V/I Sensor

VCC

GND

U

V

W

U

V

W

ADC

GND

FG

DRV10964

UVLO

Over Current

Lock

FR

FGS

PWM

Decode

CONFIG

Thermal

Logic

Core

PWM and

WakeUp

DRV10964

7

DRV10964

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SLDS227 – MARCH 2016

Product Folder Links: DRV10964

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7 Detailed Description

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

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