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BQ51013B: Production testing of Qi receivers (bq51013B, bq51003, etc.)

Derek
Mastermind 9802 points
Part Number: BQ51013B

Hello,

   I'm building a device that incorporates a bq51013B based receiver. What is the best way to quickly verify that the receive circuit on the PCBA is working? This is before the coil is attached, just the populated PCBA. Can I take a qi transmitter dev board, remove the coil, and hard wire it to the receiver through voltage limiting resistors to simulate the two coils being near each other? I don't want to have a transmit coil taped to a receive coil because there are a lot of devices being tested simultaneously and that would just generate a lot of interference.


Thanks,

Derek

  • 0
    TI__Guru* 75936 points

    Hi Derek

    The problem will be communication between the RX and TX.  If two are not talking TX will turn off and BQ51013B will not turn on output. 

    A test set up with dedicated RX coil taped to a TX with lead running to Unit Under Test would probably work. Does this approach avoid the interference problems?

  • 0 in reply to Bill Johns
    Mastermind 9802 points

    Hello, the previous version did just that - an off the shelf Qi charger with coil taped to it. But as they try to get more and more coils in the test box, it gets difficult to keep them separated. So I was thinking about just taking an off the shelf coil, snipping the wires to the coil, and attaching them to the DUT coil input through resistors. So the transmitter will always be searching for a receiver as normal, it just doesn't have a coil attached to it.

    I guess if I wanted to reduce interference with the two-coils-taped-together method I could put each pair in a box. But I was hoping to avoid that.

  • 0 in reply to Derek
    TI__Guru* 75936 points

    Hi Derek

    The best approach I can think of is the test RX coil taped to transmitter.  Then to reduce interference place transmitter in  a shield box.  Basically what you have described above.

    There are several problems connecting the transmitter directly to the receiver with no coils, drive circuit to receive circuit. The L of the TX coil is needed for correct operation of the power section.