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LSF0108: LSF0108RKSR about Maximum Power Dissipation

Lawrence He
Genius 3115 points
Part Number: LSF0108

Hi, Support Team

What`s LSF0108RKSR Maximum Power Dissipation(Pd)?

Formula and Values used to calculate Pd or Pd calculation tool used?

if any Comments, Please advise me.

Thanks,

Best regards,

Lawrence

  • 0
    Guru 317370 points

    The LSF is a passive switch; the switches behave pretty much like resistors.

    The maximum allowed power dissipation is that which does not result in exceeding the maximum junction temperature, i.e., TA + RθJA × Pd < TJmax.

    The leakage currents (Vref_A/B) are negligible. You can compute the power dissipation from the channel currents and the on resistance, i.e., Pd = N × Ich × ron, where N × Ich is the total current.

  • 0 in reply to Clemens Ladisch
    TI__Mastermind 41216 points

    In addition to Clemens, see the FAQ for more information in regards to the calculation of max power dissipation.