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MIC2842A

Micrel Semiconductor
Part Number MIC2842A
Manufacturer Micrel Semiconductor
Description High Efficiency 4 Channel WLED Driver
Published Apr 19, 2011
Detailed Description MIC2842A High Efficiency 4 Channel WLED Driver with DAM™ and Single Wire Digital Control General Description Features ...
Datasheet PDF File MIC2842A PDF File

MIC2842A
MIC2842A

Overview
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.
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