Datasheet Summary
Allegro MicroSystems, LLC Confidential Information
Three Phase Sinusoidal Fan Driver
Features and Benefits
Description
- Full 3-phase sinusoidal drive
The A5943 is a low noise, three phase motor driver with
- PWM speed input integrated power bridge suitable for driving small fans and
- Analog speed input blowers. Motor audible noise and vibration is reduced by
- FG speed output driving the phases with sinusoidal PWM excitation. Motor
- Lock detection current is controlled using PWM techniques to minimize the
- Current limiting power dissipation.
- Output short circuit protection
Rotor position is determined by Hall effect elements. These provide direct inputs to...