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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 search4355 articles
2003-09-19 Zheda driver IC suits car speakers
Zheda Technology & Trading Co. Ltd has released the PV01 tweeter driver IC designed for use in car speakers.
2004-06-02 Zetex pre-driver IC provides variable speed control
Zetex unveiled a pre-driver IC that provides flexible variable speed control of single-phase brushless dc fans and blowers.
2004-02-10 Zarlink laser driver writes 4.7GB in <6 mins
Zarlink Semiconductor has disclosed that its ZL40510 and ZL40511 devices are the first commercially available laser diode drivers that support x16 DVD and x52 CD write/rewrite speeds.
2008-04-21 Xenon flash application design based on NCP5080 integrated with IGBT driver and photo sense function
This paper presents how to design Xenon flash application based on NCP5080 which is a high voltage boost driver integrated with IGBT driver, photo sense function, thermal shutdown, transformer primary side current limit and flash control input.
2000-09-27 XDSL driver and receiver
The demand for high-speed Internet access, LAN connectivity and short distance data communications is growing exponentially. Telephone lines such as twisted pairs have been used in LANs to transmit data between data terminals and computers and video on demand (VOD) applications. This paper introduces the several forms of DSL available.
2002-11-08 Writing a Device Driver for TINIOS
This application note discusses how to write a Device Driver for TINIOS I/O subsystem.
2003-09-19 Writing a Device Driver for TINIOS
This application note examines the TINIOS I/O subsystem, explains how to write a driver as a native library and provides a simple example in the form of a pipe driver.
2003-08-18 Wolfson stereo DAC with headphone driver
Wolfson Microelectronics plc has released the WM8759, a low-power 24-bit stereo DAC with an integrated headphone driver that is suitable for use in next-gen portable home music players.
2003-09-25 Wolfson software driver supports audio codec devices
Designers of mobile communication devices incorporating Wolfson Microelectronics' audio components now have access to a selection of software drivers to support five new processor families.
2007-04-03 WLED driver uses true single-wire digital interface
Micrel has launched the MIC3289, a 1.2MHz PWM WLED driver featuring internal Schottky diode and true single-wire digital interface for brightness control and enable function.
2008-04-24 WLED driver packs negative charge pump, two LDOs
Maxim Integrated Products has introduced the MAX8822, said to be the industry's only WLED driver to combine a highly efficient negative charge pump with two independent LDO regulators.
2010-04-14 WLED driver offers flicker-free dimming feature
Micrel Inc. has released the MIC3263 six-channel WLED driver equipped with a highly versatile dimming control scheme for LED brightness in small LCD panels.
2008-03-12 WLED driver integrates audio amp, LDOs
Maxim Integrated Products has introduced the MAX8821, said to be the only WLED driver to combine a highly efficient, negative charge pump with a fully differential, bridged audio amplifier and two low-noise, LDO current regulators.
2007-12-13 WLED driver has two LDOs for portable systems
Advanced Analogic Technologies has released a highly integrated four-channel white LED driver for portable systems operating off a single-cell Li-ion/polymer battery.
2007-03-27 WLED driver features integrated Schottky diode
Linear Tech's LT3591 white LED driver features an integrated Schottky diode on chip, eliminating both the added cost and space required by an external diode.
2010-03-31 WLED driver ensures precise brightness control
Maxim Integrated Products is rolling out a high-efficiency WLED driver with an integrated boost converter and five GPIO ports.
2008-02-01 WLED driver enables large LCDs in portable apps
By driving up to 10 WLEDs in a serial string, AnalogicTech's new boost converter simplifies the use of larger LCD panels in battery-powered portable devices.
2004-07-19 Winbond to commence driver IC volume production
Winbond Electronics Corp. plans to kick off volume production of driver ICs for LCD TV receivers of over 20-inches in the last quarter of the year.
2005-06-30 White-LED driver touts innovative brightness control
Micrel points to its MIC2297, a PWM boost regulator that's optimized for driving 10 white LEDs in series, for its innovative brightness control circuitry, which in addition to conserving power also helps to cut noise and EMI.
2010-07-22 White LED flash driver improves camera phone picture quality
ADI introduces the ADP1650, a 500-mA LED flash driver sharpens picture quality in camera-enabled cell phones.
2009-09-22 White LED driver targets LCD backlights
TAEC's new 60V power MOSFET driver is designed for white LEDs to be used in LCD panel backlight applications.
2005-12-30 White LED driver tailored for portable CE apps
ON Semiconductor unveiled a white LED driver designed to drive high brightness LEDs in torch or flash applications for camera phones and other portable consumer electronic devices.
2008-10-27 White LED driver suits up for automotive displays
Rohm Electronics white LED driver IC (BD8113EFV-E2) provides constant current for white LED backlights in medium- to large-format TFT-LCD automotive displays.
2008-06-23 White LED driver shines in notebook LCD displays
TI introduces a six-channel, 40V white LED driver with a built-in, high-efficiency boost regulator and 1.5-A FET.
2004-12-06 White LED driver provides 92 percent efficiency
Linear Tech released a fractional charge pump, high current white LED driver that delivers up to 1A of LED current.
2009-08-27 White LED driver promises up to 55% power saving
National Semiconductor claims the smallest white LED driver with dynamic display backlight control that drives up to 11 high-current LEDs in series, illuminating larger displays in portable apps.
2006-03-08 White LED driver integrates Schottky diode
Linear Technology announced the LT3491, a constant current white LED driver, which features an integrated Schottky diode on-chip.
2007-06-19 White LED driver integrates Class AB audio amplifier
Maxim Integrated Products introduces the MAX8678, the industry's only white LED (WLED) driver to combine a highly efficient negative charge pump with a fully differential, bridged audio amplifier.
2005-08-10 White LED driver includes programmable oscillator frequency
National Semiconductor has launched an inductive-boost series white LED driver that features programmable oscillator frequency.
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.
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