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BQ500210 LED indication scheme

dean k
Prodigy 150 points
Other Parts Discussed in Thread: BQ500110, BQ500210, BQ51013

Hello,

I am working on a design which has recently made the change from the BQ500110 to the BQ500210. Everything seems to be working fine except for some unexpected behavior that I'm seeing on the LED indicators (specifically LED1 on the BQ500210). I am using the BQ51013 on the receiver side.

When I place the RX coil on the TX coil, LED1 begins to slowly flash green indicating power transfer. When I force the BQ51013 to terminate the transfer (by pulling TS/CTRL high) then I see LED1 turn solid green.

Then, if I stop forcing the TS/CTRL pin on the BQ51013 high and wait 5 minutes - the power transfer will start again but LED1 turns off and remains off instead of flashing. Once I send another termination packet from the BQ51013 the power transfer will stop and LED1 will turn solid green again.

I have tried LED modes 1, 3, 4 and 5 and they all show the same behavior.

Is there anyway to make LED1 not turn off (it can either remain solid or slowly flash) if a power transfer is re-initiated after a termination packet has been sent?

Any help or information would be greatly appreciated.

Regards,

Dean

  • 0
    TI__Guru* 75736 points

    I will contact you to work this off line.

  • 0 in reply to Bill Johns
    Prodigy 65 points

    Hello Bill,

    I am using the BQ500210 along with the BQ51013 and am having the exact same issues as described above on this thread. 

    Once placing the TX coil on the RX coil, the LED1 of the BQ500210 blinks slowly and charging of our battery begins.  Once charging has completed, I drive the TS/CTRL line high through a p-type mosfet in order to terminate power transfer, which causes the LED to turn solid green.  This is the behavior that we expect and want, however after some time period after, the LED turns off with no indication of fault or other error. 

    I too would be interested in any ways of making LED1 remain on or begin flashing slowly once charging is re-initiated.

     

    Thank you,

    Matt

     

  • 0 in reply to Matt Ragusa
    Prodigy 65 points

    Hey Bill,

    I never received a reply from you regarding my question above last May.  I am still experiencing the same behavior and have seen another person post the same problem.  I haven't seen any answers to the question on the forums and was curious if you have a solution or if you know what I may be doing wrong.

    I look forward to your reply.

    Thank you in advance for your help,

    Matt