AN2929

Testing the board

Doc ID 15333 Rev 2

19/32

Figure 18.

Input power vs. input voltage for different loads

Figure 19.

Average switching frequency vs. input voltage

Depending on the equipment supplied, we can have several criteria to measure the standby

or light-load performance of a converter. One criterion is the measure of the output power

when the input power is equal to one watt. Table 16 gives the output power needed to have

1 W of input power in different line conditions and Figure 20 illustrates this.

AM02173v1

0

1

2

3

4

80

120

160

200

240

280

F

25 mW

0 mW

50mW

POUT