STMicroelectronics A 200 W ripple-free input current PFC pre-regulator with the L6563S EVL6563S-200ZRC EVL6563S-200ZRC 数据表
产品代码
EVL6563S-200ZRC
Sensitivity of zero-ripple current condition
AN3180
12/39
Doc ID 17273 Rev 1
Figure 7.
Ripple-current attenuation as a function of the error sources for various
winding coupling
winding coupling
5.
A resonance frequency, close to:
Equation 12
for small zero-ripple condition mismatches, exists where the gain peaks and attenuation
may be lost. However, the parasitic resistances damp this peak so that it is not high, even
though its effect might be visible in the waveforms, should that frequency be stimulated;
anyhow, to get the desired attenuation at the switching frequency and above, the practical
values of C
may be lost. However, the parasitic resistances damp this peak so that it is not high, even
though its effect might be visible in the waveforms, should that frequency be stimulated;
anyhow, to get the desired attenuation at the switching frequency and above, the practical
values of C
S
are such that the peak occurs at a much lower frequency, where EMC
regulations do not generally apply.
!-V
N
N
N
N
G>@
$>G%@
Y
N
N
N
N
G >@
$>G%@
Y
N
N
N
N
$>G%@
Y
G>@
N
N
N
N
G >@
$>G%@
Y
S
1
r
C
L
2
1
f
π
=