ST Life.augmented


Wide input-range, single-output 5 V / 11 W power supply demonstration board based on the VIPer27
  • active Active

The STEVAL-ISA122V1 demonstration board meets the specifications of a wide range of auxiliary power supplies for applications including LCD or plasma TVs and desktop computers, where the power supply that converts the energy from the mains often includes two modules.

One module is the main power supply which provides most of the power, and is off when the application is shut down or in standby mode.

The other is the auxiliary power supply, which only provides energy to specific parts of the equipment such as the USB ports, remote receivers, or modems, but stays on when the application is in standby mode.

It is optimized for very low standby consumption, which allows it to satisfy the most stringent energy-saving requirements.

The VIPer27 has a switching frequency of 115 kHz, which helps to reduce the transformer size.

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Data Brief

Key Features

  • Wide input voltage range (VIN): 90 to 265 Vrms
  • Nameplate output voltage (Vout): 5 V
  • Max output current IOUT: 2.2 A
  • Precision of output regulation: ±5%
  • High frequency output voltage ripple (ΔVout_HF): 50 mV
  • Max ambient operating temperature (TA): 60 °C
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB1871: Wide input-range, single-output 5 V / 11 W power supply demonstration board based on the VIPer27
1.0 243 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
STEVAL-ISA122V1 gerber files
1.0 116 KB

Bill of Materials

Description Version Size
1.0 71 KB

Schematic Pack

Description Version Size
STEVAL-ISA122V1 schematics
1.0 156 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA122V1ActiveVIPER27HNBuy Direct126.17Distributor reported inventory date: 2016-02-06
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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