LM3551 Datasheet (Texas Instruments)

LM3551, 1A White LED Driver

The LM3551 and LM3552 are fixed frequency, current mode step-up DC/DC converters with two integrated NFETs that can be used for precision LED brightness control.

The devices are capable of driving loads up to 1A from a single-cell Li-Ion battery.

The LM3551 and LM3552 can drive one or more high curr

LM3551 Features

* 1

* 2 Up to 1A Total Drive Current

* Flash Timeout Protection

* Independent Torch/Flash/Shutdown Modes

* LED Disconnect in Shutdown

* Programmable Soft-Start Limits Inrush Current

* Over-Voltage Protection

* Wide Voltage Range 2.7 to 5.5V