September 2013

DocID023949 Rev 2

1/19

AN4209

Application note

Design methodology for repetitive voltage suppressors (RVS)

in repetitive mode: STRVS

Introduction

The silicon transient voltage suppressor (TVS) device such as the Transil™ was initially

specified with a power surge capability to respond to industrial standard test conditions,

especially against high-energy single transient voltages. Today, many components in

switched mode power supplies are continuously subjected to very short transient voltages.

Little data is given in TVS specifications regarding the repetitive mode operation. Therefore,

it is not easy for the designer to accurately assess the clamping voltage and power losses

under these conditions.

This application note introduces the new repetitive voltage suppressor STRVSX features,

specifically adapted to the repetitive mode operation. A design guideline is presented and

selection processes are described.

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