MAX16823_09 Datasheet, PDF (4/12 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
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
1.0
0.9
0.8
0.7
0.6
0.5
0.4
I_LOAD = 70mA
0.3
0.2
0.1
0
-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
I_LOAD = 70mA
0.200
0.199
0.198
0.197
0.196
0.195
0 1 2 3 4 5 6 7 8 9 10
I_REG (mA)
SUPPLY CURRENT vs. TEMPERATURE
1.4
V_DIM1 = V_DIM2 = V_DIM3 = 0V
1.3
1.2
V_IN = 40V
1.1
V_IN = 20V
1.0
0.9
0.8
V_IN = 12V _{VIN = 5.5V}
0.7
0.6
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
V_REG vs. V_IN
3.45
3.44
3.43
3.42
3.41
I_REG = 0
3.40
3.39
3.38 IREG = 1mA
3.37
I_REG = 4mA
3.36
3.35
0
5 10 15 20 25 30 35 40
V_IN (V)
V_REG vs. TEMPERATURE
3.5
I_LOAD = 0
3.4
3.3
I_LOAD = 4mA ^{ILOAD = 1mA}
3.2
3.1
3.0
-40 -25 -10 5 20 35 50 65 80 95 110 125
TEMPERATURE (°C)
330Hz DIMMED OPERATION
MAX16823 toc09
I_LOAD = 70mA
V_IN = 12V, DIM
PULSED AT 33Hz
(1% DUTY CYCLE)
V_DIM
2V/div
0V
I_LED
50mA/div
0A
20μs/div
200Hz DIMMED OPERATION (EXPANDED)
MAX16823 toc10
V_DIM
2V/div
0V
I_LOAD
I_LOAD = 70mA
V_IN = 12V, DIM
PULSED AT 200Hz
50mA/div
0A
(50% DUTY CYCLE)
10μs/div
200Hz DIMMED OPERATION (EXPANDED)
MAX16823 toc11
I_LOAD = 70mA
V_IN = 12V, DIM
PULSED AT 200Hz
(50% DUTY CYCLE)
V_DIM
2V/div
0V
I_LOAD
50mA/div
0A
10μs/div
LEDGOOD RESPONSE TIMES
MAX16823 toc12
V_IN = 12V
C_LGC = 15nF
V_DIM
5V/div
0V
V_LEDGOOD
5V/div
0V
V_LGC
5V/div
0V
2ms/div
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