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LM5060: Mosfet selection for LM5060EVAL for 10A continuous current

Felix Risch25
Intellectual 1110 points
Part Number: LM5060
Other Parts Discussed in Thread: CSD19536KTT, LM5069

Hello team,

one of my customers is evaluating the LM5060 with our EVM. The continuous current in their application is 10A and the capacitive loading is  > 1 mF! The nominal voltage is in the range of 60V.

Can you help us selecting an appropriate MOSFET for this application? I would guess that the startup is critical, where the Fet goes through the linear region. Will CSD1953x in D2PAK work for this kind of application? If not, which would be fine for evaluating the circuitry in D2PAK?

Thank you and kind regards,

Felix

  • 0
    TI__Genius 10370 points

    Hi Felix,

    Is this an Automotive application?

    Your thoughts are correct with regards to start-up. This is the most critical when trying to decide with FET to use. I would recommend either the CSD19536KTT (Texas Instruments) or the PSMN4R8-100BSE (NXP). Look below for a comparison:

    Just a heads up that the LM5060 does NOT offer short circuit protection, and is NOT a true current limit device. The fault timer begins once the current limit threshold is reached, but the gate will not regulate during this time (Gate is fully up until fault timer expires).

    If the customer would like short-circuit protection and a true current limit, I would recommend the LM5069.

    One last thing, we have these nifty calculator tools to help customers design with our hotswap controllers. This will help review and troubleshoot your design, and would greatly speed up the back-forth communication of questions we would have for information needed for the review (such as total output cap including anything connected downstream from the output node, which may not be shown on a partial schematic).

    You can find it by going to www.ti.com/hotswap ==> click on “Tools & software” ==> then click on “Hot Swap design calculator tools”

    For help on filling out the excel spreadsheet, we have video tutorials. They explain how to enter the correct values cell by cell. The videos are at www.ti.com/hotswap ==> Click on “Support & Training” tab.

    I hope this helps :-)

    Best Regards,

    Aramis P. Alvarez