Quote Originally Posted by lerameur View Post
I have a big ass heat sink, about 9 times he size of the chip.
I believe I was under th wattage recommended (or maybe just on it, cause the battery was fully charged at 12.85 and @ 1.9 amp 24.7 watt.
would that of killed it.

I looked at comse circuit for making my own H-bridge, but is seems a bit messy.
I have some IRFZ44N N mos, maybe get their brother P's and work with that, you have any schematic ?
I found this: http://www.armory.com/~rstevew/Publi...d/nch-brdg.htm
but I dont know


update:
I tried one IRFZ44N , it become very hot with just 5watt. I know I can put a heat sink, but this thing is suppose to support 94 watt. Is there somehting I am not getting ??
Well, like I said, the only way something can dissipate heat is if it has resistance in the first place, zero ohms across a device = zero volts dropped across it = zero watts dissipated in it. If that MOSFET is a standard MOSFET, and you're driving it with 5v, it isn't going to work very well. You need a logic level MOSFET, one that's designed to be driven with 5v. And monster heat sinks only work well up to a point. You can only get rid of so much heat so fast, they got limits too.
Why not post a schematic...we'll get a better idea of what you're up to. (on a side note, I haven't gotten over to the L298N datasheet yet).