Quote:
Originally Posted by Kevin Sevcik
I assume a short from 5V to common would damage the DSC in some fashion, yes?
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Thanks for the clarification.
Usually, it would be fine. The 5V supply will detect the short and shut itself down. Periodically it will wake up and try again. I don't remember the exact numbers, but with a dead short I think it averages out to 100-200mA (don't quote me on that). I've left the supply shorted out for hours at a time on the bench without issue.
There is a "danger zone" where it doesn't draw quite enough current to detect the fault. In a worst case scenario, a specially tuned resistance could draw up to 5 Amps continuous. Maybe the sensor + wire path has exactly the wrong amount of resistance?
I'm still mildly surprised it caused permanent damage. 5 Amps is a lot, but there is a solid connection to the power and ground planes to wick away the heat. I'm wondering if bonus current is being added to the circuit - maybe from the compressor?