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数据搜索系统，热门电子元器件搜索 |
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L6983 数据表(PDF) 27 Page - STMicroelectronics |
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L6983 数据表(HTML) 27 Page - STMicroelectronics |
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27 / 63 page  mC=1+SeSn Se=ISLOPE∙fSW Sn=VIN−VOUT L (14) FHs = 1 1+ sωn∙QP+s2ωn2 (15) where: QP= 1 π∙ mC∙ 1−D −0.5 (16) 7.2 Error amplifier compensation network The following figure shows the typical compensation network required to stabilize the system. Figure 24. Trans-conductance embedded error amplifier VREF FB E/A RC CC RC CC RO CO V V Gm dV REF FB dV RC and CC introduce a pole and a zero in the open loop gain. The transfer function of the error amplifier and its compensation network is: AOs = AVO∙ 1+s∙RC∙CC s2∙RO∙CO∙RC∙CC+s∙ RO∙CC+RO∙CO+RC∙CC +1 (17) where: AVO=Gm∙RO (18) The poles of this transfer function are (if CC >> CO): L6983 Error amplifier compensation network DS13116 - Rev 1 page 27/63 |
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