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High-Voltage, 100mA/200mA Adjustable Linear
High-Brightness LED Drivers with PWM Dimming
Pin Description
TDFN
PIN
SO
NAME
FUNCTION
Pulsed Dimming Input. Drive DIM low to turn off output current (LED current). Drive DIM
1
6
DIM
high to turn on the output current (LED current). DIM is pulled high to V IN when left
unconnected.
—
2
3
7
8
1
EN
OUT
IN
Enable Input. Drive EN high to enable the output. For the TDFN package, this input is not
accessible and always high.
Current-Regulated Output
Positive Input Supply. Bypass IN with a 0.1μF (min) capacitor to GND.
LED Current-Sense Amplifier Positive Input. For the SO package version, connect the
4
2
CS+
current-sense resistor between this pin and CS-; for the TDFN version, connect it between
this pin and ground.
—
5
6
—
3
4
5
—
CS-
V5
GND
EP
LED Current-Sense Amplifier Negative Input. Connect to ground.
+5V Regulated Output. Connect a 0.1μF (min) capacitor from V5 to GND.
Ground
Exposed Pad. Connect to a large ground plane for effective power dissipation. Do not use
as the only ground connection.
TDFN Functional Diagram
BANDGAP
1.2V
DIM
0.8 μ A
IN
V5
AND 5V
REGULATOR
IREG
P
OUT
THERMAL
GND
SHUTDOWN
MAX16815
MAX16828
DIFF
AMP
CS+
6
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