VIPER35 datasheet(18/44 Pages) STMICROELECTRONICS

18 / 44 page

Efficiency performance for a typical flyback converter

VIPer35

18/44

DocID026980 Rev 4

Efficiency performance 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, both at 115 VAC and 230 VAC.

Table 8. Power supply efficiency, VOUT = 12 V, VIN = 115 VAC

%load

IOUT [A]

VOUT [V]

POUT [W]

PIN[W]

Efficiency [%]

25%

0.31

12.1

3.78

4.53

83.47

50%

0.63

12.1

7.56

8.98

84.21

75%

0.94

12.1

11.34

13.4

84.65

100%

1.25

12.1

15.12

17.93

84.36

Average efficiency

84.17

Table 9. Power supply efficiency, VOUT = 12 V, VIN = 230 VAC

%load

IOUT [A]

VOUT [V]

POUT [W]

PIN[W]

Efficiency [%]

25%

0.31

12.1

3.78

4.71

80.28

50%

0.63

12.1

7.56

9.22

82.02

75%

0.94

12.1

11.34

13.53

83.84

100%

1.25

12.1

15.12

17.77

85.12

Average efficiency

82.82

Figure 25. Power supply consumption at light

output loads, VOUT = 12 V

Figure 26. Power supply consumption at no

output load, VOUT = 12 V

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