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Originally Posted by AAngel
Griffin,
Two mamba boards in parallel? Would this be similar to just soldering on a bunch of FETs in parallel to those already on the board? Forgive me if that is an ignorant question. It's just that I was thinking about it as I was sitting in court today. I wondered what the effect would be if I just soldered a bunch of FETs in parallel to those already there. Wouldn't that almost double the esc's ability to handle current? If this is just plain stupid, let me know. If it is a possibility, let me know that too. I'll source some FETs and maybe get lucky.
I don't know if this tells you anything, but I got back a couple of MMs that I sent to Castle for repair. The repair receipt says that the cause of the failure was "FET Failure." It also says, parts used:
6-BSC022N
2-F320
6-ISL6700
2-BAT54A
2-TL750
4-BAW56LT1
2-LM2665
2-LM3394
Obviously (I think) the prefix number preceeding the hypen is the number of components used to repair my two escs, but the rest of the stuff might shed light to someone that knows what they are doing.
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Thank you, I will check on parts...
As far putting FET's on top each other, you can do that, but MAMBA MAX ESC is not the best one to try that. I need to do some homework to understand why they didn't install resistor in series with FET's gates, but that might be just mistake or trick which I need to find out. If you add more FET's then you definitely need to add resistors and maybe replace boost caps. Another thought what is working great with TO-220/D2-pak packages doesn't work great with SOIC/SO-8, I am afraid that in addition to soldering you need to use some bonding compound to hold chip in place and provide good heatsinking.
And, fundamentally, YES it would increase current handling and decrease internal resistance.