Datasheet

MAX16804
High-Voltage, 350mA LED Driver with
Analog and PWM Dimming Control
_______________________________________________________________________________________ 5
I
DIM
vs. V
DIM
MAX16804 toc13
V
DIM
(V)
I
DIM
(μA)
1412108642
50
100
150
200
250
300
0
016
V
IN
= 16V
OUTPUT CURRENT DUTY CYCLE
vs. ANALOG DIM VOLTAGE
MAX16804 toc12
ANALOG DIM VOLTAGE (V)
OUTPUT CURRENT DUTY CYCLE (%)
321
20
40
60
80
100
120
0
04
V
IN
= 12V
Typical Operating Characteristics (continued)
(V
IN
= 12V, V
EN
= V
IN
, C
V5
= 0.1µF, I
V5
= 0, CS- = GND, R
SENSE
= 0.56Ω, connect OUT to CS+, V
DIM
= 4V, T
A
= +25°C, unless
otherwise noted.)
Pin Description
PIN NAME FUNCTION
1, 20 OUT Current-Regulated Output. Connect pin 1 to pin 20.
2, 3 IN Input Supply. Bypass IN with a 0.1µF (min) capacitor to GND. Connect pin 2 to pin 3.
4, 9, 11, 18 N.C. No Connection. Leave unconnected (internal connection).
5–8, 10, 16 GND Ground
12, 15 V5 +5V Regulated Output. Connect a 0.1µF capacitor from V5 to GND.
13 CS+
Positive Input of the Internal Differential Amplifier. Connect the current-sense resistor between CS+
and CS- to program the output current level.
14 CS-
Negative Input of the Internal Differential Amplifier. Connect the current-sense resistor between
CS- and CS+ to program the output current level.
17 DIM Dimming Input. See the Dimming Input (DIM) section.
19 EN Enable Input. Drive EN high to enable the output and the 5V LDO.
—EP
Exposed Pad. Connect to the ground plane for effective power dissipation. Do not use as the only
ground connection.