CAT4103V-GT2 Datasheet, PDF (1/13 Pages) ON Semiconductor – 3-Channel Constant-Current RGB LED Driver

3-Channel Constant-Current RGB LED Driver
CAT4103
FEATURES
„ 3 independent current sinks rated to 25V
„ LED current to 175mA per channel set by
separate external resistors
„ High-speed 25MHz 4-wire serial interface
„ Buffered output drivers to ensure data integrity
„ Cascadable devices
„ Low dropout current source (0.4V at 175mA)
„ 3V to 5.5V logic supply
„ Thermal shutdown protection
„ RoHS-compliant 16-lead SOIC package
APPLICATIONS
„ Multi-color, intelligent LED, architectural
lighting
„ High-visual impact LED signs and displays
„ LCD backlight
DESCRIPTION
The CAT4103 is a 3-channel, linear based constant-
current LED driver designed for RGB LED control,
requiring no inductor and provides a low noise operation.
LED channel currents up to 175mA are programmed
independently via separate external resistors. Low output
voltage operation of 0.4V at 175mA allows for more
power efficient designs across wider supply voltage
range. The three LED pins are compatible with high
voltage up to 25V supporting applications with long
strings of LEDs.
A high-speed 4-wire 25MHz serial interface controls each
individual channel using a shift register and latch
configuration. Output data pins allow multiple devices to
be cascaded and programmed via one serial interface
with no need for external drivers or timing considerations.
The device also includes a blanking control pin (BIN) that
can be used to disable all channels independently of the
interface.
ORDERING INFORMATION
Part
Number
Package
Quantity
per Reel
CAT4103V-GT2 SOIC-16* 2,000
* Lead Finish NiPdAu
Package
Marking
CAT4103V
Thermal shutdown protection is incorporated in the device
to disable the LED outputs whenever the die temperature
exceeds 150ºC.
The device is available in a 16-lead SOIC package.
PIN CONFIGURATION
16-Lead SOIC (W)
Top View
GND
1
BIN
2
LIN
3
SIN
4
CIN
5
RSET3
6
RSET2
7
RSET1
8
16
VDD
15
BOUT
14
LOUT
13
SOUT
12
COUT
11
LED1
10
LED2
9
LED3
TYPICAL APPLICATION CIRCUIT
VIN
5V to 25V
VDD
3V to 5.5V
CONTROLLER
C1
1µF
VDD
RED
LED1
GREEN BLUE
LED2
LED3
BIN
BOUT
LIN
LOUT
CAT4103
SIN
SOUT
CIN
COUT
GND RSET1 RSET2 RSET3
R1
R2
R3
NEXT
CAT4103
DEVICE
© 2008 SCILLC. All rights reserved.
1
Characteristics subject to change without notice
Doc. No. MD-5038, Rev. A