Texas Instruments

UCC3960P  

AC DC Converters, Offline Switches

UCC3960P Description

The UCC3960P from Texas Instruments is an offline switch-mode power supply controller designed for AC/DC converter applications. Housed in an 8-pin DIP (Through Hole) package, this IC integrates advanced control features to optimize power conversion efficiency and reliability. With a switching frequency of up to 400kHz, it supports high-performance designs while maintaining robust fault protection, including current limiting and over-voltage protection. The device operates within a supply voltage range of 8V to 19V, with a start-up voltage of 10V, ensuring stable initialization. Though marked as obsolete, it remains a viable choice for legacy systems due to its isolated output and 72% duty cycle capability.

UCC3960P Features

• Frequency Control & Soft Start: Enables smooth power-up and precise switching regulation.
• Fault Protection: Combines current limiting and over-voltage safeguards for enhanced system durability.
• High Switching Frequency: Up to 400kHz allows for compact magnetics and improved power density.
• Wide Supply Range: 8V–19V operation with 10V start-up ensures compatibility with diverse power rails.
• Isolated Output: Supports designs requiring galvanic isolation for safety or noise immunity.
• RoHS3 Compliant: Meets environmental standards despite its obsolete status.

UCC3960P Applications

• Legacy Power Supplies: Ideal for maintaining or repairing older AC/DC converter systems.
• Industrial Controls: Suitable for isolated power stages in machinery with stringent reliability needs.
• LED Drivers: High-frequency operation benefits constant-current LED power modules.
• Consumer Electronics: Auxiliary power circuits in appliances requiring robust fault protection.

Conclusion of UCC3960P

The UCC3960P offers a balanced blend of performance, protection, and flexibility, making it a pragmatic choice for obsolete but critical designs. Its high switching frequency, isolated output, and comprehensive fault protection distinguish it from basic PWM controllers. While newer alternatives exist, the UCC3960P remains relevant for engineers servicing legacy equipment or prioritizing proven reliability in industrial and consumer applications.

UCC3960P Documents

Download datasheets and manufacturer documentation for UCC3960P

Datasheets :

UCC2960D Datasheet      

PCN Obsolescence/ EOL :

Mult Dev EOL 10/Mar/2022       PDIP 16-Mar-2022      

HTML Datasheet :

UCC2960D Datasheet