Two-wire current-type Hall switch sensor - AH544

AH544 is a Hall switch sensor designed based on BCDMOS technology. The sensor includes a temperature-compensated Hall element, dynamic offset cancellation amplifier, comparator, and output stage. The chip features current output. The comparator compares the actual magnetic flux with a fixed reference value (switching point) to control the current magnitude of the output MOSFET. Active offset compensation provides magnetic characteristics with specific temperature coefficients across various supply voltages. Additionally, mechanical stress has minimal impact on magnetic parameters.

This series of sensor chips is suitable for industrial environments and automotive applications, with an ambient temperature range of -40°C to 150°C and a supply voltage range of 3.0V to 30V. AH544 is available in three package types: TO92S, SOT23(small), and SOT23-3L. The packages comply with RoHS standards, and the product has passed AEC-Q100 certification.

I.Two-wire current-type Hall switch sensor -Features of AH544:

AEC-Q100 Grade 0 automotive certification
Operating voltage: 3.0V ~ 30V
ESD protection up to: ±12kV
Strong resistance to mechanical stress
Switching points with specific temperature coefficients
Temperature range: -40°C ~ 150°C
Reverse voltage protection on power pin
Suitable for automotive and industrial applications

II.Two-wire current-type Hall switch sensor -Applications of AH544:

Speed and RPM sensors

Tachometer sensors, flow sensors

DC motors, motor and fan control, robot control

Proximity sensors, position sensors

Safety belts, engine hoods, trunk locks

Sunroof/convertible/tailgate/liftgate actuation

Brake/clutch pedals

Electric power steering (EPS)

Transmission shifting

Wiper motors