STMicroelectronics (ST), a global semiconductor company, is expanding its VIPerGaN product family to support high-efficiency USB-PD and fast charger designs.

STMicroelectronics (ST) announced on the 23rd that it has expanded its VIPerGaN series of GaN-based power solutions with the addition of a new 65W flyback converter, the 'VIPerGaN65W'.

This new product features a 700V GaN transistor and a quasi-resonant PWM control IC integrated into a single QFN 5x6 package (PQFN), making it ideal for high-efficiency power designs such as USB-PD chargers, ultra-fast battery chargers, and auxiliary power supplies.

VIPerGaN65W operates in quasi-resonant mode up to maximum load to achieve ZVS (Zero-Voltage Switching), and maximizes efficiency with valley skipping technology in medium and high load ranges.

Additionally, ST's proprietary Valley Locking technology suppresses switching noise in the audio frequency band, ensuring low-noise operation.

Under light load, it reduces power loss through frequency foldback, and under no-load conditions, it switches to burst mode to lower power consumption to less than 30mW.

This meets the latest eco-friendly design standards and is suitable for charger and adapter designs where standby power reduction is important.

VIPerGaN65W includes an integrated gate driver optimized for GaN transistor characteristics, ensuring stable switching performance without external auxiliary components.

This reduces design complexity, shortens time to market, improves power density, and reduces BOM costs.

It also has a built-in high-voltage startup circuit and a senseFET for precise current measurement, enhancing the accuracy and stability of power control.

Following the VIPerGaN50W, the newly released VIPerGaN65W also provides various power management functions.

Line-Voltage Feedforward prevents excessive increases in output power due to changes in input voltage.

Dynamic Blanking Time minimizes switching losses, and multiple protection features include input and output overvoltage protection, overtemperature shutdown, and brown-in/brown-out.

These features provide higher stability and efficiency compared to conventional flyback circuits, supporting the development of high-quality power solutions.

ST also provides the EVLVIPGAN65WF evaluation board to help jump-start VIPerGaN65W-based designs. This board implements a 24V/65W isolated flyback converter and operates over a 90V to 265V AC input range, supporting all global power environments.

The VIPerGaN65W is in volume production in a 5mm x 6mm PQFN (Power QFN) package and is available through ST's eSTore and major distributors.

Pricing starts at $1.19 for 1,000 units, making it highly competitively priced among GaN-based power solutions.