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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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L6738A Arkusz danych(PDF) 23 Page - STMicroelectronics |
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L6738A Arkusz danych(HTML) 23 Page - STMicroelectronics |
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23 / 32 page  L6738A Application details Doc ID 18134 Rev 2 23/32 Figure 10. Example of type III compensation. ● Open loop converter singularities: a) b) ● Compensation Network singularities frequencies: a) b) c) d) To place the poles and zeros of the compensation network, the following suggestions may be followed: Gain [dB] Log (Freq) 0dB open loop EA gain closed loop gain compensation gain open loop converter gain F LC F ESR F Z1 FZ2 F P1 F P2 20log (R F/RFB) 20log (V IN/∆VOSC) F 0dB F LC 1 2 π LC OUT ⋅ ------------------------------------- = F ESR 1 2 π C OUT ESR ⋅⋅ ------------------------------------------------- = F Z1 1 2 π R F C F ⋅⋅ ------------------------------------ = F Z2 1 2 π R FB R S + () C S ⋅⋅ ---------------------------------------------------------- = F P1 1 2 π R F C F C P ⋅ C F C P + ---------------------- ⎝⎠ ⎛⎞ ⋅⋅ -------------------------------------------------------- = F P2 1 2 π R S C S ⋅⋅ ------------------------------------ = |
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