anti-surging
Road.
Background technology
In the prior art, general primary side does not add the Switching Power Supply of anti-surge circuit, due to power supply and is powered equipment
The electrolytic capacitor for having large capacity, when the moment that power supply is powered to load equipment, since electrolytic capacitor both end voltage cannot dash forward
Become, the similar short circuit of electrolytic capacitor, power supply gives electrolytic capacitor quick charge, will produce very high surge current, some clients load
The excessively high surge current of the heart can cause the impact to equipment, and the IC of load equipment or other electronic components is easy to damage, it is desirable to
Reduce the peak value of surge current.
By taking an output is the Switching Power Supply of 12V2A conventional designs as an example, if output end does not add the soft of Anti-surging to open
Dynamic circuit, power supply are up to 41A to the moment surge current that load equipment is powered.
The above drawback is it is desirable to get rid of it, and even to this day, the technology of having no has breakthrough.
Invention content
The purpose of the present invention is to solve the shortcomings of the prior art and providing a kind of inefficiency loss power output end wave resistance
The soft-start method and circuit gushed, the present invention are designed using a powerful field-effect tube.
The present invention is realized by using following technical scheme.
Implement a kind of soft-start method of inefficiency loss power output end Anti-surging, includes the following steps：
S1, a voltage reference device U3, the voltage reference device U3 difference are set in output end control unit first
To constant pressure output transport and placing device U4B and start Anti-surging switched-OPAMP U4A offer 2.495V reference voltages, the Anti-surging switch fortune
The output for putting U4A is connected to the grid of field-effect tube Q2 by diode D9；
S2 then output major loop electrolytic capacitor C12 anode at, connection resistance R31, electrolytic capacitor C12's
Cathode connects capacitance C13, and a zener diode ZD1 is then drawn at the tie point of resistance R31 and capacitance C13, passes through voltage stabilizing
Current potential on capacitance C13 is connected to the grid of field-effect tube Q2, the diode D8 and two by diode ZD1 by diode D8
Pole pipe D9 is connected into OR circuit；
S3, then, meets secondary ground SGND by the source electrode of field-effect tube Q2, the drain electrode of field-effect tube Q2 is connected power supply nearby
Output end V-；
S4, then is arranged resistance R29, R30, is attempted by between the drain electrode of Q2 and source electrode after two resistance concatenation.
Voltage reference device U3 described in step S1 provides 2.495V reference voltages to Anti-surging switched-OPAMP U4A is started,
Via resistance R24, resistance R25 partial pressures, it is connected on the input anode for starting Anti-surging switched-OPAMP U4A, another termination of resistance R25
In secondary ground SGND.
Voltage reference device U3 described in step S1 provides 2.495V reference voltages, the base to constant pressure output transport and placing device U4B
Quasi- voltage is connected on the electrode input end of constant pressure output transport and placing device U4B, and the negative input of constant pressure output transport and placing device U4B is connected on resistance
The dividing point of R22, R23, another output cathode V+ terminated in output major loop of resistance R22, another termination of resistance R23
In secondary ground SGND.
The cathode of the zener diode ZD1 is connected at the tie point of resistance R31 and capacitance C13, zener diode ZD1's
Anode meets a resistance R28；
The resistance R29, resistance R30 resistance value be chosen for：Soft start electric current I=output voltage/(R29+ R30)；
The voltage reference device U3 selects TL431.
A kind of soft starting circuit of inefficiency loss power output end Anti-surging, the circuit include：
The cathode of one output end control unit, voltage reference device U3 therein meets output cathode V+ by resistance R19,
Anode meets secondary ground SGND, and after control pole is connected together with cathode, connection constant pressure output transport and placing device U4B and startup Anti-surging are opened
Amplifier U4A is closed, reference voltage is provided to the two；The output of the Anti-surging switched-OPAMP U4A is connected to field by diode D9
The grid of effect pipe Q2；
At the anode of the electrolytic capacitor C12 of output major loop, resistance R31 is connected, is connected in the cathode of electrolytic capacitor C12
Then capacitance C13 draws a zener diode ZD1 at the tie point of resistance R31 and capacitance C13, passes through zener diode ZD1
Current potential on capacitance C13 is connected to the grid of field-effect tube Q2 by diode D8, the diode D8 and diode D9 connect
At OR circuit；
The source electrode of field-effect tube Q2 meets secondary ground SGND, and the drain electrode of field-effect tube Q2 connects power output end V- nearby；
Resistance R29, resistance R30, two resistance are attempted by after concatenating between the drain electrode of Q2 and source electrode.
The voltage reference device U3 provides 2.495V reference voltages to Anti-surging switched-OPAMP U4A is started, via electricity
R24, resistance R25 partial pressures are hindered, the input anode for starting Anti-surging switched-OPAMP U4A is connected on, the another of resistance R25 terminates at secondary
Ground SGND.
The voltage reference device U3 provides 2.495V reference voltages, the reference voltage to constant pressure output transport and placing device U4B
Be connected on the electrode input end of constant pressure output transport and placing device U4B, the negative input of constant pressure output transport and placing device U4B be connected on resistance R22,
The dividing point of R23, another output cathode V+ terminated in output major loop of resistance R22, the another of resistance R23 terminate at time
Grade ground SGND.
The cathode of the zener diode ZD1 is connected at the tie point of resistance R31 and capacitance C13, zener diode ZD1's
Anode meets a resistance R28.
The resistance R29, resistance R30 resistance value be chosen for：Soft start electric current I=output voltage/(R29+ R30).
The voltage reference device U3 selects TL431.
Beneficial effects of the present invention are：When output end has added the soft starting circuit of Anti-surging, power supply to power to load equipment
Moment, surge current can be limited in 5A or so, surge current an order of magnitude smaller than the 41A of common power, significantly
Output surge current is reduced to the rush of current of low voltage equipment, the protective effect to electrical equipment can be functioned well as.
Description of the drawings
The present invention is further detailed below with attached drawing, but the embodiment in attached drawing is not constituted to this hair
Bright any restrictions.
Fig. 1 is the electrical schematic diagram of soft-start method and circuit that inefficiency of the present invention loses power output end Anti-surging；
Fig. 2 is the flow chart of soft-start method and circuit that inefficiency of the present invention loses power output end Anti-surging.
Specific implementation mode
With reference to specific embodiment, the present invention will be described.
Such as Fig. 1~preferred forms shown in Fig. 2, implements a kind of inefficiency loss the soft of power output end Anti-surging and open
Dynamic method, includes the following steps：
S1, voltage reference device a U3, the voltage reference device U3 point is set in output end control unit 11 first
2.495V reference voltages, the Anti-surging switch are not provided to constant pressure output transport and placing device U4B and startup Anti-surging switched-OPAMP U4A
The output of amplifier U4A is connected to the grid of field-effect tube Q2 by diode D9；
S2 then output major loop 10 electrolytic capacitor C12 anode at, connection resistance R31, in electrolytic capacitor C12
Cathode connect capacitance C13, then at the tie point of resistance R31 and capacitance C13 draw a zener diode ZD1, by steady
Current potential on capacitance C13 is connected to the grid of field-effect tube Q2 by pressure diode ZD1 by diode D8, the diode D8 and
Diode D9 is connected into OR circuit；
S3, then, meets secondary ground SGND by the source electrode of field-effect tube Q2, the drain electrode of field-effect tube Q2 is connected power supply nearby
Output end V-；
S4, then is arranged resistance R29, R30, is attempted by between the drain electrode of Q2 and source electrode after two resistance concatenation.
Voltage reference device U3 described in step S1 is provided to Anti-surging switched-OPAMP U4A is started
2.495V reference voltages are connected on startup Anti-surging and open via resistance R24, resistance R25 partial pressures
The input anode of amplifier U4A is closed, the another of resistance R25 terminates at secondary ground SGND.
Voltage reference device U3 described in step S1 provides 2.495V reference voltages, the base to constant pressure output transport and placing device U4B
Quasi- voltage is connected on the electrode input end of constant pressure output transport and placing device U4B, and the negative input of constant pressure output transport and placing device U4B is connected on resistance
The dividing point of R22, R23, another output cathode V+ terminated in output major loop 10 of resistance R22, the other end of resistance R23
It is connected on secondary ground SGND.
The cathode of the zener diode ZD1 is connected at the tie point of resistance R31 and capacitance C13, zener diode ZD1's
Anode meets a resistance R28；
The resistance R29, resistance R30 resistance value be chosen for：
Soft start electric current I=output voltage/(R29+ R30)；
The voltage reference device U3 selects TL431.
A kind of soft starting circuit of inefficiency loss power output end Anti-surging, the circuit include：
The cathode of one output end control unit 11, voltage reference device U3 therein meets output cathode V+ by resistance R19,
Its anode meets secondary ground SGND, after control pole is connected together with cathode, connection constant pressure output transport and placing device U4B and startup Anti-surging
Switched-OPAMP U4A provides reference voltage to the two；The output of the Anti-surging switched-OPAMP U4A is connected to by diode D9
The grid of field-effect tube Q2；
At the anode of the electrolytic capacitor C12 of output major loop 10, resistance R31 is connected, is connected in the cathode of electrolytic capacitor C12
Capacitance C13 is met, a zener diode ZD1 is then drawn at the tie point of resistance R31 and capacitance C13, passes through zener diode
Current potential on capacitance C13 is connected to the grid of field-effect tube Q2, the diode D8 and diode D9 by ZD1 by diode D8
It is connected into OR circuit；
The source electrode of field-effect tube Q2 meets secondary ground SGND, and the drain electrode of field-effect tube Q2 connects power output end V- nearby；
Resistance R29, resistance R30, two resistance are attempted by after concatenating between the drain electrode of Q2 and source electrode.
The voltage reference device U3 provides 2.495V reference voltages to Anti-surging switched-OPAMP U4A is started, via electricity
R24, resistance R25 partial pressures are hindered, the input anode for starting Anti-surging switched-OPAMP U4A is connected on, the another of resistance R25 terminates at secondary
Ground SGND.
The voltage reference device U3 provides 2.495V reference voltages, the reference voltage to constant pressure output transport and placing device U4B
Be connected on the electrode input end of constant pressure output transport and placing device U4B, the negative input of constant pressure output transport and placing device U4B be connected on resistance R22,
The dividing point of R23, another output cathode V+ terminated in output major loop 10 of resistance R22, the another of resistance R23 terminate at
Secondary ground SGND.
The cathode of the zener diode ZD1 is connected at the tie point of resistance R31 and capacitance C13, zener diode ZD1's
Anode meets a resistance R28.
The resistance R29, resistance R30 resistance value be chosen for：
Soft start electric current I=output voltage/(R29+ R30).
The voltage reference device U3 selects TL431 or the device of compatibility.
Resistance R31 charges to electrolytic capacitor C13, when capacitance C13 voltages are raised to 10V or more, field-effect tube Q2 grids
There is driving voltage and be connected, D~S (leakage~source) pole of Q2 is equivalent to a control switch, drain electrode~source of such Q2
Just by R29, R30 short circuit, the main flow direction of electric current is drain electrode~source electrode~secondary ground SGND by Q2, subsequent power supply work for pole
Make to enter stable state.
Start Anti-surging switched-OPAMP U4A and constitute anti-disturbance circuit, because the purpose of present patent application is Anti-surging electric current
The method of soft start, the when part for occurring starting the surge current of moment is very of short duration, is existed if there is disturbing, then Anti-surging
The effect of electric current soft start is with regard to poor, so the setting for starting Anti-surging switched-OPAMP U4A ensure that Q2 is starting the reliable of moment
Cut-off ensures so that starting current is flowed through from R29, R30.
The above content is only presently preferred embodiments of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (10)
1. a kind of soft-start method of inefficiency loss power output end Anti-surging, which is characterized in that the method includes the steps：
S1, first in output end control unit（11）One voltage reference device U3 of middle setting, the voltage reference device U3 difference
To constant pressure output transport and placing device U4B and start Anti-surging switched-OPAMP U4A offer 2.495V reference voltages, the Anti-surging switch fortune
The output for putting U4A is connected to the grid of field-effect tube Q2 by diode D9；
S2 then output major loop（10）Electrolytic capacitor C12 anode place, connection resistance R31, electrolytic capacitor C12's
Cathode connects capacitance C13, and a zener diode ZD1 is then drawn at the tie point of resistance R31 and capacitance C13, passes through voltage stabilizing
Current potential on capacitance C13 is connected to the grid of field-effect tube Q2, the diode D8 and two by diode ZD1 by diode D8
Pole pipe D9 is connected into OR circuit；
S3, then, secondary ground SGND is met by the source electrode of field-effect tube Q2, and the drain electrode of field-effect tube Q2 is connected power supply output nearby
Hold V-；
S4, then is arranged resistance R29, R30, is attempted by between the drain electrode of Q2 and source electrode after two resistance concatenation.
2. the soft-start method of inefficiency loss power output end Anti-surging according to claim 1, which is characterized in that
Voltage reference device U3 described in step S1 is provided to Anti-surging switched-OPAMP U4A is started
2.495V reference voltages are being connected on the input of startup Anti-surging switched-OPAMP U4A just via resistance R24, resistance R25 partial pressures
Pole, the another of resistance R25 terminate at secondary ground SGND.
3. the soft-start method of inefficiency loss power output end Anti-surging according to claim 1, it is characterised in that：
Voltage reference device U3 described in step S1 provides 2.495V reference voltages, benchmark electricity to constant pressure output transport and placing device U4B
Be crimped on the electrode input end of constant pressure output transport and placing device U4B, the negative input of constant pressure output transport and placing device U4B be connected on resistance R22,
The dividing point of R23, the another of resistance R22 terminate at output major loop（10）In output cathode V+, another termination of resistance R23
In secondary ground SGND.
4. the soft-start method of inefficiency loss power output end Anti-surging according to claim 1, which is characterized in that institute
The cathode for stating zener diode ZD1 is connected at the tie point of resistance R31 and capacitance C13, and the anode of zener diode ZD1 connects an electricity
Hinder R28；
The resistance R29, resistance R30 resistance value be chosen for：Soft start electric current I=output voltage/(R29+ R30)；
The voltage reference device U3 selects TL431.
5. a kind of soft starting circuit of inefficiency loss power output end Anti-surging, which is characterized in that the circuit includes：
One output end control unit（11）, the cathode of voltage reference device U3 therein meets output cathode V+ by resistance R19,
Anode meets secondary ground SGND, and after control pole is connected together with cathode, connection constant pressure output transport and placing device U4B and startup Anti-surging are opened
Amplifier U4A is closed, reference voltage is provided to the two；The output of the Anti-surging switched-OPAMP U4A is connected to field by diode D9
The grid of effect pipe Q2；
In output major loop（10）Electrolytic capacitor C12 anode place, connect resistance R31, electrolytic capacitor C12 cathode connection
Then capacitance C13 draws a zener diode ZD1 at the tie point of resistance R31 and capacitance C13, passes through zener diode ZD1
Current potential on capacitance C13 is connected to the grid of field-effect tube Q2 by diode D8, the diode D8 and diode D9 connect
At OR circuit；
The source electrode of field-effect tube Q2 meets secondary ground SGND, and the drain electrode of field-effect tube Q2 connects power output end V- nearby；
Resistance R29, resistance R30, two resistance are attempted by after concatenating between the drain electrode of Q2 and source electrode.
6. the soft starting circuit of inefficiency loss power output end Anti-surging according to claim 5, which is characterized in that institute
The voltage reference device U3 stated provides 2.495V reference voltages to Anti-surging switched-OPAMP U4A is started, via resistance R24, resistance
R25 is divided, and is connected on the input anode for starting Anti-surging switched-OPAMP U4A, and the another of resistance R25 terminates at secondary ground SGND.
7. the soft starting circuit of inefficiency loss power output end Anti-surging according to claim 5, which is characterized in that institute
The voltage reference device U3 stated provides 2.495V reference voltages to constant pressure output transport and placing device U4B, and it is defeated which is connected on constant pressure
Going out the electrode input end of transport and placing device U4B, the negative input of constant pressure output transport and placing device U4B is connected on the dividing point of resistance R22, R23,
The another of resistance R22 terminates at output major loop（10）In output cathode V+, the another of resistance R23 terminate at secondary ground
SGND。
8. the soft starting circuit of inefficiency loss power output end Anti-surging according to claim 5, which is characterized in that institute
The cathode for stating zener diode ZD1 is connected at the tie point of resistance R31 and capacitance C13, and the anode of zener diode ZD1 connects an electricity
Hinder R28.
9. the soft starting circuit of inefficiency loss power output end Anti-surging according to claim 5, which is characterized in that institute
State resistance R29, the resistance value of resistance R30 is chosen for：Soft start electric current I=output voltage/(R29+ R30).
10. the soft start electricity of inefficiency loss power output end Anti-surging according to claim 5
Road, which is characterized in that the voltage reference device U3 selects TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610945306.3A CN106300952B (en) | 2016-11-02 | 2016-11-02 | A kind of soft-start method and circuit of inefficiency loss power output end Anti-surging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610945306.3A CN106300952B (en) | 2016-11-02 | 2016-11-02 | A kind of soft-start method and circuit of inefficiency loss power output end Anti-surging |
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| Publication Number | Publication Date |
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| CN106300952A CN106300952A (en) | 2017-01-04 |
| CN106300952B true CN106300952B (en) | 2018-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| MX2012003225A (en) * | 2009-09-18 | 2012-09-07 | Univ Kingston | Distributed power generation interface. |
| CN103414163B (en) * | 2013-08-26 | 2016-12-28 | 中国兵器工业集团第二一四研究所苏州研发中心 | DC source output overcurrent protection device |
| CN104735845A (en) * | 2013-12-20 | 2015-06-24 | 西安信唯信息科技有限公司 | Efficient 60-W LED driving power source |
| CN205583638U (en) * | 2016-04-11 | 2016-09-14 | 上海铁路通信有限公司 | Multifunction power protection circuit |
| CN206533277U (en) * | 2016-11-02 | 2017-09-29 | 东莞市石龙富华电子有限公司 | A kind of inefficiency loses the soft starting circuit of power output end Anti-surging |
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Denomination of invention: Efficiency-loss-free power supply output end anti-surge soft starting method and circuit Effective date of registration: 20191125 Granted publication date: 20180824 Pledgee: China Co. truction Bank Corp Dongguan branch Pledgor: FUHUA ELECTRONIC Co.,Ltd. Registration number: Y2019440000232 |
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Date of cancellation: 20220824 Granted publication date: 20180824 Pledgee: China Co. truction Bank Corp Dongguan branch Pledgor: FUHUA ELECTRONIC Co.,Ltd. Registration number: Y2019440000232 |
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Denomination of invention: A soft-start method and circuit for anti-surge at the output end of a power supply with no efficiency loss Effective date of registration: 20220830 Granted publication date: 20180824 Pledgee: China Co. truction Bank Corp Dongguan branch Pledgor: FUHUA ELECTRONIC Co.,Ltd. Registration number: Y2022980014007 |