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[FAQ] E2E Search Advanced Tips and Tricks

BQ24610: BQ24610 Full Voltage and Real Error Source

hongwei duan
Intellectual 450 points
Part Number: BQ24610


Hello, I want to ask, my VCC input 18V, the battery set to be full of 16.8V, the actual constant voltage charge is 16.74, the pre-charge set to be 50mv, the voltage is 16.71 when the full indicator light is on. I think why can't it reach 16.8V?

  • 0
    TI__Mastermind 24075 points
    Hi user4960217,
    From these values these seem to be within the specifications of charge regulation voltage accuracy of +/- 0.5% from our Electrical Characteristics table. One thing to note is that there is impedance from where Vfb is sensed by the IC and the battery in typical applications. When termination condition is hit, there will be an artificial voltage drop across Rimp*Iterm which tricks IC into thinking battery is charged. This depends on your termination current setting and impedance of wires/trace. You can try lowering your termination current to reduce the effect of this extra voltage, so battery is charged more fully, but from your results this seems to be with expected range.