（ 1 ）转子位置传感器译码电路；

（ 2 ）带温度补偿的内部基准电源；

（ 3 ）频率可设定的锯齿波振荡器；

（ 4 ）误差放大器；

（ 5）脉宽调制（PWM）比较器；

（ 6 ）输出驱动电路；

（ 7 ）欠电压保护芯片过热保护等故障输出；

（ 8 ）限流电路。

该集成电路的典型控制功能包括 PWM 开环速度控制，使能控制（起动或停止），正反转控制和能耗制动控制，适当加上一些外围元件，可实现软起动。

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