onsemi AC DC Converters, Offline Switches NCP1077STAT3G

The NCP1077STAT3G is a high-voltage switcher designed for low power offline switch-mode power supplies (SMPS). It integrates a fixed frequency current mode controller with a built-in 700 V MOSFET, offering a maximum peak current of 800 mA. The device operates at selectable frequencies of 65 kHz, 100 kHz, or 130 kHz, and features soft-start, frequency jittering, and skip-cycle operation to enhance efficiency at light loads. Protection mechanisms include auto-recovery output short circuit protection, overvoltage protection, and internal temperature shutdown. The NCP1077STAT3G is capable of reducing no-load input consumption to below 50 mW, making it suitable for applications requiring low standby power. It is available in both SOT-223 and PDIP-7 packages, providing flexibility for different design requirements. Typical applications include auxiliary and standby isolated power supplies for devices such as smart meters and white goods.