World’s Smallest Advanced Lighting Management Unit for Handheld Devices

Aug 01, 2005
World’s smallest backlight light emitting diode

National Semiconductor Corporation introduced the world’s smallest backlight light emitting diode (LED) driver that controls lighting applications in handheld devices, including cellular phones, digital still cameras, gaming devices and MP3 players.

Housed in a tiny micro SMD package, the LP3954 advanced lighting management unit integrates two backlight drivers, a dual red-green-blue (RGB) LED controller, a Flash LED driver and an analog-to-digital converter (ADC) on a single chip. The integrated, magnetic boost DC-DC converter efficiently drives high current loads over a wide battery voltage range.

"National’s LP3954 is a highly integrated backlight LED driver that is easy-to-use, feature-rich and small enough to implement into any phone today,” said Gianluca Colli, director of integrated system products for National Semiconductor’s Portable Power Products Group. “Built-in, stand-alone features, including backlight fading, RGB control and audio synchronization, allow differentiation and reduce software development time, helping manufacturers get their cellular phones to market faster.”

Key Technical Specifications of National’s LP3954 Advanced Lighting Management Unit
The LP3954 is a lighting management unit that drives two separately controlled white LED backlights for the main and sub-display. In the case of a single large display, these units can be combined together to drive up to six LEDs.
The integrated backlight drivers are highly efficient, low-voltage structures with excellent matching that feature an automatic fade-in/fade-out function.

The enhanced, stand-alone, command-based RGB controller allows more flexible control of color or RGB LEDs and is easy to configure. The high-current camera Flash LED driver has a programmable safety timer and features both a torch and a flash mode. The Flash LED timing is triggered by an external signal, a key feature for cell phone cameras. An internal ADC enables either high resolution ambient light/temperature sensing or a built-in, multi-mode audio synchronization feature that drives color LEDs based on an audio input from an MP3, for example. The flexible SPI/I2C compatible interface allows easy control of the LP3954.

The LP3954 is housed in a tiny, 36-bump micro SMD lead-free package that measures 3 mm by 3 mm by 0.6 mm. For more information on the LP3954 or to order samples, visit www.national.com/pf/LP/LP3954.html .

Explore further: Ex-Apple chief plans mobile phone for India

add to favorites email to friend print save as pdf

Related Stories

Better thermal-imaging lens from waste sulfur

7 hours ago

Sulfur left over from refining fossil fuels can be transformed into cheap, lightweight, plastic lenses for infrared devices, including night-vision goggles, a University of Arizona-led international team ...

Hackathon team's GoogolPlex gives Siri extra powers

7 hours ago

(Phys.org) —Four freshmen at the University of Pennsylvania have taken Apple's personal assistant Siri to behave as a graduate-level executive assistant which, when asked, is capable of adjusting the temperature ...

Recommended for you

Ex-Apple chief plans mobile phone for India

8 hours ago

Former Apple chief executive John Sculley, whose marketing skills helped bring the personal computer to desktops worldwide, says he plans to launch a mobile phone in India to exploit its still largely untapped ...

Health care site flagged in Heartbleed review

21 hours ago

People with accounts on the enrollment website for President Barack Obama's signature health care law are being told to change their passwords following an administration-wide review of the government's vulnerability to the ...

Airbnb rental site raises $450 mn

21 hours ago

Online lodging listings website Airbnb inked a $450 million funding deal with investors led by TPG, a source close to the matter said Friday.

Four questions about missing Malaysian plane answered

21 hours ago

Travelers at Asian airports have asked questions about the March 8 disappearance of Malaysia Airlines Flight 370 while en route from Kuala Lumpur to Beijing. Here are some of them, followed by answers.

Android gains in US, basic phones almost extinct

Apr 18, 2014

The Google Android platform grabbed the majority of mobile phones in the US market in early 2014, as consumers all but abandoned non-smartphone handsets, a survey showed Friday.

User comments : 0

More news stories

Ex-Apple chief plans mobile phone for India

Former Apple chief executive John Sculley, whose marketing skills helped bring the personal computer to desktops worldwide, says he plans to launch a mobile phone in India to exploit its still largely untapped ...

Airbnb rental site raises $450 mn

Online lodging listings website Airbnb inked a $450 million funding deal with investors led by TPG, a source close to the matter said Friday.

Health care site flagged in Heartbleed review

People with accounts on the enrollment website for President Barack Obama's signature health care law are being told to change their passwords following an administration-wide review of the government's vulnerability to the ...

A homemade solar lamp for developing countries

(Phys.org) —The solar lamp developed by the start-up LEDsafari is a more effective, safer, and less expensive form of illumination than the traditional oil lamp currently used by more than one billion people ...

NASA's space station Robonaut finally getting legs

Robonaut, the first out-of-this-world humanoid, is finally getting its space legs. For three years, Robonaut has had to manage from the waist up. This new pair of legs means the experimental robot—now stuck ...

Filipino tests negative for Middle East virus

A Filipino nurse who tested positive for the Middle East virus has been found free of infection in a subsequent examination after he returned home, Philippine health officials said Saturday.

Egypt archaeologists find ancient writer's tomb

Egypt's minister of antiquities says a team of Spanish archaeologists has discovered two tombs in the southern part of the country, one of them belonging to a writer and containing a trove of artifacts including reed pens ...