TLE4906H_05 Datasheet, PDF (7/20 Pages) Infineon Technologies AG – High Precision Hall-Effect Switch

2
General
2.1
Block Diagram
Voltage Regulator
reverse polarity protected
TLE4906H
TLE4906L
General
V_S
Bias and
Compensation
Circuits
Oscillator
and
Sequencer
Q
Ref
Chopped
Hall Probe
Amplifier
Low
Pass
Filter
Comparator
with
Hysteresis
GND
Figure 2 Block Diagram
2.2
Circuit Description
The chopped Hall IC Switch comprises a Hall probe, bias generator, compensation
circuits, oscillator, and output transistor.
The bias generator provides currents for the Hall probe and the active circuits.
Compensation circuits stabilize the temperature behavior and reduce technology
variations.
The Active Error Compensation rejects offsets in signal stages and the influence of
mechanical stress to the Hall probe caused by molding and soldering processes and
other thermal stresses in the package.
This chopper technique together with the threshold generator and the comparator
ensure high accurate magnetic switching points.
Data Sheet
7
V 1.1, 2005-10