AN3286 datasheet(19/42 Pages) STMICROELECTRONICS

Part #	AN3286

Description	This document describes

PDF	42 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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19 / 42 page

AN3286

Testing the board

Doc ID 17998 Rev 1

19/42

The active mode efficiency is defined as the average of the efficiencies measured at 25%,

50%, and 75% of maximum load and at maximum load itself. Table 9 reports the active

mode efficiency calculated from the values in Table 8. For better visibility, Table 9 values are

plotted in Figure 20.

Figure 20.

Active mode efficiency vs. VIN_AC

In Table 10 and Figure 21 the averaged value of the efficiency versus load are reported

(average has been done considering the efficiency at different values of the input voltage).

Table 9.

Active mode efficiencies

Active mode efficiency

VIN (VAC)

Efficiency (%)

80.67

115

82.00

150

82.48

180

82.40

230

81.78

265

80.97

Table 10.

Line voltage averaged efficiency vs. load

Load (% of full load)

Efficiency (%)

100

80.93

81.28

81.02

82.06

AN3286 Datasheet(PDF) 19 Page - STMicroelectronics