Ultra wide range dual output back converter demonstration board based on the VIPER16

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.

Key Features

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




Technical Documentation

Product Specifications
Description Version Size
DB0820 DB0820: Ultra wide range dual output back converter demonstration board based on the VIPER16 1.1 182 KB
Application Notes
Description Version Size
AN2872 AN2872: Super wide-range buck converter based on the VIPer16 1.2 581 KB

Hardware Resources

Board Manufacturing Specifications
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 7 KB
Schematic Pack
Description Version Size
Board schematics for STEVAL-ISA010V1 board 1.0 26 KB

Publications and Collaterals

Description Version Size
Smart grid distribution and smart meters - Energy-efficient solutions 2.0 1 MB


License Agreement
Description Version Size
Evaluation products license agreement 1.4 128 KB
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Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STEVAL-ISA010V1 ActiveCARD-Ecopack2

(**) The Material Declaration forms available on st.com 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.