US 11,949,332 B2
Hybrid power converter with two-phase control of flying capacitor balancing
Changjong Lim, Seoul (KR)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Mar. 29, 2022, as Appl. No. 17/707,092.
Prior Publication US 2023/0318447 A1, Oct. 5, 2023
Int. Cl. H02M 3/07 (2006.01); H02M 1/00 (2006.01)
CPC H02M 3/07 (2013.01) [H02M 1/0095 (2021.05)] 33 Claims
OG exemplary drawing
 
1. A power converter for converting an input voltage at an input of the power converter into an output voltage at an output of the power converter, the power converter comprising:
a plurality of phases including at least a first phase and a second phase, each of the plurality of phases comprising:
a switching node;
a power inductor coupled between the switching node and the output;
a flying capacitor having a first flying capacitor terminal and a second flying capacitor terminal;
a pump capacitor having a first pump capacitor terminal and a second pump capacitor terminal, the second pump capacitor terminal coupled to ground;
a first switch coupled between the input and the first flying capacitor terminal;
a second switch coupled between the first flying capacitor terminal and the switching node;
a third switch coupled between the second flying capacitor terminal and the switching node;
a fourth switch coupled between the second flying capacitor terminal and a ground voltage; and
balancing switches comprising:
a fifth switch coupled between the second capacitor terminal of the first phase and the first capacitor terminal of the second phase;
a sixth switch coupled between the first capacitor terminal of the second phase and the first capacitor terminal of the second phase;
a seventh switch coupled between the first capacitor terminal of the first phase and the first capacitor terminal of the second phase; and
an eighth switch coupled between the second capacitor terminal of the first phase and the second capacitor terminal of the second phase.