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9. Efficiency and Power Losses
Efficiency
Average efficiency
*)
Power losses
*)
The average efficiency is an assumption for a typical application where the power supply is loaded with 25% of the nominal load for 25%
of the time, 50% of the nominal load for another 25% of the time, 75% of the nominal load for another 25% of the time and with 100%
of the nominal load for the rest of the time.
Fig. 9-1 Efficiency vs. output current at 48V,
typ
Efficiency
96%
94
92
90
88
86
Output Current
84
0
1
2
3
4
5
Fig. 9-3 Efficiency vs. input voltage at 48V,
10A, typ.
Efficiency
95%
94
93
92
91
90
Input Voltage
89
100
120
180
All parameters are specified at 48V, 10A, 230Vac, 25°C ambient and after a 5 minutes run-in time, unless noted otherwise.
AC 100V
typ.
92.0%
typ.
91.8%
typ.
91.1%
typ.
6.1W
typ.
22.5W
typ.
41.7W
typ.
51.5W
c
b
a
a) 100Vac
b) 120Vac
c) 230Vac
6
7
8
9 10
11
12A
230
264Vac
Rockwell Automation Publication 1606-RM043A-EN-P — March 2014
AC 120V
AC 230V
92.6%
93.9%
92.3%
93.9%
91.7%
92.8%
3.6W
2.4W
21.6W
18.3W
38.4W
31.2W
48.0W
37.4W
Fig. 9-2 Losses vs. output current at 48V, typ.
Power Losses
60W
a) 100Vac
50
b) 120Vac
c) 230Vac
40
30
20
10
Output Current
0
0
1
2
3
4
5
6
Fig. 9-4 Losses vs. input voltage at 48V, 10A,
typ.
Power Losses
50W
45
40
35
30
25
Input Voltage
20
100
120
180
Bulletin 1606 Switched Mode Power Supplies
at 48V, 10A
at 48V, 12A (Power Boost)
25% at 2.5A, 25% at 5A,
25% at 7.5A. 25% at 10A
at 48V, 0A
at 48V, 5A
at 48V, 10A
at 48V, 12A (Power Boost)
a
b
c
7
8
9 10
11
12A
230
264Vac
9
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