AAT3103 Datasheet | Advanced Analog Technology

PRODUCT DATASHEET Charge Pump TM 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 Analogic Tech's 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 2x2.1mm thermally enhanced Pb-free 10-lead SC70JW-10 package. 3-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 2x2.1mm SC70JW-10 Package - - - - - - Applications - - - - Cordless Phone Handsets Mobile Phone Handsets MP3 and PMP Players Digital Cameras Typical Application Input Voltage 2.7V to 5.5V C IN 1μF IN C+ OUT CP 1μF AAT3103-1 C- C OUT 1μF EN/SET S2Cwire Interface EN/SET D1 D2 RSET D3 RSET...