摘要：作为其他复杂的步进电机驱动电路的替代方法，这种方法采用了一个小小的，表面贴装的2.8W D类音频放大器，通常驱动4W或8W扬声器。两个内置H桥驱动器输出的双OUTR ± ± OUTL ，直接连接A和B的步进电机绕组。每对带有一个1.22MHz的标称中心频率的PWM信号差Maxim > App Notes > Amplifier and Comparator Circuits Keywords: stepper motors, H bridge, class D amplifiers, differential PWM Oct 26, 2009 APPLICATION NOTE 4469 Bipolar Stepper-Motor Driver has Few Components By: Phill Leyva, Bill Quach Abstract: As an alternative to the otherwise complex driver circuit for a stepper motor, this approach employs a tiny, surface-mount 2.8W class D audio amplifier that normally drives 4W or 8W speakers. Two internal H- bridges drive the output pairs OUTR± and OUTL±, which connect directly to the A and B windings of the stepper motor. Each pair carries a differential PWM signal with a nominal center frequency of 1.22MHz. This design idea appeared in the December 1, 2006 issue of EDN magazine. Bipolar, monofilar-winding steppe……