AN2852 datasheet(18/35 Pages) STMICROELECTRONICS

Part #	AN2852

Description	This document describes the characteristics and performance of a 90 W wide range input

PDF	35 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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Electrical performance

AN2852

18/35

The efficiency taken at 25%, 50%, 75% and 100% of rated load allows calculating the

average efficiency required by the ENERGY STAR® specification.

Table 4 shows the no-load consumption. The adapter has good values (about 300 mW at

230Vac), considering that it is a two-stage system with the PFC stage always on.

This adapter meets the two conditions required by ENERGY STAR® specification version

2.0 (average efficiency > 87% and no-load input power < 0.5 W) for an external power

supply (EPS). Therefore this SMPS is EPA 2.0 compliant.

Figure 16 shows the graph of the efficiency vs. output power while Figure 17 shows the

graph of the input power vs. input voltage with no load applied.

Figure 16.

Efficiency vs. O/P power

Table 3.

Average efficiency for EPA

Vin [Vrms]

Average efficiency for EPA

115

87.44%

230

88.19%

Table 4.

No-load consumption

Vin [Vac]

115

135

180

230

264

Pin [W]

0.215

0.225

0.235

0.255

0.290

0.315

AM01831v1

Efficiency

66.00%

68.00%

70.00%

72.00%

74.00%

76.00%

78.00%

80.00%

82.00%

84.00%

86.00%

88.00%

90.00%

92.00%

020

100

Output power [W]

115Vac

230Vac

AN2852 Datasheet(PDF) 18 Page - STMicroelectronics

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