Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
EE Times-Asia > Advanced Search > drivers

drivers What is an LED driver? Search results

?
?
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 search3151 articles
2003-12-16 Zetex LED drivers add true analog dimming
Zetex has launched what it claims is the first white LED driver with the option of an integrated true analog dimming mode, offering a noise-free alternative to pulsed dimming control.
2001-05-23 Writing flexible device drivers for DSP/BIOS II
This application note defines a flexible application programming interface (API) for streaming I/O device drivers for use in real-time DSP applications written with the DSP/BIOS II real-time kernel.
2006-02-16 Writing drivers for touchscreen interface hardware
Here's a step-by-step design guide that leads you through the hardware and software required to make touchscreens work the first time.
2007-04-12 WLED drivers for cameras feature built-in LDOs
Maxim Integrated Products has introduced the MAX8645X/MAX8645Y, said to be the smallest WLED drivers with two built-in LDOs for camera supply.
2008-05-19 WLED drivers backlight entry-level phone displays
AnalogicTech's AAT3103 constant frequency, charge-pump-based, current source WLED drivers are designed to backlight lower-cost LCD displays in entry-level cellphones.
2005-11-16 Whizzy cars, dizzy drivers
New automotive technologies are already losing out to the foolishness of people behind the wheel.
2007-04-24 White LED drivers suit dual-display phones
Suited for dual-display architectures including clamshell phones, the SP6415 white LED driver from Sipex can be configured to automatically turn off the sub-display when the phone is open.
2007-06-20 White LED drivers offer 90% efficiency
Vishay Intertechnology Inc. releases two new 1.25MHz current-mode boost converters optimized for white LED applications.
2006-03-31 White LED drivers feature dual-gain architecture
National Semiconductor introduced three new inductorless white LED drivers for display backlighting in cellphones, PDAs, portable gaming devices and MP3 media players.
2006-08-16 White LED drivers enable independent brightness control
National's new highly integrated, charge-pump-based, constant-current white LED drivers are suited for single- or multidisplay backlighting in portable consumer products and handsets.
2008-03-27 Vista SP1 trips on popular Intel chipset drivers
PCs from HP, Gateway, Lenovo and other major computer makers that contain a widely used Intel chipset can't be upgraded to Windows Vista SP1 if they're running certain drivers.
2008-10-01 Video drivers tout single supply operation of amplifiers
Intersil introduces 200MHz single supply video drivers, the ISL59833 and ISL59837, each equipped with charge pumps that create negative voltage and remove the need for external negative rails.
2006-04-25 Video cable drivers eye professional video equipment designers
Cypress introduced two HD/SD multi-format video cable drivers for video distribution amplifiers, production routers and switchers, and other professional broadcast equipment.
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.
2000-05-31 Using PIC16C5X Microcontrollers as LCD Drivers
This application note describes an LCD controller implementation using a PIC16C55 microcontroller. This technique offers display capabilities for applications that require a small display at a low cost together with the capabilities of the standard PIC16C55 microcontroller.
2006-11-16 Use high-voltage drivers for large flat-panel displays
Designers are finding the optimum trade-off between strengths and limitations of available manufacturing technologies including HV-CMOS, BCD and silicon-on-insulator SOI to make high-voltage drivers in large flat displays.
2001-09-28 Uninstalling FTDI VCP drivers under Windows 2000
This application note explains some of the concerns that need to be addressed with uninstalling Future Technology Devices' VCP (Virtual COM Port) drivers under Windows 2000 due to security permissions restrictions inherent in this OS.
2009-03-16 Understanding drivers and direct I/O
This application note answers common questions about the use of drivers and direct I/O to send commands from a PC application to the test instrument.
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.
2008-05-09 Transient voltage suppressor guards DSL line drivers
Semtech has announced the TClamp1201S, a 12V, low-capacitance protection device for xDSL applications that features low clamping voltage and a flow-through package design to protect new xDSL line drivers.
2007-10-01 Trailblazing dual differential ADC drivers debut
The industry's first dual differential ADC driversthe ADA4937-2 and ADA4938-2have been launched by ADI. The drivers reduce design complexity, cost and board space in industrial and communications 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.
2013-10-01 Toshiba introduces unipolar stepping motor drivers
The TB67S14x series touts a monolithic structure and small package by using an 80V analogue process, and also reduces power consumption, compared with a hybrid structure and bipolar transistor.
2007-07-30 Tiny white LED drivers suit entry-level handsets
AnalogicTech has released the AAT3193, the first in a family of two- and three-channel, charge pump-based white LED drivers for entry-level handsets.
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.
2012-04-24 TI's motor drivers target battery-powered apps
The DRV8834, DRV8835 and DRV8836 motor drivers claim to cut power use by 80 percent and PCB space by 95 percent.
2012-08-31 TI touts 1.8V, 5V channel relay drivers
The ULN2003LV relay driver replaces discrete components with a single device to drive lower voltages for data relays and rails within telecommunications equipment.
2012-10-15 TI rolls MCUs, PMICs, motor drivers
The SafeTI design package includes the 32bit Hercules safety MCUs, TPS65381-Q1 PMIC and DRV3201 motor driver to help speed and ease customer motor control design and certification.
2004-10-07 TI line drivers provide high performance
TI introduced what it claims as the industry's first multipoint-LVDS line drivers for clock distribution.
Bloggers Say

Bloggers Say

See what engineers like you are posting on our pages.

?
?
Back to Top