BLDC Traction Motor Drive

The combination of a high-performance MCU and a 3-phase smart driver delivers optimal processing speed and power efficiency, catering to traction motors with small form factor limitations and varied power requirements. The integrated power management allows the driver and MCU to be powered directly from the battery, reducing overall circuitry. Programmability enables customers to optimize the inverter power stage for different power levels by adjusting MOSFETs and tuning slew rate, dead time, and gate drive via software. By using two inductive position sensors, customers can replace large, costly optical encoders. These sensors provide absolute position information and incremental position sensing with up to 17 bits of resolution, utilizing the MCU's advanced ADC capabilities.

System Benefits​:

• Both the MCU and 3-phase driver are available in 7mm x 7mm 48-pin QFN packages, ideal for small form factor applications.
• Includes power management and a power driver, allowing the MCU to be powered directly from the battery.
• Supports motor sensing modes, dead time, slew rate, and gate drive voltage adjustments for optimal inverter tuning.
• Offers optimized current vector control and filter operations, reducing the load on the main CPU core for additional functions.
• Two inductive position sensors provide absolute and incremental rotor position.
• Designed to minimize the overall BOM cost, reduce size, and replace bulky, expensive optical encoders.