Datasheet

LM3444-MR16-Boost Reference Design NATIONAL SEMICONDUCTOR Page 2 of 20
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