Power Integrations expands Innoswitch range with lower power devices

The Inn3x78C devices incorporate a smaller “size 8” 750V PowiGaN transistor, enabling power supplies that deliver between 27W and 55W without heatsinks.

The ICs are housed in the same InSOP-24D package as larger members of the GaN-based Innoswitch 3 families, which target up to 120W.

The devices operate up to 94% efficiently across line and load, and are highly resistant against line surges and swells commonly seen in regions with unstable mains voltage, the firm claims.

Suggested applications for the parts include USB PD and high-current chargers/adapters for mobile devices, as well as set-top boxes, displays, networking and gaming products and appliances – especially those aiming to comply with the planned European energy labelling regulation.

Chris Lee, director of product marketing at Power Integrations says “We have experienced increased demand for our efficient AC-DC converter ICs with the highly robust 750V GaN transistor. Simultaneous electrical strength and efficiency are difficult to achieve due to the relationship between Silicon MOSFET breakdown voltage and COSS-related switching loss.

“Our electrically strong PowiGaN transistors have very low COSS, so achieving over 94% efficiency and low field return rate from tropical markets is very straightforward.”