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HAL573 Fiches technique(PDF) 27 Page - Micronas |
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HAL573 Fiches technique(HTML) 27 Page - Micronas |
27 / 36 page DATA SHEET HAL579 Micronas Dec. 22, 2008; DSH000145_003EN 27 4.5. HAL579 The HAL 579 is a unipolar switching sensor with low sensitivity (see Fig. 4–17). The sensor turns to high current consumption with the magnetic south pole on the branded side of the pack- age and turns to low consumption with the magnetic north pole on the branded side. The current consump- tion does not change if the magnetic field is removed. For changing the current consumption, the opposite magnetic field polarity must be applied. For correct functioning in the application, the sensor requires both magnetic polarities on the branded side of the package. Magnetic Features: – switching type: latching – medium sensitivity –typical BON: 12.0 mT at room temperature –typical BOFF: -12.0 mT at room temperature – typical temperature coefficient of magnetic switching points is 0 ppm/K – operates with static magnetic fields and dynamic magnetic fields up to 10 kHz Applications The HAL579 is designed for applications with both magnetic polarities and weak magnetic amplitudes at the sensor position such as: – solid state switches, – contactless solutions to replace micro switches, – position and end point detection, and – rotating speed measurement. Fig. 4–17: Definition of magnetic switching points for the HAL579 Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 3.75 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. 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 Current consumption IDDlow BHYS IDDhigh BOFF BON 0 B Parameter On point BON Off point BOFF Hysteresis BHYS Magnetic Offset Unit TJ Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. −40 °C 5.5 12.0 18.5 −18.5 −12.0 −5.5 16.0 22.0 28.0 −7.0 0.0 7.0 mT 25 °C 5.5 12.0 18.5 −18.5 −12.0 −5.5 16.0 22.0 28.0 −7.0 0.0 7.0 mT 100 °C 5.5 12.0 18.5 −18.5 −12.0 −5.5 16.0 22.0 28.0 −7.0 0.0 7.0 mT 140 °C 5.5 12.0 18.5 −18.5 −12.0 −5.5 16.0 22.0 28.0 −7.0 0.0 7.0 mT |
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