CN202219735U - High-edge driving circuit with secondary turn-off protection capability - Google Patents
High-edge driving circuit with secondary turn-off protection capability Download PDFInfo
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- CN202219735U CN202219735U CN2011203513538U CN201120351353U CN202219735U CN 202219735 U CN202219735 U CN 202219735U CN 2011203513538 U CN2011203513538 U CN 2011203513538U CN 201120351353 U CN201120351353 U CN 201120351353U CN 202219735 U CN202219735 U CN 202219735U
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Abstract
The utility model discloses a high-edge driving circuit with a secondary turn-off protection capability, which comprises an amplifying circuit, a driving circuit, a feedback circuit and an analog dialogue (AD) detection circuit, wherein the amplifying circuit and the AD detection circuit are both connected with a microprogrammed control unit (MCU), the amplifying circuit is connected with the driving circuit which is connected onto a load, a lower edge of the load is connected with the ground, and the feedback circuit is respectively connected with the amplifying circuit and the driving circuit. The high-edge driving circuit with the secondary turn-off protection capability can completely replace an intelligent power driving chip, is added with the secondary turn-off protection capability on the basis of overcurrent protection and short circuit protection capabilities, and is flexible in application and low in cost.
Description
Technical field
The utility model belongs to auto body controller technology field, is specifically related to a kind of flash driving circuit with secondary turn-off protection ability.
Background technology
Along with the fast development and the keen competition of Automobile Electronic Industry, cost-cutting is the key point of automobile BCM exploitation under the prerequisite of guaranteeing product function and performance.Car body controller (BCM) requires all outputs all should have overcurrent, short-circuit protection ability.At present; Drive low-power load (like the outer relay line bag of pcb board, various indicator lamps etc.) the intelligent power chip for driving that adopt more; These power drive chips basically all are the import devices; Cost an arm and a leg and procurement cycle long, can't satisfy batch manufacturing and needs cheaply, this just need design the driving circuit that has protective capability cheaply.
The utility model content
The purpose of the utility model provides the flash driving circuit with secondary turn-off protection ability, can substitute the intelligent power chip for driving fully, on the basis of overcurrent, short-circuit protection ability, has increased the secondary turn-off protection, and applying flexible is with low cost.
To achieve these goals, the utility model adopts following technical scheme:
A kind of flash driving circuit with secondary turn-off protection ability; Wherein, comprise amplifying circuit, driving circuit, reactive circuit and AD testing circuit, said amplifying circuit all is connected with MCU with the AD testing circuit; Amplifying circuit connects driving circuit; Driving circuit is connected in the load, the low edge joint ground of load, and described reactive circuit is connected with driving circuit with amplifying circuit respectively.
Further, described amplifying circuit is a transistor amplifier.
Further, described driving circuit is a transistor drive circuit.
Further, described reactive circuit is an aerotron reactive circuit.
The beneficial effect of the utility model is:
It is exactly the low edge joint ground of load that flash drives; Decide load whether to work through the control flash; The utility model is the flash Drive Protecting Circuit that a standard is provided for low-power load, changes existing smart power chip drive pattern, farthest cost-cutting; And on the basis of overcurrent, short-circuit protection, increase secondary turn-off protection ability, greatly improve the cost performance of flash Drive Protecting Circuit.The utility model is mainly used in the flash driving circuit of low-power load; Relate to circuit theories such as amplifier, feedback, detection; The utility model is portable strong, on any a automobile BCM, uses after can revising partial parameters as required, has improved product development rate and work efficiency; Shorten the Products Development cycle, reduced cost of development.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model;
Fig. 2 is the schematic circuit diagram of the utility model.
The specific embodiment
Below through circuit analysis is done further description to the utility model design:
Like Fig. 1, shown in Figure 2; The utility model comprises MCU1, amplifying circuit 2, driving circuit 3, load 4, reactive circuit 5 and AD testing circuit 6; Amplifying circuit 2 all is connected with MCU1 with AD testing circuit 6, and amplifying circuit 2 connects driving circuit 3, and driving circuit 3 is connected in the load 4; The low edge joint ground of load 4, reactive circuit 5 are connected with driving circuit 3 with amplifying circuit 2 respectively.
As shown in Figure 2, this circuit of circuit is made up of transistor amplifier Q502, transistor drive circuit Q505, aerotron reactive circuit Q501, AD testing circuit etc.MCU exports a high level signal, transistor amplifier Q502 conducting work, and also conducting work of transistor drive circuit Q505 immediately, the load energising is started working; Excessive like electric current in the load circuit, aerotron reactive circuit Q501 conducting is closed, turns off transistor drive circuit Q505 then, and the load outage realizes protection; Load outage back aerotron reactive circuit Q501 breaks off, and still exports a high level like MCU, and then transistor amplifier Q502, transistor drive circuit Q505 open in succession, the load energising; Excessive or short circuit phenomenon arranged like electric current in the load circuit, aerotron reactive circuit Q501 conducting is closed, and the load outage realizes protection then, just so back and forth can form oscillating circuit.
This circuit reaches the power drive requirement through the dual amplifier of aerotron, and the front end aerotron can adopt the regular tap aerotron, and the rear end drives aerotron will use high-performance power discharging transistor; Detect the overcurrent condition in the load circuit through the AD testing circuit, thereby the high level of turning off MCU output avoids circuit to form vibration; Circuit not only has instantaneous hard protective capabilities such as overcurrent, short circuit, also has the AD detection and turns off the secondary turn-off protection ability of output.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Other modifications that those of ordinary skills make the technical scheme of the utility model perhaps are equal to replacement; Only otherwise break away from the spirit and the scope of the utility model technical scheme, all should be encompassed in the middle of the claim scope of the utility model.
Claims (4)
1. flash driving circuit with secondary turn-off protection ability; It is characterized in that: comprise amplifying circuit, driving circuit, reactive circuit and AD testing circuit; Said amplifying circuit all is connected with MCU with the AD testing circuit, and amplifying circuit connects driving circuit, and driving circuit is connected in the load; The low edge joint ground of load, described reactive circuit is connected with driving circuit with amplifying circuit respectively.
2. a kind of flash driving circuit with secondary turn-off protection ability according to claim 1, it is characterized in that: described amplifying circuit is a transistor amplifier.
3. a kind of flash driving circuit with secondary turn-off protection ability according to claim 1, it is characterized in that: described driving circuit is a transistor drive circuit.
4. a kind of flash driving circuit with secondary turn-off protection ability according to claim 1 is characterized in that: described reactive circuit is an aerotron reactive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203513538U CN202219735U (en) | 2011-09-20 | 2011-09-20 | High-edge driving circuit with secondary turn-off protection capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203513538U CN202219735U (en) | 2011-09-20 | 2011-09-20 | High-edge driving circuit with secondary turn-off protection capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202219735U true CN202219735U (en) | 2012-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203513538U Expired - Fee Related CN202219735U (en) | 2011-09-20 | 2011-09-20 | High-edge driving circuit with secondary turn-off protection capability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202219735U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505528A (en) * | 2017-01-05 | 2017-03-15 | 科蒂斯技术（苏州）有限公司 | The flash that a kind of employing discrete component is realized drives current foldback circuit |
| CN107891756A (en) * | 2017-11-10 | 2018-04-10 | 宁德时代新能源科技股份有限公司 | Switch driving circuit and method, driver, battery device, vehicle, and computer-readable storage medium |
| CN109270922A (en) * | 2018-10-30 | 2019-01-25 | 河南天海电器有限公司 | The automotive electronics formula power distribution unit of self diagnosis and self-contr ol |
| CN109494679A (en) * | 2018-11-23 | 2019-03-19 | 苏州绿控传动科技股份有限公司 | A kind of high side switches circuit with overcurrent protection and feedback control function |
-
2011
- 2011-09-20 CN CN2011203513538U patent/CN202219735U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505528A (en) * | 2017-01-05 | 2017-03-15 | 科蒂斯技术（苏州）有限公司 | The flash that a kind of employing discrete component is realized drives current foldback circuit |
| CN107891756A (en) * | 2017-11-10 | 2018-04-10 | 宁德时代新能源科技股份有限公司 | Switch driving circuit and method, driver, battery device, vehicle, and computer-readable storage medium |
| CN109270922A (en) * | 2018-10-30 | 2019-01-25 | 河南天海电器有限公司 | The automotive electronics formula power distribution unit of self diagnosis and self-contr ol |
| CN109494679A (en) * | 2018-11-23 | 2019-03-19 | 苏州绿控传动科技股份有限公司 | A kind of high side switches circuit with overcurrent protection and feedback control function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120516 Termination date: 20130920 |