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bq51013 several boards differences

Kurt Dober
Prodigy 20 points
Other Parts Discussed in Thread: BQ51013, BQ500210

Hi,

I have build up several receiverboards with the bq51013. Though there are no differences in the assambly and pcb-board,

ther are differences in output voltage and current. I need an output of  min 4.8V at 0.8A . I just can reach this value with only

one board. Is there any suggestion what I can do? Any idea of what's the reason of that?

Thanks for your help

  • 0
    TI__Guru* 75886 points

    Hi Kurt

    Some possible items to look at:

    1.)    Is the problem thermal, bq51013 is overheating and shutting down? If this is the problem the bq500210 TX will stop power transfer and display a red fault LED.  013 is sending End Power Transfer (EPT).

    2.)    Communications issue between 013 receiver and 210 transmitter at higher current outputs?  If the transmitter does not receive a valid communication from the receiver for 1.5S it will shutdown and attempt a restart. You may try increasing the communications capacitors (C13 and C22 on EVM) from 22nf to 68nf.

    3.)    Is the receiver coil tuned correctly?  The values of Cs (C1, C2 and C3) need to be changed to match the coil.  See data sheet for tuning instructions.

    4.)    Is the receiver coil suitable for 1A output current?  I have seen coil designs that work well at lower currents such as 500mA but have efficiency and communications problems as load is increased.

  • 0 in reply to Bill Johns
    Prodigy 20 points

    Hi Bill,

    do you know is there any chance to get an output power up to 10W. TI had announced a solution for higher output power than 5W.

    Is there any chance in near future?

    kind regards

    Kurt

     

  • 0 in reply to Kurt Dober
    TI__Guru* 75886 points

    We do not have any released 10W solutions and nothing in the near future.

     Contact you local TI representative for more info regarding product road maps and information on pre-release parts.