CN204333899U - A kind of alternative fuse control circuit - Google Patents
A kind of alternative fuse control circuit Download PDFInfo
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- CN204333899U CN204333899U CN201420840794.8U CN201420840794U CN204333899U CN 204333899 U CN204333899 U CN 204333899U CN 201420840794 U CN201420840794 U CN 201420840794U CN 204333899 U CN204333899 U CN 204333899U
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Abstract
This practicality discloses and a kind of substitutes fuse control circuit, the output of isolation photoelectric coupled circuit Q1 comprise metal-oxide-semiconductor circuit, being connected with metal-oxide-semiconductor circuitry gate; Metal-oxide-semiconductor circuit source electrode connects power supply; one end of load is connected to the drain electrode of metal-oxide-semiconductor circuit; the input of the isolation photoelectric coupled circuit Q2 of the other end connection of load; the input signal of the input connection control isolation photoelectric coupled circuit Q1 of described isolation photoelectric coupled circuit Q1; signal is inputed to external MCU by the output of isolation photoelectric coupled circuit Q2; metal-oxide-semiconductor circuit is utilized to carry out alternative fuse circuit; because its working curve of metal-oxide-semiconductor is linear; therefore it is once current overload; its reaction can be closed in 2uS in action; its rear end electronic component can not have damage, can reliably protecting electronic component.
Description
Technical field
This practicality relates to straight-bar machines control protection electric circuit, particularly relates to a kind of alternative fuse control circuit.
Background technology
Existing straight-bar machines control protection electric circuit, adopts traditional a kind of fusible link to protect load, is commonly called as fuse.Its defect mainly existed or deficiency are: protective reaction is slow, and fusible link open circuit load below by the time also damages substantially; Maintenance trouble, once this product wants depot repair after there is the open circuit of over-current phenomenon avoidance fusible link; Volume is large, takies PCB surface long-pending many, therefore traditional technology its have received restriction in the application of straight-bar machines control field.
Utility model content
For above-mentioned technological deficiency, this practicality proposes a kind of alternative fuse control circuit.
In order to solve the problems of the technologies described above, the technical scheme of this practicality is as follows:
A kind of substitute fuse control circuit, the output of isolation photoelectric coupled circuit Q1 comprise metal-oxide-semiconductor circuit, being connected with metal-oxide-semiconductor circuitry gate; Metal-oxide-semiconductor circuit source electrode connects power supply, one end of load is connected to the drain electrode of metal-oxide-semiconductor circuit, the input of the isolation photoelectric coupled circuit Q2 of the other end connection of load, the input signal of the input connection control isolation photoelectric coupled circuit Q1 of described isolation photoelectric coupled circuit Q1, signal is inputed to external MCU by the output of isolation photoelectric coupled circuit Q2.
Further, the output of described isolation photoelectric coupled circuit Q1 is connected to the grid of metal-oxide-semiconductor circuit by divider resistance.
Further, the output of described isolation photoelectric coupled circuit Q2 and filter capacitor C1 and resistance R2 after connecing, input to external MCU.
Further, described metal-oxide-semiconductor circuit is metal-oxide-semiconductor and diode and connects.
The beneficial effect of this practicality is: utilize metal-oxide-semiconductor circuit to carry out alternative fuse circuit; because its working curve of metal-oxide-semiconductor is linear, therefore it is once current overload, and its reaction can be closed in 2uS in action; its rear end electronic component can not have damage, can reliably protecting electronic component.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of this practical embodiment.
Embodiment
Below in conjunction with the drawings and specific embodiments, this practicality is described further.
As shown in Figure 1, for convenience's sake, in Fig. 1, metal-oxide-semiconductor circuit have employed integrated intelligent switch pipe AUIPS2031R, is described.Intelligent switch pipe AUIPS2031R is load is the metal-oxide-semiconductor of meeting automatic cut-off power more than 8A electric current, reopen after needs 1 pin G drags down and draw high and could open.When ON/OFF draws high maintenance, AUIPS2031R just can be opened work.-24VFLOAD is that suitable fuse connects load one end, and-24V is equivalent to fuse to connect power supply one end.If ON draws high, when-24V_inform drags down, represent overcurrent, Signal transmissions is reported to the police to MSC, its physical circuit comprises intelligent switch AUIPS2031R .R1.R2.R3.R4.R5 and C1 and 2 the isolation light lotus root of IR, the output of the isolation photoelectric coupled circuit Q1 be connected with intelligent switch pipe AUIPS2031R grid; Intelligent switch pipe AUIPS2031R source electrode connects power supply, one end of load is connected to intelligent switch pipe AUIPS2031R and drains, the input of the isolation photoelectric coupled circuit Q2 of the other end connection of load, the input signal of the input connection control isolation photoelectric coupled circuit Q1 of described isolation photoelectric coupled circuit Q1, signal is inputed to external MCU by the output of isolation photoelectric coupled circuit Q2.In circuit diagram, described resistance R3.R4 is divider resistance; The even circuit O1 of isolation light is that the isolation light of control intelligent switch is even, and the even circuit O2 of isolation light is that short-circuit alarming is even to the isolation light of MCU; Preferably, the even circuit O1.O2 of isolation light adopts integrated TLP181GR, R2 be pull-up resistor C1 is filter capacitor.Described resistance R1 is 470 ohm, and R2 is 4.7K, R3 be 47K, R4 be 10K, R5 is 2K, and described electric capacity C1 is 104P.In the present embodiment, intelligent switch pipe AUIPS2031R can adopt metal-oxide-semiconductor and replace with diode the mode connect.
The above is only the preferred implementation of this practicality; it should be pointed out that for those skilled in the art, under the prerequisite not departing from this practicality design; can also make some improvements and modifications, these improvements and modifications also should be considered as in this practical protection range.
Claims (4)
1. an alternative fuse control circuit, is characterized in that, the output of isolation photoelectric coupled circuit Q1 comprise metal-oxide-semiconductor circuit, being connected with metal-oxide-semiconductor circuitry gate; Metal-oxide-semiconductor circuit source electrode connects power supply, one end of load is connected to the drain electrode of metal-oxide-semiconductor circuit, the input of the isolation photoelectric coupled circuit Q2 of the other end connection of load, the input signal of the input connection control isolation photoelectric coupled circuit Q1 of described isolation photoelectric coupled circuit Q1, signal is inputed to external MCU by the output of isolation photoelectric coupled circuit Q2.
2. one according to claim 1 substitutes fuse control circuit, it is characterized in that, the output of described isolation photoelectric coupled circuit Q1 is connected to the grid of metal-oxide-semiconductor circuit by divider resistance.
3. one according to claim 1 substitutes fuse control circuit, it is characterized in that, the output of described isolation photoelectric coupled circuit Q2 and filter capacitor C1 and resistance R2 also, after connecing, input to external MCU.
4. one according to claim 1 substitutes fuse control circuit, it is characterized in that, described metal-oxide-semiconductor circuit is metal-oxide-semiconductor and diode and connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420840794.8U CN204333899U (en) | 2014-12-26 | 2014-12-26 | A kind of alternative fuse control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420840794.8U CN204333899U (en) | 2014-12-26 | 2014-12-26 | A kind of alternative fuse control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204333899U true CN204333899U (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420840794.8U Active CN204333899U (en) | 2014-12-26 | 2014-12-26 | A kind of alternative fuse control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204333899U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716623A (en) * | 2014-12-26 | 2015-06-17 | 康奋威科技（杭州）有限公司 | Fuse substitute control circuit |
| CN107528288A (en) * | 2017-08-21 | 2017-12-29 | 深圳市华星光电技术有限公司 | The power circuit and display of a kind of display |
-
2014
- 2014-12-26 CN CN201420840794.8U patent/CN204333899U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104716623A (en) * | 2014-12-26 | 2015-06-17 | 康奋威科技（杭州）有限公司 | Fuse substitute control circuit |
| CN104716623B (en) * | 2014-12-26 | 2019-07-26 | 杭州康奋威科技股份有限公司 | A kind of substitution fuse control circuit |
| CN107528288A (en) * | 2017-08-21 | 2017-12-29 | 深圳市华星光电技术有限公司 | The power circuit and display of a kind of display |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 310053 Binjiang District East Road No. 1805 Patentee after: Hangzhou Comfirmware Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310053 Binjiang District East Road No. 1805 Patentee before: ConfirmWare Technology (Hangzhou) Incorporated |