MAX16823_09 Datasheet, PDF (5/12 Pages) Maxim Integrated Products – High-Voltage, 3-Channel Linear High-Brightness LED Driver with Open LED Detection

High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
Pin Description
PIN
TQFN TSSOP
1
3
2
4
3
5
4
6
5, 6, 7 7, 8, 9
8
10
9
11
10
12
11
13
12
14
13
15
14
16
15
1
16
2
—
—
NAME
FUNCTION
DIM1
Dimming Input 1. DIM1 is a low-frequency dimming input for channel 1. A logic-low turns off
OUT1 and a logic-high turns on OUT1.
DIM2
Dimming Input 2. DIM2 is a low-frequency dimming input for channel 2. A logic-low turns off
OUT2 and a logic-high turns on OUT2.
DIM3
Dimming Input 3. DIM3 is a low-frequency dimming input for channel 3. A logic-low turns off
OUT3 and a logic-high turns on OUT3.
Open LED Output. LEDGOOD is an open-drain output. A logic-high indicates the LED
LEDGOOD connection is good in all three channels. A logic-low indicates an open LED connection. See the
LEDGOOD section.
IN
Positive Input Supply. Bypass with a 0.1µF (min) capacitor to GND. Connect all IN
pins together.
LGC
REG
GND
CS3
LED Detection-Timing Setting. Connect a capacitor from LGC to ground to set the delay time
for LEDGOOD.
3.4V Voltage Regulator. Connect a 0.1µF capacitor from REG to GND.
Ground
Channel 3 Sense Amplifier Positive Input. Connect the current-sense resistor between CS3
and GND to program the output current level for channel 3.
CS2
Channel 2 Sense Amplifier Positive Input. Connect the current-sense resistor between CS2
and GND to program the output current level for channel 2.
CS1
OUT3
OUT2
OUT1
EP
Channel 1 Sense Amplifier Positive Input. Connect the current-sense resistor between CS1
and GND to program the output current level for channel 1.
Current Regulator Output 3
Current Regulator Output 2
Current Regulator Output 1
Exposed Pad. Connect EP to a large-area ground plane for effective power dissipation. Do not
use as the IC ground connection.
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