Allegro MicroSystems has released a new series of white multichip LEDs that can be used in general lighting applications, amusement and gaming equipment, and for backlighting TFT displays. Each module combines eight LEDs in two separate channels. Modular design allows the SEPW devices to be easily assembled into string arrays by simply connecting the modules in a series. The devices also provide superior colour balance throughout the display because of the high density of LEDs that can be achieved. This minimises the distance that power and control lines must run between LED modules and from the LED modules to the control electronics.
The white thermoplastic case is an innovative design with exceptional heat dissipation properties. The white resin compound is formulated for superior reflectance and transmittance of the generated light. Enhanced thermal dissipation is achieved through the incorporated heatsink on the bottom of the package. The heatsink can be mated directly to an external radiator through the PCB for superior heat conduction, allowing dense placement of modules. The leadframe is plated with silver, providing a highly-reflective surface for the bottom and sides of the emitting area. The terminals and heatsink are also silver-plated.
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