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BQ25756EVM: Reference Design Files

Brent Singer1
Prodigy 70 points
Part Number: BQ25756EVM
Other Parts Discussed in Thread: BQ25756

Hi TI FAE team,

About to start a design on the BQ25756, a few questions:

- Can I get a link to some Altium design files for the EVM ref board? This would be an excellent help. 

- Part is 'Active' but very new; are we on final silicon, final MP on the part? Expect errata?

- Are TI you planning to make a 16S version of the same?

- Are TI planning a higher input voltage version? I could use more input voltage.

- Any reason the lifetime of the part might be shorter?

Thanks, Brent.

  • +1
    TI__Mastermind 30705 points

    Hello Brent,

    Thanks for working with this part. I'm the applications engineer for the BQ25756.

    Brent Singer1 said:
    - Can I get a link to some Altium design files for the EVM ref board?

    Here are those files:BQ25756 EVM Layout.zip

    Brent Singer1 said:

    Part is 'Active' but very new; are we on final silicon, final MP on the part? Expect errata?

    We are currently on the final silicon.

    Brent Singer1 said:
    Are TI you planning to make a 16S version of the same?

    The BQ25756 EVM can be adjusted to a 16S version by adjusting the feedback resistor R64.

    Brent Singer1 said:
    Are TI planning a higher input voltage version? I could use more input voltage

    How high of a voltage do you need? The BQ25756 can be adjusted a higher voltage by adjusting the ACUV/ACUV voltage divider network. You can also remove R27 on the EVM to disable the input protection completely.

    Brent Singer1 said:

    Any reason the lifetime of the part might be shorter?

    Can you explain what you mean by this? We won't end support for this part.

    Let me know if you have any other questions

    Best Regards,
    Ethan Galloway

  • 0 in reply to Ethan Galloway
    Prodigy 70 points

    That hit the spot. Thanks.

    Are TI planning a higher input voltage version? I could use more input voltage

    How high of a voltage do you need? The BQ25756 can be adjusted a higher voltage by adjusting the ACUV/ACUV voltage divider network. You can also remove R27 on the EVM to disable the input protection completely.

    >> It's for a marine application where the bus can see up to 100V (or a bit of lightning occasionally.) So extra ABSMAX is always helpful, allowing more headroom when protecting the circuit. Often a broken Solar input (MPPT or similar black box) can put a solar panel string voltage direly on the bus causing fun. 
    Brent Singer1 said:

    Any reason the lifetime of the part might be shorter?

    Can you explain what you mean by this? We won't end support for this part.

    Some vendors just have 'long life time' families, and then they have families that are lead customer oriented, so when that product is eol, the part supply goes into lifecycle management and eol soon after. I know that TI are really good for long term supply, but just thought I'd ask in case the bq parts are going down a different route - i.e lifecycles around more consumer product cycles.

  • 0 in reply to Brent Singer1
    TI__Mastermind 30705 points

    Hello Brent,

    You are welcome.

    Thanks for clarifying your question about the part lifetime. The IC will continue being produced for a long time.

    Please let me know if you have any other questions

    Best Regards,
    Ethan Galloway