buck-boost topology by using LNK364
Posted by: phd.nash
on
is it possible to design a buck-boost topology by using LNK364 and 600uH inductance?
评论
If you want to use a buck-boots topology, I suggest use a link TN family and Power Integrations document AN-37 to assist you in your design. If there is a particular reason you need to use LNK364 and 600 uH please let us know.
we want to know the performance of LNK364 with the buck-boost and buck topology. 132khz a problem for a buck-boost design. acquiring target power seems impossible. how can we handle this problem with lnk364
The LNK364 is regularly used in the Flyback topology which is basically an isolated buck boost. So from a topological standpoint there is no reason why you cannot use the LNK364 in buck-boost. You only have to pay attention to the minimum on time and select the inductor value such that the on calculated time at maximum input voltage is higher than this minimum on time
The minimum on time is the sum of the leading edge blanking time and the current limit delay time. For LNK363 this works out to be 375 ns
