Reference Design Library > Lighting > LED Drivers - DC In > LM3401-MR16DEMO: 1A @ 6.2V Max, 12VAC, MR16

LM3401-MR16DEMO: 1A @ 6.2V Max, 12VAC, MR16

Summary

This design was developed to minimize the current spikes coming out of an electronic transformer to less than 5A, which is a typical transformer rating, when driving an LED MR16 circuit. The off the shelf LED MR16 solutions exhibit spikes that significantly exceed a transformers maximum rated output current which will degrade the reliability of the transformer and reduce its operating lifetime. This LM3401 evaluation board is designed to operate (flicker-free) with common Electronic Low Voltage dimmers, and Electronic Transformers.

This design also generates a constant LED current over most of the power cycle when an electronic transformer is on versus the short bursts of current applied to an LED stack from the off the shelf LED MR16 bulbs. This results in better power factor and more stable circuit operation.

Specifications

Manufacturer Texas Instruments
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Part Number LM3401-MR16DEMO/NOPB-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Voltage In 12 VAC
Topology Step Down
Current Out 1 A
Voltage Out (Max) 6.2 V
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions >80%, 12 VAC, 2 LEDs @ 1 A
Features Current Limit (Adj. or Fixed)
No Output Capacitors
Open Circuit Protection
Over Current Protection
Short Circuit Protection
Under Voltage Protection, Brown-Out
Switching Frequency
Component Count + Extras 18 + 2
Design Author Texas Instruments
Application / Target Market Lighting: LED Commercial Lighting
Main I.C. Base Part LM3401
Date Created By Author
Date Added To Library 2012-02

Eval Board

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Support Documents & Media

LM3401 - Datasheet LM3401-MR16DEMO - User Guide - RD-188 Ultra Librarian Software:CAD Symbols and Footprints (Zip File) TI's CAD/CAE Symbols and Footprint Search

Media

LM3401_MR16DEMO_Schematic_Full.PNG LM3401_MR16DEMO_Baord_Full.jpg LM3401_MR16DEMO_Baord_Full.jpg