UCC28950 Green Phase-Shifted Controller

Texas Instruments' green phase-shifted, full-bridge controller with synchronous rectification

Texas Instruments UCC28950 Green Phase-Shifted Controller Texas Instruments' UCC28950 enhanced, phase-shifted controller builds upon Texas Instruments' industry standard UCCx895 phase-shifted controller family with enhancements that offer best in class efficiency in today’s high performance power systems. The UCC28950 implements advanced control of the full-bridge along with active control of the synchronous rectifier output stage.

The primary-side signals allow programmable delays to ensure ZVS operation over wide-load current and input voltage range, while the load current naturally tunes the secondary-side synchronous rectifiers switching delays, maximizing overall system efficiency. The UCC28950 also offers multiple light-load management features including burst mode and dynamic SR on/off control when transitioning in and out of Discontinuous Current Mode (DCM) operation, ensuring ZVS operation is extended down to much lighter loads.   UCC28950 Datasheet

  Features   Applications
  • Enhanced wide range resonant zero voltage switching (ZVS) capability
  • Direct synchronous rectifier (SR) control
  • Light-load efficiency management including
    • Burst mode operation
    • Discontinuous conduction mode (DCM), dynamic SR On/Off control with programmable threshold
    • Programmable adaptive delay
  • Average or peak current mode control with programmable slope compensation and voltage mode control
  • Closed loop soft start and enable function
  • Programmable switching frequency up to 1 MHz with bi-directional synchronization
  • (+/-3%) cycle-by-cycle current limit protection with hiccup mode support
  • 150 µA start-up current
  • VDD under voltage lockout
  • Phase-shifted full-bridge converters
  • Server
  • Telecom power supplies
  • Industrial power systems
  • High-density power architectures
  • Solar inverters
  • Electric vehicles

Buy Now
Texas Instruments
Part Number
Part Number
Packaging Description Package  
UCC28950PWR 296-25884-2-ND Tape & Reel Green Phase-Shifted Full-Bridge Controller with Synchronous Rectification 24-TSSOP
(0.173", 4.40mm Width)
UCC28950 Datasheet
296-25884-1-ND Cut Tape
296-25884-6-ND Digi-Reel

Evaluation Module
Texas Instruments
Part Number
Part Number
UCC28950EVM-442 296-28920-ND Evaluation Module for UCC28950-442 UCC28950EVM-442 User's Guide

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