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June 2008

Sensors

  

Datasheet

 
Rev 1.0

TLE4946-2L

High Precision Hall Effect Latch

  TLE4946-2L         

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Edition 2008-06
Published by

 

Infineon Technologies AG

 

81726 München, Germany
© 2007 Infineon Technologies AG

 

All Rights Reserved.

Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or 

characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any 

information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties 

and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights 

of any third party.

Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest 

Infineon Technologies Office (

www.infineon.com

).

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TLE4946-2L High Precision Hall Effect Latch
  
Revision History: 2008-06, Rev 1.0
Previous Version: 
Page

Subjects (major changes since last revision)

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TLE4946-2L

  Datasheet

3

Rev 1.0, 2008-06

 

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  Datasheet

4

Rev 1.0, 2008-06

 

  

TLE4946-2L

1

Product Description  5

1.1

Overview  5

1.2

Features  5

1.3

Target Applications  5

2

Functional Description  5

2.1

General  5

2.2

Pin Configuration  6

2.3

Pin Description  6

2.4

Block Diagram  6

2.5

Operating Modes and States  7

2.6

Functional Block Description  7

3

Specification  8

3.1

Application Circuit  8

3.2

Absolute Maximum Ratings  8

3.3

Operating Range  9

3.4

Characteristics  9

4

Package Information  10

4.1

Package Outline  10

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Product Name

Product Type

Ordering Code

Package

 Hall Effect Latch

TLE4946-2L

SP000398352

PG-SSO-3-2    

  Datasheet

5

Rev 1.0, 2008-06

 

High Precision Hall Effect Latch

 

 

TLE4946-2L

  

1

Product Description

1.1

Overview

The TLE4946-2L 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 18 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 (V

s

 = -18V)

Superior temperature stability

Peak temperatures up to 195°C without damage

Low jitter (typ. 1µs)

High ESD performance (± 4 kV HBM)

Digital output signal

1.3

Target Applications

The TLE4946-2L is an integrated circuit Hall-effect sensor with low switching thresholds and low hysteresis. It is 
specially designed for high sensitivity applications and is ideally suited to detect the rotor position in a BLDC motor. 
Also for index counting with small pole wheels and large air gaps the sensor provides a reliable switching 
information. 

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

op

 turns the 

output on and a magnetic north pole exceeding B

rp

 turns it off.

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  Datasheet

6

Rev 1.0, 2008-06

 

  

TLE4946-2L

Functional Description

2.2

Pin Configuration

Center of

Sensitive Area

3

2

1

PG-SSO-3-2

± 0.1

1.35

± 0.1

2.08

Figure 1

Pin Configuration and sensitive area (Top View, Figure not to Scale)

2.3

Pin Description

Table 1

Pin Description 

Pin or Ball 
No.

Name

Pin 
Type

Function

Comments

1

Vs

I

Supply voltage

2

GND

O

Ground

3

Q

O

Output

2.4

Block Diagram

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

Figure 2

TLE4946-2L Block Diagram

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  Datasheet

7

Rev 1.0, 2008-06

 

  

TLE4946-2L

Functional Description

2.5

Operating Modes and States

Field Direction Definition:
Positive magnetic fields are related with the south pole of the magnet to the branded side of package.

Applied

Magnetic

Field

90%

10%

V

Q

t

f

t

d

t

r

t

d

B

OP

B

RP

Figure 3

Timing diagram

V

Q

B

op

B

rp

0

B

Figure 4

Output Signal

2.6

Functional Block 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

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  Datasheet

8

Rev 1.0, 2008-06

 

  

TLE4946-2L

Specification

3

Specification

3.1

Application Circuit

V

S

Q

GND

T

L

E

4

94

6

-2L

200

1.

2k

V

S

GND

4.

7nF

4.

7n

F

Q

Figure 5

Application circuit

It is recommended to use a serial resistor of 200

Ω in the supply line for current limitation in the case of a 

overvoltage pulse. Two capacitors of 4.7nF enhance the EMC performance. The pull-up resistor of 1.2k

Ω limits 

the current through the output transistor.

3.2

Absolute Maximum Ratings

Table 2

Absolute Maximum Ratings 

Parameter

Symbol

Values

Unit

Note/Test Condition

Min.

Typ.

Max.

Max. junction temperature

T

J

-40

150

°C

155

for 2000 h (not 
additive)

165

for 1000 h (not additive

175

for 168 h (not additive)

195

for 3 x 1 h (additive)

Supply voltage

V

DD

-18
-18
-18



18
24
26

V

for 1h, R

s

 

≥ 200Ω

for 5min, R

s

 

≥ 200Ω

Supply current through 
protection device

I

S

– 50

+ 50

mA

Output voltage

V

Q

-0.7

18

V

-0.7

26

for 5min @ 1.2k

Ω pull 

up

Storage temperature

T

S

– 40

150

°C

Magnetic flux density

B

unlimited mT

ESD robustness

 

HBM: 1.5 k

Ω, 100 pF

V

ESD,HBM

4

kV

According to 
EIA/JESD22-A114-B

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  Datasheet

9

Rev 1.0, 2008-06

 

  

TLE4946-2L

Specification

Attention: Stresses above the max. values listed here may cause permanent damage to the device. 

Exposure to absolute maximum rating conditions for extended periods may affect device 
reliability. Maximum ratings are absolute ratings; exceeding only one of these values may 
cause irreversible damage to the integrated circuit.

3.3

Operating Range

The following operating conditions must not be exceeded in order to ensure correct operation of the TLE4946-2L.
All parameters specified in the following sections refer to these operating conditions unless otherwise mentioned.

Table 3

Operating Range 

Parameter

Symbol

Values

Unit

Note/ Test Condition

Min.

Typ.

Max.

Supply voltage

V

S

2.7

18

V

Output voltage

V

Q

– 0.7

18

V

Junction temperature

T

j

– 40

150

°C

Output current

I

Q

0

20

mA

3.4

Characteristics

Product characteristics involve the spread of values guaranteed within the specified voltage and ambient 
temperature range. Typical characteristics are the median of the production (at V

s

 = 12V and T

A

= 25°C).

Table 4

Electrical Characteristics 

Parameter

Symbol

Values

Unit

Note/ Test Condition

Min.

Typ.

Max.

Supply current 

I

S

2

4

6

mA

V

S

 = 2.7 V ... 18 V

Reverse current 

I

SR

0

0.2

1

mA

V

S

 = – 18 V

Output saturation voltage

V

QSAT

0.3

0.6

V

I

Q

 = 20 mA

Output leakage current

I

QLEAK

0.05

10

µA

for V

Q

 = 18 V

Output fall time

t

f

0.02

1

µs

R

L

 = 1.2 k

Ω; 

C

L

 = 50 pF

Output rise time

t

r

0.4

1

µs

Chopper frequency

f

OSC

320

kHz

Switching frequency

f

SW

0

15

1) To operate the sensor at the max. switching frequency, the value of the magnetic signal amplitude must be 1.4 times higher 

than for static fields.

 

This is due to the - 3 dB corner frequency of the low pass filter in the signal path.

 1)

kHz

Delay time

2) Systematic delay between magnetic threshold reached and output switching

 2)

t

d

13

µs

Output jitter

3) Jitter is the unpredictable deviation of the output switching delay

 3)

t

QJ

1

µs

RMS

Typ. value for square 
wave signal 1 kHz

Power-on time

4) Time from applying 

V

S

 

≥ 2.7 V to the sensor until the output state is valid

 4)

t

PON

13

µs

V

S

 

≥ 2.7 V

Thermal resistance

5) Thermal resistance from junction to ambient

 5) 

R

thJA

190

K/W

PG-SSO-3-2    

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Table 5

Magnetic Characteristics 

Parameter

Symbol

Values

Unit

Note/ Test Condition

Min.

Typ.

Max.

Operate point

B

OP

0.5

2.0

3.5

mT

Release point

B

RP

-3.5

-2.0

-0.5

mT

Hysteresis

B

HYS

1.0

4

6.0

mT

Magnetic Offset

1) B

off

 = (B

op

 + B

rp

)/2

1)

B

OFF

-1.5

0

1.5

mT

Temperature compensation of 
magn. thresholds

TC

-350

ppm/°C

Repeatability of magnetic 
thresholds

2) B

REP

 is equivalent to the noise constant

 2)

B

REP

20

µT

RMS

  Datasheet

10

Rev 1.0, 2008-06

 

  

TLE4946-2L

Package Information

4

Package Information

4.1

Package Outline

PG-SSO-3-2 : 0.57

d :  Distance chip to upper side of IC

mm

±0.08

AEA02510-1

Hall-Probe

Branded Side

d

AEA03644

Year (y) = 0...9

Calendar Week  (ww) = 01...52

yw

w

 

46

 2

S

Figure 6

Marking of TLE4946-2L and Distance of chip to upper side of IC

Maker
Infineon Technologies
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