Targeting the electronic control system of lithium-battery handheld vacuum cleaners, the solution covers the full chain: battery BMS protection, power conversion, brushless motor drive, and signal sampling. Integrating high- and low-voltage MOSFETs, dedicated BMS lithium-battery protection ICs, power ICs, motor MCUs, op-amps and optocouplers, it delivers safe battery management, efficient power conversion and precise motor speed regulation, optimizing overall power consumption and runtime, and enhancing operational stability.