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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L7986TR 데이터시트(PDF) 24 Page - STMicroelectronics |
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L7986TR 데이터시트(HTML) 24 Page - STMicroelectronics |
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24 / 43 page  Application information L7986 24/43 DocID022450 Rev 6 6.4.2 Type II compensation network If the equivalent series resistance (ESR) of the output capacitor introduces a zero with a frequency lower than the desired bandwidth (that is: 2 ESR COUT > 1 / BW), this zero helps stabilize the loop. Electrolytic capacitors show non-negligible ESR (> 30 m ), so with this kind of output capacitor the type II network combined with the zero of the ESR allows to stabilize the loop. In Figure 13 the type II network is shown. Figure 13. Type II compensation network The singularities of the network are: Equation 28 fZ1 1 2 R 4 C4 ------------------------------ = fP0 0 = fP1 1 2 R 4 C4 C5 C4 C5 + -------------------- -------------------------------------------- = |
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