UCC28251

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community UCC28251 SLUSBD8E – FEBRUARY 2013 – REVISED DECEMBER 2014 UCC28251 Advanced PWM Controller With Prebias Operation 1 Features 1 Prebiased Startup Synchronous Rectifier Control Outputs with Programmable Delays (Including Zero Delay Support) Voltage Mode Control with Input Voltage FeedForward or Current Mode Control Primary or Secondary-Side Control 3.3-V, 1.5% Accurate Reference Output Lower Minimum Operating Frequency 1% Accurate Cycle-by-Cycle Over Current Protection with Matched Duty Cycle Outputs Programmable Soft-Start and Hiccup Restart Timer Thermally Enhanced 4-mm x 4-mm VQFN-20 Package and 20-pin TSSOP Package 2 Applications Half-Bridge, Full-Bridge, Interleaved Forward, and Push-Pull Isolated Converters Telecom and Data-com Power Wireless Base Station Power Server Power Industrial Power Systems 3 Description The UCC28251 PWM controller is designed for high power density applications that may have stringent prebiased startup requirements. The UCC28251’s integrated synchronous rectifier control outputs target high efficiency and high performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27210 half bridge drivers and UCC2752x MOSFET drivers used in conjunction with the UCC28251 provide a complete power converter solution. The UCC28251 is a functional variant of the UCC28250 PWM Controller. While the same basi...