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


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



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