VIPER122LSTR ST AC-DC Controllers

The VIPER122LSTR is a low-power offline switched-mode power supply primary switcher from STMicroelectronics, integrating an 800V avalanche rugged power MOSFET with PWM controller for low-power AC-DC conversion. For selection, verify input from 85V to 265V AC, 800V MOSFET rating, output power capability, fixed switching frequency, standby power consumption, and operating temperature suitable for offline applications. Features include current-mode control, auto-restart protection, hysteretic thermal shutdown, frequency jittering for EMI reduction, adjustable current limit, and burst mode operation for low standby power. Ideal for low-cost AC-DC adapters (battery chargers, wall adapters), auxiliary power supplies for appliances, LED drivers, smart meter power supplies, and any low-power offline flyback converter requiring integrated high-voltage MOSFET. In stock at HL Electronics – request a quote for fast delivery.