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DRV8461SPWPR 数据表(PDF) 63 Page - Texas Instruments

部件名 DRV8461SPWPR
功能描述  DRV8461: 65 V, 3 A Stepper Motor Driver for High Efficiency and Noiseless Operation
PDF  117 Pages
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制造商  TI [Texas Instruments]
网页  http://www.ti.com
标志 TI - Texas Instruments

DRV8461SPWPR 数据表(HTML) 63 Page - Texas Instruments

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Figure 7-44 and Figure 7-45 show open-load detection in cases where coil A and coil B were opened
respectively. The open load detection time was selected to be 60 ms maximum, and the OL_MODE bit was
0b.
Traces from top to bottom: AOUT2, coil A current, coil B current, nFAULT
Figure 7-44. Coil A open-load detection
Traces from top to bottom: AOUT2, coil A current, coil B current, nFAULT
Figure 7-45. Coil B open-load detection
Note
• In silent step decay mode, open-load fault detection works only if the motor is in motion. If the
motor is in standstill, open-load detection is not supported.
• When open-load fault is detected -
– If ENABLE pin is changed from logic HIGH to Hi-Z on-the-fly, apply a nSLEEP reset pulse once
the open-load condition is removed.
– If OL_MODE is changed from 1b to 0b or EN_OL is changed from 1b to 0b, apply a clear faults
command once the open-load condition is removed.
• When the device is operating with auto-torque enabled, if open-load fault is detected, the coil
current goes to a value corresponding to TRQ_DAC.
www.ti.com
DRV8461
SLOSE98 – DECEMBER 2022
Copyright © 2022 Texas Instruments Incorporated
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Product Folder Links: DRV8461



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