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ADM8843 - Four White LED Backlight Driver

Description

The ADM8843 uses charge pump technology to provide the power to drive up to four LEDs.

The LEDs are used for backlighting a color LCD display that has regulated constant current for uniform brightness intensity.

The main display can use up to three LEDs, and the sub display uses one LED.

Features

  • Drives 4 LEDs from a 2.6 V to 5.5 V (Li-Ion) input supply 1×/1.5×/2× fractional charge pump to maximize power efficiency 0.3% typical LED current matching Up to 88% power efficiency over Li-Ion range Powers main and sub display LEDs with individual shutdown Package footprint only 9 mm2 (3 mm × 3 mm) Package height only 0.55 mm Low power shutdown mode Shutdown function Soft start limiting in-rush current.

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Full PDF Text Transcription

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Four White LED Backlight Driver ADM8843 FEATURES Drives 4 LEDs from a 2.6 V to 5.5 V (Li-Ion) input supply 1×/1.5×/2× fractional charge pump to maximize power efficiency 0.3% typical LED current matching Up to 88% power efficiency over Li-Ion range Powers main and sub display LEDs with individual shutdown Package footprint only 9 mm2 (3 mm × 3 mm) Package height only 0.55 mm Low power shutdown mode Shutdown function Soft start limiting in-rush current APPLICATIONS Cellular phones with main and sub displays White LED backlighting Camera flash/strobes and movie light applications Micro TFT color displays DSC PDAs GENERAL DESCRIPTION The ADM8843 uses charge pump technology to provide the power to drive up to four LEDs.
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