The STMicroelectronics VIPER12ADIP is a monolithic offline switching regulator from the VIPER™ series, integrating a 730 V avalanche-rugged power MOSFET and a PWM controller in a single 8-DIP through-hole package.
730 V breakdown and 60 kHz switching — design constraints
The 730 V breakdown voltage provides headroom for universal AC input flyback designs. The 60 kHz fixed switching frequency keeps transformer core size manageable. The internal power MOSFET is rated for a 14.5 V startup threshold and operates with a Vcc supply range of 9 V to 38 V, which covers the typical bias rail from an auxiliary winding.
Integrated protection — fewer external components
The VIPER12ADIP integrates current limiting, over-temperature shutdown, and over-voltage protection. This reduces the external component count to a bridge rectifier, input bulk capacitor, transformer, output diode, and a few passives.