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AN4355 bảng dữ liệu(PDF) 20 Page - STMicroelectronics

tên linh kiện AN4355
Giải thích chi tiết về linh kiện  The L6480 and L6482 devices are motor controllers providing
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AN4355 bảng dữ liệu(HTML) 20 Page - STMicroelectronics

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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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