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BQ25751: Direct Power Path vs Non-Direct Power Path Applications

Fred Harmon
Prodigy 10 points
Part Number: BQ25751

Tool/software:

Hello TI, I was curious if there are any plans for a non-direct power path chip for lead acid batteries or can the BQ25751 chip be used for non-direct power path applications?  For our initial application, we intend to have a solar panel that is at approx. 22 volts charging one lead acid battery at 12 V and operating a load at about 12 V.  If the BQ25751 chip can be used for non-direct power path applications, is there a "typical" circuit that we could reference.  Thank you for your assistance, Fred 

  • 0
    TI__Mastermind 32771 points

    Hello Fred,

    Yes, the BQ25751 chip can also be used for non-power path applications. I'm working on a schematic checklist to include a typical design for a non power path version of BQ25751. In the mean time I did a quick sketch of what it should look like: The BATFETs should be removed, SYS should be tied to VAC, BATDRV should be left floating, and BATSRC should be tied to input of the battery.

    Best Regards,

    Christian.

  • 0 in reply to Christian Moyer
    Prodigy 10 points

    Hello Christian, thank you for the quick response.  We will take a look at your sketch as a good starting point for our design.  We will also be looking forward to seeing the schematic checklist for a typical design.  Thank you, Fred