GaN-based ICs combine AC-DC and DC-DC stages into a single power converter, cutting power system losses by up to 50 percent.

Power Integrations announces the InnoMux™-2 family of single-stage, independently regulated multi-output offline power-supply ICs. InnoMux-2 ICs consolidate AC-DC and downstream DC-DC conversion stages into a single chip, providing up to three independently regulated outputs for use in white goods, industrial systems, displays, and other applications requiring multiple voltages. Eliminating separate DC-DC stages slashes component count, reduces PCB footprint, and increases efficiency by as much as 10 percentage points compared to traditional two-stage architectures. Efficiency is aided by the ICs’ 750 V PowiGaN™ gallium-nitride transistors, zero-voltage switching (without an active clamp), and synchronous rectification.

InnoMux-2 ICs deliver up to 90 watts of output power with accurate regulation of better than ±3 percent across the full input line, load, temperature, and differential current step conditions. Total power system efficiency (AC to regulated low-voltage DC segment) is above 90 percent; the advanced InnoMux-2 controller also manages light-load power delivery, avoiding the need for pre-load resistors and reducing no-load consumption to less than 30 mW. This conserves power for necessary functionality in applications subject to the 300 mW allowance for standby usage under the European energy-using product (EuP) regulations.

InnoMux-2 devices leverage Power Integrations’ thermally efficient InSOP™24 and InSOP™28 packages with PCB cooling, so no heatsink is required. Device options include dual- and three-output constant voltage (CV); optionally, one output may be dedicated to a constant current (CC) drive, suitable for powering LEDs in displays or for high-speed charging of an internal battery.

Typical applications include TVs, monitors, appliances, networking, home and building automation, LED emergency lighting, and industrial power supplies.

Availability & resources
Pricing for InnoMux-2 IMX2174F devices starts at $1.11 for 50,000-unit quantities. Datasheets, three reference design reports, and an introduction video are immediately available for download or viewing:

• InnoMux2-EP family datasheet
• InnoMux2-BL family datasheet
• IML204DG data sheet (four-channel LED backlight controller IC to partner with InnoMux2-BL for computer monitors)
• DER-714: a 52 W TV design with one CV and one CC output
• DER-715: a 23 W monitor design with one CV and four CC outputs
• DER-716: a 62 W industrial and appliance design with three CV outputs
• InnoMux-2 introduction video