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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN3276 датащи(PDF) 17 Page - STMicroelectronics |
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AN3276 датащи(HTML) 17 Page - STMicroelectronics |
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17 / 22 page  AN3276 BC2 design in 450 W PFC Doc ID 17975 Rev 1 17/22 Figure 16. Efficiency comparison at 90 V rms Figure 17. 450 W PFC efficiency versus three different output powers and three switching frequencies for Vmains rms = 90 V Figure 17 highlights the benefit of the BC2 circuit soft switching method added to its COSS discharge power saving especially at low load. 83 84 85 86 87 88 89 90 91 92 93 94 95 50 100 150 200 250 300 350 400 450 % BC² solution 8A SIC Continuous mode SiC BC² +1.7% +1.5% +1.2% Fs = 140 kHz V = 90 V mains RMS Efficiency = f(P ) OUT P OUT Efficiency=f(POUT,Fs) 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 52 203 400 POUT % BC² solution 72kHz 8A SIC 72kHz BC² solution 144kHz 8A SIC 144kHz BC² solution 200kHz 8A SIC 200kHz 72KHz 72KHz 72KHz 140KHz 140KHz 200KHz 200KHz 200KHz 140KHz +0.7% +1.7% +2% POUT=50W POUT=200W +0.5% +1.5% +1.6% +0.4% +1.2% +1.5% Efficiency=f(POUT,Fs) POUT=400W Vmains=90VRMS FS= FS= FS= |
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