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LM2755 charge pump LED controller with I?C compatible interface in ?SMD

Posted: 06 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:LED controller? I2C interface? application note?

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 I?C 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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