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VNH3SP30-E overheating issue

Question asked by battershell.liam on Apr 22, 2015
Hello all,

I am having a bit of trouble with the VNH3SP30-E overheating. the part should be capable of supplying 30Amps continuously however when I supply 20 amps the chip overheats and shuts down after around 10 seconds of operation . the wiring for the part is as it should be according to the datasheet. I couldnt see any heatsync requirements beyond the track widths of the pads under the chip. one thing i thought of was that perhapse i have misunderstood the specification and having 20 amps flowing from one half bridge into the other half bridge is equivalent to 40 amps? I dont think this should be the case. Any tips you have would be greatly appreciated.

I will do some more testing and update this post

Many thanks