Switching power supplies feature high efficiency, compact size and excellent voltage regulation. Widely used in industrial automation equipment, new energy devices, smart home appliances, power adapters and other electronic products, they act as the core unit for stable power supply in electronic systems. Operating conditions such as voltage surges and dynamic load changes impose strict requirements on power control ICs regarding conversion efficiency, standby power consumption, reliability and protection mechanisms.

Mojay Semiconductor focuses on the R&D of AC-DC PWM power control ICs. Offline flyback power IC series including M5579, M6362 and M5839 are specially designed for low-power switching power supplies and power adapters. Adopting current-mode PWM architecture, the ICs run at fixed frequency under full load. At light load, they enter valley-turn-on green mode; under ultra-light load, extended burst mode is enabled. High conversion efficiency is maintained across the full load range to effectively reduce standby power consumption.

The ICs are built with a complete set of protection functions: cycle-by-cycle over-current protection (OCP), overload protection (OLP), under-voltage lockout (UVLO), over-temperature protection (OTP) and over-voltage protection (OVP). Some models support primary-side sensing schemes without TL431 and optocouplers, greatly cutting peripheral components, simplifying power hardware design and reducing overall BOM cost. Suitable for industrial power supplies, power modules of smart equipment and small home appliance adapters, they deliver highly integrated, reliable and cost-effective core chip solutions for switching power supplies.