CN109067161A - A kind of power safety activation system - Google Patents
A kind of power safety activation system Download PDFInfo
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- CN109067161A CN109067161A CN201810901314.7A CN201810901314A CN109067161A CN 109067161 A CN109067161 A CN 109067161A CN 201810901314 A CN201810901314 A CN 201810901314A CN 109067161 A CN109067161 A CN 109067161A
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- 230000004913 activation Effects 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims description 38
- 239000003990 capacitor Substances 0.000 claims description 20
- 230000005611 electricity Effects 0.000 claims description 15
- 238000012360 testing method Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000003111 delayed effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 2
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
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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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC 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
- 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
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with digital control
-
- 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
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention provides a kind of power safety activation system, which includes: switching circuit, discharge circuit and soft starting circuit；Switching circuit is connected between power supply and external equipment, and discharge circuit is connect with power supply and switching circuit, and soft starting circuit is connect with switching circuit and external equipment；Switching circuit includes first switch tube and second switch；First switch tube is connect with power supply, discharge circuit and soft starting circuit, and second switch is connect with discharge circuit and external equipment；When power input voltage reaches the cut-in voltage of discharge circuit, discharge circuit control first switch tube and second switch are connected in default first delay time, so that external equipment is discharged by second switch；After the first delay time, discharge circuit controls first switch tube and second switch disconnects；After default second delay time, soft starting circuit controls its third switching tube and is gradually connected, and powers so that power supply is done step-by-step to external equipment.
Description
Technical field
The present invention relates to power initiation field, espespecially a kind of power safety activation system.
Background technique
With the development of science and technology, electronic technology is grown rapidly, and electronics categories are more and more abundant, in the mankind
Irreplaceable role is played in life.It is also less identical to the reliability requirement of product with the difference of product use environment.
The power up of one electronic system is very big to the reliability effect of product.For example, some electronic products using when need soft open
It is dynamic, to protect electronic product on startup not by the impact of surge.Some equipment is used for industrial scene, and use environment compares
Badly, especially more equipment concentrate spread of voltage in the start-up course powered on, then need delayed startup to circumvent shakiness at this time
Determine process, while to detect voltage fluctuation, then must effectively be resetted if there is undervoltage condition.There are many technologies at present
Delayed startup or soft start are realized using discrete device, are also occurred some integrated chips with advances in technology and are realized soft open
It is dynamic.However the clean boot of equipment will not only escape surge and voltage instability, the abundant power down before starting is also very crucial, and single
One chip is not able to satisfy a variety of applications.
Summary of the invention
In order to solve the problems, such as that current device power process not can be implemented simultaneously soft start, delay and sufficiently power down etc., this
Invention provides a kind of power safety activation system, and the power safety activation system includes: switching circuit, discharge circuit and soft opens
Dynamic circuit；The switching circuit is connected between power supply and external equipment, the discharge circuit and the power supply and the switch
Circuit connection, the soft starting circuit are connect with the power supply, the switching circuit and the external equipment；
The switching circuit includes first switch tube and second switch；It is the first switch tube and the power supply, described
Discharge circuit and soft starting circuit connection, the second switch and the power supply, the discharge circuit and the outside
Equipment connection；
After the electric power starting, when power input voltage reaches the cut-in voltage of the discharge circuit, the electric discharge
First switch tube described in circuit control and the second switch are connected in default first delay time, so that the outside is set
For in first delay time, discharged by the second switch；
After first delay time, the discharge circuit controls the first switch tube and second switch is disconnected
It opens；
After default second delay time, the soft starting circuit controls its third switching tube and is gradually connected, so that institute
Power supply is stated to be done step-by-step to external equipment power supply.
Optionally, in an embodiment of the present invention, the system also includes filter circuit, the filter circuit and the electricity
Source, the discharge circuit and soft starting circuit connection.
Optionally, in an embodiment of the present invention, the grid of the grid of the first switch tube and the second switch,
The discharge circuit and power supply connection, the drain electrode of the first switch tube are connect with the soft starting circuit, and described first
The source electrode of switching tube is grounded.
Optionally, in an embodiment of the present invention, the source electrode ground connection of the second switch, the leakage of the second switch
Pole is connect with the external equipment；When the second switch conducting when, the external equipment by the second switch to
It discharges on ground.
Optionally, in an embodiment of the present invention, the switching circuit further includes the 4th switching tube, the 4th switching tube
Source electrode ground connection, drain electrode and the grid of the first switch tube and the grid of the second switch of the 4th switching tube connect
It connects, the grid of the 4th switching tube is connect with the discharge circuit.
Optionally, in an embodiment of the present invention, the discharge circuit controls the 4th switching tube and prolongs described first
When the time in disconnect so that the first switch tube and second switch are connected in first delay time.
Optionally, in an embodiment of the present invention, first voltage detection module and reset controller；The voltage detecting mould
Block is connect with the power supply and the reset controller, for detecting whether the power input voltage reaches the discharge circuit
Cut-in voltage；The reset controller is connect with the grid of the 4th switching tube, for controlling the 4th switching tube
It disconnects or is connected.
Optionally, in an embodiment of the present invention, the reset controller includes resetting output pin, the reset output
Pin is connect with the grid of the 4th switching tube；The reset controller passes through reset output pin control the described 4th
The disconnection or conducting of switching tube.
Optionally, in an embodiment of the present invention, the first voltage detection module includes: the first divider resistance and first
Delay capacitor；First divider resistance is for detecting the power input voltage；First delay capacitor is for being arranged institute
State the first delay time.
Optionally, in an embodiment of the present invention, the soft starting circuit further include: second voltage detection module, electric current
Detection module and soft start controller；It the second voltage detection module and the switching circuit, the power supply and described soft opens
Movement controller connection, detects the cut-in voltage whether power input voltage reaches the soft starting circuit；The electric current inspection
It surveys module to connect with the third switching tube, the power supply and the soft start controller, for detecting mains input current simultaneously
The mains input current that will test is sent to the soft start controller；The soft start controller and the third switching tube
Connection, for controlling the disconnection or conducting of the third switching tube according to the mains input current.
Optionally, in an embodiment of the present invention, the second voltage detection module includes: the second divider resistance and second
Delay capacitor；Second divider resistance is for detecting the power input voltage；Second delay capacitor is for being arranged institute
State the second delay time.
Optionally, in an embodiment of the present invention, the cut-in voltage of the soft starting circuit is higher than the discharge circuit
Cut-in voltage.
Optionally, in an embodiment of the present invention, the grid of the third switching tube is connect with the soft start controller,
The source electrode of the third switching tube is connect with the external equipment, the drain electrode of the third switching tube and the current detection module
Connection.
Optionally, in an embodiment of the present invention, the soft start controller includes: that soft start output pin and switch draw
Foot, the soft start output pin are connect with the grid of the third switching tube；The switch pin passes through the second voltage
Detection module is connect with the drain electrode of the first switch tube.
The present invention realizes delayed startup, soft start, starting pre-arcing function, fully ensures that and opens in the safety of different occasions
It is dynamic.It joined the active discharge process of a period of time, in the start-up course of power supply to guarantee after external equipment is substantially discharged again
Starting avoids because starting timing entanglement problem caused by charge accumulated.Delayed startup function can be clever according to the actual situation
Adjustment start-up time delay living, in order to the unstable situation of the power supply for the initial start stage that is staggered.It can be passed through by soft start control
Limiting starting current, inhibit due to load capacitance it is excessive caused by surge effect and supply voltage is dragged down.It is achieved in starting
Process is safer, and coverage area is wider.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of power safety activation system of the embodiment of the present invention；
Fig. 2 is the power safety activation system circuit diagram of a specific embodiment of the invention；
Fig. 3 is the power safety activation system circuit diagram of another specific embodiment of the present invention；
Fig. 4 is a kind of timing diagram of power safety activation system of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention provides a kind of power safety activation system.
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 description, 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, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It is as shown in Figure 1 a kind of structural schematic diagram of power safety activation system of the embodiment of the present invention, power supply as shown in the figure
Secure startup system includes: switching circuit 11, discharge circuit 12 and soft starting circuit 13；The switching circuit 11 is connected to power supply
Between external equipment, the discharge circuit 12 is connect with the power supply and the switching circuit 11, the soft starting circuit 13
It is connect with the power supply, the switching circuit 11 and the external equipment；
The switching circuit 11 includes first switch tube and second switch；The first switch tube and the power supply, institute
It states discharge circuit 12 and the soft starting circuit 13 connects, the second switch and the power supply, the discharge circuit and institute
State external equipment connection；
It is described to put when power input voltage reaches the cut-in voltage of the discharge circuit 12 after the electric power starting
Circuit 12 controls the first switch tube and the second switch and is connected in default first delay time, so that described outer
Portion's equipment is discharged in first delay time by the second switch；
After first delay time, the discharge circuit 13 controls the first switch tube and second switch is disconnected
It opens；
After default second delay time, the soft starting circuit 13 controls its third switching tube and is gradually connected, so that
The power supply is done step-by-step to the external equipment and powers.
In the present embodiment, power safety activation system is connected between power supply and external equipment.In power up, electricity
After the input of source, discharge circuit 12 reaches cut-in voltage first and works.First in 12 control switch circuit 11 of discharge circuit
Switching tube is connected with second switch, and turn-on time is preset first delay time.In the first delay time, outside is set
It is standby to be discharged by second switch to ground, with this avoid due in external equipment there are residual charge, when caused starting
Sequence entanglement problem.
In the first delay time, after external equipment is sufficiently discharged residual charge by second switch, electric discharge
Circuit 12 controls first switch tube and second switch disconnects, and external equipment stops electric discharge.After first switch tube disconnection, and electricity
When the output voltage in source reaches the cut-in voltage of soft starting circuit 13, soft starting circuit is started to work, using preset second
After delay time, soft starting circuit 13 starts soft start-up process.Third switching tube is equipped in soft starting circuit 13, in soft start electricity
After road 13 starts soft start-up process, control third switching tube is gradually turned on.By soft start-up process, power supply is gradually to external equipment
Power supply can realize that power good is powered to external equipment to avoid occurring surge effect in system.
Wherein, in order to guarantee that soft starting circuit 13 does not export in the first delay time, the first delay time is greater than
Two delay times.
As an embodiment of the present invention, power safety activation system further includes filter circuit 14, filter circuit 14 with
Power supply, discharge circuit 12 and soft starting circuit 11 connect.Filter circuit 14 is for being filtered mains input current.
As an embodiment of the present invention, the grid of first switch tube and the grid of second switch, discharge circuit 12
And power supply connection, the drain electrode of first switch tube are connect with soft starting circuit 13, the source electrode ground connection of first switch tube.Wherein, it switchs
Pipe can be such as field-effect tube, then, switching tube includes source electrode, grid and drain electrode.Discharge circuit 12 by with first switch
The grid of pipe and the grid connection of second switch, control the on-off of first switch tube and second switch.
As an embodiment of the present invention, the source electrode ground connection of second switch, drain electrode and the outside of second switch are set
Standby connection；When second switch conducting, external equipment is discharged by second switch to ground.Wherein, in discharge circuit
When 12 control second switch conducting, external equipment is discharged by the source electrode of second switch to ground.
As an embodiment of the present invention, switching circuit 11 further includes the 4th switching tube, and the source electrode of the 4th switching tube connects
Ground, the drain electrode of the 4th switching tube and the grid of first switch tube and the connection of the grid of second switch, the grid of the 4th switching tube
It is connect with discharge circuit 12.
In the present embodiment, discharge circuit 12 controls the 4th switching tube and disconnects in the first delay time, so that the
One switching tube and second switch are connected in the first delay time.
Wherein, when being not required to four switching tubes, discharge circuit 12 is connect with the grid of first switch tube and second switch
Effective output at place is high level.If discharge circuit 12 is effective defeated with the grid junction of first switch tube and second switch
It is out low level, then, in the first delay time, discharge circuit 12 with the 4th switch tube grid by connecting, control the 4th
Switching tube disconnects, and realizes control first switch tube and second switch conducting with this.
In the present embodiment, discharge circuit 12 includes: first voltage detection module and reset controller；Voltage detection module
It is connect with power supply and reset controller, the cut-in voltage of discharge circuit 12 whether is reached for detecting power input voltage；It resets
Controller is connect with the grid of the 4th switching tube, for controlling the disconnection or conducting of the 4th switching tube.
Wherein, reset controller includes resetting output pin, resets output pin and connect with the grid of the 4th switching tube；It is multiple
Level controller controls the disconnection or conducting of the 4th switching tube by resetting output pin.At this point, the reset of reset controller
Effective output of output pin is low level.It, should when effective output of the reset output pin of reset controller is high level
Resetting output pin can directly connect with the grid of first switch tube and two switching tubes.
In addition, first voltage detection module includes: the first divider resistance and the first delay capacitor；First divider resistance is used for
Detect power input voltage；First delay capacitor is for being arranged the first delay time.First divider resistance includes two resistance, with
This realizes partial pressure.Pass through the different resistance value of two resistance of setting, the cut-in voltage of settable different discharge circuit 12.When power supply is defeated
When entering voltage and reaching the cut-in voltage, discharge circuit 12 is started to work.It, can by the way that the different capacitances of the first delay capacitor are arranged
It realizes and the first different delay times is set.
As an embodiment of the present invention, soft starting circuit 13 further include: second voltage detection module, current detecting mould
Block and soft start controller；Second voltage detection module is connect with switching circuit 11, power supply and soft start controller, detects power supply
Whether input voltage reaches the cut-in voltage of soft starting circuit；Current detection module and third switching tube, power supply and soft start control
Device processed connection, for detecting mains input current and the mains input current that will test is sent to soft start controller；It is soft to open
Movement controller is connect with third switching tube, for controlling the disconnection or conducting of third switching tube according to mains input current.
Wherein, current detection module can detecte the size of current in current power supply line, i.e., electric power outputting current is big
It is small.The current value that soft starting circuit 13 is sent by current detection module, the degree of control third switching tube conducting, is realized with this
Soft start.
In the present embodiment, second voltage detection module includes: the second divider resistance and the second delay capacitor；Second partial pressure
Resistance is for detecting power input voltage；Second delay capacitor is for being arranged the second delay time.Second divider resistance includes two
A resistance realizes partial pressure with this.Pass through the different resistance value of two resistance of setting, the unlatching electricity of settable different soft starting circuit 13
Pressure.When power input voltage reaches the cut-in voltage, soft starting circuit 13 is started to work.Pass through the second delay capacitor of setting
Different capacitances are, it can be achieved that be arranged the second different delay times.
Wherein, the cut-in voltage of soft starting circuit 13 is higher than the cut-in voltage of discharge circuit 12.In order to guarantee to power on
Cheng Zhong, discharge circuit 12 can work prior to soft starting circuit 13, and the cut-in voltage of discharge circuit 12 will be lower than soft start
The cut-in voltage of circuit 13.
In the present embodiment, the grid of third switching tube is connect with soft start controller, the source electrode of third switching tube and outer
The connection of portion's equipment, the drain electrode of third switching tube are connect with current detection module.
Wherein, soft start controller includes: soft start output pin and switch pin, and soft start output pin is opened with third
Close the grid connection of pipe；Switch pin is connected by the drain electrode of second voltage detection module and first switch tube.In first switch
When pipe disconnects, the switch pin of soft start controller is raised, and soft start controller is started to work at this time.In soft start controller
After start-up operation, soft start controller controls the output of soft start output pin according to electric power outputting current, controls third with this
Switching tube is gradually turned on.After the conducting of third switching tube, power supply directly passes through third switching tube and powers to external equipment.
The main three parts of power safety activation system of the invention: switching circuit, soft starting circuit and discharge circuit.Its
In, it is contained inside soft starting circuit voltage detecting circuit (second voltage detection module), current detection circuit, switch control electricity
Road (third switching tube), delay startup circuit (second voltage detection module) and main control logic (soft start controller).
Wherein main control logic can be used as an integrated chip completion, current detection circuit and ON-OFF control circuit and supply lines
Road is linked into main control logic while connection.Wherein voltage detecting circuit is joined for obtaining input voltage value with inside
It examines voltage to compare, controller cutting output can be closed when finding electric voltage exception.Current detection circuit is by detecting main power supply
The current conditions in circuit, in order to realize soft start according to the situation control switch of electric current.Discharge circuit part includes prolonging again
When start-up circuit and voltage detecting circuit (first voltage detection module) and control circuit (reset controller).Control circuit
Mainly include reset chip, arranges in pairs or groups external switching circuit to realize electric discharge and reset function.It will by switching circuit after starting
Board is grounded to be substantially discharged for electrical measurement.Delay disconnects discharge path after a certain period of time.If in addition input terminal detects
Output reset signal is resetted system by Voltage Drop.The output of soft starting circuit and discharge circuit structure in reseting procedure in order to prevent
At short circuit, the reset outlet side of discharge circuit will simultaneously close off soft starting circuit cutting power switch.
It is illustrated in figure 2 the power safety activation system circuit diagram of a specific embodiment of the invention, D1 and C1 as shown in the figure
Constitute filter circuit；Soft starting circuit: hot-swapping controller is soft start controller, wherein Gate is that soft start output is drawn
Foot, ON are switch pin, and R1 constitutes current detection module, and Q3 is third switching tube, and R5, R7, C5 and C4 constitute the second electricity
Press detection module, wherein C5 is the second delay capacitor, and R5 and R7 are the second divider resistance；Discharge circuit: reset chip is to reset
Controller, wherein RST is to reset output pin, and R11, R12, C9 and C10 constitute first voltage detection module, wherein C9 the
One delay capacitor, R11 and R12 are the first divider resistance；Switching circuit: R8, R9, R10, Q1 and Q2 constitute switching circuit,
In, Q1 is first switch tube, and Q2 is second switch.
In the present embodiment, soft starting circuit uses a hot-swapping controller, and discharge circuit is using reset IC chip.Electricity
Source inputs Vcc by protection diode D1 to ground, and to system power supply after filter capacitor C1, power supply circuit is divided into two branches
A and B.A branch series resistance R1 and Q3 (NMOS) arrive power output end C.The left and right ends of R1 are coupled with hot-swapping controller
Vcc and Sense pin, for detecting supply current.The grid of Q3 connects the Gate pin of hot-swapping controller.Gate pin can
Supply current control is realized to control the on-off of Q3.The switch pin (ON/OFF) of hot-swapping controller is by R5 and R7 to Vcc points
Pressure obtains.Hot-swapping controller will have delay start function, and the time of delay is adjusted by external capacitor C5 over the ground.
B branch of powering accesses discharge circuit, and discharge circuit resets IC by one and controls, and B branch accesses multiple after C8 is filtered
The Vdd energization pins of position IC, the power supply of B branch are connected to the SENSE pin of reset chip, Sense by R11 and R12 series connection partial pressure
Pin is filtered over the ground by C10.Reset chip will have delayed startup function, and the time of delay passes through external electricity over the ground
Hold C9 to adjust.The reset output pin (RST) of reset chip is connected to the grid (D point) of Q1 and Q2, wherein D point one electricity of series connection
Resistance R9 is connected to power supply Vcc, and D point is connected to Q2 grid by series connection R10, and the source electrode of Q1 and Q2 are grounded respectively.The drain electrode of Q1 is connected to heat
The drain electrode of the switch pin of swap controller, Q2 is connected to power supply output end C point by the R8 that connects.
During the work time, it first has to adjust respective divider resistance according to the characteristic of hot-swapping controller and reset chip
R5,R7,R11,R12.Guarantee discharge circuit cut-in voltage Vt1 be less than soft starting circuit cut-in voltage Vt2, adjustment C5 and
C9 size makes two-part delay time in suitable range, it is assumed that is respectively T1 and T2.In power up, discharge circuit
Control chip work first, RST pin is high always within time T1, Q2 closure, C point is grounded by R8 at this time, at this time
If in external equipment with the presence of charge if will do it and discharge over the ground.Reducing R8 may be implemented quick discharge operation.T1's sets
It is abundant to set power down to be guaranteed.During T1, Q1 is also closed so that hot-swapping controller ON/OFF pin is lasting low, so hot plug
The Gate pin of controller keeps low, and Q3 is off-state.So being in the discharge condition before powering in T1 procedures system.T1 mistake
Afterwards, RST is dragged down, and D point is low level, and Q1 and Q2 are disconnected, and ON pin gets higher level, and hot-swapping controller is started to work at this time, etc.
After the T2 moment, hot-swapping controller starts to control Gate pin high level Q3 realization voltage output is connected, until system is steady
It is fixed.There is soft start control function, i.e. controller can move tune section by detecting the electric current of R1 inside hot-swapping controller
The voltage of Gate is to control electric current no more than scheduled current value.It thus can effectively inhibit the surge electricity of startup stage
Stream reduces the impact to system.
During power down, soft starting circuit can close power switch Q3 first it is detected that Voltage Drop immediately.It puts at this time
Circuit power supply due to the presence of capacitor can be of short duration work, and voltage drop as low as can export electric discharge immediately after Sense voltage
Movement, until supply voltage deficiency.
It is illustrated in figure 3 the power safety activation system circuit diagram of another specific embodiment of the present invention, it is shown in figure multiple
Effective output of position output pin is #RST, and as low level is effective.At this point, further comprising the 4th switching tube in switching circuit
Q4.The reset output pin (#RST) of reset chip is connected to the grid of Q4, the source ground connection of Q4, and drain terminal (D point) connects the grid of Q1
Pole, the D point resistance R9 that connects are connected to power supply Vcc, and D point is connected to Q2 grid by series connection R10, and the source electrode of Q2 and Q3 connect respectively
Ground.The control chip of power up at this time, discharge circuit works first, and #RST pin is low always within time T1, and Q4 is disconnected,
And Q2 closure, Q1 are also closed.After T1, #RST is drawn high, Q4 closure, and D point is low level, and Q1 and Q2 are disconnected, and ON pin gets higher electricity
It is flat.At this time hot-swapping controller start to work, wait the T2 moment after, hot-swapping controller start control Gate pin high level with
Q3 is connected and realizes voltage output, until system is stablized.
It is illustrated in figure 4 a kind of timing diagram of power safety activation system of the embodiment of the present invention, specifically, shown in Fig. 4
For corresponding diagram 3 power safety activation system power on during power down, the # of the tie point of A branch and B branch, reset chip
The timing diagram of the Gate pin of RST pin and hot-swapping controller.Figure 4, it is seen that system is before powering on, A branch and B
The Gate pin of the tie point of branch, the #RST pin of reset chip and hot-swapping controller is low-voltage.In power up
In, A branch and the voltage of the tie point of B branch are gradually increasing, and discharge circuit is started to work after the t1 moment reaches cut-in voltage,
The #RST pin of reset chip becomes high level at the t3 moment, that is, powers on the discharge process started between the t3 moment being system,
External equipment discharges via the switching tube in switching circuit to ground, then, t1~t3 is the first delay time of discharge circuit.It is soft
Start-up circuit reaches cut-in voltage at the t2 moment, due to the hot-swapping controller of switching tube and soft starting circuit in switching circuit
Switch pin connection, soft starting circuit can not get started work.Soft starting circuit is started to work at the t3 moment, and t3~t4 is soft
Second delay time of start-up circuit.After the second delay time, soft starting circuit starts soft start-up process, and Gate pin is short
Voltage is gradually increasing in time, so that power switch pipe (third switching tube) is gradually connected.During power down, soft starting circuit
At the t5 moment first it is detected that Voltage Drop, turns off the switch pipe so that power outage.Discharge circuit is powered due to capacitor
In the presence of, work that can be of short duration between t5~t6, and voltage drop is as low as can be immediately after the Sense pin voltage of hot-swapping controller
Discharging action is exported, until supply voltage deficiency.
Voltage security activation system through the invention realizes delayed startup, soft start, starting pre-arcing function, sufficiently
Guarantee the clean boot in different occasions.It joined the active discharge process of a period of time, in the start-up course of power supply to protect
Card external equipment is restarted after being substantially discharged, and avoids because starting timing entanglement problem caused by charge accumulated.Delayed startup
Start-up time delay can be adjusted flexibly in function according to the actual situation, in order to the unstable situation of the power supply for the initial start stage that is staggered.
By soft start control can by limiting starting current, inhibit due to load capacitance it is excessive caused by surge effect and will power
Voltage pull-down.It is safer to be achieved in start-up course, coverage area is wider.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (14)
1. a kind of power safety activation system, which is characterized in that the power safety activation system includes: switching circuit, electric discharge
Circuit and soft starting circuit；The switching circuit is connected between power supply and external equipment, the discharge circuit and the power supply
And the switching circuit connection, the soft starting circuit are connect with the power supply, the switching circuit and the external equipment；
The switching circuit includes first switch tube and second switch；The first switch tube and the power supply, the electric discharge
Circuit and soft starting circuit connection, the second switch and the power supply, the discharge circuit and the external equipment
Connection；
After the electric power starting, when power input voltage reaches the cut-in voltage of the discharge circuit, the discharge circuit
It controls the first switch tube and the second switch to be connected in default first delay time, so that the external equipment exists
In first delay time, discharged by the second switch；
After first delay time, the discharge circuit controls the first switch tube and second switch disconnects；
After default second delay time, the soft starting circuit controls its third switching tube and is gradually connected, so that the electricity
Source is done step-by-step to the external equipment and powers.
2. power safety activation system according to claim 1, which is characterized in that the system also includes filter circuit,
The filter circuit is connect with the power supply, the discharge circuit and the soft starting circuit.
3. power safety activation system according to claim 1, which is characterized in that the grid of the first switch tube and institute
Grid, the discharge circuit and the power supply connection of second switch are stated, the drain electrode of the first switch tube soft is opened with described
Dynamic circuit connection, the source electrode ground connection of the first switch tube.
4. power safety activation system according to claim 1, which is characterized in that the source electrode of the second switch connects
Ground, the drain electrode of the second switch are connect with the external equipment；When second switch conducting, the external equipment
It is discharged by the second switch to ground.
5. power safety activation system according to claim 1, which is characterized in that the switching circuit further includes the 4th opening
Guan Guan, the source electrode ground connection of the 4th switching tube, grid and institute of the drain electrode of the 4th switching tube with the first switch tube
The grid connection of second switch is stated, the grid of the 4th switching tube is connect with the discharge circuit.
6. power safety activation system according to claim 5, which is characterized in that the discharge circuit control the described 4th
Switching tube disconnects in first delay time, so that the first switch tube and second switch are in the described first delay
Interior conducting.
7. power safety activation system according to claim 6, which is characterized in that the discharge circuit includes: the first electricity
Press detection module and reset controller；
The voltage detection module is connect with the power supply and the reset controller, is for detecting the power input voltage
The no cut-in voltage for reaching the discharge circuit；
The reset controller is connect with the grid of the 4th switching tube, for controlling the disconnection of the 4th switching tube or leading
It is logical.
8. power safety activation system according to claim 7, which is characterized in that the reset controller includes that reset is defeated
Pin out, the reset output pin are connect with the grid of the 4th switching tube；The reset controller passes through the reset
Output pin controls the disconnection or conducting of the 4th switching tube.
9. power safety activation system according to claim 7, which is characterized in that the first voltage detection module packet
It includes: the first divider resistance and the first delay capacitor；
First divider resistance is for detecting the power input voltage；
First delay capacitor is for being arranged first delay time.
10. power safety activation system according to claim 1, which is characterized in that the soft starting circuit further include: the
Two voltage detection modules, current detection module and soft start controller；
The second voltage detection module is connect with the switching circuit, the power supply and the soft start controller, detects institute
State the cut-in voltage whether power input voltage reaches the soft starting circuit；
The current detection module is connect with the third switching tube, the power supply and the soft start controller, for detecting
The mains input current and mains input current that will test is sent to the soft start controller；
The soft start controller is connect with the third switching tube, for controlling the third according to the mains input current
The disconnection or conducting of switching tube.
11. power safety activation system according to claim 10, which is characterized in that the second voltage detection module packet
It includes: the second divider resistance and the second delay capacitor；
Second divider resistance is for detecting the power input voltage；
Second delay capacitor is for being arranged second delay time.
12. power safety activation system according to claim 10, which is characterized in that the unlatching electricity of the soft starting circuit
Pressure is higher than the cut-in voltage of the discharge circuit.
13. power safety activation system according to claim 10, which is characterized in that the grid of the third switching tube with
The soft start controller connection, the source electrode of the third switching tube are connect with the external equipment, the third switching tube
Drain electrode is connect with the current detection module.
14. power safety activation system according to claim 10, which is characterized in that the soft start controller includes:
Soft start output pin and switch pin, the soft start output pin are connect with the grid of the third switching tube；It is described to open
Pin is closed to connect by the second voltage detection module with the drain electrode of the first switch tube.
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| CN201810901314.7A CN109067161B (en) | 2018-08-09 | 2018-08-09 | Power supply safety starting system |
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|---|---|---|---|
| CN201810901314.7A CN109067161B (en) | 2018-08-09 | 2018-08-09 | Power supply safety starting system |
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| CN109067161B CN109067161B (en) | 2024-07-30 |
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| CN112713579A (en) * | 2020-12-09 | 2021-04-27 | 青岛海尔空调电子有限公司 | Control method and system of anti-surge circuit and air conditioning equipment |
| CN113573757A (en) * | 2019-03-29 | 2021-10-29 | 泰尔茂株式会社 | Liquid medicine feeding device |
| CN113675830A (en) * | 2021-10-20 | 2021-11-19 | 苏州浪潮智能科技有限公司 | Hot plug device and input voltage overshoot suppression protection circuit thereof |
| CN114253381A (en) * | 2021-12-23 | 2022-03-29 | 厦门四信通信科技有限公司 | Electronic equipment and abnormal reset circuit thereof |
| CN116231607A (en) * | 2023-02-20 | 2023-06-06 | 北京中捷时代航空科技有限公司 | Transient current suppression circuit |
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