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LED drivers 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 search577 articles
2003-12-16 Zetex LED drivers add true analog dimming
Zetex has launched what it claims is the first white LED driver with the option of an integrated true analog dimming mode, offering a noise-free alternative to pulsed dimming control
2007-04-24 White LED drivers suit dual-display phones
Suited for dual-display architectures including clamshell phones, the SP6415 white LED driver from Sipex can be configured to automatically turn off the sub-display when the phone is open
2007-06-20 White LED drivers offer 90% efficiency
Vishay Intertechnology Inc. releases two new 1.25MHz current-mode boost converters optimized for white LED applications
2006-03-31 White LED drivers feature dual-gain architecture
National Semiconductor introduced three new inductorless white LED drivers for display backlighting in cellphones, PDAs, portable gaming devices and MP3 media players.
2006-08-16 White LED drivers enable independent brightness control
National's new highly integrated, charge-pump-based, constant-current white LED drivers are suited for single- or multidisplay backlighting in portable consumer products and handsets.
2007-11-16 White LED driver features auto brightness adjustment
ROHM has begun sampling the BD6095GUL, touted to be first white backlight LED driver capable of automatic brightness adjustment of LCD backlights based on ambient brightness
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
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.
2010-02-04 Two-string HB LED driver packs complete fault protection
Maxim Integrated's MAX16838 two-string HB LED drivers is able to optimize conversion efficiency and provide complete fault protection and allow a 5000:1 dimming range.
2009-12-18 TSMC unveils BCD process for LED drivers
The new technologies feature a voltage spectrum running from 12V to 60V to support multiple LED applications
2010-04-13 Touch sensor ICs come with integrated LED drivers
Semtech Corp. has launched the SX864x platform of capacitive sensing ICs that come in eight- and 12-channel models and feature integrated LED drivers.
2007-07-30 Tiny white LED drivers suit entry-level handsets
AnalogicTech has released the AAT3193, the first in a family of two- and three-channel, charge pump-based white LED drivers for entry-level handsets.
2007-05-28 Tiny LED drivers tackle high-power tasks
Operating under a 6-60V input supply and achieving up to 95 percent efficiency, the ZXLD1362 from Zetex Semiconductors can drive up to 16 high power LEDs with an adjustable output current of up to 1A.
2006-12-14 Tiny flash LED driver suits advanced handsets
California Micro Devices has unveiled a new family of PhotonIC white LED drivers capable of supporting a wide range of high-current flash LEDs in advanced handsets.
2012-03-29 TI's LED driver boasts primary side sensing, PFC
The TPS92310 AC/DC constant current driver for non-dimmable LED lighting that aims to reduce cost and shrinks-to-fit high-power LED retrofit bulbs including A19, PAR30/38 and GU10
2008-05-09 TI tips wireless remote control LED design kit
TI's new wireless remote control LED design kit, composed of the TPS62260LED board plus the eZ430-RF2500 development tool, completes a fully supported platform to design color lighting innovations for consumer, commercial, professional and architectural applications
2005-12-05 Supertex LED driver IC with wide input voltage range
Supertex unveiled a new LED driver IC designed to provide high LED current accuracy and a very wide input voltage range of 9V to 250V. Target applications include RGB backlighting, automotive lighting, and battery powered LED lamps
2005-08-05 Supertex LED driver IC delivers 30mA regulated output current
The new 3-pin switch-mode LED driver IC with a regulated output current of 30mA from Supertex can be operated from either a rectified universal AC line range of 85Vac to 264Vac or 20Vdc to 400Vdc
2013-06-10 SSL extends lifespan of LED bulb
Solid-state lighting can lengthen an LED bulb's lifetime by managing internal thermal conditions in closed lighting fixture
2007-09-06 Small WLED drivers tout 92% efficiency
Maxim Integrated Products had released the MAX8901A/MAX8901B claimed to be the smallest, highest efficiency white-LED (WLED) drivers, achieving up to 92 percent efficiency.
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
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
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
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
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.
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
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