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TPIC2060A: Speed and phase control of the spindle output

Jackson Thomas
Genius 14415 points
Part Number: TPIC2060A

Hello,

I am working on finding a high current (~3amps) 3 phase motor drive chip that can achieve speed and phase lock control from 90Hz through 240Hz.  We need to be able to update the spindle DAC at least every 4 milliseconds or every revolution to adjust for speed and phase error within ~5us of each revolution.  I have achieved this with other 12V drivers with a 12 bit DAC, but I am wondering if this chip would be fast enough in response time.

Would this, or any of the other TPIC20xx support this type of functionality?

Thanks for the help!

  • 0
    TI__Guru** 114905 points
    Hi Jackson,

    Our experts have been notified and should reply soon.
  • 0
    TI__Genius 14487 points
    Hello Jackson,

    My quick back-of-the-envelope calculation says that you should be able to update the DAC registers as fast as every 500 ns = (16bits+1 clock cycle pause)/35 MHz. I think you can meet your DAC update requirement.

    As for your current requirement, the TPIC2060A is rated for an average output current of 1.7 A. It can supply a 3.0 A peak current, but should not be running at 3.0 A the whole time.

    As for developing a speed and phase locking control system, the power of the motor, the supply current of the driver, and the size of the mechanical load will greatly affect fast you can adjust the speed for your control system in addition to how fast the DAC registers can be updated.