© Semiconductor Components Industries, LLC, 2006

July, 2006− Rev. 7

1

Publication Order Number:

CS51220/D

CS51220

Feed Forward Voltage

Mode PWM Controller

with Programmable

Synchronization

CS51220 is a single output PWM Controller with switching

frequency up to 500 kHz. The feed forward voltage mode control

provides excellent line regulation for wide input range. This PWM

controller has a synchronization output allowing programmable phase

delay. For overcurrent protection, the “soft hiccup” technique

effectively limits the output current with maximum flexibility. In

addition, this device includes such features as: soft start,

pulse−by−pulse current limit, programmable foldback current limit,

volt−second clamping, maximum duty cycle, overvoltage and

undervoltage protection, and synchronization input. The CS51220 is

available in 16 SO narrow surface mount package.

Features

http://onsemi.com

Device

Package

Shipping

ORDERING INFORMATION

SO−16

48 Units/Rail

SO−16

2500 Tape & Reel

SO−16

D SUFFIX

CASE 751B

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

UV

1

16

SYNCI

OV

DISABLE

FF

COMP

SS

GND

SYNCO

PIN CONNECTIONS AND

MARKING DIAGRAM

1

16

CS51220ED16

CS51220EDR16