LT3579/LT3579-1
APPENDIX
feedback loop.
As with any feedback loop, identifying the gain and phase
contribution of the various elements in the loop is critical.
Figure 18 shows the key equivalent elements of a boost
converter. Because of the fast current control loop, the
power stage of the IC, inductor and diode have been replaced
by a combination of the equivalent transconductance
amplifier gmp and the current controlled current source
(which converts IVIN to
ηVIN
VOUT
IVIN ).
Gmp
acts
as
a
current
–
gmp
+
IVIN
H