High-CRI ac LEDs beat dc LED efficacy, price
Working from 110 to 220-Vac power sources, the Acriche 4 ac LED has an efficacy (luminous efficiency) of 75 lm/W, surpassing competing dc LEDs. Further, the devices will cost 10% to 20% less than dc devices.
With a color-rendering index (CRI) greater than 85, the <1-W device can replace warm-white incandescent and compact fluorescent light sources in many consumer and commercial applications. The 3,000K A4 devices rely on multiple proprietary technologies to increase efficiency.
Unlike dc devices which require complex driver circuitry, the ac LEDs need only a simple, inexpensive diode bridge (full-wave rectifier). The A4 uses 50 Vrms per package, and 110 to 220-Vac operation can be achieved by connecting multiple devices in any manner needed. (Less than $1 ea/ prod qty — available this quarter.)
Seoul Semiconductor , Seoul , Korea
Doug Hardman 503-944-9890
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