Hybrid architecture for DC-DC conversion
AssigneeDialog Semiconductor (UK) Limited
InventorSantosh Kulkarni
Life of this patent
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Abstract
A Hybrid DC-DC switching converter architecture is described. The Hybrid architecture includes a capacitive converter cascaded by an inductive converter for a boost switching converter, and an inductive converter cascaded by a capacitive converter for a buck switching converter. A capacitor at an intermediate node and a switch in the capacitive converter are removed. Reducing the switching converter by one switch and one capacitor results in a smaller implementation area. A single regulation circuit and an inductor with a smaller saturation current (Isat) are used.
Claims25
A Hybrid DC-DC boost switching converter architecture, comprising:
- a first stage, comprising a capacitive converter, wherein the capacitive converter comprises a plurality of switches and a capacitor,
- wherein the plurality of switches and the capacitor comprises:
- a first resistor between an input voltage and a first node of a first switch, and a second resistor between the input voltage and a first node of a second switch;
- a first capacitor connected between an intermediate node, which is also a second node of the first switch, and a first node of a third switch, which is also a second node of the second switch;
- and
- a third resistor between a second node of the third switch and a reference terminal (e.g. ground);
- a second stage, comprising an inductive converter;
- and
- wherein the first stage is cascaded by the second stage.
A Hybrid DC-DC buck switching converter architecture, comprising:
- a first stage, comprising an inductive converter;
- a second stage, comprising a capacitive converter, the capacitive converter comprising a plurality of switches and a capacitor,
- wherein the plurality of switches and the capacitor comprises:
- a first resistor between an input voltage and a first node of a first switch, and a second resistor between the input voltage and a first node of a second switch;
- a first capacitor connected between an intermediate node, which is also a second node of the first switch, and a first node of a third switch, which is also a second node of the second switch;
- and
- a third resistor between a second node of the third switch and a reference terminal (e.g. ground);
- and wherein the first stage is cascaded by the second stage.
A method for a Hybrid DC-DC boost switching converter architecture, comprising:
- cascading a first stage, comprising a plurality of switches and a capacitor,
- wherein the plurality of switches and the capacitor comprises:
- a first resistor between an input voltage and a first node of a first switch, and a second resistor between the input voltage and a first node of a second switch;
- a first capacitor connected between an intermediate node, which is also a second node of the first switch, and a first node of a third switch, which is also a second node of the second switch;
- and
- a third resistor between a second node of the third switch and a reference terminal (e.g. ground);
- by a second stage, comprising an inductive converter.
A method for a Hybrid DC-DC buck switching converter architecture, comprising:
- cascading a first stage, comprising an inductive converter, by a second stage, comprising a plurality of switches and a capacitor,
- wherein the plurality of switches and the capacitor comprises:
- a first resistor between an input voltage and a first node of a first switch, and a second resistor between the input voltage and a first node of a second switch;
- a first capacitor connected between an intermediate node, which is also a second node of the first switch, and a first node of a third switch, which is also a second node of the second switch;
- and
- a third resistor between a second node of the third switch and a reference terminal (e.g. ground).
Dependencies are inferred from the claim text.