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BQ51050B: Charge Complete Status

Joshua Reiderman
Prodigy 10 points
Part Number: BQ51050B

I would like to be able to tell when the BQ51050B has fully charged a battery and is still connected to the transmitter.  I have the ~CHG pin pulled to the RECT pin currently.  The ~CHG pin pulls low, as expected, when charging.  Once the battery is fully charged the pin only pulls low for a moment when the digital pin is received from the transmitter.  The transmitter only pings once every 5s when fully charged.  Is there anyway to get the status faster than every 5s?

  • +1
    TI__Guru* 75656 points

    Hello 

    This will depend a great deal on what the transmitter (TX) does when it receives charge complete.  The TX will power down but when it checks back with the RX will vary between manufactures.

    Unit still on the charger, it may be possible to use RECT voltage if the TX is sending low power ping it will show up there.