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LM5145: Fsw accuracy

Taketo Sato
Genius 10325 points
Part Number: LM5145

Tool/software:

Hello team,

What is switching frequency accuracy of LM5145 when we set as 1MHz?

Can we expect it is about +/-5% because datasheet spec table says it in case of 400kHz setting(Rrt=25kohm).

Best regards,

  • +1
    TI__Genius 11495 points

    Hi Sato San,

    Yes - +/-5% is a good estimate. We validate only for 400kHz as you pointed out - however, I do not expect the frequency variance to be much different for 1MHz. Hence, you can consider +/-5% here. 

    Also, the frequency variance will also depend on the accuracy of the Rt resistor. (1% accuracy resistor is recommended here). 

    Thanks,

    Best Regards,

    Taru