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LM2755 LED controller with I2C compatible interface in µSMD

Posted: 15 Dec 2008     Print Version  Bookmark and Share

Keywords:LM2755  charge-pump-based  LED 

The LM2755 is a charge-pump-based, constant current LED driver capable of driving 3 LEDs with a total output current up to 90mA. The diode current waveforms of each LED can be trapezoidal with timing and level parameters (rise time, fall time, high level, low level, delay, high time, low time) programmed via an I²C compatible interface. The 32 brightness levels found on the LM2755 are exponentially spaced (as opposed to linearly spaced) to better match the response of the human eye to changing brightness levels.

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