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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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A6984 Arkusz danych(PDF) 21 Page - STMicroelectronics |
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A6984 Arkusz danych(HTML) 21 Page - STMicroelectronics |
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21 / 47 page  DocID030396 Rev 1 21/47 A6984 Device description 47 Figure 14. Virtual ESR network The CDC capacitor decouples the feedback DC path through the RCOT so the output voltage is adjusted accordingly with Section 4.1 on page 13. Basically the network RCOT, CCOT generates a voltage signal proportional to the inductor current ripple and superimposed with the real partitioned output voltage that increases the SNR at the input of the PWM comparator. As a consequence the PWM converter commutation is clean, removing the duty cycle dithering. For the purpose of the signal generated by the RCOT and CCOT the output capacitor represents a virtual ground so the equivalent small signal circuit of the output of the virtual ESR network is shown in Figure 15. Figure 15. Virtual ESR equivalent circuit |
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