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LTM8042/LTM8042-1
TYPICAL PERFORMANCE CHARACTERISTICS
LTM8042-1
T A = 25°C, unless otherwise noted.
95
90
85
80
75
70
65
Efficiency vs V IN , Boost Operation,
15.6V at 350mA LED String
95
90
85
80
75
70
65
Efficiency vs V IN , Boost Operation,
18.6V at 350mA LED String
95
90
85
80
75
70
65
Efficiency vs V IN , Boost Operation,
21.6V at 350mA LED String
4
5
6
7
8
9 10 11 12 13 14 15
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
5 6 7 8 9 10 11 12 13 14 15 16 17 18
93
91
89
87
85
83
81
79
77
V IN (V)
80421 G42
Efficiency vs V IN , Boost Operation,
24.8V at 350mA LED String
93
91
89
87
85
83
81
79
77
V IN (V)
80421 G43
Efficiency vs V IN , Buck Mode,
3.7V at 350mA LED String
96
94
92
90
88
86
84
82
V IN (V)
Efficiency vs V IN , Buck Mode,
6.7V at 350mA LED String
80421 G44
75
6
8
10
12
14 16
18
20
22
24
75
4 6 8 10 12 14 16 18 20 22 24 26 28 30 32
80
8 10 12 14 16 18 20 22 24 26 28 30 32 34
98
96
94
92
90
88
86
84
82
80
V IN (V)
80421 G45
Efficiency vs V IN , Buck Mode,
9.7V at 350mA LED String
97
95
93
91
89
87
85
V IN (V)
80421 G46
Efficiency vs V IN , Buck Mode,
12.6V at 350mA LED String
97
95
93
91
89
87
85
V IN (V)
80421 G47
Efficiency vs V IN , Buck Mode,
15.6V at 350mA LED String
11 13 15 17 19 21 23 25 27 29 31 33
14
16
18
20
22
24
26
28
30
32
17
19
21
23
25
27
29
31
33
V IN (V)
80421 G48
V IN (V)
80421 G49
V IN (V)
80421 G50
80421fa
9
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