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Original question:

DRV8955: DRV8955 Options

DRV8955: Difference Between Packages and Output Paralleling

Sam Selyutin
Prodigy 120 points
Part Number: DRV8955

Tool/software:

Hello,

While working on my design using the DRV8955, I noticed that the package for PWP and RGE differ slightly.

It seems that the PWP has two pins per output. I was just wondering why that was.

And to follow up - when using the MODE pin to adjust between the amount of solenoids being driven, are the pins paralleled internally or am I required to short them external to the chip? I would like to test multiple configurations and do not want to short it externally if I do not have to in order to reduce the amount of PCB revisions I do.

Regarding the H-bridge configuration, would I just be connecting the load between two OUTx pins?

Thanks in advance.

  • +1
    TI__Mastermind 42505 points

    Hi Sam,

    Sam Selyutin said:
    It seems that the PWP has two pins per output. I was just wondering why that was.

    This is because PWP package has 28-pins vs. 24-pins for the VQFN package, we took advantage of the extra 4 pins. The VQFN would have two bond wires internally. There's no trade off with drive capability. However the PWM has lower thermal resistance so offers better power dissipation. 

    Sam Selyutin said:
    And to follow up - when using the MODE pin to adjust between the amount of solenoids being driven, are the pins paralleled internally or am I required to short them external to the chip?

    You have to short them externally. See below table from the datasheet.

    Sam Selyutin said:
    Regarding the H-bridge configuration, would I just be connecting the load between two OUTx pins?

    Yes, this is correct. 

    Regards, Murugavel 

  • 0 in reply to Murugavel4637
    Prodigy 120 points

    Thank you very much!