AAT3193

AAT3192/93 Low-Cost, 2-/3-Channel Charge-Pump LED Drivers General Description The AAT3192 and AAT3193 are charge-pump based, current-sink white LED drivers capable of driving one to three LEDs up to 30mA, each. They automatically switch between 1x mode and 2x mode to maintain the highest efficiency and optimal LED current accuracy and matching. The AAT3192/93 charge pump’s 1x mode (bypass mode) has very low resistance allowing LED current regulation to be maintained with input supply voltage approaching the LED forward voltage. The AAT3192 and the AAT3193 are available in a 2x2mm 10-lead SC70JW-10 packages. Features ChargePump™ Drives up to 3 LEDs at up to 30mA, each Automatic Switching Between 1x and 2x Modes 0.9MHz Switching Frequency Linear LED Output Current Control — Single-wire, S2Cwire Interface AAT3192/93-1: 16-step AAT3192/93-2: 8-step AAT3192/93-3: 4-step — ON/OFF or PWM Interface AAT3192/93-4 ±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 Applications www.DataSheet4U.com Low-cost Low-cost Low-cost Low-cost 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+ OUT Input Voltage 2.7V to 5.5V C IN 1μF IN C+ OUT CP 1μF AAT3192-1 CEN/SET RSET GND D1 D2 C OUT 1μF CP 1μF AAT3193-1 C- COUT 1μF WLEDs OSR...