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BUY VIPER12AS https://www.utsource.net/itm/p/373931.html
LOW POWER OFF LINE SMPS PRIMARY SWITCHER
Package: SOP8 Manufacturer: ST Description: The VIPER12AS is a high voltage, low power off-line SMPS current mode PWM controller. Features: - Low start-up current - Internal start-up current limit - Internal leading edge blanking - Internal oscillator - Internal soft start - Internal temperature protection - Overvoltage protection - Undervoltage lockout - Overcurrent protection Applications: The VIPER12AS is suitable for use in off-line SMPS applications such as adapters, battery chargers, lighting, and other consumer applications. (For reference only)