CAT4008 Datasheet, PDF (1/13 Pages) Catalyst Semiconductor – 8-Channel Constant Current LED Driver

CAT4008
8-Channel Constant Current
LED Driver
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 0.4 V (for 2 to
100 mA LED current) allows for more power efficient designs.
A high−speed 4−wire serial interface of up to 25 MHz 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.
Features
• 8 Constant Current−sink Channels
• Serial Interface up to 25 MHz Clock Frequency
• 3 V to 5.5 V Logic Supply
• LED Current Range from 2 mA to 100 mA
• LED Current set by External RSET Resistor
• 300 mV LED Dropout at 30 mA
• Thermal Shutdown Protection
• Available in 16−lead SOIC (150 and 300 mil wide), and TSSOP
Packages
• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
Compliant
Applications
• Billboard Display
• Marquee Display
• Instrument Display
• General Purpose Display
http://onsemi.com
1
SOIC−16
W SUFFIX
CASE 751BG
1
1
SOIC−16
V SUFFIX
CASE 751BH
TSSOP−16
Y SUFFIX
CASE 948AN
PIN CONNECTIONS
1
GND
VDD
SIN
RSET
SCLK
SOUT
XLAT
BLANK
LED1
LED8
LED2
LED7
LED3
LED6
LED4
LED5
16−Lead SOIC (W, V), TSSOP (Y)
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 13 of this data sheet.
MARKING DIAGRAMS
A = Assembly Location
3 = Lead Finish − Matte−Tin
B = Product Revision (Fixed as “B”)
CAT4008W, CAT4008V, 4008Y = Device Code
Z or ZZ = Leave Blank
Y = Production Year (Last Digit)
M = Production Month (1-9, A, B, C)
XXX or XXXX = Last Three of Four Digits of
XXX or XXXX = Assembly Lot Number
© Semiconductor Components Industries, LLC, 2010
March, 2010 − Rev. 2
A3B
CAT4008VZ
YMXXXX
CAT4008V−T1
1
A3B
CAT4008WZ
YMXXXX
CAT4008W−T2
AB
4008YZZ
3YMXXX
CAT4008Y−T2 or
CAT4008Y−GT2
Publication Order Number:
CAT4008/D