1.5.2
Power stage
1.5.2.1
Boost inductor
Boost inductors are part of the LCL-R AC side filter. They allow obtaining the converter PFC operation by
controlling the inductor current using a proper conduction pattern in the power device section.
Continuous conduction mode (CCM) performs the PFC operation of this reference design. The inductance value
is related to several parameters: the current ripple, the available converter voltage levels, the switching frequency,
and the rated DC-AC operation voltages.
Table 3.
Boost inductor parameters
Parameter
Symbol
Value
DC voltage (V)
V
0
800
Switching frequency (kHz)
fsw
70
Rated AC voltage (V
RMS
)
V
AC
230
Max. ripple current (%)
Δ
iLppmax
10
Boost inductance (H)
L
470e-6
1.5.2.2
Inrush current limiter
Figure 7.
Three and four-wire connections
Figure 8.
Passive NTC
UM2979
Reference design description
UM2979
-
Rev 1
page 6/70
