STEVAL-ISA191V1 STMicroelectronics

S T E VA L - I S A 1 9 1 V 1 5 V - 12 V, 15 W double output isolated flyback converter based on VIPer37LE Data brief Description The STEVAL-ISA191V1 evaluation board implements an isolated flyback double output (5 V / 1.2 A and 12 V / 0.75 A) 15 W wide range mains developed for general purpose applications. The core of the application is the VIPer37LE, a new Off-line high Voltage 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 evaluation board features a small size, minimal BOM, high efficiency and low standby Features consumption. Extremely low consumption under no-load conditions is ensured thanks to burst Universal input mains range: 85 265 VAC mode operation that reduces the average frequency: 50 60 Hz switching frequency and minimizes all frequency Output voltage1: 5 V / 1.2 A related losses. Output voltage2: 12 V / 0.75 A Very compact size VIPer37LE operates at 60 kHz fixed frequency. Frequency jittering is implemented to help meet Stand-by mains consumption: < 40 mW at 230 V electromagnetic disturbance standards, and the AC device implements several protections, including Average efficiency: > 75% overvoltage, overload, output short circuit, EMI: according to EN55022-Class-B secondary winding short, hard transformer RoHS compliant saturation protection and brown out protection, for improved design safety and reliability. December 2015 DocID028699 Rev 1 1/4 www.st.com For further information contact your local STMicroelectronics sales office Schematic diagram STEVAL-ISA191V1 1 Schematic diagram Figure 1: STEVAL-ISA191V1 circuit schematic 2 1 1 2 1 2 4 3 10 1 9 8 7 6 2 4 2 1 + - 1 2 2 1 GSPG3011151415SG 2/4 DocID028699 Rev 1 5 T1 D5 12V L1 12 V 0.75 A BR C16 6 RMB6S R18 2.2uH C2 270k STPS2H100A C8 4 3 330pF STTH1L06 R1 4 330uF 47F 400V 1.8M 3 8 5V D6 L2 5 V 1.2 A D1 1 7 2.2uH STPS5H100B R11 C13 4 2 C11 C9 C10 C12 D3 9 1200F 220uF 2.2nF 220uF 12k 2.2nF 2 BAT46ZFILM D2 CM Choke 3 1 TRANSFORMER D4 BAT46ZFILM R2 C15 Y1 2.2nF 12V 1.8M BAT46ZFILM C1 100nF R5 R4 180k R12 10 1.2k RV 320V VIPer37LE F1 IC1 OPTO1 12V R13 1.6 A FUSE VDD 470k DRAIN 5 R7 BR 5V SFH6106-2T 330 CONTROL J3 12Vz 3 C14 CONT Dz4 C3 10nF FB GND JUMPER 22nF J1 CON2 C5 R16 R14 R15 C4 180k 68k 330k 22nF C7 47F 50V IC2 22nF 3 C6 R3 18Vz R6 22k Dz2 1.5nF TS432 39k R8 R17 4.7k 22k R9 100 Dz3 1 2 12V 12Vz R10 100