Holtek Launches BD66FM5250 Brushless DC Motor Control MCU

     Holtek introduced the BLDC special microcontroller BD66FM5250 for the field of brushless DC (BLDC) motor control, introduced the back electromotive force filter to make the square wave sensor less start and low speed control more stable, and increased the hardware multiplier and divider to speed up the calculation. Suitable for various square wave and chord wave BLDC motor applications.

     BD66FM5250 has 8K × 16 Flash ROM、2K × 8 RAM、512 × 8 EEPROM and internal system frequency is 20MHz, with 10+1 channels of 12 bit fast A/D converter, and 4 groups of PWM output/input capture function Timer. BLDC motor control circuit provided for BLDC control includes 16 bit speed monitoring Timer, three groups of 10 bit with Dead time complementary PWM output and OCP overcurrent protection function.

     BD66FM5250 can be used for Hall Element or Sensor less position detection through three built-in comparators. The hardware Cycle by Cycle current protection control function can directly set the limit of output current, so that the motor can continue to operate under the maximum protection current. 24SSOP, 28SSOP and 32QFN (4 × 4) Encapsulation. The BD66FM Series BLDC Workshop can speed up the import of products.