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DRV8302: Advice on grading motor drivers

Nir Givon
Intellectual 345 points
Part Number: DRV8302
Other Parts Discussed in Thread: DRV8323R, DRV832X, DRV8320, DRV8323

Hi,

We have a Stabilized camera module, using DRV8302 as the motor drivers.

We are currently upgrading our control card and I am looking at updating the drivers to DRV8323R.

One of my reasons is that DRV8323R has 3 current amplifiers onboard witch saves me from an external amplifier.

I would like you advice if the DRV8323R is a good choice of you have other drivers witch you recommend.

Also, that's you opinion of the two versions of the device, the hardware configurable vs the SPI configurable.

Thanks!

  • 0
    TI__Mastermind 18900 points

    Hello Nir,

    Yes, the DRV832x is the preferred upgrade from the DRV8302.

    DRV8320 vs. DRV8323:

    As discussed in the datasheet, the DRV8323 contains the 3 current sense amplifiers (CSA) and the DRV8320 is the same device but without the CSAs. I only mention this to let you know that you have options to continue using the external CSAs.

    DRV8323S vs. DRV8323H:

    This is SPI vs. Hardware. I will always recommend the SPI device. This is because the SPI device allows for a greater number of options for settings and more precise information about faults or other statuses that the device already. This comes at the cost of developing firmware for whatever MCU or processor that you are using, but the improved flexibility.

    Otherwise, the HW device allows the user to set all the primary functions using external resistors. Again, this is at the cost of less options and less precise information about the statuses and faults (e.g.. nFAULT pin only instead of all of the fault registers plus the nFAULT pin)

    DRV8302 vs. DRV8323:

    You already pointed out the big difference which is the inclusion of the CSAs. In addition, the DRV8323 is a much newer part which means you'll find a lot more information about everything as older parts usually have more vague datasheets and specifications. You'll see more protection features and the addition of 1x PWM mode (which might not be applicable to you) which allows for simple trapezoidal commutation built into the device. Other than that, there's more intelligence in the DRV8323 with programmable slew rate or rise and fall time control with the addition of smart gate drive architecture, see the datasheet for a high level view and see this app note for more technical info https://www.ti.com/lit/an/slva714c/slva714c.pdf 

    Best,

    -Cole

  • 0 in reply to Cole Macias
    Intellectual 345 points

    Thanks a lot for the detailed response!