AN2934

Experimental results

Doc ID 15394 Rev 1

19/27

5.3

Standby and efficiency

Figure 10 shows the board’s standby power. If designing the board with low consumption in

mind, a higher impedance should be used for R8, R9 and R13.

Figure 10.

Standby power

The board’s efficiency with respect to the line voltage and load has also been measured and

is shown in Figure 11 and Figure 12.

Figure 11.

Efficiency vs Vin

AM04435v1

Standby Power

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14

80

130

180

230

280

Vac