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.)
205
204
V SNSE vs. V CS-
300
250
I DIM vs. V DIM
200
203
150
202
100
201
200
V IN = 12V
I LOAD = 350mA
50
0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
0
2
4
6
8
10
12
14
16
V CS- (V)
V DIM (V)
Pin Description
PIN
1, 16
2, 3
4–8, 14
9
10
11
12
13
15
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 3.
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 to enable the output.
Must not be left unconnected.
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.
_______________________________________________________________________________________
5
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