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[BQ500211]

Witold Swiackiewicz
Prodigy 10 points
Other Parts Discussed in Thread: BQ500211, BQ51013A

Hello everyone. I have a problem . I made a device based on Figure 6 with bq500211 datasheet.

I used coil A11 for transmiter : 

http://pl.farnell.com/wurth-elektronik/760308111/coil-wireless-charging-6-3uh-13a/dp/2291720

and buying dedicated coil for smartphone:

http://www.ebay.com/itm/Qi-wireless-Charger-receiver-Coil-Pad-Samsung-Galaxy-S3-III-i9300-Hot-/131151779205

on pins (12 ; 13) DPWM_A DPWM_B i have this curves

Power stage is ok. I was tested on an external generator and power transfer works fine.

When I approach the receiver coil system doesn`t switch and doesn`t charge. Any suggestions? 

  • 0
    TI__Guru* 75656 points

    The signal is the normal standby for the 211, analog ping followed by digital ping.  The RX is not detected, during the digital ping it should power the RX and it will respond with signal strength, ID and Config.  See the bq51013A EVM User’s Guide  figure 6. 

    A communication problem can be caused by a large number of problems.  Try testing with a known good RX to establish some confidence in the TX.

    TX coil listed in very good.

    RX coil I have not seen.