STEVAL-ISA182V1 STMicroelectronics

S T E VA L - I S A 1 8 2 V 1 8.4 W / 30 W peak power offline flyback converter using VIPER38HD Data brief Description The STEVAL-ISA182V1 evaluation board implements an isolated flyback converter (12 V / 0.7 A) 8.4 W (30 W peak), US range 85 132 V , developed for metering. AC The core of the application is the VIPER38HD, the latest offline converter from the VIPerPlus family. The device is a high-voltage converter that intelligently integrates an 800 V rugged power MOSFET with PWM current-mode control. The device features an adjustable extra power Features timer (EPT) that enables the IC to sustain overload conditions for a few seconds. US input range: 85 132 VAC, frequency: 50 60 Hz The main characteristics of the evaluation board Output voltage / current: 12 V / 0.7 A (2.5 A are its small size, minimal BoM, high efficiency peak) and low standby consumption. Extremely low Very compact size consumption under the no-load condition is Standby mains consumption: lower than 25 ensured thanks to burst mode operation that mW at 115 V reduces the average switching frequency and AC Min. active mode efficiency: 81.14% minimizes all frequency related losses. Min. active mode at 10% load efficiency: VIPER38HD operates at 115 kHz fixed 71.14% frequency. Frequency jittering is implemented to EMI: according to EN55022-Class-B help meet the standards regarding RoHS compliant electromagnetic disturbance. The IC features high-level protections like dual-level OCP, output overvoltage, short-circuits and thermal shutdown with hysteresis. After the removal of a fault condition, the IC is automatically restarted. October 2016 DocID029796 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ISA182V1 1 Schematic diagram Figure 1: STEVAL-ISA182V1 circuit schematic GSPG190716 1120SG 2/4 DocID029796 Rev 1 L1 STPS5H100B L2 12V-0.7A T1 1mH D6 3.3uH BR C4 C2 C3 R1 C11 22uF 22uF C9 C10 220pF 220k D1 820uF 220uF STTH1L06A 1uF GND R7 BAT41ZFILM 1k D3 R12 D4 R2 2 3 4.7 CM 2.2M 20mH BAT41ZFILM D2 OPTO R8 1 4 R3 SFH610A 150k BAT41ZFILM 130k IC1 C1 VIPER38H VDD DRAIN R10 220nF 130k EPT R9 R5 240k CONTROL 220 RV CONT C6 C5 FB GND 33uF 220pF C14 C12 320V 10nF D5 47nF OPTO C8 18V 33nF REF FS R4 2 A 30k TS432 R11 C7 10nF 15k R6 SFH610A C13 47k 2.2nF AC IN AC IN - +