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DRV11873PWPR
12-V, 3-Phase Sensor-Less BLDC Motor Controller
GND
VCP
CPN VCC U
PWMIN
CPP V5
COM 9
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DRV11873SLWS237A –NOVEMBER 2012–REVISED NOVEMBER 2014
DRV11873 12-V, 3-Phase, Sensorless BLDC Motor Driver Features 3 DescriptionDRV11873isa three-phase, sensorless motor driver Input Voltage Range:5to16V with integrated power MOSFETs with drive current• Six Integrated MOSFETs With 1.5-A Continuous capability up to 1.5-A continuous and 2-A peak.Output Current DRV11873is specifically designed for fan motor drive Total DriverH+L RDSON 450 mΩ applications with low noise and low external
component count. DRV11873 has built-in overcurrent• Sensorless Proprietary BMEF Control Scheme protection with no external current sense resistor• 150° Commutation needed. The synchronous rectification mode of• Synchronous Rectification PWM Operation operation achieves increased efficiency for motor
driver applications. DRV11873 outputs FG and RDto• FG and RD Open-Drain Output
indicate motor status with open-drain output.A 150°• 5-V LDOfor External Useupto20 mA sensorless BEMF control schemeis implemented for• PWMIN Input from7to 100 kHz a three-phase motor. DRV11873is availablein the Overcurrent Protection With Adjustable Limit thermally-efficient 16-pin TSSOP package. The
operation temperatureis specified from –40°C toThrough External Resistor
125°C.• Lock Detection Voltage Surge Protection
Device Information(1) UVLO Thermal Shutdown
(1) Forall available packages, see the orderable addendumat
2 Applications the endofthe data sheet. Appliance Cooling Fan Desktop Cooling Fan Server Cooling Fan
Simplified Schematic
