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Selecting a proper MOSFET with diagnostics capability

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ku637

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Hi,

I have been going through an application which requires 62A high side output with around 80A peak current support for 10s for an automotive application.

Im checking one part BTS50055-1TMA from infineon. There seems two specification IL(ISO)=70A and IL(NOM)=17A. Im not sure which one to follow. Will this device suit my purpose. Im clueless about IL(ISO) specification.

infineon.com/dgdl/Infineon-BTS50055-1TMB-DS-v01_00-EN.pdf?fileId=5546d4625a888733015aa9af94f035c9

Thanks for any help
 

Reviewing the conditions given for IL(nom) should answer your question.

Device on 50mm*50mm*1.5mm epoxy PCB FR4 with 6cm2 (one layer, 70µm thick) copper area for Vbb connection. PCB is vertical without blown air.

The device can surely handle 62/80A, but only with appropriate heatsink. IL(iso) conditions are well defined: Tcase = 85 °C. I presume you can do basic Rth calculations.
 

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