AAT3103 Datasheet | Skyworks Solutions

General Description The AAT3103 is a constant frequency charge-pump based current-source white LED driver capable of driving one to three LEDs up to 30m A, each. The charge pumps automatically switch between 1x mode and 2x mode to maintain the highest efficiency and optimal LED current accuracy and matching. A low external parts count (one 1μF flying capacitor, two small 1μF capacitors at IN and OUT and one current setting resistor) makes the AAT3103 ideally suited for small battery-powered applications. The AAT3103-1/-2 uses Skyworks' Simple Serial Control (S2Cwire™) interface to enable, disable, and program the LED driving current. The AAT3103-4 employs a Pulse Width Modulation (PWM) signal with up to 50k Hz frequency, 10% to 100% duty cycle to program the LED current. A low-current shutdown feature disconnects the load from IN and reduces quiescent current to less than 1µA. Built-in soft-start circuitry prevents excessive inrush current during start-up. Integrated short circuit and thermal protection circuitry protects the device from damage. The AAT3103 is available in a 2 x 2.2mm thermally enhanced Pb-free 10-lead SC70JW-10 package. DATA SHEET Three-Channel Charge-Pump LED Driver Features - Source WLED Driver, up to 3 LEDs at up to 30m A, each - Automatic Switching Between 1x and 2x Modes - 900KHz Switching Frequency - Linear LED Output Current Control - Single-wire, S2Cwire Interface - AAT3103-1: 16-step - AAT3103-2: 8-step - ON/OFF or PWM Interface - AAT3103-4 - ±10% LED Output Current Accuracy - ±3% LED Output Current Matching - Low-current Shutdown Mode - Built-in Short Circuit and Thermal Protection - Automatic Soft-start - 2 x 2.2mm SC70JW-10 Package Applications - Cordless Phone Handsets - Mobile Phone Handsets - MP3 and PMP Players - Digital Cameras Typical Application 3102-1 COUT...