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STEVAL-ISA071V2

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4 W non-insulated, wide input voltage range SMPS based on the VIPer16

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$36.75
Parameter NameParameter Value
Target ApplicationAC-DC Topologies
Core ProductVIPER16LN
Input Voltage Min Volt85.0
Input Voltage Max Volt265.0
ECCN USEAR99
ECCN EUNEC
Packing TypeNot Applicable
ROHS Compliance GradeEcopack2
GradeIndustrial
Package NameCARD

The STEVAL-ISA071V2 demonstration board is a non-insulated SMPS capable of delivering a 4 W output over a wide input voltage range and is designed for a mains application requiring -5 V and +7 V, referred to neutral.


The basic concepts used in this design can also be applied for higher power outputs or different voltage ranges.


The SMPS generates outputs of 5 V and 12 V, referred to the output marked -5 V. The 5 V output is dedicated to supplying an MCU. This configuration allows the use of the MCU to directly drive a Triac (referred to neutral).


The 12 V output is used to supply additional circuits (relays, OA, etc.).

Key features
  • Input:
    • VIN: 85 - 264 Vrms
    • f: 45 - 66 Hz
  • Output:
    • 12 VDC± 10% (referred to -5 V), 160 mA
    • -5 VDC ± 4%, 400 mA
  • Maximum output power: 4 W (range is up to 6 W for EU)
  • Standby power: 35 mW at 230 VAC
  • Short-circuit protected
  • Insulation: non-insulated; N connected to output GND
  • EMI: in accordance with EN55022 class B
  • RoHS compliant