CN220156696U - High-voltage protection circuit based on hardware - Google Patents
High-voltage protection circuit based on hardware Download PDFInfo
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- CN220156696U CN220156696U CN202321618872.5U CN202321618872U CN220156696U CN 220156696 U CN220156696 U CN 220156696U CN 202321618872 U CN202321618872 U CN 202321618872U CN 220156696 U CN220156696 U CN 220156696U
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- 238000011084 recovery Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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Abstract
The utility model provides a high-voltage protection circuit based on hardware, which comprises an MOS tube T1 connected in series with a car lamp device, wherein a grid electrode of the MOS tube T1 is electrically connected with a K port of a fast recovery diode IC1, a drain electrode of the MOS tube T1 is electrically connected with an A port of the fast recovery diode IC1, a resistor R2 and a resistor R3 are sequentially connected in series between the K port and the A port of the fast recovery diode IC1, an R port of the fast recovery diode IC1 is electrically connected between the resistor R2 and the resistor R4, a port VCC is electrically connected with an input end of a diode D1, and an output end of the diode D1 is electrically connected between the resistor R1 and the resistor R2. The utility model can effectively avoid the influence of high-voltage electric energy on the performance of the car lamp equipment and the MOS tube T1, improve the service performance and the service life of the car lamp power supply, realize the process without using an MCU and effectively reduce the production cost.
Description
Technical Field
The utility model relates to the technical field of car lamp power supply, in particular to a high-voltage protection circuit based on hardware.
Background
In a car lamp circuit of an automobile, for monitoring and controlling the running of car lamp equipment, the car lamp equipment is connected with an MOS tube in series, and a power module supplies power to the car lamp equipment and controls the MOS tube to be conducted. In the prior art, in order to improve the performance of car light and MOS pipe, set up the control MCU of monitoring power module's power supply voltage, when power module's power supply voltage was higher than the default, control MCU disconnection power supply reduced car light equipment and MOS pipe probability of damaging, but be equipped with control MCU and can increase the manufacturing cost of car light.
Disclosure of Invention
In view of the above, the utility model aims to provide a hardware-based high-voltage protection circuit, which can effectively avoid the influence of high-voltage electric energy on the performance of a car lamp device and a MOS tube T1, improve the service performance and service life of the car lamp power supply, and effectively reduce the production cost without using an MCU in the implementation process.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a high voltage protection circuit based on hardware, includes the MOS pipe T1 that concatenates with car light equipment, MOS pipe T1's grid is connected with quick recovery diode IC 1's K port electricity, MOS pipe T1's drain electrode is connected with quick recovery diode IC 1's A port electricity, between quick recovery diode IC 1's K port and the A port in proper order concatenate resistance R1, resistance R2 and resistance R3, quick recovery diode IC 1's R port electricity is connected to between resistance R2 and the resistance R4, port VCC is connected with diode D1's input electricity, and diode D1's output electricity is connected to between resistance R1 and the resistance R2.
Further, a resistor R3 and a diode D4 are respectively connected in series between the drain and the gate of the MOS transistor T1.
Further, the port VCC is electrically connected to the lamp device to supply power to the lamp device.
The utility model has the advantages and positive effects that:
through concatenating fast recovery diode IC1 between MOS pipe T1's grid and drain electrode, when the supply voltage of port VCC is higher than the setting value, fast recovery diode IC1 ground makes MOS pipe T1 disconnection, disconnect the connection of car light equipment and port VCC, and reduce MOS pipe T1 by the probability of puncture, can effectually avoid high voltage electric energy to influence the performance of car light equipment and MOS pipe T1, improve car light power supply performance and life-span, and realize this process need not to use MCU, effectual reduction in production cost.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:
fig. 1 is an overall circuit diagram of a hardware-based high voltage protection circuit of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The utility model provides a high-voltage protection circuit based on hardware, as shown in fig. 1, which comprises an MOS tube T1 connected in series with a car lamp device, wherein a grid electrode of the MOS tube T1 is electrically connected with a port VCC for providing electric energy, a drain electrode of the MOS tube T1 is electrically connected with a ground electrode, a resistor R3 and a diode D4 are respectively connected in series between the drain electrode and the grid electrode of the MOS tube T1, and the voltage of the grid electrode of the MOS tube T1 can be improved.
The port VCC supplies power to the car light equipment and controls the MOS tube T1 to be conducted simultaneously, when the voltage supplied by the port VCC is higher than the preset voltage due to interference, the MOS tube T1 is prevented from being broken down, the fast recovery diode IC1 is connected between the grid electrode and the drain electrode of the MOS tube T1 in series, the MOS tube T1 can be disconnected in time, and the breakdown probability of the MOS tube T1 is reduced.
The grid electrode of the MOS tube T1 is electrically connected with the K port of the fast recovery diode IC1, the drain electrode of the MOS tube T1 is electrically connected with the A port of the fast recovery diode IC1, a resistor R2 and a resistor R3 are sequentially connected in series between the K port and the A port of the fast recovery diode IC1, the R port of the fast recovery diode IC1 is electrically connected between the resistor R2 and the resistor R4, the port VCC is electrically connected with the input end of the diode D1, and the output end of the diode D1 is electrically connected between the resistor R1 and the resistor R2.
When the circuit operates and the port VCC normally provides electric energy, current sequentially passes through the diode D1, the resistor R1 and the grid electrode of the MOS tube T1, the MOS tube T1 is conducted, and the car lamp equipment normally works.
When the port VCC provides too high power, the current flowing through the resistor R2 and the resistor R3 increases, so that the R-port voltage of the fast recovery diode IC1 is higher than the reference voltage, the fast recovery diode IC1 is broken down, the gate of the MOS transistor T1 is grounded, and the MOS transistor T1 is not conductive. When the power supplied by the port VCC is normal, the fast recovery diode IC1 recovers and the MOS transistor T1 is normally turned on.
Can effectually avoid high-voltage electric energy to influence the performance of car light equipment and MOS pipe T1, improve car light power supply performance and life-span, and realize this process and need not to use MCU, effectual reduction in production cost.
The foregoing describes the embodiments of the present utility model in detail, but the description is only a preferred embodiment of the present utility model and should not be construed as limiting the scope of the utility model. All equivalent changes and modifications within the scope of the present utility model are intended to be covered by this patent.
Claims (3)
1. The high-voltage protection circuit based on hardware is characterized by comprising an MOS tube T1 connected in series with a car lamp device, wherein a grid electrode of the MOS tube T1 is electrically connected with a K port of a fast recovery diode IC1, a drain electrode of the MOS tube T1 is electrically connected with an A port of the fast recovery diode IC1, a resistor R2 and a resistor R3 are sequentially connected in series between the K port and the A port of the fast recovery diode IC1, an R port of the fast recovery diode IC1 is electrically connected between the resistor R2 and the resistor R4, a port VCC for supplying power is electrically connected with an input end of a diode D1, and an output end of the diode D1 is electrically connected between the resistor R1 and the resistor R2.
2. The hardware-based high voltage protection circuit according to claim 1, wherein a resistor R3 and a diode D4 are respectively connected in series between the drain and the gate of the MOS transistor T1.
3. The hardware-based high voltage protection circuit of claim 1, wherein the port VCC is electrically connected to a lamp device to power the lamp device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321618872.5U CN220156696U (en) | 2023-06-25 | 2023-06-25 | High-voltage protection circuit based on hardware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321618872.5U CN220156696U (en) | 2023-06-25 | 2023-06-25 | High-voltage protection circuit based on hardware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220156696U true CN220156696U (en) | 2023-12-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321618872.5U Active CN220156696U (en) | 2023-06-25 | 2023-06-25 | High-voltage protection circuit based on hardware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220156696U (en) |
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2023
- 2023-06-25 CN CN202321618872.5U patent/CN220156696U/en active Active
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