VIPERGAN50 High Voltage Converter STMicroelectronics VIPERGAN50 High Voltage Converter is an advanced quasi-resonant offline high voltage converter with E-mode GaN HEMT. The VIPERGAN50 is designed for medium power quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters, capable of providing an output power up to 50W in a wide range. The High Voltage Converter integrates a complete set of features that deliver an extremely flexible and easy-to-use chip and help to design a highly efficient offline power supply.