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TPS548D22: Full differential sense feature

Miranda Gu
Mastermind 18712 points

Part Number: TPS548D22

Hi team,

Could you please explain more about full differential sense feature of TPS548D22 ?
My customers think it's a technique to solve the difference of ground voltage between input stage and output stage. Please correct it if it's wrong.

  • +1
    TI__Expert 5310 points

    Hello,

    The reason why differential sense is used is to bypass any resistive drops in the power path (including the ground return). TI recommends routing the differential sense to the point of regulation in a differential pair. This helps bypass any series resistance in the ground return and board connection between the inductor and the point of load. As a result, using a differential amplifier to sense the load voltage as opposed to a single pin feedback allows for better load regulation typically as well.

    Regards,

    Alec Biesterfeld