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Original question:

BQ25185: Wake up from factory mode and charge enable

BQ25185: Battery Charging circuit

Firas Bannour
Prodigy 50 points
Part Number: BQ25185

Tool/software:

Hello, I need to confirm that my design for charging a 3.7V battery is correct. My question is: since I’m not using the TS option, is it correct to tie the TS pin to ground with a 10k resistor?

  • 0
    Prodigy 50 points

    Stil waiting for a reply it's urgent please

  • 0 in reply to Firas Bannour
    TI__Expert 7920 points

    Hello Firas,

    Yes, if the TS function is not being used, the TS/MR pin should be tied to ground with a 10k.

    Best regards,

    Alec Lehman

  • 0 in reply to Alec Lehman
    Prodigy 50 points

    "Thanks for replying. My last question: Is my usage of STAT1 and STAT2 correct, since there is no example provided in the datasheet? If you notice anything that could prevent the battery from charging when VIN has a 4.7V input, please let me know.

  • +1 in reply to Firas Bannour
    TI__Expert 7920 points

    Hello Firas,

    STAT1 and STAT2 are open drain status outputs which can be connected to either an LED or an I/O pin of an MCU to inform the user or host about the charger status. If these pins are not required in your design, they can be left floating.

    You can refer to the BQ25185 EVM schematic, which can be found in the EVM User's Guide: BQ25185 EVM User's Guide

    From your schematic, it appears that D6 and D7 are not LEDs. If you intend to use LEDs, ensure you select appropriate current-limiting resistors.

    Lastly, since you are using a 5k on the ILIM/VSET pin, VBATREG will be set to 3.65V. This means your battery will not charge up to 3.7V, so please ensure this aligns with your requirements.

    Best regards,

    Alec Lehman