WSH131
Omnipolar Hall Effect Switch IC
Features:
Operates from 2.4V to 26V supply voltage
Operation with
North
or
South
Pole
On-chip Hall Sensor and driver
On-chip temperature compensation circuitry minimizes shifts in On/Off points
temperature and supply voltage
On-chip voltage regulator to stabilize On/Off switch point
Wide range operating temperature –40 ~ 125℃
Easily Manufacturability with magnet pole independence
South
or
North
magnetic field: Output
Low
No
magnetic field : Output
High.
Functional Description:
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 –40˚ C
to 125
˚C
and voltage ranges from 2.4V to 26V.
Pin Descriptions:
Name
P/I/O
Vdd
P
Gnd
P
Vout
O
Pin#
1
2
3
Description
Positive Power Supply
Ground
Output Pin
Winson reserves the right to make changes to improve reliability or manufacturability.
©Winson, 2007/8/29(Rev. B)
1
WINSON [ WINSON SEMICONDUCTOR CORP. ]
