CN203415962U - A driving circuit containing overcurrent protection and overcurrent feedback - Google Patents
A driving circuit containing overcurrent protection and overcurrent feedback Download PDFInfo
- Publication number
- CN203415962U CN203415962U CN201320332443.1U CN201320332443U CN203415962U CN 203415962 U CN203415962 U CN 203415962U CN 201320332443 U CN201320332443 U CN 201320332443U CN 203415962 U CN203415962 U CN 203415962U
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- triode
- resistance
- overcurrent
- driving circuit
- collector electrode
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Abstract
The utility model discloses a driving circuit containing overcurrent protection and overcurrent feedback. The driving circuit is composed of a low-end driving circuit, an overcurrent protection circuit, and an overcurrent status signal conversion circuit. The low-end driving circuit mainly comprises a triode Q2 and resistors. The base electrode of the Q2 is connected with a driving signal successively through a R5 and a R4. The overcurrent protection circuit is composed of a triode Q3 and a resistor R7. The base electrode of the Q3 is connected with the emitter electrode of the Q2. The base electrode and the emitter electrode of the Q3 are connected with the resistor R7 in parallel. The emitter electrode of the Q3 is connected with ground. The collector electrode of the Q3 is connected with the R5, the R4, and the collector electrode of the Q1. The overcurrent status signal conversion circuit is composed of a triode Q1, a voltage-stabilizing tube D1, and resistors R1, R2, and R4. The collector electrode of the Q1 is connected with the R1 and the cathode of the D1. The anode of the D1 is connected with R2. The low-current signal driving circuit formed by discrete elements may achieve overcurrent protection and overcurrent information feedback and effectively decrease production cost.
Description
Technical field
The utility model relates to Electrical Control Technology field, particularly relates to a kind of drive circuit with overcurrent protection and overcurrent feedback.
Background technology
Along with all fields of national economy and the national defense industry requirement for transformation of electrical energy and processing improves constantly, and to meet energy-conservation and demand new energy development, as the power semiconductor of electrical energy changer core component, also play a part more and more important.Power electronic device forms different Power Electronic Circuit with different circuit topologies, realizes various transformation of electrical energies and controls function.In order to make the Power Electronic Circuit can stable operation and good electric energy is provided, need to drive reliably power electronic device, control and protection.Most being integrated chip or using discrete device and do not have over-current signal feedback, this circuit to realize overcurrent protection and the information feedback to over-current state of cost degradation of adopting in the signal drive circuit of current little electric current.
Utility model content
Technical problem to be solved in the utility model is a kind of little current signal drive circuit with the information feedback of overcurrent protection and over-current state proposing for above-mentioned prior art defect.
The utility model requires the technical problem solving to be achieved through the following technical solutions:
A kind of drive circuit with overcurrent protection and overcurrent feedback, 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, described triode Q2 base stage is connected with driving signal by R5, R4 successively, drives signal by resistance R 6 ground connection, and the collector electrode of Q2 is connected with driving port; Described current foldback circuit is comprised of Q3, R7, and the base stage of described Q3 is connected with the emitter of R7, Q2, and the emitter of Q3 is by R7 ground connection, and the collector electrode of described Q3 is connected with R5, R4 respectively; Described over-current state signaling conversion circuit is comprised of triode Q1, voltage-stabiliser tube D1 and resistance, the base stage of described Q1 is connected with driving signal by resistance R 3, the emitter of Q1 is connected with the collector electrode of Q3, the collector electrode of Q1 is connected with the negative electrode of R1 and D1, and the anode of D1 is connected with R2 with over-current state signal.
Described resistance R 7 is over-current detection resistance.
Described Q3 and Q1 are used in conjunction with, and form a multiple tube, accelerate the open-minded of Q1 when having the signal of driving and having overcurrent to occur.
Described over-current state signaling conversion circuit has increased voltage-stabiliser tube D1, guarantees over-current state signal stabilization.
Described Q3 and Q1, Q2 are used in conjunction with, and Q3 opens the shutoff of controlling Q1 conducting and Q2.
The utility model beneficial effect is: a kind of drive circuit with overcurrent protection and overcurrent feedback, the little current signal drive circuit that adopts discrete device to form, can realize overcurrent protection and cross stream information feedback, effectively reduces production costs.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described further:
Fig. 1 is the utility model drive circuit figure.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Below with reference to Fig. 1, describe the utility model in detail, a kind of drive circuit with overcurrent protection and overcurrent feedback, is comprised of low-side driver circuitry, current foldback circuit, over-current state signaling conversion circuit.Low-side driver circuitry mainly comprises triode Q2 and resistance R 4, R5, R6, drives signal through R5, R4, to be connected with the base stage of Q2 successively, drives signal by resistance R 6 ground connection, and the collector electrode of Q2 is connected with driving port; Current foldback circuit is comprised of triode Q3 and resistance R 7, and the emitter of the base stage Q2 of Q3 is connected, and the Base-Emitter of Q3 is in parallel with resistance R 7, 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 comprised of triode Q1, voltage-stabiliser tube D1 and resistance R 1, R2, R3, the base stage of Q1 is connected with driving signal by resistance R 3, 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 having the signal of driving, triode Q2 conducting, if do not have overcurrent to occur, triode Q3, not conductings of triode Q1, over-current state signal is high level, drives port output low-voltage driving signal.If generation overcurrent, triode Q3 and Q1 are used in conjunction with, and form multiple tube, and triode Q3 conducting is turn-offed Q2, and Q1 conducting drives port output high level, and over-current state signal is low level.If the power of over-current detection resistance is smaller, can adopt the use in parallel of a plurality of same model resistance, reduce the loss of single detection resistance.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; under the prerequisite that does not depart from the utility model spirit and scope, the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (1)
1. the drive circuit with overcurrent protection and overcurrent feedback, 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, described triode Q2 base stage is connected by resistance R 5, resistance R 4 and driving signal successively, drives signal by resistance R 6 ground connection, and the collector electrode of triode Q2 is connected with driving port; Described current foldback circuit is comprised of triode Q3, resistance R 7, the base stage of described triode Q3 is connected with the emitter of resistance R 7, triode Q2, the emitter of triode Q3 is by resistance R 7 ground connection, and the collector electrode of described triode Q3 is connected with resistance R 5, resistance R 4 respectively; Described over-current state signaling conversion circuit is comprised of triode Q1, voltage-stabiliser tube D1 and resistance, the base stage of described triode Q1 is connected with driving signal by resistance R 3, 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 R 1, and the anode of voltage-stabiliser tube D1 is connected with resistance R 2 with over-current state signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320332443.1U CN203415962U (en) | 2013-06-09 | 2013-06-09 | A driving circuit containing overcurrent protection and overcurrent feedback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320332443.1U CN203415962U (en) | 2013-06-09 | 2013-06-09 | A driving circuit containing overcurrent protection and overcurrent feedback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203415962U true CN203415962U (en) | 2014-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320332443.1U Withdrawn - After Issue CN203415962U (en) | 2013-06-09 | 2013-06-09 | A driving circuit containing overcurrent protection and overcurrent feedback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203415962U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337944A (en) * | 2013-06-09 | 2013-10-02 | 安徽艾可蓝节能环保科技有限公司 | Drive circuit with function of overcurrent protection and overcurrent feedback |
-
2013
- 2013-06-09 CN CN201320332443.1U patent/CN203415962U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337944A (en) * | 2013-06-09 | 2013-10-02 | 安徽艾可蓝节能环保科技有限公司 | Drive circuit with function of overcurrent protection and overcurrent feedback |
| CN103337944B (en) * | 2013-06-09 | 2015-12-02 | 安徽艾可蓝节能环保科技有限公司 | A kind of drive circuit fed back with overcurrent protection and overcurrent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140129 Effective date of abandoning: 20151202 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |