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AN3286 データシート(PDF) 21 Page - STMicroelectronics |
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AN3286 データシート(HTML) 21 Page - STMicroelectronics |
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21 / 42 page  AN3286 Testing the board Doc ID 17998 Rev 1 21/42 The criteria are plotted in Figure 22, where the red line depicts the criteria for the standard model and the blue line the criteria for the low voltage model. The PNO axis uses a logarithmic scale. Figure 22. ENERGY STAR efficiency criteria The presented power supply belongs to the low-voltage power supply category and, in order to be compliant with ENERGY STAR requirements, needs to have an efficiency higher than 73.37%. For all the considered input voltages, the efficiency results (see Table 8) are higher than the recommended value. 2.5 Light load performances The input power of the converter was measured in no load conditions for different input voltages. The results are given in Table 13. Version 2.0 of the ENERGY STAR program also takes into consideration the power consumption of the power supply when it is not loaded. The criteria to be compliant with are reported in Table 14. Table 13. No load input power VIN (VAC) PIN (mW) 90 15 115 17 150 20 180 23 230 28 265 33 |
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