CN207339633U - A kind of drive circuit of improved power switch pipe - Google Patents
A kind of drive circuit of improved power switch pipe Download PDFInfo
- Publication number
- CN207339633U CN207339633U CN201721209636.2U CN201721209636U CN207339633U CN 207339633 U CN207339633 U CN 207339633U CN 201721209636 U CN201721209636 U CN 201721209636U CN 207339633 U CN207339633 U CN 207339633U
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- circuit
- power switch
- resistance
- switch unit
- drive signal
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Abstract
It the utility model is related to a kind of drive circuit of improved power switch pipe, it is characterised in that：Including drive signal amplifying return circuit, charge circuit and power switch unit, drive signal amplifying return circuit has driving signal input, with input pulse drive signal, the signal output part of drive signal amplifying return circuit connects the control signal of power switch unit by charge circuit, and power switch unit has external load output terminal；It is equipped with the junction of charge circuit and power switch unit and rapidly switches off circuit and pressure limiting circuit, pressure limiting circuit is connected in parallel on the charging capacitor both ends in charge circuit, rapidly switches off backward voltage output terminal, the input terminal of output terminal connection power switch unit of the input terminal connection charge circuit in circuit.Have the characteristics that circuit element is few, turn-off speed is fast, strong antijamming capability and power attenuation are low.
Description
Technical field
A kind of power driving circuit is the utility model is related to, more particularly, to a kind of driving electricity of improved power switch pipe
Road, suitable for switching tube power supply.Belong to power technique fields.
Background technology
At present, power switch tube drives circuit can be all usually used in switching power circuit, its operation principle is：In work(
The grid OR gate pole of rate switching tube applies the drive signal of certain frequency, by controlling the power switch pipe turn-on and turn-off time,
To realize effective control of switch power source output voltage.Fig. 6 is a kind of power switch tube drives circuit of the prior art, and driving is believed
Through driving resistance to directly drive power switch pipe number after driving chip U1 amplifications, using positive voltage conducting power switch pipe,
The circuit structure of zero voltage turn-off power switch pipe.There are the following problems for such a circuit structure：(1) it is dry usually in Switching Power Supply
Disturb larger, and power switch pipe belongs to voltage-controlled device, and input impedance is very high, is easily subject to the interference in the external world and misleads
It is logical, reliability is low.(2) due to the presence of power switch pipe gate pole emitter (or grid source electrode) equivalent input capacitance, power switch
Pipe cannot be quickly turned off, and power switch pipe causes the conducting internal resistance of power switch pipe to become larger, easily because temporarily entering linear zone
Cause the increase of power switch pipe switching loss, fever serious.Fig. 7 is that a kind of band negative pressure switch-off power switching tube of the prior art drives
Dynamic circuit, although can solve the problems, such as switching tube mislead, reliability it is low, need to supply to drive circuit using positive-negative power
Electricity, need to increase negative voltage power supply all the way, there are the problem of integrated circuit is complicated, cost is higher.
Utility model content
The purpose of this utility model, is there is entirety to solve the band negative pressure power switch tube drives circuit of the prior art
A kind of the problem of circuit structure is complicated, cost is higher, there is provided improved power switch tube drives circuit.With circuit element it is few,
The characteristics of turn-off speed is fast, strong antijamming capability and power attenuation are low.
The purpose of this utility model can be reached by adopting the following technical scheme that：
A kind of improved power switch tube drives circuit, its design feature are：Including drive signal amplifying return circuit, charging
Circuit and power switch unit, drive signal amplifying return circuit have driving signal input, with input pulse drive signal, driving
The signal output part of signal amplifying return circuit connects the control signal of power switch unit, power switch unit by charge circuit
With external load output terminal；It is equipped with the junction of charge circuit and power switch unit and rapidly switches off circuit and pressure limiting go back to
Road, pressure limiting circuit are connected in parallel on the charging capacitor both ends in charge circuit, rapidly switch off the input terminal connection charge circuit in circuit
The input terminal of backward voltage output terminal, output terminal connection power switch unit, forms with the power switch for rapidly switching off structure
Tube drive circuit.
The purpose of this utility model can be reached by adopting the following technical scheme that：
Further, drive signal amplifying return circuit is made of driving chip U1, and the signal input part of driving chip U1 is external
Drive signal, the power input of driving chip U1 are connected with positive pole VCC, and the output terminal connection of driving chip U1 is charged back
The input terminal on road.
Further, the driving chip U1 is semibridge system driving chip；Its model can be IR2103 chips or
IR2101 chips.
Further, charge circuit includes resistance R1-R2, R5 and capacitance C1, and the output terminal of drive signal amplifying return circuit leads to
Cross resistance R1, R2, the control signal of capacitance C1 connection power switch units；Resistance R5 is connected across capacitance C1 and power switch list
Between first control signal junction and ground terminal, charging resistor is formed.
Further, rapidly switch off circuit and be connected across triode Q1's including resistance R2 and triode Q1, the resistance R2
Between base stage and emitter, the input terminal of the collector connection power switch unit of triode Q1, the emitter of triode Q1 connects
Connect the junction of the capacitance C1 and resistance R2 of charge circuit.
Further, the collector for rapidly switching off the triode Q1 in circuit passes through the defeated of resistance R3 connection power switch units
Enter end.
Further, the circuit that rapidly switches off can be put by adjusting the size of resistance R3, R4 to adjust discharge circuit
The electric time, so as to improve powered electromagnetic compatibility feature.
Further, the pressure limiting circuit is in series by current-limiting resistance R4 and voltage-stabiliser tube ZD1, current-limiting resistance R4 and voltage stabilizing
The both ends of capacitance C1 in charge circuit are connected across after pipe ZD1 series connection.
Further, power switch unit is made of power switch pipe Q2, power switch pipe Q2 can by N-type metal-oxide-semiconductor or
IGBT pipes are formed.
Further, diode D1 is set in the junction of resistance R5 and capacitance C1.
The utility model has beneficial effect prominent as follows：
The utility model by setting drive signal amplifying return circuit, charge circuit and power switch unit, put by drive signal
Big circuit is had driving signal input, is passed through with input pulse drive signal, the signal output part of drive signal amplifying return circuit
Charge circuit connects the control signal of power switch unit, is equipped with the junction of charge circuit and power switch unit quick
Turn-off circuit and pressure limiting circuit, form with the power switch tube drives circuit for rapidly switching off structure, should have and rapidly switch off knot
The power switch tube drives circuit of structure has easy electric circuit construction；Therefore the band negative pressure power of the prior art can be solved
Switch tube driving circuit there are the problem of integrated circuit is complicated, cost is higher, have circuit element is few, turn-off speed is fast,
The characteristics of strong antijamming capability and low power attenuation and beneficial effect.
Brief description of the drawings
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model specific embodiment 1.
Fig. 3 is the circuit diagram of the utility model specific embodiment 2.
Fig. 4 is the circuit diagram of the utility model specific embodiment 3.
Fig. 5 is the circuit diagram of the utility model specific embodiment 4.
The general power switch tube drives circuit diagram of Fig. 6 prior arts.
Fig. 7 is the power switch tube drives circuit diagram that the prior art is turned off with negative pressure.
Embodiment
Specific embodiment 1：
Referring to Figures 1 and 2, this specific embodiment 1 includes drive signal amplifying return circuit 1, charge circuit 2 and power switch list
Member 5, drive signal amplifying return circuit 1 have driving signal input, with input pulse drive signal, drive signal amplifying return circuit 1
Signal output part by charge circuit 2 connect power switch unit 5 control signal, power switch unit 5 have it is external
Load outputs；It is equipped with the junction of charge circuit 2 and power switch unit 5 and rapidly switches off circuit 3 and pressure limiting circuit 4, is limited
The charging capacitor both ends that road 4 is connected in parallel in charge circuit 2 are pushed back, the input terminal for rapidly switching off circuit 3 connects the anti-of charge circuit 2
To voltage output end, the input terminal of output terminal connection power switch unit 5, formed with the power switch pipe for rapidly switching off structure
Drive circuit.
In the present embodiment：
Drive signal amplifying return circuit 1 is made of driving chip U1, the external drive signal of signal input part of driving chip U1,
The power input of driving chip U1 is connected with positive pole VCC, the input of the output terminal connection charge circuit 2 of driving chip U1
End.The driving chip U1 is semibridge system driving chip；Its model can be the IR2103 chips or IR2101 cores of routine techniques
Piece.
Charge circuit 2 includes resistance R1-R2, R5, diode D1 and capacitance C1, the output terminal of drive signal amplifying return circuit 1
Pass through the control signal of resistance R1, R2, capacitance C1 connections power switch unit 5；Resistance R5 is connected across after connecting with capacitance C1
Between capacitance C1 and 5 control signal junction of power switch unit and ground terminal, charging resistor and discharge resistance are formed.
Rapidly switch off circuit 3 and be connected across the base stage and hair of triode Q1 including resistance R2 and triode Q1, the resistance R2
Between emitter-base bandgap grading, the collector of triode Q1 passes through the input terminal of resistance R3 connections power switch unit 5, the emitter of triode Q1
Connect the junction of the capacitance C1 and resistance R2 of charge circuit 2.Triode Q1 is the PNP type triode of routine techniques.It is described fast
Fast turn-off circuit 3 can be by adjusting the size of resistance R3, R4, to adjust discharge circuit discharge time, so as to improve power supply electricity
Magnetic compatibility feature.
The pressure limiting circuit 4 is in series by current-limiting resistance R4 and voltage-stabiliser tube ZD1, current-limiting resistance R4 and voltage-stabiliser tube ZD1 strings
The both ends of capacitance C1 in charge circuit 2 are connected across after connection.
The power switch unit 5 is made of power switch pipe Q2, and power switch pipe Q2 can be by the IGBT of routine techniques
Pipe is formed；IGBT pipe door G poles connection charge circuit 2 output terminal, emitter E connection rapidly switch off circuit 3 output terminal and ground,
Collector C external loads RL.
The operation principle of the present embodiment is as follows：
Drive signal is after driving chip U1 amplifications, the door through resistance R1, R2, capacitance C1 input driving power switching tube Q2
Pole, to control the on or off of Q2.When drive signal is high level, voltage is charged by resistance R1, R2 to capacitance C1, when
When capacitance C1 magnitudes of voltage reach the breakdown voltage of voltage-stabiliser tube ZD1, capacitance both end voltage is simultaneously maintained limit by voltage-stabiliser tube reverse breakdown
The magnitude of voltage at 4 both ends of volt circuit, the input voltage of the gate pole of power switch pipe Q2 are equal to driving chip U1 positive pole voltages VCC
Capacitance C1 both end voltages are subtracted, power switch pipe Q2 is turned at this time；When drive signal is low level, capacitance C1 both ends are stored in
Voltage reversal be added between the gate pole and emitter of power switch pipe Q2, that is, the driving voltage of power switch pipe Q2 is negative
Voltage, power switch pipe Q2 shut-offs.
Meanwhile when drive signal is high level, since resistance R2 partial pressures act on, triode Q1 base voltages are higher than transmitting
Pole tension, triode Q1 are not turned on, and are rapidly switched off circuit and are not worked；When drive signal is low level, due to power switch pipe
Q2 is in negative pressure turn off process, the presence of the gate pole and emitter equivalent input capacitance of power switch pipe Q2, the power switch
Pipe Q2 cannot be quickly turned off；Since capacitance C1 both end voltages will not be mutated, triode Q1 emitter voltages are higher than base voltage,
Triode Q1 turn on, rapidly switch off circuit 3 at this time and work normally, resistance R4, voltage-stabiliser tube ZD1, triode Q1 to power supply it
Between form repid discharge circuit, so as to further realize the purpose that power switch pipe Q2 is rapidly switched off, reduce power switch pipe and lead to
The time of amplification region is spent, reduces power switch pipe switching loss and fever.
Wherein, power switch pipe Q2 is IGBT, and the gate pole, emitter, collector correspond to G, E, C of IGBT respectively.
Specific embodiment 2：
With reference to Fig. 3, the characteristics of the utility model specific embodiment 3, is：Power switch pipe Q2 is metal-oxide-semiconductor, and the power is opened
Close unit 5 to be made of power switch pipe Q2, power switch pipe Q2 can be made of the metal-oxide-semiconductor of routine techniques；Metal-oxide-semiconductor grid G connects
Connect the output terminal of charge circuit 2, the S connections that drain rapidly switch off the output terminal and ground, source electrode D external loads RL in circuit 3；Save somewhat
Resistance R3 in body embodiment.Remaining is the same as specific embodiment 1.
Specific embodiment 3：
With reference to Fig. 4, the characteristics of this specific embodiment 3, is：Increase sets diode D1 on the basis of specific embodiment 1,
Diode D1 specifically is set in the junction of resistance R5 and capacitance C1.Remaining is the same as specific embodiment 1.
Specific embodiment 4：
With reference to Fig. 5, the characteristics of this specific embodiment 4, is：Increase sets diode D 1 on the basis of specific embodiment 2,
Diode D 1 specifically is set in the junction of resistance R5 and capacitance C 1.Remaining is the same as specific embodiment 2.
In the utility model, the size of the breakdown voltage of the voltage-stabiliser tube determines the gate pole for being added in the power switch pipe
The size of negative value between emitter (or grid source electrode)；The negative value needed according to power switch pipe shut-off,
The voltage-stabiliser tube selects breakdown voltage value more than or equal to the voltage-stabiliser tube of the negative value of the needs.The load resistance RL is
Equivalent load resistance.The charging resistor R5 can also play the role of discharge resistance.
The above, is the preferable specific embodiment of the utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art is in the range of the utility model exposure, skill according to the present utility model
Art scheme and its inventive concept are subject to equivalent substitution or change, belong to the scope of protection of the utility model.
Claims (9)
- A kind of 1. improved power switch tube drives circuit, it is characterised in that：Including drive signal amplifying return circuit (1), charge back Road (2) and power switch unit (5), drive signal amplifying return circuit (1) are had driving signal input, are driven and believed with input pulse Number, the signal output part of drive signal amplifying return circuit (1) is defeated by the control of charge circuit (2) connection power switch unit (5) Enter end, power switch unit (5) has external load output terminal；In the junction of charge circuit (2) and power switch unit (5) Equipped with circuit (3) and pressure limiting circuit (4) is rapidly switched off, pressure limiting circuit (4) are connected in parallel on the charging capacitor two in charge circuit (2) End, rapidly switches off backward voltage output terminal, the output terminal connection power switch of the input terminal connection charge circuit (2) in circuit (3) The input terminal of unit (5), forms with the power switch tube drives circuit for rapidly switching off structure.
- A kind of 2. improved power switch tube drives circuit according to claim 1, it is characterised in that：Drive signal amplifies Circuit (1) is made of driving chip U1, the external drive signal of signal input part of driving chip U1, and the power supply of driving chip U1 is defeated Enter end with positive pole VCC to be connected, the input terminal of the output terminal connection charge circuit (2) of driving chip U1.
- A kind of 3. improved power switch tube drives circuit according to claim 2, it is characterised in that：The driving chip U1 is semibridge system driving chip；Its model can be IR2103 chips or IR2101 chips.
- A kind of 4. improved power switch tube drives circuit according to claim 1, it is characterised in that：Charge circuit (2) Including resistance R1-R2, R5 and capacitance C1, the output terminal of drive signal amplifying return circuit (1) passes through resistance R1, R2, capacitance C1 connections The control signal of power switch unit (5)；Resistance R5 is connected across capacitance C1 and is connected with power switch unit (5) control signal Between place and ground terminal, charging resistor is formed.
- A kind of 5. improved power switch tube drives circuit according to claim 1, it is characterised in that：Rapidly switch off circuit (3) resistance R2 and triode Q1 is included, the resistance R2 is connected across between base stage and the emitter of triode Q1, triode Q1's Collector connects the input terminal of power switch unit 2, the capacitance C1 and resistance of the emitter connection charge circuit (2) of triode Q1 The junction of R2.
- A kind of 6. improved power switch tube drives circuit according to claim 1, it is characterised in that：Rapidly switch off circuit (3) input terminal that the collector of triode Q1 passes through resistance R3 connection power switch units (5).
- A kind of 7. improved power switch tube drives circuit according to claim 1, it is characterised in that：The pressure limiting circuit (4) it is in series by current-limiting resistance R4 and voltage-stabiliser tube ZD1, it is connected across charge circuit after current-limiting resistance R4 and voltage-stabiliser tube ZD1 series connection (2) both ends of capacitance C1 in.
- A kind of 8. improved power switch tube drives circuit according to claim 1, it is characterised in that：Power switch unit (5) it is made of power switch pipe Q2, power switch pipe Q2 is made of N-type metal-oxide-semiconductor or IGBT pipes.
- A kind of 9. improved power switch tube drives circuit according to claim 1, it is characterised in that：In resistance R5 and electricity The junction for holding C1 sets diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721209636.2U CN207339633U (en) | 2017-09-20 | 2017-09-20 | A kind of drive circuit of improved power switch pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721209636.2U CN207339633U (en) | 2017-09-20 | 2017-09-20 | A kind of drive circuit of improved power switch pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207339633U true CN207339633U (en) | 2018-05-08 |
Family
ID=62369108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721209636.2U Expired - Fee Related CN207339633U (en) | 2017-09-20 | 2017-09-20 | A kind of drive circuit of improved power switch pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207339633U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478564A (en) * | 2020-03-31 | 2020-07-31 | 深圳芯能半导体技术有限公司 | Driving circuit of depletion transistor |
-
2017
- 2017-09-20 CN CN201721209636.2U patent/CN207339633U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111478564A (en) * | 2020-03-31 | 2020-07-31 | 深圳芯能半导体技术有限公司 | Driving circuit of depletion transistor |
| CN111478564B (en) * | 2020-03-31 | 2021-09-03 | 深圳芯能半导体技术有限公司 | Driving circuit of depletion transistor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180508 Termination date: 20180920 |