SLYT800B december 2020 – december 2020 LM25180 , LM25183 , LM25184 , LM5180 , LM5181
The proper selection of components for a flyback converter requires an understanding of mode behaviors and operating characteristics. This article examined the output capacitance requirement for a PSR flyback DC/DC converter as it pertains to peak-to-peak output ripple and small-signal stability. The worst case for output ripple is at a minimum input voltage and full load, which normally corresponds to operation in BCM. Distinctly, the capacitance requirement for loop stability occurs at a high input voltage and full load when operating in DCM.