|
CS51221_09 Datasheet, PDF (1/14 Pages) ON Semiconductor – Enhanced Voltage Mode PWM Controller | |||
|
CS51221
Enhanced Voltage Mode
PWM Controller
The CS51221 fixed frequency feed forward 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: SoftâStart, accurate duty cycle limit control,
less than 50mA startup current, over and undervoltage protection, and
bidirectional synchronization. The CS51221 is available in a 16 lead
SOIC narrow surface mount package.
Features
⢠1.0 MHz Frequency Capability
⢠Fixed Frequency Voltage Mode Operation, with Feed Forward
⢠Thermal Shutdown
⢠Undervoltage LockâOut
⢠Accurate Programmable Max Duty Cycle Limit
⢠1.0 A Sink/Source Gate Drive
⢠Programmable PulseâByâPulse Overcurrent Protection
⢠Leading Edge Current Sense Blanking
⢠75 ns Shutdown Propagation Delay
⢠Programmable SoftâStart
⢠Undervoltage Protection
⢠Overvoltage Protection with Programmable Hysteresis
⢠Bidirectional Synchronization
⢠25 ns GATE Rise and Fall Time (1.0 nF Load)
⢠3.3 V 3% Reference Voltage Output
⢠PbâFree Packages are Available*
*For additional information on our PbâFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
September, 2005 â Rev. 8
http://onsemi.com
16
1
SOICâ16
D SUFFIX
CASE 751B
TSSOPâ16
DTB SUFFIX
16
CASE 948F
1
PIN CONNECTIONS AND
MARKING DIAGRAM
1
GATE
ISENSE
SYNC
FF
UV
OV
16
VC
PGND
VCC
VREF
LGND
SS
RTCT
ISET
COMP
VFB
1
16
CS51221= Specific Device Code
A
= Assembly Location
WL, L = Wafer Lot
YY, Y = Year
WW, W = Work Week
G
= PbâFree Package
ORDERING INFORMATION
Device
Package Shippingâ
CS51221ED16
SOICâ16 48 Units / Rail
CS51221ED16G
CS51221EDR16
SOICâ16 48 Units / Rail
(PbâFree)
SOICâ16 2500 Tape & Reel
CS51221EDR16G
CS51221EDTB16G
SOICâ16 2500 Tape & Reel
(PbâFree)
TSSOPâ16 96 Units / Rail
(PbâFree)
CS51221EDTB16R2G TSSOPâ16 2500 Tape & Reel
(PbâFree)
â For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
Publication Order Number:
CS51221/D
|
▷ |