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UCC28742DBVR +BOM

Converter Offline Flyback Topology 80kHz SOT-23-6

UCC28742DBVR General Description

The UCC28742DBVR is a compact yet powerful off-line flyback controller designed for AC-to-DC power supplies. With its 6-pin configuration, this controller offers efficient secondary-side regulation for constant voltage output. By utilizing an optical coupler, the UCC28742DBVR ensures quick and accurate response to sudden changes in load demand, making it ideal for a variety of applications

Key Features

  • 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 Over-Voltage
    • Over-Current
    • Short-Circuit
  • SOT23-6 Package
  • Create a Custom Design Using the UCC28742 with the WEBENCH® Power Designer

Specifications

Control mode Secondary-side regulation UVLO thresholds on/off (V) 22/7.7
Duty cycle (max) (%) 99 Switching frequency (max) (kHz) 105
Features Current limiting, DCM, Light load efficiency, Light-load efficiency, Overcurrent protection, Overvoltage protection, SSR, Secondary-side regulated, Soft start, Valley switching Operating temperature range (°C) -40 to 125
Rating Catalog Device type Controllers
Topology Flyback

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