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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AN4355 Fiches technique(PDF) 20 Page - STMicroelectronics |
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AN4355 Fiches technique(HTML) 20 Page - STMicroelectronics |
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20 / 25 page  Protections AN4355 20/25 DocID025240 Rev 2 5.4 VS undervoltage The device also provides an undervoltage detection feature for the power stage supply (VS) through the integrated ADC. Connecting the ADCIN pin to VS through a voltage divider the motor supply voltage is constantly monitored. When the ADC input voltage falls below 1.16 V (typical), the protection is triggered and the UVLO_ADC failure flag is asserted. The failure flag can be released through a GetStatus command after the ADC input voltage returns above the threshold value. The protection does not affect the device operation. If the voltage divider is sized in order to obtain VREG/2 voltage at the ADCIN pin when VS is at its nominal, the VS undervoltage threshold corresponds to a reduction of the 30% of the nominal supply voltage. |
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