WO2022002096A1 - Circuit de condensateurs à commutation résonante et dispositif électronique - Google Patents

Circuit de condensateurs à commutation résonante et dispositif électronique Download PDF

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Publication number
WO2022002096A1
WO2022002096A1 PCT/CN2021/103356 CN2021103356W WO2022002096A1 WO 2022002096 A1 WO2022002096 A1 WO 2022002096A1 CN 2021103356 W CN2021103356 W CN 2021103356W WO 2022002096 A1 WO2022002096 A1 WO 2022002096A1
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Prior art keywords
circuit
switch tube
switch
resonant
pole
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Application number
PCT/CN2021/103356
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English (en)
Chinese (zh)
Inventor
李鑫
彭江
张俊贺
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华为技术有限公司
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Publication of WO2022002096A1 publication Critical patent/WO2022002096A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/002—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection
    • H02H11/003—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of inverted polarity or connection; with switching for obtaining correct connection using a field effect transistor as protecting element in one of the supply lines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—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

Definitions

  • the present application relates to the technical field of charging, and in particular, to a resonant switched capacitor circuit and an electronic device.
  • the above-mentioned RSC circuit includes multiple groups of resonant networks formed by series-connected inductors and capacitors , by controlling the resonant frequency of the resonant network to realize the charging and discharging of the capacitor and the inductor, so as to achieve the process of reducing the voltage.
  • EMI electromagnetic interference
  • Embodiments of the present application provide a resonant switched capacitor circuit and an electronic device, which are used to improve the problem that the number of capacitors and inductances in an RSC circuit for realizing fast charging increases, resulting in a larger board area of the RSC circuit.
  • a resonant switched capacitor circuit in one aspect of the embodiments of the present application, includes a resonant inductor and an N-phase switched capacitor SC circuit.
  • the first end of the resonant inductor is electrically connected to the load.
  • the input ends of the N-phase SC circuit are connected in parallel and electrically connected to the same power source.
  • the output end of the N-phase SC circuit is connected in parallel and is electrically connected to the second end of the resonant inductor.
  • N ⁇ 2, N is an integer.
  • each phase SC circuit includes at least one resonance capacitor.
  • Each resonant capacitor of the N-phase SC circuit is connected in parallel and in series with the resonant inductor.
  • the resonant inductor and the resonant capacitor in the SC circuit are used for charging.
  • the resonant inductor and the resonant capacitor in the SC circuit are also used to discharge to supply power to the load.
  • the inductance value of the resonant inductor can be the same as the inductance value of the total resonant inductor of the resonant switched capacitor circuit. Therefore, the purpose of reducing the number of resonant inductances can be achieved.
  • each resonant capacitor of the N-phase SC circuit is connected in series with the resonant inductor, the capacitance value of a single resonant capacitor in each phase SC circuit is 1/M of the total resonant capacitor of the resonant switched capacitor circuit.
  • M is the number of parallel resonant capacitors in the resonant switched capacitor circuit.
  • the capacitance value of a single resonant capacitor in each phase SC circuit decreases more. Therefore, the size of a single resonant capacitor in each phase SC circuit can be effectively reduced, thereby effectively reducing the board area of the resonant switched capacitor circuit, which is beneficial to the miniaturized design of electronic equipment.
  • the SC circuit includes a resonant capacitor.
  • the SC circuit further includes a first switch transistor, a second switch transistor, a third switch transistor and a fourth switch transistor.
  • the first pole of the first switch tube is used as the input end of the SC circuit, and the second pole of the first switch tube is electrically connected to the first end of the resonance capacitor.
  • the first pole of the second switch tube is electrically connected to the second pole of the first switch tube, and the second pole of the second switch tube serves as the output end of the SC circuit and is electrically connected to the second end of the resonant inductor.
  • the first pole of the third switch tube is electrically connected to the second pole of the second switch tube, and the second pole of the third switch tube is electrically connected to the second end of the resonance capacitor.
  • the first pole of the fourth switch tube is electrically connected to the second pole of the third switch tube, and the second pole of the fourth switch tube is grounded.
  • the gates of the first switch tube and the third switch tube are used to receive the same drive signal
  • the gates of the second switch tube and the fourth switch tube are used to receive the same drive signal
  • the driving signal received by the gate of the second switch tube is an equal-amplitude inverted signal.
  • the battery is discharged to the battery as the load through the resonant capacitor.
  • the voltage conversion is realized during the charging and discharging process of the resonant capacitor, wherein the ratio of the input voltage to the output voltage of the resonant switched capacitor circuit is 2:1.
  • the resonant switched capacitor circuit includes at least two-phase SC circuits, which are a first SC circuit and a second SC circuit, respectively.
  • the resonant switched capacitor circuit further includes a first control signal terminal and a second control signal terminal, and the driving signal output by the first control signal terminal and the driving signal output by the second control signal terminal are equal-amplitude inverse signals.
  • the gates of the first switch tube and the third switch tube in the first SC circuit and the gates of the second switch tube and the fourth switch tube in the second SC circuit are all electrically connected to the first control signal terminal.
  • the gates of the second switch tube and the fourth switch tube in the first SC circuit and the gates of the first switch tube and the third switch tube in the second SC circuit are all electrically connected to the second control signal terminal.
  • the SC circuit includes two resonant capacitors, which are a first resonant capacitor and a second resonant capacitor, respectively.
  • the SC circuit also includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, and a fifth switch.
  • the first pole of the first switch tube is used as the input end of the SC circuit, and the second pole of the first switch tube is electrically connected to the first end of the first resonance capacitor.
  • the first pole of the second switch tube is electrically connected to the second pole of the first switch tube.
  • the first pole of the third switch tube is electrically connected to the second pole of the second switch tube, and the second pole of the third switch tube is electrically connected to the first end of the second resonant capacitor.
  • the first pole of the fourth switch tube is electrically connected to the second pole of the third switch tube, and the second pole of the fourth switch tube is electrically connected to the second end of the resonant inductor.
  • the first pole of the fifth switch tube is electrically connected to the second end of the resonant inductor as the output end of the SC circuit, and the second pole of the fifth switch tube is electrically connected to the second end of the first resonant capacitor.
  • the first pole of the sixth switch tube is electrically connected to the second pole of the fifth switch tube, and the second pole of the sixth switch tube is grounded.
  • the first pole of the seventh switch tube is electrically connected to the first pole of the fifth switch tube.
  • the first end of the flying capacitor is electrically connected to the second pole of the second switch tube, and the second end of the flying capacitor is electrically connected to the second pole of the seventh switch tube.
  • the first pole of the eighth switch tube is electrically connected to the second pole of the seventh switch tube, and the second pole of the eighth switch tube is grounded.
  • the first pole of the ninth switch tube is electrically connected to the first pole of the fifth switch tube, and the second pole of the ninth switch tube is electrically connected to the second end of the second resonant capacitor.
  • the first pole of the tenth switch tube is electrically connected to the second pole of the ninth switch tube, and the second pole of the tenth switch tube is grounded.
  • the gates of the first switch tube, the third switch tube, the fifth switch tube, the eighth switch tube and the ninth switch tube are used to receive the same driving signal, the second switch tube, the fourth switch tube, the sixth switch tube,
  • the gates of the seventh switch tube and the tenth switch tube are used to receive the same drive signal; the drive signals received by the gate of the first switch tube and the gate of the second switch tube are equal-amplitude inverse signals.
  • the switch array formed by the switch tubes of each phase SC circuit alternately forms a charging loop and a discharging loop in a specific way, so that the resonant capacitor is charged in the charging loop, and in the discharging loop The battery as the load is discharged through the resonant capacitor.
  • the voltage conversion is realized during the charging and discharging process of the resonant capacitor, wherein the ratio of the input voltage to the output voltage of the resonant switched capacitor circuit is 4:1.
  • the resonant switched capacitor circuit includes at least two-phase SC circuits, which are a first SC circuit and a second SC circuit, respectively.
  • the resonant switched capacitor circuit further includes a first control signal terminal and a second control signal terminal, and the driving signal output by the first control signal terminal and the driving signal output by the second control signal terminal are equal-amplitude inverse signals.
  • the gates of the sixth switch tube, the seventh switch tube and the tenth switch tube are all electrically connected to the first control signal terminal.
  • the resonant switched capacitor circuit further includes an output capacitor, the first end of the output capacitor is electrically connected to the first end of the resonant inductor, and the second end of the output capacitor is grounded.
  • the output capacitor Through the output capacitor, the output current of the resonant switched capacitor circuit can be stabilized and the ripple of the output current can be reduced.
  • Another aspect of the embodiments of the present application provides an electronic device, the electronic device has an external interface, and the electronic device includes a battery and any one of the above resonant switched capacitor circuits.
  • the resonant switched capacitor circuit is electrically connected with the external interface and the battery, and the resonant switched capacitor circuit is used to step down the voltage input from the external interface and then apply it to the battery, and provide a first charging current I1 to the battery.
  • the electronic device has the same technical effect as the resonant switched capacitor circuit provided by the foregoing embodiments, and details are not described herein again.
  • the electronic device further includes a step-down circuit and a processor.
  • the step-down circuit is electrically connected with the external interface and the battery, and the step-down circuit is used to step down the voltage input from the external interface and then apply it to the battery, and provide the second charging current I2 to the battery.
  • the processor is electrically connected with the step-down circuit, the resonant switched capacitor circuit and the battery, and the processor is used for detecting the charging current of the battery.
  • the processor is further configured to control the resonant switched capacitor circuit to provide the first charging current I1 to the battery.
  • the processor is further configured to control the step-down circuit to provide the second charging current I2 to the battery.
  • the processor controls the resonant switched capacitor circuit to charge the battery, and when standard charging of the mobile phone is required, the processor controls the step-down circuit to work.
  • the electronic device further includes a bidirectional cutoff switch tube, the gate end of the bidirectional cutoff switch tube is electrically connected to the processor, the first pole of the bidirectional cutoff switch tube is electrically connected to the external interface, and the second pole of the bidirectional cutoff switch tube is electrically connected to the processor.
  • the resonant switched capacitor circuit and the step-down circuit are electrically connected.
  • the bidirectional cut-off switch tube is used to disconnect the external interface from the resonant switched capacitor circuit and the step-down circuit when the processor outputs the cut-off signal.
  • the phenomenon that the battery of the electronic device is poured back into the external charger will not occur when the internal voltage of the electronic device is high and the voltage of the external charger is low. Or, when the battery is fully charged, even if the electronic device is electrically connected to the external charger or adapter, the external charger or adapter will not continue to charge the electronic device.
  • a method for controlling a resonant switched capacitor circuit where the resonant switched capacitor circuit includes a resonant inductor and an N-phase SC circuit.
  • the input terminals of the N-phase SC circuit are connected in parallel.
  • the output end of the N-phase SC circuit is connected in parallel and is electrically connected to the second end of the resonant inductor.
  • N ⁇ 2, N is an integer.
  • each phase SC circuit includes at least one resonant capacitor; the resonant capacitors in the N-phase SC circuit are connected in parallel and in series with the resonant inductor.
  • the control method includes: in the first half period of the resonance period, the input terminal of the SC circuit receives an electrical signal to charge the resonance capacitor in the SC circuit of at least one phase. During the second half of the resonant period, the resonant capacitor in at least one phase SC circuit discharges and supplies power to the load.
  • the control method of the resonant switched capacitor circuit described above has the same technical effect as the resonant switched capacitor circuit provided by the foregoing embodiments, and details are not described herein again.
  • the SC circuit includes a resonant capacitor.
  • the SC circuit further includes a first switch transistor, a second switch transistor, a third switch transistor and a fourth switch transistor.
  • the first pole of the first switch tube is used as the input end of the SC circuit, and the second pole of the first switch tube is electrically connected to the first end of the resonance capacitor.
  • the first pole of the second switch tube is electrically connected to the second pole of the first switch tube, and the second pole of the second switch tube serves as the output end of the SC circuit and is electrically connected to the second end of the resonant inductor.
  • the first pole of the third switch tube is electrically connected to the second pole of the second switch tube, the second pole of the third switch tube is electrically connected to the second end of the resonance capacitor; the first pole of the fourth switch tube is electrically connected to the third switch tube The second pole of the tube is electrically connected, and the second pole of the fourth switch tube is grounded.
  • the input terminal of the SC circuit receives an electrical signal
  • charging the resonance capacitor in at least one phase of the SC circuit includes: in the first half period of the resonance period, controlling the first switch tube and the third switch tube to be turned on, The second switch tube and the fourth switch tube are turned off, and the electrical signal received by the input end of the SC circuit passes through the first switch tube and the third switch tube to charge the resonance capacitor.
  • discharging the resonance capacitor in the SC circuit of at least one phase and supplying power to the load includes: in the second half period of the resonance period, controlling the second switch tube and the fourth switch tube to be turned on, and the first switch tube is turned on. The switch tube and the third switch tube are turned off, and the resonant capacitor discharges through the second switch tube and the fourth switch tube, and supplies power to the load.
  • the switch array formed by the switch tubes of each phase SC circuit alternately forms a charging loop and a discharging loop in a specific way, so that the resonant capacitor is charged in the charging loop, and in the discharging loop The battery as the load is discharged through the resonant capacitor.
  • the voltage conversion is realized during the charging and discharging process of the resonant capacitor, wherein the ratio of the input voltage to the output voltage of the resonant switched capacitor circuit is 2:1.
  • the SC circuit includes two resonant capacitors, which are a first resonant capacitor and a second resonant capacitor, respectively.
  • the SC circuit also includes a first switch, a second switch, a third switch, a fourth switch, a fifth switch, a sixth switch, a seventh switch, an eighth switch, a ninth switch, and a fifth switch.
  • the first pole of the first switch tube is used as the input end of the SC circuit, and the second pole of the first switch tube is electrically connected to the first end of the first resonance capacitor.
  • the first pole of the second switch tube is electrically connected to the second pole of the first switch tube; the first pole of the third switch tube is electrically connected to the second pole of the second switch tube, and the second pole of the third switch tube is electrically connected to the second pole of the second switch tube
  • the first ends of the two resonance capacitors are electrically connected.
  • the first pole of the fourth switch tube is electrically connected to the second pole of the third switch tube, and the second pole of the fourth switch tube is electrically connected to the second end of the resonant inductor.
  • the first pole of the fifth switch tube is electrically connected to the second end of the resonant inductor as the output end of the SC circuit, and the second pole of the fifth switch tube is electrically connected to the second end of the first resonant capacitor.
  • the first pole of the sixth switch tube is electrically connected to the second pole of the fifth switch tube, the second pole of the sixth switch tube is grounded; the first pole of the seventh switch tube is electrically connected to the first pole of the fifth switch tube.
  • the first end of the flying capacitor is electrically connected to the second pole of the second switch tube, and the second end of the flying capacitor is electrically connected to the second pole of the seventh switch tube.
  • the first pole of the eighth switch tube is electrically connected to the second pole of the seventh switch tube, and the second pole of the eighth switch tube is grounded.
  • the first pole of the ninth switch tube is electrically connected to the first pole of the fifth switch tube, and the second pole of the ninth switch tube is electrically connected to the second end of the second resonance capacitor.
  • the first pole of the tenth switch tube is electrically connected to the second pole of the ninth switch tube, and the second pole of the tenth switch tube is grounded; in the first half cycle of the resonance cycle, the input end of the SC circuit receives an electrical signal, and at least one phase
  • the charging of the resonant capacitor in the SC circuit includes: in the first half cycle of the resonant cycle, controlling the first switch tube, the third switch tube, the fifth switch tube, the eighth switch tube and the ninth switch tube to conduct, the second switch tube, The fourth switch tube, the sixth switch tube, the seventh switch tube and the tenth switch tube are turned off; the electrical signal received by the input end of the SC circuit charges the first resonant capacitor through the first switch tube and the fifth switch tube; The signal also charges the flying capacitor and the second resonance capacitor through the ninth switch tube, the third switch tube and the eighth switch tube.
  • discharging the resonance capacitor in the SC circuit of at least one phase and supplying power to the load includes: in the second half period of the resonance period, controlling the second switch tube, the fourth switch tube, and the sixth switch tube , the seventh switch tube and the tenth switch tube are turned on, the first switch tube, the third switch tube, the fifth switch tube, the eighth switch tube and the ninth switch tube are turned off; the first resonant capacitor passes through the second switch tube to fly Discharge across the capacitor; the flying capacitor passes through the seventh switch tube, and the second resonant capacitor supplies power to the load through the fourth switch tube.
  • the switch array formed by the switch tubes of each phase SC circuit alternately forms a charging loop and a discharging loop in a specific way, so that the resonant capacitor is charged in the charging loop, and in the discharging loop The battery as the load is discharged through the resonant capacitor.
  • the voltage conversion is realized during the charging and discharging process of the resonant capacitor, wherein the ratio of the input voltage to the output voltage of the resonant switched capacitor circuit is 4:1.
  • FIG. 1a is a schematic structural diagram of a charging system provided by an embodiment of the application.
  • Figure 1b is a schematic structural diagram of the electronic device in Figure 1a;
  • FIG. 2 is a schematic structural diagram of another charging system provided by an embodiment of the present application.
  • Fig. 3 is a kind of structural representation of RSC circuit in Fig. 2;
  • Fig. 4 is another kind of structural representation of RSC circuit in Fig. 2;
  • 5a is a schematic diagram of a working state of the first SC circuit in FIG. 4;
  • Fig. 5b is an equivalent schematic diagram of the circuit structure shown in Fig. 5a;
  • FIG. 6a is a schematic diagram of another working state of the first SC circuit in FIG. 4;
  • FIG. 6b is an equivalent schematic diagram of the circuit structure shown in FIG. 6a;
  • FIG. 7a is a schematic diagram of a working state of each phase SC circuit in FIG. 4;
  • Fig. 7b is another working state schematic diagram of each phase SC circuit in Fig. 4;
  • Fig. 8 is a kind of waveform diagram of the driving signal of the control switch tube in Fig. 7a or Fig. 7b;
  • Fig. 9a is another working state schematic diagram of each phase SC circuit in Fig. 4;
  • Fig. 9b is another working state schematic diagram of each phase SC circuit in Fig. 4;
  • Figure 10 is a waveform diagram of various signals in Figure 9a or Figure 9b;
  • FIG. 11 is another schematic structural diagram of the RSC circuit in FIG. 2;
  • Fig. 12 is another waveform diagram of the driving signal of the control switch in Fig. 7a or Fig. 7b;
  • FIG. 13 is another schematic structural diagram of the RSC circuit in FIG. 2;
  • FIG. 14a is a schematic diagram of another working state of the first SC circuit in FIG. 13;
  • Fig. 14b is an equivalent schematic diagram of the circuit structure shown in Fig. 14a;
  • FIG. 15a is a schematic diagram of another working state of the first SC circuit in FIG. 13;
  • Fig. 15b is an equivalent schematic diagram of the circuit structure shown in Fig. 15a;
  • FIG. 16 is another schematic structural diagram of the RSC circuit in FIG. 2 .
  • orientation terms such as “upper”, “lower”, “left” and “right” may include, but are not limited to, definitions relative to the orientations in which the components in the drawings are schematically placed. It should be understood that, These directional terms may be relative concepts, and they are used for relative description and clarification, which may vary accordingly depending on the orientation in which the components are placed in the figures.
  • connection should be understood in a broad sense.
  • connection may be a fixed connection, a detachable connection, or an integrated body; it may be directly connected, or Can be indirectly connected through an intermediary.
  • electrical connection may be a direct electrical connection or an indirect electrical connection through an intermediate medium.
  • Embodiments of the present application provide a charging system.
  • the charging system includes electronics.
  • the electronic device may include a mobile phone (mobile phone), a tablet computer (pad), a computer with wireless transceiver function, smart wearable products (for example, smart watches, smart bracelets), virtual reality (virtual reality, VR) terminal equipment, augmented Reality (augmented reality AR) terminal devices and other devices have devices that need to be charged.
  • the above-mentioned electronic devices may also be electronic products such as rechargeable electric vehicles, rechargeable household small electrical appliances (such as soymilk machines, sweeping robots), and unmanned aerial vehicles.
  • the embodiments of the present application do not specifically limit the specific form of the above electronic device. For the convenience of description, the following description is made by taking the electronic device 01 as a mobile phone as shown in FIG. 1a as an example.
  • the above-mentioned charging system further includes an adapter 02 as shown in FIG. 1a.
  • the adapter 02 can be electrically connected to the external interface 03 of the electronic device 01 through a cable.
  • the adapter 02 can convert 220V alternating current into direct current (eg, 10V, 4A electrical signal) according to the requirement of charging power, and transmit the direct current to the electronic device 01 to supply power to the electronic device 01 .
  • the above-mentioned adapter 02 may adopt a flyback converter (flyback converter) topology.
  • the above-mentioned electronic device 01 takes a mobile phone as an example, as shown in FIG. 1 b , it mainly includes a display panel (DP) 10 .
  • the display screen 10 can be a liquid crystal display (liquid crystal display, LCD) screen, or an organic light emitting diode (organic light emitting diode, OLED) display screen. This application does not limit this.
  • the above electronic device 01 further includes a middle frame 11 and a casing 12 as shown in FIG. 1b.
  • the display screen 10 and the casing 12 are located on two sides of the middle frame 11 respectively, and are connected to the middle frame 11 .
  • the middle frame 11 includes a carrier board 110 and a frame 111 surrounding the carrier board 110 .
  • the electronic device 01 may further include a printed circuit board (PCB) and a battery 13 disposed on a side surface of the carrier board 110 facing the housing 12 .
  • the above-mentioned electronic device 01 may further include the RSC circuit 20 disposed on the PCB.
  • the RSC circuit 20 can withstand a high input-output voltage difference, and has a high voltage conversion efficiency (for example, the conversion efficiency can be above 97%), so it can be used for high-power charging (ie, fast charging) to the battery 13, To improve the charging speed of the electronic device 01.
  • the RSC circuit 20 has an input terminal Ip1 and an output terminal Op1 .
  • the input terminal Ip1 is electrically connected to the external interface 03 of the electronic device 01
  • the output terminal Op1 is electrically connected to the battery 13 .
  • the RSC circuit 20 can be used to step down the input voltage V in transmitted from the external interface 03 to the input terminal Ip1 of the RSC circuit 20 to generate an output voltage V out , and apply the above-mentioned output voltage V out to the output terminal Op1 of the RSC circuit 20 .
  • the battery 13 is supplied with the first charging current I1 to the battery 13 .
  • the above-mentioned electronic device 01 further includes a processor 22, for example, a system on chip (system on chip, SOC).
  • the processor 22 can be electrically connected to the battery 13 and the RSC circuit 20 , and the processor 22 can detect the charging current of the battery 13 .
  • the external interface 03 of the electronic device 01 is provided with a D+ pin and a D- pin.
  • the D+ and D- pins may electrically connect the adapter 02 to the processor 22, or a detection chip capable of detecting the adapter 02 class.
  • the processor 22 or the above-mentioned detection chip can detect the type of the adapter 02 based on the charging protocol, such as the BC1.2 charging protocol.
  • the output power of the adapter 02 may be 40W (ie, 10V, 4A).
  • the input power of the RSC circuit 20 is 40W (ie, 10V, 4A).
  • the above-mentioned battery 13 is usually a lithium battery, and the charging voltage of the lithium battery can be in the range of 3.5V to 4.4V.
  • the above-mentioned RSC circuit 20 can convert the above-mentioned input voltage V in (10V) into an output voltage V out (5V).
  • the processor 22 can communicate with the adapter 02 through the D+ pin and the D- pin in the external interface 03, so that the output power of the adapter 02 can be reduced according to the reduction of the charging current of the battery 13, so that The first charging current I1 provided by the RSC circuit 20 to the battery 13 can be gradually decreased as the charging time increases.
  • the charging current of the battery 13 will be less than the preset current (eg, 1A). At this time, it is not necessary to quickly charge the above-mentioned battery 13 , and it is necessary to use low-power charging to perform standard charging of the battery 13 . Since the RSC circuit 20 is an open-loop circuit, when the charging power is small, the output current of the RSC circuit 20 becomes smaller, and the detection accuracy of the charging current by the processor 22 decreases, which is not conducive to the precise adjustment of the charging current. In addition, when the charging power is small, the conversion efficiency of the RSC circuit 20 may decrease. In this case, as shown in FIG. 2 , the above-mentioned electronic device 01 may further include a Buck circuit 21 that is electrically connected to the processor 22 . The step-down (Buck) circuit 21 can perform the above-mentioned low-power charging on the battery 13 .
  • the preset current eg, 1A
  • the step-down circuit 21 has an input end Ip2 and an output end Op2 , the input end Ip2 is electrically connected to the external interface 03 of the electronic device 01 , and the output end Op2 is electrically connected to the battery 13 .
  • the Buck circuit 21 can be used to step down the voltage transmitted from the external interface 03 to the input terminal Ip2 of the step-down circuit 21 , and then apply it to the battery 13 through the output terminal Op2 of the step-down circuit 21 , and provide the second charging current I2 to the battery 13 .
  • the second charging current I2 is smaller than the above-mentioned first charging current I1, that is, I2 ⁇ I1, so that low-power charging can be realized.
  • the output power of the adapter 02 may be 5W (eg, 5V, 1A).
  • the input power of the Buck circuit 21 can also be 5W (ie, 5V, 1A).
  • the duty cycle of the signal is adjusted to provide the battery with the reduced voltage, so that the current provided by the Buck circuit 21 to the battery 13 is the same or approximately the same as the second charging current I2 described above.
  • both the RSC circuit 20 and the Buck circuit 21 are electrically connected to the processor 22 .
  • the processor 22 detects that the charging current of the battery 13 is greater than the preset current (for example, 1A)
  • the processor 22 can control the RSC circuit 20 to be in a working state, so that the above-mentioned first step can be provided to the battery 13 through the RSC circuit 20 A charging current I1.
  • the processor 22 detects that the charging current of the battery 13 is less than or equal to a preset current (for example, 1A)
  • the processor 22 can control the Buck circuit 21 to be in a working state, so that the above-mentioned first step can be provided to the battery 13 through the Buck circuit 21.
  • the above-mentioned electronic device 01 may further include a bidirectional cut-off switch SW.
  • the gate terminal of the bidirectional cutoff switch SW is electrically connected to the processor 22, the first pole a of the bidirectional cutoff switch SW is electrically connected to the external interface 03, and the second pole b of the bidirectional cutoff switch SW is electrically connected to the RSC circuit 20 and Buck circuit electrical connection.
  • the bidirectional cutoff switch SW is used to disconnect the external interface 03 from the RSC circuit 20 and the Buck circuit when the processor 22 outputs the cutoff signal.
  • the above-mentioned bidirectional cut-off switch tube SW may include two switch tubes.
  • the parasitic diodes of the two switches are set in reverse.
  • the gates g of the above two switching transistors are electrically connected, and serve as gate terminals of the bidirectional cut-off switch transistor SW.
  • the gate end of the bidirectional cutoff switch SW can be electrically connected to the processor 22 , and the processor 22 controls the on and off of the bidirectional cutoff switch SW.
  • the gate end of the bidirectional cut-off switch SW receives the cut-off signal output by the processor 22 , two switches in the bidirectional cut-off switch SW are both turned off. According to the unidirectional conduction characteristic of the diode, when both switches in the bidirectional cut-off switch SW are cut off, the external interface 03 is disconnected from the RSC circuit 20 and the Buck circuit.
  • the processor 22 can control the bidirectional cut-off switch SW is turned off, so as to avoid the phenomenon that the battery 13 of the electronic device 01 is backflowed to the external charger.
  • the processor 22 can control the bidirectional cut-off switch SW to be turned off, so that the external charger or adapter 02 will not continue to Device 01 is charged.
  • the processor 22 in the electronic device 01 can be connected to an external device (such as a power bank, a mobile phone, a smart watch) through the D+ pin and the D- pin of the external interface 03. connect.
  • an external device such as a power bank, a mobile phone, a smart watch
  • the processor 22 can control the bidirectional cutoff switch SW to be turned on.
  • the electronic device 01 can reversely charge the above-mentioned external device.
  • the structure and working process of the above-mentioned RSC circuit 20 will be illustrated in detail below.
  • the RSC circuit 20 may include a resonant inductor L r and an N-phase switched capacitor (SC) circuit 201 .
  • N N ⁇ 2
  • N is an integer.
  • the resonant inductor Lr has a first end a1 and a second end a2.
  • the first terminal a1 of the resonant inductor L r can be used as the output terminal Op1 of the above-mentioned RSC circuit 20 , and is electrically connected to the load (eg, battery) 30 .
  • the first end a1 of the resonant inductor L r is used to supply power to the load 30 .
  • the input terminals of the N-phase SC circuit 201 are connected in parallel, as the input terminal Ip1 of the RSC circuit 20 , it is electrically connected to the same power source, that is, the adapter 02 .
  • the output end of the N-phase SC circuit is connected in parallel and is electrically connected to the second end a2 of L r of the resonant inductor. In this way, after the output terminals of the N-phase SC circuit 201 are connected in parallel, one of the above-mentioned resonant inductors L r is connected in series to supply power to the load 30 .
  • the battery is used as the load 30 as an example for description.
  • the application does not limit the types of loads.
  • the above-mentioned load 30 may also be some control chips, for example, a power management unit (power management unit, PMU), a central processing unit (central processing unit, CPU), or the above-mentioned SOC Wait.
  • the above-mentioned RSC circuit 20 may further include an output capacitor Co.
  • a first end of the electrical terminals a1 and the output capacitor Co is connected to resonant inductor L r, and the other end is grounded (GND).
  • each phase SC circuit 201 may include multiple switch tubes and at least one resonant capacitor C r .
  • each phase SC circuit 201 in FIG. 3 may include one resonant capacitor C r and four switching transistors Q.
  • connection mode of each component in the SC circuit 201 of each phase of the RSC circuit 20 shown in FIG. 3 and the voltage conversion process of the RSC circuit 20 will be described in detail below.
  • the first SC circuit 201_1 includes a resonant capacitor C r1 and four switching transistors, which are the first switching transistor Q 11 , the second switching transistor Q 12 , The third switch transistor Q 13 and the fourth switch transistor Q 14 .
  • the first end b1 of the capacitor C r1 is electrically connected.
  • a first electrode of the second switch Q e.g., a drain d
  • a second pole of the first switch Q 11 12 e.g., the source s
  • Switch Q second pole e.g., the source s
  • a2 is electrically connected to the second end of the resonant inductor L r.
  • a first electrode of the third switching transistor Q e.g., a drain d
  • a second electrode 13 e.g., the source s
  • the second electrode of the third switching transistor Q 13 e.g. , the source s
  • the second end b2 of the resonant capacitor C r1 is electrically connected to the second end b2 of the resonant capacitor C r1 .
  • a first electrode of the fourth switching transistor Q (e.g., a drain d) 14 of the third switch Q second pole (e.g., the source s) 13 is electrically connected to the fourth switching transistor Q 14 of the second pole (e.g. , the source s) is grounded.
  • the gates (gate, g) of the first switch transistor Q 11 and the third switch transistor Q 13 are used to receive the same driving signal, so that the first switch transistor Q 11 and the third switch transistor Q 13 can simultaneously conduct Pass, or, cut off at the same time.
  • the gates g of the second switch Q 12 and the fourth switch Q 14 are used to receive the same driving signal, so that the second switch Q 12 and the fourth switch Q 14 can be turned on or turned off at the same time.
  • the drive signal of the first switch Q g 11 gate and the second gate switch Q g 12 receives the inverted signal of equal amplitude. In this case, when the first switch Q 11 and the third switch Q 13 are turned on, the second switch Q 12 and the fourth switch Q 14 are turned off. Alternatively, when the first switch transistor Q 11 and the third switch transistor Q 13 are turned off, the second switch transistor Q 12 and the fourth switch transistor Q 14 are turned on.
  • the RSC circuit 20 may not include a controller (not shown in the figure), and the controller can provide the gate of the above-mentioned switch tube with a pulse width with adjustable duty cycle as required.
  • a pulse width modulation (PWM) signal is used as the above driving signal to control the on and off of the switch.
  • PWM pulse width modulation
  • the above-mentioned RSC circuit 20 may be fabricated in a chip, and the above-mentioned controller may be integrated in the chip.
  • the above-mentioned switch transistors for example, the first switch transistor Q 11 , the second switch transistor Q 12 , the third switch transistor Q 13 and the fourth switch transistor Q 14 can be It is an N-type metal oxide semiconductor (negative channel metal oxide semiconductor, NMOS) switch.
  • the first electrode of the switch tube is the drain electrode d
  • the second electrode is the source electrode s.
  • each of the above-mentioned switch transistors may be a P-type metal oxide semiconductor (positive channel metal oxide).
  • the first electrode of the switch tube may be the source electrode s, and the second electrode may be the drain electrode d.
  • the switch tube is an N-type switch tube as an example for illustration.
  • the diode D' and the capacitor C' connected in parallel between the drain d and the source s of the switch tube are respectively the parasitic diode and the parasitic diode formed when the switch tube is fabricated. capacitance.
  • the above-mentioned parasitic diodes and parasitic capacitances do not affect the on and off of the switch.
  • the SC circuit of each phase in the RSC circuit 20 shown in FIG. 4 can implement a 2:1 voltage conversion process, that is, the ratio of the input voltage V in to the output voltage V out of each phase SC circuit is 2:1.
  • the following describes the voltage conversion process of the one-phase SC circuit 201 by taking the first SC circuit 201_1 as an example.
  • the first switch Q 11 and the third switch Q 11 are controlled.
  • Q 13 is turned on, and controls the second switch Q 12 and the fourth switch Q 14 to be turned off.
  • V in 10V
  • the input current I in forms a charging loop from the first switch tube Q 11 to the resonant capacitor C r1 , and then from the third switch tube Q 13 to the resonant inductor L r and the output capacitor Co .
  • the input current I in can charge the resonant capacitor C r1 and the output capacitor Co in the above-mentioned charging loop.
  • the above-mentioned resonant inductor L r can hinder the change of the current in the charging loop, so that the electric quantity on the resonant capacitor C r1 and the output capacitor Co increases slowly. It can be seen from the above that in the first half cycle (0 ⁇ T/2) of the resonant cycle, the resonant inductor L r and the resonant capacitor C r1 in the RSC circuit 20 can be used for charging.
  • FIG. 5b the equivalent circuit of the structure shown in FIG. 5a is shown in FIG. 5b, and it can be seen that the resonance capacitor C r1 is connected in series with the output capacitor Co.
  • V in V_C r1 +V out (1)
  • the second switch transistors Q 12 , a fourth switch transistor Q 14 is turned on, and controls the first switching transistor Q 11, Q 13 of the third switch is turned off.
  • the resonant capacitor C r1 is discharged, and the discharge current I out flows from the second switch tube Q 12 to the resonant inductor L r , then to the battery 13 , and then to the fourth switch tube Q 14 to form a discharge loop to charge the battery 13 .
  • the output capacitor Co also discharges the battery 13 in this discharge circuit.
  • the resonant inductor L r can hinder the change of the current in the discharge loop, so that the electric quantity on the resonant capacitor C r1 and the output capacitor Co decreases slowly. It can be seen from the above that, in the second half cycle of the resonant cycle (T/2 ⁇ T), the resonant inductor L r and the resonant capacitor C r1 in the RSC circuit 20 can also be used for discharging to supply power to the load 30 .
  • the resonant inductor L r hinders the change of the current in the charging loop, so that the power on the resonant capacitor C r1 and the output capacitor Co increases slowly.
  • the resonant inductance L r hinders the change of the current in the discharge loop, so that the electric quantity on the resonant capacitor C r1 and the output capacitor Co decreases slowly. Therefore, by setting the resonant capacitor C r1 in the RSC circuit 20 , the resonant capacitor C r1 and the output capacitor Co can be buffered during the charging and discharging process, so as to avoid large current spikes caused by hard charging of the battery and reduce electromagnetic interference. (electromagnetic interference, EMI) occurrence probability.
  • electromagnetic interference electromagnetic interference
  • V_C r1 V out (2)
  • the switch array formed by the switch tubes of the SC circuit 201 of each phase alternately forms a charging loop and a discharging loop in a specific manner, so that the resonant capacitor Cr and the output capacitor Co are adjusted in the charging loop.
  • the charging is performed, and the battery 13 serving as the load is discharged through the resonant capacitor Cr and the output capacitor Co in the discharge circuit.
  • the voltage conversion is realized during the charging and discharging process of the resonance capacitor Cr and the output capacitor Co, so that the voltage output by the RSC circuit 20 can charge the battery 13 .
  • the RSC circuit 20 provided in the embodiment of the present application includes at least a two-phase SC circuit 201, such as a first SC circuit 201_1 and a second SC circuit 201_2.
  • a two-phase SC circuit 201 such as a first SC circuit 201_1 and a second SC circuit 201_2.
  • the structure and control method of the adjacent first SC circuit 201_1 and the second SC circuit 201_2 in the RSC circuit 20 will be illustrated below by way of example.
  • the first and second SC SC circuit 201_1 circuit 201_2 the circuit connection of the same switch, e.g., a first SC circuit 201_1 in FIG. 7a a first switch transistor Q 11
  • the phase difference with the driving signal received by the gate g of the first switching transistor Q 21 in the second SC path 201_2 is 0°, that is, the driving signals received by the gate g of the above-mentioned switching transistors may all be as shown in FIG. 8 .
  • the phase difference of the driving signal received by the gate g of the second switch transistor Q 12 in the first SC circuit 201_1 and the second switch transistor Q 22 in the second SC circuit 201_2 in FIG. 7a is 0°, that is, each of the above
  • the driving signals received by the gate g of the switch tube may all be the driving signal VG2 shown in FIG. 8 .
  • the driving signal VG1 and the driving signal VG2 are equal-amplitude inverted signals.
  • a first SC circuit 201_1 the first switch Q 11, Q 13 of the third switch is turned on, the second switch tube Q 12 and the fourth switch tube Q 14 are turned off.
  • the first switch Q 21 and the third switch Q 23 are turned on, and the second switch Q 22 and the fourth switch Q 24 are turned off.
  • Ip1 RSC input circuit 20 receives an input current I in charging, the charging procedure is as above, will not be repeated herein with respect to each of the SC circuit 201 of the resonant capacitor C r.
  • the second switch transistor Q 12 and the fourth switch transistor Q 14 are turned on, and the first switch transistor Q 11 , the third switch tube Q13 is turned off.
  • the second switch Q 22 and the fourth switch Q 24 are turned on, the first switch Q 21 and the third switch Q 23 are turned off, and the resonant capacitor C r in the SC circuit 201 of each phase moves to The battery 13 is discharged, and the discharge process is the same as described above, and will not be repeated here.
  • the on and off states of the switches in the SC circuit 201_i other than the first SC circuit 201_1 and the second SC circuit 201_2, and the charging and discharging process of the SC circuit 201_i are the same as described above, It will not be repeated here.
  • 3 ⁇ i ⁇ N, i is an integer.
  • any adjacent two-phase SC circuits 201 in the RSC circuit 20, such as the first SC circuit 201_1 and the second SC circuit 201_2, have switch tubes with the same circuit connection, for example, a first driving signal VG1 SC circuit 201_1 in FIG. 9a in the gate of the first switch Q g 11 received, and the second path 201_2 SC in the gate of the first switch Q g 21 received driving signal VG2
  • the phases are 180° out of phase as shown in Figure 10.
  • the first driving signal VG2 SC circuit 201_1 in FIG. 9a in the gate of the second switch Q g 12 received, and the second path 201_2 SC in the gate of the second switch Q g 22 received drive The phase difference of the signal VG1 is 180°.
  • the first switch transistor Q 11 and the third switch transistor Q 13 are turned on, and the second switch transistor Q 12 and the fourth switch tube Q 14 are turned off.
  • the input terminal Ip1 of the RSC circuit 20 receives the input current I in to charge the resonant capacitor C r1 in the first SC circuit 201_1 .
  • the charging process is the same as described above, and will not be repeated here.
  • the second switch transistor Q 22 and the fourth switch transistor Q 24 are turned on, and the first switch transistor Q 21 and the third switch transistor Q 23 are turned off.
  • the resonant capacitor C r2 in the second SC circuit 201_2 discharges to the battery 13 , and the discharge process is the same as that described above, which will not be repeated here.
  • the second switch transistor Q 12 and the fourth switch transistor Q 14 are turned on, and the first switch transistor Q 11 , the third switch tube Q13 is turned off.
  • the resonant capacitor C r1 in the first SC circuit 201_1 is discharged to the battery 13 , and the discharging process is the same as that described above, which will not be repeated here.
  • the first switch Q 21 and the third switch Q 23 are turned on, and the second switch Q 22 and the fourth switch Q 24 are turned off.
  • the input terminal Ip1 of the RSC circuit 20 receives the input current I in to charge the resonant capacitor C r2 in the second SC circuit 201_2 .
  • the charging process is the same as that described above, and will not be repeated here.
  • the output power of the adapter 02 is 40W, and the input voltage V in applied by the adapter 02 to the RSC circuit 20 is 10V as shown in FIG. 10 as an example, after the voltage conversion of the RSC circuit 20, the output of the RSC circuit 20 As shown in FIG. 10 , the voltage V out can be about 4.9V, which is close to 5V. Therefore, the voltage conversion efficiency can reach about 98%. In addition, the output current I out is about 9A, which is close to 10A.
  • a first SC circuit 201_1, the resonant capacitor C r1 current I_C r1, and a second SC circuit 201_2, the current of the resonant capacitor C r2 I_C r2 are in the form of a sine wave flows through the flow shown in FIG. 10, so that It can be explained that each phase SC circuit 201 can realize resonance operation.
  • the input voltage I in is in the form of a steamed bun.
  • an input capacitor (not shown in the figure) can be set at the input end of the RSC circuit 20 , and one end of the input capacitor can be electrically connected to the input end Ip1 of the RSC circuit 20 . connected, and the other end is grounded.
  • the on and off states of the switches in the ith SC circuit 201_i when i ⁇ N, and i is an odd number, the on and off states of the switches in the ith SC circuit 201_i, and the SC circuit
  • the charging and discharging process of 201_i is the same as that of the first SC circuit 201_1.
  • the on and off states of the switches in the i-th SC circuit 201_i and the charging and discharging process of the SC circuit 201_i are the same as those of the second SC circuit 201_2 , which will not be repeated here.
  • the gates g of the first switch transistor Q 11 and the third switch transistor Q 13 in the first SC circuit 201 receive the same driving signals, for example, the driving signals shown in FIG. 10 .
  • VG1 The driving signals received by the gates g of the second switching transistor Q 12 and the fourth switching transistor Q 14 are the same, for example, the driving signals VG2 shown in FIG. 10 .
  • the driving signal VG1 and the driving signal VG2 are equal-amplitude inverse signals, that is, the phase difference between the two is 180°.
  • the gates g of the second switch Q 21 and the fourth switch Q 14 in the first SC circuit 201_1 and the first switch Q 21 and the third switch Q 23 in the second SC circuit 201_2 receive the The driving signals are the same, for example, the driving signals VG2 shown in FIG. 10 .
  • the RSC circuit 20 may further include a first control signal terminal S1 and a second control signal terminal S2, the first control signal terminal S1 is used to output the above-mentioned driving signal VG1, and the first control signal terminal S1 is used to output the above-mentioned driving signal VG1.
  • the two control signal terminals S2 are used for outputting the above-mentioned driving signal VG2.
  • the gates g of the first switch Q 11 and the third switch Q 13 in the first SC circuit 201_1 and the second switch Q 21 and the fourth switch Q 24 in the second SC circuit 201_2 Both are electrically connected to the first control signal terminal S1.
  • the gates g of the second switch transistor Q 21 and the fourth switch transistor Q 14 in the first SC circuit 201_1 and the first switch transistor Q 21 and the third switch transistor Q 23 in the second SC circuit 201_2 may all be the same as the The second control signal terminal S2 is electrically connected. In this way, in the SC circuit 201, there is no need to separately set a signal control terminal to the gate of each switch tube, so as to achieve the purpose of simplifying the circuit structure.
  • any adjacent two-phase SC circuits 201 in the RSC circuit 20 is 0° or 180°. instruction of.
  • any adjacent two-phase SC circuits 201 in the RSC circuit 20, such as the first SC circuit 201_1 and the second SC circuit 201_2 have switch tubes with the same circuit connection (for example, in FIG. 9a ).
  • the voltage conversion process of the RSC circuit 20 can be obtained in the same way, which will not be repeated here.
  • the current flowing through the resonant capacitor in each phase SC circuit 201 can achieve resonance, and the voltage conversion efficiency of the RSC circuit 20 can reach about 98%.
  • the resonant capacitor C r N SC phase parallel circuit 201 and then in series with said resonant inductor L r. Since the parallel resonant capacitor C r with N SC circuit 201, and thus the capacitance of the resonant capacitor C r SC circuit 201 is an N-phase resonant capacitor C tr is the total RSC circuit 20 and.
  • the total resonant inductance L tr and the total resonant capacitance C tr of the RSC circuit 20 satisfy the following formula:
  • fr is the resonant frequency of the current flowing through the resonant capacitor in the SC circuit 201 of each phase.
  • the resonance frequency is the same as the frequency of the driving signal for controlling the gate g of the switching transistor, that is, the switching frequency (eg, 500 KHz) of the RSC circuit 20 .
  • the total resonant inductor L tr, total resonant capacitor C tr, and the above formula can be calculated circuit 201 the capacitance value of the resonant capacitor C r of the respective phases SC, and a resonance The inductance value of the inductor L r.
  • the input power of the RSC circuit 20 is 40W (10V, 4A)
  • the output power is 40W (5V, 8A)
  • the switching frequency is 500KHz
  • the inductance value of the resonant inductor L r is the same as the inductance value of the total resonant inductor L tr of the RSC circuit 20 . Therefore, the purpose of reducing the number of resonant inductances can be achieved.
  • circuit 201 for each phase of the capacitance value of SC single resonant capacitor C r is the more reduced. It is possible to effectively reduce the size of the individual circuit 201 resonant capacitor C r SC each phase, which can effectively reduce the RSC circuit board 20 occupy an area conducive to compact design of the electronic device.
  • the present application does not limit the size of the phase number N of the SC circuits 201 connected in parallel in the RSC circuit 20 .
  • the performance requirements for the components in the SC circuit 201 of each phase such as the resonant capacitor and the switch tube, are lower, but the element in the RSC circuit 20 is lower.
  • the higher the performance requirements of the components in the SC circuit 201 of each phase are, the smaller the number of components in the RSC circuit 20 is.
  • the RSC circuit 20 may include a resonant inductor L r and an N-phase SC circuit 201 .
  • the connection mode of the resonant inductor L r and the N-phase SC circuit is the same as that described above, and will not be repeated here.
  • each phase SC circuit 201 may include multiple switching transistors and two resonant capacitors C r , which are respectively a first resonant capacitor C 1r and a second resonant capacitor C 2r . As shown in FIG.
  • the SC circuit 201_1 includes a first resonant capacitor C 1r1 , a second resonant capacitor C 2r1 , a flying capacitor C f1 , a first switch transistor Q 11 , a second resonant capacitor C 1r1 , and a second Switch tube Q 12 , third switch tube Q 13 , fourth switch tube Q 14 , fifth switch tube Q 15 , sixth switch tube Q 16 , seventh switch tube Q 17 , eighth switch tube Q 18 , ninth switch tube The tube Q 19 and the tenth switch tube Q 110 .
  • the above-mentioned switch tube may be an NMOS tube or a PMOS tube.
  • the following description is made by taking the above-mentioned switch tube as an NMOS tube as an example.
  • each switch can be: a first pole of the first switch Q (e.g., a drain d) 11 as an RSC Ip1 20 of the circuit input, the first switch Q 11
  • the second electrode e.g., the source electrode s
  • a first electrode of the second switch Q e.g., a drain d
  • a second pole of the first switch Q 11 12 e.g., the source s
  • a first electrode of the third switching transistor Q e.g., a drain d
  • a second switching transistor Q 12 e.g., the source s
  • a second electrode 13 e.g., the source s
  • a third switch Q second pole (e.g., the source s) 13 is electrically connected to a first end of the second resonant capacitor C 2r1.
  • a first electrode of the fourth switching transistor Q (e.g., a drain d) 14 of the third switch Q second pole (e.g., the source s) 13 is electrically connected to the fourth switching transistor Q 14 of the second pole (e.g. , the source s) is electrically connected to the second end a2 of the resonant inductor L r.
  • the fifth switch Q first pole e.g., the drain D circuit 15 as an input 20 of the RSC Op1 resonant inductor L r and a second end electrically connected to a2
  • the fifth switch of the second electrode 15 of the transistor Q e.g, source s
  • the sixth switching transistor Q 16 of the first pole e.g., the drain d
  • the fifth switching transistor Q 15 of the second pole e.g., the source s
  • a second electrode e.g. , the source s
  • Seventh switching transistor Q first pole e.g., the drain d. 17 of the fifth switching transistor Q 15 of the first pole (e.g., the drain d) is electrically connected.
  • a first terminal and a second electrode of the second switching transistor Q flying capacitors C f1 12 e.g., the source s
  • An eighth switch Q first pole e.g., the drain D
  • a seventh switch Q 17 of the second pole e.g., the source s
  • is electrically connected to the eighth switching transistor Q 18 of the second electrode is grounded.
  • a first electrode of the ninth switching transistor Q 19 e.g., a drain d
  • the fifth switch Q first pole e.g., the drain d
  • a tenth switch Q first pole e.g., the drain d
  • a ninth switching transistor Q 19 of the second electrode 110 is electrically connected to the tenth electrode of the second switch Q 110 (e.g. , the source s) is grounded.
  • the gates g of the first switch transistor Q 11 , the third switch transistor Q 13 , the fifth switch transistor Q 15 , the eighth switch transistor Q 18 and the ninth switch transistor Q 19 are used to receive the same driving signal, so that the The first switch transistor Q 11 , the third switch transistor Q 13 , the fifth switch transistor Q 15 , the eighth switch transistor Q 18 and the ninth switch transistor Q 19 may be turned on at the same time, or turned off at the same time.
  • the second switch transistor Q 12 , the fourth switch transistor Q 14 , the sixth switch transistor Q 16 , the seventh switch transistor Q 17 , and the tenth switch transistor Q 110 are used to receive the same driving signal, so that the second switch transistor Q 16 is used to receive the same driving signal.
  • a first drive signal of the switching transistor Q g 11 gate and the second gate switch Q g 12 receives the inverted signal of equal amplitude.
  • the first-phase SC circuit 201_1 when the first switch Q 11 , the third switch Q 13 , the fifth switch Q 15 , the eighth switch Q 18 and the ninth switch Q 19 are turned on At this time, the second switch transistor Q 12 , the fourth switch transistor Q 14 , the sixth switch transistor Q 16 , the seventh switch transistor Q 17 and the tenth switch transistor Q 110 are turned off.
  • the first switch transistor Q 11 , the third switch transistor Q 13 , the fifth switch transistor Q 15 , the eighth switch transistor Q 18 and the ninth switch transistor Q 19 are off, the second switch transistor Q 12 and the fourth switch transistor Q 12 are turned off.
  • the transistor Q 14 , the sixth switch transistor Q 16 , the seventh switch transistor Q 17 and the tenth switch transistor Q 110 are turned on.
  • the SC circuit 201 of each phase in the RSC circuit 20 shown in FIG. 13 can implement a 4:1 voltage conversion process, that is, the ratio of the input voltage V in to the output voltage V out of each phase SC circuit 201 is 4:1.
  • the following describes the voltage conversion process of the one-phase SC circuit 201 by taking the first-phase SC circuit 201_1 as an example.
  • the first switch Q 11 and the third switch Q 11 are controlled.
  • Q 13 , the fifth switch Q 15 , the eighth switch Q 18 and the ninth switch Q 19 are turned on, and control the second switch Q 12 , the fourth switch Q 14 , the sixth switch Q 16 , the seven switch and a tenth switch transistor Q 17 Q 110 is turned off.
  • V in 10V
  • the input current I in forms a charging loop from the first switching transistor Q 11 to the first resonant capacitor C 1r1 , and then from the fifth switching transistor Q 15 to the resonant inductor L r and the output capacitor Co .
  • the input current I in can charge the first resonant capacitor C 1r1 and the output capacitor Co in the above-mentioned charging loop.
  • the above-mentioned resonant inductor L r hinders the change of the current in the charging loop, so that the electric quantity on the first resonant capacitor C 1r1 and the output capacitor Co increases slowly.
  • the input current I in also charges the second resonant capacitor C 1r1 and the flying capacitor C f1 through the ninth switch Q 19 , the third switch Q 13 and the eighth switch Q 18 .
  • FIG. 14b the equivalent circuit of the structure shown in FIG. 14a is shown in FIG. 14b, and it can be seen that the first resonance capacitor C 1r1 is connected in series with the output capacitor Co.
  • the flying capacitor C f1 is connected in series with the second resonance capacitor C 1r2 and then connected in parallel with the output capacitor Co.
  • V in -V_C 1r1 V out (6)
  • flying voltage across the capacitor C f1 V_C f1 satisfies the following equation between the voltage across the capacitor V_C 1r2 and the output voltage V out Co second resonant capacitor C 1r2 across:
  • V_C f1 -V_C 1r2 V out ( 7)
  • the second switch transistors Q 12 , The fourth switch transistor Q 14 , the sixth switch transistor Q 16 , the seventh switch transistor Q 17 and the tenth switch transistor Q 110 are turned on, and control the first switch transistor Q 11 , the third switch transistor Q 13 , and the fifth switch transistor Q 15 , the eighth switch tube Q 18 and the ninth switch tube Q 19 are turned off.
  • the first resonant capacitor C 1r1 is discharged, and the discharge current I out flows to the flying capacitor C f1 through the second switch tube Q 12 .
  • the discharge current I out of the flying capacitor C f1 flows to the resonant inductor L r and the battery 13 through the seventh switch transistor Q 17 to form a discharge loop.
  • the second resonant capacitor C 1r2 discharges the battery 13 through the fourth switch transistor Q 14 to charge the battery 13 .
  • the output capacitor Co also discharges the battery 13 in this discharge circuit.
  • the resonant inductor L r can be resistant to change in the discharge current circuit, such that a first resonant capacitor C 1r1, and a second resonant capacitor C 1r2 reduce the charge on the output capacitor Co slowly.
  • V_C 1r1 -V_C f1 V out (8)
  • V_C 1r2 between the voltage and the output voltage V out across the capacitor C 1r2 second resonant capacitor Co across:
  • V_C 1r2 V out (9)
  • the RSC circuit 20 provided in the embodiment of the present application includes at least a two-phase SC circuit 201 , for example, the control methods of the first SC circuit 201_1 and the second SC circuit 201_2 can be the same as the example.
  • the first and second SC SC circuit 201_1 circuit 201_2 the circuit connection of the same switch, e.g., a first SC circuit 201_1 in FIG.
  • the phase difference with the driving signal received by the gate g of the first switching transistor Q 21 in the second SC path 201_2 is 0°, that is, the driving signals received by the gate g of the above-mentioned respective switching transistors may all be the above-mentioned driving signal VG1 .
  • the phase difference of the driving signal received by the gate g of the second switch transistor Q 12 in the first SC circuit 201_1 and the second switch transistor Q 22 in the second SC circuit 201_2 in FIG. 13 is 0°, that is, each of the above
  • the driving signals received by the gate g of the switch tube may all be the above-mentioned driving signals VG2. In this case, the charging and discharging process of the RSC circuit 20 can be obtained in the same way, which will not be repeated here.
  • the first circuit 20 of SC circuit RSC SC circuits 201_1 and 201_2 in the second, the same circuit connection switch, e.g., FIG. 16 and Q 11 Q 21 , or Q 12 and Q 22 , or Q 13 and Q 23 , or Q 14 and Q 24 , or Q 15 and Q 25 , or Q 16 and Q 26 , or Q 17 and Q 27 , or Q 18 and Q 28 , or Q 19 and Q 29 , or the gate g of Q 110 and Q 210
  • the first switch transistor Q 11 , the third switch transistor Q 13 , the fifth switch transistor Q 15 , the eighth switch transistor Q 18 and the ninth switch transistor Q 19 in the first SC circuit 201_1 are the same as the second switch transistor Q 11 .
  • the driving signals received by the gates g of the second switch transistor Q 22 , the fourth switch transistor Q 24 , the sixth switch transistor Q 26 , the seventh switch transistor Q 27 and the tenth switch transistor Q 210 in the SC circuit 201_2 are the same, For example, both are the drive signals VG1 shown in FIG. 10 .
  • the second switch Q 12 , the fourth switch Q 14 , the sixth switch Q 16 , the seventh switch Q 17 and the tenth switch Q 110 in the first SC circuit 201_1 are the same as the second SC circuit
  • the drive signals received by the gates g of the first switch transistor Q 21 , the third switch transistor Q 23 , the fifth switch transistor Q 25 , the eighth switch transistor Q 28 and the ninth switch transistor Q 29 in 201_2 are the same, for example, all is the drive signal VG2 shown in FIG. 10 .
  • the same SC circuit for example, the first switch transistor Q 11 , the third switch transistor Q 13 , the fifth switch transistor Q 15 , the seventh switch transistor Q 17 and the ninth switch transistor Q 19 in the first SC circuit 201
  • the driving signals received by the gates g of are the same, for example, the above driving signals VG1.
  • the driving signals received by the gates g of the second switching transistor Q 12 , the fourth switching transistor Q 14 , the sixth switching transistor Q 16 , the seventh switching transistor Q 17 and the tenth switching transistor Q 110 are the same, for example, all of the above driving signals Signal VG2.
  • the driving signal VG1 and the driving signal VG2 are equal-amplitude inverse signals, that is, the phase difference between the two is 180°.
  • the RSC circuit 20 may further include a first control signal terminal S1 and a second control signal terminal S2, the first control signal terminal S1 is used to output the above-mentioned driving signal VG1, and the first control signal terminal S1 is used to output the above-mentioned driving signal VG1.
  • the two control signal terminals S2 are used for outputting the above-mentioned driving signal VG2.
  • the gates g of the first switch transistor Q 11 , the third switch transistor Q 13 , the fifth switch transistor Q 15 , the eighth switch transistor Q 18 and the ninth switch transistor Q 19 in the first SC circuit 201_1 are connected to the second SC
  • the gates g of the second switch transistor Q 22 , the fourth switch transistor Q 24 , the sixth switch transistor Q 26 , the seventh switch transistor Q 27 and the tenth switch transistor Q 210 in the circuit 201_2 are all connected to the first control signal terminal S1 electrical connection.
  • the gates g of the first switch transistor Q 21 , the third switch transistor Q 23 , the fifth switch transistor Q 25 , the eighth switch transistor Q 28 and the ninth switch transistor Q 29 in 201_2 are all electrically connected to the second control signal terminal S2 . connect. In this way, in the SC circuit 201, there is no need to separately set a signal control terminal to the gate of each switch tube, so as to achieve the purpose of simplifying the circuit structure.
  • the first SC circuit 201_1 and the second SC circuit 201_2 of the RSC circuit 20 switches with the same circuit connection (for example, Q 11 and Q in FIG. 16 ) 21 , or Q 12 and Q 22 , or Q 13 and Q 23 , or Q 14 and Q 24 , or Q 15 and Q 25 , or Q 16 and Q 26 , or Q 17 and Q 27 , or Q 18 and Q 28 , or Q 19 and Q 29 , or the gate g of Q 110 and Q 210 ) receives the driving signals that differ by 90°.
  • the voltage conversion process of the RSC circuit 20 can be obtained in the same way, which will not be repeated here.
  • the N first resonant capacitors C 1r and the N second resonant capacitors C 2r in the N-phase SC circuit 201 are connected in parallel, they are connected in series with the above-mentioned resonant inductor L r.
  • the capacitance value of the total resonant capacitor C tr of the RSC circuit 20 is the sum of the resonant capacitors in the N-phase SC circuit 201 .
  • the capacitance values of the first resonant capacitor C 1r of each phase SC circuit 201 are equal, the capacitance values of the second resonant capacitor C 2r are equal, and the capacitance value of the first resonant capacitor C 1r is the same as the capacitance value of the second resonant capacitor C 2r
  • the single resonance capacitance of each phase SC circuit 201 satisfies the following formula:
  • the resonance frequency f r RSC circuit 20 the total resonant inductor L tr, total resonant capacitor C tr, the above formula can be calculated, and each of the SC circuit 201 with a first resonant capacitor C 1r, second The capacitance value of the resonant capacitor C 2r , and the inductance value of the resonant inductor L r.
  • the inductance value of the resonant inductor L r is the same as the inductance value of the total resonant inductor L tr of the RSC circuit 20 . Therefore, the purpose of reducing the number of resonant inductances can be achieved.
  • the capacitance values of the single first resonance capacitor C 1r and the single second resonance capacitor C 2r in each phase SC circuit 201 decrease the more. Therefore, the size of the first resonant capacitor C 1r and the second resonant capacitor C 2r of each phase SC circuit 201 can be effectively reduced, thereby effectively reducing the board area of the RSC circuit 20 , which is beneficial to the design of miniaturized electronic equipment.
  • Example 1 illustrates the structure of the RSC circuit 20 and the charging and discharging process by taking the ratio of the input voltage V in to the output voltage V out of the RSC circuit 20 as 2:1 as an example.
  • Example 2 illustrates the structure of the RSC circuit 20 and the charging and discharging process by taking the ratio of the input voltage V in to the output voltage V out of the RSC circuit 20 as 4:1 as an example.
  • the application does not limit the voltage conversion ratio of the RSC circuit 20, for example, it can also be 3:1, 5:1, 6:1 or 8:1.
  • the structure can be obtained in the same way, that is, the RSC circuit 20 needs to include a resonant inductor L r and an N-phase SC circuit.
  • the plurality of resonant capacitors of the N-phase SC circuit may be connected in parallel with the resonant inductor L r in series.
  • the charging and discharging process of the RSC circuit 20 of the remaining voltage conversion ratios is the same as that described above, and will not be repeated here.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Les modes de réalisation selon la présente invention concernent un circuit de condensateurs à commutation résonante (RSC) et un dispositif électronique, lesquels se rapportent au champ technique des technologies de charge et servent à résoudre le problème d'aire d'occupation large d'un circuit de RSC en raison de l'accroissement du nombre de condensateurs et d'inductances dans le circuit de RSC destiné à réaliser une charge rapide. Le circuit de RSC comprend une inductance résonante et des circuits de condensateurs à commutation (SC) à N phases. Une première extrémité de l'inductance résonante est connectée électriquement à une charge. Des extrémités d'entrée des circuits de SC à N phases sont connectées en parallèle, et sont connectées électriquement à la même alimentation électrique. Des extrémités de sortie des circuits de SC à N phases sont connectées en parallèle, et sont connectées électriquement à une deuxième extrémité de l'inductance résonante. Le circuit de SC de chaque phase comprend au moins un condensateur résonant. Des condensateurs résonants des circuits de SC à N phases sont connectés en parallèle, et sont connectés en série à l'inductance résonante. La valeur de capacité du seul condensateur résonant dans le circuit de SC de chaque phase représente 1/M de la valeur de capacité des condensateurs résonants totaux du circuit de RSC. M est le nombre de condensateurs résonants dans le circuit de RSC qui sont connectés en parallèle.
PCT/CN2021/103356 2020-07-03 2021-06-30 Circuit de condensateurs à commutation résonante et dispositif électronique WO2022002096A1 (fr)

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