STEVAL-ISA117V1:Wide range isolated flyback demonstration board, single output 12 V/4.2 W based on the VIPer16LN

This board implements a 4 W single-output wide range mains power supply set in flyback isolated topology, using the VIPER16LN, an off-line high voltage converter by STMicroelectronics.

The features include an 800 V avalanche rugged power section, PWM operation at 60 kHz with frequency jittering for lower EMI, current limiting with adjustable set point, on-board soft-start, a safe auto-restart after a fault condition and a low stand-by power.

The device does not require a biasing circuit to operate because the IC can be supplied by an internal current generator, therefore saving the cost of the transformers auxiliary winding. If the device is biased through an auxiliary winding, the demonstration board can reach very low standby consumption (< 30 mW at 230 VAC, with output load disconnected).

The IC implements several protections that considerably increase end-product safety and reliability: thermal shutdown with hysteresis, delayed overload protection, open loop failure protection (the last one available only if the device is biased through the auxiliary winding).

Key Features

  • Universal input mains range:
    • input voltage 90 - 264 VAC
    • frequency 45 - 65 Hz
  • Single output voltage: 12 V at 0.35 A continuous operation
  • Stand-by mains consumption: < 30 mW at 230 VAC
  • Average efficiency: > 75 %
  • Fully protected against faults (overload, feedback disconnection and overheating)
  • EMI: according to EN55022-Class-B
Product Specifications
DescriptionVersionSize
DB1852: Wide range isolated flyback demonstration board, single output 12 V/4.2 W based on the VIPER16LN1.0546 KB
Application Notes
DescriptionVersionSize
AN4259: STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN3.01 MB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-ISA117V1 gerber files1.0504 KB
Bill of Materials
DescriptionVersionSize
STEVAL-ISA117V1 BOM3.045 KB
Schematic Packs
DescriptionVersionSize
STEVAL-ISA117V1 schematics1.018 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-ISA117V1VIPer16LN51.451NECEAR99ITALY
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-ISA117V1CARDIndustrialEcopack2
Wide range isolated flyback demonstration board, single output 12 V/4.2 W based on the VIPER16LN STEVAL-ISA117V1
STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN STEVAL-ISA117V1
STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN STEVAL-ISA117V1
STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN STEVAL-ISA117V1
STEVAL-ISA117V1 12 V / 4.2 W, 60 kHz flyback isolated with VIPer16LN STEVAL-ISA117V1
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2