GE Industrial Solutions FNW700R Series - Manual (Page 5)

Data Sheet
October 24, 2011 FNW700R Power Modules; DC-DC Converters
36 – 75 Vdc Input; 28Vdc Output; 700W Output
LINEAGE POWER 5
Characteristic Curves
The following figures provide typical characteristics for the FNW700R (28V, 25A) at 25ºC. The figures are identical for
either positive or negative Remote On/Off logic.
E
F
F
IC
IE
NCY
(%)
O
n/O
ff VO
LT
A
G
E
O
U
T
P
UT
V
O
LT
A
G
E
V
ON
/O
F
F
(V
) (2
V
/di
v)
V
O
(V
)
(1
0V
/d
iv
)
OUTPUT CURRENT, I
o
(A) TIME, t (20ms/div)
Figure 1. Converter Efficiency versus Output
Current. Figure 4. Typical Start-Up Using Remote On/Off,
R1=30Kohm; C
o,ext
= 470µF.
O
U
TPU
T
VOLTAGE,
V
O
(V
)
(10
0m
V
/d
iv
)
IN
P
U
T
VO
LTAGE
OU
TPU
T
VO
LTAGE
V
IN
(
V
) (2
0V
/d
iv
)
V
O
(V)
(1
0V
/d
iv
)
TIME, t (1 s/div) TIME, t (20ms/div)
Figure 2. Typical Output Ripple and Noise at Room
Temperature and 48Vin; I
o
= I
o,max
; C
o,ext
= 470µF.
Figure 5. Typical Start-Up Using from V
IN
, positive logic
version shown; C
o,ext
= 470µF.
OU
T
P
U
T
CU
RR
E
N
T
OU
T
P
U
T
VO
LT
A
G
E
I O
(A
)
(1
0A
/d
iv
) V
O
(V) (500mV/
d
iv)
O
U
T
P
UT
C
U
R
R
E
NT
O
U
T
P
UT
VO
LT
AG
E
I O
(A
) (1
0A
/di
v)
V
O
(V
) (5
00
mV
/div
)
TIME, t (1ms/div) TIME, t (1ms/div)
Figure 3. Transient Response to Dynamic Load
Change from 25% to 50% to 25% of Full Load at
Room Temperature and 48 Vdc Input; 0.1A/uS ;
C
o,ext
= 470µF.
Figure 6. Transient Response to Dynamic Load Change
from 50% to 75% to 50% of Full Load at Room
Temperature and 48 Vdc Input; 0.1A/uS ;
C
o,ext
= 470µF.
81
83
85
87
89
91
93
0 5 10 15 20 25
Vin=36V
Vin=48V
Vin=75V