EFFICIENT BOOST-BUCK CONVERTER AND CONTROL METHOD THEREOF

摘要

In one embodiment, a boost-buck converter can include: (i) first and second switches coupled in series between input and an output of the boost-buck converter; (ii) a first inductor coupled to the input and third and fourth switches, where the third switch is coupled to ground, and the fourth switch is coupled to the output; (iii) a second inductor coupled to the output and a common node of the first and second switches; and (iv) a control circuit configured to control switching of the first, second, third, and fourth switches according to the input and output voltages, such that the boost-buck converter operates in at least one of: a buck mode and a boost mode.

主权项

1. A method of controlling a boost-buck converter, the method comprising:
a) receiving a voltage from an input of said boost-buck converter; b) receiving a voltage from an output of said boost-buck converter; c) controlling switching of first, second, third, and fourth switches according to said input and output voltages such that said boost-buck converter operates in at least one of: a buck mode and a boost mode; and d) wherein said boost-buck converter comprises said first and second switches coupled in series between said input and ground, a first inductor coupled to said input, said third switch coupled between said first inductor and ground, said fourth switch coupled between said first inductor and said output, and a second inductor coupled to a common node of said first and second switches and said output.