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BQ25606: BQ25606 - Very Low Charge Current

Gustavo Belbruno
Prodigy 45 points
Part Number: BQ25606

Hi. I have carefully followed the schematic of the component, and I am almost sure that I have assembled the circuit correctly (if necessary I will give more details).
However, I can't get my charging current to exceed 420mA and I've reached 500mA in a few moments. (Although I have already touched up Rilim and Rchg several times).
I think maybe it could be component failure. I'm using electrolytic capacitors. Could this be it?
Can it be a bad battery? Although personally I do not think that is the problem.

Has it happened to someone?
Thank you so much!

  • 0
    TI__Guru 57651 points

    Hi,

    Please visit https://e2e.ti.com/support/power-management/f/196/t/890626 for BQ25606: Schematic Review and PCB Layout Design Tips.

    Additional Information including FAQs is available http://www.ti.com/lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606.

    Please check if STAT pin indicate any faults and debug from there. STAT pin blinks when Charge suspend (input overvoltage, TS fault, timer fault or system overvoltage).

    Please also note that when the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement Mode prevents overloading the input source. Please check if the input current limit or voltage limit (refer to 8.3.2.4 Input Voltage Limit Threshold Setting (VINDPM Threshold)) is reached.

    Thanks,

    Ning.