Uniand Bipolar Hall IC Switches for |
TLE 4905 G; TLE 4935 |
G |
Magnetic Field Applications |
TLE 4935-2 G; TLE 4945-2 |
G |
Bipolar IC
Features
•Temperature compensated magnetic performance
•Digital output signal
•For unipolar and alternating magnetic fields
•Large temperature range
•Protection against reversed polarity
•Output protection against electrical disturbances
SOT-89
|
Type |
Ordering Code |
Package |
|
|
|
|
▼ |
TLE 4905 G |
Q62705-K402 |
SOT-89 |
|
|
|
|
▼ |
TLE 4935 G |
Q62705-K404 |
SOT-89 |
|
|
|
|
▼ |
TLE 4935-2 G |
Q62705-K405 |
SOT-89 |
|
|
|
|
▼ |
TLE 4945-2 G |
Q62705-K403 |
SOT-89 |
|
|
|
|
|
▼ New type |
|
|
TLE 4905/35/35-2/45-2 (Unipolar/Bipolar Magnetic Field Switches) have been designed specifically for automotive and industrial applications. Reverse polarity protection is included on-chip as is output protection against negative voltage transients.
Typical applications are position/proximity indicators, brushless DC motor commutation, rotational indexing etc.
Semiconductor Group |
1 |
1998-04-29 |
TLE 4905 G; TLE 4935 G
TLE 4935-2 G; TLE 4945-2 G
Pin Configuration
(top view)
2.25 ±0.2 |
|
Center of |
|
sensitive area |
|
|
|
|
1±0.2
1 |
2 |
3 |
AEP02150
Figure 1
Pin Definitions and Funtions
Pin No. |
Symbol |
Function |
|
|
|
1 |
VS |
Supply voltage |
2 |
GND |
Ground |
|
|
|
3 |
Q |
Output |
|
|
|
Semiconductor Group |
2 |
1998-04-29 |
TLE 4905 G; TLE 4935 G
TLE 4935-2 G; TLE 4945-2 G
Circuit Description
The circuit includes Hall generator, amplifier and Schmitt-Trigger on one chip. The internal reference provides the supply voltage for the components. A magnetic field perpendicular to the chip surface induces a voltage at the hall probe. This voltage is amplified and switches a Schmitt-trigger with open-collector output. A protection diode against reverse power supply is integrated.
The output is protected against electrical disturbances.
|
Threshold |
|
|
|
Generator |
|
|
V |
1 |
3 |
Q |
S |
Hall- |
|
|
|
|
|
|
|
Generator |
|
|
|
VS |
|
|
|
VRef |
|
|
|
Amplifier |
Schmitt- |
|
|
|
Trigger |
|
|
|
Output |
|
|
2 |
Stage |
|
|
|
|
|
|
GND |
AEB01243 |
|
Figure 2 Block Diagram
Semiconductor Group |
3 |
1998-04-29 |
TLE 4905 G; TLE 4935 G
TLE 4935-2 G; TLE 4945-2 G
Functional Description Unipolar Type TLE 4905 (figure 3 and 4)
When a positive magnetic field is applied in the indicated direction (figure 3) and the turn-on magnetic induction BOP is exceeded, the output of the Hall-effect IC will conduct (Operate Point). When the magnetic field is reduced to a value smaller than the release point, the output of the IC turns off (Release Point; figure 4).
+
Branded Side
Ι
S
N 
VQ
+ -
VS AES01231
Figure 3 Sensor/Magnetic-Field Configuration
B |
|
BOP |
|
BRP |
Induction |
0 |
t |
|
|
VQ |
|
VQH |
|
Output Voltage
VQL
t
AED01420
Figure 4 Switching Characteristics Unipolar Type
Semiconductor Group |
4 |
1998-04-29 |
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