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TPS54160: In DCM mode, the inductor current shows a negative value

Part Number: TPS54160


Tool/software:

Dear Experts,

In traditional DCM mode, the inductor current should reach 0 and should not have negative values. Currently, our testing is consistent with the specifications, and the inductor current will have negative values. Is this normal? I would like to ask what causes this inductor current to reach negative values. Thank you