October 2007

Rev 4

1/8

AN1246

Application note

VIPower: auxiliary BIAS

power supply using VIPer20A-E

Introduction

This application note describes a bias power supply to meet the needs of powering up

Power MOSFETs as well as providing standby power when the main unit is off.

The VIPer20ADIP-E, a part of STMicroelectronics proprietary VIPower (Vertical Intelligent

Power), is a current mode PWM with a 700 V avalanche rugged Power MOSFET. It uses a

fabrication process which allows the integration of analog control circuits with a vertical

power device on the same chip. It can provide an output of 10 W power capability for wide

range input, or 20 W for single input voltage range.

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