Products, Materials & Tools | Apr 06, 2010

Heat Sinks from Fischer Elektronik Allow Excellent Thermal Management of Sharp LEDs

Although LEDs are clearly more energy efficient than light bulbs, which convert around 95% of current into heat and not into light, LEDs also waste a considerable amount of heat.

Unlike in traditional light bulbs, this is not emitted as radiant heat but has to be dissipated through heat sinks. Without additional cooling measures, temperatures sometimes reaching well over 100°C would destroy LEDs. The dimension of the heat sinks depends on the number of the LEDs installed on the supporting substrate and the power they consume.

Unlike other manufacturers, Sharp (Hall 4.2, Booth J71) does not refer to the non-measurable junction temperature of the LED, but to the measurable temperature of the substrate. At a substrate temperature of 80°C, all Sharp LEDs have a specified service life of 40,000 operating hours.

The supporting material used by Sharp for almost all its high power LED products is high quality ceramic. This allows an efficient dissipation of heat and helps to keep the size of the required heat sinks to a minimum, thanks to its good heat conductivity properties. Although standard heat sinks are freely available on the market, the shape of cooling elements may be chosen at will as long as they guarantee the required heat dissipation. For this reason, heat sinks can also be used specifically as design elements when creating LED lamps.

Fischer Elektronik has developed concepts which are specially adapted to the constantly growing demand for LED heat sinks. In addition to many standard heat sinks which can be used to dissipate heat from the LEDs, it also offers specially modified heat sink variants for LEDs and versions which are specially adapted to individual Sharp LED products.

With its standard portfolio, Fischer Elektronik already offers a comprehensive range of different types of aluminium heat sinks which can be installed in many popular housing models used in the lighting industry.

The LEDs are fixed to the heat sink using either double-sided, heat conductive adhesive film or a suitable thermal adhesive. Additional safety can be achieved by using optional screw fittings. The standard surface finishes are anodised in black or natural.

When considering the overall system of a light, Fischer Elektronik closes an important gap, using its expertise in application-related heat management to complete Sharp's LED partner network. In addition to the standard heat sinks it offers, Fischer is also considered a specialist for customised modifications and special designs.

The product experts at Fischer Elektronik are at your disposal for any requests and further information.

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