Other Parts Discussed in Thread: DRV10970,
Hi Everyone,
Initially, I was able to get the DRV10970 EVM to spin a brushless motor. Unfortunately, it no longer drives the motor and no longer illuminates the locked rotor LED.
I'm using a small brushless motor with 3 Hall IC's. I soldered 2.2kohm resistors on R17-R19 as pull-up resistors and placed jumpers on J5, J7, and J8.
I can see that the PWM is working from the potentiometer/555 timer, but the UVW phase outputs are measuring ~70mV regardless of the potentiometer position. Other voltages such as VINT and HPWR are correct. I've tried a few different motors and I've also tried every combination of hall/phase wiring to rule that out.
Is the PCB broken? Any info or tips are greatly appreciated.
Thanks,
Tim