A4941 Description
The A4941 three-phase motor driver incorporates BEMF sensing to eliminate the requirement for Hall sensors in fan applications. A pulse wave modulated (PWM) input is provided to control motor speed, allowing system cost savings by eliminating external variable power supply. PWM input can also be used as an on/off switch to disable motor operation and place the IC into a low power standby mode.
A4941 Key Features
- Sensorless (no Hall sensors required)
- Soft switching for reduced audible noise
- Minimal external ponents
- PWM speed input
- FG speed output
- Low power standby mode
- Lock detection
- Optional overcurrent protection
- Variant A automotive qualified to AEC-Q100 Grade 2