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Partname:AAT2806_07
Description: Dual High Efficiency Charge Pump for White LED and Flash Applications
Manufacturer:Advanced Analogic Technologies
Datasheet:PDF (513K).
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The AAT2806 is a dual charge pump designed to support both the white LED backlight and flash applications for systems operating with lithium-ion/polymer batteries. The backlight charge pump is capable of driving up to four LEDs at a total of 80mA. The current sinks may be operated individually or in parallel for driving higher current LEDs. To maximize power efficiency, the charge pump operates in 1X, 1.5X, or 2X mode, where the mode of operation is automatically selected by comparing the forward voltage of each LED with the input voltage. AnalogicTech's S2CwireTM (Simple Serial ControlTM) serial digital input is used to enable, disable, and set current for each LED with an eight-level logarithmic scale plus four low-current settings down to 50A for optimized efficiency, with a typical operating quiescent current of less than 50A.

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