Design & Applications News

Football fans of the University of Michigan kicked off the 2011 season enjoying a new look to Michigan Stadium, now complete with newly upgraded scoreboards from Lighthouse Technologies.

Just west of Chicago, The Cermak Plaza is changing with the times.

Supertex, Inc. today introduced HV9861A, an open loop, average current mode control, LED driver integrated circuit (IC) designed to drive LEDs using a buck topology.

Verbatim announces an OLED module that lighting designers, artists, engineers, and architects can use to quickly and easily implement the creative lighting schemes using the company's VELVE OLED (organic light-emitting diode) panels.

Pushing LED brightness, color quality and consistency to new levels, Cree, Inc. announces another step in eradicating today's energy-wasting halogen light sources.

DDP has developed a unique solid-state LED lamp to replace 895 style incandescent bulbs used as door status indicators.

Cree, Inc. announces the commercial availability of high-voltage XLamp® XT-E and XM-L LEDs.

Integrating a high gain NPN transistor with a 30 V rated pre-biased NPN output transistor, the AL5802 linear LED driver from Diodes Incorporated provides a simple, cost effective and low EMI solution for controlling current in up to 9 low power series-connected LEDs.  With an open collector output capable of operating between 0.8 V to 30 V, the SOT26 packaged driver will support 12 V and 24 V power supplies and deliver LED currents between 20 mA to 100 mA for LED signs, lamps and automotive interior display applications.

The LED current is set via an external low value resistor, the one additional component required by the driver.  By generating a reference voltage of 0.65 V across the resistor, the internal high gain transistor helps minimize power losses and ensures supply voltage headroom.  The negative temperature coefficient of the reference voltage means that LED current is automatically reduced at high temperatures, thereby helping to protect LEDs and improve circuit reliability.

PWM dimming of the LED string is also simple to achieve by either driving the device bias pin with a low impedance voltage source or driving its enable pin with an external open collector NPN transistor or open drain N-Channel MOSFET.  The AL5802’s wide ambient temperature operating range of -40ºC to +125ºC enables it to be circuit mounted very close to the LEDs in space limited lighting applications.

The AL5802 30 V linear LED driver from Diodes Incorporated is available for $0.66 USD each in 1k quantities.  Further information is available at www.diodes.com

Harvard is pleased to announce that two new products to its innovative range of CoolLED drivers will be officially launched at Lux Live.

Cree, Inc. continues to extend the advantage of its innovative, industry-leading XLamp® LED family with the announcement of new levels of performance for its highly efficient XLamp XP-G LEDs, now delivering up to 140 lumens per watt.

OSRAM Opto Semiconductors has added three colors to its TopLED Black Series 60° beam angle portfolio.

Energizer is lighting up our lives in a whole new way with the launch of its household lighting collections, featuring distinct styles with thoughtful design features and advanced technology.

Switching at a frequency of up to 1 MHz and ensuring closely controlled rise and fall times, the AL8807 buck LED driver from Diodes Incorporated has been purpose designed to reduce EMI issues in the lower cost MR16 LED lamp market.

Verbatim announces two new LED lamps designed for the most popular UK sockets, the B22 bayonet fitting.

Developed for large interior spaces such as lobbies, atriums, convention centers and more the Lumenbeam LBX Pendant offers a greener, cost effective and design savvy alternative to conventional, maintenance intensive HID pendants or downlights.

More and more flexibility is needed for the light sources used in headlights, the “eyes” of any vehicle.