STR-W6251D, STR-W6252D, and STR-W6253D PWM Off-Lin.
STR-W6251D - PWM Off-Line Switching Regulator ICs
STRW6251D - PWM Switching Regulator
STR-W6251D - 30 W-Universal Input/45 W-230 Vac Input PWM Switching Regulators