自適應導通時間降壓電路的虛擬ESR環路設計

摘要：由于陶瓷電容極小的ESR的原因，自適應導通時間降壓電路在輸出全陶瓷電容的情況下，輸出電壓無法提供足夠的同電感電流相位的紋波電壓做反饋使用，只能靠虛擬ESR電路提供足夠的紋波來做反饋使用，并保證電路的正確工作。本文介紹了一種虛擬ESR電路的設計方式。
敘詞：自適應導通時間 陶瓷電容 虛擬ESR電路 Abstract： Output voltage cant provide enough ripple voltage that in phase with inductor current to stable the circuit in the all ceramic output capacitor application of adaptive on time buck circuit due to the very small ESR of ceramic capacitors . Virtual ESR circuit provides a solution to this application that can generate enough in phase ripple to stable the AOT buck circuit . This article provides a virtual ESR circuit design method .Keywords: Adaptive on time, Ceramic capacitors , Virtual ESR circuit .