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MIC2845A Fiches technique (PDF) - Micrel Semiconductor

MIC2845A Datasheet PDF - Micrel Semiconductor
No de pièce MIC2845A
Télécharger  MIC2845A Télécharger

Taille du fichier   1486.15 Kbytes
Page   18 Pages
Fabricant  MICREL [Micrel Semiconductor]
Site Internet  http://www.micrel.com
Logo MICREL - Micrel Semiconductor
Description High Efficiency 6 Channel Linear WLED Driver with DAM?? Ultra Fast PWM??Control and Dual Low IQ LDOs

MIC2845A Datasheet (PDF)

Go To PDF Page Télécharger Fiches technique
MIC2845A Datasheet PDF - Micrel Semiconductor

No de pièce MIC2845A
Télécharger  MIC2845A Click to download

Taille du fichier   1486.15 Kbytes
Page   18 Pages
Fabricant  MICREL [Micrel Semiconductor]
Site Internet  http://www.micrel.com
Logo MICREL - Micrel Semiconductor
Description High Efficiency 6 Channel Linear WLED Driver with DAM?? Ultra Fast PWM??Control and Dual Low IQ LDOs

MIC2845A Fiches technique (HTML) - Micrel Semiconductor

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MIC2845A Détails du produit

General Description
The MIC2845A is a high efficiency White LED (WLED) driver designed to drive up to six LEDs, greatly extending battery life for portable display backlighting, keypad backlighting, and camera flash in mobile devices. The MIC2845A provides the highest possible efficiency as this architecture has no switching losses present in traditional charge pumps or inductive boost circuits. The MIC2845A provides six linear drivers channels which maintain constant current for up to six LEDs. It features a typical dropout of 40mV at 20mA. This allows the LEDs to be driven directly from the battery eliminating switching noise/losses present with the use of boost circuitry.

Features
WLED Driver
• High Efficiency (no Voltage Boost losses)
• Dynamic Average Matching™ (DAM™)
• Ultra Fast PWM™ control (200Hz to 500kHz)
• Input voltage range: 3.0V to 5.5V
• Dropout of 40mV at 20mA
• Matching better than ±1.5% (typical)
• Current accuracy better than ±1.5% (typical)
• Maintains proper regulation regardless of how many
   channels are utilized

LDOs
• Very low ground current – Typical 35µA
• Stable with 1µF ceramic output capacitor
• Dropout of 150mV at 150mA
• Thermal shutdown and current limit protection
• Available in a 14-pin 2.5mm x 2.5mm Thin MLF®
   package

Applications
• Mobile handsets
• LCD Handset backlighting
• Handset keypad backlighting
• Digital cameras
• Portable media/MP3 players
• Portable navigation devices (GPS)
• Portable applications




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