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


The 110-VAC to 5-VDC @ 30-mA Non-Isolated Power Supply TI Design uses a low-power, low-cost, off-line buck converter and a low-noise, low-dropout voltage regulator to generate a non-isolated 5V/30mA output directly from a 110-VAC line input with under 10-mV outpur 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 TI design is implemented on a single-sided, double-layer board size of just 63.2 x 38.1 mm with a build-of-materials (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

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Schematic/Block Diagram

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Design Files

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TI Devices (1)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC28880  High voltage switcher for Non-isolated AC/DC Conversion  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
UCC28880 Download Download

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Technical documentation

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User guides (1)
Title Type Size (KB) Date
PDF 5084 15 Jul 2015
Design files (6)
Title Type Size (KB) Date
ZIP 261 24 Mar 2015
ZIP 1235 24 Mar 2015
PDF 433 24 Mar 2015
PDF 112 24 Mar 2015
PDF 77 24 Mar 2015
PDF 315 24 Mar 2015

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