Advanced Dimming Capable Buck LED Driver Reference Design for Industrial IR LED Applications


Design files


This reference design showcases a small form-factor LED driver (TPS92515) optimized to drive up to five infrared (IR) LEDs for industrial cameras and other general lighting designs. It can drive up to 1 A through LED loads of up to 9.5-V from a 24-V input source. The buck topology is implemented as a secondary-stage LED driver which is simple, high performance and cost effective. Additional design flexibility includes analog and PWM dimming (including shunt FET dimming) support as well as EMI filtering designed to meet FCC part 15 class B conduction requirements.

  • Optimized for infrared LEDs and other small form-factor LED lighting applications
  • FCC part 15 class B tested EMI
  • Small inductor size (4 mm X 4 mm)
  • Analog and PWM dimming
  • Supports high-frequency shunt FET dimming up to 30 kHz
Output voltage options PMP15022.1
Vin (Min) (V) 21
Vin (Max) (V) 27
Vout (Nom) (V) 9
Iout (Max) (A) 1
Output Power (W) 9
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Non Sync

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.

TIDUCQ5.PDF (8711 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement


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

TIDCD48.ZIP (396 K)

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


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Illumination LED drivers

TPS9251542-V 2-A LED driver with integrated NFET, high-side current sense, and shunt PWM dimming capable

Data sheet document-pdfAcrobat PDF open-in-new HTML
Noninverting buffers & drivers

SN74LVC1G17Single 1.65-V to 5.5-V buffer with Schmitt-Trigger inputs

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report Advanced Dimming Capable Buck LED Driver Ref Design for Industrial IR LEDs Jan. 30, 2017

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