|
发表于 2014-7-25 10:45:15
|
显示全部楼层
This section will briefly review some existing light-load efficiency boosting tech-
niques. From the analysis in Sect. 4.1, each term on the right hand side of (4.1)
demonstrates a different degree of dependence on the output power Iout. Among
them, Psw and PQ can be a weak function of Iout. As Iout decreases, Psw and PQ do
not scale back proportionally, if at all. Therefore, there are two main approaches to
boost light-load efficiency: reducing Psw and reducing PQ as Iout diminishes.
From the analysis in Sect. 4.1, all three components of the switching loss Psw are
proportional to the switching frequency fs. If we write Psw as |
|