NCP1288BD65R2G ON Semiconductor

NCP1288 Controller, Fixed Frequency, Current Mode, for Flyback Converters The NCP1288 is a new generation of the NCP12xx fixedfrequency NCP1288 1 Latch HV 8 2 FB 3 6 CS VCC 4 GND DRV 5 Figure 1. Pinout TYPICAL APPLICATION EXAMPLE VOUT VIN (dc) LATCH HV FB NCP1288 CS VCC GND DRV Figure 2. Typical Application PIN FUNCTION DESCRIPTION Pin N Pin Name Function Pin Description 1 LATCH Latch off Input Pull the pin up or down to latchoff the controller. An internal current source allows the direct connection of an NTC for over temperature detection 2 FB Feedback A pulldown optocoupler controls the output regulation. 3 CS Current Sense Senses the primary current for currentmode operation, and provides a mean for overpower compensation adjustment. 4 GND IC ground 5 DRV Drive Output Drives an external MOSFET 6 V V Input This supply pin accepts up to 28 Vdc CC CC 8 HV High Voltage Pin Connects to the bulk capacitor or the rectified AC line to perform the functions of startup current source and brown out / line overvoltage detections