Datasheet

MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
10
Maxim Integrated
data. Holding OE low allows the output channels to fol-
low the state of the output latches. The duty cycle
depends on LE’s frequency. All output channels are
affected at the same time.
Another method of pulse dimming the outputs is to hold
LE high and drive OE with a PWM signal. Because the
input bits are always latched, the serial input constantly
refreshes the register. The control bits must be carefully
selected to dim the outputs properly.
LE
CLK
DO
D1
D2
DO
t
R
t
F
t
OEL
t
OEH
t
OEW
20%
80%
t
DO
t
DS
t
DH
t
CL
t
CH
t
CP
t
LW
t
LS
DIN
DOUT
OE
OUT_
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
50%
Figure 3. 4-Wire Serial-Interface Timing Diagram