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STMicroelectronics VIPERGAN65 High Voltage Converter is an advanced quasi-resonant offline high voltage converter with E-mode GaN HEMT. The VIPERGAN65 is designed for medium power quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters, providing an output power of up to 65W in a wide range. The VIPERGAN65 integrates a complete set of features that offer an extremely flexible and easy-to-use chip, helping to design a highly efficient offline power supply.
The STM VIPERGAN65 High Voltage Converter has a ZVS quasi-resonant operation with the dynamic blanking time option and the valley synchronization function, which always turns on the power switch at the valley of the drain resonance. This operation reduces the switching losses and maximizes the overall efficiency at any input line and load condition. The device’s advanced power management with low quiescent achieves low stand-by consumption. The feed-forward compensation reduces the maximum output peak power variation over the entire input voltage range.
Additionally, to the above functions, the VIPERGAN65 demonstrates protection features that vastly increase the end-product’s safety and reliability: the output overvoltage protection, the overtemperature protection (OTP), the overload protection (OLP), the brown-in/out protection, that set the input voltage level to power on and power off the converter and the input overvoltage protection (iOVP), that protects the system in case of an abnormal increase of the input line. All the protections are in auto-restart mode.
