The ADP5520 is a versatile single-chip, white LED backlightdriver with a user configurable I/O expander. This device fits handset applications where the flip or slider section of the phonerequires backlighting, I/O signaling and detecting, auxiliary LED lighting, and keypad functions. By incorporating an I2C®-compatible serial interface and a single line interrupt, the ADP5520 significantly reduces the total number of linesrequired to interface with the baseband processor across thehinge flex.
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