MIC2842A

MIC2842A High Efficiency 4 Channel WLED Driver with DAM™ and Single Wire Digital Control General Description Features The MIC2842A is a high efficiency White LED (WLED) High Efficiency (no Voltage Boost losses) driver designed to drive up to four LEDs and greatly Dynamic Average Matching™ (DAM™) extend battery life for portable display backlighting, and Single wire digital control keypad backlighting in mobile devices. The MIC2842A Input voltage range: 3.0V to 5.5V architecture provides the highest possible efficiency by Dropout of 40mV at 20mA eliminating switching losses present in traditional charge pumps or inductive boost circuits. With a typical dropout of Matching better than ±1.5% (typical) 40mV at 20mA, the MIC2842A allows the LEDs to be Current accuracy better than ±1.5% (typical) driven directly from the battery eliminating switching noise Maintains proper regulation regardless of how many and losses present with the use of boost circuitry. channels are utilized The MIC2842A features Dynamic Average Matching™ Available in a 10-pin 2mm x 2mm Thin MLF® package (DAM™) which is specifically designed to provide optimum matching across all WLEDs. The four channels are Applications matched better than ±1.5% typical, ensuring uniform display illumination under all conditions. The LED Mobile handsets brightness is preset by an external resistor and can be Handset LCD backlighting dimmed using a single-wire digital control. The digital Handset keyp...