HAL55x, HAL56x
DATA SHEET
4. Type Description
4.1. HAL556
Applications
The HAL556 is designed for applications with one
magnetic polarity and weak magnetic amplitudes at
the sensor position such as:
The HAL556 is a very sensitive unipolar switching sen-
sor (see Fig. 4–1).
– applications with large airgap or weak magnets,
– solid state switches,
The sensor turns to high current consumption with the
magnetic south pole on the branded side of the pack-
age and turns to low current consumption if the mag-
netic field is removed. It does not respond to the mag-
netic north pole on the branded side.
– contactless solutions to replace micro switches,
– position and end point detection, and
– rotating speed measurement.
For correct functioning in the application, the sensor
requires only the magnetic south pole on the branded
side of the package.
Current consumption
IDDhigh
In the HAL55x, HAL56x two-wire sensor family, the
HAL566 is a sensor with the same magnetic charac-
teristics but with an inverted output characteristic.
BHYS
IDDlow
Magnetic Features:
– switching type: unipolar
0
BOFF
BON
B
– very high sensitivity
Fig. 4–1: Definition of magnetic switching points for
the HAL556
– typical BON: 6 mT at room temperature
– typical BOFF: 4 mT at room temperature
– operates with static magnetic fields and dynamic
magnetic fields up to 10 kHz
Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 4 V to 24 V,
Typical Characteristics for VDD = 12 V
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
Off point B
Typ.
4.2
Hysteresis B
HYS
Magnetic Offset
Unit
ON
OFF
T
Min.
3.4
3.4
3.2
3
Typ.
6.3
6
Max.
7.7
Min.
2.1
2
Max.
Min.
Typ.
2.1
1.8
1.8
1.6
Max.
Min.
Typ.
5.2
4.9
4.6
4.4
Max.
J
−40 °C
25 °C
5.9
5.7
5.7
6
0.8
0.5
0.3
0.2
3
mT
mT
mT
mT
7.4
3.8
2.8
2.8
3
2.7
6.5
100 °C
140 °C
5.5
5.2
7.2
1.9
1.2
3.7
7.4
3.6
The hysteresis is the difference between the switching points BHYS = BON − BOFF
The magnetic offset is the mean value of the switching points BOFFSET = (BON + BOFF) / 2
18
Aug. 11, 2009; DSH000026_004EN
Micronas
MICRONAS [ MICRONAS ]
