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Wireless charger

Other Parts Discussed in Thread: BQ51050B, BQ500211, BQ500212A, BQ500210, MSP430G2001

Hi,

I am designing a wireless charger to charge a Li-ion battery, with a 1A charging current.

i would like to use Bq51050B for the receiver side, i need to know if the system will work if i use Bq0211 as the transmitter ( as i only see Bq50210 transmitter mentioned in the Bq51050b datasheet). my only problem with Bq50210 is that my charger should work with 12v-24 v input , is their any solution or recommendations for that?

your help is highly appreciated.

  • Mahmoud,

    The bq51050B will work with any of the TI transmitters (bq500xxx).

    Is your system going to be Qi compliant?

    Regards,

    Dick

  • Hi Dick,

    thanks for your prompt reply. yes the system will be Qi compliant.I noticed that Bq500211 is not Qi certified.

    I would like to know if Bq500212A (transmitter) and Bq51050B(receiver) would work in my application: my goal is to charge a 4.2 Li-ion battery with a charging current of 1 A.

    is there a schematic design available for the Bq500212A as i didnt see any in the datasheet ?

    thanks,

    Mahmoud

  • Mahmoud,

    The bq500212A will work well with the bq51050B.  Please look in the User's Guide for the bq500212A for a schematic.

    Note that the bq500212A is a 5V system.  If you have 12V to 24V as an input, you'll need a buck converter to drop the voltage to the appropriate level.

    Regards,

    Dick

  • hi Dick,

    I just received my PCBs lately and mounted the components. I had no luck starting the charging process when the Rx was moved closed to the charging coil ; the 3.3v regulator was always off. So, I tried having a small resistor value for R25 instead of the 523k (in bq500212A Schematic and Materials Application Package); I am not sure if this the right thing to do but it let the 3.3v regulator to be on .now when I move the Rx coil close to the Tx coil the charging starts for few seconds, the led indicator on the Rx board is on and I can see the current fluctuating between 500 mA and lower values,  but this lasts for few seconds then the Tx shuts down and had the LED indicating fault blinking slowly few times ( I am using LED mode 1) and some times it never blinked . I am not sure what is the problem here so any suggestions and help are much appreciated.

    when i first move the receiver close to the transmitter the green led would start blinking slowly , followed by the red LED blinking slowly (green led becomes off) then the red LED becomes solid red ( ?) and nothing changes aftr that until i move the receiver away. could it be because of the new R25 resistor value that its receiving a charger complete signal but its not able to go to sleep mode so it shows a fault? i tried again with the same value resistor in the application note the device never started .

    btw, I am using bq500212A for Tx and bq51050b for Rx.

    I can provide you with the schematics for both boards if this may help but they are almost identical to the ones in the application notes.

    Thanks,

    Mahmoud

  • Conversation moved to another string.

  • hi is any programming requires for this wireless charger TI IC bq500210?
  • No programming is required.
  • ok thank u
  • I have made the wireless transmitter charger with bq500210. Is receiver requires in this case or any qi enabled mobile is sufficient. what is this MSP430G2001 mixed controller? for what purpose is requires ?