LM3404 - 1.0A Constant Current Buck Regulator for High Power LED Drivers from the PowerWise® Family

Datasheet Packaging Samples & Pricing Eval. Boards Design Tools Reference Designs Application Notes Knowledge Base

Features
•Integrated 1.0A MOSFET
•VIN Range 6V to 42V (LM3404)
•VIN Range 6V to 75V (LM3404HV)
•1.2A Output Current Over Temperature
•Cycle-by-Cycle Current Limit
•No Control Loop Compensation Required
•Separate PWM Dimming and Low Power Shutdown
•Supports all-ceramic output capacitors and capacitor-less outputs
•Thermal shutdown protection
•SO-8 Package, PSOP-8 Package

General Description

The LM3404/04HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. More...


Applications

•LED Driver
•Constant Current Source
•Automotive Lighting
•General Illumination
•Industrial Lighting
  Typical Application
click for larger image


Parametric Table     expand
Parametric Table    collapse
Topology Buck
Input Min Voltage 6 Volt
Input Max Voltage 42 Volt
Output Current 1000 mA
Efficiency (peak) 96 %
Topology Buck
Input Min Voltage 6 Volt
Input Max Voltage 42 Volt
Output Current 1000 mA
Efficiency (peak) 96 %
Output Min 0.2 Volt
Output Max 40 Volt
Special Features Current Regulation
Adjustable Output Yes
On/Off Pin Yes
Error Flag No
Switching Frequency 1000 kHz
Adj Switch Frequency Yes
Sync Pin No
Step-Down Yes
Step-Up No
Inverting No
Flyback No
RegType Switching Regulator
Temperature Min -40 deg C
Temperature Max 125 deg C
Automotive Selection Guide Yes
PowerWise Yes
View Using Catalog


Typical Performance

click for larger image


  WEBENCH Live Simulation!
LED WEBENCH® Designer

LM3404
 
6.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 42.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?


Also Recommended
LM3401Controller
LM3402For 500mA Output Current
LM3404HVFor Vin Range 6V To 75V
LM3405Fixed Frequency Buck

Additional Resources

Online Seminars Design Tools (see below)

Application Notes (see below)


Block Diagram

click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM3404/04HV 1.0A Constant Current Buck Regulator for Driving High Power LEDs 563 Kbytes 14-Dec-08 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM3404EVALLM3404MA (SOIC) - 1A Constant Current Buck Regulator for HB LEDs (LM3404EVAL Board)Full productionN/A
 
Buy Now 		1+$37.501-
8 weeksN/A
LM3404MREVALLM3402/LM3404 High Power PSOP-8 Evaluation boardFull productionN/A
 
Buy Now 		1+$37.501-
8 weeksN/A
LM3404MASOIC NARROW8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.29rail
of
95		NSZXTT
L3404
MA
6 weeks1000
LM3404MAXSOIC NARROW8NOPB1260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.29reel
of
2500		NSZXTT
L3404
MA
6 weeks7500
LM3404MRPSOP8NOPB3260RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.29rail
of
95		NSXYTT
L3404
MR
6 weeksN/A
LM3404MRXPSOP8NOPB3260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.29reel
of
2500		NSXYTT
L3404
MR
8 weeksN/A
LM3404FSTDIMEVLM3404FSTDIMEV - Fast Dimming and True Constant LED Current Evaluation BoardFull productionN/A
 
Buy Now 		1+$40.001-
N/AN/A

General Description

The LM3404/04HV are monolithic switching regulators designed to deliver constant currents to high power LEDs. Ideal for automotive, industrial, and general lighting applications, they contain a high-side N-channel MOSFET switch with a current limit of 1.5A (typical) for step-down (Buck) regulators. Hysteretic controlled on-time and an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type. LED dimming via pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.

Design Tools

TitleSize in Kbytes Date Click link below to Download    
Matching Driver to LED 543 Kbytes 9-Jan-2008 View Online Download  
Methods and Features of LED Drivers     View    
Contact us for questions on this product     View    

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Reference Designs
•RD-134 - LM3404 Driving a Seoul Semi Zpower P4 1A LED

Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1853: Application Note 1853 COT Drivers Control LED Ripple Current 158 Kbytes 23-Sep-08 Download
AN-1585: Application Note 1585 LM3402 and LM3404 High Power PSOP-8 Evaluation Board 493 Kbytes 4-Oct-07 Download
AN-1545: Application Note 1545 LM3404/LM3404HV Evaluation Board 661 Kbytes 7-Jan-08 Download
AN-1545 (Chinese): Application Note 1545 LM3404/LM3404HV Evaluation Board
 493 Kbytes  
AN-1839: Application Note 1839 LM3402/LM3404 Fast Dimming and True Constant LED Current Evaluation Board 678 Kbytes 10-Dec-08 Download
AN-1839 (Chinese): Application Note 1839 LM3402/LM3404 Fast Dimming and True Constant LED Current Evaluation Board
 746 Kbytes  

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More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-127: Application Note 127 LM143 Monolithic High Voltage Operational Amplifier Applications 441 Kbytes 2-May-04 Download
AN-1500: Application Note 1500 LM3402/02HV Demo Board 29977 Kbytes 5-Jun-07 Download
AN-1500 (Chinese): Application Note 1500 LM3402/02HV Demo Board
 531 Kbytes  
AN-1750: Application Note 1750 LM3406 Evaluation Board 481 Kbytes 9-Sep-08 Download
AN-1954: Application Note 1954 LM3409 Demonstration Board 607 Kbytes 11-Jun-09 Download
AN-181: Application Note 181 3-Terminal Regulator Is Adjustable 165 Kbytes 1-May-04 Download
AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation and Compensation 200 Kbytes 10-May-04 Download
AN-1148 (Japanese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation
 216 Kbytes   Download
AN-1148 (Chinese): Application Note 1148 Linear Regulators: Theory Of Operation and Compensation
 396 Kbytes  
AN-1529: Application Note 1529 LM3430 Evaluation Board 2770 Kbytes 21-Aug-07 Download
AN-1529 (Chinese): Application Note 1529 LM3430 Evaluation Board
 789 Kbytes  

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[Information as of 3-Jul-2009]