CN102006052A - Power triode drive circuit and driving method - Google Patents
Power triode drive circuit and driving method Download PDFInfo
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- CN102006052A CN102006052A CN2009101700522A CN200910170052A CN102006052A CN 102006052 A CN102006052 A CN 102006052A CN 2009101700522 A CN2009101700522 A CN 2009101700522A CN 200910170052 A CN200910170052 A CN 200910170052A CN 102006052 A CN102006052 A CN 102006052A
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Abstract
The invention discloses a power triode drive circuit, which comprises a constant flow source drive module and a closed module that are connected serially. A base electrode of a power triode is connected between the constant flow source drive module and the closed module; a constant flow source is arranged in the constant flow source drive module so as to provide a constant base electrode current for the base electrode of the power triode when the power triode is switched on; and the closed module is grounded so that the base electrode of the power triode is short-circuited when the power triode is switched off. Through the novel power triode drive circuit, the power triode is directly driven without adding any periphery element devices, thereby the cost is saved and the application range of the power triode is improved.
Description
Technical field
The present invention relates to electronic technology field, particularly a kind of pliotron drive circuit and driving method.
Background technology
Present power supply changeover device roughly can be divided into two kinds of linear transformations device and switch converters.Compare with linear quantizer, switch converters occupies absolute leading position at present with its high efficiency, small size, lighter advantages such as weight.And can select power transistor for use usually as the switching tube of one of switch converters core.Power transistor is broadly divided into field-effect transistor, bipolar transistor and insulated gate transistor.In small power electric source converter field, because good switching characteristic of bipolar transistor and cheap advantages such as price are also used widely.
As shown in Figure 1, be the circuit diagram of conventional switch power supply adaptor solution.In existing traditional scheme, generally adopt the switch control device of power MOSFET as main limit.For pliotron, power MOSFET has switching speed and lower conduction loss faster.But switching speed can cause bigger switching noise faster, and simultaneously in the low-power applications field, the price that pliotron is cheap relatively also makes it have temptation.Drive with the voltage-type of conventional power switch mosfet and different to be, the type of drive that pliotron needs current mode is to provide enough base current in order to amplify.Therefore, in traditional scheme, generally can do corresponding optimization to adapt to the driving needs of pliotron to traditional push-pull driver.
Below the driving process of pliotron is simply introduced.As shown in Figure 2, be traditional pliotron drive circuit schematic diagram.As shown in Figure 2, if use traditional push-pull driver, then need increase some peripheral components and move with guaranteed output triode Q1 normal switch in order to driving power triode Q1.Wherein, the base stage of pliotron Q1 links to each other with R1, the collector electrode of pliotron Q1 links to each other with HVDC (high voltage direct current transmission), the emitter of pliotron Q1 is by grounding through resistance, and R1 can provide suitable base current to be operated in the saturation region with guaranteed output triode Q1 during pliotron is opened.Simultaneously, Q1 can close rapidly for the guaranteed output triode, and diode D1 (generally adopting Schottky diode) and capacitor C 1 are used for extracting fast opening the minority carrier of storage in pliotron Q1 base.
The shortcoming that prior art exists is, owing to increased some devices such as capacitor C 1 and diode D1 etc. in the prior art, therefore inevitably bring the increase on the cost, weakened the cost advantage of pliotron, brought difficulty for the application of pliotron aspect power source conversion.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves the high problem of pliotron drive circuit cost in the prior art.
For achieving the above object, one aspect of the present invention proposes a kind of pliotron drive circuit, comprising: the constant-current source driver module and the closing module of series connection, the base stage of pliotron are connected between described constant-current source driver module and the closing module; And in described constant-current source driver module, constant-current source is arranged, provide constant base current with base stage when opening described pliotron for described pliotron, described closing module ground connection, with when closing described pliotron with the base stage short circuit of described pliotron.
The present invention also proposes a kind of driving method on the other hand, the pliotron drive circuit comprises the constant-current source driver module and the closing module of series connection, the base stage of described pliotron is connected between described constant-current source driver module and the closing module, said method comprising the steps of: when opening described pliotron, open described constant-current source driver module and close described closing module, so that the constant-current source in the described constant-current source driver module provides constant base current for the base stage of pliotron; When closing described pliotron, close described constant-current source driver module and open described closing module, with by of the base stage short circuit of described closing module described pliotron.
By the novel pliotron drive circuit that the present invention proposes, need not to increase just direct driving power triode of any peripheral component, provide cost savings, improved the range of application of pliotron.And the present invention has also reduced switching loss in the switching speed of bring to power triode.The constant-current source driver module of uniqueness of the present invention and closing module can utilize the highest voltage endurance of pliotron with the safety of guaranteed output triode during switch in addition.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the circuit diagram of conventional switch power supply adaptor solution;
Fig. 2 is traditional pliotron drive circuit schematic diagram;
Fig. 3 is the schematic diagram of the pliotron drive circuit of the embodiment of the invention one;
Fig. 4 is the pliotron drive circuit schematic diagram of the embodiment of the invention two;
Fig. 5 is the pliotron drive circuit schematic diagram of the embodiment of the invention three;
Fig. 6 is the pliotron drive circuit schematic diagram of the embodiment of the invention four.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
The present invention mainly is, according to the switching characteristic of pliotron and required drive circuit characteristics thereof, in conjunction with CMOS high-pressure process characteristics, adopt constant current to open and cooperate big electric current shut-off circuit, reduce the cost of drive circuit simultaneously in order to the switching speed of bring to power triode.Particularly, when opening pliotron, provide constant base current for pliotron, during opening, enter the saturation region rapidly with the guaranteed output triode, in order to reduce turn-on consumption to greatest extent by the constant-current source in the constant-current source driver module; And the present invention is when closing pliotron, make between pliotron base stage and the emitter near short circuit (resistance R 2 common values are very little), the minority carrier that is stored in the base during can the guaranteed output triode opening is compound memory time and the shut-in time to reduce pliotron rapidly, in order to reduce the turn-off power loss of pliotron.
As shown in Figure 3; schematic diagram for the pliotron drive circuit of the embodiment of the invention one; for purpose clearly; in this schematic diagram, also show pliotron; and the connection of pliotron emitter and collector; but need to prove that pliotron is that the connected mode of its emitter and collector also can change not in the drive circuit that the present invention proposes, these variations all should be included within protection scope of the present invention.As shown in Figure 3, the collector electrode of pliotron Q1 links to each other with HVDC (high voltage direct current transmission), and the emitter of pliotron Q1 is by resistance R 2 ground connection.The drive circuit of this pliotron Q1 comprises the constant-current source driver module and the closing module of series connection, the base stage of pliotron Q1 is connected between constant-current source driver module and the closing module, and in the constant-current source driver module, constant-current source is arranged, being that the base stage of pliotron Q1 provides constant base current when opening pliotron Q1, thereby make pliotron Q1 during opening, promptly enter the saturation region, in order to reduce turn-on consumption to greatest extent, improve switching speed.And closing module ground connection, with when closing pliotron Q1 with the base stage short circuit of pliotron, between base stage by making pliotron Q1 and the emitter near short circuit (resistance R 2 common values are very little), the minority carrier that can the guaranteed output triode be stored in pliotron Q1 base during Q1 opens is compound memory time and the shut-in time to reduce pliotron Q1 rapidly, in order to reduce the turn-off power loss of pliotron Q1.
The method that drives this pliotron Q1 is, when opening pliotron Q1, opens the constant-current source driver module and closing module is closed, so that the constant-current source in the constant-current source driver module provides constant base current for the base stage of pliotron Q1.When closing pliotron Q1, close constant-current source driver module and open and close module, with by the base stage short circuit of closing module with pliotron Q1.
Need to prove; the foregoing description is basic principle figure of the present invention; constant-current source driver module wherein and closing module can realize by multiple circuit mode; for the present invention there being clearer understanding; below just will adopt the mode of specific embodiment that constant-current source driver module and closing module are described; but these embodiment only are one or more modes that realize constant-current source driver module and closing module; those skilled in the art can thought according to the present invention make modification or the variation that is equal on the basis of following examples, modification that these are equal to or variation all should be included within protection scope of the present invention.
As shown in Figure 4, be the pliotron drive circuit schematic diagram of the embodiment of the invention two.In this embodiment, the constant-current source driver module comprises the first constant-current source I1 and first switch S 1 of series connection, closing module comprises second switch S2, first switch S 1 and second switch S2 series connection, the base stage of pliotron Q1 is connected between first switch S 1 and the second switch S2, and second switch S2 ground connection.When opening pliotron Q1, first switch S, 1 closed second switch S2 simultaneously disconnects, provide constant base current by constant-current source circuit I1 for it, during opening, enter the saturation region rapidly, in order to reduce turn-on consumption to greatest extent with guaranteed output triode Q1.When closing pliotron Q1, closed first switch S 1 simultaneously of second switch S2 disconnects, between this moment pliotron Q1 base stage and the emitter near short circuit (resistance R 2 common values are very little), the minority carrier that can the guaranteed output triode be stored in the base during Q1 opens is compound memory time and the shut-in time to reduce pliotron Q1 rapidly, in order to reduce the turn-off power loss of pliotron Q1.On the other hand, the resistance between withstand voltage and down periods base stage and the emitter of pliotron Q1 is relevant, and usually, the impedance between pliotron Q1 base stage and the emitter is more little, withstand voltage also just high more between pliotron Q1 collector electrode and the emitter.Following relational expression: V (CEO)＜V (CER)＜V (CES) ≈ V (CBO) is arranged.Wherein, V (CEO) is when pliotron Q1 base stage is unsettled, the reverse breakdown voltage between pliotron Q1 collector electrode and the emitter; V (CER) is when resistance is R between pliotron Q1 base stage and the emitter, the reverse breakdown voltage between pliotron Q1 collector electrode and the emitter; V (CES) is when pliotron Q1 base stage and emitter short circuit, the reverse breakdown voltage between pliotron Q1 collector electrode and the emitter; V (CBO) is when pliotron Q1 emitter is unsettled, the reverse breakdown voltage between pliotron Q1 collector electrode and the base stage.
In the practical application of Switching Power Supply, farthest use the highest V of triode (CBO) withstand voltage under the prerequisite that improves fail safe, to reduce cost greatly.Therefore, reduce between down periods pliotron Q1 base stage and the emitter resistance greatly the withstand voltage of bring to power triode Q1 to guarantee the safety during the switch.
As shown in Figure 5, be the pliotron drive circuit schematic diagram of the embodiment of the invention three.In Switching Power Supply was used, the Switching Power Supply control chip adopted CMOS technology to realize usually and since chip need be in the voltage range of broad operate as normal (be generally 6V～30V), therefore need to adopt high-voltage CMOS technology to realize.In high-voltage CMOS technology, in order to improve the withstand voltage of device, need to increase the size of MOSFET usually and drain terminal or leakage two ends, source are carried out shallow doping simultaneously, will certainly cause the internal resistance of device to increase like this.Therefore in order to address this problem, the present invention proposes embodiment three, as shown in Figure 5, the constant-current source driver module comprises first current mirror of being made up of PMOS pipe M1 and the 2nd PMOS pipe M2, and control the 3rd switch S 3 of this first current mirror and be the second constant-current source I2 of first current mirror power supply, closing module comprises NMOS pipe M3.When unlatching pliotron Q1, to open the 3rd switch S 3 and close NMOS pipe M3, first current mirror that the second constant-current source I2 forms by PMOS pipe M1 and the 2nd PMOS pipe M2 is output as pliotron Q1 by the mirror image amplification provides base current.Simultaneously, when closing pliotron Q1, close the 3rd switch S 3 and open NMOS pipe M3, make the Low ESR of winning between NMOS pipe M3 conducting guaranteed output triode Q1 base stage and emitter.
But, in this embodiment because the 2nd PMOS pipe M2 is PMOS, therefore in its conduction period, if pliotron Q1 does not insert and has just damaged or when chip testing, output (OUT) terminal voltage will reach supply voltage, and the one NMOS pipe M3 must possess certain high-voltage resistance capability and could guarantee can not damage this moment.As previously described, if NMOS pipe M3 adopts high-voltage tube,, need to use very big chip area (be generally same internal resistance low-voltage device 20～30 times) then for reaching less internal resistance.
In order to overcome the shortcoming of the foregoing description three, the invention allows for preferred embodiment four, as shown in Figure 6, be the pliotron drive circuit schematic diagram of the embodiment of the invention four.
In this embodiment, the constant-current source driver module comprises second current mirror of being made up of the 2nd NMOS pipe M1 and the 3rd NMOS pipe M2, control the 4th NMOS pipe M4 of second current mirror and be the 3rd constant-current source I3 of second current mirror power supply, closing module comprises the 5th NMOS pipe M3, wherein, the grid of the 4th NMOS pipe M4 and the 5th NMOS pipe M3 is controlled by control unit, control unit links to each other with closing module with the constant-current source driver module respectively, the opening and closing of this control unit control constant-current source driver module and closing module.From as can be seen last, present embodiment changes the M1 among Fig. 5, M2 into the NMOS pipe by the PMOS pipe, and the 3rd NMOS pipe M2 connects with source end follower form.When opening pliotron Q1, control unit is closed the 4th NMOS pipe M4 and the 5th NMOS pipe M3, so just makes the 2nd NMOS pipe M1 and the 3rd NMOS pipe M2 open, thereby provides constant electric current output by the 3rd NMOS pipe M2 pipe for pliotron Q1.When closing pliotron Q1, control unit is opened earlier the 4th NMOS pipe M4, and the grid voltage of M1, M2 pipe is pulled low to earth potential, in order to closing constant-current source, and opens the 5th NMOS and manage M3 after surpassing preset time, thereby close pliotron Q1.In the present embodiment, because this moment, the 5th NMOS pipe M3 adopted low pressure process to realize, can realize under less area very easily that therefore very low conducting internal resistance is to meet design requirement.Preferably, also comprise the clamping voltage source V1 that is connected between the 2nd NMOS pipe M1 and the ground in this embodiment, can guarantee that by the magnitude of voltage that voltage source V 1 is set the voltage of lead-out terminal OUT can not surpass voltage V1 simultaneously in order to determine output current, also is in a safe condition when M3 adopts low pressure MOSFET in order to guarantee that the 5th NMOS manages.Preferably, also comprise the Dead Time control module between the grid that is connected control unit and the 5th NMOS pipe, this dead band time control module has predeterminable time of delay, the Dead Time control module sends to control signal the grid of the 5th NMOS pipe M3 after surpassing predetermined time of delay, open the 5th NMOS pipe M3.
By the novel pliotron drive circuit that the present invention proposes, need not to increase just direct driving power triode of any peripheral component, provide cost savings, improved the range of application of pliotron.And the present invention has also reduced switching loss in the switching speed of bring to power triode.The constant-current source driver module of uniqueness of the present invention and closing module can utilize the highest voltage endurance of pliotron with the safety of guaranteed output triode during switch in addition.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (13)
1. a pliotron drive circuit is characterized in that, comprising:
The constant-current source driver module and the closing module of series connection, the base stage of pliotron is connected between described constant-current source driver module and the closing module; And in described constant-current source driver module, constant-current source is arranged, provide constant base current with base stage when opening described pliotron for described pliotron, described closing module ground connection, with when closing described pliotron with the base stage short circuit of described pliotron.
2. pliotron drive circuit as claimed in claim 1, it is characterized in that, described constant-current source driver module comprises first constant-current source and first switch of series connection, described closing module comprises second switch, described first switch and the series connection of described second switch, the base stage of described pliotron is connected between described first switch and the described second switch, and described second switch ground connection.
3. pliotron drive circuit as claimed in claim 1, it is characterized in that, described constant-current source driver module comprises first current mirror of being made up of PMOS pipe and the 2nd PMOS pipe, controls the 3rd switch of described first current mirror and is second constant-current source that described first current mirror is powered; Described closing module comprises the NMOS pipe that is connected between described pliotron base stage and the ground.
4. pliotron drive circuit as claimed in claim 1, it is characterized in that, also comprise respectively the described control unit that links to each other with described closing module with described constant-current source driver module, described control unit is controlled the opening and closing of described constant-current source driver module and described closing module.
5. pliotron drive circuit as claimed in claim 4, it is characterized in that, described constant-current source driver module comprises second current mirror of being made up of the 2nd NMOS pipe and the 3rd NMOS pipe, and the 4th NMOS that controls described second current mirror manages and be the 3rd constant-current source of described second current mirror power supply; Described closing module comprises the 5th NMOS pipe; Wherein, the grid of described the 4th NMOS pipe and the 5th NMOS pipe is controlled by control unit.
6. pliotron drive circuit as claimed in claim 5, it is characterized in that, also comprise the clamping voltage source that is connected between described the 2nd NMOS pipe and the ground, be used for the base stage of the described pliotron of clamp, make described base stage be no more than the voltage in described clamping voltage source.
7. pliotron drive circuit as claimed in claim 5, it is characterized in that, also comprise the Dead Time control module between the grid that is connected described control unit and described the 5th NMOS pipe, described Dead Time control module has predeterminable time of delay, described Dead Time control module will send to the grid of described the 5th NMOS pipe from the control signal that described control unit receives after surpassing described time of delay.
8. driving method, it is characterized in that, the pliotron drive circuit comprises the constant-current source driver module and the closing module of series connection, and the base stage of described pliotron is connected between described constant-current source driver module and the closing module, said method comprising the steps of:
When opening described pliotron, open described constant-current source driver module and close described closing module, so that the constant-current source in the described constant-current source driver module provides constant base current for the base stage of pliotron;
When closing described pliotron, close described constant-current source driver module and open described closing module, with by of the base stage short circuit of described closing module described pliotron.
9. driving method as claimed in claim 8, it is characterized in that, described constant-current source driver module comprises first constant-current source and first switch of series connection, described closing module comprises second switch, described first switch and the series connection of described second switch, the base stage of described pliotron is connected between described first switch and the described second switch, and described second switch ground connection, when opening described pliotron, open described first switch and close described second switch; When closing described pliotron, close described first switch and open described second switch.
10. driving method as claimed in claim 8, it is characterized in that, described constant-current source driver module comprises first current mirror of being made up of PMOS pipe and the 2nd PMOS pipe, control the 3rd switch of described first current mirror and be second constant-current source of described first current mirror power supply, described closing module comprises the NMOS pipe that is connected between described pliotron base stage and the ground, when opening described pliotron, described control unit is closed described the 4th NMOS pipe and described the 5th NMOS pipe; When closing described pliotron, described control unit is at first opened described the 4th NMOS pipe, and opens described the 5th NMOS pipe after surpassing the scheduled time.
11. driving method as claimed in claim 8, it is characterized in that, also comprise respectively the described control unit that links to each other with described closing module with described constant-current source driver module, described control unit is controlled the opening and closing of described constant-current source driver module and described closing module, wherein, described constant-current source driver module comprises second current mirror of being made up of the 2nd NMOS pipe and the 3rd NMOS pipe, the 4th NMOS that controls described second current mirror manages and is the 3rd constant-current source of described second current mirror power supply, described closing module comprises the 5th NMOS pipe, wherein, the grid of described the 4th NMOS pipe and the 5th NMOS pipe is controlled by control unit.
12. driving method as claimed in claim 11, it is characterized in that, described pliotron drive circuit also comprises the clamping voltage source that is connected between described the 2nd NMOS pipe and the ground, is used for the base stage of the described pliotron of clamp, makes described base stage be no more than the voltage in described clamping voltage source.
13. driving method as claimed in claim 11, it is characterized in that, described pliotron drive circuit also comprises the Dead Time control module between the grid that is connected described control unit and described the 5th NMOS pipe, described Dead Time control module has predeterminable time of delay, after surpassing described time of delay, will send to the grid of described the 5th NMOS pipe from the control signal that described control unit receives.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101700522A CN102006052A (en) | 2009-09-01 | 2009-09-01 | Power triode drive circuit and driving method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101700522A CN102006052A (en) | 2009-09-01 | 2009-09-01 | Power triode drive circuit and driving method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957304A (en) * | 2011-08-29 | 2013-03-06 | 比亚迪股份有限公司 | Driving circuit of triode and driving method thereof |
| CN104617751A (en) * | 2015-02-03 | 2015-05-13 | 辉芒微电子（深圳）有限公司 | Audion drive circuit and drive method |
| CN107919792A (en) * | 2017-11-23 | 2018-04-17 | 杰华特微电子（杭州）有限公司 | A kind of transistor drive circuit, driving method and Switching Power Supply |
| CN114614808A (en) * | 2022-03-16 | 2022-06-10 | 上海南麟集成电路有限公司 | Power tube driving circuit |
-
2009
- 2009-09-01 CN CN2009101700522A patent/CN102006052A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102957304A (en) * | 2011-08-29 | 2013-03-06 | 比亚迪股份有限公司 | Driving circuit of triode and driving method thereof |
| CN102957304B (en) * | 2011-08-29 | 2016-04-27 | 比亚迪股份有限公司 | A kind of drive circuit of triode and driving method thereof |
| CN104617751A (en) * | 2015-02-03 | 2015-05-13 | 辉芒微电子（深圳）有限公司 | Audion drive circuit and drive method |
| CN107919792A (en) * | 2017-11-23 | 2018-04-17 | 杰华特微电子（杭州）有限公司 | A kind of transistor drive circuit, driving method and Switching Power Supply |
| CN107919792B (en) * | 2017-11-23 | 2023-08-29 | 杰华特微电子股份有限公司 | Triode driving circuit, driving method and switching power supply |
| CN114614808A (en) * | 2022-03-16 | 2022-06-10 | 上海南麟集成电路有限公司 | Power tube driving circuit |
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Application publication date: 20110406 |