What is an LED driver?
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Regardless of type, size, or power, all LEDs work best when driven with a constant current source since LED colour changes with small variations in driving current. LEDs often support varying system voltages and forward voltages, which can cause variations in LED brightness and colour. An LED driver is a self-contained power supply that has outputs matched to the electrical characteristics of your LED or array of LEDs. There are currently no industry standards (as of 2009), so understanding the electrical characteristics of your LED or array is critical in selecting or designing a driver circuit. Drivers should be current-regulated (deliver a consistent current over a range of load voltages). Drivers may also offer dimming by means of pulse width modulation (PWM) circuits. Drivers may have more than one channel for separate control of different LEDs or arrays. |
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| 2004-12-21 | White LED driver boosts low-profile apps Allegro's new dc-dc boost converters offer a low-profile solution for driving up to four white LEDs in series from a 2.5V supply, or five white LEDs from a 3V supply. |
| 2005-12-20 | White LED delivers 12,000mcd at 350mA The new high brightness warm white LED from Dominant Semiconductors provides an incandescent-grade illumination. |
| 2010-01-06 | White LED deliver over 120lm/W SemiLEDs Corp. is offering its I-core LED that achieves over 120lm/W in an optimized white light package, as tested by two China LED packaging companies. |
| 2008-07-10 | White LED achieves 90 lumens at 250mA Toshiba America Electronic Components has developed the TL12W02-D, a high power, high brightness white LED that can provide a typical flux of 90 lumens when driven at only 250mA. |
| 2006-02-23 | White LED achieves 47 lumens/watt at 350mA drive current Cree Inc. announced general availability of what they claim to be the industry's highest efficacy white power LEDs at 350mA. |
| 2007-10-29 | WEBENCH ships LED/driver prototypes in 24hrs National Semiconductor's WEBENCH online design environment now extends to LEDs and touts a 'Build It!' feature that arranges for shipment of a custom prototype LED-and-driver kit within 24hrs. |
| 2012-11-02 | Web-addressable LED bulb signals arrival of IoT Is the Internet of Things already at hand in the form of a Phillips box, which is available for $199 at the Apple store? Peter Clarke share's his views on the emergence of IoT in LED light bulbs. |
| 2011-08-29 | Weak LED backlight demand slumps revenue With revenue falling by 20.5 percent, Taiwan LED makers are looking into lighting applications for a much-needed boost. |
| 2012-08-08 | Weak demand, poor economy hurt LED market Despite rush orders in Q2 that kept LED chip and package makers' utilization rates high, the Q3 outlook for LED backlight market turns murky due to the European debt crisis and the weak demand in China. |
| 2010-01-26 | Wai Chi opens new LED fab in Changzhou Production at the plant is aimed at 2 billion SMD and high-power LEDs, 20,000 LED lighting products and 80 million LED backlights annually. |
| 2011-05-11 | VLB assembler targeted for LED apps Europlacer has launched the iineo-II, a dual-head VLB assembler for LED commercial lighting applications. |
| 2007-05-15 | Visible LED Lab solution evaluates LED specs TT electronics Optek Technology's in-house visible LED laboratory features an array of equipment and other resources to accurately assess products ranging from single LEDs to complex power LED assemblies. |
| 2003-08-28 | Vishay LED provides 4,000mcd luminous intensity Vishay Intertechnology has announced that it has completed its ultra-bright TLCx5100 LED series with the release of the TLCW5100 device. |
| 2004-03-16 | Vikay LED with up to 3,500mcd luminous intensity Vikay has launched various types of LEDs that are suitable for a wide range of applications. |
| 2013-03-14 | UV LED market primed for huge 2012-2017 According to Yole Developpement, for the period from 2012 to 2017, the market volume will grow at an average rate of 43 per cent per year, with the main market drivers being curing applications. |
| 2008-04-17 | Utilizing a white LED driver to cost-effectively drive power-limited xenon flashes in digital cameras, camera Phones This paper depicts the basics of the xenon concept and details a typical low power/low cost flash application. |
| 2005-06-10 | Using the TPS61042 white-light LED driver as a boost converter Although designed to be a white-light LED driver, the TPS61042 can be configured as a discontinuous, hysteretically controlled boost converter with a 500-mA peak switch current. |
| 2007-02-19 | Using the MAX6951/MAX6950 LED drivers to communicate with MAXQ2000 This application note describes assembly language techniques for the MAX6951/MAX6950 LED drivers using the MAXQ2000's SPI peripheral. It also gives a sample code in the MAXQ assembly language that demonstrates how to use the MAXQ2000 SPI module to experiment with MAX6951/MAX6950 functions. |
| 2007-04-23 | Using the MAX6951/MAX6950 LED display drivers with SPI interface to communicate with the MAXQ2000 MCU This application note gives a sample code in the MAXQ assembly language that demonstrates how to use the MAXQ2000 SPI module to experiment with MAX6951/MAX6950 functions. |
| 2004-12-02 | Using the ATAR510 microcontroller as an LCD/LED driver This app note describes the attachment of an LCD and LED to the ATAR510 microcontroller. |
| 2003-12-20 | Using DS1050 Programmable PWMs to Control a DC Motor and an LCD LED Backlight This application note shows examples on how to use the DS1050 as a dc fan controller and as a backlight brightness controller for an LED backlit LCD. |
| 2004-06-24 | Unity Opto expects 30 percent growth in LED shipments Unity Opto Technology Co. Ltd is expecting shipments of LEDs for automotive applications to increase by over 30 percent this year. |
| 2004-08-03 | Unity Opto expands white LED capacity Unity Opto Technology Co. Ltd has disclosed plans on increasing its monthly white LED capacity to 30 million units this September from the current 10 million units. |
| 2009-08-28 | UMC unveils solar, LED plans United Microelectronics approved the establishment of a new business development center and an investment corp. |
| 2011-05-17 | Ultratech Taiwan R&D center focuses on HB-LED tech Ultratech announced the opening of its Asia Technology Center (ATC) in Taiwan that will provide leading-edge process development and in-depth demonstrations for the HB-LED manufacturing industry. |
| 2007-02-16 | Ultrasmall camera flash LED driver loads 700mA austriamicrosystems has launched an ultrasmall, fully integrated 700mA charge-pump-based flash LED driver. |
| 2007-07-11 | Ultramini LED replaces Xenon lamps in digicam flash Seoul Semiconductor has launched a super-bright, ultramini flash LED that it says will replace Xenon lamps that are typically used as flash light sources in digicams or 5Mpixel camera phones. |
| 2007-03-30 | Ultracompact LED suits mobile phone keypads Rohm has introduced an ultracompact LED in a 0.04 x 0.02-inch footprint for devices that require ultracompact components such as mobile phone keypads, small dot-matrix units and compact seven-segment display devices. |
| 2005-02-23 | Ultra-bright LED lamps light up traffic signals, auto apps Para Light launched an extensive line of high-power LED lamps that can handle a forward current as high as 70mA to produce exceptional brightness. |
| 2005-04-15 | Ultra-bright LED comes in SMT package Vishay Intertechnology says its new ultra-bright, low-current LEDs are the industry's first to meet demand for high brightness in a miniature 0603 size surface-mount package. |
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