Efficient boost-buck converter and control method thereof
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorWei Chen
Life of this patent
Estimating the term…
Abstract
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.
Claims16
A method of controlling a boost-buck converter, the method comprising:
- a) receiving, by a control circuit, an input voltage from an input terminal of said boost-buck converter;
- b) receiving, by said control circuit, an output voltage from an output terminal of said boost-buck converter;
- c) controlling, by said control circuit, switching operations of first, second, third, and fourth switches of said boost-buck converter 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 switch directly connected to said input terminal and to a first node, said second switch directly connected to said first node and to a ground terminal, a first inductor directly connected to said input terminal and to a second node, said third switch directly connected to said second node and to said ground terminal, said fourth switch directly connected to said second node and to said output terminal, and a second inductor directly connected to said first node and to said output terminal.
A boost-buck converter, comprising:
- a) a first switch directly connected to a first node and to an input terminal of said boost-buck converter;
- b) a second switch directly connected to said first node and to a ground terminal;
- c) a first inductor directly connected to said input terminal and to a second node;
- d) a third switch directly connected to said second node and to said ground terminal;
- e) a fourth switch directly connected to said second node and to an output terminal of said boost-buck converter;
- f) a second inductor directly connected to said first node and to said output terminal;
- and
- g) a control circuit configured to receive an input voltage from said input terminal and an output voltage from said output terminal, and to control switching operations of said 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.
Dependencies are inferred from the claim text.