LM3555 Datasheet - Texas Instruments

LM3555 Synchronous Boost Converter

The LM3555 is a 2-MHz fixed-frequency, currentmode synchronous boost converter designed to drive either a single flash LED at 500 mA or two series flash LEDs at 400 mA. A high-voltage current source allows the LEDs to be terminated to the GND plane eliminating the need for an additional return trace.

LM3555 Features

* 1 High-Voltage High-Side Current Source Allows for Grounded Cathode LED Operation

* Synchronous Boost Converter

* Peak Converter Efficiency > 90%

* Accurate and Programmable LED Current Ranging From 60 mA to 500 mA

* Adaptive LED Current Range Based on LED Co

LM3555 Datasheet (1.25 MB)