MIC2841A Datasheet | Micrel Semiconductor

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 500k Hz) 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 40m V at 20m A 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 40m V at 20m A. 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 illumination under all conditions. The brightness is controlled through an Ultra Fast PWM™ interface - Flash driver operating down to less than 1% duty cycle. - Digital cameras The MIC2841A is available in the 2mm x 2mm 10-pin Thin - Portable media/MP3 players MLF® leadless package with a junction temperature range - Portable navigation devices (GPS) of -40°C to +125°C. - Portable applications Datasheets and support documentation can be found on Micrel’s web site at: .micrel.. ____________________________________________________________________________________________________________ Typical...