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DRV2700EVM-HV500: Please suggest the transformer with higher saturation current for DRV2700 HV flyback application

Part Number: DRV2700EVM-HV500


Currently we are using the DRV2700 to drive the piezoactuator as fast as we can. The saturation current of ATB3225, you suggested in HV500 is 0.6A. It is too small for us. Can you help to suggest a transformer with higher saturation current (~2A)?. We hope DRV2700 can have 150V 60mA output capability. Very appreciate your help.

4 Replies

  • Hello Tina,

    thank you for posting your problem on E2E and sorry for the late response.

    Just to clarify, would you need a +150V output from DRV2700 itself to get even higher voltages or do you just need a 150V output voltage? Because the device can only output 100V.

    60mA you need on the output of the flyback? If so, that should not be a problem.

    Best regards,
    Marko
  • In reply to Marko Grdakovic:

    Hi Marko,

    I use the reference circuit of http://www.ti.com/tool/drv2700evm-hv500 

  • In reply to Marko Grdakovic:

    Hi Marko,

    I use the reference circuit of DRV2700EVM-HV500 which can have 500V output voltage.

    But I only need 150V. and I need around 60mA output current capability.

    But in the BOM of  your DRV2700EVM-HV500, the saturation current is only 0.6A.

    Can you suggest a  transformer with higher saturation current for my application.

    Thanks a lot!

    http://www.ti.com/tool/drv2700evm-hv500 

  • In reply to Tina Hsing:

    Hi Tina,

    Please contact TDK or other inductor manufactures and asking them about what inductors they have available to support 150V and a higher current rating. The inductors we have investigated will not support a 2A saturation current. If you only need 150V output, you can consider a significantly lower turns ratio inductor. For example you could use a 1:5 ratio with the boost set to 30V to achieve 150V operation. Or even a 1:2 ratio with the boost at 75V.

    Regards,
    Kelly Griffin
    Application Engineer

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