Manual
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 7
Characteristic Curves
The following figures provide typical characteristics for the 40A Digital Mega DLynx
TM
at 0.6Vo and 25
o
C.
EFFICIENCY, (%)
OUTPUT CURRENT, Io (A)
OUTPUT CURRENT, I
O
(A)
AMBIENT TEMPERATURE, T
A
O
C
Figure 1. Converter Efficiency versus Output Current.
Figure 2. Derating Output Current versus Ambient
Temperature and Airflow.
OUTPUT VOLTAGE
V
O
(V) (10mV/div)
OUTPUT CURRENT, OUTPUT VOLTAGE
I
O
(A) (20A/div) V
O
(V) (20mV/div)
TIME, t (1s/div)
TIME, t (20s /div)
Figure 3. Typical output ripple and noise (C
O
=6x47uF
ceramic, VIN = 12V, Io = Io,max, ).
Figure 4. Transient Response to Dynamic Load Change from
50% to 100% at 12Vin, Cout= 12x680uF+6x47uF,
CTune=47nF, RTune=180 ohms
OUTPUT VOLTAGE ON/OFF VOLTAGE
V
O
(V) (200mV/div) V
ON/OFF
(V) (5V/div)
OUTPUT VOLTAGE INPUT VOLTAGE
V
O
(V) (200mV/div) V
IN
(V) (5V/div)
TIME, t (1ms/div)
TIME, t (1ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (Io = Io,max).
Figure 6. Typical Start-up Using Input Voltage (VIN = 12V, Io =
Io,max).
70
75
80
85
90
0 10 20 30 40
Vin=14V
Vin=12V
Vin=4.5V
15
20
25
30
35
40
45
45 55 65 75 85 95 105
2m/s
(400LFM)
1.5m/s
(300LFM)
0.5m/s
(100LFM)
NC
Ruggedized (D)
Part (105 C)
Standard Part
(85 C)
1m/s
(200LFM)