Gallium nitride (GaN)-based power converter for fast chargers and adapters introduced by STMicroelectronics
GENEVA – STMicroelectronics in Geneva is introducing the VIPerGaN65D flyback converter for tiny low-cost fast chargers and adapters, digital cameras, and set-top boxes.
The VIPerGaN65D offers a SOIC16 outline for extremely small and economical power supplies, adapters, and USB-PD (Power Delivery) fast chargers to 65 Watts with universal input voltage.
The quasi-resonant offline converter integrates a 700-volt gallium nitride (GaN) transistor and optimized gate driver with typical protection features.
The GaN transistor operates at clock speeds as fast as 240 kHz, with minimal switching losses. The VIPerGaN65D is packaged into a traditional SO16n (narrow) outline.
Zero-voltage switching
The converter operates with zero-voltage switching and can adjust the valley-synchronization delay to ensure the GaN transistor always turns on at the valley of the drain resonance.
Featuring dynamic blanking time to help maintain efficiency with increasing input voltage, the converter adapts to make the most of overall efficiency at any line and load condition.
The VIPerGaN65D current limit of 3.5 amps lets the converter deliver as much as 65 Watts when designed for the universal input voltage range from 85 to 265 volts. Designing for 185-to-265-volt input allows a maximum power rating of 85 Watts.
For more information contact STMicroelectronics online at https://www.st.com/content/st_com/en/campaigns/maximize-power-density-and-efficiency-with-our-gan-high-voltage-converters-asp-mchvcon.html.
