The demo for the air purifier is based on a commercial product and implemented by NM1244. NM1244 integrates numerous popular functions used in motor control, such as OPA/ ACMP/ DAC. As a result, it helps users save the PCB space, lower the BOM cost, and tuning. Furthermore, users can quickly transfer the software/hardware to their product based on the demo system

• Features
  

  -	24V/ 2.5A/ 50W
  -	Supports direct input/ VSP
  -	Speed control with 1-R FOC
  -	No extra OPA/ACMP needed
  -	12-bit DAC provides high resolution   for negative input of ACMP
  -	No extra gate driver IC needed
  -	OC/ OV/ LV/ Block protection

• Specifications
  

  NM1244 (32-bit Arm® Cortex®-M0)
  -	Up to 60 MHz operating frequency
  -	Operating voltage: 2.5V to 5.5V
  -	High immunity: 4 kV EFT
  -	Operating temperature: -40℃ to 105℃
  -	OPA/ ACMP/ DAC inside
  -	Two sets of 12-bit ADC with 20 channels
  -	Power down current: 1 μA
  -	High I/O sink current capability

• System Block Diagram