The DMD808 and DMD808A are stepper motor micro‑step drivers developed by Leatro, featuring a high‑performance bipolar constant‑current chopper with a 20 kHz chopping frequency and a maximum drive current of 7.7 A per phase. They support up to 256 micro‑steps, optical isolation for signal inputs, and a dual‑pulse input function, making them suitable for a variety of CNC, laser marking, medical, welding and other automation equipment.
The manual covers mechanical installation dimensions, operating environment limits, electrical characteristics, DIP‑switch configuration for micro‑stepping and current settings, pin assignments, motor wiring for 4‑, 6‑ and 8‑wire stepper motors, protection functions (over‑voltage, short‑circuit, phase‑error), and interface circuit diagrams. It also provides guidance on power supply selection and system integration. This manual is written in Chinese.
| Maximum drive current (peak per phase) | 7.7 A |
|---|---|
| Chopping frequency | 20 kHz |
| Maximum micro‑step resolution | 256 |
| Supply voltage range | 24 V – 90 V DC |
| Output current range (peak) | 2.8 A – 7.7 A |
| Logic input current | 6 – 10 mA (typical) |
| Step pulse frequency | 0 – 200 kHz |
| Insulation resistance | 500 MΩ |
| Operating temperature range | -20 °C – +65 °C |
| Ambient temperature range | 0 °C – +50 °C |
| Maximum humidity | ≤90 % RH |
| Maximum vibration | 5.9 m/s² |
The micro‑stepping resolution is set with the 5‑ to 8‑bit DIP switches; after changing the switches the driver must be powered off and on again.
The driver operates with a DC supply voltage between 24 V and 90 V.