Simple-to-use boomer audio synchronized LED driver

National Semiconductor has launched a “no-programming required” Boomer audio synchronized light emitting diode (LED) driver. While previous designs required preprogrammed I2C compatible code to control lighting patterns, the LM4970 gives designers the option of using I2C compatible pattern control or choosing automatic audio-synchronized pattern generation. If the automatic mode is used, no software or memory storage is needed for pattern control, freeing up memory storage space for other features. The I2C compatible control bus is also used to turn each driver on or off, provide flexibility for controlling the brightness of the LED, as well as the ability to change high and mid-range frequency bands. Internal control features reduce the number of external components, optimizing board space in small form factor applications such as cellphones, MP3 players, PDAs and other portable devices. The LM4970 costs $0.90 in 1,000-unit quantities.

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