LED modules from Sharp can replace 50W HID lamps
December 16, 2011 // Christoph Hammerschmidt
New LED modules from the new Mega Zeni series from Sharp reach an efficiency of up to 100 lm/W, a luminous flux of up to 4770 lm and are available with a (typical) CRI value of up to 93. They are thus one of the first industrial LED solutions to replace traditional 50W HID lamps.
The 50W Mega Zeni models from Sharp maintain the same dimensions and high CRI values, yet with considerably greater luminous fluxes. These have a luminous efficiency of between 3590 and 4770 lm, a light output of up to 100 lm/W in standard operating mode and a service life of 40,000 hours at an operating temperature of up to 90C. The new Mega Zeni modules are designed for a forward voltage of 50V and a forward current of 950 mA, but can also be operated with a standard power source of 1050mA. Other important features include: R9 values of over 85 with CRI values of over 90, MacAdam 3-step Ellipse binning, as well as good colour consistency and colour stability values over time under realistic operating conditions (hot lumen).
The 50W LED array launched by Sharp can thus replace traditional HID lamps in the same performance class. Compared to halogen lamps, the service life of 40,000 h of the LED array is notably longer and has a much lower decrease in brightness over time.
The serial and parallel array of the LED matrix ensures fail-proof operation while offering the lowest possible thermal emission. The flat surface of the ceramic plate and the soldering points already in place make it possible to attach the modules to a suitable heat sink without too much effort or additional connecting material, thus guaranteeing excellent heat dissipation. The electrical wiring also leads to lower thermal stress of the single LEDs, because the heat is evenly distributed and dissipated across the entire surface of the matrix. The round light emitting surface (LES) consists of a total of 160 LEDs, sub-divided into ten parallel-connected rows of sixteen. In the Mega Zeni series, this LES is fitted evenly with LEDs up to the edge, through which the optical design of a lamp can be considerably simplified. The formation of multiple shadows can be avoided, and at the same time it is easier to focus the optics (lens, reflector) on just one light emitting surface. The slim design of the new Mega Zeni, measuring just 24 x 20 x 1.8 millimetres, together with its small LES, also increases design flexibility, as it is possible to produce smaller optics and ultimately smaller lamps.All news
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December 15, 2011 | Texas instruments | 222901974
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