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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UM1756 датащи(PDF) 23 Page - STMicroelectronics |
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UM1756 датащи(HTML) 23 Page - STMicroelectronics |
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23 / 49 page  DocID026263 Rev 2 23/49 UM1756 Device configuration 49 Advanced current control (EVAL6482H-DISC) The following configuration gives good results with most of motors: The impacts of the timing parameters are explained in the application note AN4158: “Peak current control with automatic decay adjustment and predictive current control: basics and setup”. 4.3 Overcurrent protection The overcurrent protection monitors the drain-source voltage drop of all the external Power MOSFETs and disables the power stage when the programmed threshold is reached. Warning: The overcurrent protection can be disabled setting the flag “Over-current- shutdown”. However it is not recommended to disable this protection. The stall detection threshold should be just above the operating peak current of the application. During the preliminary stages of evaluation, it can be set to the maximum value. Figure 16. Overcurrent protection Table 7. Voltage mode driving Parameter Value Unit Minimum ON time 4 s Minimum OFF time 21 s Maximum fast decay (TOFF_FAST) 10 s Maximum fast decay at step change (FAST_STEP) 16 s Target switching time 48 s |
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