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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
2005-06-21 Offline LED driver
This app note provides a simple approach to designing an LED driver utilizing the ON Semiconductor NCP1014 self-supplied monolithic switcher.
2003-07-09 NPC samples white LED drivers for portable apps
Nippon Precision Circuits has started sample shipments of their white LED driver ICs - SM8120, SM8121AH, and SM8130.
2014-07-21 Novel sensor controls LED colour from mobile interface
MAZeT demonstrated the accurate colour control of LEDs using a smartphone or tablet as a remote control through the use of its True Color sensor.
2008-04-07 Notebook makers tap O2Micro's LED technology
O2Micro International Ltd has announced that several top-tier notebook manufacturers have chosen O2Micro's LED backlight drivers for their high-end models
2008-03-05 No-noise LED drivers suit low-cost portable devices
Leadis Technology's new family of no-noise, 4-channel white LED drivers target a new generation of low-cost handsets and portable products that use lower-VF white LEDs and lower-cost TFT-LCD modules
2003-04-11 NJR white LED driver fits portable devices
The NJU6050 white LED driver from New Japan Radio Co. Ltd packs an output driver and step-up dc/dc converter in a SOT23-5 package.
2005-02-07 NJR LED driver provides 18V-output voltage
The NJU6049 from NJR is a high efficient white LED driver that contains a high efficient step-up dc-dc converter and 20mA-output driver.
2005-06-27 New system LED drivers tailored for compact LCDs in mobile apps
Rohm developed new system LED drivers targeted for the backlight LEDs used in compact LCDs in mobile equipment such as PDAs, DSCs, DVCs and can also be used as supplementary light as a flash in mobile phone cameras
2010-11-05 New step down HBLED driver IC allows ultra wide contrast ratios
Micrel Inc. has just rolled the MIC3202, a new Step-Down HBLED driver with high-side current sense targeting MR-16 lamps and other general illumination applications
2005-09-02 New LED driver from austriamicro
austriamicrosystems extended its LED driver family with the release of the AS3691 4x400mA LED driver, designed for the fast-growing high and ultra high brightness LED application market.
2005-11-03 New GPIO and LED drivers from Maxim
Maxim Integrated Products expanded its serial-bus-controlled GPIO and LED drivers with MAX7319-MAX7329
2005-05-06 National rolls out new 'no-programming-required' LED driver
National unveiled a "no-programming-required" Boomer audio-synchronized LED driver that gives designers the option of using I?C compatible pattern control or choosing automatic audio-synchronized pattern generation.
2004-11-16 National LED IC drivers suit handheld apps
National announced a new family of LED IC drivers designed for portable handheld devices such as cellphones, smart phones, GPS and PDAs
2006-10-23 National intros LED drivers for high-brightness LEDs
National Semiconductor has introduced a new family of LED drivers designed to power the new generation of 1W to 5W, high-brightness LEDs found in automotive, industrial and general illumination applications
2007-09-25 Multistring white LED driver has 91% efficiency
Semtech has released two integrated, multistring white LED drivers that feature 91 percent efficiency at maximum load for improved thermal conditions and longer battery life in portable apps
2000-05-30 Multiplexing LED Drive and a 4x4 Keypad Sampling
This application note describes a method that uses only 16 I/O pins of a PIC16C5X microcontroller to sample a 4-by-4 keypad, and directly drive four seven-segment LEDs.
2007-02-26 Multimode white LED driver delivers 400mA
Linear Technology has announced the LTC3218, an inductorless high-current white LED driver that delivers up to 400mA of LED current.
2013-07-26 Multi-topology DC/DC LED driver for automotive lighting
The TPS92690 is an N-channel MOSFET controller with low-side current sense provides design flexibility and low electro-magnetic interference.
2006-04-03 Multi-LED driver touts tight programmability
Catalyst Semiconductor's LED driver, the CAT3626, is a 1x/1.5x charge pump with precision current-setting capabilities.
2010-03-30 MPR121 GPIO and LED driver function
The GPIO and LED driver function can be used when not all the 12 input sensing channels are occupied for touch sensing detection, which is made possible by internal multiplexed pin structure.
2013-07-09 Modular LED drivers minimises time-to-market
What are the dangers with bespoke devices and why are off-the-shelf LED drivers generally the better solution
2005-10-24 Mitsumi unveils charge-pump-type white LED drivers
Mitsumi Electric has developed a charge-pump-type IC that promises higher efficiency than its competitors.
2005-10-21 Mitsumi LED driver IC enables even luminance for white LEDs
Mitsumi's new MM3197XR white LED driver IC enables even luminance by circulating a certain level of current (using inductor) and bringing the power pressure accuracy to 5 percent.
2002-03-07 Micrel LED display driver has 30mA current sink
The MIC5400 LED video display driver consists of two banks of eight LED driver outputs, each with a 30mA current sink.
2004-08-24 Micrel high-power LED driver has small footprint
Micrel introduced a 1.2MHz PWM dc-dc white LED driver designed to provide high power within an extremely small footprint.
2007-03-01 Maximize battery life with smaller LED drivers
The advantages of charge pumps over inductive boost solutions for driving miniature LEDs are their compact size, ease of implementation and low noise.
2004-03-23 Maxim offers converters with LED drivers
The MAX1497/MAX1499 ADCs from Maxim Integrated Products comes integrated with light emitting diode drivers.
2004-03-16 Maxim LED drivers provide 17 7V-tolerant output ports
The MAX6964 LED driver from Maxim Integrated Products provides microprocessors and microcontrollers with seventeen 7V-tolerant output ports.
2002-08-08 Maxim LED drivers come with GPIOs
The MAX6956 and MAX6957 static LED display drivers from Maxim Integrated Products come with GPIOs to expand the I/O capabilities of microcontrollers and microprocessors
2003-05-09 Maxim LED driver controls four white LEDs
The MAX1573 white LED driver is capable of driving up to four white LEDs with a regulated, constant current.
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