Omnipolar Hall Effect Switch IC
z Operates from 2.4V to 26V supply voltage
z Operation with North or South Pole
z On-chip Hall Sensor and driver
z On-chip temperature compensation circuitry minimizes shifts in On/Off points
temperature and supply voltage
z On-chip voltage regulator to stabilize On/Off switch point
z Wide range operating temperature –20 ~ 85℃
z Easily Manufacturability with magnet pole independence
South or North magnetic field: Output Low
No magnetic field : Output High.
WSH131 is designed to integrate pole independent Hall sensor with output driver
together on the same chip. Either North or South magnetic field with sufficient
strength will turn the output on (low). In the absence of a magnetic field, output is off
(high). The polarity independence allow WSH131 to easily replace reed switches for
superior reliability and case of manufacturing.
To improve stability, it includes a temperature compensated voltage regulator, a
differential amplifier, a Hysteresis controller and a open-collector output driver
capable of sinking up to 20mA current load. 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 output can
keep switching on/off on more precise switch point regardless to the ambient
temperature. WSH131 are rated for operation over temperature range from –20˚ C
to 85 ˚C and voltage ranges from 2.4V to 26V.
Positive Power Supply
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2013/5/23(Rev. B)