STEVAL-PTOOL4A

STEVAL-PTOOL4A is a compact, customizable and configurable reference design for battery operated BLDC/PMSM power tools based on STM32G473 and STDRIVE 101. This is a compact system designed to control a brushless DC (BLDC) or a permanent-magnet synchronous motor (PMSM) in application such as a handheld battery-powered tool. It works on the standard set of inputs such as throttle to control the motor torque/speed and to deliver power up to 250W. The board can be connected to a suitable 21 V / 250 W power tool motor. More peak power can be delivered with heatsink or with arrangement for circulating air to achieve better power dissipation. This reference design is ideal for high-performance motor control to realize power tools such as drill machines, grinders, disc cutters, circular saws, leaf blowers, handheld mowers etc. The small form factor and ample computing power make it suitable even for applications such as drones, wheelchairs, home appliances, e-bicycles, and robotic platforms.

• Input voltage from 12 to 28V DC (nominally 21V), output RMS current up to 20A
• STM32G473CET6: A high-performance Arm®-based Cortex®-M4 32-bit MCU+FPU in LQFP48 (7x7mm) package
• STDRIVE101: triple half-bridge gate driver, L6981NDR: 38V, 1.5A synchronous step-down converter
• TSV912IQ2T: dual rail to rail I/P/O/P 8MHz op amp, BAT54KFILM: small signal Schottky diodes (single)
• 2STR2160/2STR1160: low voltage fast switching PNP/NPN power transistor
• Hardware features enabling efficient motor control options: 3 ADC channels for back EMF sensing
• Independent ADCs for 3-phase current sensing through shunts, bus voltage sensing
• Empowered with a feature-rich STM32 motor control ecosystem for PMSM, BLDC
• Wide options for connectivity and user control: SWD port for debugging/programming
• Communication interfaces for SPI, UART, CAN /I2C pins