ISL97691
t FRAME
t L
Ch1 & 2 LEDs
PWM
Dimming
I LED
t R
Ch3 & 4 LEDs
t PWM_ON
t PWM
PWM
Dimming
I LED
t PWM_ON
t PWM
f PWM = 1/t PWM
FIGURE 15. 3D APPLICATION TIMING DIAGRAM
t L
t FRAME
t L
t FRAME
Ch1 & 2 LEDs
PWM
Dimming
I LED
Ch1 & 2 LEDs
PWM
Dimming
I LED
t R
t R
Ch3 & 4 LEDs
PWM
Dimming
I LED
Ch3 & 4 LEDs
t DELAY
PWM
Dimming
I LED
t PWM_ON
t PWM
t PWM_ON
t PWM
FIGURE 16. 2D APPLICATION TIMING DIAGRAM
f PWM = 1/t PWM
25μs
(15~45μs)
100μs
(90~120μs)
250μs
(218μs min)
“1”
“0”
“0”
“1”
“0”
“1”
“Load”
0
200μs
400μs
600μs
800μs
1m s
1.2m s
1.4m s
1.6m s
1.8m s
time
FIGURE 17. 1-WIRE INTERFACE
10
FN7840.1
February 1, 2013
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