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OpenESC-30x30 Rev 3

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@Just4Stan Just4Stan released this 12 Aug 07:26
· 27 commits to main since this release
rev3
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Learn about vigilant mode.

4-in-1 BLDC ESC, 30.5 x 30.5 mm mounting, 6-layer. Four independent AT32F421G8U7 controllers on AM32. Input range moves to 3S-8S.

Version numbering jumps rev1 to rev3 to align with the rest of the line. There is no rev2 tag for this board.

8S rating

The 3x SMBJ24A input TVS are removed. Their 24 V standoff sits below the 33.6 V a full 8S pack reaches, so on 8S they would have conducted rather than protected. Worth noting they were already marginal on 6S, where a full pack reaches 25.2 V.

There is no input clamp now. The 3S-8S rating rests on bench and flight testing on 8S rather than on a clamp. The envelope is bounded by:
Power MOSFETs SP40N01GHNK, 40 V VDSS
Gate-drive buck LMR54406DBVR, 36 V rated, 45 V absolute maximum, 50 V for short transients
Current sense ~330 A full-scale

Anyone repurposing this design on 8S should understand that the 40 V FETs sit 6.4 V above a full pack with no clamp, and that the rating comes from measured behaviour rather than from derating headroom.

Also in this revision

JST SM08B-SRSS-TB 3D model fixed in the project library, board images re-rendered.

Assets 2
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