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UC3907: Automotive grade

Nima KV
Prodigy 30 points
Part Number: UC3907

Does UC3907 has automotive grade counterpart?

And also is there any power or current limitation for the modules it can control?

  • +1
    TI__Intellectual 2240 points

    Hi Nima,

    Thanks for reaching out! 

    Unfortunately, we do not have automotive grade load share controllers and we currently don't have any future plans on having -Q1 parts for load share controllers.

    As for power or current limitations, I have assigned this thread to an expert to comment on this, he will respond to you in 1-2 business days.

     Thanks.

  • 0
    TI__Mastermind 31130 points

    Hello Nima, 

    There is no theoretical limitation on the power level or current level of each module that can be controlled for sharing.  As long as the current-sense signal is scaled correctly, N modules can equally share the total current within the percentage of accuracy capability of the control.

    The total number of parallel modules "N", however, does have a limit because the Buffer Amplifier that drives the Current Share Bus has a limited guaranteed drive capability.
    Typically this current can be 15mA, but worst case it can be as low as 6mA.  It's internal load resistance is typically 10K ohm, but can be as low as 5K.
    So in the worst-case, the module with the highest current sets the voltage on the Current Share Bus and if it is capable of only 6mA and each module has a 5K load, then the highest guaranteed number of parallel modules is N = (5K * 6mA) / Vcsb (where Vcsb is the highest Current Share Bus voltage).  

    Regards,
    Ulrich