Uniand Bipolar Hall IC Switches for |
TLE 4905 L; TLE 4935 L; |
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Magnetic Field Applications |
TLE 4935-2 L; TLE 4945 L; |
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TLE 4945-2L |
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Bipolar IC |
Features |
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• Temperature compensated magnetic performance |
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• Digital output signal |
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• For unipolar and alternating magnetic fields |
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• Large temperature range |
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• Protection against reversed polarity |
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• Output protection against electrical disturbances |
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P-SSO-3-2 |
Type |
Ordering Code |
Package |
TLE 4905 L |
Q67006-A9120 |
P-SSO-3-2 |
TLE 4935 L |
Q67006-A9112 |
P-SSO-3-2 |
TLE 4935-2 L |
Q67006-A9143 |
P-SSO-3-2 |
TLE 4945 L |
Q67006-A9163 |
P-SSO-3-2 |
TLE 4945-2L |
on request |
P-SSO-3-2 |
TLE 4905/35/35-2/45 L (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 |
1997-09-01 |
TLE 4905 L; TLE 4935 L;
TLE 4935-2 L; TLE 4945 L; TLE 4945-2L
Pin Configuration
(view on branded side of component)
Center of sensitive area
2.08±0.15
1.35 ±0.15
1 |
2 |
3 |
VS GND Q
AEP01364
Figure 1
Pin Definitions and Functions
Pin No. |
Symbol |
Function |
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1 |
VS |
Supply voltage |
2 |
GND |
Ground |
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3 |
Q |
Output |
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Semiconductor Group |
2 |
1997-09-01 |
TLE 4905 L; TLE 4935 L;
TLE 4935-2 L; TLE 4945 L; TLE 4945-2L
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.
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Threshold |
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Generator |
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V |
1 |
3 |
Q |
S |
Hall- |
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Generator |
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VS |
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VRef |
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Amplifier |
Schmitt- |
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Trigger |
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Output |
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2 |
Stage |
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GND |
AEB01243 |
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Figure 2
Block Diagram
Semiconductor Group |
3 |
1997-09-01 |
TLE 4905 L; TLE 4935 L;
TLE 4935-2 L; TLE 4945 L; TLE 4945-2L
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 current is reduced, 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 |
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BOP |
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BRP |
Induction |
0 |
t |
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VQ |
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VQH |
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Output Voltage
VQL
t
AED01420
Figure 4
Switching Characteristics Unipolar Type
Semiconductor Group |
4 |
1997-09-01 |
TLE 4905 L; TLE 4935 L;
TLE 4935-2 L; TLE 4945 L; TLE 4945-2L
Functional Description Bipolar Type TLE 4935/35-2/45 (figure 5 and 6)
When a positive magnetic field is applied in the indicated direction (figure 5) and the turn-on magnetic induction BOP is exceeded, the output of the Hall-effect IC will conduct (Operate Point). When a reverse magnetic field is generated, the output of the IC turns off (Release Point; figure 6).
+
Branded Side
Ι
S
N 
VQ
+ -
VS AES01231
Figure 5
Sensor/Magnetic-Field Configuration
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B |
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BOP |
0 |
Induction |
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t |
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BRP |
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VQ |
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VQH |
Output Voltage
VQL
t
AED01421
Figure 6
Switching Characteristics Bipolar Type
Semiconductor Group |
5 |
1997-09-01 |
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