AES Semigas


22 April 2020

Power Integrations adds new PowiGaN devices to InnoSwitch3-MX isolated switcher IC family, increasing output of display PSUs to 75W

Power Integrations of San Jose, CA, USA, which provides high-voltage integrated circuits for energy-efficient power conversion, says that its InnoSwitch3-MX isolated switcher IC family has been expanded with the addition of three new PowiGaN devices. As part of a chipset with its InnoMux controller IC, the new switcher ICs now support display and appliance power supply unit (PSU) applications with a continuous output power of up to 75W without a heatsink.

The InnoMux chipset employs a unique single-stage power architecture that reduces losses in display applications by 50% compared with conventional designs, increasing overall efficiency to 91% in constant-voltage and constant-current LED backlight driver designs. Additionally, by eliminating the need for post-regulation (i.e. buck and boost) stages, TV and monitor designers can halve component count, improving reliability and reducing manufacturing cost. With a high breakdown voltage of 750V, the PowiGaN InnoSwitch3-MX parts are also extremely robust and highly resistant to the line surges and swells commonly seen in regions with unstable mains voltages.

InnoSwitch3-MX flyback switcher ICs combine the primary switch, the primary-side controller, a secondary-side synchronous rectification controller, and the firm’s FluxLink high-speed communications link. The InnoSwitch3-MX receives control instructions from its chipset partner InnoMux IC, which independently measures the load requirements of each output and directs the switcher IC to deliver the right amount of power to each output, maintaining accurate regulation of current or voltage.

“By using our PowiGaN technology we are able to address higher-output applications in TVs, monitors and appliances that employ LED displays,” says product marketing manager Edward Ong. “The chipset increases efficiency beyond the requirements of all mandatory regulations and improves manufacturers’ scores in EU efficiency labeling programs.”

Samples of the INN3478C, INN3479C and INN3470C InnoSwitch3-MX ICs are available now with prices starting at $2.52, $3.14 and $3.71 respectively in 10,000-piece quantities. Technical support for the chipset is available from the Power Integrations website at

See related items:

Power Integrations expands range of InnoSwitch3 ICs incorporating robust 750V GaN transistors

Power Integrations delivers millionth GaN-based InnoSwitch3 IC

Power Integrations launches GaN-based InnoSwitch3 AC-DC converter ICs

Tags: GaN Power electronics



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