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CAT4201

350mA High Efficiency Step Down LED Driver



Features Description Applications

FEATURES
  • LED drive current up to 350mA
  • Compatible with 12V and 24V standard systems
  • Handles transients up to 40V
  • Single Pin Control and Dimming function
  • Power Efficiency up to 94%
  • Drives LED strings of up to 32V
  • Open and short LED protection
  • Parallel configuration for higher output current
  • RoHS-compliant TSOT-23 5-lead package
DESCRIPTION

The CAT4201 is a high efficiency step-down converter optimized to drive high current LEDs. A patented switching control algorithm allows highly efficient and accurate LED current regulation. A single RSET resistor sets the full scale LED string current up to 350mA from supplies as high as 36V.

The switching architecture of the CAT4201 results in extremely low internal power dissipation allowing the device to be housed in a tiny package without the need for dedicated heat sinking. The device is compatible with switching frequencies of up to 1MHz, making it ideal for applications requiring small footprint and low value external inductors.

Analog dimming and LED shutdown control is provided via a single input pin, CTRL. Additional features include overload current protection and thermal shutdown. The device is available in the low profile 5-lead thin SOT23 package and is ideal for space constrained applications.

TYPICAL APPLICATION

CAT 4201 typical application

APPLICATIONS
  • 12V and 24V Lighting Systems
  • Automotive and Aircraft Lighting
  • General lighting
  • High Brightness 350mA LEDs
 
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Download Data Sheet
Tape and Reel info

Technical Article
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APPLICATION  NOTES
CAT4201 LED Driver Design Tool (AN45) (PDF)

CAT4201 LED Driver Evaluation Board (AN35) (PDF)


PRESS  RELEASE
Catalyst Announces High-Efficiency 7W Buck LED Driver in TSOT-23 Package (July 26, 2007)
            

Catalyst Granted Patent on Switching Architecture for Simpler, ‘Greener’ Design of High-Power LED Lighting Products
            
 
4201