ATS137 datasheet(6/10 Pages) DIODES

6 / 10 page

ATS137

SINGLE HALL EFFECT SWITCH

ATS137 Rev. 4

6 of 10

FEBRUARY 2007

www.diodes.com

Application Information (Continued)

Vo will turn on (low) if the S magnetic flux larger than the operation point (Bop), and turns off whenever the magnetic flux is removed and

lower than the release point (Brp). The related waveforms are shown in Fig.3.

Bop

Brp

Vce(SAT)

VCC

Magnetic Flux (mT)

Marking Side

(SIP3)

Marking Side

(SC59 )

Fig.3 VO and Magnetic Flux Variety

The major applications are for contactless switching and shown as follows:

•

VCD/DVD loader, CD/DVD ROM: Detect if the tray is opened or closed.

•

Cover detector (open/close): Cellular phone cover detector, refrigerator door detector, microwave oven door sensor, etc.

•

Home safety: instead of reed relay to detect the situation of door/window.

•

Due to contactless and without mechanical contact point, its reliability and life cycle are much longer than reed relay. In

addition, its switching speed is much faster than mechanical devices.

ATS137 Datasheet(PDF) 6 Page - Diodes Incorporated