GE Industrial Solutions 40A Digital MegaDLynx - Manual (Page 9)

GE
Data Sheet
40A Digital MegaDLynx TM : Non-Isolated DC-DC Power Modules
4.5Vdc –14.4Vdc input; 0.45Vdc to 2.0Vdc output; 40A Output Current
April 24, 2013 ©2012 General Electric Company. All rights reserved. Page 9
Characteristic Curves
The following figures provide typical characteristics for the 40A Digital Mega DLynx TM at 1.8Vo and 25 o C.
EFF
ICI
EN
CY
,

(%)
O
UTP
UT
CUR
RE
N
T,
Io
(A
)
OUTPUT CURRENT, I
O
(A) AMBIENT TEMPERATURE, T
A
O C
Figure 13. Converter Efficiency versus Output Current. Figure 14. Derating Output Current versus Ambient
Temperature and Airflow.
O
UTP
UT
VO
LTAG
E
V
O
(V
) (
20
mV
/d
iv
)
O
UTP
UT
CUR
RE
N
T,
O
UTP
UT
V
O
LTAG
E
I O
(A
)
(2
0A
/d
iv)
V
O
(V
) (
20
mV
/d
iv
)
TIME, t (1  s/div) TIME, t (20  s /div)
Figure 15. Typical output ripple and noise (C
O
=6x47uF
ceramic, V
IN
= 12V, I
o
= I
o,max,
).
Figure 16. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 6x330uF, CTune=5.6nF &
RTune=220 ohms
O
UTP
UT
V
O
LTAG
E
O
N
/O
FF
V
O
LTAG
E
V O
(V
) (
50
0mV
/d
iv)
V O
N/
O
FF
(V
) (
5V
/d
iv)
O
U
TP
UT
VO
LTAG
E
IN
PUT
V
O
LTAG
E
V O
(V
) (
50
0mV
/d
iv)
V
IN
(V
) (
5V
/d
iv)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 17. Typical Start-up Using On/Off Voltage (I
o
= I
o,max
). Figure 18. Typical Start-up Using Input Voltage (V
IN
= 12V, I
o
=
I
o,max
).
70
75
80
85
90
95
100
0 10 20 30 40
Vin=14.4V
Vin=12V
Vin=4.5V
5
10
15
20
25
30
35
40
45
45 55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
1m/s
(200LFM)
0.5m/s
(100LFM)
NC
Standard Part
(85 C)
Ruggedized (D)
Part (105 C)