LM3402HV - 0.5A Constant Current Buck Regulator for High Power LED Drivers from the PowerWise® Family

Datasheet Packaging Samples & Pricing Eval. Boards 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


Parametric Table     expand
Parametric Table    collapse
Topology Constant Current Buck
Input Min Voltage 6 Volt
Input Max Voltage 75 Volt
Output Current 525 mA
Efficiency (peak) 96 %
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 Selection Guide Yes
PowerWise Yes
View Using Catalog


Typical Performance

click for larger image


  WEBENCH Live Simulation!
LM3402HV LED WEBENCH® Custom
Design/Analyze/Build It/Test It
 
6.00 <=		 V in Lower
V		  
<=		 V in Upper
V		  
<= 75.00
Select LED Manufacturer:   and Part #
LED Properties:    Vf:    If:   Rd:
#Series #Parallel  
V LED V I LED A <= 0.5
Ambient Temperature °C <= 100

Try full version of LED WEBENCH®


Also Recommended
LM3402For Vin Range 6V To 42V
LM3404HVFor 1.0A Output Current

Additional Resources

Design Tools (see below)


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 530 Kbytes 6-Jun-07 View Online
Download
LM3402/LM3402HV 0.5A Constant Current Buck Regulator for Driving High Power LEDs (Japanese)
 680 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
LM3404MREVALLM3404MVMR (PSOP) - 1A Constant Current HV Buck Regulator for HB LEDs (LM3404MREVAL board)Full 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+$1.45rail
of
95		NSXYTT
L3402
HVMR
6 weeksN/A
LM3402HVMRXPSOP8NOPB3260RoHS Download Full productionN/A
 
Buy Now 		1K+$1.45reel
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 weeks7500

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.

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 1137 Kbytes 30-Sep-08 Download

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

[Information as of 20-Nov-2008]