short circuit protection on buck DC/DC converter LTC3892-1

Hi everyone

    I am design a abuck dc/dc(LTC3892-1) converter、the output is 14V 36A,When I do the short circuit protection test, the BG1 pin burns out, I want to know if LTC3892-1 has short circuit protection?

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    •  Analog Employees 
    on Dec 7, 2020 9:20 AM

    Hi mingtian,

    As stated on page 16 of datasheet, there should be foldback current for short-circuit protection. You are building a 500W converter which is not easy to do.  I assume you started by doing your own board. We usually recommend to start with a working design especially if you don't have power design experience. DC2190A-A demo board is a good way to start.

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  • 0
    •  Analog Employees 
    on Dec 7, 2020 9:20 AM

    Hi mingtian,

    As stated on page 16 of datasheet, there should be foldback current for short-circuit protection. You are building a 500W converter which is not easy to do.  I assume you started by doing your own board. We usually recommend to start with a working design especially if you don't have power design experience. DC2190A-A demo board is a good way to start.

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