TMAG5231 Low-Power Hall Effect Switch Texas Instruments TMAG5231 Low-Power Hall Effect Switch is specifically designed to optimize the total system cost for compact, battery-operated consumer and industrial applications. The device outputs a low voltage when the applied magnetic flux density exceeds the operating point (BOP) threshold. The output stays low until the flux density decreases to less than the release point (BRP), and then the device outputs a high voltage. The omnipolar magnetic response makes the output sensitive to both north and south magnetic fields.