Magnetic sensors boast high reliability
Switching-output magnetic sensors detect the opening and closing of the covers of mobile telephones and notebook PCs and other devices
New from Alps Electric, HGD Series switching-output magnetic sensors detect the opening and closing of the covers of mobile telephones and notebook PCs and other devices. The mechanism for detecting the opening and closing of mobile telephones or notebook PCs, or the doors or lids of refrigerators or washing machines, can be broadly divided into the switch detection method and the magnetic sensor detection method.
Recently, most mobile telephones are of the folding type, with an increasing trend toward more compact and thin models.
In addition, more complex construction designs such as swivelling liquid crystal display screens are being made continuously in an effort to accommodate a diversity of potential applications.
The shape and construction of mobile telephones calls for parts that are not just small and compact, but that cater to a high degree of engineering flexibility.
This product uses a magnetic sensor with high-reliability magnetic elements, which can detect the opening and closing of folding mechanisms as well as doors and lids.
These high-reliability magnetic elements can sense over a wider area and with higher reliability compared with other magnetic elements.
By association the field of magnetic sensors is also extended contributing to engineering flexibility in product design.
In addition, magnetic field sensing is available in three variations: one-way only magnetic field sensing (single polarity/single output); two-way magnetic field sensing in either direction, output through one signal type (dual polarity/single output); and bipolar magnetic field sensing in either direction, each with its own output signal (dual polarity/dual output).
The HGD Series comes in two types: the industry's smallest mould allay package (MAP) type, on which terminals are positioned on the reverse of the component, and; the small outline nonleaded (SON) type, on which terminals extend from the side of the component for easier mounting.
The versatility provided by these two types can better accommodate a variety of product functions and designs.
Furthermore, the high-reliability magnetic elements maintain high signal output in comparison with other magnetic elements.
As a result, the HGD Series mounted signal processing circuit can be restricted to an absolute minimum, contributing to reduced current consumption and the effective use of space.
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