onsemi PMIC - PMIC - AC DC Converters, Offline Switchers - NCP1012ST65T3G NCP1012ST65T3G

The NCP1012ST65T3G is a monolithic offline switcher designed for low standby power applications. It integrates a fixed-frequency current-mode controller with a built-in 700 V MOSFET, making it suitable for creating cost-effective power supplies. The device operates at selectable frequencies of 65 kHz, 100 kHz, or 130 kHz and features skip-cycle operation, which enhances efficiency at light loads by reducing acoustic noise. This part includes essential protections such as short-circuit detection and latched overvoltage protection when an auxiliary winding is used. It also incorporates a soft-start feature and frequency jittering to improve electromagnetic interference (EMI) performance. The NCP1012ST65T3G is available in a compact SOT-223 package and is capable of consuming less than 100 mW in standby mode when configured with an auxiliary winding. Typical applications include low power AC/DC adapters and auxiliary power supplies for various devices.