Part Number
|
LM3551 |
Manufacturer
|
National Semiconductor |
Description
|
1A White LED Driver |
Published
|
Jan 9, 2006 |
Detailed Description
|
LM3551/LM3552 1A White LED Driver with Flash Timeout Protection
August 2005
LM3551/LM3552 1A White LED Driver with Fla...
|
Datasheet
|
LM3551
|
Overview
LM3551/LM3552 1A White LED Driver with Flash Timeout Protection
August 2005
LM3551/LM3552 1A White LED Driver with Flash Timeout Protection
General 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.
A programmable Timeout function on the FTO pin forces the internal NFETs to turn off after a certain user defined time.
An external SD...
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