LTM8042_15 Datasheet, PDF (6/32 Pages) Linear Technology – Module Boost LED Driver and Current Source

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