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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN4350 датащи(PDF) 13 Page - STMicroelectronics |
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AN4350 датащи(HTML) 13 Page - STMicroelectronics |
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13 / 34 page  DocID025181 Rev 1 13/34 AN4350 Circuit description and design guidelines 34 where the previous transfer functions are: Gpwm is the internal PWM modulator gain (Gpwm = 0.5) Gps(s) is the power stage transfer function (transformer and output filter) Gfp is the feedback gain between the VOUT and DMG pin Gsh(s) is the internal sample and hold transfer function Gea(s) is the error amplifier transfer function (COMP pin network) Figure 5. Equivalent small signal voltage control loop schematic The power stage transfer function is calculated considering the transfer function of a standard flyback converter: Equation 23 Equation 24 Equation 25 Gps s Go ps 1 s z1 ps --------------------- + 1 s z2 ps --------------------- – 1 s pps ----------------- + ------------------------------------------------------------------------------ = Go ps 1 2 --- NP NS ------- ROUT RSENSE --------------------- 1dP – 1dP + ---------------- = z1 ps 1 ESR COUT --------------------------------- = |
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