Backlight LED Driver Integrates Flash LED and Backlight Drivers, RGB Controller and ADC on a Single Chip
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 http://www.national.com/pf/LP/LP3954.html.
About National's Power Management Products
National Semiconductor is the number one supplier of power management ICs with 14.1 percent market share, according to iSuppli's 2005 voltage regulator/reference survey. National's power management revenue grew 37.3 percent in 2004 over the previous year, compared to 24 percent growth for the industry. National's innovative power management products include best- in-class linear regulators; power monitoring, control and reference ICs; and switching converters, such as high-voltage ICs for DC-DC conversion, switched capacitor converters, lighting management ICs and inductive switching converters. National also offers online tools that enable power designers to select the best power management chips for their applications. National's Webench(R) design tool allows designers to choose a product, create and analyze a design, and then build custom prototypes that can be delivered within 24 hours. More information about National's power management products is available at http://power.national.com .
Pricing and Availability
Available now, the LP3954 advanced lighting management unit is priced at $2.10 in 1,000-unit quantities.
About National Semiconductor
National Semiconductor, the industry's premier analog company, creates high-value analog devices and subsystems. National's leading-edge products include power management circuits, display drivers, audio and operational amplifiers, communication interface products and data conversion solutions. National's key analog markets include wireless handsets, displays and a variety of broad electronics markets, including medical, automotive, industrial, and test and measurement applications. Headquartered in Santa Clara, California, National reported sales of $1.91 billion for fiscal 2005, which ended May 29, 2005. Additional company and product information is available at www.national.com.
NOTE: National Semiconductor and WEBENCH are registered trademarks of National Semiconductor Corporation. All other brand or product names are trademarks or registered trademarks of their respective holders.
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