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Datenblatt-Suchmaschine für elektronische Bauteile |
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Datenblatt-Suchmaschine für elektronische Bauteile |
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AN628 Datenblatt(PDF) 16 Page - STMicroelectronics |
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AN628 Datenblatt(HTML) 16 Page - STMicroelectronics |
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16 / 35 page  AN628 APPLICATION NOTE 16/35 where: Rfm is the programming current resistor. K is a constant value = 0.1157 for R value in K Ω and fSW in KHz. A typical 20% can be a good compromise. Figure 18. f sw ∆ f sw ----------- Vl 0.8 1 0.4 0.2 0 0 45 90 135 Electrical degrees 180 0.8 1 0.4 0.2 0 fsw + - 1.28V 17 I 18 COSC 10I - + 200I 8.5V 1 1/VMRS 7 Ifm 16 FREQ-MOD D94IN065A ROSC COSC ROSC Rfm 2 POLES FILTER VRMS a) b) c) Modulation Frequency Normalzed in an Half Cycle of the Mains Voltage |
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