Power supply circuit and electric equipment

• Main Authors: YU BING, WANG XIAOBAO, YANG HONGXIANG, ZHAO WEIJUN, MOU JIAWEI
• Format: Patent
• Language: Chinese; English
• Published: 17.04.2020
• 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; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

The invention discloses a power supply circuit and electric equipment. The power supply circuit comprises a current replication circuit and two adjustable resistance circuits, wherein the current replication circuit comprises a current input circuit and a current output circuit, the current input circuit is used for generating a first reference current, and the current output circuit is used for replicating and outputting a second reference current, and the second reference current is proportional to the first reference current; each adjustable resistance circuit comprises a resistance circuitand a control circuit, and the control circuit is set to adjust the resistance value of the resistance circuit according to the input voltage difference so as to enable the input voltage difference to be within a preset range; a resistance circuit of the first adjustable resistance circuit and the current input circuit are connected in series between the first power supply end and the grounding end; and a resistance circ