UCC28780: The issues of the switching frequency in different modes

1: When UCC28780 works in AAM mode, what are the limiting factors for its lowest switching frequency？

2: When UCC28780 works in LPM mode, why can the switching frequency be lower? And What are the factors that determine the lowest frequency？

Johnsin Tao：

HI

   见datasheet 第23页，分模式总体还是因为负载的大小，目的还是为了提高效率。