Are Zippy Lipos safe with a Castle MMM Speedy?

[MrMin]

I just took another look for our friend briang(see other post). I carefully counted only two banks of 6 fets. They were placed in the same place as the 80A, but there were only 12 of them. I could not remove the heatsink - it was glued there, all visible chips were the KIA78D05F (looks like a regulator/power transistor) and a uC whose numbers were filed away. The layout was almost identical to the 80A (see briang's post) and the fan has 4 hex nuts which just screw (barely) into the heatsink..I got to find a way to keep the fan on.... The rubber seal also is useless because there is a hole there...I doubt it really can compete with the mmm, but I'll give it a try someday - it is my backup esc anyway.

[BrianG]

36?? I only counted 18 on the MMM. Then again, I haven't taken apart my V3 for fear of damaging the warranty.

[e-mike]

only 18 fet's....i always thinking that this beast had more than 18 fet's

[Pdelcast]

Originally Posted by BrianG

36?? I only counted 18 on the MMM. Then again, I haven't taken apart my V3 for fear of damaging the warranty.

All the MMM versions have 36 FETs.

Picture of MMM without heatsinks: (Sorry -- took the picture with my phone, not very clear....)

[Pdelcast]

Originally Posted by MrMin

I just took another look for our friend briang(see other post). I carefully counted only two banks of 6 fets. They were placed in the same place as the 80A, but there were only 12 of them. I could not remove the heatsink - it was glued there, all visible chips were the KIA78D05F (looks like a regulator/power transistor) and a uC whose numbers were filed away. The layout was almost identical to the 80A (see briang's post) and the fan has 4 hex nuts which just screw (barely) into the heatsink..I got to find a way to keep the fan on.... The rubber seal also is useless because there is a hole there...I doubt it really can compete with the mmm, but I'll give it a try someday - it is my backup esc anyway.

The Sidewinder has 12 FETs, the Mamba Max has 30, and the Mamba Monster has 36. I don't know how they could rate the controller for that many amps with that few FETs.

[slimthelineman]

hey patrick, any 6s batteries come to mind for racing a rc8/1512 3D? currently running some neu 3200 xp's but the tech @ castle said they were a little too small.

[Pdelcast]

And for those who might be interested, here is a panel of 20 MMM boards, with a single X-OUT circuit (bad circuit detected by test machines, and left unpopulated.)

[e-mike]

thanks for the clarification Pdelcast!!!!!like ive said so many time the mmm is a powerful esc

[Pdelcast]

Originally Posted by slimthelineman

hey patrick, any 6s batteries come to mind for racing a rc8/1512 3D? currently running some neu 3200 xp's but the tech @ castle said they were a little too small.

We use a lot of different batteries here with good luck, but I think everything we have used has been in the 5500mah or larger range. I'll ask Mike to recommend something for you.

Thanx!

[e-mike]

so there not a big difference(in fet's number) between the mamba max and the mmm... why the monster it is a lot more powerfull???

[sikeston34m]

Originally Posted by Pdelcast

And for those who might be interested, here is a panel of 20 MMM boards, with a single X-OUT circuit (bad circuit detected by test machines, and left unpopulated.)

Wow Patrick!

That's some really neat stuff you're doing there. I think I could just get lost on your side of the street.

I want to learn more, that's why I ask so many questions sometimes.

[Pdelcast]

Originally Posted by e-mike

so there not a big difference(in fet's number) between the mamba max and the mmm... why the monster it is a lot more powerfull???

The number of FETs dictate the amount of current (AMPS) that the controller can handle. The Mamba Max and the Monster Max are similar in peak amp handling capability, but because the Monster has a large heat sink and fan and more FETs, it's continuous amp capability is a little higher.

The Monster is also capable of double the voltage of the Mamba Max, which doubles the power handling capability.

ALSO, the FETs are better today than when we designed the Mamba Max -- so the current version of the Mamba Max can handle more power than the original. (the number of FETs is a bit of an overkill on the Mamba Max.)

[johnrobholmes]

The MMM build is almost fully automated then eh? Pick and place for the bullets? I would guess you put on the heatsink and case by hand.

[Pdelcast]

Originally Posted by johnrobholmes

The MMM build is almost fully automated then eh? Pick and place for the bullets? I would guess you put on the heatsink and case by hand.

Actually, the bullets are placed by hand before reflow. Wish we could place them by machine, but they are through-hole and a tight fit (for current handling.) (It takes a steady hand to place them...)

Power wires are soldered by hand, cases, labels, heat sinks, fans, etc. are all placed and assembled by hand.

[e-mike]

Originally Posted by Pdelcast

The number of FETs dictate the amount of current (AMPS) that the controller can handle. The Mamba Max and the Monster Max are similar in peak amp handling capability, but because the Monster has a large heat sink and fan and more FETs, it's continuous amp capability is a little higher.

The Monster is also capable of double the voltage of the Mamba Max, which doubles the power handling capability.

ALSO, the FETs are better today than when we designed the Mamba Max -- so the current version of the Mamba Max can handle more power than the original. (the number of FETs is a bit of an overkill on the Mamba Max.)

wow you want explanation....youve got itso the actual mamba max can handle more current...than the hold version....good i will try it on 6 cell lipo(joke)

thanks again.Pdelcast..

dont forget guy'sjust use the right pinion and spur and see what happen