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首页> 外文会议>Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition >I2 average current mode control for switching converters
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I2 average current mode control for switching converters

机译：I 2 开关转换器的平均电流模式控制

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摘要

The constant frequency average current mode control is a widely used control scheme for the converters requiring precise current control, but its transient response is relatively slow, while the switching loss and driving loss significantly diminish the light load efficiency. To solve these issues, the I2 control average current mode is proposed. By combining the fast direct current feedback and integral feedback, the I2 control achieves both wide bandwidth and accurate current control. As a particular embodiment of this concept, by adopting constant on-time modulation, constant on-time I2 control needs no artificial ramp, and has fast dynamic response. Moreover, due to the decrease of switching frequency, constant on-time I2 control improves the efficiency in discontinuous-conduction-mode. The concept of I2 control can be extended to other modulations. Small signal model using describing function based equivalent circuit model is proposed. The model is accurate up to 1/2 switching frequency. Based on model, the design guidelines are discussed. The proposed control is verified with simulation and hardware measurement results.
机译：恒定频率平均电流模式控制是需要精确电流控制的转换器的一种广泛使用的控制方案，但是其瞬态响应相对较慢，而开关损耗和驱动损耗却大大降低了轻载效率。为了解决这些问题，提出了I 2 控制平均电流模式。通过组合快速直流反馈和积分反馈，I 2 控制可实现宽带宽和精确的电流控制。作为该概念的特定实施例，通过采用恒定的导通时间调制，恒定的导通时间I 2 控制不需要人工斜坡，并且具有快速的动态响应。此外，由于开关频率的降低，恒定导通时间I 2 控制可提高不连续导通模式下的效率。 I 2 控制的概念可以扩展到其他调制方式。提出了一种基于描述函数的等效电路模型小信号模型。该模型在高达1/2的开关频率下都是准确的。基于模型，讨论了设计准则。仿真和硬件测量结果验证了所提出的控制。

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