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LM3466: Vsense level

Chien Nguyen90
Prodigy 30 points
Part Number: LM3466

The LM3466 data sheet specifies Vsense accuracy at 200mV. I would like to know the accuracy where Vsense is above 200mV. The typical application circuit of Figure 19 set Vsense at 350mV, which is above the 200mV specified. So what is the limit of Vsense voltage? Do you have a graph that show Vsense accuracy vs. Vsense voltage? I saw in the forum some answer from TI that indicate it is ok to use Vsense greater than 200m, but would or how it impacts the accuracy specification?

Thank you for your support

Chien Nguyen

  • 0
    TI__Mastermind 28655 points

    Hello Chien,

    The limit of the Vsen voltage is much higher than 350 mV.  It was designed to be accurate so the datasheet shows the accuracy at 200 mV.  It should be at least this accurate above this voltage and more likely to be more accurate.  I need to ask for actual numbers and can update after I get them.  For most designs the limiting factor is efficiency.  The higher Vsen is the more dissipation there is in the current sense resistor.

    Regards,