Buck-boost converter with continuously switching buck-boost control

摘要

A buck-boost converter comprises:an inductance (101) having a first (103) and a second (105) connection;an electronic switch A configured to cause the first connection (103) to the inductance to be controllably coupled to an input voltage source (107);an electronic switch B configured to cause the first connection (103) to the inductance to be controllably coupled to a ground (109);an electronic switch C configured to cause the second connection (105) to the inductance to be controllably coupled to a ground (109);an electronic switch D configured to cause the second connection (105) to the inductance to be controllably coupled to a load output (113);a capacitance (115) configured to filter the load output (113); anda switch controller (117) configured to cause switch A, B, C, & D to be open when, respectively, switch B, A, D, and C is closed and to cause switches A, B, C, and/or D to cyclically close such that switches B and C are closed during at least one interval of each cycle during both buck and boost modes of operation.