Datasheet

VIPER37 Efficiency performances for a typical flyback converter
Doc ID 022218 Rev 1 17/35
7 Efficiency performances for a typical flyback
converter
The efficiency of the converter has been measured in different load and line voltage
conditions. In accordance with the ENERGY STAR
®
average active mode testing efficiency
method, the efficiency measurements have been performed at 25%, 50% and 75% and
100% of the rated output power, at both 115 V
AC
and 230 V
AC
.
Figure 22. Power supply consumption at light output loads, V
OUT
=5 V
Table 9. Power supply efficiency, V
OUT
= 5 V, V
IN
= 115 V
AC
%Load Iout Vout Pout Pin Efficiency
25% 0.75 5.04 3.78 4.83 78.26%
50% 1.5 5.04 7.56 9.72 77.78%
75% 2.25 5.04 11.34 14.84 76.42%
100% 3 5.04 15.12 20.04 75.45%
Average efficiency 76.97%
Table 10. Power supply efficiency, V
OUT
= 5 V, V
IN
= 230 V
AC
%Load Iout Vout Pout Pin Efficiency
25% 0.75 5.04 3.78 5.01 75.45%
50% 1.5 5.04 7.56 9.76 77.46%
75% 2.25 5.04 11.34 14.67 77.30%
100% 3 5.03 15.09 19.59 77.03%
Average efficiency 76.81%
50 100 150 200 250 300
0
50
100
150
200
250
300
350
200mW
100mW
50mW
30mW
Input power [mW]
Input voltage [Vac]