Typical Application for MIC2841A: High Efficiency 4 Channel Linear WLED Driver with DAM and Ultra Fast PWM Control

Typical Application for MIC2841A: High Efficiency 4 Channel Linear WLED Driver with DAM and Ultra Fast PWM Control. The MIC2841A is a high efficiency White LED (WLED) driver designed to drive up to four WLEDs, greatly extending battery life for portable display backlighting, keypad backlighting and camera flash in mobile devices. The MIC2841A provides the highest possible efficiency as this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. The MIC2841A provides four linear driver channels which maintain constant current for up to four WLEDs. It features a typical dropout of 40mV at 20mA. This allows the WLEDs to be driven directly from the battery eliminating switching noise/losses present with the use of boost circuitry