Motor Driver. DRV10866 Datasheet

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DRV10866 Datasheet
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Part DRV10866
Description Sensorless BLDC Motor Driver
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Texas Instruments DRV10866
Product
Folder
Sample &
Buy
Technical
Documents
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Software
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DRV10866
SBVS206A – NOVEMBER 2012 – REVISED MARCH 2015
DRV10866 5-V, 3-Phase, Sensorless BLDC Motor Driver
1 Features
1 Input Voltage Range: 1.65 V to 5.5 V
• Six Integrated MOSFETS With 680-mA Peak
Output Current
• Ultralow Quiescent Current: 5 µA (Typical) in
Standby Mode
• Total Driver H+L RDSOn 900 mΩ
• Sensorless Proprietary BMEF Control Scheme
• 150° Commutation
• Synchronous Rectification PWM Operation
• Selectable FG and ½ FG Open-Drain Output
• PWMIN Input from 15 kHz to 50 kHz
• Lock Detection
• Voltage Surge Protection
• UVLO
• Thermal Shutdown
2 Applications
• Notebook CPU Fans
• Game Station CPU Fans
• ASIC Cooling Fans
3 Description
DRV10866 is a 3- phase, sensorless motor driver
with integrated power MOSFETs with drive current
capability up to 680-mA peak. DRV10866 is
specifically designed for low noise and low external
component count fan motor drive applications.
DRV10866 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.
DRV10866 outputs either FG or ½ FG to indicate
motor speed with open-drain output. A 150°
sensorless BEMF control scheme is implemented for
a 3-phase motor. DRV10866 is available in the
thermally efficient 10-pin, 3-mm × 3-mm × 0.75-mm
SON (DSC) package. The operating temperature is
specified from –40°C to 125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV10866
WSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
DRV10866 Typical Application
100 kΩ
1 FG
2 COM
PWM 10
CS 9
3.8 kΩ
PWMIN
VCC
3 VCC
FGS 8
2.2 µF
4U
V7
5 GND
W6
M
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.



Texas Instruments DRV10866
DRV10866
SBVS206A – NOVEMBER 2012 – REVISED MARCH 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 7
7.1 Overview ................................................................... 7
7.2 Functional Block Diagram ......................................... 7
7.3 Feature Description................................................... 8
7.4 Device Functional Modes.......................................... 9
8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10
8.2 Typical Application ................................................. 10
9 Power Supply Recommendations...................... 14
10 Layout................................................................... 14
10.1 Layout Guidelines ................................................. 14
10.2 Layout Example .................................................... 14
11 Device and Documentation Support ................. 15
11.1 Trademarks ........................................................... 15
11.2 Electrostatic Discharge Caution ............................ 15
11.3 Glossary ................................................................ 15
12 Mechanical, Packaging, and Orderable
Information ........................................................... 15
4 Revision History
Changes from Original (November 2012) to Revision A
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section .............................. 1
2 Submit Documentation Feedback
Product Folder Links: DRV10866
Copyright © 2012–2015, Texas Instruments Incorporated



Texas Instruments DRV10866
www.ti.com
5 Pin Configuration and Functions
DRV10866
SBVS206A – NOVEMBER 2012 – REVISED MARCH 2015
10-Pins WSON with Thermal Pad
DSC Package
Top View
FG
COM
VCC
U
GND
1
2
3
4
5
(1)
Thermal Pad
GND
10 PWM
9 CS
8 FGS
7V
6W
(1) Thermal pad connected to ground.
NAME
COM
PIN
NO.
2
CS 9
FG
FGS
GND
PWM
U
V
VCC
W
1
8
5
10
4
7
3
6
Pin Functions
I/O DESCRIPTION
I Motor common terminal input
Overcurrent threshold setup pin. The constant current of the internal constant current source
flows through the resistor connected to this pin. The other side of the resistor is connected to
ground. The voltage across the resistor compares with the voltage converted from the
I bottom MOSFET current. If the MOSFET current is high, the part enters the overcurrent
protection mode by turning off the top PWM MOSFET and holding the bottom MOSFET on. I
(mA) = 3120/RCS(kΩ).
Equation valid range: 300 mA < ILIMIT< 850 mA
Frequency generator output. If the FGS pin is connected to ground, the output has a period
O equal to one electrical cycle (FG). If the FGS pin is connected to VCC, the output has a
period equal to two electrical cycles (1/2FG).
I
FG and 1/2FG control pin. Latched upon wake-up signal from the PWM pin. For details, refer
to Frequency Generator.
— Ground pin
PWM input pin. The PWM input signal is converted to a fixed 156-kHz switching frequency
on the MOSFET driver. The PWM input signal resolution is less than 1%. This pin can also
I
control the device and put it in or out of standby mode. After the signal at the PWM stays low
(up to 500 µs), the device goes into low-power standby mode. Standby current is
approximately 5 µA. The rising edge of the PWM signal wakes up the device and puts it into
active mode, where it is ready to start to turn the motor.
O Phase U output
O Phase V output
I
Input voltage for motor and chip-supply voltage; the internal clamping circuit clamps the VCC
voltage.
O Phase W output
Copyright © 2012–2015, Texas Instruments Incorporated
Product Folder Links: DRV10866
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