S3144

S3144 Unipolar Hall-Effect Digital Switch Features and Benefits – 4.5V to 24V Operation – -40°C to 150°C Superior temperature operation – Bipolar technology – Open-collector 25 mA output – Reverse battery protection – Small Size SOT23 3L or SIP 3L – Solid-state reliability – Resistant to physical stress – Activate with small, commercially available Permanent magnets Application Examples − Automotive, Consumer and Industrial − Solid-state switch − Brushless DC motor commutation − Speed detection − Linear position detection − Angular position detection − Proximity detection 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) Functional Block Diagram VDD Voltage Regulatr Chopper OUT Hall Plate GND SIP Package Pin 1 – VDD Pin 2 – GND Pin 3 – OUT SOT Package Pin 1 – VDD Pin 2 – OUT Pin 3 – GND 1 V3.10 Nov 1, 2013 S3144 Unipolar Hall-Effect Digital Switch General Descriptions The S3144 is a unipolar Hall-effect sensor IC fabricated from bipolar technology. The device integrates a voltage regulator, reverse battery protection diode, Hall sensor with dynamic offset cancellation system, temperature compensation circuitry, small signal amplifier, Schmitt trigger and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be used with bipolar or CMOS logic circuits. These Hall-effect switches are monolithic integrated circuits with tighter magnetic specifications, designed to operate continuously over extended temperatures to +150°C,and are more stab...