FEATURES AND BENEFITS

• Code-free sensorless field-oriented control (FOC)

• Constant speed, constant torque, constant power, and

open-loop operating modes

• I2C interface for speed control and status readback

• Programmable, flexible in-to-output transformer

• Ultra-quiet low speed operation

• Proprietary non-reverse fast startup

• Soft-On Soft-Off (SOSO) for quiet operation

• Analog / PWM / Clock mode speed control

• Closed-loop speed control

• Configurable current limit

• Windmill startup operation

• Lock detection

• Short-circuit protection (OCP)

• Brake and direction inputs

• Adjustable gate drive

• Automotive AEC-Q100 qualified

APPLICATIONS

Battery cooling fan

• Radiator fan

• Fuel, oil pump

DESCRIPTION

The A89307 is a 3-phase, sensorless, brushless DC (BLDC)

motor driver (gate driver) which can operate from 5.5 to 50 V.

A field-oriented control (FOC) algorithm is fully integrated to

achieve the best efficiency and acoustic noise performance.

Constant torque and constant power mode are provided as well

as constant speed and open-loop operating modes.

The device also optimizes the motor startup performance in

a stationary condition, a windmill condition, and even in a

reverse windmill condition.

Motor speed is controlled through analog, PWM, or CLOCK

input. Closed-loop speed control is optional, and RPM-to-clock

frequency ratio is programmable.

A simple I2C interface is provided for setting motor-rated

voltage, rated current, rated speed, resistance, and startup

profiles. The I2C interface is also used for on/off control, speed

control, and speed readback.

The A89307 is available in a 28-contact 5 mm × 5 mm QFN

with exposed thermal pad (suffix ET) and wettable flank. The

package is lead (Pb) free, with 100% matte-tin leadframe plating.