GE Industrial Solutions CAR0812DC Series - Manual (Page 7)

GE Data Sheet
CAR0812DC Series DC-DC Converter
Input: -36V
DC
to -75V
DC
; Output: +12 V
DC
@ 850W; 3.3V
DC
or 5 V
DC
@ 1A
April 23, 2013 ©2013 General Electric Company. All rights reserved. Page 7
Characteristic Curves
The following figures provide typical characteristics for the CAR0812DC converter at 25 o C
EFFIC
IENCY,
 (
%
)
V I
(V
) (2
0V
/div
) V
O
(V
) (5V
/div)
V
3.
3
(V
)
(1
V/div)
TIME, t (200ms/div)
Figure 1. Converter Efficiency versus Output Current. Figure 2. Input start up (Vin: -48V
DC
, full load).
ON/OF
F VOLTAGE
OU
TP
UT
VOLTAGE
V
ON
/OFF
(V
) (2
V/d
iv
)
V O
(V)
(5V/di
v)
OUTP
UT VOLT
AGE
V
O
(V
) (2
V/div
)
TIME, t (20ms/div) TIME, t (20ms/div)
Figure 3. Start-up Using Remote On/Off
(Vin: -48V
DC
, load independent)
Figure 4. 12V start-up with 16,000µf external capacitance
(Vin: -48V
DC
, full load)
OU
TP
UT VOLT
AG
E
V
O
(V)
(5
0mV/d
iv)
OU
TP
UT VOLTA
G
E
V O
(V) (
50mV/
div
)
TIME, t (5s/div) TIME, t (20s /div)
Figure 5. 12V output ripple and noise (Vin: -48V
DC
, full load). Figure 6. 3.3V output ripple and noise (Vin: -48V
DC
, full load).
Input
3.3V
12V