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.