CN106253885A - Power-on protection circuit and control method - Google Patents
Power-on protection circuit and control method Download PDFInfo
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- CN106253885A CN106253885A CN201610649749.8A CN201610649749A CN106253885A CN 106253885 A CN106253885 A CN 106253885A CN 201610649749 A CN201610649749 A CN 201610649749A CN 106253885 A CN106253885 A CN 106253885A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001681 protective effect Effects 0.000 claims description 26
- 230000005611 electricity Effects 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
- H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
- H03K17/08116—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit in composite switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
-
- 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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention discloses a power-on protection circuit and a control method. Wherein, this circuit includes: the control circuit is used for controlling the switch circuit to be conducted under the condition that the power supply voltage of the single chip microcomputer reaches the reset voltage of the single chip microcomputer; and the switching circuit is connected between the circuit to be started and the power supply of the circuit to be started, is electrically connected with the control circuit, and is used for controlling the power supply of the circuit to be started to supply power to the circuit to be started under the condition of conduction. The invention solves the technical problem that the singlechip in the prior art is uncontrollable in working state before resetting and possibly outputs a driving signal by mistake, thereby causing the misconduction of a circuit to be started.
Description
Technical field
The present invention relates to modern power electronics technology field, in particular to a kind of power-on protective circuit and controlling party
Method.
Background technology
IGBT (Insulated Gate Bipolar Transistor), insulated gate bipolar transistor, is a kind of using
MOS controls the novel power transistor of transistor, has the features such as voltage is high, electric current is big, frequency is high, conducting resistance is little.
The compound full-control type voltage driven type power that IGBT is made up of BJT (double pole triode) and MOS (insulating gate type field effect tube)
Semiconductor device, had both had MOSFET element and had driven the advantage that power is little and switching speed is fast, had again bipolar device saturated
Pressure drop is low and advantage that capacity is big.As one of important high-power main flow device of power electronics, IGBT has been widely used for house
The fields such as electrical appliance, transportation, power engineering, regenerative resource and intelligent grid.
As Fig. 1 represents in a kind of prior art containing the system structure schematic diagram of IGBT drive circuit module.Control in FIG
Molding block can be the controllers such as single-chip microcomputer, is used for controlling IGBT drive circuit module.The controllers such as single-chip microcomputer at powered on moment,
Switching Power Supply has been in the machine stage.Before single-chip microcomputer carries out reset operation, the duty of single-chip microcomputer is unknown, can not
Control, it is possible to output IGBT drives signal by mistake, makes IGBT mislead.Due to IGBT resistance to conveyance capacity and resistance to overvoltage capabilities relatively
Difference, once occurs surprisingly it to be made to damage.For that purpose it is necessary to IGBT to be carried out relevant protection.
It is uncontrollable for the duty before resetting of single-chip microcomputer in prior art, it is possible to output drive signal can be missed,
Cause what circuit to be launched misleaded technical problem, the most not yet propose effective solution.
Summary of the invention
Embodiments provide a kind of power-on protective circuit and control method, at least to solve monolithic in prior art
Machine duty before resetting is uncontrollable, it is possible to can miss output drive signal, causes what circuit to be launched misleaded skill
Art problem.
An aspect according to embodiments of the present invention, it is provided that a kind of power-on protective circuit, this circuit includes: control electricity
Road, in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, controls on-off circuit conducting；Switch electricity
Road, is connected between the power supply of circuit to be launched and circuit to be launched, and electrically connects with control circuit, in conducting
In the case of to control the power supply of circuit to be launched be that circuit to be launched is powered.
Further, another aspect according to embodiments of the present invention, additionally provide the controlling party of a kind of power-on protective circuit
Method, power-on protective circuit includes: control circuit and the on-off circuit electrically connected with control circuit, wherein, on-off circuit is also connected with
Between the power supply of circuit to be launched and circuit to be launched, including: control circuit reaches single at the supply voltage of single-chip microcomputer
In the case of the resetting voltage of sheet machine, control on-off circuit conducting；On-off circuit controls circuit to be launched in the case of conducting
Power supply be that circuit to be launched is powered.
In embodiments of the present invention, by reach the resetting voltage of single-chip microcomputer at the supply voltage of single-chip microcomputer in the case of,
Control circuit controls on-off circuit conducting, on-off circuit conducting make the power supply of circuit to be launched and circuit to be launched it
Between turn on, the power supply of circuit to be launched starts to power for circuit to be launched, has reached single-chip microcomputer and driven at powered on moment IGBT
The purpose that dynamic signal is controlled, it is achieved thereby that single-chip microcomputer is controlled at the driving signal of powered on moment circuit to be launched, it is to avoid
The technique effect of the risk of the overcurrent-overvoltage punch through damage that IGBT drives the false triggering of signal and causes, and then solve existing skill
In art, single-chip microcomputer duty before resetting is uncontrollable, it is possible to can miss output drive signal, cause circuit to be launched to mislead
Logical technical problem.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this
Bright schematic description and description is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of power-on protective circuit according to prior art；
Fig. 2 is the structural representation of a kind of power-on protective circuit of according to embodiments of the present invention 1；
Fig. 3 is the system structure schematic diagram of a kind of optional IGBT power-on protective circuit of according to embodiments of the present invention 1；
Fig. 4 is the circuit diagram of a kind of optional power-on protective circuit according to the embodiment of the present application 1；
Fig. 5 is the system structure schematic diagram of a kind of optional IGBT power-on protective circuit of according to embodiments of the present invention 1；With
And
Fig. 6 is the flow chart of the control method of a kind of power-on protective circuit of according to embodiments of the present invention 2.
Detailed description of the invention
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with in the embodiment of the present invention
Accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
The embodiment of a present invention part rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under not making creative work premise, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without being used for describing specific order or precedence.Should be appreciated that so use
Data can exchange in the appropriate case, in order to embodiments of the invention described herein can with except here diagram or
Order beyond those described is implemented.Additionally, term " includes " and " having " and their any deformation, it is intended that cover
Cover non-exclusive comprising, such as, contain series of steps or the process of unit, method, system, product or equipment are not necessarily limited to
Those steps clearly listed or unit, but can include the most clearly listing or for these processes, method, product
Or intrinsic other step of equipment or unit.
Embodiment 1
According to embodiments of the present invention, it is provided that the system embodiment of a kind of power-on protective circuit, it should be noted that attached
Step shown in the flow chart of figure can perform in the computer system of such as one group of computer executable instructions, and, though
So show logical order in flow charts, but in some cases, can perform with the order being different from herein shown
Or the step described.
Fig. 2 is the structural representation of a kind of power-on protective circuit of according to embodiments of the present invention 1, shown in Fig. 2, on this
Electric protection circuit includes:
Control circuit 202, in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, controls out
Close circuit 204 to turn on.
Concrete, in power-on protective circuit, on-off circuit in the case of control circuit turns off in off state, monolithic
The resetting voltage of machine is the voltage that single-chip microcomputer can be made to carry out normal logic programming Control.
Using the single-chip microcomputer of 51 series as example, the effective range of its power supply voltage is 3.3V～5V, resetting voltage
For 3.3V, after i.e. the power supply voltage at above-mentioned 51 series monolithics reaches 3.3V, normal logic control can be carried out.
On-off circuit 204, is connected between the power supply of circuit to be launched and circuit to be launched, and electric with control circuit
Connect, be that circuit to be launched is powered for controlling the power supply of circuit to be launched in the case of conducting.
With circuit to be launched for IGBT circuit, the power supply of tape starting circuit be the power supply of IGBT as example,
Said switching circuit can drive power supply to be connected with the IGBT in IGBT circuit, and the power supply of IGBT can be IGBT circuit institute
Public system power supply in place's system.In a kind of optional embodiment, after control circuit turns on, on-off circuit closes, from
And making the public system power supply in system is that the IGBT in IGBT circuit drives power supply to power, IGBT module is driven to run；
In an alternative embodiment, in the case of control circuit turns off, the state that on-off circuit is off, public system
Power supply cannot drive power supply to power, from without causing misleading of IGBT circuit to IGBT.
As a kind of optional embodiment, control circuit is connected with single-chip microcomputer, when the supply voltage of single-chip microcomputer reaches single
During the resetting voltage 3.3V of sheet machine, control circuit turns on, thus controls on-off circuit conducting.Electricity at the power supply of single-chip microcomputer
In the case of the resetting voltage of pressure not up to single-chip microcomputer, control circuit is off state, thus on-off circuit is also at turning off
State.
In above-mentioned steps, on-off circuit connects circuit to be launched and the power supply of circuit to be launched, and electric with control
Road is connected, it is thus achieved that the instruction of control circuit.When control circuit turns on, on-off circuit is in the conduction state, circuit to be launched
Being connected with the power supply of circuit to be launched, the power supply of circuit the most to be launched can be that circuit to be launched is powered.Work as control
When circuit processed does not turns on, on-off circuit is off, and the power supply of circuit to be launched and circuit to be launched is not attached to.
As a kind of optional embodiment, power as example using the single-chip microcomputer that single-chip microcomputer power supply is 51 series, when
After the power supply of single-chip microcomputer reaches the resetting voltage 3.3V of single-chip microcomputer, the power supply of single-chip microcomputer is powered to control circuit；Control
Circuit processed obtains this control signal, if supply voltage is more than the resetting voltage of single-chip microcomputer, then controls on-off circuit conducting, makes to treat
The power supply of start-up circuit and circuit to be launched connects, and the power supply of circuit to be launched starts to power for circuit to be launched.
Herein it should be noted that after single-chip microcomputer powers on, the supply voltage of single-chip microcomputer is risen to the confession of single-chip microcomputer by 0V
Piezoelectric voltage, during voltage rises, when the supply voltage of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, just controls switch
Circuit turn-on, namely during the voltage of single-chip microcomputer is risen to resetting voltage by 0V, the no shape being off of control circuit
State, thus control the state that on-off circuit is also at turning off.
In above-mentioned power-on protective circuit, control circuit is utilized to use same power supply with single-chip microcomputer, in the power supply of single-chip microcomputer
In the case of voltage reaches the resetting voltage of single-chip microcomputer, control circuit controls on-off circuit conducting, and on-off circuit makes electricity to be launched
Turning between power supply and the circuit to be launched on road, the power supply of circuit to be launched starts to power for circuit to be launched.Real
Show single-chip microcomputer controlled at the driving signal of powered on moment module to be launched, it is to avoid the false touch driving signal of circuit to be launched
The risk of the overcurrent-overvoltage punch through damage sent out and cause, and then solve single-chip microcomputer duty before resetting in prior art
Uncontrollable, it is possible to output drive signal can be missed, cause what circuit to be launched misleaded technical problem.
Alternatively, in the power-on protective circuit that the application proposes, control circuit includes:
First dividing potential drop electronic circuit, is connected between the first audion and single-chip microcomputer power supply, for reaching at supply voltage
In the case of resetting voltage, control the voltage between base stage and the emitter stage of the first audion more than conduction voltage drop.
First audion, the base stage of the first audion is connected with single-chip microcomputer power supply, and colelctor electrode is connected with on-off circuit,
Grounded emitter, turns in the case of the voltage between base stage and emitter stage is more than conduction voltage drop.
Concrete, the base stage of above-mentioned first audion is connected to the supply voltage of single-chip microcomputer, grounded emitter, the first dividing potential drop
Electronic circuit, after the supply voltage of single-chip microcomputer is carried out dividing potential drop, is powered to base stage and the emitter stage of the first audion, the one or three
In the case of the base stage of pole pipe and the pressure drop of emitter stage are more than the conduction voltage drop of the first audion, the first triode ON
In foregoing circuit, the first audion for reaching the feelings of the resetting voltage of single-chip microcomputer at the supply voltage of single-chip microcomputer
Turn under condition, the first dividing potential drop electronic circuit in the case of reaching resetting voltage at the voltage of power supply of single-chip microcomputer to making the
One triode ON.
Still using circuit to be launched for IGBT circuit as example, if it should be noted that by the supply voltage of single-chip microcomputer
Directly being connected with the first audion, the most once the supply voltage of single-chip microcomputer is more than the conduction voltage drop of the first audion, all can make
First triode ON, but the common conduction voltage drop more than audion of the resetting voltage of single-chip microcomputer, the most in above process,
IGBT circuit and IGBT power supply UNICOM, but single-chip microcomputer does not reset, still in uncontrollable state, if therefore by the one or three pole
Managing direct-connected with the power supply of single-chip microcomputer, uncontrollable the caused IGBT before can not avoiding due to monolithic processor resetting misleads
Logical situation.
Therefore, by the first bleeder circuit, the supply voltage of single-chip microcomputer is carried out dividing potential drop, make microcontroller power supply voltage by
During 0V rises to normal working voltage, reach the resetting voltage of single-chip microcomputer, after single-chip microcomputer has carried out resetting, just made
Obtain the first triode ON in control circuit.From the foregoing, it will be observed that in above-described embodiment that the application provides, single-chip microcomputer and first
Dividing potential drop electronic circuit is connected, and the first audion is connected with on-off circuit, and the first dividing potential drop electronic circuit is connected with the first audion again.Work as list
After the power supply voltage of sheet machine reaches the resetting voltage of single-chip microcomputer, the first dividing potential drop electronic circuit is by the power supply voltage of single-chip microcomputer
Dividing potential drop, the magnitude of voltage after dividing potential drop, as the input of the first triode, makes the first triode ON, and controls on-off circuit conducting.
Alternatively, in the power-on protective circuit that the application proposes, the first dividing potential drop electronic circuit includes:
First divider resistance, is connected between base stage and the emitter stage of the first audion, for single-chip microcomputer power supply
The voltage provided is that the first audion is powered after carrying out dividing potential drop；
Second divider resistance, is connected between the base stage of the first audion and single-chip microcomputer power supply, for single-chip microcomputer
The voltage that power supply provides carries out dividing potential drop.
Still using circuit to be launched for IGBT circuit as example, as it is shown on figure 3, the first divider resistance and the second divider resistance
Following relation should be met: in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, the first divider resistance
The voltage got has reached the conduction voltage drop of the first audion, now the first triode ON.
Fig. 4 is the circuit diagram of a kind of optional power-on protective circuit according to the embodiment of the present application, optionally real in one
Execute in example, shown in Fig. 4, with circuit to be launched be still IGBT circuit as example, R1, R2 represent the first divider resistance respectively
With the second divider resistance, Q1 represents the first audion, represents single-chip microcomputer power supply with U, then U Yu Q1 be divided into direct ratio, and
When U is equal to the resetting voltage of single-chip microcomputer, there is following relation,
Wherein uConductingIt it is the conduction voltage drop of the first audion.
Herein it should be noted that the concrete resistance of the first resistance, the second resistance is not specifically limited, can be according to monolithic
The model of machine and the kind of the first audion are adjusted.
Optionally, according to the above embodiments of the present application, the supply voltage at single-chip microcomputer is not up to the resetting voltage of single-chip microcomputer
In the case of, make the conduction voltage drop less than the first audion of the voltage between base stage and the emitter stage of the first audion.
Alternatively, on the IGBT that the application proposes in electric protection system, on-off circuit includes:
Second dividing potential drop electronic circuit, is connected between the colelctor electrode of the first audion and the second audion, for the one or three
In the case of the pipe conducting of pole, control the voltage between base stage and the emitter stage of the second audion more than conduction voltage drop.
Second audion, the base stage of the second audion is connected with the colelctor electrode of the first audion, colelctor electrode and electricity to be launched
Road is connected, and emitter stage is connected with the power supply of circuit to be launched, for the voltage between base stage and emitter stage more than conducting
Turn in the case of pressure drop.
From the foregoing, it will be observed that in above-described embodiment that the application provides, the current collection of the first audion extremely control circuit defeated
Go out end, be also the input of on-off circuit.When, after the first triode ON, the second dividing potential drop electronic circuit obtains input voltage, and right
It carries out dividing potential drop, and using the voltage after dividing potential drop as the input voltage of the second audion.When the second audion dividing potential drop more than or
During equal to the conduction voltage drop of the second audion, the second triode ON, now on-off circuit have received Continuity signal, and performs
The operation of conducting.
Alternatively, in the power-on protective circuit that the application proposes, the second dividing potential drop electronic circuit includes:
3rd divider resistance, is connected between base stage and the emitter stage of the second audion, and in the power supply of circuit to be launched
Power supply is connected, and the voltage provided for treating the power supply of start-up circuit is that the second audion is powered after carrying out dividing potential drop；
4th divider resistance, is connected between the colelctor electrode of the first audion and the base stage of the second audion, is used for treating
The voltage that the power supply of start-up circuit provides carries out dividing potential drop.
Concrete, as it is shown in figure 5, in foregoing circuit, in the case of the first triode ON, the confession of circuit to be launched
Electricity power supply is by the 3rd divider resistance, the 4th divider resistance and the first audion and ground conducting, and the 3rd divider resistance is second
Audion is powered, and makes the conduction voltage drop more than the second audion of the pressure drop between base stage and the emitter stage of the second audion, thus
Two triode ON made.
In a kind of optional embodiment, shown in Fig. 4, it is still IGBT circuit with circuit to be launched as example, R3,
R4 represents the 3rd divider resistance and the 4th divider resistance respectively, and Q2 represents the second audion, and during audion Q1 conducting, Q2 turns on,
IGBT drives power supply to obtain electric.After audion Q1 conducting, IGBT drives power supply to carry out dividing potential drop, resistance R3 by resistance R3 Yu R4
When dividing potential drop is more than the driving voltage between emitter stage and the base stage of Q2, the colelctor electrode of Q1 turns on emitter stage, and IGBT drives power supply
Start electric.The dividing potential drop of resistance resistance the to be guaranteed R63 of resistance R3 Yu the R4 EB pole driving voltage more than Q2, can be according to reality
Application, the resistance of resistance R3 with R4 can adjust accordingly.When audion Q1 disconnects, Q2 disconnects, and IGBT drives power supply electricity
Pressure is zero.
From the foregoing, it will be observed that in above-described embodiment that the application provides, the power supply of circuit to be launched is for when switch electricity
It is that circuit to be launched is powered during the conducting of road.3rd divider resistance is treated the power supply of start-up circuit and is carried out dividing potential drop, after dividing potential drop
Voltage is as the input of the second audion, and the power supply that the 4th divider resistance treats start-up circuit carries out dividing potential drop, after dividing potential drop
Voltage as the supply voltage of circuit to be launched.
Optionally, according to the above embodiments of the present application, in the case of the first audion does not turns on, the base of the second audion
Voltage between pole and emitter stage is less than the conduction voltage drop of the second audion.
Alternatively, on the IGBT that the application proposes in electric protection system, the first audion in control circuit is NPN type
Audion.
Concrete, the base stage of the first audion is connected with the power supply of single-chip microcomputer by the second divider resistance, power supply
The input of power supply is generally positive voltage, so the first triode in control circuit is NPN type triode can improve circuit
Capacity of resisting disturbance.
Alternatively, in the power-on protective circuit that the application proposes, the second audion in on-off circuit is positive-negative-positive three pole
Pipe.
Concrete, the second audion and the first audion composition complementary circuit, further increase whole upper electric protection electricity
The capacity of resisting disturbance on road.
Embodiment 2
Fig. 6 is the flow chart of the control method of a kind of power-on protective circuit of according to embodiments of the present invention 2, upper electric protection electricity
Road includes: control circuit and the on-off circuit electrically connected with control circuit, wherein, on-off circuit be also attached to circuit to be launched with
Between the power supply of circuit to be launched, as shown in Figure 6, the method comprises the steps:
Step S602, control circuit, in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, controls
On-off circuit turns on.
Concrete, in above-mentioned steps S602, control circuit is connected with single-chip microcomputer, and the output voltage of single-chip microcomputer is as control
The input signal of circuit, when the power supply voltage of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, control circuit is on
State, and control on-off circuit conducting；When the power supply voltage of single-chip microcomputer does not reaches the resetting voltage of single-chip microcomputer, control electricity
Road can receive single-chip microcomputer equally and send the signal of coming, but this voltage signal is not enough to drive control circuit conducting.
Step S604, it is that circuit to be launched supplies that on-off circuit controls the power supply of circuit to be launched in the case of conducting
Electricity.
In above-mentioned steps S604, using circuit to be launched for IGBT circuit as example, when the power supply electricity of single-chip microcomputer
When pressure reaches the resetting voltage of single-chip microcomputer, control circuit receives single-chip microcomputer and sends and the signal that comes, and controls on-off circuit and lead
Logical；On-off circuit is in the case of conducting, and IGBT power supply is that IGBT circuit is powered.It should be noted that work as control circuit
When not working, illustrating that the power supply voltage of now single-chip microcomputer is not up to the resetting voltage of single-chip microcomputer, on-off circuit does not receives
The voltage signal of control circuit, on-off circuit is off, and IGBT power supply can not be powered for IGBT circuit.
Still using circuit to be launched for IGBT circuit as example, the power supply of tape starting circuit is the power supply of IGBT
As example, said switching circuit can drive power supply to be connected with the IGBT in IGBT circuit, and the power supply of IGBT can be
Public system power supply in system residing for IGBT circuit, in a kind of optional embodiment, after on-off circuit turns on, switch electricity
Road closes, and drives power supply to power so that the public system power supply in system is the IGBT in IGBT circuit, drives IGBT
Module is run；In an alternative embodiment, in the case of on-off circuit fails conducting, on-off circuit is off
State, public system power supply cannot drive power supply to power, from without causing misleading of IGBT circuit to IGBT.
In the above-mentioned power-on protective circuit being made up of control circuit and on-off circuit, the supply voltage at single-chip microcomputer reaches single
In the case of the resetting voltage of sheet machine, control circuit controls on-off circuit conducting, and on-off circuit makes to wait to open in the case of conducting
Turning between power supply and the circuit to be launched on galvanic electricity road, the power supply of circuit to be launched starts to supply for circuit to be launched
Electricity.Achieve single-chip microcomputer controlled at the driving signal of powered on moment circuit to be launched, it is to avoid the driving signal of circuit to be launched
False triggering and the risk of overcurrent-overvoltage punch through damage that causes, and then solve single-chip microcomputer work before resetting in prior art
Make state uncontrollable, it is possible to output drive signal can be missed, cause what circuit to be launched misleaded technical problem.
Optionally, the above-described embodiment provided according to the application, control circuit is by the first audion and the first dividing potential drop electricity
Road forms, and wherein, the first dividing potential drop electronic circuit is connected between the first audion and single-chip microcomputer power supply, and control circuit is at monolithic
In the case of the supply voltage of machine reaches the resetting voltage of single-chip microcomputer, control on-off circuit conducting.Step S602 also includes:
Step S6020, in the case of the power supply of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, the first dividing potential drop electricity
Road reaches the conduction voltage drop of the first audion for the voltage that the first audion provides.
Concrete, in above-mentioned steps S6020, the power supply at single-chip microcomputer reaches the situation of the resetting voltage of single-chip microcomputer
Under, control circuit receives the supply voltage signal of single-chip microcomputer, and this voltage signal is the input voltage of the first dividing potential drop electronic circuit,
When the output voltage guaranteeing the first dividing potential drop electronic circuit is more than the conduction voltage drop of the first audion, the first triode ON.Wherein.
The output voltage of the first dividing potential drop electronic circuit is by the first divider resistance in the first dividing potential drop electronic circuit and the resistance of the second divider resistance
Determine.
Optionally, the above-described embodiment provided according to the application, on-off circuit is by the second audion and the second dividing potential drop electricity
Road forms, and wherein, the second dividing potential drop electronic circuit is connected between the colelctor electrode of the first audion and the base stage of the second audion, switch
It is that circuit to be launched is powered that circuit controls the power supply of circuit to be launched in the case of conducting, and step S604 also includes:
Step S6040, in the case of on-off circuit turns on, the voltage that the second dividing potential drop electronic circuit provides for the second audion
Reach the conduction voltage drop of the second audion.
Concrete, in above-mentioned steps S6040, when the power supply of single-chip microcomputer reaches the resetting voltage of single-chip microcomputer, control
Circuit controling switch circuit turn-on processed, meanwhile, this output voltage values is as the input electricity of the second dividing potential drop electronic circuit in on-off circuit
Pressure, when the voltage after the second dividing potential drop electronic circuit dividing potential drop is more than the conduction voltage drop of the second audion, the second triode ON, now
On-off circuit is in closure state, and IGBT power supply is connected with IGBT circuit, and IGBT power supply is that IGBT circuit is powered.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not has in certain embodiment
The part described in detail, may refer to the associated description of other embodiments.
In several embodiments provided herein, it should be understood that disclosed technology contents, can be passed through other
Mode realizes.Wherein, device embodiment described above is only schematically, the division of the most described unit, Ke Yiwei
A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual
Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, unit or module or communication link
Connect, can be being electrical or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.Above-mentioned integrated list
Unit both can realize to use the form of hardware, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit realizes and as independent production marketing or use using the form of SFU software functional unit
Time, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part that in other words prior art contributed or this technical scheme completely or partially can be with the form of software product
Embodying, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be for personal computer, server or the network equipment etc.) perform the whole of method described in each embodiment of the present invention or
Part steps.And aforesaid storage medium includes: USB flash disk, read only memory (ROM, Read-Only Memory), random access memory are deposited
Reservoir (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can store program code
Medium.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a power-on protective circuit, it is characterised in that including:
Control circuit, in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of described single-chip microcomputer, controls switch
Circuit turn-on；
Described on-off circuit, is connected between the power supply of circuit to be launched and described circuit to be launched, and with described control
Circuit electrically connects, and is that described circuit to be launched supplies for controlling the power supply of described circuit to be launched in the case of conducting
Electricity.
Circuit the most according to claim 1, it is characterised in that described control circuit includes:
First dividing potential drop electronic circuit, is connected between the first audion and described single-chip microcomputer power supply, at described power supply electricity
In the case of pressure reaches described resetting voltage, control the voltage between base stage and the emitter stage of described first audion more than conducting
Pressure drop；
Described first audion, the base stage of described first audion is connected with described single-chip microcomputer power supply, and colelctor electrode is with described
On-off circuit is connected, grounded emitter, for the voltage between described base stage and described emitter stage more than described conduction voltage drop
In the case of turn on.
Circuit the most according to claim 2, it is characterised in that described first dividing potential drop electronic circuit includes:
First divider resistance, is connected between base stage and the emitter stage of described first audion, for powering described single-chip microcomputer
The voltage that power supply provides is powered for described first audion after carrying out dividing potential drop；
Second divider resistance, is connected between the base stage of described first audion and described single-chip microcomputer power supply, for institute
The voltage that stating single-chip microcomputer power supply provides carries out dividing potential drop.
Circuit the most according to claim 2, it is characterised in that described on-off circuit includes:
Second dividing potential drop electronic circuit, is connected between colelctor electrode and second audion of described first audion, for described the
In the case of one triode ON, control the voltage between base stage and the emitter stage of described second audion more than conduction voltage drop；
Described second audion, the base stage of described second audion is connected with the colelctor electrode of described first audion, colelctor electrode with
Described circuit to be launched is connected, and emitter stage is connected with the power supply of described circuit to be launched, is used in described base stage and described
Voltage between emitter stage turns on more than in the case of conduction voltage drop.
Circuit the most according to claim 4, it is characterised in that described second dividing potential drop electronic circuit includes:
3rd divider resistance, is connected between base stage and the emitter stage of described second audion, and in described circuit to be launched
Power supply is connected, and the voltage for providing the power supply of described circuit to be launched is described two or three pole after carrying out dividing potential drop
Pipe is powered；
4th divider resistance, is connected between the colelctor electrode of described first audion and the base stage of described second audion, is used for
The voltage providing the power supply of described circuit to be launched carries out dividing potential drop.
Circuit the most as claimed in any of claims 2 to 5, it is characterised in that described first audion is NPN type three
Pole is managed.
7. according to the circuit described in claim 4 or 5, it is characterised in that described second audion is PNP type triode.
8. the control method of a power-on protective circuit, it is characterised in that described power-on protective circuit includes: control circuit and with
The on-off circuit of described control circuit electrical connection, wherein, described on-off circuit is also attached to circuit to be launched and circuit to be launched
Power supply between, described method includes:
Described control circuit, in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of described single-chip microcomputer, controls switch electricity
Road turns on；
It is that described circuit to be launched supplies that described on-off circuit controls the power supply of described circuit to be launched in the case of conducting
Electricity.
Method the most according to claim 8, it is characterised in that described control circuit includes: the first audion and first point
Pressure electronic circuit, wherein, described first dividing potential drop electronic circuit is connected between described first audion and described single-chip microcomputer power supply,
Described control circuit, in the case of the supply voltage of single-chip microcomputer reaches the resetting voltage of described single-chip microcomputer, controls on-off circuit and leads
Logical, including:
In the case of the power supply of described single-chip microcomputer reaches the resetting voltage of described single-chip microcomputer, described first dividing potential drop electronic circuit
Voltage for described first audion offer reaches the conduction voltage drop of described first audion.
Method the most according to claim 9, it is characterised in that described on-off circuit includes: the second audion and second point
Pressure electronic circuit, wherein, described second dividing potential drop electronic circuit is connected to the colelctor electrode of described first audion and described second audion
Between, it is described circuit to be launched that described on-off circuit controls the power supply of described circuit to be launched in the case of conducting
Power supply, including:
In the case of described on-off circuit turns on, the voltage that described second dividing potential drop electronic circuit provides for described second audion reaches
Conduction voltage drop to described second audion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649749.8A CN106253885B (en) | 2016-08-09 | 2016-08-09 | Power-on protection circuit and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649749.8A CN106253885B (en) | 2016-08-09 | 2016-08-09 | Power-on protection circuit and control method |
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| CN106253885A true CN106253885A (en) | 2016-12-21 |
| CN106253885B CN106253885B (en) | 2023-05-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243850A (en) * | 2021-12-23 | 2022-03-25 | 珠海格力电器股份有限公司 | Electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2650214Y (en) * | 2003-11-17 | 2004-10-20 | 金巨宝 | Power-supply controller capable of reiably resetting micro processor |
| CN201562230U (en) * | 2009-12-25 | 2010-08-25 | 深圳市普联技术有限公司 | Electronic system and resetting device thereof |
| JP2012114629A (en) * | 2010-11-24 | 2012-06-14 | Funai Electric Co Ltd | Reset circuit |
-
2016
- 2016-08-09 CN CN201610649749.8A patent/CN106253885B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2650214Y (en) * | 2003-11-17 | 2004-10-20 | 金巨宝 | Power-supply controller capable of reiably resetting micro processor |
| CN201562230U (en) * | 2009-12-25 | 2010-08-25 | 深圳市普联技术有限公司 | Electronic system and resetting device thereof |
| JP2012114629A (en) * | 2010-11-24 | 2012-06-14 | Funai Electric Co Ltd | Reset circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114243850A (en) * | 2021-12-23 | 2022-03-25 | 珠海格力电器股份有限公司 | Electronic device |
| CN114243850B (en) * | 2021-12-23 | 2023-10-27 | 珠海格力电器股份有限公司 | Electronic equipment |
Also Published As
| Publication number | Publication date |
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| CN106253885B (en) | 2023-05-09 |
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