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The B-G431B-ESC1 Discovery kit is based on the STM32G431CB microcontroller, the L6387 driver and STL180N6F7 power MOSFETs. It is composed of a main power board, and a daughterboard with embedded ST-LINK/V2-1. It is an electronic speed controller (ESC), designed to drive a single 3-phase brushless motor (BLDC/PMSM), performing both sensorless FOC algorithm and 6-step control with a speed regulation, and an active braking function algorithm. The ST sensorless FOC algorithm ensures longer flight times and an optimal dynamic performance. This unit accepts command signal from an external unit for driving and monitoring, for instance a flight control board or equivalent. For this purpose, several communication bus interfaces (UART, CAN, PWM channel) are present. A potentiometer and a user button are available for user application. The daughterboard includes a 5 V battery eliminator circuit (BEC), and the main board embeds an overcurrent/overvoltage and thermal protection circuit. The form factor makes it suitable for small and very light R/C vehicles (FPV race drone) and the motor current capability fits the power requirement of big vehicles, for instance a prosumer drone.
Key Features
- Full reference design for electronic speed controller capable of both sensorless FOC and 6-step algorithm
- Designed for drones with up to 6S LiPo battery pack or equivalent suitable DC supply
- 3-phase driver board for BLDC/PMSM motors with discrete N-channel 60Â V, 120Â A STripFET F7 power MOSFETs
- STM32G431CB Arm® Cortex®-M4 32-bit MCU, 213 DMIPS, 128 Kbytes of Flash memory, 32 Kbytes of SRAM, analog rich, math accelerator
- On-board ST-LINK/V2-1 debugger/programmer detachable from the main board
- Output peak motor current (maximum peak current tested with propeller to have an air-forced cooling): 40Â A
- Designed with SMD ceramic capacitors with very low profile
- BEC available through the daughterboard (5Â V for external board supply, for example a flight control board)
- Support for motor sensors (Hall or encoder)
- Supported by ST Motor Control Software Development Kit (SDK) with ST Motor profiler
- 3-shunt mode supported for motor current sensing
- L6387 High voltage high and low-side driver with integrated interlocking function
- Overcurrent and overvoltage protection feature (OCP/OVP)
- Thermal measuring and overheating protection with NTC on board
- ESC ready for communication with any standard flight control unit (FCU): PWM/CAN/UART
- Potentiometer and user button available on daughterboard
- Two user LEDs: one green LED for 3.3Â V level, and one red LED configurable by the user
- Target applications: motor driving for R/C vehicles, UAV drone, electric car or boat
- PCB type and size:
- FR-4 PCB material
- 8-layer layout
- Dimensions (including the daughterboard with ST-LINK part): 30 mm × 41 mm
- Weight (including the daughterboard with ST-LINK part): 9.2Â g
- RoHS compliant
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)* | Quantity | Specific features | ECCN (US) | Country of Origin | WEEE Compliant | Order from Distributors | Order from ST |
|---|---|---|---|---|---|---|---|---|---|
| B-G431B-ESC1 |
Active
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18 | 1 | - | 3A991A2 | - | true | Check Availability |
B-G431B-ESC1
Marketing Status
ActiveUnit Price (US$)
18Unit Price (US$)
18.0*(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors
Featured Videos
The STM32G4 Series combines a 32-bit Arm® Cortex®-M4 core (with FPU and DSP instructions) running at 170 MHz combined with 3 different hardware accelerators: ART Accelerator™, CCM-SRAM routine booster and mathematical accelerators.
Development Tools
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Picture Part number Manufacturer Description ST-LINK-SERVER ST ST-LINK server software module 
ST-MC-SUITE ST Online Motor Control solution finder for STM32 and STM8 products STSW-LINK007 ST ST-LINK, ST-LINK/V2, ST-LINK/V2-1, STLINK-V3 boards firmware upgrade STSW-LINK009 ST ST-LINK, ST-LINK/V2, ST-LINK/V2-1 USB driver signed for Windows7, Windows8, Windows10 Part NumberST-LINK server software module
Online Motor Control solution finder for STM32 and STM8 products
ST-LINK, ST-LINK/V2, ST-LINK/V2-1, STLINK-V3 boards firmware upgrade
ST-LINK, ST-LINK/V2, ST-LINK/V2-1 USB driver signed for Windows7, Windows8, Windows10
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Embedded Software
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Picture Part number Manufacturer Description 
STM32CubeG4 ST STM32Cube MCU Package for STM32G4 series (HAL, Low-Layer APIs and CMSIS (CORE, DSP, RTOS), USB, File system, RTOS, Graphic - coming with examples running on ST boards: STM32 Nucleo, Discovery kits and Evaluation boards) 
X-CUBE-MCSDK ST STM32 Motor Control Software Development Kit (MCSDK) Part NumberSTM32Cube MCU Package for STM32G4 series (HAL, Low-Layer APIs and CMSIS (CORE, DSP, RTOS), USB, File system, RTOS, Graphic - coming with examples running on ST boards: STM32 Nucleo, Discovery kits and Evaluation boards)
STM32 Motor Control Software Development Kit (MCSDK)
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| Part Number | Marketing Status | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|
| B-G431B-ESC1 |
Active
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Ecopack1 |
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B-G431B-ESC1
Package:
Ecopack1Material Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
