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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6713ATR датащи(PDF) 33 Page - STMicroelectronics |
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L6713ATR датащи(HTML) 33 Page - STMicroelectronics |
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33 / 64 page  L6713A Current reading and current sharing loop 33/64 The Rg trans-conductance resistor has to be selected using the following formula, in order to guarantee the correct functionality of internal current reading circuitry: Current sharing control loop reported in Figure 9: it considers a current IINFOx proportional to the current delivered by each phase and the average current . The error between the read current IINFOx and the reference IAVG is then converted into a voltage that with a proper gain is used to adjust the duty cycle whose dominant value is set by the voltage error amplifier in order to equalize the current carried by each phase. Details about connections are shown in Figure 8. Figure 9. Current sharing loop Rg DCR MAX () 20 μA -------------------------------- I OUT MAX () N ------------------------------- ⋅ = AVG ΣI INFOx N ⁄ = I INFO1 PWM1 Out From EA I INFO2 I AVG PWM2 Out I INFO3 PWM3 Out AVG (PHASE2 Only when using 3-PHASE Operation) |
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