NCP1217 - Enhanced PWM Current-Mode Controller

onsemi

Key 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 oscillations from taking place in continuous conduction mode designs. When the current setpoint falls below a given value, e. g. the.

NCP1217 enhanced pwm current-mode controller by onsemi - Datasheet Preview

Datasheet Details

Part number	NCP1217
Manufacturer	onsemi
File Size	302.59 KB
Description	Enhanced PWM Current-Mode Controller
Datasheet	NCP1217 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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−based designs. With an internal structure operating at different fixed frequencies (65–100–133 kHz), the controller 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.