LM2758 Datasheet | Texas Instruments

Product Folder Sample & Buy Technical Documents Tools & Software Support & munity SNVS551E - APRIL 2008 - REVISED MAY 2016 LM2758 Switched Capacitor Flash LED Driver in DSBGA Package 1 Features - 1 Up to 700-m A Output Current - 90% Peak Efficiency - Indicator, Torch, and Flash Modes - Time-Out Circuitry Limits Flash Duration to 814 Milliseconds (Typical) - Adaptive 1× and 1.5× Gains for Maximum Efficiency - True Shutdown - Internal Soft-Start Eliminates Inrush Current - Ultra-Small Solution Size - No Inductor, Only 4 Capacitors and a Resistor Required - 2.022 mm × 1.527 mm × 0.6 mm Thin DSBGA package 2 Applications - Camera Flash in Mobile Phones - Flash for Digital Cameras 3 Description The LM2758 device is an integrated low-noise, highcurrent switched capacitor DC-DC converter with a regulated current sink. The device is capable of driving loads up to 700 m A from a single-cell Li-Ion battery. Maximum efficiency is achieved over the input voltage range by actively selecting the proper gain based on the LED forward voltage and current requirements. One external low-power resistor sets the desired current for indicator, torch, and flash modes. To protect the devices and the flash LED, internal timeout circuitry turns off the LM2758 in case of a faulty prolonged flash mode. Internal soft-start circuitry limits the amount of inrush current during start-up. Device Information(1) PART...