18W Primary Side Regulated Flyback LED Driver for T8 Fixtures Reference Design


Design files


This reference design describes an 18W power supply for driving a string of 13 LEDs (3.3V) at 420mA. The targeted application for this design is T8 fixtures transitioning from standard fluorescent tubes to more efficient LEDs. With an operating efficiency of over 87%, an input voltage range of 90 VAC - 275 VAC, and form factor of 282mm x 18mm, this design provides an ideal solution for this application. Test results provided in this design include EMI tests per CISPR22 Class B standard.

  • Supports a wide input voltage range: 90VAC - 275VAC
  • Unique form factor design is ideal for T8 fixtures (282mm x 18mm)
  • Design has a operating efficiency of ≥87%, PFC over ≥95% at all conditions, and THD maintained to ≤18%
  • Test results demonstrate this design's capability to pass CISPR22 Class B EMI test
  • Test results demonstrate this design's capability to pass EFT and surge tests up to 4kV per IEC61000 standards
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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.

TIDU252.PDF (4119 K)

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

TIDC315.ZIP (334 K)

Detailed schematic diagram for design layout and components

TIDR450.PDF (36 K)

Detailed schematic diagram for design layout and components

TIDR451.PDF (92 K)

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

TIDC314.ZIP (61 K)

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


Includes TI products in the design and potential alternatives.

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Technical documentation

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* Test report PMP7672 Test Results Mar. 10, 2014
More literature PMP7672 Magnetic Details Mar. 10, 2014

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