TLE4946K

General

Data Sheet

4

Rev 1.0, 2007-09

2

General

2.1

Block Diagram

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.

Ref

Chopped

Hall Probe

V

S

Q

GND

Amplifier

Low

Pass

Filter

Comparator

with

Hysteresis

Voltage Regulator

reverse polarity protected

Oscillator

and

Sequencer

Bias and

Compensation

Circuits