# US 10,873,255 B2 · Power supply device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,873,255 B2 - Document ID: US10873255B2 - Status: Granted - Kind: B2 - Application number: 16/909,992 - Filed: 2020-06-23 - Published: 2020-10-08 - Granted: 2020-12-22 - Earliest claimed: 2017-12-27 - Assignees: Murata Manufacturing Co., Ltd. - Applicants: Murata Manufacturing Co., Ltd. - Inventors: Hiroyuki Takatsuji; Hiroshi Kitada; Naomichi Enoki; Yoshihiro Imanishi - Web page: https://patentgrep.com/patent/US10873255B2 ## CPC - H03H 7/427: {Common-mode filters (H02J3/01 and H02M1/126 takes precedence)} - H01F 17/00: Fixed inductances of the signal type - H02M 1/126: {using passive filters} - H02M 1/4258: {using a single converter stage both for correction of AC input power factor and generation of a regulated and galvanically isolated DC output voltage (H02M1/4241 takes precedence)} - H02M 1/44: Circuits or arrangements for compensating for electromagnetic interference in converters or inverters - H02M 3/28: using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC - H02M 7/217: using semiconductor devices only - H03H 7/0115: {comprising only inductors and capacitors (H03H7/075, H03H7/09, H03H7/12, H03H7/13 take precedence)} - H01F 38/48: {Common mode inductor for reducing or eliminating common mode noise on parallel lines} - H02M 1/123: {Suppression of common mode voltage or current} - H02M 1/4225: {using a non-isolated boost converter} - Y02B 70/10: Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes - H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P) - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - 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) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract An on-board charger includes input ports, output ports, an AC-DC converter, an isolated DC-DC converter, a first filter, and a second filter. The first filter is connected to the input ports. The first filter includes a first common mode choke coil, a first across-the-line capacitor, and first line bypass capacitors. The second filter is connected between the isolated DC-DC converter and each of the output ports. The second filter includes a second common mode choke coil and second line bypass capacitors. ## Claims ### Claim 1 A power supply device comprising: input ports respectively connected to two alternating current lines to which alternating current power is input; output ports respectively connected to two direct current lines from which direct current power is output; a first filter connected to the input ports; an AC-DC converter that is connected to the first filter and that is configured to convert the alternating current power to the direct current power; an isolated DC-DC converter that is connected to the AC-DC converter and that is configured to convert a direct current voltage to a direct current voltage having a predetermined voltage value; and a second filter connected between the isolated DC-DC converter and each of the output ports, wherein the first filter includes at least one first common mode choke coil connected at halfway points of the two alternating current lines, at least one first across-the-line capacitor connected between the two alternating current lines, and at least one first line bypass capacitor connected between each of the two alternating current lines and a ground, and the second filter includes at least one second common mode choke coil and a second line bypass capacitor, the second common mode choke coil being connected at halfway points of the two direct current lines, the second line bypass capacitor being connected between each of the two direct current lines and a ground. ### Claim 2 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of the first across-the-line capacitor, the first common mode choke coil, and the first line bypass capacitor according to nearness to the input ports. ### Claim 3 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of one of the first across-the-line capacitors, the first common mode choke coil, the first line bypass capacitor, and one of the first across-the-line capacitors according to nearness to the input ports. ### Claim 4 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of one of the first across-the-line capacitors, one of the first common mode choke coils, the first line bypass capacitor, one of the first across-the-line capacitors, and one of the first common mode choke coils according to nearness to the input ports. ### Claim 5 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of one of the first across-the-line capacitors, one of the first common mode choke coils, one of the first line bypass capacitors, one of the first across-the-line capacitors, one of the first common mode choke coils, and one of the first line bypass capacitors according to nearness to the input ports. ### Claim 6 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of one of the first across-the-line capacitors, one of the first common mode choke coils, one of the first line bypass capacitors, one of the first across-the-line capacitors, one of the first common mode choke coils, one of the first line bypass capacitors, and one of the first across-the-line capacitors according to nearness to the input ports. ### Claim 7 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of one of the first across-the-line capacitors, one of the first common mode choke coils, one of the first line bypass capacitors, one of the first across-the-line capacitors, one of the first common mode choke coils, one of the first across-the-line capacitors, and one of the first line bypass capacitors according to nearness to the input ports. ### Claim 8 (depends on 1) The power supply device according to claim 1, wherein in the second filter, the second common mode choke coil is connected closer to an output side than the second line bypass capacitor is. ### Claim 9 (depends on 1) The power supply device according to claim 1, wherein in the second filter, the second line bypass capacitor is connected closer to an output side than the second common mode choke coil is connected. ### Claim 10 (depends on 1) The power supply device according to claim 1, wherein in the second filter, connection is formed in order of one of the second common mode choke coils, the second line bypass capacitor, and one of the second common mode choke coils according to nearness to the output ports. ### Claim 11 (depends on 1) The power supply device according to claim 1, wherein an inductance value of the at least one second common mode choke coil included in the second filter is lower than an inductance value of the at least one first common mode choke coil included in the first filter. ### Claim 12 (depends on 1) The power supply device according to claim 1, wherein in the first filter, connection is formed in order of one of the first across-the-line capacitors, one of the first common mode choke coils, one of the first across-the-line capacitors, one of the first line bypass capacitors, one of the first common mode choke coils, and one of the first line bypass capacitors according to nearness to the input ports, in the second filter, connection is formed in order of the second line bypass capacitor and the second common mode choke coil according to nearness to the output ports, an inductance value of the second common mode choke coil included in the second filter is lower than an inductance value of the at least one first common mode choke coil included in the first filter, and a common mode impedance value of the second common mode choke coil included in the second filter at 30 MHz is lower than twice as high as a common mode impedance value of one of the two first common mode choke coils that has a higher value, the two first common mode choke coils being included in the first filter. ### Claim 13 (depends on 1) The power supply device according to claim 1, wherein the power supply device is applied to an on-board charger. ### Claim 14 (depends on 2) The power supply device according to claim 2, wherein in the second filter, the second common mode choke coil is connected closer to an output side than the second line bypass capacitor is. ### Claim 15 (depends on 3) The power supply device according to claim 3, wherein in the second filter, the second common mode choke coil is connected closer to an output side than the second line bypass capacitor is. ### Claim 16 (depends on 2) The power supply device according to claim 2, wherein in the second filter, the second line bypass capacitor is connected closer to an output side than the second common mode choke coil is connected. ### Claim 17 (depends on 3) The power supply device according to claim 3, wherein in the second filter, the second line bypass capacitor is connected closer to an output side than the second common mode choke coil is connected. ### Claim 18 (depends on 2) The power supply device according to claim 2, wherein in the second filter, connection is formed in order of one of the second common mode choke coils, the second line bypass capacitor, and one of the second common mode choke coils according to nearness to the output ports. ### Claim 19 (depends on 2) The power supply device according to claim 2, wherein an inductance value of the at least one second common mode choke coil included in the second filter is lower than an inductance value of the at least one first common mode choke coil included in the first filter. ### Claim 20 (depends on 2) The power supply device according to claim 2, wherein the power supply device is applied to an on-board charger.