NCP1338DR2G

AC DC Converters, Offline Switchers Overview

The NCP1338DR2G is a discontinued offline switcher from onsemi, designed for flyback converter topologies. It integrates a high-voltage startup circuit and operates with a fixed switching frequency of 130 kHz. The device supports a supply voltage range of 10 V to 20 V, with a startup threshold at 12 V. It is housed in a compact 7-SOIC package and rated for junction temperatures between -40°C and +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates high-voltage startup circuitry for simplified design
• Includes comprehensive fault protection mechanisms
• Optimized for low standby power consumption

AC DC Converters, Offline Switchers Applications

• Offline flyback power supplies
• Adapter and charger designs
• General-purpose AC-DC conversion

AC DC Converters, Offline Switchers Procurement Notes

This component has reached end-of-life status and is no longer manufactured by onsemi. Verification of availability should focus on surplus distributors or secondary market sources rather than direct manufacturer channels. Designers must confirm the authenticity of any available stock due to the discontinued nature of the part.

AC DC Converters, Offline Switchers Selection Notes

Engineers replacing this obsolete component should evaluate the recommended substitute, NCP1342AMDCDAD1R2G. Selection criteria should prioritize compatibility with existing flyback transformer designs and adherence to the original thermal and electrical specifications. A thorough review of the new datasheet is required to ensure pinout and control loop stability match the legacy application.

AC DC Converters, Offline Switchers Part Context

The NCP1338 belongs to onsemi's family of integrated offline switchers aimed at cost-sensitive applications. It combines the controller and driver functions into a single package to reduce external component count. This integration helps minimize board space and simplifies the bill of materials for standard power adapter implementations.

AC DC Converters, Offline Switchers Replacement Considerations

The manufacturer recommends NCP1342AMDCDAD1R2G as the replacement. Verify functional equivalence regarding switching frequency and protection features before adoption.