Step-Up Converter For White LED Applications

The LM3557 is a complete solution for white LED drive applications. With minimal external component count, no DC current leakage paths to ground, cycle-by-cycle current limit protection, and output over-voltage protection circuitry, the LM3557 offer superior performance and cost savings over standard DC/DC boost component implementations.
The LM3557 switches at a fixed-frequency of 1.25 MHz, which allows for the use of small external components. Also, the LM3557 has a wide input voltage range to take advantage of multi-cell input applications. With small external components, high fixed frequency operation, and wide input voltage range, the LM3557 is the most optimal choice for LED lighting applications.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LM3557SD-2/NOPB Texas Instruments Step-Up Converter for White LED Applications 8-WSON -40 to 85
LM3557 's PackagesLM3557 's pdf datasheet
LM3557SD-2 LLP
LM3557SDX-2 LLP




LM3557 Pinout, Pinouts
LM3557 pinout,Pin out
This is one package pinout of LM3557,If you need more pinouts please download LM3557's pdf datasheet.

LM3557 Application circuits
LM3557 circuits
This is one application circuit of LM3557,If you need more circuits,please download LM3557's pdf datasheet.


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