ROHM High-Performance Infrared LEDs Are Ideal for Proximity Sensing

SAN DIEGO, Jan. 26, 2011 /PRNewswire/ -- A new series of high-performance infrared LEDs ideally suited for proximity sensor applications is now available from ROHM Semiconductor.  The SIM-030/031ST and SIM-040/041ST surface-mount IR LEDs feature breakthrough IR wavelength technology providing peak output of 850/870 nm, compared to 950 nm for comparable devices. The 850/870 nm level is much closer to the peak wave sensitivity of phototransistors (sensors), thus achieving higher efficiency proximity sensing and energy savings of up to 66%. In addition, the small package footprint and low-profile further enhance their application in cell phones and other portable devices.

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The SIM-030/031ST, the smaller of the two devices, has a 2.3 mm x 1.95 mm footprint and a height of just 0.9 mm.  With a forward current (If) of 100 mA, the device delivers typical emission strength of 30 mW/sr (milliwatts per steradian). The slightly larger SIM-040/041ST (3.1 mm x 2.25 mm x 1.6 mm) provides 40 mW/sr, typical emission strength.  

Field Application Engineer for ROHM Semiconductor, AviElmaleh, said, "The combination of ROHM's advanced process technology and packaging has resulted in a superior product for space-constrained proximity sensing. The SIM-030/031ST is the perfect choice for power saving in cell phones, turning off the display when the device is closer to the ear."

The ROHM SIM-030/031ST and SIM-040/041ST are the latest additions to the ROHM Optical Sensors Series of emitters, receivers, photointerrupters, tilt sensors, IrDA modules and remote control modules.

About ROHM Semiconductor:

ROHM Semiconductor is an industry leader in system LSI, discrete components and module products, utilizing the latest in semiconductor technology. ROHM's proprietary production system, which includes some of the most advanced automation technology, is a major factor in keeping it at the forefront of the electronic component manufacturing industry. In addition to its development of electronic components, ROHM has also developed its own production system so that it can focus on specific aspects of customized product development. ROHM employs highly skilled engineers with expertise in all aspects of design, development and production. This allows ROHM the flexibility to take on a wide range of applications and projects and the capability to serve valuable clients in the automotive, telecommunication and computer sectors, as well as consumer OEMs.

SOURCE ROHM Semiconductor

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