You say this, but you still havenât fulfilled the dress order for my Barbies.
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If you do that, then only the DRV. The CPU/MCU definitely for sure needs no heatsink.
If youâre not drawing on the +5V line any more than a radio receiver you probably donât even need to cool the DRV.
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Since neither have an exposed pad on top youâll be fine using the same heat sink. You only have to worry about that sort of thing when the components youâre trying to heatsink have thermal pads that are also electrical pads, such as the power mosfets.
Plus, thermal pads donât conduct electricity unless you buy some whip-shit graphite-filled unicorn-poop ones.
The MCU dissipates essentially zero heat. Not worth that.
The DRV has a big thermal copper pour soldered to the pad on the bottom - thatâs much more effective than a thermal pad on top of the plastic case.
The biggest generators of heat in a vesc are the FETs, the current shunts, the DRV, and maybe the voltage regulator(s) if youâre drawing power for external electronics.
TLDR, you wonât break anything but it wonât net you any performance gains.
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Bill I told you we donât stock cotton candy pink I canât complete your order 
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Thank you very much! Maybe Iâll undertake the task 
Depends on how bored I am that day, I guess
Could you expand on this? Curious what you mean.
May I humbly suggest you tinker with something maybe a little more visible and less mission-critical, if youâre just tinkering for tinkeringâs sake? Like your deck? Wheels? Lights? Trucks? Remote? Motors?
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The DRV has a DC-DC converter built in that feeds the 5v rail. So if you draw extra power for other stuff, itâll get hotter.
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has anyone found something similar to this? i canât find it anywhere else than on EBS website
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Theyâre fantastic for waterproofing but generally a little bulky. Iâve got a handful on my ebike.
And you can get them from a lot of places in a lot of different flavors - Nylon, zinc, stainless steel, extra features, etc.
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Things are so close to fitting together for the build thereâs really almost nothing else to do đ¤ˇ
I just have to conformal coat my Focboxes, but Iâm waiting for my esc enclosure to cutout the heatsink before I do that. Iâm so close to riding again x_x
lucky.
i am months awayâŚ
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Then why not concentrate on things that are going to get you up and riding, instead of fucking with that which doesnât need to be fucked with? (I am speaking from experience here. My bike is a huge pile of delays for this very reason right now.)
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Well, same⌠When the snow comes down in upstate NY its nuts.
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I actually didnât realize this was where the 5v rail was coming from on these. TIL!
Iâve never seen mine getting particularly warm in comparison to my fets though personally, checked on FLiR.
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Itâs usually fine, unless you load it down with fairly hefty external power draws like a string of ws2812 LEDs, for example. IIRC the rail is good for 5V 1A. (and the internal vesc draw is pretty minimal - just the MCU via a 3.3v regulator, and a couple other small chips.)
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Yeah I guess from a design standpoint using that as a user-accessible power rail is convenient but not necessarily the safest design.
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Yup. The DRV is a really neat chip - an all-in-one gate driver, DC-DC converter, and current shunt amplifier.
Too bad they like to go POOF so readily though.
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I agree. I believe the manufacturer rates that at 1.8A max minus whatever the MCU and radio receiver are using. But Iâd feel much safer not loading that up with bling⌠I use external buck converters for that stuff.
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Search for PG cable glands. Normally PG21 would indicate maximum cable diameter of 21mm could be passed.