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UCC3961 - Advanced Primary-Side Startup Controller

Download the UCC3961 datasheet PDF. This datasheet also covers the UCC2961 variant, as both devices belong to the same advanced primary-side startup controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The UCC3961 advanced primary-side startup controller is a unique solution that provides all the primary-side functions required for a single-ended, isolated, switch-mode power converter incorporating secondary-side PWM control.

Key Features

  • such as output current sharing and synchronous rectification are implemented more easily. The UCC3961 provides all the circuitry required on the primary side of a secondary-side controlled power supply. It features a free running 60-kHz to 360-kHz oscillator which is synchronizable to the secondary-side PWM signal and also has the ability to accept start/stop PWM commands from the isolating pulse-edge transformer (PET). The use of an extremely small and low-cost pulse transformer allows for high.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (UCC2961-Unitrode.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number UCC3961
Manufacturer Unitrode
File Size 281.28 KB
Description Advanced Primary-Side Startup Controller
Datasheet download datasheet UCC3961 Datasheet

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
ą UCC2961, UCC3961 ADVANCED PRIMARYĆSIDE STARTUP CONTROLLER D Operates with Secondary–Side PWM Control D Isolated PWM Command through a Pulse Transformer D Initial Free-Running Soft-Startup with Duty-Cycle Clamping D Up to 400-kHz Synchronizable Switching Frequency D High-Current FET Drive (1.5-A Sink, 0.