DRV10964 Datasheet, PDF (7/27 Pages) Texas Instruments – Three-Phase Sinusoidal Sensorless BLDC Motor Driver

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7 Detailed Description
DRV10964
SLDS227 – MARCH 2016
7.1 Overview
The DRV10964 device is a three phase sensorless motor driver with integrated power MOSFETs. It is
specifically designed for high efficiency, low noise and low external component count motor drive applications.
The proprietary sensorless windowless 180° sinusoidal control scheme provides ultra-quiet motor operation by
keeping electrically induced torque ripple small.
Upon start-up, the DRV10964 device will spin the motor in the direction indicated by the FR input pin. The
DRV10964 device will operate a three phase BLDC motor using a sinusoidal control scheme. The magnitude of
the applied sinusoidal phase voltages is determined by the duty cycle of the PWM pin. As the motor spins, the
DRV10964 device provides the speed information at the FG pin.
The DRV10964 device contains an intelligent lock detect function. In the case where the motor is stalled by an
external force, the system will detect the lock condition and will take steps to protect itself as well as the motor.
The operation of the lock detect circuit is described in detail in Lock Detection .
The DRV10964 device also contains several internal protection circuits such as overcurrent protection,
overvoltage protection, undervoltage protection, and overtemperature protection.
7.2 Functional Block Diagram
FG
CONFIG
Decode
V_CC
GND
ADC
PWM
FR
FGS
PWM and
WakeUp
Lock
Over Current
Thermal
UVLO
Logic
Core
DRV10964
U
V
V/I Sensor
W
DRV10964
VCC
U
V
W
GND
7.3 Feature Description
7.3.1 Sleep Mode
When the PWM commanded duty cycle input is lower than 0.38%, but not 0%, the phase outputs will be put into
a high impedance state. The device will stop driving the motor. The device logic is still active during standby
mode and the DRV10964 device will consume current as specified by I_VCC.
Copyright © 2016, Texas Instruments Incorporated
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