Tool/software:
I'm currently working on a single-channel power switching board.
It's a small form factor (About the size of a quarter) with limited thermal mass.
I'm trying to drive two linear worm gear motors - but am finding the aforementioned part burn when the motors hit the end of movement range and starts using 45 amps of current.
In order to allow my design to drive 30 amps of starting current I'm using the D variant of TPS1HA08-Q1 and monitor SNS output - manually shutting down via the enable pin.
The issue is that I'm seeing the package start to take damage within about 30-50ms of high current. (45A)
I've found that the part will burn to a crisp before shutdown occurs. It gets more than hot enough to melt the 63/47 solder that I'm using for testing - meaning that the temperature is climbing well above the 150C absolute maximum operating temperature of this part.
It should also be noted that I could only replicate this with a motor - and a resistive load did not produce this same failure mode.
Any ideas what could be causing the failure I'm seeing?
