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TPS50601A-SP: Confirmation

May
Genius 9880 points
Part Number: TPS50601A-SP

Hi,

Customer want to know if  the IC contain a parallel diode to avoid the use of the body diode?

According to them, in either case the diode drop before the FET is conducting is needed.

They suggested to include this in the datasheet.

Thank you in advance.

Regards,
Maynard

  • 0
    TI__Genius 14540 points

    Hi Maynard,

    To my knowledge there is not internal parallel diode.  Our EVMs typically employ an external Shottky diode in parallel with the low side FET but this is not required (we have tested with and without).  This diode provides faster reverse charge recovery compared to the body diode of the LS FET.  This mitigates the negative voltage spike on the phase node and improves efficiency of the converter slightly.  

    Thanks,

    Christian

  • 0 in reply to Christian Yots
    TI__Genius 9880 points

    HI Christian,

    Thank you for your response.

    Customer want to confirm also what external Shottky diode used in the EVM as you have mentioned above? 

    Regards,
    Maynard

  • 0 in reply to Christian Yots
    TI__Genius 9880 points

    Hi Christian,

    Just want to follow up.

    What type of external Shottky diode used in the EVM?

    Regards,
    Maynard

  • 0 in reply to May
    TI__Genius 14540 points

    Hi Maynard,

    The EVM UG shows the schematic and BOM for this EVM.  We have installed the following diode in this design

    Designator Qty Value Description                          Package Reference Part Number Manufacturer

    D3              1     30V   Diode, Schottky, 30 V, 2 A, SMB        SMB          B230-13-F     Diodes Inc.

    Thanks

    Christian