AN439无缓冲器关闭™和逻辑电平可控硅行为

AN439无缓冲器关闭™和逻辑电平可控硅行为

AN439
Application note

Snubberless and logic level TRIAC behavior at turn-off

Introduction
The use of TRIACs is limited by their switching behavior. Indeed, there is a risk of spurious
triggering after conduction if the slope of the decreasing current is too high, and/or if the
slope of the reapplied voltage is too high. The designer must then take some precautions:
device over-rating, switching aid network (snubber), and junction temperature margin, and
so on. This generally involves additional costs.