onsemi Integrated Circuits (ICs) - PMIC - AC DC Converters, Offline Switchers NCP1247BD065R2G

The NCP1247BD065R2G is a fixed-frequency current-mode controller designed for flyback converters, featuring a dynamic self-supply function that simplifies auxiliary supply design. It operates at switching frequencies of 65 kHz and includes a timer-based overload protection mechanism, which can be configured for latched or auto-recovery operation. The device supports a wide input voltage range from 8.9V to 28V and has a maximum duty cycle of 80%. Key features include frequency foldback for improved efficiency under light load conditions, low no-load standby power consumption of less than 30 mW, and built-in brown-out detection. The controller also incorporates internal thermal shutdown and provides a peak current drive capability of 500/800 mA. It is suitable for applications such as AC-DC adapters, offline battery chargers, and consumer electronic power supplies. The NCP1247 is packaged in an 8-SOIC format, making it suitable for surface mount technology (SMT) applications.