BLDC motor driver will have many fans

It is in stock at distributor DigiKey.

Applications cover ceiling fans, pedestal fans, bathroom exhaust fans and home appliance fans and pumps.

A field-oriented control (FOC) algorithm is fully integrated to achieve the best efficiency and acoustic noise performance.

The device optimises the motor startup performance in a stationary condition, a windmill condition, and even in a reverse windmill condition.

Motor speed is controlled through analogue, 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 AMT49406 is available in a 24-contact 4 mm × 4 mm QFN with an exposed thermal pad (suffix ES) and a 24-lead TSSOP with an exposed thermal pad (suffix LP).

These packages are lead (Pb) free with 100% matte-tin lead frame plating.

Features include:

• Code-free sensorless FOC
• Proprietary non-reverse fast startup

• Soft-on soft-off (SOSO) for quiet operation
• Lock detection
• Short-circuit protection (OCP)
• Brake and direction inputs