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LTM8042/LTM8042-1
TYPICAL PERFORMANCE CHARACTERISTICS
LTM8042
T A = 25°C, unless otherwise noted.
1000
900
800
700
600
500
Maximum LED Current
vs V IN , Buck Mode
1200
1000
800
600
Maximum LED Current vs Input
Voltage, Buck-Boost Mode
400
3.8V AT 1A
7.4V AT 1A
300
200
100
0
7.4V AT 1A
10.9V AT 1A
14.5V AT 1A
18.1V AT 1A
21.4V AT 1A
24.8V AT 1A
400
200
0
10.9V AT 1A
14.5V AT 1A
18.1V AT 1A
21.4V AT 1A
24.8V AT 1A
28.2V AT 1A
0
5
10
15
20
25
30
0
10
20
30
40
V IN (N)
80421 G18
Quiescent Current
INPUT VOLTAGE (V)
80421 G19
Junction Temperature Rise
vs Load, Boost Operation,
100
80
LED Current vs CTL Voltage
40
35
30
vs Input Voltage, Open LED
25
20
8.3V at 1A LED String
60
25
15
5V IN
20
40
20
0
15
10
5
0
10
5
0
0
200
400
600
800
1000
1200
0
5
10
15
20
25
30
0
200
400
600
800
1000
20
ADJUST VOLTAGE (mV)
Junction Temperature Rise
vs Load, Boost Operation,
10.9V at 1A LED String
80421 G20
25
INPUT VOLTAGE (V)
Junction Temperature Rise
vs Load, Boost Operation,
13.6V at 1A LED String
80421 G21
35
LED CURRENT (mA)
Junction Temperature Rise
vs Load, Boost Operation,
18.1V at 1A LED String
80421 G22
18
16
20
30
14
12
7V IN
15
8V IN
25
20
9V IN
10
8
10
15
6
4
2
5
10
5
0
0
0
0
200
400
600
800
1000
0
200
400
600
800
1000
0
200
400
600
800
1000
LED CURRENT (mA)
80421 G23
LED CURRENT (mA)
80421 G24
LED CURRENT (mA)
80421 G25
80421fa
6
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