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Original question:

DRV3946-Q1: Complete Datasheet

DRV3946-Q1: Why is this datasheet not publicly available?

Sasha Zbrozek
Prodigy 10 points
Part Number: DRV3946-Q1
Other Parts Discussed in Thread: DRV8262

I'm trying to help some students build a BMS for a solar car and was going parts shopping. The brief makes the part look like a convenient fit for their needs. There does not appear to be anything remarkable about this part, yet the datasheet is being gate-kept like it's full of nuclear launch codes. Why?

  • 0
    TI__Expert 3550 points

    Hi Sasha Zbrozek,

    The details of the device including datasheets and functional safety documents by requesting in the ti.com page for DRV3946-Q1 (https://www.ti.com/product/DRV3946-Q1 )

    Please see the screenshot below

    Thanks,

    Ibinu

  • 0 in reply to Ibinu Alaudeen Nadeera
    Prodigy 10 points

    I want to know why the datasheet isn't public, not how to get it.

  • 0 in reply to Sasha Zbrozek
    TI__Mastermind 22150 points

    Sasha,

    This datasheet goes into much deeper detail about the inner workings of the device than most of our datasheets do.  Much more detailed block diagrams, logic flowcharts, internal calculation block diagrams, etc.  The datasheet is request-only for now to help protect all of this TI confidential information.  

    Fair warning on this device, it has many SPI registers and can be complicated to configure.  For a student project I would recommend picking one of our easier Brushed DC motor drivers with integrated current sensing and regulation that is able to handle the voltage+current requirements of a contactor in your BMS system.  You can manually adjust the current regulation on the fly to achieve the desired control curve for the relay.  Something like DRV8262 is where I would start. 

    Best,

    Jacob

  • 0 in reply to Jacob Thompson
    Prodigy 10 points

    Thanks for the explanation; I really appreciate it. It does seem strange that the flow is labeled export controlled, however. That made me wonder what kind of ITAR-or-similar restrictions might exist on something as mundane as a solenoid driver.

    The DRV8262 looks like a very nice part, albeit way more current than the kids will ever need. Right now the plan is to toggle a buck converter between two setpoints to reduce the coil current. I look forward to the eventual public release of the DRV3946; it seems like a wonderful match to this use case.

    Cheers, and thanks again!

    -Sasha