LM3409HV - PFET Buck Controller for High Power LED Drives from the PowerWise® Family
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
•2Ω, 1A Peak MosFET Gate Drive
•VIN Range: 6V to 42V (LM3409)
•VIN Range: 6V to 75V (LM3409HV)
•Differential, High-side Current Sense
•Cycle-by-Cycle Current Limit
•No Control Loop Compensation Required
•10,000:1 PWM Dimming Range
•250:1 Analog Dimming Range
•Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
•Low Power Shutdown
•Thermal Shutdown Protection
•Thermally Enhanced eMSOP-10 Package

General Description

The LM3409/09HV are P-channel MosFET (PFET) controllers for step-down (buck) current regulators. More...


Applications

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

Typical Application

ParametersValues
Topology Buck
Input Min Voltage 6 Volt
Input Max Voltage 75 Volt
Output Range 1.24V to VIN
Efficiency (peak) 97 %
Output Min 1.24 Volt
Output Max 75 Volt
Special Features Analog and PWM Dimming
Adjustable Output Yes
On/Off Pin Yes
Error Flag No
Adj Switch Frequency Yes
Sync Pin No
Step-Down Yes
Step-Up No
Inverting No
Flyback No
RegType LED Driver
Temperature Min -40 deg C
Temperature Max 125 deg C
Feedback Voltage .248 Volt
Automotive No
PowerWise Yes


Typical Performance

*click for larger image

Efficiency
  WEBENCH Live Simulation!
WEBENCH Power Designer My Designs

LM3409HV
 
6.00 <=		 V in Lower
 V		  
<=		 V in Upper
 V		  
<= 75.00
Ambient Temperature  °C <= 100


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Also Recommended
LM3409▲PFET Buck Controller With Input Voltage Up To 42V
Block Diagram
click for larger image

Block Diagram

Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM3409 LM3409HV PFET Buck Controller for High Power LED Drives 978
Kbytes		 12-Jun-09 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
LM3409HVMYMINI SOIC EXP PAD10NOPB3260RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$1.50reel
of
1000		ZXTT
SYHB
6 weeksN/A
LM3409HVMYXMINI SOIC EXP PAD10NOPB3260RoHS N/A Full productionN/A
 
Buy Now 		1K+$1.50reel
of
3500		ZXTT
SYHB
6 weeksN/A
LM3409HVEVALLM3409HV High Voltage LED Buck Controller Evaluation BoardFull productionN/A
 
Buy Now 		1+$81.001-
8 weeksN/A

General Description

The LM3409/09HV are P-channel MosFET (PFET) controllers for step-down (buck) current regulators. They offer wide input voltage range, high-side differential current sense with low adjustable threshold voltage, fast output enable/disable function and a thermally enhanced eMSOP-10 package. These features combine to make the LM3409/09HV ideal for use as constant current sources for driving LEDs where forward currents up to 5A are easily achievable. The LM3409/09HV uses Constant Off-Time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. Analog and PWM dimming are easy to implement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, 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)
LM3409HVMYABCD150XV1038680025950002736338335
LM3409HVMYXABCD150XV1038680025950002736338335

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.

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Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1953: Application Note 1953 LM3409HV Evaluation Board 722
Kbytes		 11-Jun-09 Download
AN-1953 (Chinese): Application Note 1953 LM3409HV Evaluation Board
 632 Kbytes  
AN-1954: Application Note 1954 LM3409 Demonstration Board 607
Kbytes		 11-Jun-09 Download
AN-1954 (Chinese): Application Note 1954 LM3409 Demonstration Board
 502 Kbytes  

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

[Information as of 8-Nov-2009]