HAL525 데이터 시트보기 (PDF) - Micronas

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HAL525

Hall-Effect Switches

Micronas 

DATA SHEET

HAL 525, HAL 526

4.2. HAL 526

The HAL 526 is a latching sensor (see Fig. 4–5).

The output turns low with the magnetic south pole on

the branded side of the package and turns high with

the magnetic north pole on the branded side. The out-

put does not change if the magnetic field is removed.

For changing the output state, the opposite magnetic

field polarity must be applied.

For correct functioning in the application, the sensor

requires both magnetic polarities (north and south) on

the branded side of the package.

Magnetic Features:

– switching type: latching

– low sensitivity

– typical BON: 14 mT at room temperature

– typical BOFF: −14 mT at room temperature

– operates with static magnetic fields and dynamic

magnetic fields up to 10 kHz

– typical temperature coefficient of magnetic switching

points is −2000 ppm/K

Applications

The HAL 526 is an optimal sensor for applications with

alternating magnetic signals such as:

– multipole magnet applications,

– rotating speed measurement,

– commutation of brushless DC motors, and

– window lifter.

Output Voltage

VO

BHYS

BOFF

0

BON

VOL

B

Fig. 4–5: Definition of magnetic switching points for

the HAL 526

Magnetic Characteristics at TJ = −40 °C to +140 °C, VDD = 3.8 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

TJ

−40 °C

On point BON

Min. Typ. Max.

11.8 15.8 19.2

Off point BOFF

Min. Typ. Max.

−19.2 −15.8 −11.8

Hysteresis BHYS

Min. Typ. Max.

27.4 31.6 35.8

Magnetic Offset

Min. Typ. Max.

0

Unit

mT

25 °C 11

14

17

−17

−14

−11

24

28

32

−2

0

2

mT

100 °C 8

11

15.5 −15.5 −11

−8

18.5 22

28.7

0

mT

140 °C 6.5

10

14

−14

−10

−6.5 16

20

26

0

mT

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

Micronas

Nov. 30, 2009; DSH000144_003EN

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