Power Integrations announced an expansion of its InnoSwitch 3 family of offline CV/CC flyback switcher ICs. The new INN3x78C devices incorporate a smaller size 8 750 V PowiGaN transistor, enabling compact and efficient power supplies delivering between 27 and 55W without heatsinks. The ICs are housed in the same high-creepage, safety-compliant InSOP-24D package as larger members of the GaN-based InnoSwitch3 families, which target up to 120W.
Known for exceptional efficiency – up to 94 per cent efficient across line and load – PowiGaN technology is also extremely robust, making them highly resistant against line surges and swells commonly seen in regions with unstable mains voltage. This enables OEMs to specify a single power supply design to be used worldwide. Applications for the new parts include USB PD and high-current chargers/adapters for mobile devices, as well as set-top boxes, displays, networking, gaming products and appliances – especially those aiming to comply with the planned European Energy Labeling Regulation.
Chris Lee, director of product marketing at Power Integrations, comments: “We have experienced increased demand for our efficient AC-DC converter ICs with the highly robust 750 V 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 per cent efficiency and low field return rate from tropical markets is very straightforward.”
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