STMicroelectronics’ 100W and 65W VIPerGaN converters
Summary
The compact and highly integrated design targets switched-mode power supplies (SMPS) for USB-PD chargers, home appliances, smart-building controllers, lighting, air conditioning, smart metering, and other industrial applications. Each device integrates a pulse-width modulation (PWM) controller and a 650V enhancement-mode GaN power transistor and allows secondary-side regulation using a standard optocoupler. Housed in a 5mm x 6mm QFN package, the small footprint and advanced integration ensure superior power density and save bill-of-materials (BoM) costs. The wide-bandgap transistor technology enhances energy efficiency and simplifies thermal management. Each operates in quasi-resonant mode, with dynamic blanking time and valley synchronisation to reduce switching losses and maximize efficiency at all input line and load conditions.
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