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LM3552 - 1A White LED Driver

Download the LM3552 datasheet PDF. This datasheet also covers the LM3551 variant, as both devices belong to the same 1a white led driver family and are provided as variant models within a single manufacturer datasheet.

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.

Key Features

  • n n n n n n n n n 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 LLP14 (4mm x 4mm).

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3551_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM3552 1A White LED Driver Texas Instruments

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM3551 1A White LED Driver
LM3553 1.2A Dual Flash LED Driver System
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LM350 3-Amp Adjustable Regulators
LM3501 Synchronous Step-up DC/DC Converter
LM3502 Step-Up Converter
LM3503 Dual-Display Constant Current LED Driver
LM350A 3-Amp Adjustable Regulators
LM351 Dual Peripheral Drivers

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 pin (LM3551) or EN pin (LM3552) is available to put the device into low power shutdown mode.