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LM5176: LM5176 Inquiry

Hyunkyu Noh
Prodigy 20 points
Part Number: LM5176

Tool/software:

LM5176 Inquiry The input voltage is 28V. The input voltage range is 24V ~ 32V. The output specification is 28V / 36A.

But even when the normal voltage range is 24V, 42A should be allowed.

The LM5176 IC is a controller, so doesn't it use current depending on the power component??

The LM5176 datasheet shows a maximum of 6A as an example. And the Web Bench says the maximum current is 25A.

Which one is correct?? And if it's 25A, it can't meet 36A, and there's no information about parallel configuration in the datasheet.

Can I use it for 28V 36A output?? Or can you recommend another part?

  • 0
    TI__Prodigy 550 points

    Hi Hyunkyu,

    Thanks for reaching out via e2e. May I ask you where did you get the values you mentioned (6A and 42A, I see 25A is given on Webench)?

    Generally speaking you're correct, when using a controller the maximum current is mainly limited by the switch you use. However, be aware that the controller must still be able to drive that switch, to make sure that it completely turns on.

    Don't know if you're already aware of it, but we provide a quick start excel calculator for the device (attached here below), where you can play around with different parameters. Also, on the Power Stage Designer you can try out different configurations for your converter.

     snvc208a.zip

    Hope this answers your question.

    Kind regards,

    Federico