Unitrode IC Corporation has, since its inception,been active in the development of leading-edge control circuits to implement state-of-the-art progressions in power supply technology. Over the years many new products have been introduced to allow designers to readily apply new innovations in circuit topologies. Since each of these new topologies purports to offer improvements over that which
was previously available, it is reasonable to expect some confusion to be generated with the introduction of the UCC3570 - a new voltage-mode controller introduced almost 10 years after we told the world that current-mode was such a superior approach.