24V/12W Off-Line DCM Flyback Converter Optimized for Zero-Power at No-Load PMP10927 (ACTIVE)

Description & Features

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Description

This design features the UCC28730 flyback controller in conjunction with the UCC24650 Wake-Up monitor to provide CV, CC regulated output with ultra-low stand-by power that exceeds Level VI and CoC Tier 2 specifications for average efficiency and 10% load efficiency.  Wake-up signal detection provides fast transient response to large load steps.

As seen at APEC

Features
  • No-Load Stand-By Power Consumption less than 5 mW (“Zero-Power”)
  • Wake-Up Detection for Fast Dynamic Response
  • Primary Side Regulation Eliminates Opto-Coupler
  • Average Efficiency and 10% efficiency exceeds Level VI and CoC Tier 2 specifications, effective 2016
  • Resonant Ring Valley Switching Operation for Highest Overall Efficiency
  • This circuit design includes tested data for efficiency and transient response along with key waveforms.

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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
UCC24650  200-V Wake-up Monitor for Fast Transient Primary-side Regulation  Offline & isolated DC/DC controllers & converters  Sample & Buy View Design Kits & Evaluation Modules
UCC28730  Zero Standby PSR Flyback Controller with CVCC and Wake-Up Monitoring  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)
UCC24650 Download Download
UCC28730 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1011 25 Feb 2015
Design files (5)
Title Type Size (KB) Date
ZIP 200 25 Feb 2015
PDF 284 25 Feb 2015
PDF 146 25 Feb 2015
PDF 50 25 Feb 2015
PDF 29 25 Feb 2015

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