Design Support


LiteratureAbstract(literatureAbstract=Transient response is a key performance metric in power converter design which describes how a converter responds to a sudden change in load current. This metric is important to satisfy voltage regulation requirements for dynamic loading conditions and typically requires bulk output capacitance to limit output voltage deviation. Transient response is dependent on the loop response of a converter where the bandwidth and phase margin impacts how quickly the converter responds to a transient event as well as the settling time behavior of the output voltage.

The traditional frequency control method used in LLC converter is difficult to compensate and offers limited bandwidth. An innovative control method, hybrid hysteretic control (HHC), offers superior transient performance by simplifying the LLC power stage into a single pole system which is easier to compensate and achieves a higher bandwidth. This control strategy offers system benefits by minimizing the amount of necessary bulk output capacitance needed to meet a given voltage regulation requirement, allowing for reduced BOM count and smaller solution size.)