LM3402HV   
0.5A Constant Current Buck Regulator for High Power LED Drivers from the PowerWise® Family		 Click link to Download

Features
•Integrated 0.5A N-channel MOSFET
•VIN Range from 6V to 42V (LM3402)
•VIN Range from 6V to 75V (LM3402HV)
•500 mA 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
•MSOP-8, PSOP-8 Packages

Description

The LM3402/02HV 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 735 mA (typical) for step-down (Buck) regulators. Hysteretic control with controlled on-time coupled with an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series - parallel connected arrays of LEDs of varying number and type, LED dimming by pulse width modulation (PWM), broken/open LED protection, low-power shutdown and thermal shutdown complete the feature set.

Applications
•LED Driver
•Constant Current Source
•Automotive Lighting
•General Illumination
•Industrial Lighting
WEBENCH Power Designer My Designs

LM3402HV
 
6.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 75.00
Ambient Temperature  °C <= 100


What are WEBENCH® tools?

Also Recommended
LM3402▲For Vin Range 6V To 42V
LM3404HV▲For 1.0A Output Current



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Typical Application
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Block Diagram
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Typical Performance
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Paramaters / ValuesLM3402HV LM3402 LM3404HV
TopologyConstant Current Buck Constant Current Buck Buck
Input Min Voltage6 Volt 6 Volt 6 Volt
Input Max Voltage75 Volt 42 Volt 75 Volt
Output Current525 mA 525 mA 1000 mA
Efficiency (peak)96 % 96 % 96 %
Output Min.2 Volt .2 Volt 0.2 Volt
Output Max73 Volt 40 Volt 73 Volt
Adjustable OutputYes Yes Yes
On/Off PinYes Yes Yes
Error FlagNo No No
Switching Frequency1000 kHz 1000 kHz 1000 kHz
Adj Switch FrequencyYes Yes Yes
Sync PinNo No No
Step-DownYes Yes Yes
Step-UpNo No No
InvertingNo No No
FlybackNo No No
RegTypeSwitching Regulator Switching Regulator Switching Regulator
Temperature Min-40 deg C -40 deg C -40 deg C
Temperature Max125 deg C 125 deg C 125 deg C
AutomotiveYes Yes Yes
PowerWiseYes Yes Yes
Part Number(s)
(NSID)		Top ViewAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM3402HVMR/NOPB

RoHS



PSOP		Full production
Lead Time: 8 weeks

Samples
DistributorRegionQty
ARROWWorldwide3510
DIGIKEYWorldwide51
FUTUREWorldwide379
NEWARKAmericas243
RS COMPONENTSWorldwide25
$1.35 each at 1K+ pcsrail
of
95
LM3402HVMRX/NOPB

RoHS



PSOP		Full production
Lead Time: 8 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.35 each at 1K+ pcsreel
of
2500
LM3402HVMM/NOPB

RoHS



MINI SOIC		Full production
Lead Time: 6 weeks

Samples
DistributorRegionQty
AVNET-EMWorldwide1000
DIGIKEYWorldwide1578
FARNELLEurope and Asia1073
FUTUREWorldwide194
NEWARKAmericas58
RSL MICROAsia Pacific3000
$1.35 each at 1K+ pcsreel
of
1000
LM3402HVMMX/NOPB

RoHS



MINI SOIC		Full production
Lead Time: 6 weeks

 
DistributorRegionQty
DIGIKEYWorldwide0
$1.35 each at 1K+ pcsreel
of
3500

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM3402HVEVAL
LM3402HVMA (Mini SOIC) - 0.5A Constant Current Buck HV Regulator for HB LEDs (LM3402HVEVAL Board)Full production


 
DistributorRegionQty
DIGIKEYWorldwide7
FUTUREWorldwide11
NATIONALWorldwide20
$37.50 each1
LM3402HVMA 0.5A Constant Current Buck Regulator for Driving High Power LEDs

General Features:
  • Integrated 0.5A N-Channel MOSFET
  • Vin Range from 6V to 75V (LM3402HV)
  • 500 mA 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
  • Thermanl shutdown protection
  • MSOP-package
Applications:
  • LED Driver
  • Constant Current Source
  • Automotive Lighting
  • General Illumination
  • Industrial Lighting
LM3402HVEVAL Package Includes:
  • A fully assembled LM3402MAHV based evaluation board
  • LM3402HV datasheet
  • AN-1500 - LM3402/HV (Mini SOIC package) evaluation board appnote

Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM3404FSTDIMEV
LM3404FSTDIMEV - Fast Dimming and True Constant LED Current Evaluation BoardFull production
Lead Free (RoHS)

 
DistributorRegionQty
FUTUREWorldwide1
NATIONALWorldwide2
$40.00 each1

Description:

The LM3404/04HV are buck regulator derived controlled current sources designed to drive a series string of high power, high brightness LEDs (HBLEDs) at forward currents of up to 1.0A (LM3404/04HV). This evaluation board demonstrates the enhanced thermal performance, fast dimming and true constant LED current capabilities of the LM3402 and LM3404 devices.

Contents:


Part Number(s)
(NSID)		DescriptionAvailabilityCurrent Reported StockBudgetary PricingStandard Pack Size
LM3404MREVAL
LM3402/LM3404 High Power PSOP-8 Evaluation boardFull production


 
DistributorRegionQty
DIGIKEYWorldwide4
FUTUREWorldwide7
NATIONALWorldwide110
$37.50 each1
General 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

Applications:

  • LED Driver
  • Constant Current Source
  • Automotive Lighting
  • General Illumination
  • Industrial Lighting

LM3404MREVAL Package Includes:

  • A fully assembled LM3404HVMR PSOP based evaluation board
  • LM3404HV datasheet
  • AN-1585 - LM3404/HV (PSOP package) evaluation board appnote

Part Number(s)
(NSID)		Top ViewTypePinsMSL RatingPeak ReflowRoHSCAD SymbolsModelsPackage
Marking
Format
LM3402HVMR/NOPB
PSOP83260RoHSDownloadN/A
NSXYTT
L3402
HVMR
LM3402HVMRX/NOPB
PSOP83260RoHSDownloadN/A
NSXYTT
L3402
HVMR
LM3402HVMM/NOPB
MINI SOIC81260RoHSDownloadN/A
ZXTT
SNFB
LM3402HVMMX/NOPB
MINI SOIC81260RoHSDownloadN/A
ZXTT
SNFB

Reliability Metrics
Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM3402HVMMABCD150XV1038680025950002736338335
LM3402HVMMXABCD150XV1038680025950002736338335
LM3402HVMRABCD150XV1038680025950002736338335
LM3402HVMRXABCD150XV1038680025950002736338335

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.


LED Driver Design for General Illumination
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Automotive LED Lighting Challenges & Solutions
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LED Driver Design for General Illumination
Date: 5/4/2009
Length: 0:36:55

Automotive LED Lighting Challenges & Solutions
Date: 4/14/2009
Length: 0:35:00

[Information as of 20-Nov-2009]