NCP1342DADBDD1R2G

AC DC Converters, Offline Switchers Overview

The NCP1342DADBDD1R2G is a highly integrated quasi-resonant flyback controller designed for high-performance offline power converters. It operates with a switching frequency of 500kHz and utilizes a 9-SOIC package. The device supports a supply voltage range of 9V to 28V, with a startup voltage of 17V. It features an internal valley lock-out circuit for stable valley switching and includes comprehensive protection mechanisms such as over-current, over-voltage, and thermal shutdown. The component is RoHS compliant and suitable for applications requiring low no-load power consumption.

AC DC Converters, Offline Switchers Feature Summary

• Integrates active X2 capacitor discharge capability to achieve ultra-low no-load power consumption below 30 mW.
• Features proprietary valley lock-out switching technology to ensure stable operation and minimize acoustic noise.
• Includes fast frequency foldback and minimum peak current modulation for optimized light-load efficiency.
• Provides robust protection functions including non-dissipative over-power protection (OPP) and NTC-compatible over-temperature protection.

AC DC Converters, Offline Switchers Applications

• High-density AC-DC adapters
• USB PD compliant chargers
• Notebook power adapters
• Flat panel TV SMPS

AC DC Converters, Offline Switchers Procurement Notes

Verify the complete part number against official onsemi documentation to confirm specific suffix designations. Ensure compatibility with required packaging formats such as tape and reel. Confirm that the selected variant meets all necessary regulatory standards for the target application region. Cross-reference datasheet revisions to validate feature sets before procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this controller for designs requiring high efficiency across varying load conditions. Consider its wide Vcc operating range and integrated high-voltage startup for simplified bias winding requirements. Evaluate the need for its specific protection features against system safety requirements. Ensure the chosen package aligns with PCB layout constraints and thermal management strategies.

AC DC Converters, Offline Switchers Part Context

This component belongs to the NCP1342 family of quasi-resonant flyback controllers from onsemi. It is engineered to replace older fixed-frequency controllers by offering improved efficiency through resonant switching techniques. The series is widely used in modern power supply designs aiming for strict energy efficiency regulations.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for compatible alternatives within the same product family. Verify pinout compatibility and electrical parameter overlaps before replacing existing designs. Ensure that any substitute maintains the required isolation and protection functionalities.