DRV10983-Q1 Datasheet, PDF (39/72 Pages) Texas Instruments – Automotive, Three-Phase, Sensorless BLDC Motor Driver

www.ti.com
DRV10983-Q1
SLVSD14 – JUNE 2017
Motor phase
driving voltage
FGCycle = 0000
2 pole
FGCycle = 0001
4 pole
FGCycle = 0010
6 pole
FGCycle = 0011
8 pole
Figure 39. FG Frequency Divider
8.4.11.2 FG Open Loop and Lock Behavior
Note that the FG output reflects the driving state of the motor. During normal closed-loop behavior, the driving
state and the actual state of the motor are synchronized. During open-loop acceleration, however, this may not
reflect the actual motor speed. During a locked-motor condition, the FG output is driven high.
The DRV10983-Q1 device provides three options for controlling the FG output during open loop, as shown in
Figure 40. The selection of these options is determined by the FGOLSel[1:0] setting.
• Option0: Open-loop, FG output based on driving frequency
• Option1: Open-loop, no FG output (keep high)
• Option2: FG output based on driving frequency at the first power-on startup, and no FG output (keep high) for
any subsequent restarts
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: DRV10983-Q1
Submit Documentation Feedback
39