Texas Instruments LM3444 Buck-Boost Topology MR16 LED Bulb Reference Design LM3444MR16BBRB/NOPB LM3444MR16BBRB/NOPB Datenbogen

Texas Instruments

Produktcode

LM3444MR16BBRB/NOPB

LM3444-MR16-Boost Reference Design

NATIONAL SEMICONDUCTOR

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Table of Contents

MR16 Halogen/SSL Retro-Fit Analysis ...................................................................................................................... 3

Differences between Magnetic and Electronic Transformers .................................................................................................... 3

SSL MR16 lamps compatibility concerns with ELVT and ELV dimmers (true retro-fit) ............................................................... 3

Halogen vs SSL MR16 waveforms ............................................................................................................................................... 4

Halogen MR16 .............................................................................................................................................................. 5

LM3444 MR16 Boost Reference Design .................................................................................................................... 7

Operating Specifications ............................................................................................................................................................. 7

Schematic .................................................................................................................................................................................... 8

PCB Layout .................................................................................................................................................................................. 8

Bill of Materials ........................................................................................................................................................................... 9

Typical Performance ................................................................................................................................................................ 10

Dimming Waveforms ................................................................................................................................................................ 13

Thermal Analysis ....................................................................................................................................................... 15

Reference Design Transformer Compatibility ........................................................................................................ 16

Performance with and without Transformer ........................................................................................................... 17

Revision History ......................................................................................................................................................... 20