BLDC motor driver will have many fans
The AMT49406 is a three-phase, sensorless, BLDC motor driver (gate driver) from Allegro Microsystems that can operate from 5.5 V to 50 V.
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
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