TIDA-00628 Reference Design

Texas Instruments

Snubberless: Non-Isolated AC/DC Flyback Converter Reference Design with Simplified Transformer


TIDA-00628 is a 15V/6.5W non-isolated: single output: AC/DC Flyback power supply that is capable of operating from wide input voltage ranging from 85Vac to 440Vac. This design demonstrates 2 key features (1) the elimination of snubber components enabled by use of a high-voltage bipolar transistor and (2) simplified transformer design with no need for an auxilliary winding.  Low system parts count and built in advanced protection features result in a cost-effective solution for electricity meters and industrial designs.

  • Input voltage up to 440Vrms: 15V/6.5W outputNo snubber - reduces BoM count and PCB areaBJT switch to reduce system costNon Isolated output allows simplified transformer with no auxilliary windingTypical efficiency of 80% at 230V: 6.5WCompliant with Conducted Emissions: CISPR 22: Class B
  • Electricity meter
  • AC-input BLDC motor drive
  • Process Analytics (pH
  • Gas
  • Concentration
  • Force & Humidity)
  • Data concentrators
  • Power quality analyzer
  • Circuit breaker (ACB
  • MCCB
  • VCB)
  • Power quality meter
Product Categories
  • Power management


Part Number Name Companion Part
UCC28722 UCC28722 Buy Datasheet

Bill Of Materials

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Quickly understand overall system functionality.

Download the schematic for TIDA-00628

Other Documents

Title Updated Type Size (KB)
TIDA-00628 Gerber 21 Sep 2015 ZIP 447
TIDA-00628 CAD Files 21 Sep 2015 ZIP 953
TIDA-00628 PCB 21 Sep 2015 PDF 4281
TIDA-00628 Assembly Drawing 21 Sep 2015 PDF 108
TIDA-00628 BOM 21 Sep 2015 PDF 40
TIDA-00628 Schematic 21 Sep 2015 PDF 321