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Original question:

LM25149-Q1EVM-2100: LM25149-Q1

LM25149-Q1EVM-2100: deadtime

Mona Guo
Prodigy 610 points
Part Number: LM25149-Q1EVM-2100
Other Parts Discussed in Thread: LM25149

Hi, team

Do we have min and max deadtime value for LM25149? Cause I only see there is typical value on datasheet.

  • +1
    TI__Mastermind 22299 points

    Hi Mona,

    The deadtime is adaptive, the controller looks for SW node voltage to fall before turning on LO.

    The minimum deadtime will be related to SW node parasitic capacitance and SW current, and how long SW takes to fall. 

    The maximum deadtime is ~40ns, after which LO will be turned on.

    Hope this helps,

    -Orlando