DRV10975 Datasheet, PDF (1/57 Pages) Texas Instruments – 12-V, Three-Phase, Sensorless BLDC Motor Driver

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DRV10975
SLVSCP2 – JANUARY 2015
DRV10975 12-V, Three-Phase, Sensorless BLDC Motor Driver
1 Features
•1 Input Voltage Range: 6.5 to 18 V
• Total Driver H + L Rdson: <1 Ω
• Drive Current: 1.5 A Continuous (2-A Peak)
• Sensorless Proprietary Back Electromotive Force
(BEMF) Control Scheme
• Continuous Sinusoidal 180° Commutation
• No External Sense Resistor Required
• For Flexibility User may Include External Sense
Resistor to Monitor Power Delivered to the Motor
• Flexible User Interface Options:
– I²C Interface: Access Registers for Command
and Feedback
– Dedicated SPEED Pin: Accepts Either Analog
or PWM Input
– Dedicated FG Pin: Provides TACH Feedback
– Spin Up Profile can be Customized With
EEPROM
– Forward/Reverse Control With DIR Pin
• Integrated Buck/Linear Converter to Efficiently
Provide Voltage (5 V/3.3 V) for Internal and
External Circuits
• Supply Current 4.5 mA With Standby Version
(DRV10975)
• Supply Current 80 μA With Sleep Version
(DRV10975Z)
• Overcurrent Protection
• Lock Detection
• Voltage Surge Protection
• UVLO Protection
• Thermal Shutdown Protection
• Thermally-Enhanced 24-Pin HTSSOP
2 Applications
• Appliance Fan
• HVAC
3 Description
DRV10975 is a three-phase sensorless motor driver
with integrated power MOSFETs, which can provide
continuous drive current up to 1.5 A. The device is
specifically designed for cost-sensitive, low-noise/low
external component count applications.
The DRV10975 uses a proprietary sensorless control
scheme to provide continuous sinusoidal drive, which
significantly reduces the pure tone acoustics that
typically occur as a result of commutation. The
interface to the device is designed to be simple and
flexible. The motor can be controlled directly through
PWM, analog, or I²C inputs. Motor speed feedback is
available through either the FG pin or I²C.
The DRV10975 features an integrated buck/linear
regulator to efficiently step down the supply voltage to
either 5 or 3.3 V for powering both internal and
external circuits. The device is available in either a
sleep mode or a standby mode version to conserve
power when the motor is not running. The standby
mode (4.5-mA) version leaves the regulator running
and the sleep mode (80-µA) version shuts it off. Use
the standby mode version in applications where the
regulator is used to power an external microcontroller.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
DRV10975
HTSSOP (24)
7.80 mm × 6.40 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Application Schematic
0.1 µF
1 VCP
3.3 V/5 V
0.1 µF ^{2 CPP}
3 CPN
39
4 SW
5 SWGND
1 µF
6 VREG
7 V1P8
1 µF
8 GND
9 V3P3
10 SCL
11 SDA
Interface to
12 FG
Configuration
VCC 24
VCC 23
W 22
W 21
V 20
V 19
U 18
U 17
PGND 16
PGND 15
DIR 14
SPEED 13
VCC
10 µF
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.