Compensation Free Voltage Regulators： The Continuing Evolution of Digital Compensation

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　　電壓調(diào)節(jié)器的反饋與補償

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　　傳統(tǒng)的電源和電壓調(diào)節(jié)器能夠產(chǎn)生穩(wěn)定的輸出電壓，由于納入控制回路負(fù)反饋。正確實施負(fù)反饋的一個主要挑戰(zhàn)是提供正確的頻率補償與反饋網(wǎng)絡(luò)。電壓調(diào)節(jié)器的初始實現(xiàn)采用控制和反饋電路的模擬電路。后來技術(shù)的改進(jìn)使得數(shù)字電路能夠取代電壓調(diào)節(jié)器和電源中幾乎所有的模擬功能。數(shù)字電路的加入允許自動補償算法的發(fā)展，以減輕電力設(shè)計工程師的負(fù)擔(dān)。自動補償是一個很大的改善，比傳統(tǒng)的拓?fù)浣Y(jié)構(gòu)，但仍然有一定的局限性，由于電路的要求，以確定補償參數(shù)。數(shù)字電壓調(diào)節(jié)器控制器最近的發(fā)展創(chuàng)造了“無補償”的拓?fù)浣Y(jié)構(gòu)。這些無補償?shù)脑O(shè)計提供了優(yōu)越的電壓調(diào)節(jié)，同時消除了與確定補償參數(shù)相關(guān)的問題。

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　　Analog voltage regulators

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　　Analog voltage regulators require the design engineer to determine the values for compensation resistors and capacitors and then to solder these components onto the PCB. The selection， placement and modification of the discrete compensation components add delays and risks to power delivery designs. Some vendors simplify the compensation component selection process by allowing the user to select a single resistor and a single capacitor to compensate the regulator. While this option simplifies the user tasks， it reduces the probability that the resulting load current transient behavior of the power supply is acceptable. The design and implementation of analog voltage regulators is a manually-intensive process and thus carries undesirable risks and costs.

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