An output controllable low dropout overcurrent protection circuit

Abstract

The invention relates to a low drop-out overcurrent protection circuit with controllable output. The overcurrent protection circuit comprises a main path, an auxiliary path, a reverse voltage protection circuit, a main and auxiliary path overcurrent switching and enabling inhibit control circuit, an efficiency adjustment resistor, an overcurrent sampling resistor and a limited current setting circuit; the overcurrent protection circuit has the functions of automatic overcurrent protection and output enabling / forbidding, is connected to a power entrance of a circuit in series, and can realize the functions of single event latchup resistance of satellite-bone equipment components and short circuit overcurrent protection of the circuit, thus having high practical value. The special application specific integrated circuit (ASIC) chip customized according to the low drop-out overcurrent protection circuit with controllable output well meets the application demands of satellite-bone equipment of a spacecraft and is beneficial to improvement of the equipment integration level; furthermore, the circuit overcurrent protection also has very strong universality for circuits besides the spacecraft.

Description

technical field [0001] The invention relates to an output controllable low-voltage differential overcurrent protection circuit, which is used for the circuit overcurrent protection of electronic equipment and belongs to the field of electronic circuit design. Background technique [0002] In the design of spacecraft electronic equipment, overcurrent protection is an important reliability and safety measure, mainly used for power supply protection, semiconductor device single event lock protection design, etc. At present, there are two kinds of over-current protection designs commonly used: one is to use current-limiting resistors for over-current protection, and the other is to use voltage-stabilizing current-limiting devices for over-current protection, and the use of current-limiting resistors for over-current protection is the most common. [0003] (1) Using a current-limiting resistor for over-current protection, the circuit is simple, but it cannot guarantee that the ci...

AI Technical Summary

Problems solved by technology

[0008] The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide an output controllable low dropout overcurrent protection circuit, which has the functions of automatic overcurrent protection and output controllability, and connect the circuit in series to the electronic equipment of the spacecraft At the power supply inlet, it solves the problem of single event lock-up protection design of semiconductor devices and over-current protection of power supply in the design of spacecraft electronic equipment

Images