Data Sheet
GE
CAR0812DC Series DC-DC Converter
Input: -36VDC to -75VDC; Output: +12 VDC @ 850W; 3.3VDC or 5 VDC @ 1A
Characteristic Curves (continued)
The following figures provide typical characteristics for the CAR0812DC converter at 25oC
TIME, t (2ms/div)
TIME, t (50ms/div)
Figure 7. 12V transient response for 10 to 60% step load,
Vin: -48VDC, slew rate 1A/µs.
Figure 7. 12V transient response for 10 to 60% step load, Vin:
-48VDC, slew rate 1A/µs.
Iout
Iout
Iout
Iout
Iout
Iout
Vout
11.968
11.96
11.923
11.877
11.831
Iout
25%
30%
50%
75%
100%
Total (A) unit #1 (A) unit #2 (A) Ishare
Vout
Iout
25%
30%
50%
75%
100%
Total (A) DC unit (A) AC unit (A) Ishare
35.32
42.4
69.91
104.74
140.09
18.54
22.07
36.09
54.25
71.65
16.93
20.44
34.31
51.75
69.21
35.47
42.51
70.4
106
140.86
1.13%
1.15%
1.25%
1.76%
1.72%
17.71
21.43
34.07
50.81
68.99
17.61
20.97
35.84
53.93
71.1
11.972
11.965
11.925
11.878
11.831
0.07%
0.32%
1.25%
2.20%
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
NO LOAD
FULL LOAD
(-10°C)
35
32.7
2.3
25°C
34.9
32.7
2.2
50°C
34.9
32.7
2.2
(-10°C)
35.8
33.3
2.5
25°C
35.6
33.5
2.1
50°C
35.5
33.4
2.1
Turn ON point (V)
Turn OFF point (V)
Hysteresis (V)
Turn ON point (V)
Turn OFF point (V)
Hysteresis (V)
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
79.1 C
Half load 70 C ambient
Protect point
95 C
Recovery point
79 C
Table 13. Over-temperature protection; Actual temperature
readings and protection levels.
April 23, 2013
©2013 General Electric Company. All rights reserved.
Page 8
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