STEVAL-VP318L1F STMicroelectronics

STEVAL-VP318L1F Data brief 15 V / 1.2 A SSR Flyback converter based on VIPer318L Features Universal input mains range: 85 265VAC Frequency: 50-60Hz Output voltage: 15 V Output current: 1.2 A Stand-by mains consumption: < 55mW at 230VAC Average efficiency: > 85% Tight line and load regulation over the entire input and output range Meets IEC55022 Class B conducted EMI even with reduced EMI filter, thanks to the frequency jittering feature RoHS compliant WEEE compliant Description The STEVAL-VP318L1F reference design implements a 15 V - 18 W SSR isolated flyback converter developed for general purpose applications operating from 85 to 265 V . AC The design is built around the new VIPer318L offline high-voltage converter from the VIPerPlus family with 800 V avalanche-rugged Power MOSFET, PWM current-mode control, fixed 60 kHz switching frequency with jittering to satisfy electromagnetic disturbance regulations, and burst mode for light load management. Product summary The board features a small size, minimal BOM, high efficiency, low stand-by 15 V / 1.2 A SSR STEVAL- consumption and tight line and load regulation over the entire input and output range. Flyback converter VP318L1F Input overvoltage and undervoltage protections with separate and settable trigger based on VIPer318L thresholds are available on the respective OVP and UVP pins. Energy Saving Off- line High Voltage VIPER318L Converter Isolated Auxiliary Applications Power Supply up to 20W DB4224 - Rev 2 - November 2020 www.st.com For further information contact your local STMicroelectronics sales office.STEVAL-VP318L1F Schematic diagram DB4224 - Rev 2 page 2/4 1 Schematic diagrams Figure 1. STEVAL-VP318L1F board schematic L1 5 C9 R9 BR VOUT C3 D2 L2 7 D3 R1 + + 4 C15 C11 C12 1 D1 GND2 8 C2 2 R2 C13 N.C. N.C. N.C. N.C. DR. DR. DR. DR. C4 T1 IC1 + CONTROL R16 R12 COMP FB OVP UVP N.A. Vcc N.C. GND C1 R3 F NTC IC3 R11 R8 C7 R18 R17 R10 C10 C8 IC2 AC IN R4 Rz + C5 R13 Dz - +