Data Sheet

Product Name Product Type Ordering Code Package

Hall Effect Latch TLE4946-2K SP000472424 SC59

FinalDatasheet 5 Rev.1.0, 2008-09-18

High Precision Hall Effekt Latch

TLE4946-2K

1 Product Description

1.1 Overview

The TLE4946-2K is a high precision Hall effect latch

with highly accurate switching thresholds for operating

temperatures up to 150°C.

1.2 Features

•2.7 V to 24 V supply voltage operation

• Operation from unregulated power supply

• High sensitivity and high stability of the magnetic switching points

• High resistance to mechanical stress by active error compensation

• Reverse battery protection (– 18V)

• Superior temperature stability

• Peak temperatures up to 195°C without damage

• Low jitter (typ. 1 µs)

• High ESD performance (± 4kV HBM)

• Digital output signal

• SMD package SC59

1.3 Target Applications

The TLE4946-2K is an integrated circuit Hall-effect sensor with low switching thresholds and low hysteresis which

make it ideally suited to detect the rotor position in a BLDC motor commutation application.

2 Functional Description

2.1 General

Precise magnetic switching thresholds and high temperature stability are achieved by active compensation circuits

and chopper techniques on chip. Offset voltages, generated by temperature induced stress or overmolding are

canceled and high accuracy is achieved. The IC has an open collector output stage with 20mA current sink

capability. A wide operating voltage range form 2.7V to 18V with reverse polarity protection up to -18V makes the

device suitable for a wide range of applications. A magnetic south pole with field strength above B

turns the

output on and a magnetic north pole exceeding B

turns it off.