CN107769535A - A kind of soft-start circuit and power panel and service board comprising the circuit - Google Patents
A kind of soft-start circuit and power panel and service board comprising the circuit Download PDFInfo
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- CN107769535A CN107769535A CN201610701369.4A CN201610701369A CN107769535A CN 107769535 A CN107769535 A CN 107769535A CN 201610701369 A CN201610701369 A CN 201610701369A CN 107769535 A CN107769535 A CN 107769535A
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- triode
- oxide
- semiconductor
- soft
- delay startup
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Classifications
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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
-
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
- Direct Current Feeding And Distribution (AREA)
- Rectifiers (AREA)
- Electronic Switches (AREA)
Abstract
The present invention proposes a kind of soft-start circuit and power panel and service board comprising the circuit, the soft-start circuit, including：Delay startup metal-oxide-semiconductor, delay startup drive control triode and power supply circuit, wherein, power supply circuit is powered to delay startup drive control triode and determines the triode from the delay duration turned off to conducting；Established by cable from power input the beginning, the power supply circuit is powered for the triode and the triode is turned on by the delay duration, starts delay startup metal-oxide-semiconductor during the triode ON；Since power input power down, the power supply circuit stops powering for the triode and the triode is disconnected to close delay startup metal-oxide-semiconductor.The present invention accelerates the velocity of discharge of delay startup metal-oxide-semiconductor grid, solves traditional soft-start circuit caused risk when frequently switching on machine.
Description
Technical field
The present invention relates to communication equipment power supply technique field, more particularly to a kind of soft-start circuit and the electricity comprising the circuit
Source plate and service board.
Background technology
In the case where soft-start circuit is arranged on the service board of communication equipment, communication equipment is required in complete machine not
Service board is changed or restarted in the case of power down, this requires device port current supply circuit to support hot plug work(
Energy；In the case where soft-start circuit is arranged on the power panel of communication equipment, also require that the current supply circuit of power panel supports heat
Plug function.
Existing frequently-used soft-start circuit is shown in Fig. 1, to input power pack in just insertion socket or when changing socket
It is easy to be connected with socket unstable, causes to occur after input power down fast powering-up again, in this case, the big filter of output end
Ripple electric capacity C2 electric discharges are slow, can be charged always to C1, although triode VT1 design original intention is to bleed off the electricity on C1 as early as possible
Amount, due to C1, by diode VD2, slowly electric discharge makes the VT1 could not turn at all, thus C1 can not repid discharge cause slow open
Dynamic metal-oxide-semiconductor VT2 driving voltage can not quickly drop to 0 volt, so that again in the case of quick turn-on, delay startup metal-oxide-semiconductor rises
Less than the slow function of opening, opening state or half opening state are constantly in, such consequence is if delay startup metal-oxide-semiconductor VT2
Just when half opening state input again on establish machine by cable, delay startup metal-oxide-semiconductor can produce great impact electric current and instantaneous
Stress, there is damage risk.The time of the delay startup metal-oxide-semiconductor VT2 wherein emulated driving voltage power down sees Fig. 2, from output end electricity
Pressure Vout suddenly declines and started because of input power down, and delay startup metal-oxide-semiconductor VT2 grid voltages Vgs needs nearly 50ms just to drop to 0
Volt.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of soft-start circuit and power panel and business comprising the circuit
Veneer, realize that delay startup metal-oxide-semiconductor accelerates to close, avoid soft-start circuit caused risk in quick frequent switching on and shutting down.
The technical solution adopted by the present invention is the soft-start circuit, including：Delay startup metal-oxide-semiconductor, delay startup drive control
Triode and power supply circuit, wherein,
Power supply circuit is powered to delay startup drive control triode and determines the triode from the delay turned off to conducting
Duration；
Established by cable from power input the beginning, the power supply circuit is powered for the triode and the triode is passed through institute
State delay duration and turn on, start delay startup metal-oxide-semiconductor during the triode ON；
Since power input power down, the power supply circuit stops powering for the triode and making the triode break
Open to close delay startup metal-oxide-semiconductor.
Further, the power supply circuit, including：First power supply unit and the second power supply unit, wherein, the first power supply
Emitter stage of the unit for the triode in a manner of electric resistance partial pressure, which is powered and provide to delay, opens electric capacity；Second power supply unit is with resistance
Powered with the mode of voltage-stabiliser tube partial pressure for the base stage of the triode；The colelctor electrode of the triode and the delay startup metal-oxide-semiconductor
Grid be connected.
Further, in the first power supply unit, the slow electric capacity that opens is connected across the transistor emitter and base stage
Both ends.
Further, in the second power supply unit, in addition to：The filtering storage capacitor in parallel with voltage-stabiliser tube, in electricity
It is filtered when electric on the input of source and the voltage of the transistor base is maintained in power input power down.
Further, in the second power supply unit, in addition to：Partial pressure electricity for the base stage power supply for the triode
Resistance.
Further, the soft-start circuit, in addition to：It is connected to the colelctor electrode of the triode and the delay startup
Current-limiting resistance between the grid of metal-oxide-semiconductor, for preventing the overcharged voltage of the delay startup metal-oxide-semiconductor grid.
Further, the soft-start circuit, in addition to：It is connected to the colelctor electrode of the triode and the delay startup
Between the source electrode of metal-oxide-semiconductor or drain electrode and for adjusting the divider resistance of the delay startup metal-oxide-semiconductor grid voltage.
Further, the soft-start circuit, in addition to：It is connected to the colelctor electrode of the triode and the delay startup
Voltage-stabiliser tube between the source electrode of metal-oxide-semiconductor or drain electrode.
Further, on power input electricity for and negative voltage in the case of, the triode selects the pole of positive-negative-positive three
Pipe, the delay startup metal-oxide-semiconductor select NPN type delay startup metal-oxide-semiconductor；
In the case that electricity is positive voltage and ground on power input, the triode selects NPN type triode, described slow
Start metal-oxide-semiconductor and select positive-negative-positive delay startup metal-oxide-semiconductor；
The one end on the non-ground of delay startup metal-oxide-semiconductor access.
The present invention also provides a kind of power panel of communication equipment, includes above-mentioned soft-start circuit.
The present invention also provides a kind of service board of communication equipment, and the service board includes above-mentioned slow in mains input side
Start-up circuit.
Using above-mentioned technical proposal, the present invention at least has following advantages：
Soft-start circuit of the present invention and power panel and service board comprising the circuit, accelerate delay startup metal-oxide-semiconductor
The velocity of discharge of grid, solves traditional soft-start circuit caused risk when frequently switching on machine.Main application of the invention
The occasion of machine is frequently switched in input, during dc source veneer frequently hot plugging, can be closed rapidly in power down moment
Delay startup metal-oxide-semiconductor in loop circuit, produced so as to greatly reduce in hot plug process in the slow instantaneous stress opened on MOS and big
Dash current, reduce the probability of delay startup metal-oxide-semiconductor damage, improve the reliability of soft-start circuit.
Brief description of the drawings
Fig. 1 is the soft-start circuit composition schematic diagram of prior art；
Fig. 2 be prior art soft-start circuit in delay startup metal-oxide-semiconductor power-down conditions schematic diagram；
Fig. 3 is the soft-start circuit composition schematic diagram of first embodiment of the invention；
Fig. 4 is the soft-start circuit composition schematic diagram of second embodiment of the invention；
Fig. 5 is the soft-start circuit composition schematic diagram of sixth embodiment of the invention；
Fig. 6 is a physical circuit implementation example schematic diagram of the soft-start circuit of sixth embodiment of the invention；
Fig. 7 emulates schematic diagram for the power down of delay startup metal-oxide-semiconductor in the soft-start circuit of sixth embodiment of the invention.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined purpose is taken, below in conjunction with accompanying drawing
And preferred embodiment, the present invention is described in detail as after.
First embodiment of the invention, a kind of soft-start circuit, soft-start circuit access input power pack and output section
/, as shown in figure 3, the soft-start circuit includes consisting of part：Delay startup metal-oxide-semiconductor 100, delay startup drive control three
Pole pipe 200 and power supply circuit 300, wherein,
Power supply circuit 300 is powered to delay startup drive control triode 200 and determines delay startup drive control triode 200
From shut-off to the delay duration of conducting；
Established by cable from power input the beginning, power supply circuit 300 is powered for delay startup drive control triode 200 and makes to delay and opens
Dynamic drive control triode 200 turns on by the delay duration, starts slow open when delay startup drive control triode 200 turns on
Dynamic metal-oxide-semiconductor 100；
Since power input power down, power supply circuit 300 stops powering and making for delay startup drive control triode 200
Delay startup drive control triode 200 is disconnected to close delay startup metal-oxide-semiconductor 100.
Second embodiment of the invention, a kind of soft-start circuit, soft-start circuit access input power pack and output section
/, as shown in figure 4, the present embodiment is roughly the same with first embodiment, differ only in, the present embodiment further defines
A kind of implementation of power supply circuit：
Power supply circuit 300, including：First power supply unit 301 and the second power supply unit 302, wherein, the first power supply unit
301 emitter stage for delay startup drive control triode 200 in a manner of electric resistance partial pressure, which is powered and provides to delay, opens electric capacity；Second supplies
Electric unit 302 is powered in a manner of resistance and voltage-stabiliser tube partial pressure for the base stage of delay startup drive control triode 200；Delay startup drives
The colelctor electrode of dynamic control triode 200 is connected with the grid of delay startup metal-oxide-semiconductor 100.
Specifically, in the first power supply unit 302, the slow electric capacity that opens is connected across the transistor emitter and base stage
Both ends.
Preferably, in the second power supply unit 302, in addition to：The filtering storage capacitor in parallel with voltage-stabiliser tube, in electricity
It is filtered when electric on the input of source and the voltage of the transistor base is maintained in power input power down.
Preferably, in the second power supply unit 302, in addition to：Partial pressure electricity for the base stage power supply for the triode
Resistance.
Third embodiment of the invention, a kind of soft-start circuit, soft-start circuit access input power pack and output section
/, the present embodiment is roughly the same with second embodiment, differs only in, and the present embodiment carries on the basis of second embodiment
Some preferable implementations are supplied：
Preferably, the soft-start circuit of the present embodiment, in addition to：Be connected to the colelctor electrode of the triode with it is described
Current-limiting resistance between the grid of delay startup metal-oxide-semiconductor, for preventing the overcharged voltage of the delay startup metal-oxide-semiconductor grid.
Preferably, the soft-start circuit of the present embodiment, in addition to：Be connected to the colelctor electrode of the triode with it is described
Between the source electrode of delay startup metal-oxide-semiconductor or drain electrode and for adjusting the divider resistance of the delay startup metal-oxide-semiconductor grid voltage.
Preferably, the soft-start circuit of the present embodiment, in addition to：Be connected to the colelctor electrode of the triode with it is described
Voltage-stabiliser tube between the source electrode of delay startup metal-oxide-semiconductor or drain electrode.
Further, on power input electricity for and negative voltage in the case of, the triode selects the pole of positive-negative-positive three
Pipe, the delay startup metal-oxide-semiconductor select NPN type delay startup metal-oxide-semiconductor；
In the case that electricity is positive voltage and ground on power input, the triode selects NPN type triode, described slow
Start metal-oxide-semiconductor and select positive-negative-positive delay startup metal-oxide-semiconductor；
The one end on the non-ground of delay startup metal-oxide-semiconductor access.
Fourth embodiment of the invention, a kind of power panel of communication equipment, include the delay startup first and second or three in embodiment
Circuit.
Fifth embodiment of the invention, a kind of service board of communication equipment, the service board include in mains input side
First and second or three soft-start circuits in embodiment.
Sixth embodiment of the invention, the present embodiment are on the basis of above-described embodiment, and one is introduced with reference to accompanying drawing 5~7
The application example of the present invention.
The embodiment of the present invention uses the soft-start circuit in Fig. 5, main to include following several parts：
A：Delay startup metal-oxide-semiconductor；
B：Delay startup drive control part --- -- triode；
C：Drive control circuit b poles power pack；
D：Drive control circuit e poles power pack.
C and D powers to b the and e poles of part B triode, for controlling the turn-on and turn-off of part B triode, and part B
The turn-on and turn-off of triode directly control the grid voltage of delay startup metal-oxide-semiconductor so as to realize the function of traditional delay startup,
But the present invention with traditional circuit difference be input power down when, the grid of delay startup metal-oxide-semiconductor does not have electric capacity, passes through
The grid voltage of delay startup metal-oxide-semiconductor can drop to 0V rapidly after part B circuit.
One physical circuit implementation example of the embodiment of the present invention as shown in fig. 6, including but this unlimited figure in drawn PNP
Triode, resistance capacitance quantity etc..Wherein VT2 is delay startup metal-oxide-semiconductor, and VT1 constitutes part B；
R1, VD1, C1, R4 and R5 constitute C portion；Wherein, necessary part is for B b poles in a manner of partial pressure
The the first divider resistance R1 and the first voltage-stabiliser tube VD1 of power supply, it is preferred that be also added into filtering storage capacitor C1 and for B
B poles the 4th divider resistance R4 and the 5th divider resistance R5 of suitable potential matched with e poles is provided.
R2, R3, C2, C3, VD2 and VD3 etc. constitute D three parts, wherein, necessary part is the second divider resistance
R2 and the 3rd divider resistance R3 and second is slow to open that electric capacity C2 or the 3rd is slow to open electric capacity C3, it is preferred that is also added into the second voltage stabilizing
Pipe VD2 and the 3rd voltage-stabiliser tube VD3, for preventing the damage of backward voltage degree circuit.
The soft-start circuit of the present embodiment can allow VT2 to play the slow effect of opening and allow VT2 grid repid discharges.Its work
Schematic diagram is as follows：
1) when input is upper electric, R1 is first passed through, VD1 and C1 is charged, then C2 and C3 is charged by R2, R3；
2) when being charged to the pole tensions of be two for meeting VT1 and reaching cut-in voltage, VT1 conductings；
3) after VT1 conductings, VT2 gs terminal voltages are established, VT2 conductings, complete the function of delay startup；
4) when inputting power down, VT1 b poles are powered by R1 and voltage-stabiliser tube VD1, even if input voltage fall it is very low, also can be after
The continuous voltage for maintaining Vb, keep Vb voltages constant；
5) VT1 e poles are powered by R2 and R3 partial pressures, and with the reduction of input voltage, e pole tensions also decrease, in b poles
Voltage is constant, and in the case that e pole tensions reduce, the pole tensions of be two are dropped to below cut-in voltage quickly, so that VT1 is closed；
6) after VT1 is closed, VT2 grid does not have electric capacity, so also wink prompt drop to 0, allows VT2 to be not turned on to VT2 grid voltages,
So as to close soft-start circuit rapidly, the simulation result of accompanying drawing 7 is seen.
The simulation waveform of comparison diagram 2 and Fig. 7, it is evident that Fig. 7 Vgs voltage drops are quickly.
Not only circuit is simple, cost is low, reliability is high by the present invention, and mainly solves to lead back in traditional soft-start circuit
The problem of road metal-oxide-semiconductor electric discharge is slow, has application prospect and value, there is novelty.
It is only the preferred exemplary of the present invention described in figure 4 above, is not intended to limit the invention, for this area
Technical staff for, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made appoints
What modification, equivalent substitution, improvement etc., should be included in the scope of the protection.
By the explanation of embodiment, should can to the present invention for reach technological means that predetermined purpose is taken and
Effect is able to more go deep into and specific understanding, but appended diagram is only to provide reference and purposes of discussion, not for this
Invention is any limitation as.
Claims (11)
- A kind of 1. soft-start circuit, it is characterised in that including：Delay startup metal-oxide-semiconductor, delay startup drive control triode and power supply electricity Road, wherein,Power supply circuit is powered to delay startup drive control triode and determines the triode from the delay duration turned off to conducting；Established by cable from power input the beginning, the power supply circuit is that the triode is powered and makes to prolong described in the triode process Slow duration and turn on, start delay startup metal-oxide-semiconductor during the triode ON；Since power input power down, the power supply circuit stop power for the triode and make the triode disconnection with Close delay startup metal-oxide-semiconductor.
- 2. soft-start circuit according to claim 1, it is characterised in that the power supply circuit, including：First power supply unit And second power supply unit, wherein, the first power supply unit in a manner of electric resistance partial pressure for the triode emitter stage power supply simultaneously There is provided to delay and open electric capacity；Second power supply unit is powered in a manner of resistance and voltage-stabiliser tube partial pressure for the base stage of the triode；It is described The colelctor electrode of triode is connected with the grid of the delay startup metal-oxide-semiconductor.
- 3. soft-start circuit according to claim 2, it is characterised in that described slow to open electric capacity in the first power supply unit It is connected across the both ends of the transistor emitter and base stage.
- 4. soft-start circuit according to claim 1, it is characterised in that in the second power supply unit, in addition to：With voltage stabilizing Pipe filtering storage capacitor in parallel, for being filtered when electric on power input and being maintained in power input power down The voltage of the transistor base.
- 5. soft-start circuit according to claim 4, it is characterised in that in the second power supply unit, in addition to：For for The divider resistance of the base stage power supply of the triode.
- 6. soft-start circuit according to claim 2, it is characterised in that the soft-start circuit, in addition to：It is connected to institute The current-limiting resistance between the colelctor electrode of triode and the grid of the delay startup metal-oxide-semiconductor is stated, for preventing the delay startup metal-oxide-semiconductor The overcharged voltage of grid.
- 7. soft-start circuit according to claim 2, it is characterised in that the soft-start circuit, in addition to：It is connected to institute State between the colelctor electrode of triode and the source electrode of the delay startup metal-oxide-semiconductor or drain electrode and for adjusting the delay startup metal-oxide-semiconductor grid The divider resistance of pole tension.
- 8. soft-start circuit according to claim 2, it is characterised in that the soft-start circuit, in addition to：It is connected to institute State the voltage-stabiliser tube between the colelctor electrode of triode and the source electrode of the delay startup metal-oxide-semiconductor or drain electrode.
- 9. according to soft-start circuit according to any one of claims 1 to 8, it is characterised in that electricity is on power input In the case of ground and negative voltage, the triode selects PNP type triode, and the delay startup metal-oxide-semiconductor selects NPN type delay startup Metal-oxide-semiconductor；In the case that electricity is positive voltage and ground on power input, the triode selects NPN type triode, the delay startup Metal-oxide-semiconductor selects positive-negative-positive delay startup metal-oxide-semiconductor；The one end on the non-ground of delay startup metal-oxide-semiconductor access.
- 10. a kind of power panel of communication equipment, it is characterised in that include delay startup such as according to any one of claims 1 to 9 Circuit.
- 11. a kind of service board of communication equipment, it is characterised in that the service board includes right such as in mains input side will Seek the soft-start circuit any one of 1~9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701369.4A CN107769535B (en) | 2016-08-22 | 2016-08-22 | Slow starting circuit, power panel comprising same and service single board |
| PCT/CN2017/096053 WO2018036370A1 (en) | 2016-08-22 | 2017-08-04 | Soft start circuit, and power board and service single board having same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610701369.4A CN107769535B (en) | 2016-08-22 | 2016-08-22 | Slow starting circuit, power panel comprising same and service single board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107769535A true CN107769535A (en) | 2018-03-06 |
| CN107769535B CN107769535B (en) | 2021-03-30 |
Family
ID=61245479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610701369.4A Active CN107769535B (en) | 2016-08-22 | 2016-08-22 | Slow starting circuit, power panel comprising same and service single board |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107769535B (en) |
| WO (1) | WO2018036370A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067161A (en) * | 2018-08-09 | 2018-12-21 | 中国铁道科学研究院集团有限公司 | A kind of power safety activation system |
| CN109245749A (en) * | 2018-12-05 | 2019-01-18 | 博为科技有限公司 | A kind of delay switch circuit of reactance voltage fluctuation |
| CN109672434A (en) * | 2018-12-24 | 2019-04-23 | 优数通（北京）科技有限公司 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
| CN109767715A (en) * | 2019-03-11 | 2019-05-17 | 京东方科技集团股份有限公司 | Soft-start circuit, integrated power supply management circuit and display equipment |
| CN113346737A (en) * | 2021-04-29 | 2021-09-03 | 山东英信计算机技术有限公司 | Adjustable delay circuit, delay circuit system and method |
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| CN108631572A (en) * | 2018-06-28 | 2018-10-09 | 深圳振华富电子有限公司 | Power supply delay startup module and electronic equipment |
| CN109995354B (en) * | 2019-05-08 | 2024-04-09 | 博为科技有限公司 | Voltage fluctuation resistant delay switch circuit based on rising edge sampling |
| CN110481353B (en) * | 2019-08-13 | 2021-08-10 | 科华恒盛股份有限公司 | Direct-current slow start device and method |
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| CN109245749B (en) * | 2018-12-05 | 2024-01-30 | 博为科技有限公司 | Voltage fluctuation resistant delay switch circuit |
| CN109672434A (en) * | 2018-12-24 | 2019-04-23 | 优数通（北京）科技有限公司 | A kind of automobile electronic controller supply voltage delay unlatching protection circuit |
| CN109767715A (en) * | 2019-03-11 | 2019-05-17 | 京东方科技集团股份有限公司 | Soft-start circuit, integrated power supply management circuit and display equipment |
| CN113346737A (en) * | 2021-04-29 | 2021-09-03 | 山东英信计算机技术有限公司 | Adjustable delay circuit, delay circuit system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2018036370A1 (en) | 2018-03-01 |
| CN107769535B (en) | 2021-03-30 |
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