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CAT4101
1 A Constant-Current LED
Driver with PWM Dimming
Description
The CAT4101 is a constant ? current sink driving a string of
high ? brightness LEDs up to 1 A with very low dropout of 0.5 V at full
load. It requires no inductor, provides a low noise operation and
minimizes the number of components. The LED current is set by an
external resistor connected to the RSET pin. The LED pin is
compatible with high voltage up to 25 V, allowing the driving of long
strings of LEDs. The device ensures an accurate and regulated current
in the LEDs independent of supply and LED forward voltage
variation.
http://onsemi.com
D 2 PAK 5
(TO ? 263, 5 LEAD)
TV SUFFIX
CASE 418AH
The PWM/EN input allows the device shutdown and the LED
brightness adjustment by using an external pulse width modulation
(PWM) signal.
The driver features a thermal shutdown protection that becomes
active whenever the die temperature exceeds 150 ° C.
The device is available in a high ? power, 5 ? lead TO ? 263 package
offering excellent thermal dissipation characteristics.
EN/PWM
VIN
GND
RSET
LED
PIN CONNECTIONS
1
TAB
Features
? Accurate 1 A Current Sink
? Up to 25 V Operation on LED Pin
? Low Dropout 500 mV at 1 A
? LED Current Set by External Resistor
? High Resolution PWM Dimming via EN/PWM
? “Zero” Current Shutdown Mode
? Thermal Shutdown Protection
? TO ? 263 (D 2 PAK) 5 ? lead Package
? This Device is Pb ? Free, Halogen Free/BFR Free and is RoHS
Compliant
Applications
? High Power LED up to 1 A
? Architectural and General Lighting
? Automotive Lighting
(Top View)
MARKING DIAGRAM
CAT4101TV
XXXXXXXXX
1
CAT4101TV = Specific Device Code
XXXXXXXXX = Internal Traceability
ORDERING INFORMATION
Device Package Shipping ?
VCC
3 V to 25 V
LEDs
CAT4101TV ? T75
TO ? 263 750 /
(D 2 PAK, 5 Lead) Tape & Reel
VIN
5V
OFF ON
549 W
VIN
CAT4101
EN/PWM LED
RSET
GND
1A
(Pb ? Free)
?For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specification
Brochure, BRD8011/D.
Figure 1. Typical Application Circuit
? Semiconductor Components Industries, LLC, 2012
July, 2012 ? Rev. 8
1
Publication Order Number:
CAT4101/D
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