No code, no setup—this three-phase fan driver IC enables BLDC control with sensorless operation, faster design, and support for fan and motor systems.
Melexis has introduced the MLX80339, a code-free three-phase fan driver IC for BLDC motor control. It uses pre-validated motor control logic that can be set through an interface, so no software development is needed.
The IC addresses a trade-off in sensorless motor systems used in consumer, industrial, and automotive applications. Single-coil drivers are low cost but face issues with efficiency and noise. Three-phase solutions perform better but need more integration and development time.
The MLX80339 combines three-phase control with a simple setup. Its built-in logic lets engineers build motor control systems without writing code or needing deep motor control knowledge.
Setup is done using the Start-to-Run tool, which generates configuration parameters for motor startup and operation. With the evaluation kit and Melexis Compact Master, designs can be set up in minutes. Since the control logic is already validated, engineers can focus on system checks and reduce development time.
The device supports sensorless operation and low-noise performance. It handles up to 20 W at 12 V and 40 W at 24 V, with current limit up to 3 A. It also includes protection features like under- and overvoltage, overcurrent, and over-temperature.
It comes in an SO8-EP package and targets fan and motor applications such as cooling fans, ceiling fans, automotive seat ventilation, pumps, and actuators. It works from 6 V to 26 V and supports −40 °C to 125 °C.
For compatibility, the MLX80339 supports PWM-based fan control. It also includes UART and I²C interfaces for diagnostics and multi-fan control.
“With the MLX80339, we are making three-phase fan control accessible to more users,” said Marc Lambrechts, Product Line Director at Melexis. “The combination of pre-validated motor control logic, code-free setup, and performance helps engineers move faster while delivering cost-effective, quieter, and more efficient products. This helps expand motor control to more markets.”
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