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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST1S50 датащи(PDF) 11 Page - STMicroelectronics |
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ST1S50 датащи(HTML) 11 Page - STMicroelectronics |
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11 / 29 page  DocID025723 Rev 4 11/29 ST1S50 Functional description 29 Equation 3 where: Equation 4 Sn represents the ON time slope of the sensed inductor current, Se the slope of the external ramp (VPP peak-to-peak amplitude) that implements the slope compensation to avoid subharmonic oscillations at a duty cycle over 50%. The sampling effect contribution FH(s) is: Equation 5 where: Equation 6 and Equation 7 The resistor to adjust the output voltage gives the term from the output voltage to the FB pin. GDIV(s) is: p 1 RLOAD COUT -------------------------------------- mC 1D – 0.5 – LCOUT fSW --------------------------------------------- + = mC 1 Se Sn ------ + = Se Vpp fSW = Sn VIN VOUT – L ------------------------------ Ri = FH s 1 1 s n QP ------------------- s 2 n 2 ------ ++ ------------------------------------------- = QP 1 m C 1D – 0.5 – ---------------------------------------------------------- = n f SW = GDIV s R2 R1 R2 + -------------------- = |
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