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12 V /1 A SMPS wide range demonstration board based on the VIPER26
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The STEVAL-ISA081V1 demonstration board is a switched mode power supply (SMPS) demonstration board and it is an isolated SMPS capable of delivering a 12 W output over a wide input voltage range.

It is designed for a mains application focusing on cost and size effective solutions.

The STEVAL-ISA081V1 SMPS generates 12 V nominal output voltage using primary regulation and it is based on the VIPER26 monolithic converter, integrating a high voltage MOSFET and PWM controller in one package.

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Data Brief

Key Features

  • Vin: 85 ~ 305 Vrms / f: 45 ~ 66 Hz
  • Vout1: 12 VDC ± 10 %, 1 A (at 3.3 V not loaded)
  • Vout2: 3.3 VDC ± 4 %, 100 mA
  • Maximum total output current: 1 A
  • Standby < 120 mW at 230 VAC
  • Short-circuit: protected
  • PCB type and size: FR4, single-side 35 μm, 32 x 90 mm
  • Isolation: isolated 4 kV / 8 mm
  • EMI: according to EN55022 Class
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1158: 12 V /1 A SMPS wide range demonstration board based on the VIPER26
1.1 125 KB

User Manual

Description Version Size
UM0984: STEVAL-ISA081V1 demonstration board based on a 12 V / 1 A isolated flyback
2.0 1,434 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
Gerber files for STEVAL-ISA081V1 board
1.0 74 KB

Bill of Materials

Description Version Size
BOM for STEVAL-ISA081V1 board
1.0 22 KB

Schematic Pack

Description Version Size
Board schematic for STEVAL-ISA081V1 board
1.0 38 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA081V1ActiveVIPer26LDBuy Direct58.8Distributor reported inventory date: 2016-02-06
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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