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AN4444 Datasheet(PDF) 27 Page - STMicroelectronics |
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AN4444 Datasheet(HTML) 27 Page - STMicroelectronics |
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27 / 68 page  DocID025925 Rev 2 27/68 AN4444 ST7590 reference design description 68 Figure 14 shows the frequency response of the line driver circuit, while Figure 15 reports the Montecarlo simulation. Figure 14. Measured frequency response of the line driver (typical) Figure 15. Montecarlo simulation of the line driver frequency response 8.1.2 Power line coupling The coupling to the power line requires some passive components in addition to the active filtering stage. In particular, it includes the DC decoupling capacitor C2, the line transformer T1, the power inductor L1 and the X1 safety capacitor C5. L1 has been accurately chosen to have high saturation current (> 2 A) and very low equivalents series resistance (< 0.1 ), to limit distortion and insertion losses even with heavy line load. |
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