bhl777
Full Member level 6
Hi All,
Do we always have the low frequency right half plane zero at boost and buck-boost conveter?
More specifically, the existance of RHPZ seems to be related to CCM/DCM and also the control mode. Can any one clearify the following questions?
(1) can I say RHPZ only exists in CCM, but not DCM? Intuitively, it seems like DCM always has a tri-state time interval, which can be used as the OFF time when necessary during the load transient.
(2) does RHPZ also exist when we have variable frequency mode control? For example, contant off time control has been used in Boost and buck-boost. There is a similar question asked in this forum but no conclusive answer was posted there.
https://www.edaboard.com/showthread.php?304551-Constant-off-time-boost-converter-has-no-Right-Half-Plane-Zero
Thank you!
Do we always have the low frequency right half plane zero at boost and buck-boost conveter?
More specifically, the existance of RHPZ seems to be related to CCM/DCM and also the control mode. Can any one clearify the following questions?
(1) can I say RHPZ only exists in CCM, but not DCM? Intuitively, it seems like DCM always has a tri-state time interval, which can be used as the OFF time when necessary during the load transient.
(2) does RHPZ also exist when we have variable frequency mode control? For example, contant off time control has been used in Boost and buck-boost. There is a similar question asked in this forum but no conclusive answer was posted there.
https://www.edaboard.com/showthread.php?304551-Constant-off-time-boost-converter-has-no-Right-Half-Plane-Zero
Thank you!