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LED driver What is an LED driver? Search results

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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.
total search906 articles
2006-06-01 Small-footprint device eases high-power LED driving
Zetex's mini LED driver requires a single external resistor to set its output current, simplifying LED driving.
2007-05-11 Small LED drivers target portable apps
Micrel Inc. claims to have developed the industry's tiniest and most powerful LED driver for portable applications that enables designers to enhance integrated cameras with a high-brightness LED flash while keeping board space and battery life to minimum levels.
2010-08-26 Small dot-matrix LED driver boasts power savings
austriamicrosystems' AS1119 dot-matrix LED driver requires small space, longer battery life, smoother animations
2005-09-02 Sipex LED driver drives multiple LEDs from 16V input voltage rail
Sipex unveiled a linear constant current LED driver that is designed to drive multiple LEDs in series from a high input voltage rail (16V max).
2013-02-18 Shifting from CCFT- to LED-backlit LCD modules
Learn about the various advantages of LED backlights over cold cathode fluorescent tubes for displays
2009-08-25 SEPIC backlight LED driver
This is a reference design for a SEPIC/linear LED-display backlight driver for eight parallel strings of 8 white LEDs at 70mA/string.
2012-12-18 Semtech unveils HB LED driver platform
The SC5014 and SC5014A use a tiny, 2.2æH, 1mm height inductor that the company said enables the design of ultra-thin displays while extending battery life.
2009-08-27 Selecting HB LED drivers for automotive lighting applications
This application note provides an overview of HB LED driver selection criteria for automotive lighting applications.
2004-07-16 Selecting and designing a LED driver
The article analyzes the choices, constraints and trade-offs on selecting white LED drivers for portable consumer devices
2013-01-29 Save power in LCD TVs with LED driving techniques
New design techniques in LED driver circuits promise to deliver significant energy savings that will go a long way to helping TV manufacturers meet the tough requirements for power consumption.
2003-07-21 ROHM infrared module includes driver LSI
ROHM Co. Ltd has developed the RPM882-H7 IrDA infrared comms module that incorporates a built-in LED driver, and remote control transmission function.
2005-04-29 RichTek LED driver chips target mobile handsets
Chip maker RichTek Technology Corp. announced it has developed four new white LED driver ICs that are suitable for mobile handset backlights.
2008-11-13 RGB LED drivers manage 7 LEDs in series
Tokyo Electron Device Limited has launched TE7118PF, an RGB LED control driver ideal for LED control applications such as LCD backlights, indoor LED lighting, and LED illumination lights.
2007-07-20 RGB LED driver suits fun lighting in portable apps
ON Semi has designed a triple-output LED driver for tricolor RGB LEDs, ideal for fun lighting and enhanced LCD backlighting in portable applications.
2013-08-29 Reference design for dimmable LED spotlight
The DER-350, uses Power Integrations' LYT4317E, a member of the company's LYTSwitch-4 family of single-stage drivers, along with Cree's MT-G2 EasyWhite LEDs.
2009-05-20 Reference design for a 3S3P Rear Combination Lamp (RCL) LED Driver
This application note presents a reference design for a rear combination lamp (RCL) LED driver in a 3-series, 3-parallel (3S3P) configuration.
2009-11-27 Ref design eases high-efficiency LED apps dev't
ON Semiconductor GreenPoint reference designs that will speed and simplify the development of high-efficiency LED-based lighting applications
2012-10-04 RECOM reveals high power LED drivers
Aimed at street and outdoor lighting, the RACD100 and RACD150 series feature dual mode operation for either constant current or constant voltage.
2010-09-22 Quad-mode LED driver powers ultra-low-power applications
New LED driver features quad-mode charge pump for high peak efficiency
2009-05-28 PWM intensity control for the MAX6964 LED driver
This application note describes the unique features of the MAX6964 LED driver and how these features can be used properly in applications requiring intensity control. The application note also provides example programming routines showcasing the intensity-control selections for both master and individual port selections of the MAX6964.
2008-01-30 Programmable HB LED drivers enable greater versatility
Maxim's MAX16816 is a high-voltage, high-power HB LED driver that provides many user-programmable features through on-chip non-volatile EEPROM registers.
2005-08-25 Prema serial 12V-LED driver handles up to three LEDs
PREMA Semiconductor offers the new constant current driver PR4130 controlling up to three LEDs in series
2011-06-15 Power IC allows low cost, small size LED driver
Exclara has released the Exclara HVX family that enables low cost, small size LED driver solutions while improving efficiency, power factor and quality.
2011-02-15 PFC LED driver IC designed for space-constrained apps
iWatt debuts its first power-factor-corrected (PFC) LED driver IC with primary-side-regulated, leading- and trailing-edge-dimmable, AC/DC Digital PWM Controller.
2012-12-10 Options for powering LED luminaires
Workarounds required to meet the requirements of electromagnetic compatibility can harm the reliability and efficiency of power circuits in LED luminaires
2008-02-01 Opt for inductive converter LED drivers
Achieving the desired brightness in mid-size LCD panel applications requires LED drivers to deliver a regulated current to the LEDs across all operating conditions. Typically, two types of LED driver topologies may be used: capacitive charge pumps and inductor-based switching regulators. This article focuses on the inductive converter LED driver circuits delivering between one to six watts of power to the LEDs.
2010-10-08 Open-frame LED driver supports up to 90W
Phihong has developed a LED driver capable of providing 90W of power for application in indoor lighting. The Phihong PSM090-240P is an open-frame design power supply which enables ease of integration into interior lighting designs. The device is currently offered in a constant current of 3.75A with an output DC voltage range of 22.8~25.2V, made for any input line from input voltage range of 100-277V AC.

2003-01-23 ON Semi white LED drivers have serial-data input pin
The company's two white LED boost drivers feature the industry's first serial-data input pin that enables microcontrollers to control LED brightness
2006-11-09 ON Semi touts 'smallest' dual-output white LED drivers
ON Semiconductor's new dual-output white LED drivers for handheld and consumer applications, said to be the industry's smallest, achieve up to 87 percent peak efficiency with 0.2 percent LED-to-LED matching
2009-08-26 Offline LED driver reference design
This application note presents a reference design for a non-isolated LED driver intended to operate directly from a 400VDC input.
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