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BQ25504: Is there a recommended replacement for BQ25504?

Alex Dinovitser1
Prodigy 50 points
Part Number: BQ25504
Other Parts Discussed in Thread: BQ25505,

I just need a really simple single cell BMS with user adjustable V_uv (battery under voltage setting) but the new BQ25505 does not have this. For some reason TI seem to have removed this feature, ad the 2V internal setting is way too low for my battery application.
What is the recommended replacement?

(ps: don't need MPPT and boost, but I don't mind)

Thanks!

  • 0
    TI__Genius 10385 points

    Alex,

    Could you tell me a little bit more about your application to help me select the best part for you?

    What will be your input power source and the voltage and current input you expect? I assume it will some kind energy harvesting device as you were interested in using bq25504.

    What charge current do you want to charge your 1S battery at?

    Will you be having a system load as well and what voltage and current will you be providing?

    Thanks,

    Ricardo

  • 0 in reply to Ricardo
    TI__Guru**** 166996 points

    Alex,

    Can you use the BQ25505 VBAT_OK to determine undervoltage and then use VB_SEC_ON to drive an external PFET to prevent battery discharge?

    Regards,

    Jeff

  • 0 in reply to Jeff F
    TI__Genius 10240 points

    Hi Alex,

    We haven’t heard back from you. We are assuming you were able to resolve your issue. If not, just post a reply below or create a new thread if the thread has locked due to time-out.