
20
Lucent Technologies Inc.
Data Sheet
August 1998
18 Vdc to 36 Vdc or 36 Vdc to 75 Vdc Inputs, 10 W and 15 W
LC/LW010- and LC/LW015-Series Power Modules:
Thermal Considerations (continued)
8-1383(C)
Note: The power dissipation of this unit is shown at TC = TC, max
because the efciency of this power module drops at high
temperatures.
Figure 53. LW015A Power Dissipation at Maximum
Case Temperature
8-1814(C)
Figure 54. LW015B, C Typical Power Dissipation vs.
Normalized Output Current at TC = 25
°C
8-1815(C)
Figure 55. LW010D, LW015D Typical Power
Dissipation vs. Output Current at
TC = 25
°C
8-2109(C)
Figure 56. LW010D9 Typical Power Dissipation vs.
Output Current at TC = 25
°C with Output
Voltage Trimmed Up to 2.5 V
8-1385(C)
Note: The power dissipation of this unit is shown at TC = TC, max
because the efciency of this power module drops at high
temperatures.
Figure 57. LW015F Power Dissipation at Maximum
Case Temperature
0.0
0.5
1.0
1.5
2.0
3.0
0.0
3.0
3.5
4.0
4.5
OUTPUT CURRENT, IO (A)
POWER
DISSIPATION,
P
D
(W)
2.5
2.0
0.5
2.5
VI = 48 V
VI = 60 V
VI = 75 V
1.0
1.5
VI = 36 V
0.19
0.33
0.50
0.83
0.66
1.00
0.0
3.0
NORMALIZED OUTPUT CURRENT (IO/IO, max)
2.0
1.5
2.5
4.0
0.05
3.5
1.0
0.5
4.5
5.0
POWER
DISSIPATION,
P
D
(W)
VI = 36 V
VI = 48 V
VI = 60 V
VI = 75 V
1.0
0.0
2.0
3.0
3.5
0.5
1.5
2.5
0.5
1.0
1.5
2.0
2.5
3.0
0.0
OUTPUT CURRENT, IO (A)
VI = 36 V
POWER
DISSIPATION,
P
D
(W)
VI = 48 V
VI = 60 V
VI = 75 V
0.4
0.6
0.8
1.0
1.2
1.4
2.0
0.2
1.6
1.8
0.0
0.5
2.1
1.7
1.5
1.9
2.5
2.3
1.3
1.1
0.9
0.7
OUTPUT CURRENT, IO (A)
POWER
DISSIPATION,
P
D
(W)
VI = 36 V
VI = 75 V
VI = 48 V
0.0
0.5
1.0
1.5
2.0
3.0
0.0
3.0
3.5
OUTPUT CURRENT, IO (A)
POWER
DISSIPATION,
P
D
(W)
2.5
2.0
0.5
2.5
VI = 75 V
VI = 48 V
VI = 60 V
1.0
1.5
VI = 36 V
4.0