US 12,444,924 B2
DC-DC converter
Sun Ho Bae, Anyang-si (KR); and Jae Ho Lee, Anyang-si (KR)
Assigned to LS ELECTRIC CO., LTD., Anyang-si (KR)
Appl. No. 18/274,406
Filed by LS ELECTRIC CO., LTD., Anyang-si (KR)
PCT Filed Mar. 21, 2022, PCT No. PCT/KR2022/003904
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/225197, PCT Pub. Date Oct. 27, 2022.
Claims priority of application No. 10-2021-0052425 (KR), filed on Apr. 22, 2021.
Prior Publication US 2024/0088643 A1, Mar. 14, 2024
Int. Cl. H02M 3/158 (2006.01); H02H 7/12 (2006.01)
CPC H02H 7/1213 (2013.01) [H02M 3/158 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A DC-DC converter, comprising:
a driving circuit comprising a switch part and a flying capacitor configured to convert an input voltage of an input side into an output voltage of an output side; and
a protection circuit configured to be connected to the output side,
wherein the protection circuit is configured to block a fault current flowing to the switch part by lowering the output voltage step by step when a fault occurs, and
wherein the protection circuit comprises:
a first capacitor configured to be connected between a first node and a second node;
a second capacitor configured to be connected between the second node and a third node;
a first diode configured to be connected between the first node and a fourth node;
a second diode configured to be connected between the fourth node and a fifth node;
a third diode configured to be connected between the second node and the fourth node;
a fourth diode configured to be connected between the second node and a sixth node;
a fifth switch configured to be connected between the fifth node and the sixth node; and
a sixth switch configured to be connected between the third node and the sixth node.