NCP1217A, NCP1217 Datasheet - ON Semiconductor

NCP1217A Enhanced PWM Current-Mode Controller

Pin No. Pin Name Function 1 Adj Adjust the skipping peak current 2 FB Sets the peak current setpoint 3 CS Current sense input 4 GND The IC ground 5 Drv Driving pulses 6 VCC Supplies the IC 7 NC * 8 HV Ensures a clean and lossless startup sequence Description This pin lets you ad.

NCP1217, NCP1217A Enhanced PWM Current-Mode Controller for High-Power Universal Off-Line Supplies Housed in an SO 8 or PDIP 7 package, the NCP1217 represents the enhanced version of the NCP1203 based controllers. Due to its high drive capability, NCP1217 drives large gate charge MOSFETs, which together with internal ramp compensation and built in overvoltage protection, ease the design of modern AC/DC adapters. NCP1217 offers a true alternative to UC384X<.

NCP1217A Features

* a high

* voltage startup FET, which ensures a clean and loss less startup sequence. Its current

* mode control topology provides an excellent input audio

* susceptibility and inherent pulse

* by

* pulse control. Internal ramp compensation easily prevents subharmonic osc

NCP1217_ONSemiconductor.pdf