eem2am
Banned
Hello,
Please may I first state:
CCM = continuous conduction mode
DCM = discontinuous conduction mode
do you believe some points made in "Puzzler 3" on the powerint.com website are incorrect or incomplete or at least biased unfairly in favour of CCM?
Puzzler 3:-
**broken link removed**
For example in question 1, it mentions only RMS losses, ......this might be the main point in USA mains (110VAC) but in UK mains (230VAC) the switching losses are significant, and CCM is more inefficient than DCM due to CCM's higher switching losses with UK mains levels.(?)
Also, "Answer 3" of "Puzzler 3" states.........
"Continuous mode operation gives higher loop gain and therefore has faster transient response than discontinuous mode"
do you agree that this is completely wrong?
"Answer 3" of "Puzzler 3" also states, when referring to CCM:-
"Lower peak currents also lead to better differential mode conducted (and radiated) EMI performance (or smaller input capacitors). "
...This might be so , but EMI is just as bad in CCM as DCM......its just that the spectrum of noise is higher in CCM.
Do you agree that this “Puzzler 3 “ is inaccurate and in other places, incorrect?
Please may I first state:
CCM = continuous conduction mode
DCM = discontinuous conduction mode
do you believe some points made in "Puzzler 3" on the powerint.com website are incorrect or incomplete or at least biased unfairly in favour of CCM?
Puzzler 3:-
**broken link removed**
For example in question 1, it mentions only RMS losses, ......this might be the main point in USA mains (110VAC) but in UK mains (230VAC) the switching losses are significant, and CCM is more inefficient than DCM due to CCM's higher switching losses with UK mains levels.(?)
Also, "Answer 3" of "Puzzler 3" states.........
"Continuous mode operation gives higher loop gain and therefore has faster transient response than discontinuous mode"
do you agree that this is completely wrong?
"Answer 3" of "Puzzler 3" also states, when referring to CCM:-
"Lower peak currents also lead to better differential mode conducted (and radiated) EMI performance (or smaller input capacitors). "
...This might be so , but EMI is just as bad in CCM as DCM......its just that the spectrum of noise is higher in CCM.
Do you agree that this “Puzzler 3 “ is inaccurate and in other places, incorrect?