STMicro’s 12V/10W offline switcher eval board, in distribution

July 06, 2015 // By Graham Prophet
Mouser Electronics has tSTMicroelectronics’ STEVAL-ISA162V1 evaluation board that implements an isolated flyback (12V/0.84A) 10W wide-range mains supply developed for general-purpose applications and using the VIPer25HD, an off-line, high-voltage converter from the ST’s VIPerPlus family.

The converter chip integrates an 800V rugged power MOSFET, current-mode PWM logic, and a zero current detection (ZCD) block for quasi-resonant operation. The device also integrates a high-voltage startup generator, allowing the IC to connect directly with input mains without requiring a resistor to reduce the voltage.

The VIPer25HD IC operates in quasi-resonant mode with valley switching, enabling low electromagnetic interference (EMI) emission and safe behaviour in case of short circuit. The IC features high-level protection including dual-level overcurrent protection, overvoltage and overload protections, hysteretic thermal protection, soft-start, and safe auto-restart after any fault-condition removal.

The STEVAL-ISA162V1 Evaluation Board can help reduce BOM costs and time-to-market when creating solutions such as power adapters for mobile devices, industrial power, and switched-mode power supplies (SMPS) for household appliances.