Originally Posted by PsyM4n
The nikos 2plus1 combination dissipates heat better and has higher output capabilities. There are actual physical limitations and power requirements affecting the TI part in this case.
The nikos combo should indeed be slightly less efficient than the TI. That's less important since the difference is too small anyway to begin with and the input can supply enough power to the fet (the eps limit is high enough for that).
The TI part would be more than just "a little" better if the nikos were used in a 1plus1 configuration.
That behavior is pretty much why manufacturers nowadays tend to shy away from independent fets and seek parts with more integration.
When you are at the levels of RDSon we are talking about, its a 20% difference. That is a large difference in heat output at high load, and the hotter a FET runs the less power it is capable of handling and the more heat it generates.
Thats actually why Niko Semi parts get a bad wrap. Thermal runaway is a thing. You have to de-rate their parts more than their competitors, so the specs in their datasheet don't really mean much.Edited by KarathKasun - 5/2/17 at 1:08am