LM2754 Datasheet | Texas Instruments

.ti. SNVS463A - SEPTEMBER 2006 - REVISED MAY 2013 LM2754 800m A Switched Capacitor Flash LED Driver with Time-Out Protection Check for Samples: LM2754 Features - 2 Up to 800m A Output Current - Wide Operating Input Voltage Range: 2.8V to 5.5V - Drives 1, 2, 3 or 4 LEDs in Parallel - Ability to Disable One Current Sink Via the SEL Pin to Acmodate 3-LED Flash Modules - Time-Out Circuitry Limits Flash Duration to 1 Second - TX Input Ensures Synchronization with RF Power Amplifier Pulse - Adaptive 1x, 1.5x and 2x Gains for Maximum Efficiency - 1MHz Constant Frequency Operation - Output Current Limit - True Shutdown Output Disconnect - <1µA Shutdown Current - Internal Soft-Start Limits Inrush Current - No Inductor Required - Total Solution Size without LED <28mm2 - Low Profile 24-Pin WQFN Package (4mm x 4mm x 0.8mm) APPLICATIONS - Camera Flash in Mobile Phones - Flash for Digital Cameras - Supplies for DSP’s, Microprocessors, Memory, MP3 Players, Pagers, Other Portable Devices DESCRIPTION The LM2754 is an integrated low noise, high current switched capacitor DC/DC converter with four regulated current sinks. The device is optimized for driving 1 to 4 high power white LEDs in parallel with a maximum current of 800m A. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current...