1W of infra red light from an LED
Osram has stacked two die to produce almost 1W of infra red light from an LED, writes our technology editor, Steve Bush.
“With its 1mm2 thin-film chip stack, at a driving current of 1A it generates almost twice the output of the standard chips that have been used up to now,” claimed Osram.
“Preferred applications are those which require high radiance so that small optics can be used. This is important, for example, in pedestrian protection systems and night vision systems in vehicles.”
The device is part of the firm’s Platinum Dragon series, and has the same package so that existing designs can be used without modification.
1W output from 1A input comes at a forward voltage of 2.9V.
Emission wavelength is 850nm, “a compromise between maximum spectral sensitivity for CCD and CMOS cameras, and suppressed visibility for the human eye”, said the firm.
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