65W GaN converter in low cost SOIC16 package
STMicroelectronics has launched a 240MHz GaN-based flyback converter in a SOIC16 package for cost-conscious applications
The VIPerGaN65D quasi-resonant offline converter integrates a 700V gallium nitride (GaN) transistor and optimised gate driver with typical protection features to make the wide-bandgap technology more easily accessible.
The GaN transistor operates at up to 240kHz, with minimal switching losses, to allow a small flyback transformer, small passive components, and a compact, low-cost circuit board.
The VIPerGaN65D is also packaged into a more traditional SO16n (narrow) outline rather than the 5mm x 6mm DFN used by other members of the VIPerGaN family.
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. Dynamic blanking time helps maintain efficiency with increasing input voltage so that the converter adapts to maximize overall efficiency at any line and load condition. Feedforward compensation minimizes the input peak power variation over the input voltage range.
The VIPerGaN65D current limit of 3.5A provides up to 65W when designed for the universal input voltage range from 85V to 265V. Designing for 185V-265V input allows a maximum power rating of 85W. The standby power is below 30mW, meeting requirements of the latest international energy efficiency standards.
The VIPerGaN65D enables tiny, low-cost fast chargers and adapters, and can also power washing machines, dishwashers, coffee makers, televisions, set-top boxes, digital cameras, portable audio players, cordless shavers, and more. It is also used in auxiliary supplies for desktop PCs and servers, building and home automation equipment, energy meters, domestic and architectural lighting, and air conditioners.
An integrated current-sensing power MOSFET provides accurate current sensing needed to optimize efficiency and activate system protection. Built-in features include overcurrent protection, output overvoltage protection, input-voltage feed-forward compensation, brown-in/brown-out protection, input-overvoltage protection, output overload protection, output short-circuit protection, and thermal shutdown. All the protection features have auto-restart and the converter also implements frequency jitter for EMI suppression.
The EVLVIPGAN65DF reference design helps accelerate power-supply projects based on the VIPerGaN65D. Combining the converter with secondary synchronous rectification, controlled by ST’s SRK1001 adaptive controller, the reference design is a fully protected 24V, 65W power supply with peak efficiency greater than 93%.
The VIPerGaN65D is available now in the SOIC16 narrow-body package, from $1.16 each for orders of 1000 pieces.
If you enjoyed this article, you will like the following ones: don't miss them by subscribing to :
