STMicroelectronics STEVAL-VP318L2F Converter Reference Design

STMicroelectronics STEVAL-VP318L2F Converter Reference Design implements a 15V, 18W isolated flyback converter in primary-side regulation (PSR) developed for general purpose applications, operating from 90 to 265V_AC. The reference design is built around the VIPER318LDTR offline high-voltage converter, which belongs to the STMicroelectronics VIPerPlus family. It features an 800V avalanche-rugged power MOSFET, PWM current mode control, fixed 60kHz switching frequency with jittering to meet electromagnetic disturbance standards, and burst mode for light load management. The evaluation board’s main characteristics are small size, minimal BOM, high efficiency and tight line, load regulation over the entire input and output ranges. Input overvoltage and under-voltage protection, with separate and settable intervention thresholds, are available at OVP and UVP pins.