Data brief

For further information contact your local STMicroelectronics sales office.

January 2010

Doc ID 15041 Rev 2

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STEVAL-ISA035V1

Non-isolated offline power supply demonstration board

based on the VIPER22A-E

Features

Description

Many appliances today use non-isolated power

supplies to furnish the low output power required

to run a microcontroller, LED displays, and relays

or AC switches. This type of power supply has a

single rectifier to reference the neutral to output

ground in order to fire Triacs or AC switches.

This demonstration board can use the

VIPER12A-E or the VIPER22A-E, which are pin-

for-pin compatible and can supply power for a

wide variety of applications.

The VIPER12A-E is used for 12 V at 200 mA and

16 V at 200 mA, while the VIPER22A-E is used

for 12 V at 350 mA and 16 V at 350 mA.

The same board can be used for any output

voltage from 10 V to 35 V.

For more design details, please refer to

application note AN1357.

STEVAL-ISA035V1

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