What is this BS Castle is feeding this customer?

[xtremelimits285]

Originally Posted by BrianG

Do the other people at that forum know he's full of BS? It would suck if people go out and buy lipos capable of 200A just on his word... unless of course he's the one selling them!

I can understand lesser lipos, having higher resistance, allow higher ripple currents to get to the BEC. But, that just means the lipos were poorly chosen for the application to begin with even if the BEC survives. But to say your lipos need to be capable of whatever the ESC is capable of in a blanket statement is just plain ridiculous. Of course, it won't hurt to do that, but it's just not needed in all but the most severe setups. And since the MMM can really handle bursts well over 200A, does that mean the batteries do too? Without reading mr RURC's posts, it sounds like he knows just enough to sound knowledgable and is convincing others as well.

Again, just give us an Opto MMM and be done with the whole BEC thing.

yeah in a post he said only to buy this one brand(forgot)
i think he works for them...

[Pdelcast]

WELL, nice of everyone to keep everybody else honest. :)


HERE IS THE STATUS of our investigation.

1. It seems to be an infant mortality problem with the switcher control chip, a National Semiconductor LM3485
2. There is already a TVS (transient voltage suppressor) on the circuit that feeds the LM3485 -- so it may NOT be a voltage spike related failure (28V TVS on LM3485 power line, LM3485 part is rated to 36V operational,) but we are not ruling out the possibility at this time.

We are working with National Semiconductor to determine the cause of the failures. It seems that making a couple minor changes to the circuit make everything work fine -- but we haven't determined the cause of the failures yet.

Patrick

[JerryF504]

Originally Posted by Pdelcast

WELL, nice of everyone to keep everybody else honest. :)


HERE IS THE STATUS of our investigation.

1. It seems to be an infant mortality problem with the switcher control chip, a National Semiconductor LM3485
2. There is already a TVS (transient voltage suppressor) on the circuit that feeds the LM3485 -- so it may NOT be a voltage spike related failure (28V TVS on LM3485 power line, LM3485 part is rated to 36V operational,) but we are not ruling out the possibility at this time.

We are working with National Semiconductor to determine the cause of the failures. It seems that making a couple minor changes to the circuit make everything work fine -- but we haven't determined the cause of the failures yet.

Patrick

That's waayyy over my head lol, but I know Castle can and will make it right. Does that mean that it is a problem with all of the ESCs sold so far?

[lutach]

Originally Posted by Pdelcast

WELL, nice of everyone to keep everybody else honest. :)


HERE IS THE STATUS of our investigation.

1. It seems to be an infant mortality problem with the switcher control chip, a National Semiconductor LM3485
2. There is already a TVS (transient voltage suppressor) on the circuit that feeds the LM3485 -- so it may NOT be a voltage spike related failure (28V TVS on LM3485 power line, LM3485 part is rated to 36V operational,) but we are not ruling out the possibility at this time.

We are working with National Semiconductor to determine the cause of the failures. It seems that making a couple minor changes to the circuit make everything work fine -- but we haven't determined the cause of the failures yet.

Patrick

It might just be some faulty units. I see that a lot in the electronic industry. Your failure rate is for a new product is not bad at all. Big electronic companies would love to see that kind of failure rate for their new designs.

[skellyo]

Originally Posted by Pdelcast

WELL, nice of everyone to keep everybody else honest. :)


HERE IS THE STATUS of our investigation.

1. It seems to be an infant mortality problem with the switcher control chip, a National Semiconductor LM3485
2. There is already a TVS (transient voltage suppressor) on the circuit that feeds the LM3485 -- so it may NOT be a voltage spike related failure (28V TVS on LM3485 power line, LM3485 part is rated to 36V operational,) but we are not ruling out the possibility at this time.

We are working with National Semiconductor to determine the cause of the failures. It seems that making a couple minor changes to the circuit make everything work fine -- but we haven't determined the cause of the failures yet.

Patrick

Thanks for the information Patrick. I just have a hard time swallowing information from someone other than those who actually work at Castle. It's one thing for someone to speculate upon the failures, but it's entirely another for one to dissemenate information about failures from Castle as a 2nd hand source. If indeed someone at Castle is speaking with RURC regarding these failures, you guys should keep an eye on how your PR looks with someone like him speaking like he works for you. However, if he's just some crackpot trying to solve the world's problems, then you guys really should make it known that he is not affiliated with your company because he's really not giving anyone warm fuzzies about the whole situation.