LTM8040 데이터 시트보기 (PDF) - Linear Technology
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LTM8040 Datasheet PDF : 16 Pages
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LTM8040
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, BIAS = LPWR, VOUT = 4V, ADJ open, RT open, VPWM = 5V,
unless otherwise noted (Note 3).
PARAMETER
CONDITIONS
MIN TYP
MAX
UNITS
LEDA Clamp Voltage
13.2
14.5
V
Minimum BIAS Voltage
2.0
2.6
V
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: This μModule includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
Note 3: The LTM8040E is guaranteed to meet performance specifications
from 0°C to 125°C internal. Specifications over the full –40°C to
125°C internal operating temperature range are assured by design,
characterization and correlation with statistical process controls. The
LTM8040I is guaranteed to meet specifications over the full –40°C to 125°C
internal operating temperature range. Note that the maximum internal
temperature is determined by specific operating conditions in conjunction
with board layout, the rated package thermal resistance and other
environmental factors.
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency - Single 2.66V at
1A LED
90
80
70
60
50
40
30
20
10
0
0
24 VIN
12 VIN
5 VIN
200 400 600 800
OUTPUT CURRENT (mA)
1000
8040 G01
Efficiency - Three 2.66V at
1A LEDs
100
90
80
70
60
50
40
30
20
10
0
0
24 VIN
12 VIN
200 400 600 800 1000
OUTPUT CURRENT (mA)
8040 G02
Efficiency - Single 3.3V at
1A LED
90
80
70
60
50
40
30
20
10
0
0
24 VIN
12 VIN
5 VIN
200 400 600 800
OUTPUT CURRENT (mA)
1000
8040 G04
Efficiency - Two 3.3V at
1A LEDs
100
90
80
70
60
50
40
30
20
10
0
0
24 VIN
12 VIN
200 400 600 800 1000
OUTPUT CURRENT (mA)
8040 G05
Efficiency - Four 2.66V at
1A LEDs
100
90
80
70
60
50
40
30
20
10
24 VIN
12 VIN
0
0 200 400 600 800 1000
OUTPUT CURRENT (mA)
8040 G03
Efficiency - (3 x 3.3V at
1A LEDs)
100
90
80
70
60
50
40
30
20
10
24 VIN
12 VIN
0
0 200 400 600 800 1000
OUTPUT CURRENT (mA)
8040 G06
8040p
3
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