IR emitters deliver higher radiant intensity in smaller footprint

Vishay Intertechnology, Inc. has extended its optoelectronics portfolio by releasing eight new AEC-Q102 qualified 850nm and 940nm high-power IR emitters that deliver best-in-class radiant intensity in 3.4mm x 3.4mm surface-mount packages. Built on the company's Astral surface emitter chip technology, the Vishay Semiconductors devices are designed for high drive currents up to 1.5A DC and 5A pulsed in automotive applications.

Featuring a double-stack chip, the IR emitters deliver a high typical radiant intensity of up to 6000mW/sr at a 5A pulse current and 2000mW/sr at a 1.5 DC current, which is 10% higher than the closest competing device. These values increase illumination for better contrast while minimising the number of components required, lowering costs and saving space. For further space savings, the emitters' compact surface-mount packages with lenses occupy a 20% smaller footprint than competing devices.

The IR emitters are excellent for ADAS, driver and cabin monitoring systems, eye tracking, and CCTV. The 940nm devices are created to suppress the red glow effect for these applications, while the 850nm emitters supply a better match with cameras. To meet varying fields of view across different applications, the devices are offered with four angles of half intensity: ±28°, ±40°, ±60°, and ±75°.

The emitters operate over a temperature range from -40C to +125C and provide low thermal resistance from 5K/W to 9K/W, which delivers optimised thermal management and enables their high drive currents. RoHS-compliant, halogen-free, and Vishay Green, the devices support lead (Pb)-free reflow soldering. The IR emitters provide high ESD immunity up to 5kV in accordance with ANSI/ESDA/JEDEC JS-001, a floor life of 168 hours, and a moisture sensitivity level of 3 in accordance with J-STD-020E.