ST Life.augmented


Non-isolated offline power supply demonstration board based on the VIPER22A-E
  • active Active

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 pinfor- 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.

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Data Brief

Key Features

  • Input voltage range 85 Vac to 264 Vac
  • Input voltage frequency 50/60 Hz
  • Lowest possible component count
  • Integrated thermal overload protection
  • No-load consumption around 200 mW
  • 70% to 80% efficiency at full load
  • Integrated short-circuit protection


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB0693: Non-isolated offline power supply demonstration board based on the VIPER22A-E
2.1 88 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
PCB layout
1.0 132 KB

Bill of Materials

Description Version Size
Bill of materials
1.0 50 KB

Schematic Pack

Description Version Size
Board schematic
1.0 348 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA035V1ActiveVIPER22ADIP-EBuy Direct56.35Distributor reported inventory date: 2016-02-13
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA10

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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