Data Sheet
March 26, 2008
JHC/JHW350 Power Module; dc-dc Converter
18 – 36Vdc or 36 – 75Vdc Input; 28Vdc Output; 350W
Characteristic Curves
The following figures provide typical characteristics for the JHC350R (28V, 12.5A) at 25°C. The figures are identical
for either positive or negative Remote On/Off logic.
OUTPUT VOLTAGE, On/Off VOLTAGE
V
ON/OFF
(V) (5V/div)
V
O
(V) (10V/div)
25
INPUT CURRENT, I
IN
(A)
20
I
o
= 12.5A
15
10
5
I
o
= 0A
0
14
16
18
20
22
24
26
28
30
32
34
36
I
o
= 6.5A
INPUT VOLTAGE, V
O
(V)
TIME, t (20 ms/div)
Figure 7. Typical Input Characteristic at Room
Temperature.
94
92
90
88
86
84
82
80
78
76
74
72
70
0
1
2
3
4
5
6
Figure 10. Typical Start-Up Using Remote On/Off,
negative logic, C
o,ext
= 330µF.
OUTPUT VOLTAGE, INPUT VOLTAGE
V
IN
(V) (500mV/div)
V
O
(V) (10V/div)
EFFICIENCY,
η
(%)
V
i
= 18V
V
i
= 24V
V
i
= 36V
7
8
9
10
11
12
13
OUTPUT CURRENT, I
O
(A)
TIME, t (500
μs
/div)
Figure 8. Typical Converter Efficiency Vs. Output
current at Room Temperature.
Figure 11. Typical Transient Response to Step
Decrease in Load from 75% to 50% of
Full Load at Room Temperature and 24 Vdc Input;
C
o,ext
= 330µF.
OUTPUT CURRENT, OUTPUT VOLTAGE
36 Vin
OUTPUT VOLTAGE,
V
O
(V) (50mV/div)
24 Vin
18 Vin
TIME, t (1μs/div)
I
O
(A) (5A/div)
V
O
(V) (500mV/div)
TIME, t (500μs /div)
Figure 9. Typical Output Ripple and Noise at Room
Temperature, I
o
= I
o,max,
C
o,ext
= C
o,min
= 330µF.
Figure 12. Typical Transient Response to Step
Increase in Load from 50% to 75% of Full Load at
Room Temperature and 24 Vdc Input; C
o,ext
= 330µF.
LINEAGE
POWER
7
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
