STMicroelectronics VIPER28 Off-Line High Voltage Converters feature an 800V rugged power section, a PWM control, two levels of over-current protection, over-voltage and overload protections, and hysteric thermal protection. STMicroelectronics VIPER28 Off-Line High Voltage Converters feature advance frequency jittering for reduced EMI filter cost. An extra power timer allows the management of output peak power for a designed time window. The high voltage start-up circuit is embedded in the device. STMicroelectronics VIPER28 Off-Line Converters are designed for use in a variety of applications, auxiliary power supply for consumer and home equipment, ATX auxiliary power supply, and low/medium power AC-DC adapters.