ACTIVE CLAMP VOLTAGE STRESS SUPPRESSION CIRCUIT, METHOD AND DRIVING CIRCUIT FOR POWER SWITCH

WIPO Patent Application WO/2019/184377

A1

Disclosed in the present invention are an active clamp voltage stress suppression circuit, method and driving circuit for a power switch, wherein an active clamp circuit is connected between an input terminal and control terminal of a power switch, and a suppression circuit comprises: a detection module that is used for detecting whether the power switch triggers an active clamp; an execution module that is disposed in a driving path of the power switch, and that is used for cutting off the driving path when the detection module detects that the active clamp is triggered. The present invention detects whether the power switch triggers the active clamp, and cuts off a current driving path of the power switch when the detection module detects that the active clamp is triggered, thereby eliminating the bypass effect of the driving path on current of an active clamp injection power switch, and improving the utilization rate of reverse breakdown current of the active clamp circuit. Thus, the clamping effect of the active clamp is improved, heat loss of a transient voltage suppressor (TVS) in the active clamp circuit is reduced, heat loss of the driving circuit is reduced, and the reliability of the active clamp circuit is improved.

XU TAOTAO (CN)
MEI JIASHENG (CN)
ZHU TIEYING (CN)

PCT/CN2018/115038

October 03, 2019

November 12, 2018

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SUZHOU INOSA UNITED POWER SYSTEM CO LTD (CN)

H03K17/082

CN108471304A	2018-08-31
CN108387830A	2018-08-10
CN204906177U	2015-12-23
CN106603050A	2017-04-26
CN104052048A	2014-09-17
US20150145583A1	2015-05-28

SHENZHEN STANDARD PATENT & TRADEMARK AGENT LTD. (CN)

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