HAL566
4.3. HAL566
Applications
The HAL566 is a very sensitive unipolar switching
sensor with an inverted output (see Fig. 4–9).
The HAL566 is designed for applications with one mag-
netic polarity and weak magnetic amplitudes at the sen-
sor position where an inverted output signal is required
such as:
The sensor turns to low current consumption with the
magnetic south pole on the branded side of the package
and turns to high current consumption if the magnetic
field is removed. It does not respond to the magnetic
north pole on the branded side.
– applications with large airgap or weak magnets,
– solid state switches,
– contactless solutions to replace micro switches,
– position and end point detection, and
– rotating speed measurement.
For correct functioning in the application, the sensor re-
quires only the magnetic south pole on the branded side
of the package.
In the HAL55x, HAL56x two-wire sensor family, the
HAL556 is a sensor with the same magnetic character-
istics but with a normal output characteristic.
Current consumption
I
DDhigh
B
HYS
Magnetic Features:
– switching type: unipolar inverted
– high sensitivity
I
DDlow
– typical B : 4 mT at room temperature
ON
0
B
ON
B
OFF
B
– typical B
: 5.9 mT at room temperature
OFF
Fig. 4–9: Definition of magnetic switching points for
the HAL566
– operates with static magnetic fields and dynamic mag-
netic fields up to 10 kHz
Magnetic Characteristics at T = –40 °C to +170 °C, V = 4 V to 24 V,
J
DD
Typical Characteristics for V = 12 V
DD
Magnetic flux density values of switching points.
Positive flux density values refer to the magnetic south pole at the branded side of the package.
Parameter
On point B
Typ.
Off point B
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
J
Min.
2.1
2
Max.
5.9
5.7
5.7
6
Min.
Typ.
Max.
7.7
7.2
7
Min.
Typ.
Max.
Min.
Typ.
Max.
–40 °C
4
3.4
3.4
3.25
2.6
2.2
6
0.8
0.5
0.3
0.2
0.2
2
2.8
2.7
2.6
3
5
mT
mT
mT
mT
mT
25 °C
100 °C
140 °C
170 °C
3.9
3.8
3.6
3.4
5.9
5.6
5.2
4.8
2
3
4.9
4.7
4.4
4.1
6.2
1.85
1.3
1
1.8
1.6
1.4
7.3
7.6
6.3
3
The hysteresis is the difference between the switching points B
= B
– B
OFF ON
HYS
The magnetic offset is the mean value of the switching points B
= (B + B ) / 2
OFFSET
ON
OFF
Changes to the previous edition:
– specification for 140 °C and 170 °C added
16
Micronas
MICRONAS [ MICRONAS ]
