CN202798631U - Automobile electronic power switch circuit - Google Patents
Automobile electronic power switch circuit Download PDFInfo
- Publication number
- CN202798631U CN202798631U CN 201220506827 CN201220506827U CN202798631U CN 202798631 U CN202798631 U CN 202798631U CN 201220506827 CN201220506827 CN 201220506827 CN 201220506827 U CN201220506827 U CN 201220506827U CN 202798631 U CN202798631 U CN 202798631U
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- circuit
- integrated chip
- effect transistor
- field effect
- microcontroller
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- Expired - Fee Related
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Abstract
The utility model discloses an automobile electronic power switch circuit, comprising a microcontroller and a field-effect tube integrated chip. The high-edge switch state output port of the field-effect tube integrated chip is connected with the input port of the microcontroller via a protection circuit, and the output port of the microcontroller is connected with the low-edge switch and high-edge switch control input port of the field-effect tube integrated chip via an isolating circuit; a pull-up circuit is connected on the protection circuit and the high-edge switch state output port of the field-effect tube integrated chip, and a pull-down circuit is connected on the isolating circuit and the low-edge switch and high-edge switch control input port of the field-effect tube integrated chip. The automobile electronic power switch circuit of the utility model solves the problems that a pull arc phenomenon occurs during an action process, relay contacts are easy to adhere, an electronic control unit can not control the relay to break reliably, a control driving current is larger, etc., caused by that an automobile electronic power switch uses a relay as a power switch device.
Description
Technical field
The utility model relates to the vehicle power switch circuit, relates in particular to a kind of automotive electronics power switch circuit.
Background technology
The device for power switching of present automotive electronics power switch uses relay to form usually, because the compositing characteristic of relay, cause the automotive electronics power switch to have following shortcoming, relay has the arcing phenomenon to occur in course of action, even adding arc extinguishing electric capacity also can't eliminate fully, relay contact bonds easily, so that the uncontrollable relay of electronic control unit reliably disconnects, the control drive current reaches more greatly the 50-150 milliampere.
Summary of the invention
The technical problems to be solved in the utility model: a kind of automotive electronics power switch circuit is provided, there is the arcing phenomenon to occur to solve in the course of action that the automotive electronics power switch uses relay to exist as device for power switching, relay contact bonds easily, so that the uncontrollable relay of electronic control unit reliably disconnects, control the problems such as drive current is larger.
Technical solutions of the utility model:
A kind of automotive electronics power switch circuit; it comprises microcontroller and field effect transistor integrated chip; field effect transistor integrated chip flash on off state output port is connected with the microcontroller input port by protective circuit; the microcontroller output port is connected with flash switch control inputs port with field effect transistor integrated chip lower edge switch by buffer circuit; be connected with pull-up circuit in protective circuit and field effect transistor integrated chip flash on off state output port, be connected with pull-down circuit at buffer circuit and field effect transistor integrated chip lower edge switch and flash switch control inputs port.
Be connected to filter circuit on the drain electrode of the flash switch of field effect transistor integrated chip and the positive source input port.
Be connected to filtering shaping circuit between the source electrode of field effect transistor integrated chip lower edge switch and the microcontroller voltage signal input sample port.
The beneficial effects of the utility model:
The utility model uses relay to change the field effect transistor integrated chip into the device for power switching of automotive electronics power switch usually, adopt microcontroller to control its output, overcome and used relay as the shortcoming of automotive electronics device for power switching, having solved in the course of action of automotive electronics power switch use relay as the device for power switching existence has the arcing phenomenon to occur, relay contact bonds easily, so that the uncontrollable relay of electronic control unit reliably disconnects, control the problems such as drive current is larger.
Description of drawings:
Fig. 1 the utility model the electric circuit constitute schematic diagram.
Embodiment:
A kind of automotive electronics power switch circuit; it comprises (see figure 1) microcontroller and field effect transistor integrated chip; field effect transistor integrated chip flash on off state output port is connected with the microcontroller input by protective circuit; the microcontroller output port is connected with flash switch control inputs port with field effect transistor integrated chip lower edge switch by buffer circuit; be connected with pull-up circuit in protective circuit and field effect transistor integrated chip flash on off state output port; be connected with pull-down circuit at buffer circuit and field effect transistor integrated chip lower edge switch and flash switch input terminal mouth; be connected to filter circuit on the flash drain electrode of field effect transistor integrated chip and the positive source input port, the source electrode of field effect transistor integrated chip lower edge switch and the input of microcontroller voltage signal gather between the port and are connected to filtering shaping circuit.Finally by the transmission of field effect transistor integrated chip power ratio control, reach the replacement tradition and use relay as the effect of device for power switching.
Protective circuit adopts resistance to form, and reaches current limliting, isolation and attenuated signal intensity with the effect of protection microcontroller.
Pull-up circuit: adopt resistance to form, resistance one termination power is opened Lou output because field effect transistor integrated chip flash on off state output port adopts, the special pull-up circuit that increases.
Pull-down circuit: adopt resistance to form, because microcontroller has the time-delay of startup process after powering on, in order to allow the microcontroller output port be in a fixing level, stablize output state, so increase pull-down circuit.
Filtering shaping circuit: formed by ceramic disc capacitor, resistance, voltage signal is carried out filtering, shaping, so that it is relatively stable to be transferred to the voltage signal of microcontroller sampling input port.
Filter circuit: be comprised of ceramic disc capacitor, electrochemical capacitor, diode, Transient Suppression Diode, can reduce the ripple that power supply is input to this circuit, filtering high-voltage pulse wave interference reaches the effect of protection field effect transistor integrated chip.
Buffer circuit: be constituted by a diode, can allow the control signal one-way transmission of microcontroller; The interference that the blocking-up power control section is divided is transmitted to microcontroller; Reach the effect of protection microcontroller output port.
Claims (3)
1. automotive electronics power switch circuit; it comprises microcontroller and field effect transistor integrated chip; it is characterized in that: field effect transistor integrated chip flash on off state output port is connected with the microcontroller input port by protective circuit; the microcontroller output port is connected with flash switch control inputs port with field effect transistor integrated chip lower edge switch by buffer circuit; be connected with pull-up circuit in protective circuit and field effect transistor integrated chip flash on off state output port, be connected with pull-down circuit at buffer circuit and field effect transistor integrated chip lower edge switch and flash switch control inputs port.
2. a kind of automotive electronics power switch circuit according to claim 1 is characterized in that: be connected to filter circuit on the drain electrode of the flash switch of field effect transistor integrated chip and the positive source input port.
3. a kind of automotive electronics power switch circuit according to claim 1 is characterized in that: be connected to filtering shaping circuit between the source electrode of field effect transistor integrated chip lower edge switch and the microcontroller voltage signal input sample port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220506827 CN202798631U (en) | 2012-09-29 | 2012-09-29 | Automobile electronic power switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220506827 CN202798631U (en) | 2012-09-29 | 2012-09-29 | Automobile electronic power switch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202798631U true CN202798631U (en) | 2013-03-13 |
Family
ID=47825800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220506827 Expired - Fee Related CN202798631U (en) | 2012-09-29 | 2012-09-29 | Automobile electronic power switch circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202798631U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406850A (en) * | 2014-09-05 | 2016-03-16 | 英飞凌科技股份有限公司 | Semiconductor Switch With Integrated Temperature Sensor |
| CN110994544A (en) * | 2019-04-30 | 2020-04-10 | 宁德时代新能源科技股份有限公司 | Active fuse control method and circuit, first and second control device |
-
2012
- 2012-09-29 CN CN 201220506827 patent/CN202798631U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406850A (en) * | 2014-09-05 | 2016-03-16 | 英飞凌科技股份有限公司 | Semiconductor Switch With Integrated Temperature Sensor |
| CN105406850B (en) * | 2014-09-05 | 2018-09-21 | 英飞凌科技股份有限公司 | semiconductor switch with integrated temperature sensor |
| CN110994544A (en) * | 2019-04-30 | 2020-04-10 | 宁德时代新能源科技股份有限公司 | Active fuse control method and circuit, first and second control device |
| CN110994544B (en) * | 2019-04-30 | 2021-10-08 | 宁德时代新能源科技股份有限公司 | Active fuse control method and circuit, first and second control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20180929 |