Other Parts Discussed in Thread: DRV8350, DRV5021, MSP430F5529, DRV835X
I have referenced the DRV8350 EVM and have a new design , now it indicated my HALL SENSOR error. I have used the oscilloscope and measured the Connection end of Hall sensor and PCB board.It just like the picture below.HALL A high level is 10mv，low level is almost 0v, HALL B high level is 120mv, low level is 20 mv， HALL C is same with HALL B.
It indicated that HALL A not worked well. So I have changed the HALL A and HALL B , but it stil indicated that the signal on the end of the hall A connection is wrong. So the motor hall fault was eliminated, and it was determined that it should be PCB problem.
The below picture is my PCB design.
But HALL B and HALL C connection are same like that ,Why HALL A was error? what's the problem?