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Using A5 coil with BQ500110EVM-688

Alberto Peralta2
Prodigy 10 points
Other Parts Discussed in Thread: BQ500110EVM-688, BQ500110, BQ500211, BQ500410

Hello, 

I have an BQ500110EVM-688  with its original A1 Tx coil connected to it.  I also have  an A5  coil that needs to be tested under power. If I  remove the A1  coil ,connect the A5  coil to the board and change the resonating caps accordingly (L =6uH) , would this system perform well under power? 

Thank you

  • 0
    TI__Guru* 75856 points

    Question:

    I have an BQ500110EVM-688  with its original A1 Tx coil connected to it.  I also have  an A5  coil that needs to be tested under power. If I  remove the A1  coil ,connect the A5  coil to the board and change the resonating caps accordingly (L =6uH) , would this system perform well under power? 

    I do NOT recommend this configuration.  The bq500110 is an early WPC TX IC designed to support a 19V A1 type system.  The A5 coil is a 5V input system. 

    It would be best to use a 5V TX design, bq500211 / 211A or 212A.

    Also adding a boost converter to the input for bq500110 would work.  Take a look at the bq500410 EVM.  That 5V to 12V design can probably be scaled up to 19V output.