# US 12,763,585 B2 · Charger > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,763,585 B2 - Document ID: US12763585B2 - Status: Granted - Kind: B2 - Application number: 18/217,486 - Filed: 2023-06-30 - Published: 2023-10-26 - Granted: 2026-10-13 - Earliest claimed: 2020-12-31 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co., Ltd. - Inventors: Dahuan Li - Web page: https://patentgrep.com/patent/US12763585B2 ## CPC - H02J 7/06: using discharge tubes or semiconductor devices - H02M 1/0058: {by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero (using an auxiliary actively switched resonant commutation circuit connected to an intermediate DC voltage or between two push-pull branches of an inverter bridge H02M7/4811; in resonant inverters H02M7/4815; in inverters operating from a resonant DC source H02M7/4826)} - H02M 3/33523: {with galvanic isolation between input and output of both the power stage and the feedback loop} - H02M 3/33592: {having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer} - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A charger is provided. The charger includes: a first power input end, a second power input end, a power output end, a switching module, and a transformer. The switching module is separately connected to the first power input end and the second power input end. A primary side of the transformer is provided with a first resonant unit connected to the switching module. A secondary-side winding of the transformer is connected to the power output end. The switching module is capable of switching between a first on state and a second on state. When the switching module is in the first on state, input power at the first power input end is coupled to the secondary-side winding through the first resonant unit and is output through the power output end. ## Claims ### Claim 1 A charger, comprising: a first power input end; a second power input end; a power output end; a switching module separately connected to the first power input end and the second power input end; and a transformer, wherein a primary side of the transformer is provided with a first resonant unit connected to the switching module, and a secondary-side winding of the transformer is connected to the power output end, wherein the switching module is configured to switch between a first on state in which input power at the first power input end is coupled to the secondary-side winding through the first resonant unit and is output through the power output end and a second on state in which power discharged by the first resonant unit is transmitted to the first power input end through the second power input end. ### Claim 2 (depends on 1) The charger according to claim 1, wherein the switching module comprises: a first switch unit and a second switch unit, wherein: a first end of the first switch unit is connected to the first power input end, a second end of the first switch unit is separately connected to a first end of the second switch unit and a first end of the first resonant unit, and both a second end of the second switch unit and a second end of the first resonant unit are connected to the second power input end; and wherein: when the switching module is in the first on state, the first switch unit is in an on state, and the second switch unit is in an off state, or when the switching module is in the second on state, the first switch unit is in an off state, and the second switch unit is in an on state. ### Claim 3 (depends on 1) The charger according to claim 1, further comprising: a second resonant unit connected to the switching module, wherein: when the first resonant unit is in a working state, the second resonant unit is in a non-working state; or when the first resonant unit is in a non-working state, the second resonant unit is in a working state, and when the switching module is in the first on state, the input power at the first power input end is coupled to the secondary-side winding through the second resonant unit and is output through the power output end; or when the switching module is in the second on state, power discharged by the second resonant unit is transmitted to the first power input end through the second power input end. ### Claim 4 (depends on 3) The charger according to claim 3, wherein: the first resonant unit comprises a first switch element, and the second resonant unit comprises a second switch element; the charger further comprises a power control module separately connected to the first switch element and the second switch element; and the power control module is configured to: control one of the first switch element and the second switch element to be in an on state and control the other one of the first switch element and the second switch element to be in an off state, wherein: when the first switch element is in the on state, the first resonant unit is in the working state, and the second resonant unit is in the non-working state; or when the second switch element is in the on state, the second resonant unit is in the working state, and the first resonant unit is in the non-working state. ### Claim 5 (depends on 4) The charger according to claim 4, wherein when the charger charges an electrical device, the power control module is configured to obtain a required voltage fed back by the electrical device; and wherein: when the required voltage is in a range from a first voltage V1 to a second voltage V2, the power control module controls the first switch element to be in the on state, and controls the second switch element to be in the off state; or when the required voltage is in a range from a third voltage V3 to a fourth voltage V4, the power control module controls the first switch element to be in the off state, and controls the second switch element to be in the on state, wherein V3 is greater than V1, and V4 is greater than V2. ### Claim 6 (depends on 5) The charger according to claim 5, further comprising: a first charging interface connected to the power output end; and a protocol control module separately connected to the first charging interface and the power control module, wherein when the first charging interface is connected to a second charging interface of the electrical device, the protocol control module obtains the required voltage fed back by the electrical device, and feeds back the required voltage to the power control module. ### Claim 7 (depends on 4) The charger according to claim 4, wherein the first resonant unit further comprises a first primary-side winding and a first capacitor, wherein: a first end of the first capacitor is connected to the switching module, a second end of the first capacitor is connected to a first end of the first primary-side winding, and a second end of the first primary-side winding is connected to the second power input end through the first switch element. ### Claim 8 (depends on 7) The charger according to claim 7, wherein the first switch element is a switching transistor, and the second switch element is another switching transistor. ### Claim 9 (depends on 4) The charger according to claim 4, wherein the second resonant unit further comprises a second primary-side winding and a second capacitor, wherein: a first end of the second capacitor is connected to the switching module, a second end of the second capacitor is connected to a first end of the second primary-side winding, and a second end of the second primary-side winding is connected to the second power input end through the second switch element. ### Claim 10 (depends on 9) The charger according to claim 9, wherein the first switch element is a switching transistor, and the second switch element is another switching transistor. ### Claim 11 (depends on 4) The charger according to claim 4, wherein the first resonant unit further comprises a first primary-side winding and a first capacitor, and the second resonant unit further comprises a second primary-side winding, wherein: a first end of the first capacitor is connected to the switching module, a second end of the first capacitor is separately connected to a first end of the first primary-side winding and a first end of the second primary-side winding, a second end of the first primary-side winding is connected to the second power input end through the first switch element, and a second end of the second primary-side winding is connected to the second power input end through the second switch element. ### Claim 12 (depends on 11) The charger according to claim 11, wherein the first switch element is a switching transistor, and the second switch element is another switching transistor.