LM3553 Datasheet (National Semiconductor) - 1.2A Dual Flash LED Driver System

LM3553, 1.2A Dual Flash LED Driver System

The LM3553 is a fixed frequency, current mode step-up DC/ DC converter with two regulated current sinks.

The device is capable of driving loads up to 1.2A from a single-cell Li-Ion battery.

One or more high current flash LEDs can be driven in series either in a high power Flash mode or a lower power

LM3553 Features

* Accurate and Programmable LED Current up to 1.2A in

* 128 Steps Total Solution Size < 30mm2 90% Peak Efficiency Drives 2 LEDs in Series with 1.2A from 5V Input Drives 2 LEDs in Series with 600mA from 3.0V Input D