Product Overview

Product Overview
CS51221: Enhanced Voltage Mode PWM Controller for Forward or Flyback
For complete documentation, see the data sheet
Product Description
The CS51221 Enhanced Voltage Mode PWM Controller contains all of the features necessary for basic voltage mode operation.
This PWM controller has been optimized for high frequency primary side control operation. In addition, this device includes such
features as: Soft Start, accurate duty cycle limit control, less than 50uA startup current, over and under voltage protection and
bidirectional synchronization. The CS51221 is available in a SOIC-16 and TSSOP-16 surface mount packages.
Features
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1MHz Frequency Capability
Fixed Frequency Voltage Mode Operation, with Feed Forward
Thermal Shutdown
Under Voltage Lock-out
Accurate Programmable Max Duty Cycle Limit
1A Sink/Source Gate Drive
Programmable Pulse-by-Pulse Overcurrent Protection
Leading Edge Current Sense Blanking
75ns Shutdown Propagation Delay
Programmable Soft Start
For more features, see the data sheet
Applications
• Hot Swap - DC-DC Conversion
Part Electrical Specifications
Product
Compliance
Status
Topolog
y
Control
Mode
fsw Typ
(kHz)
StandUVLO
by Mode (V)
Short
Circuit
Protecti
on
Latch
Soft
Start
VCC Max Drive
(V)
Cap.
(mA)
Packag
e Type
CS51221EDR16G
AEC
Qualified
Active
Forward
Voltage
Mode
Up to
1000
No
No
Yes
Yes
15
SOIC16
Yes
PPAP
Capable
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016
1000