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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HVLED007 датащи(PDF) 12 Page - STMicroelectronics |
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HVLED007 датащи(HTML) 12 Page - STMicroelectronics |
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12 / 33 page  Application information HVLED007 12/33 DS12866 Rev 1 Equation 4 Solving (Equation 4) for VCt (θ): Equation 5 Figure 6. Key waveforms of the ICS circuit in figure 5 VCt (θ) is connected to the (-) input of the PWM comparator through the low-pass filter Rf Cf, whose purpose is to remove unwanted high frequency noise. The associated time constant (≈ 100 ns) is such that the voltage across Cf is not significantly different from that across Ct, so that VCt (θ) is actually the reference Vcsref (θ) for the current loop. If we substitute the expression (Equation 3) of IMULT into (Equation 5) we find: Equation 6 that has exactly the desired form (Equation 2) with: Equation 7 I MULT T = V Ct Rt --------------------TON VCt = I MULT R t T T ON ------------------- Vcsref IMULT T Vcsref Vcsref Vcs t Vcsref = V Ct = [K p Vinpk sin V c] kI Rt T T ON ------------------- Vcsx = Kp Vinpk V c k I Rt |
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