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通过脉宽调制 (PWM) 控制两个直流电动机,A4954 能够承受峰值输出电流达 ±2 安培,并使电压达到 40 伏特。
输入端通过应用外部 PWM 控制信号以控制直流电动机的速度与方向。内部同步整流控制电路用来降低脉宽调制 (PWM) 操作时的功率消耗。
内部电路保护包括过电流保护、电动机接地或电源短路、因滞后引起的过热关机、VBB 欠压监视以及交叉电流保护。
A4954 采用带有外置散热板的 16 引脚 TSSOP 小型封装(后缀 LP)。该封装为无铅封装,且引脚框采用 100% 雾锡电镀。