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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
2002-03-18 Maxim four-digit, 5-by-7 matrix LED driver saves power
The MAX6953 LED display driver and controller from Maxim Integrated Products interfaces microprocessors to cathode-row 5-by-7 dot-matrix LEDs.
2003-04-29 Maxim driver powers six white LEDs
The company's MAX1582 driver powers up to six white LEDs in series with a constant current
2009-04-24 MAX6960 programming guide for large LED displays
This application note details how multiple MAX696x 8 x 8 matrix LED drivers can be arranged and programmed to support larger LED displays or dot-matrix elements
2013-11-20 Match LED driver architecture with the application
Read about LED driver architectures and their impact on the performance of a lighting application.
2014-04-01 Marvell bares LED controller for smart wireless light bulbs
Marvell's 88EM8189 chip offers I2C compatible digital interface integration, low standby power and compatibility to phase cut dimmers.
2007-08-09 Low-noise driver powers nine cellphone LEDs
Linear Technology's LTC3219 low noise LED driver for cellphone displays and lighting provides nine individually configurable current sources for main, sub- and RGB displays.
2009-07-23 Low-loss LED driver improves a system's green footprint by boosting efficiency and extending battery life
Because many systems are battery powered, energy efficiency is key to maximizing each battery charge and the system's operating time. By improving battery efficiency, you also improve the system's "green" footprint.
2007-04-12 Low-dropout LED driver targets power-conscious portables
Addressing the migration of white LEDs to lower forward voltages, Catalyst Semiconductor has introduced the CAT4004, a four-channel low-dropout driver designed for power-conscious portables where the LEDs are driven directly from the battery
2011-03-23 LM3444-230VAC, 8W isolated flyback LED driver
This demonstration board highlights the performance of a LM3444 based flyback LED driver solution that can be used to power a single LED string.
2011-03-21 LM3444-120VAC, 8W isolated flyback LED driver
This demonstration board highlights the performance of a LM3444 based flyback LED driver solution that can be used to power a single LED string.
2008-10-21 LM3433 4A to 20A LED driver evaluation board
The LM3433 is an adaptive constant on-time DC/DC buck constant current controller designed to drive a high brightness LEDs (HB LED) at high forward currents
2008-11-06 LM2755 charge pump LED controller with I?C compatible interface in ?SMD
The LM2755 is a charge-pump-based, constant current LED driver capable of driving 3 LEDs with a total output current up to 90mA.
2005-08-15 Linear Tech LED driver can drive up to 17 LED current sources
Linear Technology announced a fully integrated, 850kHz, low noise, high efficiency 1x/1.5x/2x charge pump multi-display LED driver.
2013-07-03 Lighting tops cell phones as largest LED driver sector in 2013
The market for LED driver ICs in LED lighting is set to grow to $323 million this year, up from $214 million in 2012, while cell phones will only have a revenue of $316 million, noted IHS.
2008-03-07 Leynard puts up giant LED panels at Olympics site
Beijing Leyard has completed the installation of five LED panels at the Olympic Cultural Squares in Beijing, with each panel measuring around 100m?
2005-06-10 LED-driver considerations
This app note discusses LED-driver considerations features and how they are achieved, and conclude with a typical circuit that implements each of these features.
2009-06-05 LED solution tailored large-panel TVs
Microsemi Corp. has launched the LX24132 32-port LED backlight controller and LX23108L 8-port LED driver.
2011-08-30 LED reference design meets commercial power requirements
Power Integrations' reference design for a 25W LED T8 tube ballast power supply meets commercial requirements for power factor and harmonic distortion
2009-12-14 LED pump drivers pack digital low-pass filters
Semtech Corp. has added two LED backlight charge pump drivers in its SC65x charge pump platform
2012-06-04 LED micro-module drivers ease lighting design
Texas Instruments' 450mA TPS92550 and TPS92551 DC/DC LED driver modules incorporate all the required power and passive circuitry into a single IC package to deliver up to 23W of power to the LED.
2010-09-29 LED lighting solutions for demanding applications on display
ON Semiconductor bares new products for wide range of LED needs
2013-05-16 LED lighting future getting brighter
The combined growth potentials of HB LEDs and high lumen LED lighting systems represent a significant increase in demand from today's deployment rate for both the LEDs themselves and for the LED driver ICs required to drive them.
2007-05-07 LED lighting driver delivers high power density
Providing an adjustable output current of 1A from an SOT23 package, the ZXLD1360 LED lighting driver from Zetex Semiconductors promises high power density for high-power illumination applications.
2010-07-26 LED lamp driver suits car solid-state lighting
Supertex Inc. rolls LED lamp driver ICs that are designed for solid-state lighting applications in automobiles, such as head lights, tail lights, indicator lights, dome lights, and panel backlights.
2011-07-25 LED IC support tool simplifies circuit design
Renesas' R2A20134EVB comes in six versions that target various configurations and eases the design of complex LED drive IC control circuits
2009-05-11 LED flash drivers offer design optimization
CAP-XX Ltd is introducing supercapacitor-optimized LED flash drivers from several power management IC companies to optimize the design of high-power LED flash units for high-resolution camera phones and digital cameras
2013-07-08 LED flash driver ups smartphone camera performance
The AS3630 can drive up to 8A current through an LED flash system, enabling mobile phone cameras to take pin-sharp images and supports substantially faster shutter speeds
2009-01-19 LED flash driver aims at high Mpixel camera phones
ON Semiconductor has developed a 4A supercapacitor LED flash driver dubbed CAT3224 for high megapixel camera phones and standalone camera applications.
2006-01-16 LED drivers, with staggered outputs, cut EMI
Allegro Microsystems' A6278 and A6279 LED drivers are touted to be the industry's only devices with a staggered delay (20ns on each output) to cut the effects of inrush current
2005-11-16 LED drivers with wide input-voltage range
The new MAX16801/MAX16802 high-brightness LED drivers from Maxim Integrated Products feature a wide input-voltage range
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