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TPS54560B-Q1: Schematic and PCB validation for power distribution board

Balkrushna Waghmere
Prodigy 70 points
Part Number: TPS54560B-Q1
Other Parts Discussed in Thread: TPS62933

We made our custom power distribution board for a micro drone.

The board is supposed to supply:

  • 20A at 17.4V to a 4in1 ESC (powering 4 BLDC motors) max - Battery

  • 5V to flight controller at 3A max - TPS54560B-Q1

  • 12V to video transmission system at 1A max - TPS54560B-Q1

Requesting a review of the schematic, and if it's possible, the PCB.

Our Schematic

TI Webench designer schematic:

There are some differences between web bench BOM and our parts, input capacitors.

Device Our Webench
Cin 100u (from battery aluminum electrolytic) +10u+2.2u+0.1u 4.7u

Please let us know if we can get a review of PCB design too.

  • 0
    TI__Guru 50120 points

    Hello,

    If there is a PCB layout to review, please provide it here so I can have both for reference. 

    Once I get both schematic and PCB layout, I can review at once at close out thread support.

    Else please expect to received feedback on schematic by Tuesday (2/6/24) PST time.

    Regards.

    Jimmy

  • 0 in reply to Jimmy Hua
    Prodigy 70 points

    Hello Jimmy, 

    We are changing our design with respect to the dc-dc converter. The application requires no more than 2-2.5A at maximum for the 5V rail and no more than 1A for 12V so thinking about going ahead with TPS62933 buck IC, before moving forward with the design we wanted to know if it's a good idea for a max 17.5V application for drones, which may see voltage spikes. High value aluminum electrolytic / solid tantalum cap on input may help? 

  • +1 in reply to Balkrushna Waghmere
    TI__Guru 50120 points

    Hello,

    The TPS62933 is rated for up to 30V and with a high value electrolytic with moderate ESR, there should be enough damping to help mitigated voltage spikes.

    I think you can move ahead with using the TPS62933 here.

    Regards,

    Jimmy