110-VAC to 5-VDC @ 30-mA Non-Isolated Power Supply Reference Design


Design files


This 110-VAC to 5-VDC at 30-mA non-isolated power supply reference design uses a low-power, low-cost, off-line buck converter and a low-noise, low-dropout voltage regulator to generate a non-isolated 5-V/30-mA output directly from a 110-VAC line input with under 10-mV output ripple across no-load and full-load conditions. Off-line converters are powered directly from the AC line by using a rectifier and capacitive filter and do not require a large 60-Hz transformer, thereby eliminating the heaviest and costliest component of a typical transformer-based power supply. The entire reference design is implemented on a single-sided, double-layer board size of just 63.2 mm x 38.1 mm with a bill-of-material (BOM) count of 20 devices.

  • Solution does not require a custom transformer
  • Optimized, low-cost BOM
  • Input: 110-VAC (85- to 130-VAC), Output voltage: 5-VDC
  • Load current: 500-uA to 30-mA
  • Output ripple of less than 10mV
  • Conducted emissions: CISPR 22, Class B

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.

TIDU856C.PDF (5084 K)

Reference design overview and verified performance test data


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

TIDRDM9.ZIP (1235 K)

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

TIDC993.ZIP (261 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.

Flyback controllers

UCC28880High voltage switcher for Non-isolated AC/DC Conversion

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

Technical documentation

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Type Title Date
* Design guide 110-V AC to 5-V DC at 30-mA Non-Isolated Power Supply Design Guide (Rev. C) Jul. 15, 2015

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