LM3401   
Hysteretic PFET Controller for High Power LED Drive from the PowerWise® Family		 Click link to Download

Features
•Hysteretic Control for Speed and Simplicity
•Input Operating Range of 4.5V-35V
•1.5MHz maximum switching frequency
•Low 200mV reference voltage
•Programmable current limit
•High speed CMOS compatible enable/dimming
•Adjustable hysteresis
•Input UVLO
•No output capacitor required
•MSOP-8 package

Description

The LM3401 is a switching controller designed to provide constant current to high power LEDs. The LM3401 drives an external P-MOSFET switch for step-down (Buck) regulators. The LM3401 delivers constant current within ±6% accuracy to a wide variety and number of series connected LEDs. Output current is adjusted with an external current sensing resistor to drive high power LEDs in excess of 1A.

For improved accuracy and efficiency, the LM3401 features dual-side hysteresis, very low reference voltage, and short propagation delay. A cycle by cycle current limit provides protection against over current and short circuit failures. Additional features include adjustable hysteresis and a CMOS compatible input pin for PWM dimming.

Applications
•LED Driver
•Battery Charger
WEBENCH Power Designer My Designs

LM3401
 
4.50 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 35.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?

Also Recommended
LM3409▲Input Voltage To 42V
LM3409HV▲Input Voltage To 75V



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Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLM3401 LM3409 LM3409HV
TopologyBuck Hysteretic Controller Buck Buck
Input Min Voltage4.5 Volt 6 Volt 6 Volt
Input Max Voltage35 Volt 42 Volt 75 Volt
Output Range200 mV to Vin 1.24V to VIN 1.24V to VIN
Efficiency (peak)92 % 97 % 97 %
Output Min0.2 Volt 1.24 Volt 1.24 Volt
Special FeaturesAdjustable Hysteresis, 200 mV Reference Analog and PWM Dimming Analog and PWM Dimming
Adjustable OutputYes Yes Yes
On/Off PinYes Yes Yes
Error FlagNo No No
Switching Frequency1500 kHz
Adj Switch FrequencyNo Yes Yes
Sync PinNo No No
Step-DownYes Yes Yes
Step-UpNo No No
InvertingNo No No
FlybackNo No No
RegTypeSwitching Controller LED Driver LED Driver
Temperature Min-40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C
AutomotiveYes No No
PowerWiseYes Yes Yes

Datasheets
TitleSizeDateOther
Language
LM3401 Hysteretic PFET Controller for High Power LED Drive390
Kbytes		13-Mar-08 


Featured Application Notes
TitleSizeDateOther
Language
AN-1657: Application Note 1657 LM3401 Demo Board891
Kbytes		29-Jul-08 中文


More Application Notes
TitleSizeDateOther
Language
AN-103: Application Note 103 LM340 Series Three Terminal Positive Regulators421
Kbytes		3-Oct-02 
AN-1192: Application Note 1192 Overture™ Series High Power Solutions548
Kbytes		15-Jun-04 
AN-1982: Application Note 1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool63
Kbytes		15-Jul-09 
AN-1839: Application Note 1839 LM3402/LM3404 Fast Dimming and True Constant LED Current Evaluation Board678
Kbytes		10-Dec-08 中文
AN-1545: Application Note 1545 LM3404/LM3404HV Evaluation Board665
Kbytes		14-Aug-09 中文
AN-1585: Application Note 1585 LM3402 and LM3404 High Power PSOP-8 Evaluation Board493
Kbytes		4-Oct-07 
AN-1500: Application Note 1500 LM3402/02HV Demo Board29977
Kbytes		5-Jun-07 中文
AN-127: Application Note 127 LM143 Monolithic High Voltage Operational Amplifier Applications441
Kbytes		2-May-04 
AN-298: Application Note 298 Isolation Techniques for Signal Conditioning379
Kbytes		2-Oct-02 
AN-182: Application Note 182 Improving Power Supply Reliability with IC Power Regulators27
Kbytes		3-Oct-02 
AN-1853: Application Note 1853 COT Drivers Control LED Ripple Current158
Kbytes		23-Sep-08 
AN-1763: Application Note 1763 LM3407 Evaluation Board Reference Design421
Kbytes		21-Jan-09 中文
AN-1954: Application Note 1954 LM3409 Demonstration Board762
Kbytes		20-Nov-09 中文
AN-1750: Application Note 1750 LM3406 Evaluation Board481
Kbytes		9-Sep-08 
AN-1590: Application Note 1590 LM3405 Demo Board475
Kbytes		19-Mar-07 
AN-1644: Application Note 1644 Powering and Dimming High-Brightness LEDs with the LM3405 Constant-Current Buck Regulator174
Kbytes		17-Jan-08 
AN-181: Application Note 181 3-Terminal Regulator Is Adjustable165
Kbytes		1-May-04 
AN-1953: Application Note 1953 LM3409HV Evaluation Board737
Kbytes		20-Nov-09 中文
AN-1529: Application Note 1529 LM3430 Evaluation Board2770
Kbytes		21-Aug-07 中文
AN-1148: Application Note 1148 Linear Regulators: Theory Of Operation and Compensation200
Kbytes		10-May-04日本語
中文

Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM3401MM/NOPB

RoHS Status



MINI SOIC		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AITGAsia Pacific1001
ARROWWorldwide9468
AVNET-EMWorldwide1000
DIGIKEYWorldwide7864
FUTUREWorldwide1100
NEWARKAmericas238
RS COMPONENTSWorldwide225
$0.70 each at 1K+ pcsreel
of
1000
LM3401MMX/NOPB

RoHS Status



MINI SOIC		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide1100
$0.70 each at 1K+ pcsreel
of
3500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM3401EVAL
LM3401 Hysteretic PFET Controller for High Power LED DriveFull production


 
DistributorRegionQty
DIGIKEYWorldwide0
FUTUREWorldwide6
NATIONALWorldwide50
$37.50 each1

Features:

  • Hysteretic Control for Speed and Simplicity
  • Input Operating Range of 4.5V-35V
  • 1.5MHz maximum switching frequency
  • Low 200mV reference voltage
  • Programmable current limit
  • High speed CMOS compatible enable/dimming
  • Adjustable hysteresis
  • Input UVLO
  • No output capacitor required
  • MSOP-8 package

Applications:

  • LED Driver
  • Battery Charger

Contnets:

  • A LM3401 Fully Assembled Evaluation Board
  • A LM3401 Datasheet
  • A LM3401 Evaluation Board Appnote

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHS
Status		CAD SymbolsModelsPackage
Marking
Format
LM3401MM/NOPB
MINI SOIC81260DetailDownloadN/A
ZXTT
SNHB
LM3401MMX/NOPB
MINI SOIC81260DetailDownloadN/A
ZXTT
SNHB

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Design Tools
TitleSizeDate
LM3401 Component Calculator171 Kbytes28-Apr-2008
LED Reference Design Library  
Article - Driving high-power LEDs in series-parallel arrays  

CAD Symbols and Models
Download LM3401 CAD Symbols
 Models
N/A

WEBENCH Power Designer My Designs

LM3401
 
4.50 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 35.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM3401MMABCD15003417500423400011201409060
LM3401MMXABCD15003417500423400011201409060

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

LED Driver Design for General Illumination
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LED Driver Design for General Illumination
Date: 5/4/2009
Length: 0:36:55

[Information as of 22-Mar-2010]