cat3626 Catalyst Semiconductor, cat3626 Datasheet - Page 12

• Manufacturer Part Number: cat3626
• Description: 6-channel Led Driver With I?c Interface
• Manufacturer: Catalyst Semiconductor

CAT3626
TYPICAL APPLICATION
The CAT3626 is ideal for driving RGB (red green blue)
LEDs with common anode configuration. The individual
LED currents associated with the red, green and blue
LEDs are programmable independently through the I
interface, allowing to generate an accurate color
Doc. No. MD-5014 Rev. C
SDA
SCL
Condition
START
Write Instruction Example setting 20mA current in LEDB1 and LEDB2
ADDRESS
1-7
R/W
3V to
5.5V
8
V
I
2
IN
C Interface
ENABLE
1µF
C
ACK
IN
9
VIN
EN
SDA
SCL
I
C1-
2
C Bus Protocol
1-7
ADDRESS
RGB LED
2
CAT3626
C
1µF
C1+
GND
12
C2-
8
mixing. Dimming while maintaining the same color can
be done by reprogramming the RegEn register on and
off with the appropriate duty cycle (PWM mode).
LEDA1
LEDA2
LEDB1
LEDB2
LEDC1
LEDC2
VOUT
1µF
C2+
ACK
9
1-7
Red
RGB LED
DATA
Green
8
Characteristics subject to change without notice
Blue
ACK
9
Condition
STOP
© Catalyst Semiconductor, Inc.
C
1µF
OUT