CN107248810A - A kind of high-side switch drive circuit - Google Patents
A kind of high-side switch drive circuit Download PDFInfo
- Publication number
- CN107248810A CN107248810A CN201710558471.8A CN201710558471A CN107248810A CN 107248810 A CN107248810 A CN 107248810A CN 201710558471 A CN201710558471 A CN 201710558471A CN 107248810 A CN107248810 A CN 107248810A
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- Prior art keywords
- side switch
- voltage
- grid
- combinational circuit
- triode
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- 239000003381 stabilizer Substances 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims description 30
- 230000015556 catabolic process Effects 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 7
- 230000001052 transient effect Effects 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 238000007667 floating Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of high-side switch drive circuit, described high-side switch HS turn-on and turn-off are carried out automatically, principle is the operating current using coil N1 and clamping capacitance Cc, appropriate driving voltage is produced according to high-order triode combinational circuit 3 or voltage-stabiliser tube ZD characteristic, it is not required to external signal intervention, a high position is completed to drive floatingly, a kind of high-side switch drive circuit disclosed by the invention eliminates the IC and peripheral component for producing PWMH, thus the application driven floatingly is expanded, and cost is reduced, improve reliability.
Description
Technical field
The present invention relates to field of power electronics, more particularly to the converter containing high-order floating ground switching device.
Background technology
At present, high-order floating ground switching device must use the actuation techniques on floating ground to control its turn-on and turn-off, comprising floating
The IC complex and expensives of ground actuation techniques, and limited during using such IC by such IC performance, it is impossible to applied to high pressure, spy
High frequency occasion, and additional device number is more, is easily disturbed, reliability is difficult to improve, and Fig. 1 is conventional active clamping technique
Switch converters structure chart, it can be seen that high-side switch HS is included in this structure chart, need to be driven floatingly, PWML is low level in Fig. 1
LS drive signal is switched, PWMH is the drive signal produced by floating ground actuation techniques IC, for driving high-side switch HS.
The content of the invention
It is an object of the invention to by a kind of high-side switch drive circuit, mention solving background section above
Problem.
For up to this purpose, the present invention uses following technical scheme.
A kind of high-side switch drive circuit, including low-side switch LS, winding N1, high-side switch combinational circuit 2 and a high position three
Pole pipe combinational circuit 3, clamping capacitance Cc, its connected mode is：The drain electrode connection clamp electricity of described high-side switch combinational circuit 2
Hold Cc, the grid connection winding N1 of high-side switch combinational circuit 2 Same Name of Ends, the source electrode connection of high-side switch combinational circuit 2 is high
The colelctor electrode of position triode combinational circuit 3, the emitter stage of described high-order triode combinational circuit 3 connects the of the same name of winding N1
End, winding N1 Same Name of Ends connection low-side switch LS drain electrode, winding N1 other end connection clamping capacitance Cc；
Described high-side switch combinational circuit 2 include high-side switch HS, grid source voltage-stabiliser tube ZD, gate-source capacitance Cg, grid source resistance Rg,
Its connected mode is：Described grid source voltage-stabiliser tube ZD negative electrode and anode be connected in parallel on respectively described high-side switch HS grid and
Source electrode, described gate-source capacitance Cg is connected in parallel on described high-side switch HS grid and source electrode, and described grid source resistance Rg is in parallel
In described high-side switch HS grid and source electrode, described high-side switch combinational circuit 2, it act as keeping and limits driving
Voltage, makes high-side switch HS be operated in safe range；
Described high-order triode combinational circuit 3 includes high position triode HN and base impedance Zb, and its connected mode is：Described
Base impedance Zb is connected in parallel on described high-order triode HN base stage and emitter stage, described high-order triode combinational circuit 3, its
It act as：Using high-order triode HN reverse breakdown characteristics, winding N1 freewheel current is set to produce suitable forward drive electricity
Pressure, using the recovery characteristics at a slow speed of triode, makes clamping capacitance Cc discharge current be delayed and produces higher negative drive voltage.
Described grid source voltage-stabiliser tube ZD negative electrode and anode are connected in parallel on high-side switch HS grid and source electrode respectively, and it is acted on
Be the grid voltage for protecting high-side switch HS in safe range, while utilizing described grid source voltage-stabiliser tube ZD reverse breakdown special
Property, winding N1 freewheel current is produced suitable positive drive voltage, utilize described grid source voltage-stabiliser tube ZD forward conduction
Characteristic, makes clamping capacitance Cc discharge current produce less negative drive voltage；This device either voltage-stabiliser tube, or wink
State suppresses diode, or piezo-resistance.
Described gate-source capacitance Cg is connected in parallel on high-side switch HS grid and source electrode, and it is storage electric charge that it, which is acted on, for prolonging
When drive high-side switch HS turn-on and turn-off, the principle of delay is that electric capacity both end voltage can not be mutated, in the storage of neutralizing capacitance
During electric charge, the voltage at electric capacity two ends is gradually changed, and this process gradually changed is delay process.
Described base impedance Zb is connected in parallel on high-order triode HN base stage and emitter stage, base impedance Zb either electricity
Resistance, or inductance, or electric capacity.
Described high-side switch HS and low-side switch LS either switch mosfet devices, or triode, either
IGBT, or GaN switching devices, or SiC switching devices.
A kind of high-side switch drive circuit disclosed by the invention, described high-side switch HS turn-on and turn-off are to enter automatically
Capable, principle is the operating current using coil N1 and clamping capacitance Cc, according to high-order triode combinational circuit 3 or voltage-stabiliser tube ZD
Characteristic and produce appropriate driving voltage, be not required to external signal intervention, that is, complete a high position drives floatingly, disclosed by the invention one
Kind high-side switch drive circuit eliminates the IC and peripheral component for producing PWMH, thus expands the application driven floatingly
Scope, and cost is reduced, improve reliability.
Brief description of the drawings
Fig. 1 conventional active clamp circuit structure charts.
The circuit structure diagram for the first embodiment that Fig. 2 present invention is provided.
The circuit structure diagram for the second embodiment that Fig. 3 present invention is provided.
The circuit structure diagram for the 3rd embodiment that Fig. 4 present invention is provided.
The circuit structure diagram for the fourth embodiment that Fig. 5 present invention is provided.
The circuit structure diagram for the 5th embodiment that Fig. 6 present invention is provided.
The circuit structure diagram for the sixth embodiment that Fig. 7 present invention is provided.
Label declaration：1：Winding N1, one end for having round dot is Same Name of Ends；2：High-side switch combinational circuit；3：High-order three poles
Pipe combinational circuit； Vin：Input power；PWML：Drive low-side switch LS voltage signal；PWMH：Drive high-side switch HS's
Voltage signal； HS：High-side switch；LS：Low-side switch； Cc：Clamping capacitance；ZD：Voltage-stabiliser tube；TVS：Transient Suppression Diode；
HN：NPN type high position triode；HP：Positive-negative-positive high position triode；L1：Winding N1 magnetizing inductance；Lr：Leakage inductance；N2：With winding N1
The coil of coupling.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.It is understood that tool described herein
Body embodiment is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, for the ease of retouching
State, part related to the present invention rather than full content are illustrate only in accompanying drawing, it is unless otherwise defined, used herein all
Technology and scientific terminology it is identical with the implication that is generally understood that of those skilled in the art for belonging to the present invention.Made herein
Term is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
Refer to the first embodiment circuit structure diagram that the present invention shown in Fig. 2 is provided, analysis high-side switch HS conductings and
Turn off process：When low-side switch LS is turned off, leakage inductance Lr and winding N1 freewheel current pass through high-order triode combinational circuit 3, profit
A breakdown reverse voltage is produced with high-order triode HN reverse breakdown characteristics, this polarity of voltage is launches extremely just, current collection
Extremely bear, this polarity is positive drive voltage, driving high-side switch HS conductings, due to grid for high-side switch HS grid
Source electric capacity Cg presence, can be delayed and produce and terminate described positive drive voltage, this delay makes high-side switch HS in no-voltage
State is turned on；With the release of leakage inductance Lr and winding N1 energy, winding N1 both end voltage declines, and clamping capacitance Cc starts opposing connection
Group N1 releases energy, due to high-order triode HN recovery characteristics at a slow speed, and the electric current that the above-mentioned process released energy is produced flows through
High-order triode HN, at the end of high-order triode HN recovery time, can produce current collection extremely just, and it is higher that transmitting is extremely born
Voltage, this high voltage is negative drive voltage for high-side switch HS, makes high-side switch HS reliable turn-offs；By above-mentioned point
Analysis learns that high-order triode combinational circuit 3 generates positive drive voltage, and delay generates higher negative drive voltage；
Hereafter, low-side switch LS can carry out the turn-on and turn-off process in next cycle.
As the above analysis, high-side switch HS turn-on and turn-off are carried out automatically, principle be using coil N1 and
Clamping capacitance Cc operating current, appropriate driving voltage is produced according to the characteristic of high-order triode combinational circuit 3, is not required to outer
Portion's signal is intervened, and with high-side switch HS turn-on and turn-off, leakage inductance Lr energy is stored in clamping capacitance Cc, and by clamping
Electric capacity Cc is released to winding N1 recyclings.
Fig. 3 is that high-order triode HP is positive-negative-positive, work in the second embodiment circuit structure diagram that provides of the present invention, this circuit
Make principle with described first embodiment principle, will not be repeated here.
Fig. 4 is the 3rd embodiment circuit structure diagram that the present invention is provided, when described first embodiment is disconnected applied to electric current
When Discontinuous Conduction mode and electric current critical conduction mode, it may not be necessary to high-order triode combinational circuit 3, such as Fig. 4 in the described first embodiment of connection
Shown, its operation principle is as follows：When low-side switch LS is turned off, winding N1 and leakage inductance Lr freewheel current are back through voltage-stabiliser tube
ZD, and a breakdown voltage is produced, this polarity of voltage is that its negative electrode is that just, anode is negative, and this polarity is for high-side switch HS's
It is positive drive voltage for grid, driving high-side switch conducting, due to gate-source capacitance Cg presence, can be delayed and produce this forward direction
Driving voltage, this delay makes high-side switch HS be turned in zero-voltage state；With the release of Lr and winding N1 energy, winding N1's
Both end voltage declines, and clamping capacitance Cc releases energy to winding N1, and the electric current forward direction that this process released energy is produced is by steady
Pressure pipe ZD, produces its anode for just, its negative electrode is negative voltage, this voltage drives electricity for high-side switch HS for negative sense
Pressure, high-side switch HS shut-offs, due to gate-source capacitance Cg presence, the negative drive voltage that can be delayed described in producing；This was delayed
Journey makes clamping capacitance Cc energy storage exoergic more abundant；Hereafter, low-side switch LS can carry out the turn-on and turn-off mistake in next cycle
Journey, is learnt by above-mentioned analysis, and high-side switch HS turn-on and turn-off are carried out automatically, and principle is to utilize coil N1 and clamp electricity
Hold Cc operating current, appropriate driving voltage is produced according to voltage-stabiliser tube ZD characteristic, external signal intervention, voltage-stabiliser tube is not required to
ZD completes the work for producing positive drive voltage and negative drive voltage, when coil N1 and clamping capacitance Cc operating current compared with
Greatly, when causing voltage-stabiliser tube temperature rise higher, described voltage-stabiliser tube ZD is replaced using Transient Suppression Diode.
Fig. 5 is the fourth embodiment circuit structure diagram that the present invention is provided, when described first embodiment is applied to low cost
Small-power switching power-supply when, because its cost pressure and switching current are smaller, it is not necessary to use quick high-side switch device, then
Without high-side switch combinational circuit 2 in the first embodiment described in connection, omit after described high-side switch combinational circuit 2, will
The colelctor electrode of high-order triode is directly connected to clamping capacitance Cc；As shown in figure 5, its principle is：When low-side switch LS is turned off, winding
The excessively high-order triode combinational circuit 3 of N1 and leakage inductance Lr freewheel current, its sense of current is transmitting best colelctor electrode, as winding N1
Both end voltage reduction when, due to the recovery characteristics at a slow speed of triode, high-order triode HN continues to turn on, and clamping capacitance Cc passes through
High-order triode HN is to winding N1 exoergics, and the current direction of exoergic is current collection best emitter stage, as high-order triode HN recovers
Time terminates, high-order triode HN shut-offs, completes the storage of leakage inductance Lr energy and the process of recycling, the present invention the 4th is implemented
Example is that the high-side switch HS of described first embodiment can carry out high-speed switch with described first embodiment difference, loss
Low, cost is slightly higher, and the high-order triode HN in fourth embodiment of the invention can only carry out the switch of slower speed, and loss is bigger,
But cost is low.
Fig. 6 is the 5th embodiment circuit structure diagram that provides of the present invention, and the difference of itself and first embodiment of the invention is,
In the emitter stage of high-order triode combinational circuit 3, connect a Transient Suppression Diode TVS, and connected mode is that transient state suppresses two
The emitter stage of the pole pipe TVS high-order triode combinational circuit 3 of anode connection, its negative electrode connection winding N1 Same Name of Ends；Work as a high position
When the driving voltage that triode combinational circuit 3 is produced is not enough, this Transient Suppression Diode TVS need to be connected to produce higher driving
Voltage；When switching current is larger, Transient Suppression Diode TVS is used herein as, when switching current is smaller, voltage stabilizing is used herein as
Diode；The operation principle of other parts is identical with first embodiment of the invention, repeats no more.
Fig. 7 is the sixth embodiment circuit structure diagram that provides of the present invention, and the difference of itself and first embodiment of the invention is,
In described first embodiment, input power Vin positive pole is connected to clamping capacitance Cc upper end, constitutes active clamping circuir；
Input power Vin positive pole is connected to clamping capacitance Cc lower end in the present embodiment, constitutes half-bridge circuit, the driving of its high-side switch
The operation principle of process is identical with first embodiment of the invention, repeats no more.
Operation principle in summary understands that a kind of high-side switch drive circuit disclosed by the invention utilizes the continuous of winding N1
Flow electric current and produce positive drive voltage, produce negative drive voltage using clamping capacitance Cc discharge current, utilize first device
The characteristic of part produces appropriate delay, produces the drive signal for being adapted to high-side switch HS, and such a mode is not required to external signal intervention,
Relative to a high position floating ground driving chip, the application of high-order driving is expanded, cost is reduced, adds reliability.
It above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that this hair
It is bright to be not limited to specific embodiment described here, can carry out for a person skilled in the art it is various it is obvious change, again
Adjustment and replacement are without departing from protection scope of the present invention.Therefore, although by above example the present invention has been carried out compared with
For detailed description, but the present invention is not limited only to above example, without departing from the inventive concept, can be with
Including other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (5)
1. a kind of high-side switch drive circuit, including low-side switch LS, winding N1, high-side switch combinational circuit 2 and high-order three pole
Pipe combinational circuit 3, clamping capacitance Cc, it is characterized in that：The drain electrode connection clamping capacitance Cc of described high-side switch combinational circuit 2,
The grid connection winding N1 of high-side switch combinational circuit 2 Same Name of Ends, the source electrode of high-side switch combinational circuit 2 connects high-order three pole
The colelctor electrode of pipe combinational circuit 3, the emitter stage of described high-order triode combinational circuit 3 connects winding N1 Same Name of Ends, winding
N1 Same Name of Ends connection low-side switch LS drain electrode, winding N1 other end connection clamping capacitance Cc；
Described high-side switch combinational circuit 2 include high-side switch HS, grid source voltage-stabiliser tube ZD, gate-source capacitance Cg, grid source resistance Rg,
Its connected mode is：Described grid source voltage-stabiliser tube ZD negative electrode and anode be connected in parallel on respectively described high-side switch HS grid and
Source electrode, described gate-source capacitance Cg is connected in parallel on described high-side switch HS grid and source electrode, and described grid source resistance Rg is in parallel
In described high-side switch HS grid and source electrode, described high-side switch combinational circuit 2, it act as keeping and limits driving
Voltage, makes high-side switch HS be operated in safe range；
Described high-order triode combinational circuit 3 includes high position triode HN and base impedance Zb, and its connected mode is：Described
Base impedance Zb is connected in parallel on described high-order triode HN base stage and emitter stage, described high-order triode combinational circuit 3, its
It act as：Using high-order triode HN reverse breakdown characteristics, winding N1 freewheel current is set to produce suitable forward drive electricity
Pressure, using the recovery characteristics at a slow speed of triode, makes clamping capacitance Cc discharge current be delayed and produces higher negative drive voltage.
2. a kind of high-side switch drive circuit according to claim 1, it is characterized in that, described grid source voltage-stabiliser tube ZD's
Negative electrode and anode are connected in parallel on high-side switch HS grid and source electrode respectively, and it acts on the grid voltage for being to protect high-side switch HS and existed
In safe range, while using described grid source voltage-stabiliser tube ZD reverse breakdown characteristics, producing winding N1 freewheel current and fitting
The positive drive voltage of conjunction, using described grid source voltage-stabiliser tube ZD forward conduction characteristic, makes clamping capacitance Cc discharge current
Produce less negative drive voltage；This device either voltage-stabiliser tube, or Transient Suppression Diode, or pressure-sensitive electricity
Resistance.
3. a kind of high-side switch drive circuit according to claim 1, it is characterized in that, described gate-source capacitance Cg is in parallel
In high-side switch HS grid and source electrode, it is storage electric charge that it, which is acted on, for delay and running high-side switch HS turn-on and turn-off.
4. a kind of high-side switch drive circuit according to claim 1, it is characterized in that, described base impedance Zb is in parallel
In high-order triode HN base stage and emitter stage, base impedance Zb either resistance, or inductance, or electric capacity.
5. a kind of high-side switch drive circuit according to claim 1, it is characterized in that, described high-side switch HS and low level
LS either switch mosfet devices, or triode, or IGBT, or GaN switching devices are switched, either
SiC switching devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710558471.8A CN107248810A (en) | 2017-07-10 | 2017-07-10 | A kind of high-side switch drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710558471.8A CN107248810A (en) | 2017-07-10 | 2017-07-10 | A kind of high-side switch drive circuit |
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| Publication Number | Publication Date |
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| CN107248810A true CN107248810A (en) | 2017-10-13 |
Family
ID=60015303
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710558471.8A Pending CN107248810A (en) | 2017-07-10 | 2017-07-10 | A kind of high-side switch drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245750A (en) * | 2018-10-18 | 2019-01-18 | 珠海格力电器股份有限公司 | Drive circuit, power optimizer and photovoltaic system of floating switch tube |
| 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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| JPH0253232U (en) * | 1988-10-12 | 1990-04-17 | ||
| US5734563A (en) * | 1995-06-01 | 1998-03-31 | Nec Corporation | Synchronous rectification type converter |
| US5883795A (en) * | 1998-04-28 | 1999-03-16 | Lucent Technologies Inc. | Clamp circuit for a power converter and method of operation thereof |
| US20050201128A1 (en) * | 2004-03-15 | 2005-09-15 | Delta Electronics, Inc. | Driving circuit for DC/DC converter |
| US20090097281A1 (en) * | 2007-10-16 | 2009-04-16 | Leadtrend Technology Corp. | Leakage-inductance energy recycling circuit and flyback converter with leakage-inductance energy recycling circuit |
| CN203377788U (en) * | 2013-07-11 | 2014-01-01 | 广州金升阳科技有限公司 | Auxiliary switch tube isolated driving circuit of active clamp flyback circuit |
| CN104038072A (en) * | 2014-07-01 | 2014-09-10 | 浙江海得新能源有限公司 | High-voltage input auxiliary power circuit |
| CN207339632U (en) * | 2017-07-10 | 2018-05-08 | 马丽娟 | A kind of high location switch drive circuit |
| WO2022027658A1 (en) * | 2020-08-07 | 2022-02-10 | 华为数字能源技术有限公司 | Active clamp flyback circuit |
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2017
- 2017-07-10 CN CN201710558471.8A patent/CN107248810A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0253232U (en) * | 1988-10-12 | 1990-04-17 | ||
| US5734563A (en) * | 1995-06-01 | 1998-03-31 | Nec Corporation | Synchronous rectification type converter |
| US5883795A (en) * | 1998-04-28 | 1999-03-16 | Lucent Technologies Inc. | Clamp circuit for a power converter and method of operation thereof |
| US20050201128A1 (en) * | 2004-03-15 | 2005-09-15 | Delta Electronics, Inc. | Driving circuit for DC/DC converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245750A (en) * | 2018-10-18 | 2019-01-18 | 珠海格力电器股份有限公司 | Drive circuit, power optimizer and photovoltaic system of floating switch tube |
| 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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