On the maximum regulation range in boost and buck-boost converters

Abstract

In boost and buck-boost converters, an unstable phenomenon occurs and the output voltage oscillates when the feedback gain is high and the load becomes heavy. On the other hand, even when the feedback gain is relatively low, another instability arises under some conditions of load resistance, and then the dc output voltage jumps down to an extremely low level. This paper describes the generalized approach to the instability in boost and buck-boost converters, and discusses the maximum regulation range for the load resistance.