2026 Applied Power Electronics Conference (APEC): Power Integrations has applied its PowiGaN gallium nitride technology to the TOPSwitch flyback integrated circuit, increasing the power range to 400 watts. 

Power Integrations' TOPSwitch GaN products make their debut at the 2026 APEC exhibition. 

The company's PowiGaN technology doubles the output power of flyback converters, expanding the power range from the traditional 250 watts to 440 watts. It can be used in faster charging scenarios for electric bicycles, mobile devices, and industrial fields. With the help of synchronous rectification technology, the power consumption of the product in standby and off modes is less than 50 milliwatts, meeting the requirements of the EU ErP energy efficiency regulations. 

Power Integrations stated that integrating gallium nitride technology can reduce circuit complexity, shorten the design cycle, and usually does not require the addition of an extra heat sink, while also lowering the overall system cost. 

Silvestro Fimiani, the director of product marketing at Power Integrations, said: 

"With the Topswitch GaN solution, we have pushed the flyback topology into a power range that was previously unattainable, enabling engineers to achieve high efficiency and performance with a more streamlined architecture." 

This series of integrated circuits can achieve a conversion efficiency of 92% within a load range of 10% to 100%. Moreover, the on-state resistance (RDS(ON)) is lower than that of traditional silicon-based chips, effectively reducing the on-state loss and "significantly enhancing the power capacity of the flyback converter". 

The chip is equipped with 800-volt PowiGaN power transistors, featuring high surge tolerance and low switching losses, with ample design margin. It also supports a maximum switching frequency of 150 kilohertz, which can significantly reduce the size of the transformer. 

Under a 230-volt AC input with line detection functionality, the no-load power consumption is less than 50 milliwatts. When the device is in standby mode, a 230-volt AC input of 300 milliwatts can output a maximum of 210 milliwatts of power, which is used to maintain the operation of auxiliary management functions. 

The product is available in two packaging forms: the thin eSOP-12 surface mount packaging and the eSIP-7 through-hole packaging. 

eSOP-12 Package: It can achieve a 135-watt output within an 85–265 volt AC input without the need for a heat sink, and is suitable for household appliances that are sensitive to space. 

eSIP-7 package: It adopts a vertical layout, minimizing the occupied area of the printed circuit board, and its thermal resistance performance is equivalent to that of TO-220 package devices. Power Integration Company claims that its board size can be smaller than the LLC resonant topology solution; a metal heat sink can be easily installed by a simple snap-fit, further expanding the power range, suitable for applications such as power tools, electric bicycles, garage door openers, etc. 

The TOPSwitch GaN integrated circuit is pin-compatible with the company's TinySwitch-5 off-line switch chip. Designers can adopt the same solution to cover application scenarios ranging from 10 watts to 440 watts. 

The company simultaneously released three reference designs corresponding to power ratings of 50 watts, 168 watts, and 350 watts: 

DER-1079: Utilizing TOP7074K, it provides a 60-watt wide-voltage isolated flyback power supply for household appliances; 

DER-1019: Based on TOP7078E, designed as a 356-watt high-voltage (89 volts / 4 amps) isolated flyback industrial power supply; 

RDK-1018: Utilizing TOP7075E, it offers a 168-watt wide-voltage isolated flyback solution for electric bicycle chargers.