LM2758

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM2758 SNVS551E – APRIL 2008 – REVISED MAY 2016 LM2758 Switched Capacitor Flash LED Driver in DSBGA Package 1 Features 1 Up to 700-mA 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 mA 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 NUMBER PACKAGE BODY SIZE (MAX) LM2758 DSBGA (12) 2.022 mm × 1.527 mm (1) ...