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UCC28250-具有预偏置操作的高级 PWM 控制器
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TI产品 - UCC28250介绍

UCC28250 - 具有预偏置操作的高级 PWM 控制器

UCC28250是TI德州仪器公司的一款PWM与谐振控制器产品，UCC28250是具有预偏置操作的高级 PWM 控制器，本站介绍了UCC28250的封装应用图解、特点和优点、功能等，并给出了与UCC28250相关的TI元器件型号供参考。

UCC28250 - 具有预偏置操作的高级 PWM 控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The UCC28250 PWM controller is designed for high power density applications that may have stringent pre-biased startup requirements. The UCC28250’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 UCC27200 half bridge drivers and UCC2732X MOSFET drivers used in conjunction with the UCC28250 provide a complete power converter solution.

Externally programmable soft-start, used in conjunction with an internal pre-biased startup circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28250 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.

The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input voltage feedforward, cycle-by-cycle current limit, and a programmable hiccup timer allow the system to stay within a safe operation range. Input voltage, output voltage and temperature protection can be implemented. Dead time between primary-side switch and secondary-side synchronous rectifiers can be independently programmed.

产品特性

  • Pre-biased Startup
  • Synchronous Rectifier Control Outputs with Programmable Delays (Including Zero Delay Support)
  • Voltage Mode Control with Input Voltage Feed-Forward or Current Mode Control
  • Primary or Secondary-Side Control
  • 3.3-V, 1.5% Accurate Reference Output
  • 1-MHz Capable Switching 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 QFN-20 Package and 20-pin TSSOP Package
  • 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

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