Half of the company launched two new highly integrated lighting management

National Semiconductor Corporation Ns launched two new highly integrated lighting management unit, including a high voltage step-up converter and programmable constant current drive, the backlight in the display and keyboard, and RGB camera flash LED can control up to 20 series connected LED. LP3958 and LP5526 lighting management unit uses a miniature SMD package and is ideal for mobile phones and other portable devices.

The new lighting management unit half the country companies can drive 2 to 5 sets of 4 series connected LED, depending on the application of Yu Zhaoming. The products were optimized and the PDA mobile phone screen in single or double screen mobile phone. Each has three general input / output trigger lighting functions such as flash or control additional device signals. LP3958 has 70 mA output current and LP5526 with a current output of 150 mA is used to drive the display backlight and flash machine LED. Two products have a I2C interface. Single screen and dual display, LP3958 lighting management unit can drive 8 white LED groups each of 4 series connected LED, is a typical display group. The backlight is displayed via a two line, low voltage, compatible I2C interface, the GPIO feature allows the user to control external devices. Serial interface can be achieved by reducing the number of lines, as far as the keyboard backlight, the three serial connection LED group can be achieved for each of the 4 LED can be independently controlled for light segmentation. This is especially useful in games and navigation applications, using a single key as a lighting key. LP5526 and LP3958 has the same function and multi chip package and can drive a series camera flash LED (up to 3W) in the event of a software problem, the LP5526 has an internal safety timer to protect flash LED aging. The flash LED output can be used as a single or series connected primary LED. According to national semiconductor power management products according to the semiconductor market iSuppli in 2005 for the share survey, national semiconductor is the world's largest regulator chip suppliers, the market share of up to 14%. National Semiconductor with innovative power management products every kind of, including linear regulator, power monitoring, control and voltage reference IC leading the industry, as well as a variety of switching converter, such as high voltage DC / DC converter integrated circuit, switched capacitor converter, light management integrated circuit and inductive switching converters. The American national semiconductor is particularly designed to provide a wide range of online design engineers with a variety of online design tools, allowing engineers to design their system to select the best power management chip. System design engineers can also log in national semiconductor WEBENCH design? "To buy the product, and then in the online design and analysis system design, then using tailor-made packages for modeling, suite more will ensure to customers in the shortest time. Price and availability LP3958 and LP5526 two chips have been a large number of cash supply, procurement of the same to 1000 units, LP3958 and LP5526 single price of $$1.60 and $$2.00 don't. Provide 2.5mmX2.5 mm, 25-bump micro SMD package. National Semiconductor Corporation Ns national semiconductor is a leading provider of simulation technology providers, analog chips and subsystems has been committed to the development of high value-added. The company's advanced products include power management circuits, display drivers, audio and operational amplifiers, communications interface products and data conversion solutions. National Semiconductor's analog chip products are mainly for mobile phones, display and wide electronic products market, including the market of medical equipment, automotive electronic system, industrial system and test and measurement equipment and other products. National Semiconductor Corporation, based in the United States, San (Santa Clara), as of 2005, the fiscal year of turnover of $1 billion 910 million.