Rainbow Electronics MAX16825 - Manual (Page 5)

MAX16824/MAX16825
High-Voltage, Three-Channel Linear
High-Brightness LED Drivers
_ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ __ _ 5
0
40
20
100
80
60
120
140
180
160
200
-40 -10 5 -25 20 35 50 65 80 95 110 125
OUTPUT CURRENT vs. TEMPERATURE
MAX16824toc04
TEMPERATURE ( °C)
OUTPUT CURRENT (mA)
I OUT = 150mA
I OUT = 95mA
I OUT = 10mA
SUPPLY CURRENT
vs. TEMPERATURE
MAX16824 toc05
TEMPERATURE ( °C)
SUPPLY CURRENT (mA)
110 95 80 65 50 35 20 5 -10 -25
2.45
2.65
2.85
3.05
3.25
3.45
2.25
-40 125
V IN = 28V
V IN = 6.5V
V PWM = V PWM = V PWM = 0
OUTPUT VOLTAGE vs. TEMPERATURE
MAX16824 toc06
V
REG
(V)
4.92
4.94
4.96
4.98
5.00
5.02
5.04
5.06
5.08
5.10
4.90
I LOAD = 0
TEMPERATURE ( °C)
110 95 80 65 50 35 20 5 -10 -25 -40 125
I LOAD = 4mA I LOAD = 1mA
CS_ VOLTAGE vs. REG OUTPUT CURRENT
MAX16824 toc07
I REG (mA)
V
CS_
(V)
9 8 6 7 2 3 4 5 1
0.183
0.184
0.186
0.185
0.187
0.188
0.189
0.190
0.191
0.192
0.193
0.194
0.195
0.196
0.197
0.198
0.199
0.200
0.182
0 10
I LOAD = 100mA
I LOAD = 150mA
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX16824 toc08
V IN (V)
V
REG
(V)
24 20 4 8 12 16
4.965
4.970
4.975
4.980
4.985
4.990
4.995
5.000
4.960
0 28
I REG = 0
I REG = 1mA
I REG = 4mA
2 μs/div
LED CURRENT FALL TIME
0V
0A
2V/div
I OUT_
100mA/div
MAX16824 toc09
I LED = 150mA
V IN = 12V
PULSED AT 200Hz
(50% DUTY CYCLE)
V PWM_
2 μs/div
LED CURRENT RISE TIME
0V
0A
2V/div
I OUT_
100mA/div
MAX16824 toc10
I LED = 150mA
V
IN
= 12V
PULSED AT 200Hz
(50% DUTY CYCLE)
V PWM_
20 μs/div
330Hz DIMMED OPERATION
0V
0A
V PWM_
2V/div
I OUT_
100mA/div
MAX16824 toc11
I LOAD = 150mA
V IN = 12V
PWM_ PULSED
AT 330Hz
(1% DUTY CYCLE)
Typical Operating Characteristics (continued)
(V IN = 12V, C REG = 1µF to GND, I REG = 0, R CS_ = 2Ω from CS_ to GND, T A = +25°C, unless otherwise noted. Typical values are at
T
A
= +25°C.)