AN437 RC缓冲电路设计为可控硅

AN437 RC缓冲电路设计为可控硅

AN437
Application note

RC snubber circuit design for TRIACs

Introduction
When a TRIAC controls inductive loads, the mains voltage and the load current are not in
phase. To limit the slope of the reapplied voltage and ensure right TRIAC turn-off, designer
usually used a snubber circuit connected in parallel with the TRIAC. This circuit can also be
used to improve TRIAC immunity to fast transient voltages.
The subject of this paper is, first of all, to analyze the