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Tool/software:
With DRV10964, there is a question about the function of config pin, that is, the switch between open loop and closed loop. If the threshold is set high and the target speed is lower than the threshold, is the loop always open? Or do you charge to the set threshold and then lower to the target speed?
1. If the speed corresponding to the threshold is set to 3000rpm, and the target speed is 1500rpm, please increase it to 3000rpm and then return to 1500rpm.
2. Can the CONFIG pin be grounded directly? If the direct ground is open loop control?
Hi,
Open loop is always up to open loop to closed loop threshold which is CONFIG level.
1. Target speed can be lesser than the open loop to closed loop hand off threshold, motor will be driver to the hand off point, measures KT and then switches to the closed loop where duty is adjusted to reach target speed. Note that you have to make judgment while setting the hand off point. The hand off point is where device can get meaningful BEMF from the motor.
2. If grounded hand off value is as per the table shown in the data sheet.
Thanks and Best Regards
Venkatadri S
