CN103337944B - A kind of drive circuit fed back with overcurrent protection and overcurrent - Google Patents
A kind of drive circuit fed back with overcurrent protection and overcurrent Download PDFInfo
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- CN103337944B CN103337944B CN201310229655.1A CN201310229655A CN103337944B CN 103337944 B CN103337944 B CN 103337944B CN 201310229655 A CN201310229655 A CN 201310229655A CN 103337944 B CN103337944 B CN 103337944B
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Abstract
The invention discloses a kind of drive circuit fed back with overcurrent protection and overcurrent, be made up of low-side driver circuitry, current foldback circuit, over-current state signaling conversion circuit, described low-side driver circuitry mainly comprises triode Q2 and resistance, and described Q2 base stage is connected with drive singal by R5, R4 successively; Described current foldback circuit is made up of triode Q3 and resistance R7, and the emitter of the base stage Q2 of Q3 is connected, and the Base-Emitter of Q3 is in parallel with resistance R7, the grounded emitter of Q3, and the collector electrode of Q3 is connected with the collector electrode of R5, R4, Q1 respectively; Described over-current state signaling conversion circuit is made up of triode Q1, voltage-stabiliser tube D1 and resistance R1, R2, R4, and the collector electrode of Q1 is connected with R1 with D1 negative electrode, and the anode of D1 is connected with R2.Drive circuit of the present invention, the small area analysis signal drive circuit adopting discrete device to form can realize overcurrent protection and overcurrent information feed back, significantly reduces production cost.
Description
Technical field
The present invention relates to technical field of electric control, particularly relate to a kind of drive circuit fed back with overcurrent protection and overcurrent.
Background technology
Along with all fields of national economy and the national defense industry requirement for transformation of electrical energy and process improves constantly, and will meet demand that is energy-conservation and new energy development, the power semiconductor as electrical energy changer core component also plays a part more and more important.Power electronic device is formed different Power Electronic Circuit with different circuit topologies, realizes various transformation of electrical energy and controlling functions.In order to enable Power Electronic Circuit stable operation and provide excellent electric energy, need to drive reliably power electronic device, control and protection.In the signal drive circuit of current small area analysis most adopt be integrated chip or use discrete device and do not have over-current signal to feed back, this circuit realiration overcurrent protection of cost degradation and the information feed back to over-current state.
Summary of the invention
Technical problem to be solved by this invention is a kind of small area analysis signal drive circuit with the information feed back of overcurrent protection and over-current state proposed for above-mentioned prior art defect.
The required technical problem solved of the present invention can be achieved through the following technical solutions:
A kind of drive circuit fed back with overcurrent protection and overcurrent, by low-side driver circuitry, current foldback circuit, over-current state signaling conversion circuit forms, described low-side driver circuitry mainly comprises triode Q2 and resistance R4, R5, R6, described triode Q2 base stage is connected with drive singal by resistance R5, R4 successively, and drive singal is by resistance R6 ground connection, and the collector electrode of triode Q2 is connected with driving port; Described current foldback circuit is made up of triode Q3, resistance R7, the base stage of described triode Q3 is connected with the emitter of resistance R7, triode Q2, the emitter of triode Q2 is by resistance R7 ground connection, and the collector electrode of described triode Q3 is connected with resistance R5, R4 respectively; Described over-current state signaling conversion circuit is made up of triode Q1, voltage-stabiliser tube D1 and resistance R1, R2, R3, the base stage of described triode Q1 is connected with drive singal by resistance R3, the emitter of triode Q1 is connected with the collector electrode of triode Q3, the collector electrode of triode Q1 is connected with the negative electrode of voltage-stabiliser tube D1 with resistance R1, and the anode of voltage-stabiliser tube D1 is connected with resistance R2 with over-current state signal.
Described resistance R7 is over-current detection resistance.
Described triode Q3 and Q1 with the use of, form a multiple tube, when having drive singal and have overcurrent to occur, accelerate the open-minded of triode Q1.
Described over-current state signaling conversion circuit adds voltage-stabiliser tube D1, guarantees over-current state signal stabilization.
Described triode Q3 and Q1, Q2 open the shutoff controlling triode Q1 conducting and triode Q2 with the use of, triode Q3.
Beneficial effect of the present invention is: a kind of drive circuit fed back with overcurrent protection and overcurrent, the small area analysis signal drive circuit adopting discrete device to form, can realize overcurrent protection and overcurrent information feed back, effectively reduce production cost.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention will be further described:
Fig. 1 is drive circuit figure of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Describe the present invention in detail below with reference to Fig. 1, a kind of drive circuit fed back with overcurrent protection and overcurrent, is made up of low-side driver circuitry, current foldback circuit, over-current state signaling conversion circuit.Low-side driver circuitry mainly comprises triode Q2 and resistance R4, R5, R6, and drive singal is connected through the base stage of R5, R4 and Q2 successively, and drive singal is by resistance R6 ground connection, and the collector electrode of Q2 is connected with driving port; Current foldback circuit is made up of triode Q3 and resistance R7, and the emitter of the base stage Q2 of Q3 is connected, and the Base-Emitter of Q3 is in parallel with resistance R7, the grounded emitter of Q3, and the collector electrode of Q3 is connected with the collector electrode of R5, R4, Q1 respectively; Over-current state signaling conversion circuit is made up of triode Q1, voltage-stabiliser tube D1 and resistance R1, R2, R3, the base stage of Q1 is connected with drive singal by resistance R3, the collector electrode of Q1 is connected with power supply by R1, the collector electrode of Q1 is also connected to the ground by voltage-stabiliser tube D1 and R2, and the anode of voltage-stabiliser tube D1 is connected with overload signal.
During concrete operations, when there being drive singal, triode Q2 conducting, if do not have overcurrent to occur, triode Q3, triode Q1 not conductings, over-current state signal is high level, drives port to export low voltage drive signal.If generation overcurrent, triode Q3 and Q1 with the use of, form multiple tube, triode Q3 conducting, makes Q2 turn off, Q1 conducting, drive port output high level, over-current state signal is low level.If the power of over-current detection resistance is smaller, multiple same model resistor coupled in parallel can be adopted to use, reduce the loss of single detection resistance.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (5)
1. the drive circuit fed back with overcurrent protection and overcurrent, by low-side driver circuitry, current foldback circuit, over-current state signaling conversion circuit forms, it is characterized in that: described low-side driver circuitry mainly comprises triode Q2 and resistance R4, R5, R6, described triode Q2 base stage is connected with drive singal by resistance R5, R4 successively, and drive singal is by resistance R6 ground connection, and the collector electrode of triode Q2 is connected with driving port; Described current foldback circuit is made up of triode Q3, resistance R7, the base stage of described triode Q3 is connected with the emitter of resistance R7, triode Q2, the emitter of triode Q2 is by resistance R7 ground connection, and the collector electrode of described triode Q3 is connected with resistance R5, R4 respectively; Described over-current state signaling conversion circuit is made up of triode Q1, voltage-stabiliser tube D1 and resistance R1, R2, R3, the base stage of described triode Q1 is connected with drive singal by resistance R3, the emitter of triode Q1 is connected with the collector electrode of triode Q3, the collector electrode of triode Q1 is connected with the negative electrode of voltage-stabiliser tube D1 with resistance R1, and the anode of voltage-stabiliser tube D1 is connected with resistance R2 with over-current state signal.
2., according to a kind of drive circuit fed back with overcurrent protection and overcurrent according to claim 1, it is characterized in that: described resistance R7 is over-current detection resistance.
3., according to a kind of drive circuit with overcurrent protection and overcurrent feedback according to claim 1, it is characterized in that: described triode Q3 and Q1 with the use of, forms a multiple tube, when having drive singal and have overcurrent to occur, acceleration triode Q1's is open-minded.
4., according to a kind of drive circuit fed back with overcurrent protection and overcurrent according to claim 1, it is characterized in that: described over-current state signaling conversion circuit adds voltage-stabiliser tube D1, guarantees over-current state signal stabilization.
5., according to a kind of drive circuit with overcurrent protection and overcurrent feedback according to claim 1, it is characterized in that: described triode Q3 and Q1, Q2 open the shutoff controlling triode Q1 conducting and triode Q2 with the use of, triode Q3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310229655.1A CN103337944B (en) | 2013-06-09 | 2013-06-09 | A kind of drive circuit fed back with overcurrent protection and overcurrent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310229655.1A CN103337944B (en) | 2013-06-09 | 2013-06-09 | A kind of drive circuit fed back with overcurrent protection and overcurrent |
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| Publication Number | Publication Date |
|---|---|
| CN103337944A CN103337944A (en) | 2013-10-02 |
| CN103337944B true CN103337944B (en) | 2015-12-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310229655.1A Active CN103337944B (en) | 2013-06-09 | 2013-06-09 | A kind of drive circuit fed back with overcurrent protection and overcurrent |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111276935A (en) * | 2020-02-28 | 2020-06-12 | 联合汽车电子有限公司 | Overcurrent diagnosis processing circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037809A (en) * | 1988-05-20 | 1989-12-06 | 施木贵 | The driving switch circuit |
| US6842064B2 (en) * | 2003-04-09 | 2005-01-11 | Mitsubishi Denki Kabushiki Kaisha | Overcurrent protection and masking circuitry for protection against an overcurrent condition |
| CN203415962U (en) * | 2013-06-09 | 2014-01-29 | 安徽艾可蓝节能环保科技有限公司 | A driving circuit containing overcurrent protection and overcurrent feedback |
-
2013
- 2013-06-09 CN CN201310229655.1A patent/CN103337944B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037809A (en) * | 1988-05-20 | 1989-12-06 | 施木贵 | The driving switch circuit |
| US6842064B2 (en) * | 2003-04-09 | 2005-01-11 | Mitsubishi Denki Kabushiki Kaisha | Overcurrent protection and masking circuitry for protection against an overcurrent condition |
| CN203415962U (en) * | 2013-06-09 | 2014-01-29 | 安徽艾可蓝节能环保科技有限公司 | A driving circuit containing overcurrent protection and overcurrent feedback |
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| Publication number | Publication date |
|---|---|
| CN103337944A (en) | 2013-10-02 |
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Address after: 247000 Guichi Industrial Park, Anhui, Chizhou Patentee after: ACTBLUE CO., LTD. Address before: 247000 Guichi Industrial Park, Anhui, Chizhou Patentee before: Anhui ActBlue Co., Ltd. |
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Denomination of invention: Drive circuit with function of overcurrent protection and overcurrent feedback Effective date of registration: 20170505 Granted publication date: 20151202 Pledgee: China Co truction Bank Corp Chizhou branch Pledgor: ACTBLUE CO., LTD. Registration number: 2017340000057 |
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Date of cancellation: 20200916 Granted publication date: 20151202 Pledgee: China Co. truction Bank Corp Chizhou branch Pledgor: ANHUI ACT-BLUE ENVIRONMENTAL PROTECTION Co.,Ltd. Registration number: 2017340000057 |