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What is an LED driver?
Regardless of type, size, or power, all LEDs work best when driven with a constant current source since LED color changes with small variations in driving current. LEDs often support varying system voltages and forward voltages, which can cause variations in LED brightness and color.
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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2012-02-09 LED drivers with PWM dimming for LCD backlight
The HV9989 is powered by a built-in 40V linear regulator and has three 1MHz transconductance amplifiers.
2005-11-01 LED drivers with industry-standard SPI-compatible serial interface
Maxim introduced the MAX6971/MAX6983 16-port and the MAX6970/MAX6980/MAX6981 8-port constant-current LED drivers that all feature a 25MHz, 4-wire, industry-standard SPI-compatible serial interface
2006-07-03 LED drivers with 0.6mm profile suits portable apps
ON Semiconductor has introduced three new white LED drivers with 0.6mm profile designed for backlighting in portable apps
2005-04-06 LED drivers with 'smallest' footprint
National Semiconductor's three new charge-pump-based white LED drivers feature a tiny chip-scale 18-pin micro SMD package, providing one of the smallest footprint in the industry
2008-08-07 LED drivers tout completeness
Recom Electronic GmbH offers a complete solution of LED drivers with the RCD-24-x.xx series
2008-11-18 LED drivers target high-visual impact lighting apps
ON Semiconductor has expanded its line of constant-current, low dropout driver products with two new high-brightness RGB LED pixel drivers.
2010-02-16 LED drivers tailored for solid-state lighting apps
Marvell Semiconductor has unveiled the 88EM8080 family of high-performance, low-cost and high-reliability controllers for LED lighting applications
2006-06-02 LED drivers simplify design of indoor/outdoor display signs
The new constant-current LED drivers from Maxim Integrated Products simplify the design of large RGB indoor/outdoor LED display signs
2010-10-06 LED drivers promise more vibrant LCD TV images
austriamicrosystems says new LED driver ICs more efficient, offer fine control over brightness
2009-07-03 LED drivers promise flexibility, ease-of-use
Micrel Inc. has unveiled a new series of high-brightness that target solid-state lighting applications.
2007-02-19 LED drivers promise efficient heat management
ERG's Smart Force LED driver solutions promise efficient thermal management to ensure reliability for the increasingly stringent demands of many LCD applications.
2011-10-14 LED drivers operate from 50-150W
XP Power's DLG series is waterproof to a depth of one meter and accommodates input voltage range from 90-305VAC.
2011-06-29 LED drivers offer intelligent lighting control
Atmel's LED driver family, which provides intelligent control for backlighting and solid state lighting markets, offers power efficiency, flexible dimming features, user programmability and lower BOM.
2005-07-11 LED drivers offer 80% efficiency
The two new white LED drivers from Vishay Intertechnology promise to deliver efficiencies of up to 80 percent during operation in compact handheld and battery-operated electronics
2011-11-03 LED drivers offer 3% current accuracy
Supertex's HV9861A targets solid-state lighting applications and requires no loop compensation or high-side current sensing.
2008-06-26 LED drivers manage lighting in handsets
Advanced Analogic Technologies has announced the AAT2860, an I?C-based lighting management unit that integrates up to seven LED drivers and three low dropout linear regulators in a single IC
2009-11-25 LED drivers improve energy efficiency in LCD TVs
Intelligent control of LED current sinks in direct/matrix backlight applications gives truer blacks and improved contrast
2011-10-27 LED drivers improve 3D performance, power use
austriamicrosystems' LED ICs promise optimized 3D LED performance through smart dimming, and superior bandwidth and transient response
2007-12-11 LED drivers have optimized synchronization, timing
austriamicrosystems has extended its high-brightness LED driver portfolio with the introduction of the AS3693 and AS3694 devices, aimed at LED-based LCD backlighting applications.
2008-02-11 LED drivers for backlights extend mobile battery life
Leadis has started sampling a new family of charge-pump-based LED drivers that uses the company's PowerLite current regulator to deliver up to 95 percent power efficiency for longer battery life
2008-01-21 LED drivers fit for mid-size LCD panels
Catalyst Semiconductor has expanded its line of high-power LED drivers with a new device optimized for the rapidly growing mid-size LCD panel market
2008-01-22 LED drivers feature 16 constant-current output channels
Allegro MicroSystems has announced the release of two new LED driver ICs for use in displays, signs and control panels.
2011-07-21 LED drivers feature 0.2% channel-to-channel accuracy
austriamicrosystems' LED drivers that target edge- and direct-lit TVs boast optimized picture quality and built-in safety
2008-04-24 LED drivers enhance LCD backlight control, battery life
Catalyst's The CAT3647 and CAT3648 Quad-Mode fractional charge pump LED drivers address the need for high-resolution LCD control and longer battery life in cellphones, digital cameras and other handheld devices
2009-12-15 LED drivers enable multiple dimming options
XP Power's new family of LED drivers offers the voltage or resistance analog methods for dimming, as well as the pulse width modulation input signal
2007-11-14 LED drivers enable longer battery life
Leadis Technology has started sampling its new family of charge-pump based LED drivers featuring the company's proprietary PowerLite current regulator to deliver up to 95 percent power efficiency for longer battery life
2010-05-14 LED drivers eases single-cell apps design
Diodes has developed LED drivers designed to provide the simplest possible solution for driving low-power, high-brightness LEDs from a single solar or rechargeable battery cell
2009-12-17 LED drivers deliver low dropout voltage
The drivers are suited for HB LED photoflash for digital cameras, video cameras, cellphones, smart phones, flashlights and security light flashers
2010-06-16 LED drivers deliver flicker-free TRIAC dimming
Power Integrations has released two new families of power-factor-corrected LED driver ICs that deliver flicker-free monotonic TRIAC dimming.
2009-11-26 LED drivers cut power use in electronic signage
STMicroelectronics brings to market a new series of highly accurate LED drivers with automatic power saving
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