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High-Voltage, 350mA, High-Brightness LED
Driver with PWM Dimming and 5V Regulator
Typical Operating Characteristics (continued)
(V IN = V EN = +12V, T A = +25°C, unless otherwise noted.)
200Hz DIMMED OPERATION (EXPANDED)
MAX16836 toc11
I LOAD = 350mA
V IN = V EN = 12V
DIM PULSED AT
200Hz (50%
DUTY CYCLE)
V DIM
2V/div
206
204
V SENSE vs. V CS-
I LOAD = 350mA
0V
I LOAD
200mA/div
0A
202
200
20 μ s/div
198
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
V CS- (V)
Pin Description
TQFN
1, 16
2, 3
4–8, 14
9
10
11
12
13
15
—
PIN
SO
8
1
—
2
3
4
5
6
7
—
NAME
OUT
IN
N.C.
CS+
CS-
V5
GND
DIM
EN
EP
FUNCTION
Current-Regulated Output. Connect pin 1 to pin 16.
Positive Input Supply. Bypass IN with a 0.1μF (min) capacitor to GND. Connect pin 2 to pin
No Connection. Not internally connected.
Positive Input of the Internal Differential Amplifier. Connect the current-sense resistor
between CS+ and CS- to program the output current level.
Negative Input of the Internal Differential Amplifier. Connect the current-sense resistor
between CS- and CS+ to program the output current level.
+5V Regulated Output. Connect a 0.1μF capacitor from V5 to GND.
Ground
Pulsed Dimming Input. Drive DIM low to disable the output. Drive DIM high or leave
unconnected to enable the output.
Enable Input. Drive EN high to enable the output.
Exposed Pad. Connect to the ground plane for effective power dissipation. Do not use as
the only ground connection.
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5
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