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LTM8042/LTM8042-1
TYPICAL PERFORMANCE CHARACTERISTICS
LTM8042
T A = 25°C, unless otherwise noted.
95
94
93
92
91
90
89
88
87
86
85
Efficiency vs V IN , Buck Mode,
10.1V at 1A LED String
97
96
95
94
93
92
91
90
89
88
87
Efficiency vs V IN , Buck Mode,
13.4V at 1A LED String
97
96
95
94
93
92
91
90
89
88
87
Efficiency vs V IN , Buck Mode,
16.7V at 1A LED String
12 14 16 18 20 22 24 26 28 30 32 34
15 17 19 21 23 25 27 29 31 33
19
21
23
25
27
29
31
33
85
80
75
70
65
60
55
V IN (V)
Efficiency vs V IN , Buck-Boost
Mode, 3.6V at 1A LED String
80421 G10
90
85
80
75
70
V IN (V)
Efficiency vs V IN , Buck-Boost
Mode, 6.8V at 1A LED String
80421 G11
87
86
85
84
83
82
81
80
V IN (V)
80421 G12
Efficiency vs V IN , Buck-Boost
Mode, 10.1V at 1A LED String
4 6 8 10 12 14 16 18 20 22 24 26 28 30
V IN (V)
80421 G13
8
10 12 14 16 18 20 22 24 26
V IN (V)
80421 G14
12 13 14 15 16 17 18 19 20 21 22 23 24
V IN (V)
80421 G15
90
89
88
87
86
85
84
Efficiency vs V IN , Buck-Boost
Mode, 13.4V at 1A LED String
1200
1000
800
600
Maximum LED Current
vs Input Voltage, Boost Operation
7.4V AT 1A
83
82
81
80
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
15
16
17 18
19
20
0
5
10
15
20
25
30
V IN (V)
80421 G16
INPUT VOLTAGE (V)
80421 G17
80421fa
5
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