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DRV8320: How to setup driver parameters

Michele Mocellin
Prodigy 90 points
Part Number: DRV8320
Other Parts Discussed in Thread: DRV10987, , DRV8316, DRV8316REVM, LAUNCHXL-F280049C,

Hello everybody,

Some years ago I develepoed a 3 phases controller for water pumps based on DRV10987 by using "DRV10987 Tuning guide".

Now I have to develop a new controller for diffferent pumps with peak current up to 6A and I wolud like to use DRV8320.

Do you think is the right one for my application (Radial water pumps) ?

Another question, there is a step by step guide to setting the varius parameters (like DRV10987 Tuning guide) ? The motors already exist and I would like to develop the controller around them.

Hope I have been clear enough
Thank you for your help.

  • 0
    TI__Mastermind 26046 points

    Hello Michele,

    Thanks for posting to the MD forum!

    A good BLDC motor driver to migrate to is the DRV8316. This is an integrated FET BLDC driver up to 8-A peak current and 40-V max (95mohm RDSON), integrated buck regulator (up to 600-mA), 3.3V LDO output (up to 30-mA). This comes in a SPI interface (DRV8316R) or hardware interface (DRV8316T) to configure settings. 

    You can begin evaluation with the DRV8316REVM (currently in stock), and we even include a sensorless-FOC commutation algorithm using the LAUNCHXL-F280049C MCU and a GUI. This device uses external control from an MCU, where you can use 6x or 3x PWMs to control the motor, so no tuning guide would be required. 

    Thanks,
    Aaron

  • 0 in reply to Aaron Barrera
    Prodigy 90 points

    Hello Aaron,

    thank you for suggestion, but I didn't explain it well in my application the pump consumptions in continuos operation is around 6A. So I readed on DRV8316 datasheet it works up to 3A in continuos conditions.
    I think DRV8316 is not a good choise for my project.

  • 0 in reply to Michele Mocellin
    TI__Mastermind 26046 points

    Hi Michele,

    If you are referring to Table 9-1, this is just an example application using 3-A RMS current. From an RMS perspective, I'd expect the device to be able to 8 / sqrt(2) = 5.66A RMS current, so if you need 6-A RMS, then you may need to use a gate driver device like the DRV8320.

    May I ask if you would like to drive the pump using sinusoidal or sensorless FOC control, since you are migrating from the DRV10987? We do support InstaSPIN-FOC solutions using the LAUNCHXL-F280049C and BOOSTXL-DRV8320RS or DRV8316REVM. 

    Thanks,
    Aaron

  • 0 in reply to Aaron Barrera
    Prodigy 90 points

    Ok, 

    After your explanation about RMS current of DRV8316, I think I'll try also DRV8316.

    I have another two question: 

    - When DRV8316 will be avilable for production?

    - I have a BOSTXL-DRV8320S, is it compatible with LAUNCHXL-F280049C and InstaSPIN-FOC or I need the "RS" version.

  • +1 in reply to Michele Mocellin
    TI__Mastermind 26046 points

    Hi Michele,

    DRV8316 samples and EVM is available now and will be released to market end of July. 

    DRV8316: https://www.ti.com/product/DRV8316

    DRV8316REVM: https://www.ti.com/tool/DRV8316REVM

    You will specifically need the BOOSTXL-DRV8320RS to use with LAUNCHXL-F280049C for InstaSPIN-FOC. You can also evaluate the InstaSPIN-FOC with DRV8316.

    Thanks,
    Aaron