Rockwell Automation Publication 1606-RM109A-EN-P - August 2020
13
Power Supply —12V, 10 A, 120 W, Single Phase
Efficiency and Power
Losses
AC 100V
AC 120V
AC 230V
Notes
Efficiency
Typ
92.6%
93.2%
94.0%
At 12V, 10 A
92.2%
92.9%
93.8%
At 12V, 12 A (Power Boost)
Average efficiency
(1)
Typ
91.6%
92.0%
92.3%
25% at 2.5 A, 25% at 5 A,
25% at 7.5 A. 25% at 10 A
Power losses
Typ
0.9 W
0.9 W
1.0 W
At 12V, 0 A
4.9 W
4.7 W
4.6 W
At 12V, 5 A
9.6 W
8.8 W
7.7 W
At 12V, 10 A
12.2 W
11.0 W
9.5 W
At 12V, 12 A (Power Boost)
(1)
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.
Figure 14 - Efficiency Versus Output Current at 12V Typical
Figure 15 - Power Losses Versus Output Current at 12V Typical
Efficiency
2
4
6
10
12 A
88
89
90
91
92
93
94%
Output Current
8
(a )
(b )
(c)
(a) 100V AC
(b) 120V AC
(c) 230V AC
87
86
Power Losses
0
4
6
12 A
2
0
4
6
8
12 W
10
10
2
8
Output Current
( a )
( b )
( c)
(a) 100V AC
(b) 120V AC
(c) 230V AC
Figure 16 - Efficiency Versus Input Voltage at 12V, 10 A, Typical
Figure 17 - Losses Versus Input Voltage at 12V, 10 A, Typical
Efficiency
120
180
230
264V AC
89
90
91
92
Input Voltage
93
94
95%
100
Power Losses
120
180
230
264V AC
5
6
7
8
Input Voltage
9
10
11 W
100
