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L9779WD-SPI Datasheet(PDF) 72 Page - STMicroelectronics

Part # L9779WD-SPI
Description  Smart reset function
PDF  141 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9779WD-SPI Datasheet(HTML) 72 Page - STMicroelectronics

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L9779WD-SPI
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DocID027721 Rev 2
The Faults "DETECTION_RUNNING" & " OPEN LOAD" are latched during the during rise &
fall edge of low-side driver command, if the fault disappeared during these phases the fault
condition is no latched:
–
The FAULT DETECTION RUNNING is no latched, the fault comes back to 0 if the
current becomes higher than open load threshold, before the switch off of low-side
driver.
–
The FAULT OPEN LAOD is no latched, the fault comes back to 0 if the current
becomes higher than open load threshold, before the switch off of low-side driver.
A diagnostic read will clear the “fault detection running” flag. Anyway the diagnostic will
restart.
Figure 48. Stepper motor driver “off” diagnosis time diagram



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