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


Design files


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.

  • 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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUCX9.PDF (7908 K)

Reference design overview and verified performance test data

TIDRR70.PDF (615 K)

Detailed schematic diagram for design layout and components

TIDRR71.PDF (102 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRR72.PDF (375 K)

Detailed overview of design layout for component placement

TIDRR74.ZIP (2371 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDRR73.PDF (1781 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck converters (integrated switch)

LM51653V-65V, 150mA Synchronous Buck Converter With Ultra-Low IQ

Data sheet: PDF | HTML
Buck converters (integrated switch)

LMR16006SIMPLE SWITCHER® 4V to 60V, 600mA Step-Down Regulator with Low Iq

Data sheet: PDF | HTML
C2000 real-time microcontrollers

TMS320F28027C2000™ 32-bit MCU with 60 MHz, 64 KB flash

Data sheet: PDF
C2000 real-time microcontrollers

TMS320F28027-Q1Automotive C2000™ 32-bit MCU with 60 MHz, 64 KB flash

Data sheet: PDF
Illumination LED drivers

LM340942-V PFET buck controller for high power LED drives

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP5907250-mA, low-noise, high-PSRR, ultra-low-dropout voltage regulator with low IQ and enable

Data sheet: PDF | HTML
Low-side drivers

UCC275114-A/8-A single-channel gate driver with 5-V UVLO, split outputs, and 13-ns Prop delay

Data sheet: PDF | HTML
Low-side drivers

UCC27511A4-A/8-A single-channel gate driver with 5-V UVLO, split outputs, 5-V IN handling

Data sheet: PDF | HTML
N-channel MOSFETs

CSD19538Q2100-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 59 mOhm

Data sheet: PDF | HTML
Precision DACs (≤10 MSPS)

DAC756412-bit, quad channel, ultra-low glitch, vout DAC with 2.5V, 2ppm/°C int. ref. and reset to ze

Data sheet: PDF

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Technical documentation

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Type Title Date
* Design guide 100-W, High-Res 16-bit Color-Tunable, 0.15% Dimmable RGBW LED Driver Ref Design Jun. 06, 2017

Related design resources

Hardware development

LAUNCHXL-F28027 C2000 Piccolo MCU F28027 LaunchPad™ development kit

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