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reference designLM3409

Texas Instruments LM3409

100-W, High-Resolution, 16-bit Color-Tunable, 0.15% Dimmable RGBW LED Luminaire Reference Design

Overview

TopologyBuck Converter
Input voltage28-42 V
IC revisionE1

Description

This reference design demonstrates the finest range of color control of individual RGBW LED strings with > 16 bits of PWM resolution while supporting the PWM modulation frequencies as high as 30 and 50 kHz. This reference design demonstrates the finest range of individual RGBW LED strings color control and enables development of highly efficient DC-DC LED luminaires capable of wide color gamut generation with trillions of colors while at the same time being imperceptible to high-end cameras and video broadcast equipment.

Features

  • Four buck current controllers driving RGBW LED strings at 30V and string current of up to 0.75A (also tested up to 1.25A)
  • LED buck current controllers efficiency exceeding 96% at full load with maximum operating frequency up-to 600 kHz
  • 100% to 0.2% Contrast setting for PWM dimming method at 30 and 50 kHz
  • 100% to 0.15% Contrast setting and better Linearity for Shunt dimming mode at 30 and 50 kHz
  • High-resolution PWM feature of C2000™ with 180-ps step enables current adjustment with resolution > 16 bits for both PWM and Shunt FET methods even at 50kHz dimming frequency
  • 4Ch, 12bit DAC used for IADJ setting of individual LED strings to enable analog dimming

Typical applications

  • Indoor Lighting / Stage Lighting
  • LED Power Supply

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
C
Tol. C
VR(V (DC))
Size
Operating Temperature
Q
DF(%)
RISO
Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
Packaging
L(µH)
IR(mA)
ISAT(A)
fres(MHz)
Mount
ISAT,10%(A)
ISAT,30%(A)
IR,40K(A)
IRP,40K(A)
Version
Z @ 100 MHz(Ω)
Zmax(Ω)
Test Condition Zmax
IR 2(mA)
RDC max.(Ω)
Type
SamplesAvailability & Sample
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885012005056
SPECWCAP-CSGP MLCCs 50 V(DC), 15 pF, ±5%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance15 pF
Capacitance±5% 
Rated Voltage50 V (DC)
Size0402 
Operating Temperature -55 °C up to +125 °C
Q-Factor700 
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Insulation Resistance10 GΩ
Ceramic TypeNP0 Class I 
Length1 mm
Width0.5 mm
Height0.5 mm
Pad Dimension0.25 mm
Packaging7" Tape & Reel 
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885012207092
SPECWCAP-CSGP MLCCs 50 V(DC), 10 nF, ±10%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 50 V(DC)
Capacitance10 nF
Capacitance±10% 
Rated Voltage50 V (DC)
Size0805 
Operating Temperature -55 °C up to +125 °C
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Dissipation Factor2.5 %
Insulation Resistance10 GΩ
Ceramic TypeX7R Class II 
Length2 mm
Width1.25 mm
Height0.8 mm
Pad Dimension0.5 mm
Packaging7" Tape & Reel 
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742792662
SPECWE-CBF SMT EMI Suppression Ferrite Bead, –, –
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-CBF SMT EMI Suppression Ferrite Bead
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Size0603 
Operating Temperature -55 °C up to +125 °C
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Length1.6 mm
Width0.8 mm
Height0.8 mm
Pad Dimension0.3 mm
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Rated Current600 mA
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MountSMT 
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VersionSMT 
Impedance @ 100 MHz1000 Ω
Maximum Impedance1050 Ω
Maximum Impedance120 MHz 
Rated Current 2830 mA
DC Resistance0.3 Ω
TypeWide Band 
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744053150
SPECWE-TPC SMT Tiny Power Inductor, –, –
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-TPC SMT Tiny Power Inductor
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Size5828 
Operating Temperature -40 °C up to +125 °C
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Length5.8 mm
Width5.8 mm
Height2.8 mm
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Inductance15 µH
Rated Current1380 mA
Saturation Current1.15 A
Self Resonant Frequency20 MHz
MountSMT 
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VersionSMT 
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DC Resistance0.1 Ω
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744770147
SPECWE-PD SMT Power Inductor, –, –

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-PD SMT Power Inductor
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Size1280 
Operating Temperature -40 °C up to +125 °C
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Length12 mm
Width12 mm
Height8 mm
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Inductance47 µH
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Self Resonant Frequency7.9 MHz
MountSMT 
Saturation Current @ 10%3.3 A
Saturation Current @ 30%4.3 A
Rated Current3 A
Performance Rated Current4.25 A
VersionStandard 
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DC Resistance0.064 Ω
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