12-V, 3-Phase Sensorless BLDC Motor Controller - DRV11873


12-V, 3-Phase Sensorless BLDC Motor Controller


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 low noise and low external component count fan motor drive applications. DRV11873 has built in over current 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 V 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
  • PWMIN Input From 15 kHz to 100 kHz
  • Over Current Protection With Adjustable Limit Through External Resistor
  • Lock Detection
  • Voltage Surge Protection
  • UVLO
  • Thermal Shutdown

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Parametrics Compare all products in 3-Phase Brushless Driver

Vs (Min) (V)
Vs (Max) (V)
RMS Output Current (A)
Peak Output Current (A)
RDS(ON) (HS + LS) (mOhms)
# of half-bridges
Control I/F
Additional Features
Operating Temperature Range (C)
Approx. Price (US$)
DRV11873 DRV10983
5     8    
16     28    
1.5     2    
2     3    
450     250    
3     3    
PWM     PWM, Analog, or I2C    
20mA 5V LDO; Rotor Lock Protection     100mA Step Down Buck; Rotor Lock Protection    
Catalog     Catalog    
-40 to 85     -40 to 125    
16HTSSOP     24HTSSOP    
0.79 | 1ku     1.19 | 1ku    

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