Data Sheet
JHC/JHW350 Power Module; dc-dc Converter
March 26, 2008
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.
25
20
Io = 12.5A
15
Io = 6.5A
10
5
Io = 0A
0
14
16
18 20 22 24 26 28 30 32 34 36
INPUT VOLTAGE, VO (V)
TIME, t (20 ms/div)
Figure 7. Typical Input Characteristic at Room
Temperature.
Figure 10. Typical Start-Up Using Remote On/Off,
negative logic, Co,ext = 330µF.
94
92
90
88
86
Vi = 18V
Vi = 24V
Vi = 36V
84
82
80
78
76
74
72
70
0
1
2
3
4
5
6
7
8
9
10 11 12 13
OUTPUT CURRENT, IO (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;
Co,ext = 330µF.
36 Vin
24 Vin
18 Vin
TIME, t (1μs/div)
TIME, t (500μs /div)
Figure 9. Typical Output Ripple and Noise at Room
Temperature, Io = Io,max, Co,ext = Co,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; Co,ext = 330µF.
LINEAGE POWER
7
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
