LM3404HVEVAL: 1A @ Vin Max, 6 ~ 75V in


The LM3404HV circuit and BOM have been designed to provide a constant forward current of 1.0A to a single LED with a forward voltage of approximately 3.7V from an input of 48V ±10%.

Over the input voltage range of 6V to 75V the average LED current, IF, is 1.0A ±10%, the ripple current, ΔiF, will not exceed 400 mAP-P, and the switching frequency is 200 kHz ± 10%.

The LM3404/04HV Evaluation Board includes a female 6-pin SIP, J1, connector as well as two standard 94mil turret connectors for the cathode and anode connections of the LED array. Figure 1 shows the pinout of J1. Solid 18 or 20 gauge wire with about 1 cm of insulation stripped away makes a convenient, solderless connection to J1.


Manufacturer Texas Instruments
Category Lighting
Sub-Category LED Drivers - DC In
Eval Board Part Number LM3404HVEVAL/NOPB-ND
Eval Board Supplier Texas Instruments
Eval Board Normally In Stock
Voltage In 6 ~ 75 V
Topology Step Down
Current Out 1 A
Voltage Out (Max) Up to Vin (75V Max)
Outputs and Type 1 Non-Isolated
Efficiency @ Conditions >85%, 6 ~ 14V in, 3.7V @ 1 A
>80%, 6 ~ 60V in, 3.7V @ 1 A
Features Current Limit (Adj. or Fixed)
Dimming Control
Open Circuit Protection
Shutdown, Enable, Standby
Thermal Protection
Switching Frequency 250 kHz
Component Count + Extras 10 + 10
Design Author Texas Instruments
Application / Target Market LED Commercial Lighting
LED Home Lighting
LED Signage
LED Solar Streetlight
Main I.C. Base Part LM3404HV
Date Created By Author
Date Added To Library 2011-03

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