5.2

Energy saving performances

The VIPER31 allows the design of applications compliant with the most stringent energy saving regulations. In

order to show the typical performances achievable, the active mode average efficiency and the efficiency at 10%

of the rated output power of a single output flyback converter using VIPER31 have been measured and are

reported in Table 9. In addition, Figure 44, Figure 45 show no-load and light load consumptions.

Table 9. Power supply efficiency, VOUT = 15 V

Parameter

VIN

10% output load

efficiency [%]

Active mode average

efficiency [%]

Pin @ no-load

[mW]

Flyback iso, 15V/1.2A

115 VAC

83.2

85.9

26.0

230 VAC

77.4

86.6

29.7

Figure 44. Input power vs VIN in no-load condition, VOUT = 15V

10

20

30

40

50

100

150

200

250

300

VIN [VAC]

VIPER31

Application information

DS13285 - Rev 6

page 28/39