April 2009

Doc ID 14748 Rev 1

1/13

AN2777

Application note

New high-temperature, high-performance TRIACs for

optimized vacuum cleaner designs

Introduction

A new high-temperature TRIAC family, able to work up to a 150 °C junction temperature in

steady-state, has been introduced. This family helps to reduce the bulk of the required

heatsink. These TRIACs are particularly suitable for hot or limited environments found in

home appliances, such as vacuum cleaners.

One key parameter in the design of TRIACs operating at high temperature is the turn-off

capability. We explain here briefly how to optimize this parameter and present the

performances of a new 12 A, 600 V device.

Test results are also presented to compare these performances to other high-temperature

TRIACs available on the market today. These tests are performed in extremely severe

temperature conditions as can appear in vacuum cleaners.

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