The US63 with alarm output, is a one-chip answer for driving two-coil brushless DC cooling fans. It is built on the advanced Melexis CMOS process. The IC has a dynamic offset correction, high sensitivity Hall sensor and low side output driver. The rotation detection open-drain output creates a much easier way to connect than with an external interface such as Super I/O IC or hardware monitoring. The IC fits in a small four-pin VK package and its low cost makes it very appealing.

The US63 has a locked rotor protection and provides auto restart. It runs a very power-efficient CMOST and power MOSFETs. The unit has a built in output protection clamping diode.

Parameter Name	Parameter Value
Applications	for fans