UCC3960D

AC DC Converters, Offline Switchers Overview

The UCC3960D is a primary-side startup controller from Texas Instruments designed for single-ended power supply topologies. It integrates essential functions to eliminate the need for secondary-side feedback components, thereby reducing system cost and complexity. The device operates with a switching frequency of 400 kHz and supports a maximum duty cycle of 72%. It provides an output current capability of 1.5 A and is housed in an SOIC-8 surface-mount package. The operational temperature range spans from 0°C to +70°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates primary-side control functions to remove the requirement for optocouplers and error amplifiers
• Provides direct drive capability for external power switches with high peak current output
• Supports standard flyback and forward converter topologies without auxiliary winding regulation

AC DC Converters, Offline Switchers Applications

• Offline flyback power supplies
• Forward converter designs
• Cost-sensitive AC-DC adapter applications

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'D' indicates the SOIC-8 package variant. Confirm RoHS compliance status through the official datasheet as indicated by manufacturer listings. Check for end-of-life notifications or discontinuance alerts prior to final design approval. Ensure ordering quantities align with tube packaging specifications provided by the distributor.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing isolated converters that require simplified feedback loops. It is suitable for applications where minimizing bill-of-materials count is critical. Consider the 400 kHz fixed frequency when sizing magnetic components. Evaluate thermal performance within the specified commercial temperature range during layout planning.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UCC3960 family of primary-side controllers. It serves as a specialized alternative to traditional secondary-side regulated designs. The series focuses on reducing component count in low-to-medium power isolated DC-DC conversion systems.

AC DC Converters, Offline Switchers Replacement Considerations

The UCC3961D is a related variant offering similar functionality but packaged in a SOIC-14 format. Verify pin compatibility and thermal requirements before substituting between these package types.