UCC28742 High-Efficiency Flyback Controller with Optocoupler Feedback

1 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

2 Applications

• Industrial and Medical AC-to-DC Power Supplies
• Smart Electricity Meters
• Bias Supply for UPS, Server PSU, etc.
• Power Supply for Cable Modem, Television, Set-Top Box, and Wireless Routers
• AC-to-DC Power Supply for Appliances