CN104269997A - Transformer isolation complementation driving circuit with adjustable dead zone - Google Patents
Transformer isolation complementation driving circuit with adjustable dead zone Download PDFInfo
- Publication number
- CN104269997A CN104269997A CN201410541845.1A CN201410541845A CN104269997A CN 104269997 A CN104269997 A CN 104269997A CN 201410541845 A CN201410541845 A CN 201410541845A CN 104269997 A CN104269997 A CN 104269997A
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- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 230000000295 complement effect Effects 0.000 claims description 25
- 238000004804 winding Methods 0.000 claims description 24
- 239000004065 semiconductor Substances 0.000 claims description 12
- 230000001133 acceleration Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 9
- 239000003381 stabilizer Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- 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
- H02M1/38—Means for preventing simultaneous conduction of switches
-
- 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
- H02M1/38—Means for preventing simultaneous conduction of switches
- H02M1/385—Means for preventing simultaneous conduction of switches with means for correcting output voltage deviations introduced by the dead time
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a transformer isolation complementation driving circuit with an adjustable dead zone. The transformer isolation complementation driving circuit comprises a driver transformer, a blocking capacitor, a bootstrap circuit, a switching-off accelerating circuit, a dead-zone circuit and a shoot-through preventing circuit. The dead-zone circuit works when the level of a driving pulse becomes high to delay driving of output responses, and therefore the problems that according to a traditional transformer isolation complementation driving circuit, a dead zone circuit can not be additionally arranged and the dead time can not be regulated are effectively solved. In addition, to avoid the phenomena that the energy of a blocking capacitor and a bootstrap capacitor of the traditional driving circuit can not be released in time and shoot-through of a power switch tube occurs in the driving stopping process, the shoot-through preventing circuit is additionally arranged to avoid the shoot-through problem. The transformer isolation complementation driving circuit has very high practical value.
Description
Technical field
The present invention relates to a kind of transformer isolation complementary drive circuit, particularly relate to the transformer isolation complementary drive circuit that a kind of dead band is adjustable.
Background technology
Switching Power Supply is widely used, and the drive circuit very important part that is Switching Power Supply.Due to the needs of electric source topology itself or for security consideration, normal needs isolates from the driving pulse of control circuit and power switch pipe.
Pulse transformer isolation is a kind of isolated form that power device drive circuit is commonly used, not only structure is simple for it, do not need to provide insulating power supply, and can without the transmission pulse signal of time delay, meet the requirement to drive circuit electrical isolation, rapidity and driving force, be thus widely used in isolated drive circuit.
Common are in the clamp circuit topology of source at some, utilizing pulse transformer to provide electrical isolation to realize complementary drive is a kind of method the simplest, economic.But pulse transformer isolate complementary drives also exists certain problem, it is very little that its two-way complementary drive exports dead band, and unadjustable, had a strong impact on the safe operation of main circuit.In order to prevent converter from causing possible pipe up and down to lead directly to phenomenon because driving dead band less, usually need to add certain Dead Time between the two-way drive singal of drive circuit output.In addition, in order to realize the Sofe Switch of power switch pipe, improving the efficiency of converter, sometimes also needing drive circuit can according to actual conditions flexible Dead Time.
Different from half-bridge, full-bridge topology, in the application of active clamping circuir topology, the duty ratio of its master power switch pipe and clamp switch pipe non-constant 50%, but the change along with input voltage change.Therefore, in this type of application, complementary drive circuit must have the ability to provide the duty ratio of relative broad range to export, and meets the normal need of work of converter with this.
In order to ensure that drive circuit can realize stable driver output under wide duty cycle range, fairly simple method adds capacitance at drive circuit transformer primary side, and secondary adds bootstrap capacitor.But the drive circuit adding capacitance and bootstrap capacitor also exists certain problem, when driving pulse input turns off, due to capacitance and bootstrap capacitor still existing voltage, the straight-through of master power switch pipe and clamp switch pipe can be caused.
The problems referred to above should be paid attention to and be solved in transformer isolation complementary drive designing and employing.
Summary of the invention
The object of the invention is to overcome in prior art, the problem that the Dead Time of transformer isolation complementary drive cannot regulate and the problem that emergent power switching tube is straight-through when drive circuit driving pulse turns off.
Technical solution of the present invention is:
The transformer isolation complementary drive circuit that dead band is adjustable, comprising:
A former limit winding, the driving transformer of two vice-side winding;
Be connected to the capacitance between driving pulse input and driving transformer former limit winding;
The boostrap circuit be made up of bootstrap capacitor, diode, one end of electric capacity connects one end of driving transformer vice-side winding, and the other end is connected in diode cathode, and the anode of diode is connected to the driving transformer vice-side winding other end;
The acceleration breaking circuit be made up of resistance, PNP triode, diode, resistance is attempted by base stage and the collector electrode of triode, the emitter of triode connects the negative electrode of diode and the grid of power switch pipe, the base stage of triode connects the anode of diode, and the collector electrode of triode connects the source electrode of power switch pipe;
Dead-zone circuit, is serially connected with boostrap circuit and accelerates between breaking circuit, and described dead-zone circuit regulates metal-oxide-semiconductor to form by RC integrating circuit, NPN triode, transistor base biasing resistor, transistor collector biasing resistor, dead band;
Anti-direct circuit, is parallel to capacitance, bootstrap capacitor two ends.
Described dead-zone circuit, by adjusting the parameter of RC integrating circuit and transistor base biasing resistor, can regulate the Dead Time that drive circuit exports.
Described anti-direct circuit, when drive circuit former limit driving pulse turns off, discharges to former limit capacitance and secondary bootstrap capacitor.
Two secondary Same Name of Ends of described driving transformer are contrary.
Compared with prior art, the transformer isolation complementary drive circuit that a kind of dead band of the present invention is adjustable has the following advantages:
1) remain the capacitance on former limit and the bootstrap capacitor of secondary, can make driving transformer in wider duty cycle range, realize stable driving voltage and export.
2) by adding anti-direct circuit, effectively solve in transformer isolation complementary drive, the phenomenon that when driving pulse turns off, power switch pipe misleads.
3) anti-direct circuit only just works when driving pulse turns off, and without impact when normally working on drive circuit, can not affect the efficiency of drive circuit.
4) by adding dead-zone circuit, making transformer isolation complementary drive circuit can regulate the Dead Time of driver output flexibly, creating conditions for effectively realizing Sofe Switch.
The present invention, on the basis remaining conventional driving circuit advantage, solves Problems existing in conventional driving circuit.
Accompanying drawing explanation
Fig. 1 is traditional transformer isolation complementary drive circuit schematic diagram;
Fig. 2 is drive waveforms schematic diagram when drive circuit normally works in Fig. 1;
Fig. 3 is the drive waveforms schematic diagram when input of drive circuit driving pulse turns off in Fig. 1;
Fig. 4 is the adjustable transformer isolation complementary drive circuit schematic diagram in a kind of dead band of the present invention;
Fig. 5 is the drive waveforms schematic diagram of drive circuit of the present invention when normally working;
Drive waveforms schematic diagram when Fig. 6 is drive circuit driving pulse of the present invention input shutoff.
Embodiment
Below in conjunction with accompanying drawing, enforcement of the present invention is described in further detail:
The drive circuit that Fig. 1 is traditional before being, its operation principle is not described in detail at this, drive waveforms schematic diagram when drive waveforms schematic diagram when Fig. 2, Fig. 3 are its normal work respectively and driving pulse input turn off.
The present invention is mainly used in Switching Power Supply, for driving two power switch pipes needing complementary conducting.
As shown in Figure 4, drive circuit of the present invention mainly comprises the former limit of drive circuit and symmetrically arranged secondary drive circuit one and secondary drive circuit two, the former limit of described drive circuit comprises winding N1, electric capacity C1 and anti-direct circuit 1, described winding N1 connects with electric capacity C1, and described anti-direct circuit 1 is in parallel with electric capacity C1.Described secondary drive circuit one comprises winding N2, electric capacity C2, diode D1, electric capacity C3, resistance R1, resistance R2, resistance R3, triode Q1, metal-oxide-semiconductor Q2, resistance R4, diode D2, triode Q3, voltage-stabiliser tube D3, voltage-stabiliser tube D4 and anti-direct circuit 2, the Same Name of Ends of described winding N2 connects the negative electrode of described diode D1 respectively by electric capacity C2, the anode of described diode D2 and the base stage of described triode Q3, described diode D1 negative electrode connects the collector electrode of described triode Q1 and the grid of described metal-oxide-semiconductor respectively by described resistance R3, the negative electrode of described diode D1 is connected the base stage of described triode Q1 with described resistance R2 by the described electric capacity C3 that is connected in series, the negative electrode of described diode D1 is connected the anode of described diode D1 with described resistance R1 by the described electric capacity C3 that is connected in series, the anode of described diode D1 is connected on the line of described winding N2 different name end and described triode Q1 emitter, the emitter of described triode Q1 connects the source electrode of described metal-oxide-semiconductor Q2, the negative electrode of described diode D2 connects the emitter of described triode Q3 and the anode of described voltage-stabiliser tube D3 respectively, the negative electrode of described voltage-stabiliser tube D3 connects the negative electrode of described voltage-stabiliser tube D4, the anode of described voltage-stabiliser tube D4 connects the collector electrode of described triode Q3 and the drain electrode of described metal-oxide-semiconductor respectively, the collector electrode of described triode Q3 connects the base stage of described triode Q3 by described resistance R4, described anti-direct circuit 2 is in parallel with electric capacity C2.The winding N1 of described secondary drive circuit one is contrary with the winding N2 Same Name of Ends of secondary drive circuit two and described secondary drive circuit one is identical with the connecting circuit of secondary drive circuit two.
The transformer isolation complementary drive circuit that a kind of dead band of the present invention is adjustable, by adding anti-direct circuit, effectively solve in the driving of traditional transformer isolate complementary, when driving pulse turns off, the straight-through phenomenon of power switch pipe, enhances the reliability of drive circuit.
During normal work, just, the negative right side, bootstrap capacitor C2, C3 voltage left side just on the negative right side, a capacitance C1 voltage left side of drive circuit.When driving pulse turns off, A point becomes low level, if do not add anti-direct circuit, then capacitance C1 voltage is added on winding N1, and secondary drive circuit two exports high level, secondary drive circuit one output low level.Along with the increase of the discharge time of electric capacity C1, driving transformer is saturated, capacitance C1 is shorted, driving transformer winding N2, N3 voltage reduces to 0, secondary drive circuit one output voltage is the voltage on bootstrap capacitor C2, secondary drive circuit two output voltage is the voltage on bootstrap capacitor C3, and its oscillogram as shown in Figure 3.Owing to present invention adds anti-direct circuit, when driving pulse turns off, on capacitance C1, bootstrap capacitor C2, bootstrap capacitor C3, energy is released immediately, voltage reduces to 0, two-way exports to drive reduces to 0 rapidly, effectively solve driving pulse and close the straight-through problem of power switch pipe of having no progeny, add the drive circuit oscillogram after anti-direct circuit as shown in Figure 6.
The transformer isolation complementary drive circuit that a kind of dead band of the present invention is adjustable, by adding the dead-zone circuit shown in the empty frame of Fig. 4, have effectively achieved adding and regulating of secondary drive circuit one and secondary drive circuit two driver output dead band.
The theory diagram of composition graphs 4 and the oscillogram of Fig. 5, describe the transformer isolation complementary drive circuit that dead band is adjustable in further detail.Because secondary drive circuit one and secondary drive circuit two are symmetrically arranged, will be described for secondary drive circuit one below.Drive circuit normally works, when driving pulse becomes high level from low level, A point becomes high level, just lower negative on winding N1 current potential, just lower negative on winding N2 current potential, secondary drive circuit one C point becomes high level, and because the voltage on electric capacity C3 can not suddenly change, E point voltage equals C point voltage, triode Q1 opens (Q1 is operated in saturation region), metal-oxide-semiconductor Q2 grid is low level, and metal-oxide-semiconductor Q2 keeps turning off, drive circuit one no-output.Along with C, D point voltage is charged to electric capacity C3 by resistance R1, resistance R2, E point voltage declines, after Dead Time, E point voltage is down to 0.7V, now triode Q1 turns off, the grid voltage of metal-oxide-semiconductor Q2 equals C point voltage, metal-oxide-semiconductor Q2 conducting, diode D2 conducting, F point voltage equals C point voltage, and G point voltage equals D point voltage, secondary drive circuit one exports high level, power switch pipe is open-minded, and C, D point voltage continues through resistance R1 and charges to electric capacity C3, until voltage equals C point voltage on electric capacity C3.When driving pulse becomes low level, A point becomes low level, under negative on winding N1 current potential just, under negative on winding N2 current potential just, secondary drive circuit one diode D1 conducting, C point becomes low level, metal-oxide-semiconductor Q2 grid becomes low level, and metal-oxide-semiconductor Q2 turns off, and the base stage of triode Q3 flows out base current by resistance R4, triode Q3 conducting, accelerating power switching tube turns off.Because the voltage on electric capacity C3 can not suddenly change, E point voltage becomes negative, and triode Q1 keeps turning off, and electric capacity C3 forms loop electric discharge by electric capacity C2, winding N2 and resistance R1.By adjusting the discharge and recharge time constant of the parameter change dead-zone circuit of electric capacity C3 and resistance R1, R2, the size of added Dead Time can be regulated.
Employ drive circuit of the present invention, compared to traditional drive circuit, can not only avoid when driving pulse turns off because do not discharge the in time power switch pipe that causes of capacitance and bootstrap capacitor misleads phenomenon, and the Dead Time that can complementary drive be regulated flexibly to export, there is very strong practical value.
Claims (4)
1. the transformer isolation complementary drive circuit that dead band is adjustable, comprising:
A former limit winding, the driving transformer of two vice-side winding;
Be connected to the capacitance between driving pulse input and driving transformer former limit winding;
The boostrap circuit be made up of bootstrap capacitor, diode, one end of electric capacity connects one end of driving transformer vice-side winding, and the other end is connected with diode cathode, and the anode of diode is connected to the driving transformer vice-side winding other end;
The acceleration breaking circuit be made up of resistance, PNP triode, diode, resistance is attempted by base stage and the collector electrode of triode, the emitter of triode connects the negative electrode of diode and the grid of power switch pipe, the base stage of triode connects the anode of diode, and the collector electrode of triode connects the source electrode of power switch pipe.
Be further characterized in that and comprise:
Dead-zone circuit, is serially connected with boostrap circuit and accelerates between breaking circuit, and described dead-zone circuit regulates metal-oxide-semiconductor to form by RC integrating circuit, NPN triode, transistor base biasing resistor, transistor collector biasing resistor, dead band;
Anti-direct circuit, is parallel to capacitance and bootstrap capacitor two ends.
2. the transformer isolation complementary drive circuit that dead band as claimed in claim 1 is adjustable, is characterized in that: described dead-zone circuit, by adjusting the parameter of RC integrating circuit and transistor base biasing resistor, can regulate the Dead Time that drive circuit exports.
3. the transformer isolation complementary drive circuit that the dead band as described in any one of claim 1-2 is adjustable, is characterized in that: described anti-direct circuit, when drive circuit former limit driving pulse turns off, discharges to former limit capacitance and secondary bootstrap capacitor.
4. the transformer isolation complementary drive circuit that the dead band as described in any one of claim 1-3 is adjustable, is characterized in that: two secondary Same Name of Ends of described driving transformer are contrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541845.1A CN104269997B (en) | 2014-10-11 | 2014-10-11 | A kind of adjustable transformer isolation complementary drive circuit in dead band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410541845.1A CN104269997B (en) | 2014-10-11 | 2014-10-11 | A kind of adjustable transformer isolation complementary drive circuit in dead band |
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| CN104269997A true CN104269997A (en) | 2015-01-07 |
| CN104269997B CN104269997B (en) | 2017-09-26 |
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| CN201410541845.1A Active CN104269997B (en) | 2014-10-11 | 2014-10-11 | A kind of adjustable transformer isolation complementary drive circuit in dead band |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515349A (en) * | 2015-12-02 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | Switch tube drive circuit applied to programmable DC power supply |
| CN107104582A (en) * | 2017-07-02 | 2017-08-29 | 中国航空工业集团公司雷华电子技术研究所 | A kind of complementary drive signals generation circuit with transformer isolation |
| CN108696109A (en) * | 2017-04-07 | 2018-10-23 | 雅达电子国际有限公司 | The method of stack MOSFET circuits and operation stack MOSFET circuits |
| CN105978302B (en) * | 2016-06-17 | 2019-05-10 | 中国电子科技集团公司第二十四研究所 | A kind of pwm pulse sequential control circuit |
| CN112332821A (en) * | 2020-12-02 | 2021-02-05 | 中北大学 | MOSFET passive isolation direct connection prevention quick-closing drive circuit |
| CN112564458A (en) * | 2019-09-10 | 2021-03-26 | 苏州捷芯威半导体有限公司 | Isolation driving circuit |
| CN112769320A (en) * | 2021-01-04 | 2021-05-07 | 南京博兰得电子科技有限公司 | Clamp switch driving circuit |
Family Cites Families (7)
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| KR100632544B1 (en) * | 2004-12-15 | 2006-10-09 | 현대자동차주식회사 | DC driver gate driver circuit |
| CN201018405Y (en) * | 2007-03-09 | 2008-02-06 | 珠海泰坦科技股份有限公司 | Whole bridge phase-shift drive circuit |
| JP2011055597A (en) * | 2009-08-31 | 2011-03-17 | Fuji Electric Holdings Co Ltd | Switching element driving circuit and power converter |
| CN103066814B (en) * | 2011-10-24 | 2016-07-27 | 中兴通讯股份有限公司 | A kind of isolated drive circuit |
| CN103066967B (en) * | 2012-12-10 | 2015-10-28 | 广州金升阳科技有限公司 | A kind of drive circuit |
| CN103051160B (en) * | 2012-12-10 | 2015-04-08 | 广州金升阳科技有限公司 | Magnetic isolation driving circuit |
| CN103795229B (en) * | 2014-01-26 | 2016-09-14 | 广州视源电子科技股份有限公司 | The drive circuit of double tube positive exciting circuit of synchronous rectification |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105515349A (en) * | 2015-12-02 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | Switch tube drive circuit applied to programmable DC power supply |
| CN105515349B (en) * | 2015-12-02 | 2018-06-26 | 中国电子科技集团公司第四十一研究所 | A kind of switch tube driving circuit applied to programme-controlled dc power |
| CN105978302B (en) * | 2016-06-17 | 2019-05-10 | 中国电子科技集团公司第二十四研究所 | A kind of pwm pulse sequential control circuit |
| CN108696109A (en) * | 2017-04-07 | 2018-10-23 | 雅达电子国际有限公司 | The method of stack MOSFET circuits and operation stack MOSFET circuits |
| CN108696109B (en) * | 2017-04-07 | 2023-08-29 | 雅达电子国际有限公司 | Stacked MOSFET circuit and method of operating a stacked MOSFET circuit |
| CN107104582A (en) * | 2017-07-02 | 2017-08-29 | 中国航空工业集团公司雷华电子技术研究所 | A kind of complementary drive signals generation circuit with transformer isolation |
| CN112564458A (en) * | 2019-09-10 | 2021-03-26 | 苏州捷芯威半导体有限公司 | Isolation driving circuit |
| CN112564458B (en) * | 2019-09-10 | 2021-12-31 | 苏州捷芯威半导体有限公司 | Isolation driving circuit |
| CN112332821A (en) * | 2020-12-02 | 2021-02-05 | 中北大学 | MOSFET passive isolation direct connection prevention quick-closing drive circuit |
| CN112769320A (en) * | 2021-01-04 | 2021-05-07 | 南京博兰得电子科技有限公司 | Clamp switch driving circuit |
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| Publication number | Publication date |
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| CN104269997B (en) | 2017-09-26 |
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