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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