Description

The STEVAL-ISA110V1 demonstration board is a

12 V-1 A power supply set in non-isolated flyback

topology using the VIPER26LN, a new offline

high-voltage converter by STMicroelectronics.

The features of the device 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, onboard

soft-start, a safe auto-restart after a fault

condition, and low standby power.

Protection features include thermal shutdown with

hysteresis, delayed overload protection, and open

loop failure protection.

Features

■ Universal input mains range:

– input voltage 90 - 264 VAC

– frequency 45 - 65 Hz

■ Single output voltage: 12 V @ 1 A continuous

operation

■ Standby mains consumption: < 30 mW @ 265

VAC

■ Average efficiency: > 85

■ Fully protected against faults (overload,

feedback disconnection and overheating)

■ EMI: according to EN55022-Class-B