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DRV10975ZPWPR Datasheet(PDF) 41 Page - Texas Instruments

Part # DRV10975ZPWPR
Description  DRV10975 12-V, Three-Phase, Sensorless BLDC Motor Driver
PDF  66 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

DRV10975ZPWPR Datasheet(HTML) 41 Page - Texas Instruments

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PWM in
Analog
I
2C
PWM_DCO
AVS,
Acceleration Current Limit
Closed Loop Accelerate
PWM duty
ADC
Speed
Command
SpeedCmd
spdCmdBuffer
41
DRV10975, DRV10975Z
www.ti.com
SLVSCP2F – JANUARY 2015 – REVISED JUNE 2020
Product Folder Links: DRV10975
Submit Documentation Feedback
Copyright © 2015–2020, Texas Instruments Incorporated
8.4.11.8 Speed Command Buffer Readback
If acceleration current limit and AVS are enabled, the PWM duty cycle output (read back at spdCmdBuffer) may
not always match the input command (read back at SpeedCmd) shown in Figure 38. See AVS Function and
Current Limit.
By reading the value of spdCmdBuffer, the user can observe buffered speed command (output PWM duty cycle)
to the motor.
Equation 14 shows how the buffered speed is calculated.
DutyOUTPUT (%) = spdCmdBuffer × 100% / 255
where
•
DutyOUTPUT = The maximum duty cycle of the output PWM, which represents the output amplitude in
percentage.
•
spdCmdBuffer = Register value
(14)
Figure 38. SpeedCmd and spdCmdBuffer Register
8.4.11.9 Fault Diagnostics
See Lock Detect and Fault Handling.



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