DRV11873 20W, 12V 3-phase sensorless BLDC motor driver | TI.com


20W, 12V 3-phase sensorless BLDC motor driver

20W, 12V 3-phase sensorless BLDC motor driver  - DRV11873


DRV11873 is a three-phase, sensorless motor driver with integrated power MOSFETs with drive current capability up to 1.5-A continuous and 2-A peak. DRV11873 is specifically designed for fan motor drive applications with low noise and low external component count. DRV11873 has built-in overcurrent protection with no external current sense resistor needed. The synchronous rectification mode of operation achieves increased efficiency for motor driver applications. DRV11873 outputs FG and RD to indicate motor status with open-drain output. A 150° sensorless BEMF control scheme is implemented for a three-phase motor. DRV11873 is available in the thermally-efficient 16-pin TSSOP package. The operation temperature is specified from –40°C to 125°C.


  • Input Voltage Range: 5 to 16 V
  • Six Integrated MOSFETs With 1.5-A Continuous
    Output Current
  • Total Driver H + L RDSON 450 mΩ
  • Sensorless Proprietary BMEF Control Scheme
  • 150° Commutation
  • Synchronous Rectification PWM Operation
  • FG and RD Open-Drain Output
  • 5-V LDO for External Use up to 20 mA
  • PWMIN Input from 7 to 100 kHz
  • Overcurrent Protection With Adjustable Limit
    Through External Resistor
  • Lock Detection
  • Voltage Surge Protection
  • UVLO
  • Thermal Shutdown

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Parametrics Compare all products in Brushless DC Drivers with FETs

Vs (Min) (V)
Vs (Max) (V)
RMS Output Current (A)
Peak Output Current (A)
RDS(ON) (HS + LS) (mOhms)
Number of Half Bridges
Control I/F
Operating Temperature Range (C)
DRV11873 DRV10970 DRV10975
5     5     6.5    
16     18     18    
1.5     1     1.5    
2     1.5     2    
450     400     250    
3     3     3    
PWM     PWM     PWM, Analog, or I2C    
20mA 5V LDO
Rotor Lock Protection    
180 Degree Sinusoidal Commutation
Adaptive Drive Angle Adjustment (ADAA)
Hall Sensor Flexibility
Full Protection Suite    
180 Degree Sinusoidal Commutation
100mA Step Down Buck
Rotor Lock Protection    
Catalog     Catalog     Catalog    
-40 to 85     -40 to 125     -40 to 125