STEVAL-ISA153V1 STMicroelectronics

STEVAL-ISA153V1 12 V, 15 W (20 W peak) isolated flyback converter based on the VIPER38LE Data brief Description The STEVAL-ISA153V1 product evaluation board implements a 12 V/1.25 A, 15 W (20 W peak) isolated flyback wide-range mains developed for general-purpose applications. The core of the application is the VIPER38LE, the latest offline converter from the VIPerPlus family. The device is a high-voltage converter that smartly integrates an 800 V rugged power MOSFET with PWM current-mode control. The device features an adjustable extra power timer (EPT) that enables the IC to sustain overload conditions for a few seconds. The main characteristics of the evaluation board Features are its small size and minimal BOM, high Universal input mains range: 90 265 V efficiency and low standby consumption. AC frequency: 50 - 60 Hz Extremely low consumption under no-load conditions is ensured thanks to burst mode Output voltage/current: 12 V/1.25 A (1.65 A operation which reduces the average switching peak) frequency and minimizes all frequency-related Very compact size losses. Standby mains consumption: lower than 30 The VIPER38LE operates at a fixed 60 kHz mW at 230 V AC frequency. Frequency jittering is implemented, Minimum active mode efficiency: 81.55% which helps the application meet electromagnetic disturbance standards. Minimum active mode at 10% load efficiency: 71.55% The IC includes high-level protection features EMI: in accordance with EN55022-Class-B such as dual-level OCP, output overvoltage, short-circuit, and thermal shutdown with RoHS compliant hysteresis. After removal of a fault condition, the IC is automatically restarted. May 2014 DocID026381 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.comSchematic diagram STEVAL-ISA153V1 1 Schematic diagram Figure 1. STEVAL-ISA153V1 circuit schematic 2/4 DocID026381 Rev 1