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TPS2482: relationship where lower current limit needs lower slew rate

Adam Daluga
Expert 6030 points
Part Number: TPS2482

Hello,

I have a question regarding the use of the TPS2482. We are using the TPS2482 as an inrush controller and utilizing output voltage slew rate control by placing a resistor and capacitor on the gate of the input mosfet. During prototyping, we had a board where the input mosfet broke as we were trying different current limits. The Design Calculator worksheet parameters would suggest that our design was ok but the lowering of max slew rate as current limit was lowered caught my attention. According to the worksheet, the maximum slew rate is tied to the current limit for the device. I’m having trouble understanding the relationship where a lower current limit would need a lower slew rate. I’m hoping you would be able to help me understand this relationship a little better.

Thanks,
Adam