GE Industrial Solutions 20A Digital MicroDLynx - Manual (Page 7)

GE
Data Sheet
20A Digital MicroDLynx TM : Non-Isolated DC-DC Power Modules
3Vdc –14.4Vdc input; 0.45Vdc to 5.5Vdc output; 20A Output Current
April 24, 2013 ©2012 General Electric Company. All rights reserved. Page 7
Characteristic Curves
The following figures provide typical characteristics for the 20A Digital MicroDLynx TM at 0.6Vo 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 1. Converter Efficiency versus Output Current.
Figure 2. Derating Output Current versus Ambient Temperature
and Airflow.
O
UTP
UT
VO
LTAG
E
V O
(V
) (
10
mV
/d
iv)
O
UTP
UT
CUR
RE
N
T,
O
UTP
U
T
O
LT
AGE
I O
(A
)
(1
0A
di
v)
V O
(V
) (
10
mV
/d
iv)
TIME, t (1  s/div) TIME, t (20  s /div)
Figure 3. Typical output ripple and noise (C
O
=2x47μF
ceramic, V
IN
= 12V, I
o
= I
o,max,
).
Figure 4. Transient Response to Dynamic Load Change from 50%
to 100% at 12Vin, Cout= 1x47uF +11x330uF CTune=47nF,
RTune=178 ohms
O
UTP
UT
VO
LTAG
E
O
N
/O
FF
V
O
LTAG
E
V O
(V
) (
20
0mV
/d
iv
)
V O
N/
O
FF
(V
) (
5V
/d
iv
)
O
UTP
UT
VO
LTAG
E
I
N
PUT
V
O
LT
AGE
V O
(V
) (
20
0mV
/d
iv
)
V
IN
(V
) (
5V
/d
iv)
TIME, t (2ms/div) TIME, t (2ms/div)
Figure 5. Typical Start-up Using On/Off Voltage (I
o
= I
o,max
). Figure 6. Typical Start-up Using Input Voltage (V
IN
= 12V, I
o
= I
o,max
).
50
55
60
65
70
75
80
85
90
0 5 10 15 20
Vin=3.3V
Vin=14V
Vin=12V
2
6
10
14
18
22
55 65 75 85 95 105
0.5m/s
(100LFM)
1.5m/s
(300LFM)
1m/s
( 200LFM )
NC
2m/s
(400LFM)