A surge protection circuit and its manufacturing method

Abstract

The invention relates to electronic circuits and semiconductor technologies, in particular to a programmable surge protection circuit and a manufacturing method thereof. A surge protection circuit according to the present invention consists of 2 MOSFETs of the first conductivity type, 2 MOSFETs of the second conductivity type, 2 gate thyristors of the first conductivity type and 2 gate thyristors of the second conductivity type The conduction type gate thyristor is composed mainly by using the drain-source current of MOSFET to control the on-off of the thyristor, so as to discharge the surge current, and a method of manufacturing the surge circuit is proposed. The beneficial effect of the present invention is that it has the advantages of fast response speed (ns level) and strong ability to withstand voltage and current impacts, and can realize dual-wire bidirectional surge protection at the same time, and can also adjust the sensitivity of the protection device to surge voltage as required . The invention is particularly applicable to surge protection circuits.

Description

technical field [0001] The invention relates to electronic circuits and semiconductor technologies, in particular to a surge protection circuit and a manufacturing method thereof. Background technique [0002] Electronic equipment often encounters unexpected voltage transients and surge currents during use, which makes the whole system face the risk of electrical overstress failure and malfunction, and the reliability of the system is also greatly reduced. Therefore, protection against voltage transients and surges has become an important part of improving the reliability of the overall system. Traditional surge protection devices mainly include varistors, gas discharge tubes, TVS diodes, etc., but varistors have weak voltage shock resistance and short service life. Although gas discharge tubes can withstand large current shocks, their response speed is slower. Slow, although TVS has the advantages of small size and fast response, it cannot withstand the impact of high curr...

AI Technical Summary

Problems solved by technology

Traditional surge protection devices mainly include varistors, gas discharge tubes, TVS diodes, etc., but varistors have weak voltage shock resistance and short service life. Although gas discharge tubes can withstand large current shocks, their response speed is slow. Slow, although TVS has the advantages of small size and fast response, it cannot withstand the impact of high current and has a large capacitance

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