National Semiconductor Corp. today will unveil seven programmable power and lighting management ICs to enable battery efficiency in wireless "feature" phones.
Designed as complete subsystems, the semiconductors integrate building blocks for voice and multimedia modems in portable devices, and provide a full spectrum of add-on display and lighting functions for color displays and handsets, the company said.
"Most of these devices were developed along with our lead customers to introduce features that allow mobile phones to be more attractive to end users," said John Guyatt, marketing manager for mixed-signal, analog, and power ASICs at National Semiconductor in Berkshire, England.
"We have used the strength of our standard product circuit design and brought it into play with more integrated devices and packaging solutions," Guyatt said.
Initially all the products will be offered in compact leadless lead-frame and laminate chip-scale packages (CSPs). In the third quarter of 2003, National, which is headquartered in Santa Clara, Calif., plans to offer them in Microfil packaging, a new technology that will reduce the footprint from 49mm2 to 16mm2, Guyatt said.
The LP3935, 3938, 3941, 3945, and 3946 are programmable analog power management ICs that integrate independent and programmable lithium-ion and nickel/metal hydride battery charging functions, from seven to 11 high-efficiency linear regulators, system start-up and control with serial interfaces, and one or more LED display drivers.
They are priced from 90 cents to $2.25, depending on features, in quantities of 500,000, the company said.
The programmable lighting management systems, LP3933 and LP3936, address features that make cellular handsets fashionable, such as "fun lighting"--the use of blinking lights to represent different ring tones.
Already popular in Japan, fun lighting is expected to catch on with European and U.S. consumers in the next year or so, according to Guyatt.
The LP3933 and LP3936 are aimed at flip-phone handsets that have a camera, RGB indicator LEDs, main display, and a subdisplay. The LP3933 integrates a boost regulator and pulsewidth-modulated lighting control functions to drive up to six white LEDs and two sets of red, green, and blue LEDs. The LP3936 has the same functions with a single RGB indicator LED driver. In 32-pin laminate CSPs, pricing is $1.30 and $1.20, respectively.