Two-wire current-type Hall switch sensor - AH543

AH543 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 provides current output. The comparator compares the actual magnetic flux with a fixed reference value (switch point) to control the current of the output MOSFET. Active offset compensation produces magnetic characteristics with specific temperature coefficients at 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. AH543 is available in three package types: TO92S, SOT23 (small), and SOT23-3L, all RoHS compliant and AEC-Q100 certified.

I.Features of two-wire current-type Hall switch sensor -AH543:

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

II.Features of two-wire current-type Hall switch sensor -Applications of AH543:

Speed and RPM sensors

Tachometer sensors, flow sensors

DC motors, motor and fan control, robot control

Proximity sensors, position sensors

Safety belts, hoods, trunk locks

Sunroof/convertible/tailgate/liftgate activation

Brake/clutch pedals

Electric power steering (EPS)

Transmission shifting

Wiper motors