CN206533277U - A kind of inefficiency loses the soft starting circuit of power output end Anti-surging - Google Patents
A kind of inefficiency loses the soft starting circuit of power output end Anti-surging Download PDFInfo
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- CN206533277U CN206533277U CN201621174691.8U CN201621174691U CN206533277U CN 206533277 U CN206533277 U CN 206533277U CN 201621174691 U CN201621174691 U CN 201621174691U CN 206533277 U CN206533277 U CN 206533277U
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- resistance
- surging
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- voltage
- power output
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Abstract
Power output end surge-prevention soft starting circuit is lost the utility model discloses a kind of inefficiency, including setting a voltage reference device U3 first, then resistance R31 and electric capacity C13 is set, a voltage-regulator diode ZD1 is met at tie point, current potential on electric capacity C13 is connected to FET Q2 grid by diode D8 again, FET Q2 source electrode meets secondary ground SGND, FET Q2 drain electrode connects power output end V nearby, it is attempted by after resistance R29+ R30, two resistance concatenation are set between Q2 drain electrode and source electrode.The beneficial effects of the utility model 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 utility model is related to power technology, more particularly to inefficiency loses the soft start electricity of 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 being powered equipment
There is the electrochemical capacitor of Large Copacity, when the moment that power supply is powered to load equipment, because electrochemical capacitor both end voltage can not dash forward
Become, the similar short circuit of electrochemical capacitor, power supply gives electrochemical capacitor quick charge, can produce very high surge current, some clients load
The too high surge current of the heart can cause the impact to equipment, and easily the IC of load equipment or other electronic components are damaged, it is desirable to
Reduce the peak value of surge current.
So that one is output as 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, the moment surge current up to 41A that power supply is powered to load equipment.
Above drawback is it is desirable to get rid of it, even to this day, and the technology of having no has breakthrough.
Utility model content
The purpose of this utility model is to provide a kind of inefficiency loss power output end in view of the shortcomings of the prior art
The soft starting circuit of Anti-surging, the utility model is designed using a powerful FET.
The utility model is realized by using following technical scheme.
The soft starting circuit that a kind of inefficiency loses power output end Anti-surging is designed, the circuit includes：
One output end control unit, voltage reference device U3 therein negative electrode meets output cathode V+ by resistance R19, its
Anode meets secondary ground SGND, after control pole is connected together with negative electrode, and connection constant pressure output transport and placing device U4B and startup Anti-surging are opened
Amplifier U4A is closed, to the two offer reference voltage；The output of the Anti-surging switched-OPAMP U4A is connected to field by diode D9
Effect pipe Q2 grid；
At resistance R31 and electric capacity C13, the close electrochemical capacitor C12 for being connected on output major loop, in resistance R31 and electric capacity C13
Tie point at draw a voltage-regulator diode ZD1, the current potential on electric capacity C13 is passed through by diode D8 by voltage-regulator diode ZD1
FET Q2 grid is connected to, the diode D8 and diode D9 are connected into OR circuit；
FET Q2 source electrode meets secondary ground SGND, and FET Q2 drain electrode connects power output end V- nearby；
It is attempted by after resistance R29+resistance R30, two resistance concatenation between Q2 drain electrode and source electrode.
Described 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 positive pole for starting Anti-surging switched-OPAMP U4A is connected on, the another of resistance R25 terminates at secondary
Ground SGND.
Described voltage reference device U3 exports transport and placing device U4B to constant pressure and provides 2.495V reference voltages, the reference voltage
Be connected on constant pressure output transport and placing device U4B electrode input end, constant pressure output transport and placing device U4B negative input be connected on resistance R22,
R23 dividing point, resistance R22 another output cathode V+ terminated in output major loop, the another of resistance R23 terminates at time
Level ground SGND.
The negative electrode of the voltage-regulator diode ZD1 is connected at resistance R31 and electric capacity C13 tie point, voltage-regulator diode ZD1's
Anode meets a resistance R28.
The resistance of the resistance R29+resistance R30 is chosen for：Soft start electric current I=output voltage/(R29+ R30).
Described voltage reference device U3 selects TL431.
The beneficial effects of the utility model are：When output end has added the soft starting circuit of Anti-surging, power supply is to load equipment
The moment of power supply, surge current can be limited in 5A or so, surge current an order of magnitude smaller than the 41A of common power,
Rush of current of the output surge current to low voltage equipment is greatly reduced, the protection to electrical equipment can be functioned well as and made
With.
Brief description of the drawings
The utility model is further detailed below with accompanying drawing, but the embodiment in accompanying drawing is not constituted pair
Any limitation of the present utility model.
Fig. 1 is the electrical schematic diagram for the soft starting circuit that the utility model inefficiency loses power output end Anti-surging；
Fig. 2 is the flow chart for the soft starting circuit that the utility model inefficiency loses power output end Anti-surging.
Embodiment
The utility model is illustrated with reference to specific embodiment.
Preferred forms as shown in Fig. 1~Fig. 2, design a kind of the soft of inefficiency loss power output end Anti-surging
Start-up circuit, the circuit includes：
One output end control unit 11, voltage reference device U3 therein negative electrode meets output cathode V+ by resistance R19,
Its anode meets secondary ground SGND, after control pole is connected together with negative electrode, connection constant pressure output transport and placing device U4B and startup Anti-surging
Switched-OPAMP U4A, to the two offer reference voltage；The output of the Anti-surging switched-OPAMP U4A is connected to by diode D9
FET Q2 grid；
At resistance R31 and electric capacity C13, the close electrochemical capacitor C12 for being connected on output major loop 10, in resistance R31 and electric capacity
A voltage-regulator diode ZD1 is drawn at C13 tie point, the current potential on electric capacity C13 is passed through by diode by voltage-regulator diode ZD1
D8 is connected to FET Q2 grid, and the diode D8 and diode D9 are connected into OR circuit；
FET Q2 source electrode meets secondary ground SGND, and FET Q2 drain electrode connects power output end V- nearby；
It is attempted by after resistance R29+resistance R30, two resistance concatenation between Q2 drain electrode and source electrode.
Described 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 positive pole for starting Anti-surging switched-OPAMP U4A is connected on, the another of resistance R25 terminates at secondary
Ground SGND.
Described voltage reference device U3 exports transport and placing device U4B to constant pressure and provides 2.495V reference voltages, the reference voltage
Be connected on constant pressure output transport and placing device U4B electrode input end, constant pressure output transport and placing device U4B negative input be connected on resistance R22,
R23 dividing point, the another of resistance R22 terminates at output major loop（10）In output cathode V+, resistance R23 another termination
In secondary ground SGND.
The negative electrode of the voltage-regulator diode ZD1 is connected at resistance R31 and electric capacity C13 tie point, voltage-regulator diode ZD1's
Anode meets a resistance R28.
The resistance of the resistance R29+resistance R30 is chosen for：Soft start electric current I=output voltage/(R29+ R30).
Described voltage reference device U3 is from TL431 or the device of compatibility.
Resistance R31 charges to electrochemical capacitor C13, when electric capacity C13 voltages are raised to more than 10V, FET Q2 grids
There is driving voltage and turn on, the Q2 controlling switch of D~S (leakage~source) poles equivalent to one, such Q2 drain electrode~source
Pole is just by R29+R30 short circuits, and the flow direction of electric current mainly is drain electrode~source electrode~secondary ground SGND, subsequent power supply work by Q2
Work enters 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 the surge current for starting moment occur is very of short duration, if disturbance is present, then Anti-surging
The effect of electric current soft start is just poor, so the setting for starting Anti-surging switched-OPAMP U4A ensure that Q2 is starting the reliable of moment
Cut-off, it is ensured that so that starting current flows through from R29, R30.
Above content is only preferred embodiment of the present utility model, for one of ordinary skill in the art, according to this reality
With new thought, it will change in specific embodiments and applications, this specification content should not be construed as
To limitation of the present utility model.
Claims (6)
1. a kind of inefficiency loses the soft starting circuit of power output end Anti-surging, it is characterised in that the circuit includes：
One output end control unit（11）, voltage reference device U3 therein negative electrode meets output cathode V+ by resistance R19, its
Anode meets secondary ground SGND, after control pole is connected together with negative electrode, and connection constant pressure output transport and placing device U4B and startup Anti-surging are opened
Amplifier U4A is closed, to the two offer reference voltage；The output of the Anti-surging switched-OPAMP U4A is connected to field by diode D9
Effect pipe Q2 grid；
Resistance R31 and electric capacity C13, is connected on output major loop（10）Close electrochemical capacitor C12 at, in resistance R31 and electric capacity C13
Tie point at draw a voltage-regulator diode ZD1, the current potential on electric capacity C13 is passed through by diode D8 by voltage-regulator diode ZD1
FET Q2 grid is connected to, the diode D8 and diode D9 are connected into OR circuit；
FET Q2 source electrode meets secondary ground SGND, and FET Q2 drain electrode connects power output end V- nearby；
It is attempted by after resistance R29+resistance R30, two resistance concatenation between Q2 drain electrode and source electrode.
2. inefficiency according to claim 1 loses the soft starting circuit of power output end Anti-surging, it is characterised 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 partial pressures, are connected on the input positive pole for starting Anti-surging switched-OPAMP U4A, and the another of resistance R25 terminates at secondary ground SGND.
3. inefficiency according to claim 1 loses the soft starting circuit of power output end Anti-surging, it is characterised in that institute
The voltage reference device U3 stated exports transport and placing device U4B to constant pressure and provides 2.495V reference voltages, and it is defeated that the reference voltage is connected on constant pressure
Go out transport and placing device U4B electrode input end, constant pressure output transport and placing device U4B negative input is connected on resistance R22, R23 dividing point,
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。
4. inefficiency according to claim 1 loses the soft starting circuit of power output end Anti-surging, it is characterised in that institute
The negative electrode for stating voltage-regulator diode ZD1 is connected at resistance R31 and electric capacity C13 tie point, and voltage-regulator diode ZD1 anode connects an electricity
Hinder R28.
5. inefficiency according to claim 1 loses the soft starting circuit of power output end Anti-surging, it is characterised in that institute
The resistance for stating resistance R29+resistance R30 is chosen for：Soft start electric current I=output voltage/(R29+ R30).
6. inefficiency according to claim 1 loses the soft starting circuit of power output end Anti-surging, it is characterised in that institute
The voltage reference device U3 stated selects TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621174691.8U CN206533277U (en) | 2016-11-02 | 2016-11-02 | A kind of inefficiency loses the soft starting circuit of power output end Anti-surging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621174691.8U CN206533277U (en) | 2016-11-02 | 2016-11-02 | A kind of inefficiency loses the soft starting circuit of power output end Anti-surging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206533277U true CN206533277U (en) | 2017-09-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621174691.8U Withdrawn - After Issue CN206533277U (en) | 2016-11-02 | 2016-11-02 | A kind of inefficiency loses the soft starting circuit of power output end Anti-surging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300952A (en) * | 2016-11-02 | 2017-01-04 | 东莞市石龙富华电子有限公司 | The soft-start method of a kind of inefficiency loss power output end Anti-surging and circuit |
-
2016
- 2016-11-02 CN CN201621174691.8U patent/CN206533277U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106300952A (en) * | 2016-11-02 | 2017-01-04 | 东莞市石龙富华电子有限公司 | The soft-start method of a kind of inefficiency loss power output end Anti-surging and circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170929 Effective date of abandoning: 20180824 |
|
| AV01 | Patent right actively abandoned |