ST Life.augmented


Wide range single output demonstration board based on the VIPER26HN
  • active Active

The STEVAL-ISA111V1 demonstration board is a 12 V, 1 A power supply set in non-isolated flyback topology using the VIPER26HN, the new offline high voltage converter by STMicroelectronics.

The features include an 800 V avalanche rugged power section, PWM operation at 115 kHz with frequency jittering for lower EMI, current limiting with adjustable set point, onboard soft-start, a safe auto-restart after a fault condition and a low standby power. The protections include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection.

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Data Brief

Key Features

  • Universal input mains range:
  • input voltage 90 - 264 VAC
  • frequency 45 - 65 Hz
  • Single-output voltage: 12 V at 1 A continuous operation
  • Standby mains consumption: < 30 mW at 230 VAC
  • Average efficiency: > 80%
  • Fully protected against faults (overload, feedback disconnection and overheating)
  • EMI: according to EN55022-Class-B
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1822: Wide-range single-output demonstration board based on the VIPER26HN
1.0 804 KB

Application Notes

Description Version Size
AN4165: STEVAL-ISA111V1: 12 V/12 W, 115 kHz non-isolated flyback based on the VIPER26
1.0 3,084 KB

Hardware Resources

Bill of Materials

Description Version Size
1.0 46 KB

Schematic Pack

Description Version Size
STEVAL-ISA111V1 schematics
1.0 103 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA111V1ActiveVIPER26HNBuy Direct99.22Distributor reported inventory date: 2016-02-09
Distributor NameRegionStockMin. order

(*) 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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