A4949 Overview
The A4945 and A4949 three phase motor drivers incorporate sinusoidal drive to minimize audible noise and vibration for medium power fans. A Speed input is provided to control motor speed. This allows system cost savings by eliminating an external variable power supply.
A4949 Key Features
- 180° sinusoidal drive for low audible noise
- High efficiency control algorithm
- Sensorless operation
- Analog Speed input (A4945)
- PWM Speed input (A4949)
- Wide supply voltage range
- FG speed output
- Lock detection
- Overcurrent protection
- Soft start