Kit configuration suitable for small devices using 6S LiPo batteries

STMicroelectronics announced that it has expanded support for the STM32G4 microcontroller by adding new firmware examples to the latest STM32CubeG4 software package (v 1.1.0) and providing a digital power and motor control Discovery Kit.

This enables users to accelerate the design of digital power supplies and motor controls in applications such as competition drones, prosumer drones, and small electric vehicles.


The Discovery Kit B-G474E-DPOW1 is a complete digital power platform featuring the STM32G474RE MCU, a buck-boost converter with onboard resistive loads, a high-brightness RGB LED controller for lighting power designs, user LEDs and buttons, flexible power and data connectivity, and debugging support.

Users can utilize the FMAC (Fielder-Math Accelerator) of this MCU to handle functions such as 3p/3z compensation and digital slope compensation, which provides high efficiency across a load range and reduces the CPU cycle burden of applications such as lighting.

The Discovery Kit B-G431B-ESC1 is a complete Electronic Speed Control (ESC) reference design suitable for 3-phase brushless BLDC and PMSM motors up to 40A. It includes a 3-phase motor driver stage equipped with an STM32G431CB MCU and a STripFET F7 power MOSFET to handle sensorless FOC (Field-Oriented Control) or 6-stage rectification.

Onboard features include electrical and overheating protection, interlocking high-side/low-side drivers, as well as support for motor sensors and 3-shunt current sensing. Its compact form factor allows the STLINK daughter board to be detached and used directly as a controller for the application.

This kit is supported by the X-CUBE-MCSDK v5.4.1 motor control SDK and is intended for wirelessly controlled vehicles, small electric vehicles, and drones powered by up to 6S LiPo battery packs.

The STM32G4 series adds a new package to the STM32 portfolio. The 128-pin 14x14 LQFP is the first package in the STM32G4 series to consist of more than 100 pins, allowing for more flexible handling of I/O-intensive tasks within the same footprint as the current LQFP100 package.

The STM32G4 MCU provides powerful capabilities for motor control, digital power, and measurement applications across consumer and industrial sectors through rich analog functions, high-resolution timers, dual-bank flash for secure real-time firmware upgrades, low power consumption in dynamic mode (160µA/MHz), and (ambient) temperature options up to 125°C.

This powerful MCU series features a 170MHz Arm® Cortex®-M4F core and unrivaled innovative technologies such as ST’s Adaptive Real-time ART Accelerator™ and CCM-SRAM Routine Booster, as well as new FMAC and triangular CORDIC hardware accelerators, to efficiently allocate power and deliver exceptional real-time performance across applications.