# US 11,309,794 B2 · Switching 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 11,309,794 B2 - Document ID: US11309794B2 - Status: Granted - Kind: B2 - Application number: 16/616,606 - Filed: 2018-04-12 - Published: 2020-06-11 - Granted: 2022-04-19 - Earliest claimed: 2017-05-31 - Assignees: Hitachi Astemo, Ltd. - Applicants: Hitachi Automotive Systems, Ltd. - Inventors: Naoya Takahashi; Kenji Kubo; Takuma Ono - Web page: https://patentgrep.com/patent/US11309794B2 ## CPC - H03K 7/08: Duration or width modulation {; Duty cycle modulation} - H02M 3/156: with automatic control of output voltage or current, e.g. switching regulators - H02M 3/157: with digital control - H02M 3/158: including plural semiconductor devices as final control devices for a single load - H02M 3/33573: {Full-bridge at primary side of an isolation transformer} - H02M 1/0025: {Arrangements for modifying reference values, feedback values or error values in the control loop of a converter} - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) - 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 There is provided a switching power supply device which has a high voltage control resolution. A switching power supply device according to the present invention includes: a power conversion circuit which includes a switching element; and a control circuit unit which outputs a driving pulse to the switching element based on an output voltage command value and an output voltage value of the power conversion circuit, and the control circuit unit changes a switching cycle and outputs a driving pulse based on a difference between a calculation value of an operation amount based on the output voltage command value and the output voltage value, and a setting value of the operation amount. ## Claims ### Claim 1 A switching power supply device comprising: a power conversion circuit which includes a switching element; and a control circuit unit which outputs a driving pulse to the switching element based on an output voltage command value of the power conversion circuit and an output voltage value of the power conversion circuit, wherein the control circuit unit is configured to: calculate a calculation value of a manipulated variable based on an output voltage command value and the output voltage value, calculate a setting value of the manipulated variable which is converted from the calculation value of the manipulated variable into a clock signal cycle unit, decrease a switching cycle of the switching element when the setting value of the manipulated variable is less than the calculation value of the manipulated variable, and increase the switching cycle of the switching element when the setting value of the manipulated variable is greater than the calculation value of the manipulated variable. ### Claim 2 (depends on 1) The switching power supply device according to claim 1, wherein an on time of the driving pulse is an operation amount. ### Claim 3 (depends on 2) The switching power supply device according to claim 2, wherein the control circuit unit includes a unit which generates a clock signal, and the setting value is a multiple of a natural number of a clock cycle. ### Claim 4 (depends on 2) The switching power supply device according to claim 2, wherein the control circuit unit makes a change amount of the switching cycle proportional to the difference. ### Claim 5 (depends on 4) The switching power supply device according to claim 4, wherein the control circuit unit includes a unit which detects an input voltage and/or an output voltage of the power conversion circuit, and changes a proportionality factor which determines the change amount of the switching cycle based on the input voltage and/or the output voltage. ### Claim 6 (depends on 2) The switching power supply device according to claim 2, wherein the power conversion circuit and the control circuit unit includes a unit which generates a clock signal, and calculates a change amount of the switching cycle such that the switching cycle is an even-numbered clock. ### Claim 7 (depends on 1) The switching power supply device according to claim 1, wherein the power conversion circuit includes a first switching leg which is formed by connecting a first switching element and a second switching element in series, and a second switching leg which is formed by connecting a third switching element and a fourth switching element in series, and is a full-bridge circuit in which a portion between both ends of the first switching leg and the second switching leg is a portion between direct current terminals, and a portion between a series connection point of the first switching element and the second switching element, and a series connection point of the third switching element and the fourth switching element is a portion between alternating current terminals, and a phase difference between the driving pulse for the first switching leg and the driving pulse for the second switching leg is an operation amount. ### Claim 8 (depends on 7) The switching power supply device according to claim 7, wherein the control circuit unit includes a unit which generates a clock signal, and the setting value is a multiple of a natural number of a clock cycle. ### Claim 9 (depends on 7) The switching power supply device according to claim 7, wherein the power conversion circuit and the control circuit unit includes a unit which generates a clock signal, and calculates a change amount of the switching cycle such that the switching cycle is an even-numbered clock. ### Claim 10 (depends on 7) The switching power supply device according to claim 7, wherein the control circuit unit makes a change amount of the switching cycle proportional to the difference. ### Claim 11 (depends on 10) The switching power supply device according to claim 10, wherein the control circuit unit includes a unit which detects an input voltage and/or an output voltage of the power conversion circuit, and changes a proportionality factor which determines the change amount of the switching cycle based on the input voltage and/or the output voltage.