onsemi PMIC - PMIC - AC DC Converters, Offline Switchers - NCP1053P44 NCP1053P44

The NCP1053P44 is a monolithic high voltage gated oscillator power switching regulator designed for AC-DC converter applications. It operates directly from a rectified AC line source, supporting output power levels of up to 40 W with fixed AC inputs of 100 V, 115 V, or 230 V, and 20 W with variable AC inputs ranging from 85 V to 265 V. This device features an integrated startup regulator that eliminates the need for an auxiliary bias winding, along with a fault detector and programmable timer for overload protection. Key specifications include a maximum output current of 400 mA and an on-chip power switch rated for 700 V. The NCP1053P44 also incorporates input undervoltage lockout with hysteresis, thermal shutdown, and auto-restart fault detection. It operates at an oscillator frequency of 44 kHz, with options for reduced EMI through frequency dithering. The product is available in both 8-pin dual-in-line and 4-pin SOT-223 packages, and is compliant with European Blue Angel standards for low power consumption. Typical applications include wall adapters, portable electronic chargers, and low power standby supplies.