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Overvoltage protection circuit used for notebook computer power supply

An overvoltage protection circuit, a technology for notebook computers, applied in the protection against overvoltage, the protection against overcurrent, and the data processing power supply, etc. problem, to achieve the effect of low circuit loss, simple circuit structure and good reliability

Inactive Publication Date: 2015-05-20
CHENGDU BOYNN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing power supply voltage protection circuit is relatively complex, requires more components, and has poor reliability

Method used

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  • Overvoltage protection circuit used for notebook computer power supply

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] Such as figure 1 As shown, the overvoltage protection circuit for notebook computer power supply according to the present invention includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a A capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a Zener diode DZ, an LT4356 chip, an N-channel enhanced insulated gate field effect transistor M, and the first end of the first resistor R1 is simultaneously connected to the stabilizer The negative pole of the voltage diode DZ, the first terminal of the second resistor R2, and the sixth pin Vcc of the LT4356 chip are connected as the positive input terminal of the overvoltage protection circuit, the second terminal of the first resistor R1 is connected to the first terminal of the first capacitor C1 The anode of the...

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Abstract

The invention discloses an overvoltage protection circuit used for a notebook computer power supply. The overvoltage protection circuit used for the notebook computer power supply comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a voltage-stabilizing diode, an LT4356 chip and an N-channel enhancement type insulated gate field-effect tube, wherein the fifth resistor and the sixth resistor form a voltage detection circuit, the second resistor serves as a current sampling resistor, and the LT4356 chip and the N-channel enhancement type insulated gate field-effect tube form an overvoltage protection control circuit. The overvoltage protection circuit used for the notebook computer power supply is simple in structure, good in reliability and low in circuit loss, and can achieve the functions of overvoltage protection and overcurrent protection at the same time.

Description

technical field [0001] The invention relates to an overvoltage protection circuit for a notebook computer power supply, in particular to an overvoltage protection circuit for a notebook computer power supply with simple circuit and high reliability. Background technique [0002] Notebook computers are powered by low-voltage DC power supplies, which can be accompanied by surge voltages. Laptops are high-end precision equipment that have strict requirements on power surge voltage, and it is necessary to ensure that no failure occurs after being subjected to surge voltage. The existing power supply voltage protection circuit is relatively complicated, requires many components, and has poor reliability. Contents of the invention [0003] The object of the present invention is to provide a simple and reliable overvoltage protection circuit for notebook computer power supply in order to solve the above problems. [0004] The present invention achieves the above object through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F1/26H02H3/20H02H3/08
CPCG06F1/26H02H3/08H02H3/20
Inventor 高爽
Owner CHENGDU BOYNN TECH