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LM3401LED

LED3401x1 r1.0

Single-channel driver

Design Files

PCB Image

led3401x1-r1.png

BOM

Designator Quantity Description Package Manufacturer Part Number Supplier
U1 1 Hysteretic PFET controller for LED MSOP 8 TI LM3401  
Q1 1 PFET 12A DPAK ON NTD2955  
D1 1 Schottky diode 30V 1A SOD123 NXP PMEG3010ER  
L1 1 Inductor 5mm square SMD      
C1 1 Capacitor MLCC 4.7μF 1210      
R1 1 Resistor (current sense) 0805      
R2 1 Resistor 0805      
R3 1 Resistor 0805      
R4 1 Resistor/jumper 0805      

LED3401x1 r1.2

Changes: reduced board size by moving some components to back side, added ripple reduction capacitor across LED output

Design Files

PCB Image

BOM

Designator Quantity Description Package Manufacturer Part Number Supplier
U1 1 Hysteretic PFET controller for LED MSOP 8 TI LM3401  
Q1 1 PFET 30V 25A DPAK Alpha and Omega AOD417  
D1 1 Schottky diode 30V 1A SOD123 NXP PMEG3010ER  
L1 1 Inductor 5mm square SMD      
C1 1 Capacitor MLCC 4.7μF 1210      
C2 1 Capacitor 1210      
R1 1 Resistor (current sense) 0805      
R2 1 Resistor 0805      
R3 1 Resistor 0805      
R4 1 Resistor/jumper 0805      

LED3401x1 r1.3

Changes: larger diode footprint to accommodate SOD128 package, additional 1206 resistor in parallel with R1. This version is meant to allow higher LED drive currents (up to at least 3A)

Design Files

PCB Image

led3401x1-r1.3.png

Schematic

led3401x1-r1.3-sch.png

BOM

Designator Quantity Description Package Manufacturer Part Number Supplier
U1 1 Hysteretic PFET controller for LED MSOP 8 TI LM3401  
Q1 1 PFET 30V 25A DPAK Alpha and Omega AOD417  
D1 1 Schottky diode 30V 3A SOD128 NXP PMEG3030EP  
L1 1 Inductor 5mm square SMD      
C1 1 Capacitor MLCC 4.7μF 1210      
R1.1 1 Resistor (current sense) 0805      
R1.2 1 Resistor (current sense) 1206      
R2 1 Resistor 0805      
R3 1 Resistor 0805      
R4 1 Resistor/jumper 0805      

-- StephenCavilia 21 Mar 2013

ProjectForm edit

Name LM3401 LED drivers
Summary Constant-current PFET-based power LED driver
Preview
Components
Difficulty Intermediate
Author
Topic attachments
I Attachment Action Size Date Who Comment
led3401x1-r1.3-sch.pngpng led3401x1-r1.3-sch.png manage 42.5 K 05 Apr 2014 - 17:13 StephenCavilia  
led3401x1-r1.3.pngpng led3401x1-r1.3.png manage 22.5 K 05 Apr 2014 - 17:01 StephenCavilia  
led3401x1-r1.pngpng led3401x1-r1.png manage 29.8 K 21 Mar 2013 - 10:58 StephenCavilia  
Topic revision: r2 - 05 Apr 2014, StephenCavilia
 

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