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Ultra wide range dual output back converter demonstration board based on the VIPER16
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This demonstration board based on VIPER16 is designed as an example of a simple non-isolated auxiliary power supply for a range of input voltages from 85 VAC to 500 VAC.

There is an ever-increasing demand for small power supplies capable of working without voltage range limitations, even at nominal levels of 400 VAC and 415 VAC, respectively. The real voltage level can reach 500 VAC (415 V + 20%).

The major markets for this type of SMPS are home appliances and metering.

The VIPER16 device includes an 800 V rugged power switch, a PWM controller, programmable overcurrent, overvoltage, overload, a hysteretic thermal protection, soft-start and safe auto-restart after any fault condition removal. Burst mode operation at light load combined with the very low consumption of the device helps to meet standby energy-saving regulations.

The significant benefit of this new chip derives from the jitter of the switching frequency and the possibility to supply the chip directly from the DC HV bus, so auxiliary supply is not mandatory.

The VIPER16 is suitable for flyback or buck topologies and thanks to an internal self-supply circuit it does not require an auxiliary supply.

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Data Brief

Key Features

  • Input voltage Vin: 85 - 500 VAC (f: 45 - 66 Hz)
  • Output voltages:V1= 12 V ± 10%V2= 5 V ± 4%
  • Output current: 150 mA total (5 V and 12 V output) output current for full input voltage range
  • Standby: 96 mW at 230 VAC
  • Short-circuit protection
  • PCB type and size:FR4, single side 70 μmdim.: 27 x 45 mm
  • Isolation: non isolated - N connected to output GND
  • EMI: In accordance with EN55022 - class B
  • EMC: surge - IEC 61000-4-5 - 2 kV
  • EMC: burst - IEC 61000-4-4 - 8 kV
  • RoHS compliant


Design Resources


Technical Documentation

Product Specifications

Description Version Size
DB0820: Ultra wide range dual output back converter demonstration board based on the VIPER16
1.1 183 KB

Application Notes

Description Version Size
AN2872: Super wide-range buck converter based on the VIPer16
1.2 581 KB

Hardware Resources

Board Manufacturing Specification

Description Version Size
Gerber files for STEVAL-ISA010V1 board
1.0 34 KB

Bill of Materials

Description Version Size
BOM for STEVAL-ISA010V1 board
1.0 8 KB

Schematic Pack

Description Version Size
Board schematics for STEVAL-ISA010V1 board
1.0 26 KB

Sample & Buy

Part Number Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA010V1ActiveVIPER16LNBuy Direct37.97Distributor 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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