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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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2006-11-14 LED drivers address mercury-free requirement
Maxim said its new MAX16807-MAX16810 LED drivers are the first fully integrated, high-brightness devices that address industry needs for mercury-free, high-contrast lighting in displays.
2007-08-10 LED drivers add 1.33x pump mode
Leadis Technology's LDS8842 and LDS8830 new charge pump-based LED drivers feature a highly efficient 1.33x-mode enabled charge pump.
2005-03-31 LCD drivers suit large displays
The two 16-channel, constant-current sink LED drivers from TI support complex power requirements needed by LEDs in large display electronics.
2005-08-16 Latched sink drivers deliver flexibility through MOS, bipolar mix
Allegro Microsystems offers the A6800/01, A6821/41, and A6832/33 latched sink drivers for LED displays, gaming and medical systems.
2005-03-29 Laser diode drivers provide 700mA output current
The two new laser diode drivers from Atmel support DVDRW/CD-RW combo drives with up to 16x writing speed for DVDRW and 52x for CD-RW.
2011-08-04 Large-signal specifications for high-voltage line drivers
Here's a discussion on the significant ac parameters such as large-signal bandwidth and distortion, and how they are related to each other.
2003-12-09 Landersound drivers with 4, 8 ohms impedance
Landersound Ind. Co. Ltd has released its PTQ-13, PTQ-14, PTQ-15, PTQ-16, PTQ-17, PTQ-18 and PTQ-19 piezo tweeter drivers that are suitable for multimedia applications, and feature 4 ohms or 8 ohms impedance. The PTQ-13 and PTQ-14 have a frequency range of 3.5Hz to 20kHz, sensitivity of 93dB (1W/1M), and maximum power rms of 75W or 150W. The
2006-06-30 Lamp drivers 'significantly' extends EL lamp life
Supertex rolled out two new high brightness, low noise, EL lamp drivers, designed to light up dual display cellular phones, portable instrumentation and other handheld devices.
2000-06-20 L638X high voltage drivers family application guide
This application note presents various design strategies that highlight the versatility and flexibility of the L638X family of high-voltage gate drivers. These design implementations include three-phase motor control, dimmable lamp ballast, horizontal deflection stage, two-switch forward converter, asymmetrical half bridge, and H-bridge with cycle-by-cycle control.
2006-10-02 IVI drivers ease programming of data conversion apps
Acqiris said its new IVI drivers, available at no charge, provide a set of standard commands for a given class of instruments that simplify programming and instrument swapping among data conversion products.
2005-08-19 Intersil PWM controllers include high-current MOSFET drivers
Intersil announced the two-phase ISL6310 and three-phase ISL6308 pulse width modulation controllers with high-current, integrated MOSFET drivers and industry-leading system accuracy.
2004-02-18 Intersil PWM controller has MOSFET drivers
Intersil has released its Endura ISL6420 single-phase synchronous-buck PWM controller with integrated MOSFET drivers.
2003-10-24 Intersil PWM controller features MOSFET drivers
Intersil Corp. has announced the Endura ISL6563, a two-phase synchronous-buck PWM controller IC that integrates 2A MOSFET drivers in a 4-by-4mm QFN package.
2002-10-28 Intersil provides laser drivers to Hitachi DVD camcorders
Hitachi Ltd has selected Intersil Corp.'s laser diode drivers for its DVD camcorder products.
2001-04-24 Interfacing Maxim laser drivers with laser diodes
This application note is intended to briefly address the interface of laser driver circuits with commercially available laser diodes, with the goal of providing a useful reference for optical system designers that will simplify this process as much as possible.
2009-01-22 Interfacing LVPECL 3.3V drivers with Xilinx 2.5V differential receivers
This application note describes how to interface 3.3V differential LVPECL drivers with Xilinx 2.5V differential receivers.
2002-12-20 Interfacing Digitally Controlled Pots and Resistors to Laser Drivers
This application note describes the electrical interfaces between digitally controlled potentiometers and resistors, and laser drivers.
2013-09-04 Innovative LED drivers deliver energy savings
Researchers from Hong Kong created a driver that powers LED light bulbs with an approach called multi-level PWM, which delivers remarkable improvements in terms of light quality and energy efficiency.
2008-06-05 Inductorless, dual output LED flash drivers introduced
Leadis Technology Inc. has started sampling the LDS8620 and the LDS8621, a new family of inductorless 200mA, dual-output LED flash/lamp drivers, in low-profile (0.8mm), space-saving 3mm x 3mm TQFN packages.
2005-06-08 Individual LED intensity control with MAX6958/MAX6959 LED drivers
This app note details how to achieve pixel-level (individual LED) intensity control with the MAX6958 and MAX6959 LED display drivers.
1999-12-04 Increasing system ESD tolerance for line drivers and receivers used in RS-232 interfaces
In order to identify the source and type of EOS, a number of DS14C88 and DS14C89A devices were subjected to controlled Electrostatic Discharge - ESD (Electrostatic Discharge) events in the lab using a KeyTek Human Body ESD Simulator. Additional units were tested with PolyClamp ESD protection devices to determine their effectiveness and to demonstrate a possible solution for providing greater system ESD tolerance.
2013-04-04 Improving digital signage with LED drivers
As digital signage projects become ever more sophisticated, equipment designers must rely on LED driver ICs capable of satisfying the unique demands of this application space.
2002-12-04 Implementing GTLP drivers for 32Mbps TDM backplanes
This article describes a simple circuit that may be used to connect the 32Mbps streams from Zarlink's high-density switches.
2002-12-04 Implementing GTLP drivers for 32Mbps TDM backplanes
This application note describes a simple circuit that may be used to connect the 32Mbps streams from Zarlink's high-density switches such as the MT90869 (16K x 16K) and the MT90870 (12K x 12K) to a backplane bus through a LVTTL-GTLP level converter.
2002-10-24 IC products with GaAs integral drivers (on-chip)
This application note describes Alpha's IC products that have on-chip translators.
2002-05-06 HVCMOS drivers for non-impact printing
This application note discusses the use of monolithic high voltage ICs for non-impact printing and plotting applications as well as a brief description of the principle of operation for inkjet and electrostatic printing/plotting.
2009-09-02 How to develop I/O drivers for MQX
This application note aims to guide developers through the process of creating and testing I/O drivers under MQX.
2010-07-07 How to apply additional PWM intensity control to LED drivers
This application note discusses how additional PWM intensity control can be applied to constant-current LED drivers by using a switched-LED power supply.
2002-01-16 High-speed serial interface aims at TFT LCD drivers
This article illustrates to readers how high-speed serial interface can enhance the performance of TFT LCD column drivers in portable multimedia devices.
2007-12-03 High-speed gate drivers come in compact form
Fairchild has introduced the FAN31xx and FAN32xx high-speed low-side gate drivers that offer maximum flexibility for power supply designs.
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