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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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A6986I датащи(PDF) 27 Page - STMicroelectronics |
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A6986I датащи(HTML) 27 Page - STMicroelectronics |
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27 / 62 page  6.5 Compensation network design The maximum bandwidth of the system can be designed up to fSW/6, up to 150 kHz maximum to guarantee a valid small signal model RC= 2∙π∙BW∙COUT∙VOUT 0.85V∙gCS∙gm_typ (20) where: fPOLE= ωP2∙π (21) ωP is defined by eq. (9) , gCS represents the current sense transconductance (see Section 3 ) and gm TYP the error amplifier transconductance. CC= 52∙π∙RC∙BW (22) Example 1: VIN = 12 V, VOUT_pri = 5.3 V, ROUT_pri = 5.6 Ω (corresponding to almost 1 A load). Selecting the A6986I with VOUT_pri = 5.3 V, fSW = 500 kHz, Lpri = 18 µH, COUT_pri = 10 µF and ESR = 3 mΩ, RC = 56 kΩ, CC = 680 pF, CP = 4.7 pF (please refer to Table 11), the gain and phase bode diagrams are plotted respectively in Figure 29 and Figure 30. Bode plot (phase). Figure 29. Bode plote (magnitude) A6986I Compensation network design DS13481 - Rev 2 page 27/62 |
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