LM3402HV - 0.5A Constant Current Buck Regulator for High Power LED Drivers from the PowerWise® Family
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Design Tools Reference Designs Knowledge Base

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

General Description


The LM3402/02HV 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


ParametersValues
Topology Constant Current Buck
Input Min Voltage 6 Volt
Input Max Voltage 75 Volt
Output Current 525 mA
Efficiency (peak) 96 %
Output Min .2 Volt
Output Max 73 Volt
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 Yes
PowerWise Yes


Typical Performance


click for larger image


  WEBENCH Live Simulation!
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
LM3402For Vin Range 6V To 42V
LM3404HVFor 1.0A Output Current
Additional Resources
Design Tools


Block Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs 564
Kbytes
14-Dec-08 Download
LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs (Japanese)
600 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.


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
LM3404FSTDIMEVLM3404FSTDIMEV - Fast Dimming and True Constant LED Current Evaluation BoardFull productionN/A
 
Buy Now
1+$40.001-
8 weeksN/A
LM3404MREVALLM3402/LM3404 High Power PSOP-8 Evaluation boardFull productionN/A
 
Buy Now
1+$37.501-
8 weeksN/A
LM3402HVEVALLM3402HVMA (Mini SOIC) - 0.5A Constant Current Buck HV Regulator for HB LEDs (LM3402HVEVAL Board)Full productionN/A
 
Buy Now
1+$37.501-
8 weeksN/A
LM3402HVMRPSOP8NOPB3260RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.35rail
of
95
NSXYTT
L3402
HVMR
8 weeksN/A
LM3402HVMRXPSOP8NOPB3260RoHS Download Full productionN/A
 
Buy Now
1K+$1.35reel
of
2500
NSXYTT
L3402
HVMR
12 weeksN/A
LM3402HVMMMINI SOIC8NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$1.35reel
of
1000
ZXTT
SNFB
6 weeks10000
LM3402HVMMXMINI SOIC8NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$1.35reel
of
3500
ZXTT
SNFB
6 weeks10000

General 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.

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.


Design Tools


TitleSize in Kbytes Date Click link below to Download    
LED Reference Design Library     View    

If you have trouble printing or viewing PDF file(s), see Printing Problems.


Reference Designs
LM3402HV Reference Design - 12 InGaP LEDs, 360 mA
LM3402HV Reference Design - 7 InGaP LEDs, 360 mA
LM3402HV Reference Design - 1 InGaN LED, 350 mA
LM3402HV Reference Design - 2 AlInGaP Red/Amber LEDs, 350 mA
LM3402HV Reference Design - 2 InGaN LEDs, 350 mA
LM3402HV Reference Design - 3 AlInGaP Red/Amber LEDs, 350 mA
LM3402HV Reference Design - 3 InGaN LEDs, 350 mA

Application Notes


TitleSize in Kbytes Date Click link below to 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-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  

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]