CMOS求和比較器在PWM開關(guān)電源控制中的應(yīng)用

摘要：文章介紹了一種用CMOS求和比較器代替?zhèn)鹘y(tǒng)的PWM電流控制電路中的誤差放大器的開關(guān)電源控制技術(shù)，該技術(shù)可以使原來復(fù)雜的、缺乏自適應(yīng)能力的系統(tǒng)變得簡潔，并且降低了成本，有利于系統(tǒng)集成。 敘詞：求和比較器 PWM控制 開關(guān)電源 Abstract：This paper introduces a kind of control technology used in SMPS which takes advantage of a CMOS sum-comparator to substitute the traditional error amplifier applied in current-mode PWM control circuit.This technology makes the system which is complicated and lacks of self-adaptive capacity brief and lowers the cost,so it is easy to be integrated. Keyword：sum-comparator PWM control SMPS