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File 01 · 4-in-1 ESC
An ESC (or 4)
6 mosfets per motor, 2 for each phase. Driven by a gate driver, controlled by a microcontroller. Duplicate that 4 times et voila, 'An ESC'.
Model· pick your build
€75.00
SKU OPENESC-3030incl. VAT · excl. shipping01Teardown
Isn't it beautiful?
ESCs have to carry a lot of current so optimized power routing matters. You can see it right here or check the interactive KiCad viewer. Each AT32 microcontroller is running AM32. A large array of low-ESR, high-capacitance ceramic capacitors feeds the fast switching of the MOSFETs to reduce voltage spikes. TVS diodes clamp any spikes that still get too high.
- ①AT32F421 MCU×4
- ②NSG2065Q gate driver×4
- ③Low Rds(on) MOSFET×24
- ④INA186A3 high-side current sense×1
02Open for learning
Published so you can study it. Produced so you don't have to.
03In the box
Everything that ships, down to the grommet.
Here is the actual parts list. Anything missing from a build, say so and we'll ship it.
- 1×OpenESC
- 2×8-pin JST cable
- 1×XT battery pigtail
- 4×M3 grommets
- 1×Low-ESR Electrolytic Capacitor
Provenance
- DesignedLeuven, Belgium · schematic, PCB, BOM, firmware partnerships
- AssembledShenzhen, China · first runs, while we bring up an EU line
- NextEU assembly · in planning
04The €1
What you pay, what the people who wrote the firmware get.
€74.00
€1.00
€75.00
€74 for the board.
€1 for the AM32 ↗ maintainers.
05Datasheet
Every spec, in one table.
- Firmware
- AM32
- Protocol
- DShot · bidirectional DShot telemetry · PWM
- Input
- 3–6S LiPo (11.1–25.2 V)
- MCU
- AT32F421G8U7, 120 MHz
- Gate driver
- NSG2065Q (QFN-24)
- Current sense
- INA186A3 + 2× 0.2 mΩ shunt · 10 mV/A, 330 A full-scale
- Power rails
- LMR54406DBVR buck + TLV76733 LDO
- Connector
- JST SM08B-SRSS-TB (8-pin BF)
- License
- CERN-OHL-S-2.0
- Continuous
- 50 A / channel (preliminary, bench characterization pending)
- MOSFETs
- SP40N01GHNK, 40 V / 1.2 mΩ
- PCB
- 6-layer, 30×30 mount
