Data Sheet
June 2000
JAHW050A and JAHW075A Power Modules:
dc-dc Converters; 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
Characteristic Curves
The following figures provide typical characteristics for the power modules. The figures are identical for both on/off
configurations.
1.8
1.6
INPUT CURRENT, I
I
(A)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE, V
I
(V)
8-2241 (F)
91
90
EFFICIENCY,
畏
(%)
I
O
= 10 A
I
O
= 5 A
I
O
= 0.5 A
89
88
87
86
85
84
83
82
81
3
4
5
6
7
8
9
10
8-2242 (F)
V
I
= 36 V
V
I
= 48 V
V
I
= 75 V
OUTPUT CURRENT, I
O
(A)
Figure 1. Typical JAHW050A Input Characteristics
at Room Temperature
Figure 3. Typical JAHW050A Converter Efficiency
vs. Output Current at Room Temperature
3
2.5
INPUT CURRENT, I
I
(A)
2
1.5
1
0.5
0
0
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75
INPUT VOLTAGE, V
I
(V)
8-2075 (F)
91
I
O
= 15 A
I
O
= 7.5 A
I
O
= 0.75 A
90
89
EFFICIENCY,
畏
(%)
88
87
86
85
84
83
82
81
3
4
5
6
7
8
9
10 11 12 13 14 15
8-2076 (F)
V
I
= 36 V
V
I
= 48 V
V
I
= 75 V
OUTPUT CURRENT, I
O
(A)
Figure 2. Typical JAHW075A Input Characteristics
at Room Temperature
Figure 4. Typical JAHW075A Converter Efficiency
vs. Output Current at Room Temperature
Lucent Technologies Inc.
5