-
2022-09-24 23:33:15
AH291-Low Voltage Hall Effect Smart Fan Motor Controller
Features
- Hall sensor on chip
- Rotor Lock Shutdown
- automatic restart
- Built-in zener protection, output driver
- Working voltage: 1.8V~5.75V
- Output current: IO (average) = 400mA
- Packing: SIP- 4L, SOT23- 5L, SOT89- 5L
The AH291 is a monolithic fan motor controller, with hall sensor capability. It contains two complementary open collectors for the motor coil to drive the driver, with automatic lock-off and restart functions relative to each other. To avoid coil burn, the rotor lock shutdown detection circuit shuts down the output driver, if the rotor is blocked, then the automatic recovery circuit attempts to restart the motor. These protective actions were repeated and regular during the lockdown. Normal operation of the motor resumes until the blockage is removed.