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LM3478: LM3478 Isen 1pin current

user3980991
Prodigy 80 points
Part Number: LM3478

Hi,

Please tell me the current value of LM3478   Isen 1pin .

I think it will not flow.

How many current values should be estimated to make it a Isen pin pattern?

（Rsn is made thick.）

I am referring to AN-1484.

  • 0
    TI__Mastermind 21720 points
    Hello,

    The ISEN pin will source a current in a ramp waveform. The peak of this ramp is 40uA regardless of frequency. This is stated in section 7.3.2 of the datasheet.

    Typically the RSN value is calculated at the worst case operating point. For this design that is when VIN is 3V and the load current is 2.5A

    Thanks,

    Garrett