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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.
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2010-07-02 LED drivers cut need for external Schottky diode
IXYS Corp. has released the LDS8710/11, LDS8720/24/26 inductor-based, high-efficiency LED driver family that eliminates the external Schottky diode normally used in the rectification loop.
2008-10-09 LED drivers comply with lighting brightness demands
Diodes has extended its Zetex LED driver products with the release of its three compact LED drivers that improve accuracy and thermal capacity.
2010-10-01 LED drivers boast brightness, backlight control
Advanced Analogic Technologies delivers new high efficiency, low-power LED drivers with backlight control and dimming
2011-11-28 LED drivers boast >90% efficiency
Power Integrations' LinkSwitch-PH devices target high-reliability industrial, commercial, and exterior solid-state lighting applications.
2010-06-08 LED drivers allow design flexibility in mobile apps
From Fairchild Semiconductor come LED drivers that deliver 92 percent peak efficiency, extending battery life in mobile handsets, gaming devices, MP3 players and other small display applications
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
2010-05-04 LED driver with PWM eases dimming control
Clare Inc. has launched the CPC9909 high-voltage HB LED driver that can drive hundreds of HB LEDs in-series and/or parallel combinations in a constant peak-current control topology.
2010-12-16 LED driver with PFC, phase dimming decoder
Read about a power factor controller (PFC) with separate phase dimming decoder that regulates an accurate output voltage while maintaining excellent power factor at the input.
2008-03-17 LED driver with inductive boost ready for sampling
An LED driver with inductive boost capabilities, giving system architects additional design options for backlighting applications, has started sampling from Exar Corp.
2007-09-19 LED driver with dual LDOs suits portable apps
Linear has introduced the LTC3230 integrated white LED driver with dual LDO regulators for driving Main and Sub LED displays and supplying low-voltage system rails in portable electronic devices.
2007-03-15 LED driver with current balancing suits LCD apps
Maxim's MAX8790 white LED driver for large LCD panels device uses a built-in string-current-control circuit to achieve 1.5 percent regulation accuracy between strings, which ensures even brightness for all LEDs.
2011-03-18 LED driver uses peak current mode control scheme
Supertex releases HV9860 boost LED driver designed to optimize the performance and lifespan of LEDs in applications RGB or white LED backlighting, LCD TVs and LED lamps.
2012-03-16 LED driver ups LCD TV power efficiency by 9%
It is the first device of its type to provide LED driving capabilities in TVs based on the LCD integrated power supply (LIPS) architecture, Microsemi said
2005-05-16 LED driver turns on all the lights
California Micro Devices' CM4600, the first of the company's new PhotonIC family of highly integrated LED drivers, can drive all the LEDs in a wireless handset
2008-03-05 LED driver trims component count in designs
Exar has released a LED driver in a small 3mm x 3mm QFN package that integrates several off-chip functions, which lowers external component requirements while saving board space.
2011-03-08 LED driver touts current accuracy
Supertex presents the HV9971, a patented, isolated, constant current LED driver for solid-state lighting applications.
2012-10-04 LED driver targets monitors, industrial LCD backlighting
The Atmel MSL3080/86/88 features a boost controller, I2C interface and 60mA/channel internal current sinks that support 12bit dimming range.
2007-03-13 LED driver supports all energy-saving programs
ST's new LED driver has auto-power-saving features that enable it to save power without external intervention, thus supporting all energy-saving programs.
2005-04-22 LED driver suits wireless handsets
California Micro Devices unveiled PhotonIC CM4600, the first member of its new PhotonIC family of highly integrated LED drivers, that is capable of driving all the LEDs in a wireless handset
2006-06-02 LED driver suited for high-volume three-LED apps
Catalyst's new LED driver is suited for high-volume, three-LED backlighting display apps in portable devices.
2011-06-16 LED driver simplifies area lightning design
National Semiconductor has introduced the LM3466, a highly integrated linear LED driver that simplifies the design of high power, wide area lighting fixtures.
2010-01-25 LED driver saves space, cost in illumination apps
Diodes has released a 1A-rated linear-mode constant current LED driver designed to reduce the size and cost of a range of general illumination products.
2013-05-24 LED driver sales see robust growth from 2012 to 2015
"Major advances and cost reductions in lamps, luminaires and automotive lighting are spurring the rapid growth of the market for LEDs in general lighting applications," said Stephanie Pruitt of IHS.
2011-10-05 LED driver runs from 6-30V
Diodes' LED driver features switching frequency up to 1MHz and claims to decrease EMI in low-cost lamps.
2012-02-22 LED driver removes LCD TV flickering, 3D ghosting
The Atmel MSL2164 and MSL2166 devices claims to offer flexible dimming modes with 12bit PWM string dimming that allows 4,096 gray scales for an enhanced image.
2012-02-10 LED driver reference design touts 90% efficiency
Power Integrations' DER-286 describes a 30W LED tube replacement ballast power supply that operates from 90VAC up to industrial 308VAC input voltage
2012-12-06 LED driver reference design for T8 tube
Power Integrations' designs feature low component count and leverage simple magnetics and single-sided boards yielding industry-leading power densities of 14.2W/in3.
2009-09-25 LED driver packs temp management control
National Semiconductor Corp.'s new LED driver drives high-brightness LEDs in indoor, outdoor and automotive apps.
2010-04-13 LED driver operates with up to 150C junction temp
Linear Technology offers the H-grade version of the LT3517 DC/DC converter designed to drive high current LEDs, which operates with a junction temperature up to 150C.
2011-10-06 LED driver offers less PCB space
austriamicrosystems has released its AS1130 drivers, which control 132 LEDs and boasts of colorful effects, animations and extends battery life of up to 80 percent.
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