CAT4134 Datasheet, PDF (10/13 Pages) Catalyst Semiconductor – 500mA Dual Channel Movie/Flash LED Driver

CAT4134
TYPICAL APPLICATIONS
The CAT4134 can drive one or two strings of 2 to 3
LEDs in series resulting in combinations of 2, 3, 4, 6
LEDs.
The resistor ratio R1/R2 sets the maximum VOUT
during an open-LED fault condition and provides the
overvoltage protection.
For applications with 2 LEDs in series and VOUT_MAX
at 10V, the ratio R1/R2 is 7.
For applications with 3 LEDs in series and VOUT_MAX
at 13.5V, the ratio R1/R2 is 10.
2 LED Application
4 LED Application
3 LED Application
6 LED Application
Doc. No. 5021 Rev. A
10
© 2006 Catalyst Semiconductor, Inc.
Characteristics subject to change without notice.