LM3402 #5: 1 LED @ 335mA, 6 ~ 40V In

Summary

This circuit is designed to drive a string of 1 or 2 InGaN LEDs at a forward current of 335 mA with a peak-to-peak ripple current of 100 mA or less.

The input is 9V to 16V, with LED current and switching frequency (400 kHz) centered at Vin = 12.8V.

This circuit is rated to withstand input voltage surges up to 25V. This can be increased to 42V by changing Cin and D1 to ratings of 50V or more.

Specifications

Manufacturer Texas Instruments
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Board not Stocked
Voltage In 9 ~ 16 V
Topology Step Down
Current Out 335 mA
Voltage Out (Max) 3.5 V
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions
Features Current Limit (Adj. or Fixed)
Dimming Control
Open Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Switching Frequency
Component Count + Extras 9 + 0
Design Author Texas Instruments
Application / Target Market
Main I.C. Base Part LM3402
Date Created By Author
Date Added To Library 2011-03

Support Documents & Media

LM3402 - Datasheet LM3402 #5 : 335mA at 3.5 V - User Guide AN-1149 - Layout Guidelines for SMPS Ultra Librarian Software:CAD Symbols and Footprints (Zip File) TI's CAD/CAE Symbols and Footprint Search

Media

LM3402_5,_335mA_3.5_V_Schematic.JPG