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UCC28742 - High-Efficiency Flyback Controller

General Description

The UCC28742 off-line flyback controller is a highly integrated, 6-pin secondary-side regulated PWM controller for efficient AC-to-DC power supplies.

Key Features

  • 1 Opto-Coupled Feedback Enables up to 1% Regulation.
  • Accurate Current Limit with Overload Timeout Protection and Delayed Hiccup Response.
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency.
  • 80-kHz Maximum Switching Frequency.
  • Frequency Dithering to Ease EMI Compliance.
  • Clamped Gate-Drive Output for MOSFET.
  • Ultra-Low Start-Up Current and Large VDD Hysteresis.
  • High Value Start-Up Resistor.
  • Low Bia.

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Full PDF Text Transcription for UCC28742 (Reference)

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Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design UCC28742 SLUSD71A – APRIL 2018 – REVISED MAY 2018 UCC28742 High-Efficie...

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CC28742 SLUSD71A – APRIL 2018 – REVISED MAY 2018 UCC28742 High-Efficiency Flyback Controller with Optocoupler Feedback + Efficiency 1 Features •1 Opto-Coupled Feedback Enables up to 1% Regulation • Accurate Current Limit with Overload Timeout Protection and Delayed Hiccup Response • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency • 80-kHz Maximum Switching Frequency • Frequency Dithering to Ease EMI Compliance • Clamped Gate-Drive Output for MOSFET • Ultra-Low Start-Up Current and Large VDD Hysteresis – High Value Start-Up Resistor – Low Bias Capacitance • Fault Protections – Input Low Line – Output

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