Anti-shock surge circuit applied to ruggedized computer

Abstract

The invention discloses an anti-shock surge circuit applied to a ruggedized computer, belongs to anti-surge circuits, and solves the problem of power supply failure after surge voltage shock in a power supply system of the ruggedized computer. The technical scheme is that a piezoresistor, a transient voltage suppressor diode and an overvoltage overcurrent protection circuit are connected in parallel, one end of each of the piezoresistor and the transient voltage suppressor diode is connected with the input end of a power supply, and the other end of each of the piezoresistor and the transient voltage suppressor diode is grounded; the overvoltage overcurrent protection circuit comprises an overvoltage protection voltage stabilization chip and a linear field effect transistor, a VCC pin of the overvoltage protection voltage stabilization chip is connected with the input end of the power supply, and an OUT pin of the overvoltage protection voltage stabilization chip is connected with the output end of the power supply; and the drain of the linear field effect transistor is connected with an SNS pin of the overvoltage protection voltage stabilization chip, the gate of the linear field effect transistor is connected with a GATE pin of the overvoltage protection voltage stabilization chip, and the source of the linear field effect transistor is connected with the OUT pin of the overvoltage protection voltage stabilization chip.

Description

technical field

[0001] The invention relates to an anti-surge circuit, in particular to an anti-shock and surge circuit applied to a reinforced computer. Background technique

[0002] Ruggedized computer (ruggedized computer) is to adapt to various harsh environments. During computer design, various factors that affect computer performance, such as system structure, electrical characteristics and mechanical physical structure, etc., take corresponding guarantee measures. Harsh environment computer. Its characteristics are: strong environmental adaptability, high reliability and high maintainability; strong real-time processing capability; serialization, standardization and modularization.

[0003] Airborne or vehicle-mounted hardened computers have relatively high requirements on the safety of power supply. The low-voltage DC power supply of the airborne or vehicle-mounted ruggedized computer power supply system is generally 24V, but it is often accompanied by an impact sur...

Images