Low Power Hall Switch
TLE 4917
Features
•
Micro power design
•
2.4 V to 5.5 V battery operation
•
High sensitivity and high stability of the
magnetic switching points
•
High resistance to mechanical stress
•
Digital output signal
•
Switching for both poles of a magnet (omnipolar)
•
Programming pin for the switching
direction of the output
Functional Description
The TLE 4917 is an Integrated Hall-Effect Sensor designed specifically to meet the
requirements of low-power devices. e.g. as an On/Off switch in Cellular Flip-Phones, with
battery operating voltages of 2.4V – 5.5V.
Precise magnetic switching points and high temperature stability are achieved through the
unique design of the internal circuit.
An onboard clock scheme is used to reduce the average operating current of the IC.
During the operate phase the IC compares the actual magnetic field detected with the
internally compensated switching points. The output Q is switched at the end of each
operating phase.
During the Stand-by phase the output stage is latched and the current consumption of the
device reduced to some µA.
The IC switching behaviour is omnipolar, i.e. it can be switched on with either the North or
South pole of a magnet.
The PRG pin can be connected to V
S
which holds the output V
Q
at a High level for B=0mT;
conversely the output V
Q
can be inverted by connecting the PRG pin to GND, which will
hold the output V
Q
at a Low level for B=0mT. In this later case the presence of an adequate
magnetic field will cause the output V
Q
to switch to a High level ( i.e. off state ).
Type
TLE 4917
Marking
17s
Ordering Code
Q62705K 605
Package
P-TSOP6-6-2
P-TSOP6-6-2
Data Sheet
1
INFINEON [ INFINEON TECHNOLOGIES AG ]
