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Experimental Identification Method for Small-Signal Analysis of Smart Power ICs

机译：智能功率IC小信号分析的实验识别方法

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摘要

Smart power integrated circuits (ICs), as the combination of control and power functions on a single chip, enable the production of more miniaturized systems. This paper presents an experimental method for the small-signal frequency-response analysis of smart power ICs in switch-mode power supplies. In this method, the switching-duty-cycle output of a power IC is converted into a digital signal by using two high-speed counters during each switching period, and the power IC's control input signal is simultaneously converted into a digital signal by an analog-to-digital converter. After processing the data of the duty-cycle output and the control input, not only the transient response but also the frequency response of the power IC can be obtained. Using least square identification, the smart power IC's transfer function is finally synthesized from the measurement data. This analysis method, referred to as sampling the transient responses and frequency responses of power ICs, can efficiently provide reliable and accurate transfer functions whether the switching frequency of a power IC is jittered or frequency modulated. The experiments using different power ICs were presented herein to validate the analysis method. The results were discussed, and the effectiveness and practicality of the method were verified.
机译：智能功率集成电路（IC）作为控制和功率功能在单个芯片上的结合，可以生产更小型的系统。本文提出了一种用于开关电源中智能电源IC小信号频率响应分析的实验方法。在这种方法中，在每个开关周期期间，通过使用两个高速计数器将功率IC的开关占空比输出转换为数字信号，并且通过模拟将功率IC的控制输入信号同时转换为数字信号。到数字转换器。在处理占空比输出和控制输入的数据之后，不仅可以获得功率IC的瞬态响应，而且可以获得频率响应。通过最小二乘识别，最终根据测量数据合成了智能功率IC的传递函数。这种分析方法称为对功率IC的瞬态响应和频率响应进行采样，无论功率IC的开关频率是抖动的还是频率调制的，都可以有效地提供可靠且准确的传递函数。本文介绍了使用不同功率IC的实验，以验证分析方法。对结果进行了讨论，并验证了该方法的有效性和实用性。

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