Power Integrations, a leading provider of high-voltage integrated circuits for energy-efficient power conversion, has recently announced the launch of its new InnoMux-2 family of single-stage, independently regulated multi-output offline power-supply ICs. The new switcher ICs combine AC-DC and DC-DC stages into a single power converter, reducing component count, PCB footprint, and power system losses by up to 50 percent.
The InnoMux-2 ICs are designed for applications that require multiple voltages, such as white goods, industrial systems, displays, and others. The ICs can provide up to three independently regulated voltage outputs or two voltage outputs and a constant current output from a single stage, achieving a compact and efficient power sub-system with low component count. The ICs also feature 750 V PowiGaN gallium-nitride transistors, which enable zero-voltage switching (without an active clamp) and synchronous rectification, enhancing the efficiency and reliability of the power converter.
The 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. The total power system efficiency (AC to regulated low-voltage DC segment) is above 90 percent, surpassing the performance of traditional two-stage architectures. 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.
The InnoMux-2 devices leverage Power Integrations’ thermally efficient InSOP-24 and InSOP-28 packages with PCB cooling, so no heatsink is required. The devices also offer comprehensive protection features, such as input and output overvoltage, overcurrent, and overtemperature protection, as well as soft-start and auto-restart functions.
Roland Saint-Pierre, vice president of product development at Power Integrations, said: “Most modern electronic systems rely on multiple internal voltages to operate various functions such as computing, communication and actuation function – typically heat, light, sound or motion of some kind. But losses in each conversion stage are compounded, degrading system performance and generating heat. The InnoMux-2 IC overcomes this challenge by providing up to three independently regulated voltage outputs or two voltage output and a constant current output from a single stage, achieving a compact and efficient power sub-system with low component count.”
