cat4103 ON Semiconductor, cat4103 Datasheet - Page 9

• Manufacturer Part Number: cat4103
• Description: 3-channel Constant-current Rgb Led Driver
• Manufacturer: ON Semiconductor

APPLICATION INFORMATION
CASCADING MULTIPLE DEVICES
The CAT4103 is designed to be cascaded for driving
multiple RGD LEDs. Figure 5 shows three CAT4103
drivers cascaded together. The programming data
from the controller travels serially through each
device. Figure 4 shows a programming example
turning on the following LED channels: BLUE3,
GREEN2 and RED1. The programming waveforms
are measured from the controller to the inputs of the
first CAT4103.
5V
© 2008 SCILLC. All rights reserved.
Characteristics subject to change without notice
C1
1µF
BIN
LIN
SIN
CIN
VDD
GND RSET1
LED1
RED1
R1
CAT4103
RSET2
LED2
#1
GREEN1
R2
RSET3
LED3
COUT
BOUT
SOUT
LOUT
Figure 5. Three Cascaded CAT4103 Devices
BLUE1
R3
C2
1µF
BIN
LIN
SIN
CIN
VDD
GND RSET1
LED1
RED2
R4
9
CAT4103
RSET2
#2
LED2
GREEN2
R5
RSET3
LED3
Figure 4. Programming Example
COUT
BOUT
SOUT
LOUT
BLUE2
R6
C3
1µF
BIN
LIN
SIN
CIN
VDD
GND RSET1
LED1
RED3
R7
CAT4103
RSET2
#3
LED2
Doc. No. MD-5038, Rev. A
GREEN3
R8
CAT4103
RSET3
LED3
COUT
BOUT
SOUT
LOUT
BLUE3
R9