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LMZ13610: Whether the schematic diagram of power chip is correct？

jeno.zhang
Expert 1815 points
Part Number: LMZ13610

Hi TI,

Please help to check whether the schematic diagrams of these power chips are correct and whether there is any problem?

The attachment is the schematic diagram。TSC1152V1.0_DCM-UL--page4--page8.pdf

  • 0
    TI__Guru 57555 points

    Hello

    We will review and get back to you as soon as possible.

    Thanks

  • 0 in reply to Frank De Stasi
    TI__Guru 57555 points

    Hello

    Your schematic looks good to me.

    I do see two things to keep in mind:

    1.  You have no input filter damping.  The large input filter inductance

    can resonate with the ceramic input capacitors and may cause excessive ringing

    and possible overvoltage on the input.  It is best to use a small aluminium electrolytic capacitor

    on the input to help damp this input circuit.  The ESR of the electrolytic capacitor will provide damping.

    A 22uF or 47uF may be all that is required. I have attached an application note here that may help.

    2.  It is is good idea to leave a place on the PCB for a capacitor across the top feedback resistor.

    This may be needed to provide good loop phase margin and/or good load transient response.

    It can be DNP until if and/or when you need it.

    Also, we are happy to review your PCB layout when it is ready.

    Thanks

    snva489c_emi_filter.pdf

  • 0
    TI__Mastermind 47060 points

    Hi,

    I've also taken a look at the schematic and agreed with Frank's assessment. 

    Regards,

    Jimmy