NCP1342ANACED1R2G

AC DC Converters, Offline Switchers Overview

The NCP1342ANACED1R2G is a highly integrated quasi-resonant flyback controller designed for high-performance offline power converters. It features an integrated active X2 capacitor discharge function, enabling no-load power consumption below 30 mW. The device incorporates a dedicated valley lock-out circuit to ensure stable valley switching, operating down to the sixth valley before transitioning to frequency foldback mode to reduce switching losses. At lighter loads, it employs skip mode to manage power transfer while minimizing audible noise.

AC DC Converters, Offline Switchers Feature Summary

• Integrated active X2 capacitor discharge capability for safe line removal and ultra-low no-load power consumption
• Dedicated valley lock-out circuit ensuring stable valley switching with transition to frequency foldback at light loads
• Minimum Peak Current Modulation (MPCM) combined with QR frequency jitter for optimized high-frequency design performance
• Comprehensive protection suite including internal UVLO, non-dissipative over-power protection (OPP), latch OVP/OTP, and line removal detection

AC DC Converters, Offline Switchers Applications

• Medium or high power AC-DC adapters
• Ultra-high density AC-DC adapters
• USB PD standard compliant chargers
• Notebook adapters
• Flat panel TV SMPS

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'ANACED1R2G' against the official onsemi datasheet to confirm pinout and electrical characteristics match your design requirements. Ensure the SOIC-9 package dimensions align with your PCB footprint. Confirm RoHS compliance status through the manufacturer's current product compliance documentation prior to finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring efficient quasi-resonant operation with minimal standby power. The integrated X2 discharge simplifies safety certification by eliminating external discharge resistors. Consider the valley lock-out feature for applications demanding low electromagnetic interference (EMI) through reduced switching noise. Evaluate the OPP implementation if constant maximum output power is critical across varying input voltage conditions.

AC DC Converters, Offline Switchers Part Context

This part belongs to the NCP1342 series of quasi-resonant flyback controllers from onsemi. The series is engineered for offline AC-DC conversion, offering high integration to reduce external component count. It targets applications where efficiency, low no-load power, and acoustic noise reduction are primary design constraints.

AC DC Converters, Offline Switchers Replacement Considerations

Consult the onsemi NCP1342 family datasheet for direct pin-compatible alternatives such as NCP1342AMDCDAD1R2G or NCP1342ENDCEAD1R2G. Verify that any substitute maintains the same SOIC-9 package and electrical specifications before implementation.