An examination of the high frequency loop,
shown in Fig 2, reveals parasitic inductances,
Ld(SW),Ls(SW),Ld(SR),Ls(SR), that play a crucial role in
determining the transition time. Thus, the goal of any layout
is to minimize these parasitic inductances so that they play a
minimal role in transition times. Two designs based on a one
switch and two synchronous rectifiers will be investigated.
Design 1 is a 2 layer, 62 mil board with 2-oz copper layers
and with the synchronous rectifiers placed as closely to each
other as possible. Design 2 is a 6-layer, 31 mil board with
2-oz outer copper layers and 1-oz inner layers.
An examination of the high frequency loop,shown in Fig 2, reveals parasitic inductances,Ld(SW),Ls(SW),Ld(SR),Ls(SR), that play a crucial role indetermining the transition time. Thus, the goal of any layoutis to minimize these parasitic inductances so that they play aminimal role in transition times. Two designs based on a oneswitch and two synchronous rectifiers will be investigated.Design 1 is a 2 layer, 62 mil board with 2-oz copper layersand with the synchronous rectifiers placed as closely to eachother as possible. Design 2 is a 6-layer, 31 mil board with2-oz outer copper layers and 1-oz inner layers.
การแปล กรุณารอสักครู่..