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AN3213 数据表(PDF) 31 Page - STMicroelectronics |
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AN3213 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 64 page ![]() AN3213 ST7570 demonstration board description Doc ID 17429 Rev 1 31/64 In Figure 21 the measured response of the whole transmission coupling, loaded with the LISN impedance as set by the EN50065-1 document, is given. The image highlights a further filtering effect added by the passive L-C series resonant combined with the LISN reactive load. Figure 21. Measured frequency response of the Tx active + passive filter loaded with the EN50065-1 LISN impedance (typical) Figure 22 represents the Montecarlo simulation of the cumulated response of transmission active and passive filters, loaded with the LISN impedance, as set by the EN50065-1 document (References 3). Due to the response slope and the effect of power components, the in-band variation is within +/-1.5 dB. Table 5. Line coupling transformer specifications Parameter Value Turn ratio 1:1 Shunt inductance ≥ 1 mH Leakage inductance ≤ 1.5 µH DC total resistance ≤ 0.5 Ω DC saturation current ≥ 15 mA Inter-winding capacitance < 30 pF Withstanding voltage ≥ 4 kV |
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