US 12,231,040 B2
Power conversion circuit for increasing conversion efficiency
Da Jin, Shanghai (CN); Yahong Xiong, Shanghai (CN); Litao Qian, Shanghai (CN); and Qinghua Su, Shanghai (CN)
Assigned to Delta Electronics, Inc., Taoyuan (TW)
Filed by Delta Electronics, Inc., Taoyuan (TW)
Filed on Nov. 15, 2022, as Appl. No. 17/987,548.
Claims priority of application No. 202111477525.0 (CN), filed on Dec. 6, 2021.
Prior Publication US 2023/0179092 A1, Jun. 8, 2023
Int. Cl. H02M 3/07 (2006.01); H02M 3/00 (2006.01); H02M 3/158 (2006.01); H02M 3/28 (2006.01)
CPC H02M 3/015 (2021.05) [H02M 3/1584 (2013.01); H02M 3/285 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power conversion circuit, receiving an input voltage and comprising:
a positive input terminal, a negative input terminal, a positive output terminal and a negative output terminal, wherein the negative input terminal is electrically connected to the negative output terminal;
a switch control assembly, comprising a first terminal, a second terminal, a third terminal, n+1 switches and n storage capacitors, wherein the first terminal is electrically connected to the positive input terminal, the n+1 switches are connected in series between the first terminal and the third terminal, a connection node connecting any two neighboring switches of the n+1 switches is electrically connected to the corresponding storage capacitor, each of the n storage capacitors is further electrically connected to the second terminal or the third terminal, and n is an integer larger than 1;
a first output inductor, wherein a first terminal of the first output inductor is electrically connected to the second terminal to form a first connection node, and a second terminal of the first output inductor is electrically connected to the positive output terminal;
a second output inductor, wherein a first terminal of the second output inductor is electrically connected to the third terminal to form a second connection node, and a second terminal of the second output inductor is electrically connected to the positive output terminal;
a first grounding switch, electrically connected between the second connection node and the negative output terminal; and
a second grounding switch, electrically connected between the first connection node and the negative output terminal,
wherein a voltage amplitude of the first connection node or the second connection node equals a difference between voltages of any two of the n storage capacitors, or equals a voltage amplitude of one of the n storage capacitors, or equals a difference between the input voltage and a voltage amplitude of one of the n storage capacitors.