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Independent external power for VESC 6 MK3?

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henry10210
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Independent external power for VESC 6 MK3?

Hi, I am trying to use the VESC 6 MK3 as a BMS (as well as an ESC), and it occurs to me that the VESC MCU and the sensors would have to be supplied by something other than the main battery.  But according to the schematic, every active component--including the MCU--seems to be supplied VCC, which I would guess is stepped down from the main battery voltage?  Can someone please confirm my understanding?

Thanks for reading,

Henry

TheFallen
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As a BMS? How do you mean? Could you give me some more information here, sketches/schematics are fine.

Depending on which schematic you're operating from, VCC is +3V3 which is supplied by a linear voltage regulator from the +5V supply provided by the built in switch mode power supply inside the DRV chip. The +3V3 & +5V supplies are mainly for the internals rather than external extras, over loading these supplies will cause the VESC to have a bad time, or even die. For your BMS project I'd recommend a separate power supply source.