AAT3104 - Advanced Analogic Technologies

AAT3104 Low Cost 1x/2x 4 Channel Charge Pump WLED Driver

The AAT3104 is a charge-pump based, current-source white LED driver capable of driving one to four LEDs up to 30mA, each. It automatically switches between 1x mode and 2x mode to maintain the highest efficiency and optimal LED current accuracy and matching. The AAT3104 charge pump’s 1x mode (bypass mode) has very low resistance allowing LED current regulatio.

Features

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• Drives up to 4 LEDs at up to 31mA each Automatic Switching Between 1x and 2x Modes 1MHz Switching Frequency Linear LED Output Current Control Single-wire, S2Cwire Interface AAT3104-1: 16-step AAT3104-2: 32-step ±10% LED Output Current Accuracy ±3% LED Output Current Matching Low-current Shutdown Mode Built-in Thermal Protection Automatic Soft-start Available in 2x2mm SC70JW-10 Package
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• Applications
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• Cordless Phone Handsets Digital Cameras Mobile Phone Handsets MP3 and PMP Players Typical Application Input Voltage 2.7V to 5.5V C IN 1µF IN C+ CP 1µF CEN/SET S2Cwire.