Multipath output short-circuit protection circuit

Abstract

The invention discloses a multipath output short-circuit protection circuit which comprises a power supply module, an input winding, a plurality of output windings, a plurality of short circuit detection circuits and a short-circuit protection circuit. The power supply module is used for supplying power to the input winding, and the output windings are used for coupling power supply signals transmitted by the input winding and outputting isolation power supply signals to corresponding loads. A plurality of short circuit detection circuits are used for adjusting output short circuit control signals according to the isolation power supply signals output by the corresponding output windings. A short-circuit protection circuit is used for adjusting power supply control signals output to the power supply module according to the short-circuit control signals output by all the short-circuit detection circuits so as to control a power supply state of the power supply module to the input winding. Through the technical scheme of the invention, cost of outputting multiple paths of isolation power supplies is effectively reduced, short-circuit protection of each path of isolation power supplyoutput branch is realized, and a probability that devices in multiple paths of isolation power supply signal output lines are burnt is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of integrated circuits, in particular to a multi-output short-circuit protection circuit. Background technique [0002] With the continuous development of electronic technology, the degree of integration of equipment in various industries is getting higher and higher. Sometimes a single board or equipment needs different isolated power supplies to supply power, making the application of integrating multiple isolated power supplies in a single board or equipment more and more common. . [0003] At present, the way to output multi-channel isolated power signals is to use multiple ready-made isolated power modules, but isolated power modules are expensive, which undoubtedly increases the technical cost of outputting multi-channel isolated power signals. In addition, different isolated power signal output branches The connected load is inevitably short-circuited, and the short-circuit proc...

AI Technical Summary

Problems solved by technology

[0003] At present, the way to output multi-channel isolated power signals is to use multiple ready-made isolated power modules, but isolated power modules are expensive, which undoubtedly increases the technical cost of outputting multi-channel isolated power signals. In addition, different isolated power signal output branches The connected load is inevitably short-circuited, and the short-circuit process is prone to generate a large sudden current, and the large short-circuit power consumption will cause the devices in the multi-channel isolated power signal output line to burn out, affecting the normal operation of the equipment

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