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: Google searches hold key to future market crashes

add to favorites email to friend print save as pdf

Related Stories

Physicists discuss quantum pigeonhole principle

11 hours ago

The pigeonhole principle: "If you put three pigeons in two pigeonholes at least two of the pigeons end up in the same hole." So where's the argument? Physicists say there is an important argument. While the ...

Giant crater in Russia's far north sparks mystery

13 hours ago

A vast crater discovered in a remote region of Siberia known to locals as "the end of the world" is causing a sensation in Russia, with a group of scientists being sent to investigate.

NASA Mars spacecraft prepare for close comet flyby

14 hours ago

NASA is taking steps to protect its Mars orbiters, while preserving opportunities to gather valuable scientific data, as Comet C/2013 A1 Siding Spring heads toward a close flyby of Mars on Oct. 19.

Recommended for you

Google searches hold key to future market crashes

1 hour ago

A team of researchers from Warwick Business School and Boston University have developed a method to automatically identify topics that people search for on Google before subsequent stock market falls.

Lenovo's smart glasses prototype has battery at neck

3 hours ago

China's PC giant Lenovo last week offered a peek at its Google Glass-competing smart glass prototype, further details of which are to be announced in October. Lenovo's glasses prototype is not an extreme ...

Amazon launches 3D printing store

6 hours ago

Amazon announced Monday the launch of an online store for 3D printed items to allow consumers to customize and personalize items like earrings, pendants, dolls and other objects.

User comments : 0