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CAT4008

Catalyst Semiconductor
Part Number CAT4008
Manufacturer Catalyst Semiconductor
Description 8-Channel Constant Current LED Driver
Published Jan 12, 2009
Detailed Description CAT4008 8-Channel Constant Current LED Driver FEATURES „ 8 Constant current-sink channels „ Serial interface up to 25MH...
Datasheet PDF File CAT4008 PDF File

CAT4008
CAT4008

Overview
CAT4008 8-Channel Constant Current LED Driver FEATURES „ 8 Constant current-sink channels „ Serial interface up to 25MHz clock frequency „ 3V to 5.
5V logic supply „ LED www.
DataSheet4U.
com current range from 2mA to 100mA „ LED current set by external RSET resistor „ 300mV LED dropout at 30mA „ Thermal shutdown protection „ Available in RoHS-compliant 16-lead SOIC (150 and 300mil wide), and TSSOP packages DESCRIPTION The CAT4008 is an 8 channel constant current driver for LED billboard and other general display applications.
LED channel currents are programmed together via an external RSET resistor.
Low output voltage operation on the LED channels as low as 0.
4V (for 2 to 100mA LED current) allows for more power efficient designs.
A high-speed 4-wire serial interface of up to 25MHz clock frequency controls each individual channel using a shift register and latch configuration.
A serial output data pin (SOUT) allows multiple devices to be cascaded and programmed via one serial interface.
The device also includes a blanking control pin (BLANK) that can be used to disable all channels independently of the interface.
Thermal shutdown protection is incorporated in the device to disable the LED outputs if the die temperature exceeds a set limit.
The device is available in the 16-lead SOIC (narrow and wide), and TSSOP packages.
APPLICATIONS „ Billboard Display „ Marquee Display „ Instrument Display „ General Purpose Display For Ordering Information details, see page 13.
TYPICAL APPLICATION CIRCUIT VIN 3V to 5.
5V 1µF VDD CONTROLLER 20mA LED1 LED2 LED8 BLANK LATCH SIN CLK GND CAT4008 SOUT RSET to next device 3.
09kΩ © Catalyst Semiconductor, Inc.
Characteristics subject to change without notice 1 Doc.
No.
MD-5034 Rev.
A CAT4008 ORDERING INFORMATION Part Number CAT4008W-T2 CAT4008V-T1 CAT4008Y-T2 Package SOIC16 (N) SOIC16 (W) TSSOP16 (1) (1)(2) Quantity per Reel 2000 1000 2000 Package Marking CAT4008W CAT4008V CAT4008Y (1)(2) PIN CONFIGURATION 16-Lead SOIC (...


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