120Vac TRIAC Dimmable LED Driver Reference Design


Design files


This reference design provides a high-brightness LED driver based on the TPS92075. It is designed to
operate with an input voltage in the range of 90VAC to 132VAC with a 120 VAC nominal input voltage. This design is set up for an 185mA output current with an output voltage range of 46 to 54V.

The ‘Max at Max’ circuit uses simple low cost components to adjust the converter off-time and the output current. A small capacitance transfers a small amount of energy when the triac edge is present, filters it and creates a small current which adds to the existing off-time charge current from VCC. The effect is a shortened off time and increased output current, only when a triac is present.

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.

SLVUA66.PDF (704 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


Includes TI products in the design and potential alternatives.

Illumination LED drivers

TPS92075Non-isolated, phase dimmable, buck PFC LED driver with digital reference control

Data sheet document-pdfAcrobat PDF

Technical documentation

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Type Title Date
Test report PMP6015 Test Results Apr. 09, 2014

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