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DRV8312: Equivalency to DRV8332

Julie Silvers
Prodigy 30 points
Part Number: DRV8312
Other Parts Discussed in Thread: DRV8332, , DRV8313, DRV8376

Tool/software:

Hello, 

I am wondering if there are any key internal differences between the DRV8312 and DRV8332? I understand the packaging is different and therefore the power/thermal ratings are different, but is all other internal circuitry equivalent? I am particularly interested in if the internal FET drivers are equivalent? I am looking to apply radiation data collected on DRV8332 to DRV8312. 

Thank you!

  • 0
    TI__Expert 4395 points

    Hi Julie,

    To answer your question, the difference between the parts will be the packages, specifically the presence of the thermal pad versus the heat slug. 

    As for internal operation, and MOSFET power stage, they should be the same.

    However, I am wondering, why have you chosen these parts to collect data on? What is the end application for these drivers? 

    The reason why I ask is because these are some of the oldest BLDC motor drivers that we have, and we have much more modern and effective parts which you will likely find easier to use, and more effective.

    Thank you,

    Joseph

  • 0 in reply to Joseph Ferri
    Prodigy 30 points

    We are currently using the DRV8313 in our products, but have determined the radiation performance is below our specifications. So I am looking for an alternative to this driver, which will meet >46V and >2A. I have some evidence that the radiation performance of the DRV8332 is superior to that of the DRV8313, but this is obsolete, which led me to the DRV8312. What would you recommend in it's place? 

  • 0 in reply to Julie Silvers
    TI__Expert 4395 points

    Hi Julie,

    Thanks for the extra information. We do have a newer part which I can recommend, DRV8376. (Supports 48V systems, integrated MOSFET, which seems to be your requirements)

    https://www.ti.com/product/DRV8376

    Has there been PCB reworking in order to minimize emissions on your board as well? Based on my experience with EMI testing, I would assume the culprit to be related to the switching speed/slew rate/transients/pcb parameters, rather than the DRV device itself. 

    Thank you,

    Joseph