ST Life.augmented


12 V - 4 W, 115 kHz isolated flyback based on the VIPer06
  • active Active

The STEVAL-ISA134V1 demonstration board is a a 12 V - 4 W power supply in isolated flyback topology using the VIPer06, a new off-line high voltage converter by STMicroelectronics.

The VIPer06 features an 800 V avalanche rugged power section, PWM operation at 115 kHz with frequency jittering for lower EMI, cycle-by-cycle current limit with adjustable set point, on-board soft-start and safe auto-restart after a fault condition.

Protection features available include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection (the latter available only if auxiliary winding is used).

This flyback converter design is suitable for various applications, such as external adapter or as an auxiliary power supply in consumer equipment.

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Data Brief

Key Features

  • AC main input voltage VIN: 85 VAC- 265 VAC
  • Main frequency fL: 50 Hz; 60 Hz
  • Output voltage VOUT: 12 V
  • Max output current IOUT: 333 mA
  • Precision of output regulation ΔVOUT_LF: ± 5%
  • High frequency output voltage ripple: ΔVOUT_HF50 mV
  • Min active mode efficiency ηAV = 71%
  • Max ambient operating temperature: TAMB = 60 °C


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1941: 12 V - 4 W, 115 kHz isolated flyback based on the VIPer06
1.0 224 KB

Application Notes

Description Version Size
AN4372: STEVAL-ISA134V1: 12 V / 4 W, 115 kHz isolated flyback
1.0 1,409 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ISA134V1 gerber files
1.0 345 KB

Bill of Materials

Description Version Size
2.0 52 KB

Schematic Pack

Description Version Size
STEVAL-ISA134V1 schematics
1.0 139 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA134V1ActiveVIPER06HNBuy Direct51.45Distributor reported inventory date: 2016-02-11
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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