1 Features
1• 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

2 Applications
• Appliance Cooling Fan
• Desktop Cooling Fan
• Server Cooling Fan

3 Description
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.