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BQ51025EVM-649: About BQ51025EVM-649 Application Question

Wen Yung
Expert 1220 points
Part Number: BQ51025EVM-649
Other Parts Discussed in Thread: BQ501210, BQ500215, BQ51025, BQ500101

Hi Sir,

May I know TI BQ51025EVM-649(PWR649) can meet Qi standard?
Why EVM output spec design 7V/1.43A? it's Qi request?
May I design output watt at 5V/2A?

Wen

  • 0
    TI__Guru* 75806 points
    Hi Wen
    The bq51025 can be Qi certified at 5W for low power, not 10W or 15W. The 10W mode is TI proprietary and will only work with the bq500215 and bq501210.
    I do not recommend 5V at 2A due to thermal and load regulation, see data sheet figure 18 and 19.
  • 0 in reply to Bill Johns
    Expert 1220 points

    Hi Bill,

    Thanks for your response.

    also I have some question about TX EVM bq501210.

    1. May I know bq500101 function is buck topology for full bridge use? optima TP18 voltage is what?

    2. Looks EVM is fix switch frequency 130kHz. May I know buck topology also cover full bridge load regulation?

    3. Could you help provide explain detail for schematic circuit email to me?

  • 0 in reply to Wen Yung
    TI__Guru* 75806 points
    1. May I know bq500101 function is buck topology for full bridge use? optima TP18 voltage is what?------ This topology is a rail control, the H-Bridge operates at a fixed freq and the control element is the rail control buck that changes the voltage going into the H-Bridge. U1 is a BUCK that produces Rail Voltage for the H-bridge.

    2. Looks EVM is fix switch frequency 130kHz. May I know buck topology also cover full bridge load regulation?---See above

    3. Could you help provide explain detail for schematic circuit email to me?--What area of the circuit are you interested.
  • 0 in reply to Bill Johns
    Expert 2040 points
    Hi Bill,

    May I discuss with you off-line via email? thanks.

    Regards,
    Duke
  • 0 in reply to Kuo Duke
    TI__Guru* 75806 points
    I will contact you.