DRV11873 Datasheet, PDF (1/16 Pages) Texas Instruments – 12-V, 3-PHASE, SENSORLESS BLDC MOTOR DRIVER

DRV11873
www.ti.com
SLWS237 – NOVEMBER 2012
12-V, 3-PHASE, SENSORLESS BLDC MOTOR DRIVER
Check for Samples: DRV11873
FEATURES
1
• Input Voltage Range 5 V to 16 V
• Six Integrated MOSFETs With 1.5-A
Continuous Output Current
• Total Driver H+L R_DSON 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
• PWM_IN Input From 15 kHz to 100 kHz
• Over Current Protection With Adjustable Limit
Through External Resistor
• Lock Detection
• Voltage Surge Protection
• UVLO
• Thermal Shutdown
APPLICATIONS
• Appliance Cooling Fan
• Desktop Cooling Fan
• Server Cooling Fan
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 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.
TYPICAL APPLICATION
0.1uF
0.1uF
FS ₁
FG ₂
RD ₃
VCP 4
CPP ₅
CPN ₆
W7
GND ₈
PWMIN
16
15 ^FR
14 ^CS
13 COM
2.2uF
12 ^V5
11 ^VCC
U
10
9V
10uF
M
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012, Texas Instruments Incorporated