NH033x-L and NH050x-L Series Power Modules:
5 Vdc Input; 1.2 Vdc to 3.3 Vdc Output; 10 A and 15 A
Data Sheet
March 2010
Thermal Considerations (continued)
6.0
5.5
Convection Requirements for Cooling
5.0
(continued)
4.5
4.0
V
V
I
I
= 5.5 V
= 5.0 V
= 4.5 V
3.5
3.0
2.5
2.0
1.5
6.0
5.5
V
I
5.0
4.5
4.0
V
I
I
= 5.5 V
= 5.0 V
= 4.5 V
1.0
3.5
3.0
2.5
2.0
1.5
1.0
V
0.5
0
1
2
3
4
5
6
7
8
9
10 11 12 13 1415
V
I
OUTPUT CURRENT,
IO (A)
8-2448(C)
Figure 49. NH050F-L Typical Power Dissipation vs.
Output Current, TA = 25 °C
0.5
0
1
2
3
4
5
6
7
8
9
10 11 12 13 1415
IO (A)
OUTPUT CURRENT,
8-2449(C)
With the known power dissipation and a given local
ambient temperature, the minimum airflow can be cho-
sen from the derating curves in Figures 50 and 51.
Figure 47. NH050G-L Typical Power Dissipation vs.
Output Current, TA = 25 °C
4
TYPICAL 5.5I,V
10 AOUT DISSIPATION
3.5
3.0
TYPICAL 5.0I,V
10 AOUT DISSIPATION
3
2
1
0
NATURAL
CONVECTION
0.5 m/s(100 ft./min.)
1.0 m/s (200 ft./min.)
1.5 m/s (300 ft./min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
2.5
VI= 5.5 V
VI= 5.0 V
2.0
1.5
VI = 4.5 V
1.0
0.5
0
25 35 45 55 65 75 85 95 105
AMBIENT TEMPERATURE, TA (˚C)
125
115
0
1
2
3
4
5
6
8
9
10
7
8-1425(C).c
OUTPUT CURRENT, IO (A)
Figure 50. NH033x-L Power Derating vs. Local
Ambient Temperature and Air Velocity
8-2444(C)
Figure 48. NH033F-L Typical Power Dissipation vs.
Output Current, TA = 25 °C
16
Lineage Power
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
