CONVERTER CIRCUIT, CORRESPONDING APPARATUS AND CONTROL METHOD

摘要

A boost-type converter circuit includes a pair of converter switches that are alternatively switchable on and off. An inductor is coupled to the intermediate point between the converter switches. A driver module controls switching on and off of the converter switches in respond to a comparator output signal. A reference signal line provides to the comparator a reference signal, and an output feedback line provides to the comparator an output feedback signal. These signals are compared to each other to generate the comparator output signal for controlling the driver module. A low-pass filter network is coupled to the inductor and configured to provide a ripple current which is a low-pass filtered replica of the current through the inductor. An injector circuit injects the ripple current into the reference signal line coupled to the comparator.

主权项

1. A converter circuit, comprising:
a pair of converter switches alternatively switchable on and off, said pair of converter switches having an intermediate point therebetween, an inductor coupled to the intermediate point between the converter switches of said pair of converter switches, a driver module configured to switch on and off said pair of converter switches in response to an output signal from a comparator, a reference signal line configured to provide to said comparator a reference signal, an output feedback line configured to provide to said comparator an output feedback signal for comparison with said reference signal, wherein said comparator is configured to control said driver module with said output signal as a function of the comparison of said output feedback signal with said reference signal, a low-pass filter network coupled to said inductor and configured to provide a ripple current which is a low-pass filtered replica of a current through said inductor, and an injector circuit configured to inject said ripple current into said reference signal line.