• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 266 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

BQ25100: CHG pin operation

K. Sasaki14
Guru 10200 points
Part Number: BQ25100
Other Parts Discussed in Thread: BQ24040,

During TTDM, CHG pin is high impedance.

After that, does CHG pin become low when battery is detected and charge cycle begins?

And also, does CHG pin become low when re-charge begins if OUT pin voltage drops to VRCH?

Best Regards,
Kohei Sasaki

  • 0
    TI__Guru 69186 points
    Hello
    Take a look at FAQ regarding CHG pin for BQ24040 the BQ25100 is very similar:
    e2e.ti.com/support/power-management/f/196/t/753020
  • 0 in reply to Bill Johns
    Guru 10200 points

    Bill-san,

    Thank you for your reply.

    I understood that CHG pin becomes low when charge cycle begins after battery is detected and existing TTDM.
    Is this correct?

    And I want ask about recharge,
    I saw the following comment on your attached URL.
    In this comment, there is "CHG pin remain low after termination even if the recharge has started". Is "remain low" correct? I thought "remain high-impedance" may be correct from sentence.

    2.)     The BQ2404X will automatically restart charge if after termination/charge complete the battery voltage drops to Recharge (V-RCH). This is done to maintain the battery fully charged. In this case the /CHG pin will remain low after termination even if the recharge has started.

    Best Regards,
    Kohei Sasaki

  • 0 in reply to K. Sasaki14
    TI__Guru 69186 points
    Thanks for pointing out the error in section 2 it has been corrected.