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CS51021A Datasheet(PDF) 1 Page - ON Semiconductor

Part No. CS51021A
Description  Enhanced Current Mode PWM Controller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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CS51021A Datasheet(HTML) 1 Page - ON Semiconductor

 
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© Semiconductor Components Industries, LLC, 2006
February, 2006 − Rev. 8
1
Publication Order Number:
CS51021A/D
CS51021A, CS51022A,
CS51023A, CS51024A
Enhanced Current Mode
PWM Controller
The CS51021A/2A/3A/4A Fixed Frequency PWM Current Mode
Controller family provides all necessary features required for AC−DC
or DC−DC primary side control. Several features are included
eliminating the additional components needed to implement them
externally. In addition to low startup current (75
mA) and high
frequency operation capability, the CS51021A/2A/3A/4A family
includes overvoltage and undervoltage monitoring, externally
programmable dual threshold overcurrent protection, current sense
leading edge blanking, current slope compensation, accurate duty cycle
control and an externally available 5.0 V reference. The CS51021A
and CS51023A feature bidirectional synchronization capability, while
the CS51022A and CS51024A offer a sleep mode with 100
mA
maximum IC current consumption. The CS51021A/2A/3A/4A family
is available in a 16 lead narrow body SOIC package.
Device
Sleep/Synch
VCC Start/Stop
CS51021A
Synch
8.25 V/7.7 V
CS51022A
Sleep
8.25 V/7.7 V
CS51023A
Synch
13 V/7.7 V
CS51024A
Sleep
13 V/7.7 V
Features
75 mA Max. Startup Current
Fixed Frequency Current Mode Control
1.0 MHz Switching Frequency
Undervoltage Protection Monitor
Overvoltage Protection Monitor with Programmable Hysteresis
Programmable Dual Threshold Overcurrent Protection with
Delayed Restart
Programmable Soft Start
Accurate Maximum Duty Cycle Limit
Programmable Slope Compensation
Leading Edge Current Sense Blanking
1.0 A Sink/Source Gate Drive
Bidirectional Synchronization (CS51021A/3A)
50 ns PWM Propagation Delay
100 mA Max Sleep Current (CS51022A/4A)
Pb−Free Packages are Available*
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
x
= Specific Device Code
A
= Assembly Location
WL, L
= Wafer Lot
Y
= Year
WW, W = Work Week
G or
G = Pb−Free Package
SOIC−16
D SUFFIX
CASE 751B
1
16
VFB
ISET
1
16
COMP
RTCT
SS
OV
LGND
UV
VREF
SLOPE
VCC
SLEEP or SYNC
PGND
ISENSE
VC
GATE
PIN CONNECTIONS AND
MARKING DIAGRAMS
http://onsemi.com
1
16
TSSOP−16
DTB SUFFIX
CASE 948F
116
See detailed ordering and shipping information in the package
dimensions section on page 9 of this data sheet.
ORDERING INFORMATION


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