ON Semiconductor NCP1342 is a highly integrated quasi-resonant flyback controller

ON Semiconductor NCP1342 is a highly integrated quasi-resonant flyback controller

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The NCP1342 is a highly integrated quasi-resonant flyback controller suitable for designing high-performance off-line power converters

The NCP1342 is a highly integrated quasi-resonant flyback controller suitable for designing high-performance off-line power converters. The integrated X2 capacitor-discharge feature enables the NCP1342 to achieve no-load power consumption below 30 mW.

The controller features proprietary valley-lockout circuitry, ensuring stable valley switching, and includes key protection features for AC-DC power supply applications.

Key features

  • QR frequency jittering for optimized EMI behavior
  • Quiet-Skip technology to ensure operation outside the audible range
  • Frequency foldback with 25 kHz min frequency clamp for the highest light load efficiency
  • Integrated HV Startup with brownout protection

Additional features

  • Valley switching operation with valley lockout
  • Integrated X2 capacitor-discharge capability
  • NTC-compatible fault pin
  • High drive capability: -500 mA/+800 mA
  • Latch input for OVP and OTP implementation

Applications

  • Medium or high power AC-DC adapters
  • Ultra-high-density AC-DC adapters
  • Low/medium power USB PD adapters
  • Notebook computer adapters

more information: https://www.onsemi.com/ncp1342

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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