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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
2007-02-19 Using the MAX6951/MAX6950 LED drivers to communicate with MAXQ2000
This application note describes assembly language techniques for the MAX6951/MAX6950 LED drivers using the MAXQ2000's SPI peripheral. It also gives a sample code in the MAXQ assembly language that demonstrates how to use the MAXQ2000 SPI module to experiment with MAX6951/MAX6950 functions
2007-04-23 Using the MAX6951/MAX6950 LED display drivers with SPI interface to communicate with the MAXQ2000 MCU
This application note gives a sample code in the MAXQ assembly language that demonstrates how to use the MAXQ2000 SPI module to experiment with MAX6951/MAX6950 functions.
2004-12-02 Using the ATAR510 microcontroller as an LCD/LED driver
This app note describes the attachment of an LCD and LED to the ATAR510 microcontroller
2007-02-16 Ultrasmall camera flash LED driver loads 700mA
austriamicrosystems has launched an ultrasmall, fully integrated 700mA charge-pump-based flash LED driver.
2005-06-23 UD4001 LED driver demonstration boards
This app note demonstrates the NUD4001 demo boards for applications where the voltage difference between the input voltage and the LED's voltage is small (i.e. when a 12V supply voltage is used to power up a LED array composed of three Luxeon 1 devices
2011-02-04 UBA3077 3-channel LED driver
The UBA3077 is a 3-channel LED driver designed for use in backlighting LCD.
2010-02-04 Two-string HB LED driver packs complete fault protection
Maxim Integrated's MAX16838 two-string HB LED drivers is able to optimize conversion efficiency and provide complete fault protection and allow a 5000:1 dimming range
2009-12-18 TSMC unveils BCD process for LED drivers
The new technologies feature a voltage spectrum running from 12V to 60V to support multiple LED applications
2010-04-13 Touch sensor ICs come with integrated LED drivers
Semtech Corp. has launched the SX864x platform of capacitive sensing ICs that come in eight- and 12-channel models and feature integrated LED drivers
2004-10-01 Toko LED driver IC provides LCD backlighting
The recently-released white LED driver IC from Toko features LCD backlighting for digital still cameras and mobile phones.
2007-05-28 Tiny LED drivers tackle high-power tasks
Operating under a 6-60V input supply and achieving up to 95 percent efficiency, the ZXLD1362 from Zetex Semiconductors can drive up to 16 high power LEDs with an adjustable output current of up to 1A.
2007-10-16 Tiny LED driver powers 10 50mA LEDs
Linear Technology has announced the LT3590, a 48V, buck mode DC/DC converter designed to operate as a constant-current LED driver.
2006-12-14 Tiny flash LED driver suits advanced handsets
California Micro Devices has unveiled a new family of PhotonIC white LED drivers capable of supporting a wide range of high-current flash LEDs in advanced handsets
2012-03-29 TI's LED driver boasts primary side sensing, PFC
The TPS92310 AC/DC constant current driver for non-dimmable LED lighting that aims to reduce cost and shrinks-to-fit high-power LED retrofit bulbs including A19, PAR30/38 and GU10.
2007-06-25 TI unrolls high-power WLED driver IC
TI has rolled out a device based on an HF synchronous-boost topology with constant-current sink to drive single white LEDs.
2008-05-12 TFT LCD modules feature replaceable LED backlights
TAEC has rolled out a new color active-matrix TFT-LCD module product lineup for industrial applications that incorporates long-life, replaceable LED backlighting systems
2011-01-19 Temp sensor IC enables efficient LED lighting
Seiko Instruments Inc. (SII) launches the S-5855A Series of pulse width modulation (PWM) output temperature sensor IC for LED lighting designs
2014-06-11 Techniques for enabling dimmable LED bulbs
Many LED lamps are advertised as dimmable, however in reality the performance of many of them is unimpressive with varying results depending on the dimmer used and loading of the circuit
2004-05-18 Supertex rolls out HB driver IC
Supertex has disclosed that its HV9910 is the industry's first universal, high brightness LED driver IC.
2005-08-25 Supertex LED driver with PFC simplifies street lighting
Supertex' HV9931, an off-line driver for single high-brightness LEDs, includes a power factor correction stage that suits the chip to traffic signal, street lamp and decorative lighting applications
2005-12-05 Supertex LED driver IC with wide input voltage range
Supertex unveiled a new LED driver IC designed to provide high LED current accuracy and a very wide input voltage range of 9V to 250V. Target applications include RGB backlighting, automotive lighting, and battery powered LED lamps.
2005-08-05 Supertex LED driver IC delivers 30mA regulated output current
The new 3-pin switch-mode LED driver IC with a regulated output current of 30mA from Supertex can be operated from either a rectified universal AC line range of 85Vac to 264Vac or 20Vdc to 400Vdc.
2013-04-29 Supertex intros high brightness LED driver
The HV9910C is an open loop, current mode, universal LED driver IC geared for general and decorative LED lighting, flat panel display backlighting and other DC/DC or AC/DC input based applications.
2002-06-28 STMicro LED driver suits automotive light clusters
The STLC1 LED cluster driver from STMicroelectronics integrates input buffers, individual low-side drivers, and a remote indicator for lamp failure.
2011-03-24 Step-down LED driver offers 10,000:1 true color PWM dimming
Linear Technology's LT3597 60V, 1MHz, step-down DC/DC converter operates as a three channel, constant current LED driver for backlighting LED billboards as well as industrial, automotive and medical displays.
2005-03-25 ST expands LED driver IC portfolio
ST introduced a set of single-chip LED driver ICs that integrates the functions needed to drive LEDs at a constant current, set by an external resistor.
2013-08-14 SSL LED driver integrates boost, flyback converters
The iW3623 from Dialog Semiconductor offers a universal 100-277VAC input range and output power up to 45W.
2013-06-10 SSL extends lifespan of LED bulb
Solid-state lighting can lengthen an LED bulb's lifetime by managing internal thermal conditions in closed lighting fixture
2011-04-28 SSL driver IC offers 90% efficiency
Power Integrations unveils a new reference design based on its single-stage LED-driver IC which the company claims achieves more than 90 percent energy efficiency and exceeds 0.9 power factor.
2005-08-03 Smallest backlight LED driver?
National Semiconductor released what it touts as the world's smallest backlight LED driver that controls lighting applications in handheld devices, including cellphones, digital still cameras, gaming devices and MP3 players.
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