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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
2012-06-08 LED driver design offers 93%efficiency at 30% less BOM
Power Integrations' scalable design meets EN61000-3-2C, claims a system power factor greater than 0.97, THD less than 10 percent.
2005-03-25 LED driver delivers up to 700mA
Linear Tech rolled out a fractional charge pump, high current white LED driver that delivers up to 700mA of LED current.
2009-12-15 LED driver delivers up to 4.3A flash pulse
Exar Corp. claims the highest intensity LED flash driver with full management of supercapacitor-based flash technology.
2009-10-23 LED driver delivers over 20A continuous current
The LT3743 provides up to 20A of continuous LED current from a nominal 12V input, delivering in excess of 80W
2009-07-07 LED driver delivers high current accuracy
HV9985 delivers high LED current accuracy through closed loop control of the output current
2007-10-12 LED driver controls 160 LEDs at 92% efficiency
Linear Tech's LT3595 buck mode converter can drive up to 160 50mA LEDs with an efficiency of 92 percent.
2006-05-09 LED driver comes with PWM dimming, 5V regulator
Maxim introduced an adjustable constant current source that provides up to 350mA of current to one or more strings of high-brightness LEDs.
2010-02-22 LED driver comes with PWM dimming capability
Supertex has launched the HV9963 closed-loop LED driver IC with pulse width modulated (PWM) dimming capability designed to optimize LED performance and efficiency and extend LED life.
2010-04-30 LED driver comes with dynamic headroom control
National Semiconductor Corp. has introduced the LM3464 LED driver with dynamic headroom control and multiple outputs for high-power applications.
2010-07-12 LED driver combines PFC, AC/DC conversion
ON Semiconductor introduces an offline LED driver that integrates power-factor correction (PFC) and isolated step-down AC-DC power conversion in a single stage.
2009-11-24 LED driver brings new light to mobile apps
Audio synchronization enables programmable light patterns with LEDs blinking and changing colors to the beat of the music.
2012-09-24 LED driver boasts multiple dimming control
TI's LM3463 is a six-channel LED driver that claims to maximise system efficiency and reduces complexity in LED area lighting applications, such as street, high-bay and ceiling lights.
2009-07-15 LED driver boasts 3% current accuracy
Supertex Inc. has released the HV9961, an average-mode, constant control LED driver IC designed to drive LEDs using a buck topology.
2008-05-23 LED driver boards eye industrial, medical LCDs
Endicott Research Group has released two high-efficiency, low-profile Smart Force LED driver boards as standard products for a wide range of industrial and medical LCDs.
2010-05-31 LED driver boards deliver plug-and-play solution
From Endicott Research Group come two LED driver boards that provide compact, economical products to OEM panel designers looking to get the maximum performance out of their displays.
2007-09-13 LED driver board touts brightness stability over wide input range
Endicott Research Group has released two Smart Force LED driver boards for industrial LCDs that provide full function LED drivers in a compact size, with full brightness and enable control.
2006-08-29 LED driver allows wide dimming range
Maxim said its new LED driver features a high-voltage PWM pin that allows a wide dimming range and a wide operating input voltage range that protects against large transients.
2008-01-17 LED driver allows independent control of 18 LEDs
Linear Tech has announced the LTC3220/-1, an inductorless, low-noise, high-efficiency LED driver that provides 18 individually configurable LED current sources for complete flexibility in programming multiple displays.
2005-05-06 LED driver allows complete programmability of 18 LEDs
Dialog Semi launched a universal LED controller which provides complete programmability of up to 18 LEDs for the control of lightshows, backlights and signal LEDs in portable devices requiring varying light sequences
2012-09-03 LED driver aimed at 100W incandescent bulb replacements
Power Integrations' DER-323, a reference design for an 18W, 88 percent-efficient, non-isolated A19 LED driver based on LNK460VG, is a low-profile IC from the company's LinkSwitch-PL family.
2010-02-24 LED driver achieves >0.95 power factor
ON Semiconductor has launched a new power factor corrected dimmable LED driver for residential and commercial lighting applications.
2005-06-10 LED display maker selects TI's power management technology
Texas Instruments Inc. announced that Daktronics Inc. has chosen TI's power management technology for the company's ProStar VideoPlus display systems
2010-05-18 LED controller kit handles dimming, color adjustment
Texas Instruments Inc. has just announced its new TMS320C2000 Piccolo microcontroller DC/DC LED Developer's Kit to allow designers to differentiate designs with advanced features such as dimming, color tone adjustment, power line communication and fault detection
2008-02-06 LED backlighting solution with LM3430 and LM3432
The LM3432 is a 6-channel high voltage current regulator which provides a simple solution for LED backlighting applications and the LM3430 is a companion device to supply high voltage required to drive serially connected LED strings
2007-03-14 LED backlight to replace CCFL in large-screen LCD TVs
Power Analog Microelectronics suggests that replacing CCFL backlight with LED backlight in LCD TVs will address the issue of power consumption in China
2008-09-04 Leadis to exhibit driver, audio, touch solutions at IIC-Taiwan
Leadis Technology Inc. announced it will showcase its RGBW display driver solution, LED drivers, audio CODECs and touch controllers at IIC-Taiwan 2008 technology exhibition happening Sept. 9-11.
2008-02-22 Leadis ships samples of 6-channel LED driver
A charge-pump based 6-channel LED driver with an industry-standard I?C interface is available for sampling from Leadis Technology Inc.
2008-05-27 Leadis claims first touch controllers with integrated haptics driver
Leadis Technology Inc. offers samples of the LDS6010 and LDS6040, two new products in the company's family of PureTouch low-power controllers designed for capacitive touch applications.
2008-09-18 LDO white-LED driver TPS7510x provides incredibly small solution size
Use of white-LED drivers has increased in recent years due to the popularity of color LCD screens on most portable electronic equipment. The white backlight required to bring out the color in these screens is most often provided by white LEDs
2008-06-06 Isolated driver modules cater to high-intensity LEDs
Rohm Electronics has introduced what it claims the industry's first AC/DC-isolated LED driver modules utilizing constant-current circuits optimized for driving LEDs.
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