AN3011 datasheet(14/37 Pages) STMICROELECTRONICS

Part #	AN3011

Description	In certain applications such as LCD or plasma TVs

PDF	37 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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14 / 37 page

Efficiency

AN3011

14/37

Doc ID 16043 Rev 1

Efficiency

The efficiency of the converter was measured in different load and line voltage conditions. In

accordance with the ENERGY STAR

® active mode testing efficiency method, the

measurements are done with different load values (full-load, 75%, 50%, and 25% of the full-

load) for different input voltages. The results are given in Table 5 below.

For better visibility the results are plotted in the diagrams below. In Figure 15, efficiency

versus converter AC input voltage (VIN), for four different load values, is plotted. In

Figure 16

, the value of efficiency versus load for different input voltages is plotted.

Figure 15.

Efficiency vs VIN

Table 5.

Efficiency

VINAC

(VRMS)

Efficiency (%)

Full load (2.2 A)

75 % load (1.65

50 % load (1.1 A)

25 % load (0.55

73.0

75.1

76.9

77.9

115

75.3

76.5

77.9

78.1

132

75.9

76.9

77.8

77.7

175

76.8

77.3

77.6

76.4

230

77.4

77.6

77.3

75.4

265

76.8

76.9

76.3

74.2

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