MIC2841A

MIC2841A High Efficiency 4 Channel Linear WLED Driver with DAM™ and Ultra Fast PWM™ Control General Description Features The MIC2841A is a high efficiency White LED (WLED) High Efficiency (no Voltage Boost losses) driver designed to drive up to four WLEDs, greatly Dynamic Average Matching™ (DAM™) extending battery life for portable display backlighting, Ultra Fast PWM™ control (200Hz to 500kHz) keypad backlighting and camera flash in mobile devices. Input voltage range: 3.0V to 5.5V The MIC2841A provides the highest possible efficiency as Dropout of 40mV at 20mA this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. The Matching better than ±1.5% (typical) MIC2841A provides four linear driver channels which Current accuracy better than ±1.5% (typical) maintain constant current for up to four WLEDs. It features Maintains proper regulation regardless of how many a typical dropout of 40mV at 20mA. This allows the channels are utilized WLEDs to be driven directly from the battery eliminating Available in a 10-pin 2mm x 2mm Thin MLF® package switching noise/losses present with the use of boost circuitry. Applications The MIC2841A features Dynamic Average Matching™ (DAM™) which is specifically designed to provide optimum Mobile handsets matching across all WLEDs. The four channels are Handset LCD backlighting matched better than ±1.5% typical, ensuring uniform Handset keypad backlighting display illumina...