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Original question:

BQ51050B: wireless charging Receiver circuit

BQ51050B: BQ51050B

cb narayana
Prodigy 20 points
Part Number: BQ51050B

Hi 

EPT is not happening at transmittor even after the battery is charged upto 4.18 V without any load to the battery 

Please let us know if there is any way we could  add an LED indicator for completion of charge at receiver end

  • 0
    Prodigy 20 points

    Please find the Vrect oscilloscope video attached here for your reference. There is high level of noise in the signal compared to reference graph provided by you

  • 0 in reply to cb narayana
    TI__Guru 67846 points

    Hello

    The BQ51050B will compare the voltage at ILIM pin with voltage at TERM pin to set charge complete.  ILIM represents the output current, sample of current at output.  TERM is a fixed voltage set by the resistor on TERM.  When ILIM is lower the charge is complete and unit will send EPT.

    The CHG pin can drive an LED and indicate when charge is in progress.