The motor driver interprets standard logic levels (High/Low) to dictate motor direction and speed. Pulse Width Modulation (PWM) can be applied to the input pins to vary the speed. Input 1 (IN1) Input 2 (IN2) Output 1 (OUT1) Output 2 (OUT2) Motor Status Low Coast / Stop High Low Low High High High 🛠️ Circuit Application and Design Tips
The MX1616’s two H‑bridges can also drive a 4‑wire bipolar stepper motor. Connect one stepper coil to OUTA1/OUTA2 and the other to OUTB1/OUTB2. Then sequence the inputs according to the stepping table (full step, half step, etc.). Because the MX1616 has no built‑in micro‑stepping or current control, it is best suited for simple full‑step or half‑step applications. Popular projects (like small 3D printer filament sensors, camera sliders, or toy robots) have used this configuration successfully.
The MX1616 is a miniature dual-channel brushed DC motor driver designed for low-voltage applications. It is often found in small modules labeled as "HW-166" or similar, making it a go-to solution for hobbyists using Arduino, Raspberry Pi, or ESP32 to drive small toy motors or mini robotic platforms. Mx1616 Motor Driver Datasheet
The IC is typically housed in an SOP-16 package, allowing for a very small footprint on a PCB. MX1616 Motor Driver Datasheet Specifications
| Parameter | Symbol | Min | Max | Unit | | :--- | :--- | :--- | :--- | :--- | | Motor Power Supply Voltage | VM | -0.3 | 13.5 | V | | Control Logic Voltage | VCC | -0.3 | 6.0 | V | | Output Current (DC) | I_OUT | - | 1.6 | A | | Peak Output Current | I_PEAK | - | 3.2 | A | | Operating Temperature | T_opr | -20 | 85 | °C | | Storage Temperature | T_stg | -40 | 150 | °C | The motor driver interprets standard logic levels (High/Low)
Show you with the MX1616.
| Register Address | Function | Bits | | :--- | :--- | :--- | | 0x00 | Generic Status | Overcurrent, Overtemp | | 0x01 | Current Control | Torque DAC setting (0-31) | | 0x02 | Decay Mode | Slow, Fast, Mixed ratio | | 0x03 | Blanking Time | 1.0µs to 3.75µs | Connect one stepper coil to OUTA1/OUTA2 and the
| Symptom | Likely Cause | Fix | |---------|--------------|-----| | Motor jerks, IC hot | Exceeding current limit | Reduce PWM frequency to <20kHz, add heatsink | | No movement, IC cool | Missing ground connection | Check GND pin continuity | | One motor always on | Floating input pin | Add 10k pull-down resistors on IN1/IN2 | | IC resets randomly | Power supply ripple | Increase bulk capacitance to 470µF |
| Input A (IN1) | Input B (IN2) | OUT1 vs OUT2 | Mode | |---------------|---------------|---------------|-----------------------| | 0 | 0 | High-Z / Floating | Coast / Standby | | 0 | 1 | OUT1 = L, OUT2 = H | Reverse (Motor CCW) | | 1 | 0 | OUT1 = H, OUT2 = L | Forward (Motor CW) | | 1 | 1 | OUT1 = L, OUT2 = L | Brake (Low-side short) |
Depending on the specific manufacturer variant module, ground (GND) is shared via common logic lines or an exposed thermal pad. Always verify your specific module's layout. 4. Control Logic Truth Table