EVL150W-ADP-SR 查看數據表（PDF） - STMicroelectronics

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EVL150W-ADP-SR

12 V - 150 W resonant converter with synchronous rectification using the L6563H, L6599A, and SRK2000

STMicroelectronics 

AN3233

2

Efficiency measurement

Efficiency measurement

EPA rev. 2.0 external power supply compliance verification

Table 1 shows the no-load consumption and the overall efficiency, measured at the nominal

mains voltages. At 115 Vac the average efficiency is 90.6 %, while at 230 Vac it is 91.8 %.

Both values are much higher than the 87 % required by EPA rev 2.0 external power supply

(EPS) limits.

The efficiency at nominal load, 230 Vac, is 94 %, which is a very high efficiency for a double

stage converter and confirms the benefit of implemented SR.

Also at no load the board performances are superior: maximum no-load consumption at

nominal mains voltage is 200 mW; this value is significantly lower than the limit imposed by

the ENERGY STAR program which is 500 mW.

Table 1. Overall efficiency

230 V - 50 Hz

115 V - 60 Hz

Test

Vout Iout Pout Pin

Eff. Vout Iout Pout Pin

Eff.

[V] [A] [W] [W] [%] [V] [A] [W] [W] [%]

No load 12.10 0.00 0.00 0.20 ----------- 12.10 0.00 0.00 0.20 -----------

25 % load eff. 12.14 3.10 37.63 43.15 87.2 % 12.13 3.10 37.60 43.08 87.3 %

50 % load eff. 12.14 6.19 75.15 81.30 92.4 % 12.12 6.19 75.02 82.34 91.1 %

75 % load eff. 12.08 9.37 113.19 120.81 93.7 % 12.07 9.38 113.22 123.00 92.0 %

100 % load eff. 12.04 12.47 150.14 159.79 94.0 % 12.04 12.50 150.50 163.90 91.8 %

Average eff.

91.8 %

90.6 %

Doc ID 17595 Rev 1

11/35

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