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.
With advanced power management and low quiescent current, the converters consume standby power of less than 30mW operating in adaptive burst mode. Each operates in quasi-resonant mode, with dynamic blanking time and valley synchronization to reduce switching losses and maximize efficiency at all input line and load conditions. This assists in reducing energy usage, helping to meet ecodesign codes targeting global energy savings and net-zero carbon emissions.
Integrated features to ensure safety and reliability include input voltage feedforward compensation to minimize peak power variation, output overvoltage protection, current sensing, input overvoltage protection, and brown-in and brown-out protection. Thermal shutdown is also included, as well as frequency jittering to suppress EMI.
The VIPerGaN100 and VIPerGaN65 are in production now, each in the 5mm x 6mm QFN package, priced from $2.93 for VIPerGaN100 and $2.62 for VIPerGaN65, for orders of 1000 pieces.
At ST (st.com), we are more than 50,000 creators and makers of semiconductor technologies mastering the semiconductor supply chain with state-of-the-art manufacturing facilities. An integrated device manufacturer, we work with more than 200,000 customers and thousands of partners to design and build products, solutions, and ecosystems that address their challenges and opportunities, and the need to support a more sustainable world. Our technologies enable smarter mobility, more efficient power and energy management, and the wide-scale deployment of the Internet of Things and connectivity. ST is committed to becoming carbon neutral by 2027.