Integrated small brushless direct current motor

The utility model discloses an integrated small-sized brushless direct current motor, which comprises a shell, a motor, a circuit board, a control chip and a small-sized alternating current-direct current conversion system, a motor is fixedly installed in the shell, and an output shaft of the motor extends out of the shell. The circuit board is fixedly installed in the shell and connected to a motor body of the motor in a sleeving mode. The circuit board is fixedly connected with a power supply; the control chip is integrated on the circuit board, an integrated circuit is arranged in the control chip, and the integrated circuit is electrically connected with the motor; the miniaturized AC-DC conversion system is integrated on the circuit board and is electrically connected with the power supply. According to the utility model, the circuit board is connected with the power supply, the integrated circuit is arranged in the single control chip, and the miniaturized AC-DC conversion system and the control chip ar