Rockwell Automation Publication 1606-RM117A-EN-P - July 2020
11
Efficiency and Power
Losses
The average efficiency is an assumption for a typical application where the
power supply is loaded with the following:
•
25% of the nominal load for 25% of the time
•
50% of the nominal load for 25% of the time
•
75% of the nominal load for 25% of the time
•
100% of the nominal load for 25% of the time
Attributes
Values
Notes
AC 100V
AC 120V
AC 230V
Efficiency
Typ
88.9%
90.2%
90.7%
At 12V, 5 A (full load)
Average efficiency
Typ
88.9%
89.7%
89.6%
25% at 1.25 A, 25% at 2.5 A,
25% at 3.75 A. 25% at 5 A
Power losses
Typ
0.2 W
0.2 W
0.3 W
At no load
Typ
3.6 W
3.4 W
3.4 W
At 12V, 2.5 A (half load)
Typ
7.5 W
6.5 W
6.2 W
At 12V, 5 A (full load)
Figure 14 - Efficiency Versus Output Current at 12V, Typ
Figure 15 - Losses Versus Output Current at 12V, Typ
Efficiency
0
86
88
90
85
91%
5 A
1
3
4
Output Current
2
87
89
a) 230V AC
b) 120V AC
c) 100V AC
b
c
a
Power Losses
0
0
7.5 W
5 A
1
3
4
Output Current
2
2.5 W
b
c
a
a) 230V AC
b) 120V AC
c) 100V AC
5 W
Figure 16 - Efficiency Versus Input Voltage at 12V, 5 A, Typ
Figure 17 - Losses Versus Input Voltage at 12V, 5 A, Typ
Efficiency
85
120
155
190
225 260V AC
Input Voltage
91%
88.5
89.5
90.5
90.0
89.0
88.0
Power Losses
3
4
6
8
9
10 W
85
120
155
190
225 260V AC
Input Voltage
5
7
