Plessey, a leading expert in the manufacture of lighting and sensing products and components, is building on the success of its PLW7070 high power LED range, launched six months ago, by targeting handheld and portable lighting applications. When lighting is dependent on battery power, the benefit of a single-chip that can outperform the standard four-chip by 30 per cent is clear to see.
Plessey LEDs utilise its MaGIC GaN-on-Silicon technology to provide best-in-class high-power LED components and system-level lighting solutions, from blue die through to complete luminaires. With the PLW7070, Plessey has developed a single-chip, high-voltage LED design that not only achieves better thermal performance and dramatically reduces cost, but delivers 30 per cent more light output from an industry-standard 7070 footprint when using standard secondary optics, compared to existing four-chip solutions.
The increased output is achieved by using a unique integrated multi-junction die architecture that eliminates the shadowing effects created when using a multiple die approach. Furthermore, a low thermal resistance, less than 2°C/W, and a high maximum junction temperature of 135°C allow advanced thermal management that in turn ensures greater reliability and enables the PLW7070 to maintain its high luminous flux over the widest possible temperature range.
The GaN-on-Silicon multi-junction, single-chip design also sets a new benchmark in far-field imaging and the use of secondary optics in narrow beam angle applications, such as torches and portable lighting. Offered in 12V and 24V versions and operating from input currents from 350mA to 3A, Plessey’s PLW7070 LEDs provide output powers from 1W to 15W and are available with a full range of CCT and CRI options. The devices are supplied in a custom Aluminium Nitride ceramic package that has an industry standard solder pattern and footprint. A domed silicone lens provides a 120-degree wide viewing angle, while in-built ESD protection ensures stable yield throughout system manufacture and subsequent operation.
Commenting on potential applications, Giuliano Cassataro, Plessey’s director of sales, said: “Plessey’s high-power LEDs set the bar for performance in low-cost, single-chip LEDs for demanding outdoor and commercial lighting applications. Specifically, the PLW7070 range provides a differentiated solution that is particularly suited to portable torches and lamps but is equally applicable for spot-lighting and down-lighting, and even high-bay and floodlighting requirements. Where Plessey challenges more established LED vendors is in being able to offer a single-chip solution that provides 30 per cent more light output than standard 4-chip designs at half the cost.”