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首页> 外文会议>2016 COES annual conference proceedings >Variable Slope External Ramp to Improve the Transient Performance in Constant On-Time Current Mode Control
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Variable Slope External Ramp to Improve the Transient Performance in Constant On-Time Current Mode Control

机译：可变斜率外部斜坡可改善恒定导通电流模式控制中的瞬态性能

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摘要

These days, constant on-time current mode (COTCM) control schemes are widely used in the industry VR controllers for its light load efficiency, higher BW design with simpler compensation requirement and better transient performances. In COTCM control, external ramp is required to be added for jittering reduction to improve the noise performance of the controller. But unfortunately, with the increment of external ramp value, although the jittering in the system gets better, transient performance becomes worse. For this reasons, from transient point of view, it is very challenging to use large external ramp in the system to improve the noise performance. In this paper, a novel method is proposed to modify the external ramp at the transient instant to improve the transient response by increasing the slope of the ramp, and thus allows the control to use the large external ramp for noise performance improvement and enjoys the fast transient response at the same time.
机译：如今，恒定导通时间电流模式（COTCM）控制方案因其轻负载效率，更高的带宽设计和更简单的补偿要求以及更好的瞬态性能而在工业VR控制器中得到了广泛使用。在COTCM控制中，需要增加外部斜坡以减少抖动，以改善控制器的噪声性能。但是不幸的是，随着外部斜坡值的增加，尽管系统中的抖动变好了，但瞬态性能却变差了。因此，从瞬态角度来看，在系统中使用较大的外部斜坡来改善噪声性能非常具有挑战性。本文提出了一种新颖的方法，可以在瞬态瞬间修改外部斜坡，以通过增加斜坡的斜率来改善瞬态响应，从而允许控制使用较大的外部斜坡来改善噪声性能并享受快速的性能。同时出现瞬态响应。

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  • 来源
  • 会议地点 Blacksburg VA(US)
  • 作者

    Syed Bari; Qiang Li; Fred C. Lee; Brian Cheng;

  • 作者单位

    Center for Power Electronics SystemsThe Bradley Dept. of Electrical and Computer EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg, VA 24061 USA;

    Center for Power Electronics SystemsThe Bradley Dept. of Electrical and Computer EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg, VA 24061 USA;

    Center for Power Electronics SystemsThe Bradley Dept. of Electrical and Computer EngineeringVirginia Polytechnic Institute and State UniversityBlacksburg, VA 24061 USA;

    Texas Instruments875 Centerville Road, Warwick,RI 02886, USA;

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  • 正文语种 eng
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