GaN boosts output of high-efficiency display power supplies
To reduce the bill of materials and the size and weight of TVs, monitors and appliances, the InnoSwitch 3-MX isolated switcher IC family now includes three new PowiGaN devices.
Power Integrations has introduced the PowiGaN INN3478C, INN3479C, INN3470C InnoSwitch3-MX ICs which support display and appliance power supply applications with a continuous output power of up to 75 W without a heatsink.
The InnoMux chipset employs a single-stage power architecture that reduces losses in display applications by 50 per cent when compared to conventional designs, increasing overall efficiency to 91 per cent in constant-voltage and constant-current LED backlight driver designs. By eliminating the need for post regulation (i.e. buck and boost) stages, the component count for TV and monitor designers can be halved, this in turn can improve reliability and reduce manufacturing cost, added Power Integrations. With a high breakdown voltage of 750 V, 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 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.
Samples of the INN3478C, INN3479C, INN3470C InnoSwitch3-MX ICs are available now.
Power Integrations specialises in semiconductor technologies for high voltage power conversion. The company’s products are key building blocks in the clean-power ecosystem, enabling the generation of renewable energy as well as the efficient transmission and consumption of power in applications ranging from mW to MW.
