Test board: design and evaluation

AN4007

10/33

Doc ID 022455 Rev 2

Figure 6.

No load consumption vs. input voltage

1.4

Light load consumption

Even though the EC CoC and DoE-US EISA 2007 programs don’t have other requirements

regarding light load performance, except no load consumption, the user very often requires

the input power consumption when the output is loaded with a few tens of mW output power.

Such measurements were performed at different loads with brownout protection both

enabled and disabled, the results are reported below. The application meets the new EuP

Lot 6 requirements.

Figure 7.

Light load consumption at different output power without brownout

50

100

150

200

250

300

10

15

20

25

30

35

40

45

50

55

60

65

No brownout

With brownout

Input voltage [Vac]

AM11347v1

AM11345v1

0

50

100

150

200

250

300

350

400

450

50

100

150

200

250

300

30mW

50mW

100mW

250mW

Input voltage [Vac]