High-Voltage, 3-Channel Linear High-Brightness
LED Driver with Open LED Detection
MAX16823
Typical Operating Characteristics (continued)
(V
IN
= 12V, C
REG
= 0.1µF, I
REG
= 0, V
LGC
= unconnected, connect R
CS_
= 2.85Ω from CS_ to GND. Connect OUT_ to CS_ through
a resistor, T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
DROPOUT VOLTAGE vs. TEMPERATURE
MAX16823 toc04
SUPPLY CURRENT vs. TEMPERATURE
MAX16823 toc05
V
REG
vs. TEMPERATURE
I
LOAD
= 0
3.4
MAX16823 toc06
MAX16823 toc09
MAX16823 toc08
1.0
0.9
0.8
DROPOUT VOLTAGE (mV)
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
I
LOAD
= 70mA
1.4
1.3
SUPPLY CURRENT (mA)
1.2
1.1
1.0
0.9
0.8
V
IN
= 12V
0.7
0.6
V
IN
= 5.5V
V
IN
= 20V
V
IN
= 40V
V
DIM1
= V
DIM2
= V
DIM3
= 0V
3.5
V
REG
(V)
3.3
I
LOAD
= 4mA
3.2
I
LOAD
= 1mA
3.1
3.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V
CS_
vs. I
REG
0.210
0.209
0.208
0.207
0.206
0.205
0.204
0.203
0.202
0.201
0.200
0.199
0.198
0.197
0.196
0.195
0
1
2
3
MAX16823 toc07
V
REG
vs. V
IN
3.45
3.44
3.43
3.42
V
REG
(V)
3.41
3.40
3.39
3.38
3.37
3.36
3.35
I
REG
= 1mA
I
REG
= 4mA
I
REG
= 0
330Hz DIMMED OPERATION
I
LOAD
= 70mA
V
IN
= 12V, DIM
PULSED AT 33Hz
(1% DUTY CYCLE)
V
DIM
2V/div
0V
I
LED
50mA/div
0A
V
CS_
(V)
I
LOAD
= 70mA
4 5 6
I
REG
(mA)
7
8
9
10
0
5
10
15
20 25
V
IN
(V)
30
35
40
20μs/div
200Hz DIMMED OPERATION (EXPANDED)
MAX16823 toc10
200Hz DIMMED OPERATION (EXPANDED)
MAX16823 toc11
LEDGOOD RESPONSE TIMES
MAX16823 toc12
V
DIM
2V/div
0V
I
LOAD
50mA/div
I
LOAD
= 70mA
0A
V
IN
= 12V, DIM
PULSED AT 200Hz
(50% DUTY CYCLE)
10μs/div
I
LOAD
= 70mA
V
IN
= 12V, DIM
PULSED AT 200Hz
(50% DUTY CYCLE)
V
DIM
2V/div
0V
I
LOAD
50mA/div
0A
V
IN
= 12V
C
LGC
= 15nF
V
DIM
5V/div
0V
V
LEDGOOD
5V/div
0V
V
LGC
5V/div
0V
10μs/div
2ms/div
4
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
