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DRV8350: About absolute maximum rating voltage of DRV8350.

sakamotosh
Prodigy 10 points
Part Number: DRV8350
Other Parts Discussed in Thread: DRV8320,

We are comparing data(absolute maximum rating) of DRV8320 and DRV8350.

We have three question. 

①Could you tell me why is absolute maximum rating of GHx pin voltage (Vvcp＋0.3V) lower than the same as DRV8320(Vvcp＋0.5V)?

②Could you tell me why is absolute maximum rating of GHx pin voltage with respect to SHx (16V) higher than the same as DRV8320(13.5V)?

③ Let me know transiently (ex. under 50ns) absolute maximum rating of GHx pin voltage with respect to SHx ?

DRV8350.pptx

  • 0
    Genius 5040 points
    sakamotosh said:
    ①Could you tell me why is absolute maximum rating of GHx pin voltage (Vvcp＋0.3V) lower than the same as DRV8320(Vvcp＋0.5V)?

    8350 has VCP=16v compared to 8320 VCP=13.5v; how can you say 8350 is lower than 8320?

    sakamotosh said:
    Could you tell me why is absolute maximum rating of GHx pin voltage with respect to SHx (16V) higher than the same as DRV8320(13.5V)?

    Because the designer wanted to have 16v for 8350, and 13.5v for 8320. Just like saying why this FET rated at 60A and the other FET is rated only at 10A????

    Why do you care? Are you concerned the GHx is not enough to turn on the FET at 13.5v or 16v VGS?

    Brian

  • 0
    TI__Genius 12345 points

    Hello Sakamotosh,

     

    I would recommend looking at this E2E post: LINK

    It gives a good explanation of the specifications you asked about.

     

    After looking at the post if you still have questions I would be happy to continue supporting you!

     

    Thank you,

    Joshua

  • 0 in reply to Brian Dang
    Prodigy 10 points

    Hi Brian

    Thank you for providing an answer to my question. 

    ①Could you tell me why is absolute maximum rating of GHx pin voltage (Vvcp＋0.3V) lower than the same as DRV8320(Vvcp＋0.5V)?

    8350 has VCP=16v compared to 8320 VCP=13.5v; how can you say 8350 is lower than 8320?

    →Does this Vvcp mean absolute maximum rating of Vvcp pin voltage  instead of real voltage?

     

    ②Could you tell me why is absolute maximum rating of GHx pin voltage with respect to SHx (16V) higher than the same as DRV8320(13.5V)?

    Because the designer wanted to have 16v for 8350, and 13.5v for 8320. Just like saying why this FET rated at 60A and the other FET is rated only at 10A????

    Why do you care? Are you concerned the GHx is not enough to turn on the FET at 13.5v or 16v VGS?

    →Thank you for your reply. I have understood that the difference depend on design.

  • 0 in reply to Joshua Horlander Cruz
    Prodigy 10 points

    Hi Joshua

    Thank you for providing an answer to my question. 

    I will check the LINK.

    I’ll let you know if something comes up.

  • 0 in reply to sakamotosh
    TI__Mastermind 19885 points

    Hello Sakamotosh,

    Sounds good, glad Joshua was able to help!

    Regards,

    Anthony 

  • 0 in reply to sakamotosh
    TI__Mastermind 18916 points

    Hi Sakamotosh, 

    Do you still require further assistance here? 

    Please mark the thread resolved if we can close this thread - or let us know what lingering actions are remaining. Thanks! 

    Best Regards, 
    Andrew