STEVAL-ISA140V1 STMicroelectronics

STEVAL-ISA140V1 15W, 12V output, isolated flyback converter using VIPer Plus - VIPER37HE Data brief Description The STEVAL-ISA140V1 is a 15 W wide range evaluation board based on the Viper37HE. It is designed as an example of an isolated auxiliary power supply. The board and the transformer were designed and optimized in order to have a very compact size evaluation board. Features AC Main Input voltage range: 100 V to AC 265 V AC Mains frequency (f ): 50 Hz / 60 Hz L Output voltage typ: 12 V Output current: 1.25 A Output ripple voltage: 50 mV Rated output power: 15 W : 50 mW Input power in standby 230 V AC Active mode efficiency: 78% Ambient operating temperature: 60 C RoHS compliant November 2014 DocID025733 Rev 2 1/4 For further information contact your local STMicroelectronics sales office. www.st.comSchematic diagram STEVAL-ISA140V1 1 Schematic diagram Figure 1. STEVAL-ISA140V1 circuit schematic L1 D6 L2 12V-1.25A T1 3.3uH 1mH STPS5H100UF BR C2 C3 RMB6S 15uF 15uF C4 R1 1nF 220k C9 C10 C11 D1 470uF 100uF 1uF STTH1L06A D4 D3 GND R7 1k BAT41ZFILM BAT41ZFILM CM R2 2X20mH 4.7 R3 R12 133K 2.2M C1 D2 OPTO BAT41ZFILM SFH610A-2 R8 12k 220nF - X2 IC1 NTC VIPER37HE 16 C5 RV VDD DRAIN 220pF R10 130k BR 320V R5 C6 R9 CONTROL 220 33uF 82k F1 CONT 2A FB GND C12 10nF D5 18V C8 IC2 AC IN AC IN 33nF R4 TS432 30k R11 C7 2.2nF OPTO 15k R6 SFH610A-2 C13 47k 2.2nF 2/4 DocID025733 Rev 2 1 2 4 3 - +