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