WSH41FC

WSH41FC is designed to integrate Hall sensor with complementary output drivers and frequency generator together on the same chip, it is suitable for speed measurement, revolution counting, positioning, and DC brushless motors. The WSH41FC includes a temperature compensated voltage regulator, a differential amplifier, a Hysteresis controller, two open-collector output drivers capable of sinking 400mA current load and an open-collector frequency generator capable of sinking 10mA current load. An on-chip protection diode is implemented to prevent reverse power fault.

The temperature-dependent bias increases the supply voltage of the hall plates and adjusts the switching points to the decreasing induction of magnets at higher temperatures. Subsequently, the open collector output switches to the appropriate state. WSH41FC are rated for operation over temperature range from 20˚ C to125˚C and voltage ranges from 2.8V to 20V.

In SOT-25 package, the built-in FG function can save fan system a lot of cost. The WSH41FC is a very economical solution when fan system need FG signal.