A3977 带转换器的微步 DMOS 驱动器 特点 ±2.5 A、35 V 输出额定值 低 rDS(开)输出（一般为 0.45 Ω源极，0.36Ω灌电流） 自动检测/选择电流-A3977 DMOS drive characteristics with micro-step converter ± 2.5 A, 35 V output rating of low, rDS (open) output (typically 0.45 Ω source very, 0.36Ω current sink

CNC雕刻机（Stm32驱动A3977控制步进电机）实现控制。我这里还有电路图和上位机软件-CNC engraving machine controlled stepper motor) (Stm32 driver A3977 achieve control. I have here the schematic and PC software