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LM74930-Q1: Recomended COUT value

William Washington
Prodigy 40 points
Part Number: LM74930-Q1

Tool/software:

In the Datasheet Oct2023 section 8.2.2.3 it recommends COUT of 0.1uF, this seems to be an error, since both Figure 8.1 and the EVM (C10) use 100uF for COUT.

Thank you

  • 0
    TI__Mastermind 46660 points

    Hi William,

    Thats the minimum value of 0.1uF

    Recommended value doesnt really exist as it is more of a system level requirement. It is a holdup capacitance which provides power to downstream load in case of input voltage failure.

    Regards,

    Shiven Dhir

  • +1 in reply to Shiven Dhir
    Prodigy 40 points

    Thank you Shiven, that makes sense, and yes I did understand that the COUT needs to be a holdup for the load, which is why the 0.1uF in 8.2.2.3 first caught my attention. 
    Can I suggest that in the next revision of the data sheet, the word 'minimum' be added to the 0.1uF value for COUT, and perhaps a note about it being the holdup voltage source during switching.