LM3402EVAL: 350mA @ Vin Max, 6 ~ 42V in

Summary

The LM3402 circuit and BOM have been designed to provide a constant forward current of 350 mA to a single LED with a forward voltage of approximately 3.5V. (Typical of white, blue, and green LEDs using InGaN technology.)

When powered from a 24V ±5% input the demo board will maintain the average LED current, IF, to within 10% of 350 mA.

Switching frequency for the demo board is 600 kHz ± 10% over the input voltage range of 6V to 42V.

(When using the pin-for-pin compatible LM3402HV the upper bound of input voltage is 75V.)

Specifications

Manufacturer Texas Instruments
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Part Number 296-45740-ND
Eval Board Supplier Texas Instruments
Eval Board Board not Stocked
Voltage In 6 ~ 42 V
Topology Step Down
Current Out 350 mA
Voltage Out (Max) Up to Vin (42V Max)
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions >85%, 6 ~ 16V in, 3.5V @ 350 mA
>80%, 6 ~ 40V in, 3.5V @ 350 mA
Features Current Limit (Adj. or Fixed)
Dimming Control
Open Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Switching Frequency 600 kHz
Component Count + Extras 9 + 11
Design Author Texas Instruments
Application / Target Market
Main I.C. Base Part LM3402
Date Created By Author
Date Added To Library 2011-03

Eval Board

Obsolete
Non-Stock

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Support Documents & Media

LM3402/02HV - User Guide LM3402 - Datasheet AN-1149 - Layout Guidelines for SMPS Ultra Librarian Software:CAD Symbols and Footprints (Zip File) TI's CAD/CAE Symbols and Footprint Search

Media

LM3404_Schematic.JPG LM3402_Board.JPG