LM3551 Datasheet (1A White LED Driver)

Part: LM3551
Manufacturer: Texas Instruments (official site)
Size: 1.23 MB

LM3551 Key Features

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
1.25MHz Constant Switching Frequency
Small, Low Profile Package, Non-Pullback

Other LM3551 Datasheets

Manufacturer	Part Number	Description
National Semiconductor	LM3551	1A White LED Driver

View all LM3551 datasheets →

LM3551 Description

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 current flash LEDs either in a high power Flash mode or a lower power Torch mode using the TORCH/FLASH pin.