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单管正激变换器可有效替代(大电流输出,功率范围100~300W)隔离、离线降压式的单管反激变换器。与反激变换器不同的是,在正向变换器中,能量可以立刻转移到变压器,且不依赖于变压器进行能量储存。变压器因此具有更高的磁化电感且无气隙,能够提高变压器利用率。然后对变压器的次级输出进行L-C滤波,以确保减小输出电压波纹的同时降低功率管上的峰值电流,从而降低应力。

另一方面,与反激式拓扑相比,变压器必须在若干周期后重置,以避免饱和。在这种情况下,初级需要一个更高耐压的MOSFET、一个额外的输出电感和一个续流二极管。

我们提供完整的初级侧PWM和同步整流控制器、功率MOSFET和二极管、以及一系列硬件和软件评估与开发工具(包括参考设计),可帮助开发人员设计尺寸优化的高效率正激变换器。

00 选择要下载的文档

技术文档

    • 描述 版本 文档大小 操作
      AN1768
      ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES
      1.1
      46.82 KB
      PDF
      AN2025
      CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION
      1.1
      147.59 KB
      PDF
      AN604
      Calculation of conduction losses in a power rectifier
      3.2
      137.74 KB
      PDF
      AN4021
      Calculation of reverse losses in a power diode
      1.0
      120.47 KB
      PDF
      AN2623
      Evaluation board for off-line forward converter based on L5991
      1.2
      1.24 MB
      PDF
      AN4829
      Fishbone diagrams for a forward converter
      1.1
      1.35 MB
      PDF
      AN1453
      NEW FAMILY OF 150V POWER SCHOTTKY
      1.1
      131.48 KB
      PDF
      AN5046
      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages
      4.0
      4.82 MB
      PDF
      AN5088
      Rectifiers thermal management, handling and mounting recommendations
      2.0
      2.32 MB
      PDF
      AN443
      SERIES OPERATION ON FAST RECTIFIERS
      2.1
      202.48 KB
      PDF
      AN869
      Tj max limit of Schottky diodes
      2.2
      60.9 KB
      PDF
      AN1768

      ADMISSIBLE AVALANCHE POWER OF SCHOTTKY DIODES

      AN2025

      CONVERTER IMPROVEMENT USING SCHOTTKY RECTIFIER AVALANCHE SPECIFICATION

      AN604

      Calculation of conduction losses in a power rectifier

      AN4021

      Calculation of reverse losses in a power diode

      AN2623

      Evaluation board for off-line forward converter based on L5991

      AN4829

      Fishbone diagrams for a forward converter

      AN1453

      NEW FAMILY OF 150V POWER SCHOTTKY

      AN5046

      Printed circuit board assembly recommendations for STMicroelectronics PowerFLAT packages

      AN5088

      Rectifiers thermal management, handling and mounting recommendations

      AN443

      SERIES OPERATION ON FAST RECTIFIERS

      AN869

      Tj max limit of Schottky diodes

Presentations & Training Material

    • 描述 版本 文档大小 操作
      Primary side regulation controllers portfolio
      1.1 MB
      PDF

      Primary side regulation controllers portfolio

出版刊物和宣传资料

    • 描述 版本 文档大小 操作
      800-1050V MDmesh™ K5 ST’s first super-junction VHV MOSFET Series 1.0
      516.44 KB
      PDF
      Field-Effect Rectifier Diodes Advantageously replace Schottky (60V and 100V) 1.0
      975.08 KB
      PDF
      ST Diodes Finder : the new app for Android and iOS 2.0
      1.46 MB
      PDF

      800-1050V MDmesh™ K5 ST’s first super-junction VHV MOSFET Series

      Field-Effect Rectifier Diodes Advantageously replace Schottky (60V and 100V)

      ST Diodes Finder : the new app for Android and iOS

    • 描述 版本 文档大小 操作
      Diodes and rectifiers selection guide 2.0
      815.09 KB
      PDF

      Diodes and rectifiers selection guide

eDesignSuite

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