LT3761 having issues every time, no matter what.

Hi. I am designing a boost LED driver using LT3761.

Using the datasheet examples I designed and ordered PCBs, assembled them, but every time I connect the power one of four things explode: fuse, driver, boost MOSFET or sense shunt. I tried many different LEDs, calculated and populated different sets of components, but the result is the same. I tried the exact values from the datasheet's first example, boost driver for 1A led, the result is the same.

I have several years of hardware design experience and all my designed projects work well. I understand all the principles of the operation of LT3761. I do not know what is wrong here.

Please see the attached schematic and the PCB.

The Inductor is 10uH.

Thank you.



removed word Explodes
[edited by: lallison at 2:24 PM (GMT 0) on 21 Mar 2019]
    •  Analog Employees 
    on Mar 22, 2019 8:11 AM

    We always recommend that the demo board which is available in ADI website is a good start point for any designs. It works and ADI stands behind it.

    Customer support will be taken off forum by email. Considered close.