GE Industrial Solutions CAR0812DC Series - Manual (Page 8)

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 8
Characteristic Curves (continued)
The following figures provide typical characteristics for the CAR0812DC converter at 25 o C
CU
RRE
NT
V
O
(V
) (20
0mV/d
iv)
I
O
(I) (2
0A/d
iv)
V
O
(V
) (2
0m
V/div)
I O
(I)
(5
00
mA/
div)
TIME, t (2ms/div) TIME, t (50ms/div)
Figure 7. 12V transient response for 10 to 60% step load,
Vin: -48V
DC
, slew rate 1A/µs.
Figure 7. 12V transient response for 10 to 60% step load, Vin:
-48V
DC
, slew rate 1A/µs.
Vout Iout
Iout
Total (A)
Iout
unit #1 (A)
Iout
unit #2 (A) Ishare
11.968 25% 35.47 18.54 16.93 1.13%
11.96 30% 42.51 22.07 20.44 1.15%
11.923 50% 70.4 36.09 34.31 1.25%
11.877 75% 106 54.25 51.75 1.76%
11.831 100% 140.86 71.65 69.21 1.72%
Vout Iout
Iout
Total (A)
Iout
DC unit (A)
Iout
AC unit (A) Ishare
11.972 25% 35.32 17.71 17.61 0.07%
11.965 30% 42.4 21.43 20.97 0.32%
11.925 50% 69.91 34.07 35.84 1.25%
11.878 75% 104.74 50.81 53.93 2.20%
11.831 100% 140.09 68.99 71.1 1.49%
Vin = 48Vdc Vin = 48Vdc
Table 9. Current share accuracy among two CAR0812DC
units Table 10. Current share accuracy among a CAR0812AC and a
CAR0812DC unit
(-10°C) 25°C 50°C
Turn ON point (V) 35 34.9 34.9
Turn OFF point (V) 32.7 32.7 32.7
Hysteresis (V) 2.3 2.2 2.2
NO LOAD
(-10°C) 25°C 50°C
Turn ON point (V) 35.8 35.6 35.5
Turn OFF point (V) 33.3 33.5 33.4
Hysteresis (V) 2.5 2.1 2.1
FULL LOAD
Table 11. Input under voltage protection – no load Table 12. Input under voltage protection – full load
RT3 (actual temperature)
Full load 50°C ambient 75°C
Half load 70C ambient 79.1C
Protect point 95C
Recovery point 79C
Table 13. Over-temperature protection; Actual temperature
readings and protection levels.