DCDC converter with low electromagnetic interference EMI

• Main Authors: XIONG JING, CHANG CHENGXING, DING XIAOBING, CHENG XUEBIN, SUO WUSHENG
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2024
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; BASIC ELECTRIC ELEMENTS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

The invention relates to the technical field of integrated circuits, and discloses a DCDC converter with low electromagnetic interference (EMI), which comprises a packaging shell, a DCDC bare chip and an annular inductor are arranged in the packaging shell, an output bonding pad corresponding to the bare chip is connected with the input end of the annular inductor, a feedback bonding pad corresponding to the bare chip is connected with the output end of the annular inductor, and the output bonding pad is connected with the output end of the annular inductor. The annular inductor and the annular inductor are jointly arranged in the packaging shell, and the output end of the annular inductor is further led out of the packaging shell to serve as an output voltage pin, such as an SW pin, of the novel DCDC chip. In this way, electromagnetic interference EMI can be reduced, the area, occupied by a conversion module or a voltage stabilizing module and the like constructed by the DCDC chip, of a PCB can be reduced, a