1. This product is a drive module designed for sensorless BLDC motors. The main control chip is the SNR8503M. The core integrates a dedicated circuit for driving inductive motors, featuring a simple peripheral circuit, comprehensive functionality, compact size, easy debugging, drive efficiency, flexible application, and wide usability. 2. The SNR8503M is a 32bit core MCU that is easy to develop and debug. To facilitate rapid implementation of sensorless BLDC motor drives, the core algorithm layer of the software has been completed. Users only need to perform secondary development based on this software to quickly complete product development. 3. Features: Forward/reverse switching, stop braking, LED motor status indication, PWM speed control, MOS poweron selftest, MOS overtemperature protection (>95°C), lock protection, overcurrent protection (max. 50A), overvoltage/undervoltage protection, reverse protection, speed control loop, closedloop reverse wind start, and shutdown braking. 4. Builtin LED indicators for standby, operation, errors, etc. The builtin CW/CCW steering interface operates clockwise when open and counterclockwise when shorted to GND.