ATS137 Ver la hoja de datos (PDF) - Anachip Corporation
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ATS137 Datasheet PDF : 8 Pages
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Single Hall Effect Switch
ATC
ATS137
Application Information (Continued)
Vo will turn on(low) if the S magnetic flux larger than operation point (Bop), and turns off whenever the
magnetic flux is removed and lower than release point (Brp). The related waveforms are shown in Fig.3.
magnetic flux (mT)
Bop
S
S
Brp
Marking side
t
Vo
Marking side
N
N
Vcc
( SOT23 ) ( SIP3 )
Vce(sat)
t
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.
Anachip Corp.
www.anachip.com.tw
Rev.1.1 Jan. 09, 2006
5/8
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