AN4116 datasheet(17/38 Pages) STMICROELECTRONICS

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AN4116

Testing the board

Doc ID 023220 Rev 1

17/38

Figure 21.

Active mode efficiency of the demonstration board and comparison with

energy efficiency standards (IC externally biased)

5.5

Light load performance

The input power of the converter has been measured in no load condition for different input

voltages and the results are reported in

Table 6.

In version 4 of the Code of Conduct, also the power consumption of the power supply when

it is no loaded is considered. The criteria to be compliant with are reported in

Table 7 below:

The performance of the presented board (when the self-supply function is not used) is much

better than required; the power consumption is more than ten times lower than the limit fixed

by version 4 of the Code of Conduct. Even though the performance seems to be

AM11696v1

0.2

0.4

0.6

0.8

Iout [% I

OUT ]

115

230

av @ 115Vac

av @ 230Vac

DOE limit

CoC4 limit

Table 6.

No load input power

VIN [VAC]

PIN [mW]

IC externally biased

IC self-biased

17.2

108

115

18.3

137

150

20.2

178

180

22.1

213

230

25.9

273

265

28.5

314

Table 7.

Energy consumption criteria for no load

Nameplate output power (Pno)

Maximum power in no load for AC-DC EPS

0 W

≤ Pno ≤ 50 W

< 0.3 W

50 W < Pno < 250 W

< 0.5 W

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