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LM5060-Q1: Inquiry about overcurrent threshold of Hot Swap design calculator tools.

Charles Jeon
Expert 2975 points
Part Number: LM5060-Q1
Other Parts Discussed in Thread: LM5060

Hi Team.

My customer wants to configure the B2B switch circuit using the LM5060-Q1.

And he wants to use the OCP function with Idsth of the LM5060-Q1.

He was trying to set the overcurrent threshold using the calculator tool provided by ti, but there was a problem because of the difference between the worst case and the typical value.

If you want to adjust Idsth based on 160A, what value should you choose between Minimum, Maximun, Typical?

And there are severe deviations in the three cases. How can you reduce the variance?

Is there any way to measure current more precisely?

(Please note that the customer only reviews parts with automotive certification as an auto parts manufacturer.)

Thank you!

  • 0
    TI__Expert 5940 points
    Charles,

    The LM5060 isn't precise since it uses RDSON sense for current limit. This is a timed out circuit breaker so an over current condition will likely cause FET failure unless the line impedance is very high and limits di/dt. The tool shows the min, typ, and max current trip points based on the Rdson inputs. There isn't a way to improve the accuracy with this IC. We don't have another hotswap Q1 device.

    Brian