CS51220 Datasheet, PDF (1/16 Pages) ON Semiconductor – Feed Forward Voltage Mode PWM Controller with Programmable Synchronization

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
• Constant Frequency Feed Forward Voltage Mode Control
• Programmable Pulse by Pulse Overcurrent Limit
• Programmable Foldback Overcurrent Limit with Delay
• Soft Hiccup Overcurrent Protection with Programmable Foldback
• Frequency Synchronization Output with Programmable Phase Delay
• Synchronization Input to Higher or Lower Frequency
• Direct Connection to External Opto Isolators
• Logic Gate Output Signal
• Accurate Volt−Second Clamping
• Programmable Soft Start
• Logic Input to Disable IC
• Line Overvoltage and Undervoltage Monitoring
• 3.3 V 3% Reference Voltage Output
http://onsemi.com
16
1
SO−16
D SUFFIX
CASE 751B
PIN CONNECTIONS AND
MARKING DIAGRAM
1
V_O
GND
V_CC
V_REF
I_SET
I_SENSE
OV
UV
16
SYNCO
V_SD
SS
COMP
FF
DISABLE
SYNCI
C_T
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
ORDERING INFORMATION
Device
Package
Shipping
CS51220ED16
SO−16
48 Units/Rail
CS51220EDR16 SO−16 2500 Tape & Reel
© Semiconductor Components Industries, LLC, 2006
1
July, 2006− Rev. 7
Publication Order Number:
CS51220/D