LM3402 #4: 1 LED @ 200 mA, 6 ~ 40V In

Summary

This circuit is designed to drive a parallel array of GaP or GaNbased LEDs at a forward current of 200 mA with a total forward voltage ranging from 2.5V to 3.5V.

LED/inductor current ripple will not exceed 50 mA pk-pk. Average output current varies from 192 mA to 6V to 208 mA at 40V.

The input is 6V to 40V including lowest battery voltage and charging transients. Switching frequency is 450 kHz to 650 kHz depending on LED chemistry (VF).

Specifications

Manufacturer	Texas Instruments
Category	Lighting
Sub-Category	LED Drivers - DC In
Eval Board	Board not Stocked
Voltage In	6 ~ 40 V
Topology	Step Down
Current Out	200 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	8 + 0
Design Author	Texas Instruments
Application / Target Market
Main I.C. Base Part	LM3402
Date Created By Author
Date Added To Library	2011-03