Direct-current voltage conversion circuit and direct-current voltage conversion system

Abstract

The application discloses a direct-current voltage conversion circuit and a direct-current voltage conversion system. The direct-current voltage conversion circuit is connected with an external signal source. The direct-current voltage conversion circuit is used for generating a target voltage signal according to an initial voltage signal provided by the external signal source. The direct-current voltage conversion circuit comprises a topology form selection module, a first inductor, a second inductor, a capacitor group and a load group. The topology form selection module switches a topology form to obtain a target topology form. The first inductor generates a first electric signal according to a pre-input phase state and the initial voltage signal. The second inductor generates a second electric signal according to the phase state and the initial voltage signal. The capacitor group performs electric storage and discharging according to the target topology form, the first electric signal and the second electric signal to output a discharging electric signal. The load group generates the target voltage signal according to the discharging electric signal. The application can reduce the loss of capacitor charging and discharging when the voltage conversion is relatively high, and improve the efficiency of the direct-current voltage converter.

Description

Technical Field

[0001] This invention relates to the field of DC-DC conversion technology, and in particular to a DC-DC voltage conversion circuit and a DC-DC voltage conversion system. Background Technology

[0002] Currently, DC-DC converters incorporate transformer circuits, and within these transformer circuits, switched-capacitor converters are integrated. These switched-capacitor converters use multiple capacitors and switches for power conversion. However, due to topology limitations, they can only operate at a fixed voltage conversion ratio. At higher voltage conversion ratios, the charging and discharging losses of the capacitors lead to a decrease in the efficiency of the switched-capacitor transformer circuit. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a DC-DC voltage conversion circuit that can reduce capacitor charging and discharging losses and improve the efficiency of the DC-DC voltage converter when the voltage conversion ratio is high.

[0004] The present invention also proposes a DC voltage conversion system.

[0005] In a first aspect, one embodiment of the present invention provides a DC-DC voltage conversion circuit, the DC-DC voltage conversion circuit being connected to an external signal source, the DC-DC voltage conversion circuit being used to generate a target voltage signal based on an initial voltage signal provided by the external signal source, the DC-DC voltage conversion circuit comprising:

[0006] A topology selection module, which is used to switch topology modes to obtain a target topology mode;

[0007] A first inductor, one end of which is connected to the external signal source and the other end of which is connected to the topology selection module, is used to generate a first electrical signal based on a pre-input phase state and the initial voltage signal; wherein the phase state is obtained based on the initial voltage signal.

[0008] The second inductor has one end connected to the external signal source and the other end connected to the topology selection module. The second inductor is used to generate a second electrical signal based on the phase state and the initial voltage signal.

[0009] A capacitor bank is connected to the topology selection module, the first inductor, and the second inductor. The capacitor bank is used to store electrical signals according to the target topology, the first electrical signal, and the second electrical signal to obtain a gain electrical signal. The capacitor bank is also used to discharge the gain electrical signal to output a discharge electrical signal.

[0010] A load group is connected to the topology selection module. The discharge electrical signal is transmitted to the load group after passing through the topology selection module. The load group is used to generate a target voltage signal based on the discharge electrical signal.

[0011] The DC-DC voltage conversion circuit of this invention has at least the following beneficial effects: the topology selection module switches the topology of the DC-DC voltage conversion circuit to the target topology; the first inductor generates a corresponding first electrical signal based on the phase state and the initial voltage signal input from the external signal source, wherein the phase state is obtained based on the initial voltage signal; the second inductor generates a corresponding second electrical signal based on the phase state and the initial voltage signal; the capacitor bank stores the target topology, the first electrical signal, and the second electrical signal; after the capacitor bank is saturated, a gain electrical signal is obtained, and the gain electrical signal is discharged to output a discharge electrical signal; the discharge electrical signal is transmitted to the load group after passing through the topology selection module; the load group receives the discharge electrical signal and stores it electrically to generate the target voltage signal. The topology selection module switches to the target topology. The first inductor generates a first electrical signal based on the phase state and the initial voltage signal, and the second inductor generates a second electrical signal based on the phase state and the initial voltage signal. The capacitor bank charges and discharges according to the target topology, the first electrical signal, and the second electrical signal, and outputs a discharge electrical signal. The load bank stores the discharge electrical signal to generate the target voltage signal. This can reduce the loss of capacitor charging and discharging when the voltage conversion ratio is high, and improve the efficiency of the DC voltage converter.

[0012] According to other embodiments of the DC-DC voltage conversion circuit of the present invention, the target topology includes a first topology and a second topology, and the topology selection module includes a third power switch, a sixth power switch and a ninth power switch;

[0013] The first topology indicates that the third power switch, the sixth power switch, and the ninth power switch are turned on;

[0014] The second topology indicates that the third power switch, the sixth power switch, and the ninth power switch are turned off.

[0015] According to other embodiments of the DC voltage conversion circuit of the present invention, the topology selection module further includes a first power switch, a second power switch, a fourth power switch, a fifth power switch, a seventh power switch, an eighth power switch, a tenth power switch, an eleventh power switch, a twelfth power switch, a thirteenth power switch, and a fourteenth power switch;

[0016] The capacitor bank includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor;

[0017] One end of the first power switch is connected to the first capacitor, and the other end is connected to the load group; one end of the second power switch is connected between the first power switch and the first capacitor, and the other end is connected to the second capacitor; one end of the third power switch is connected between the second power switch and the second capacitor, and the other end is connected to the first capacitor; one end of the fourth power switch is connected between the third power switch and the first capacitor, and the other end is connected to the first inductor; one end of the fifth power switch is connected between the second power switch and the second capacitor, and the other end is connected to the third capacitor; one end of the sixth power switch is connected between the fifth power switch and the third capacitor, and the other end is connected to the second capacitor; one end of the seventh power switch is connected between the sixth power switch and the second capacitor, and the other end is connected to the second inductor; the third power switch is connected between the first power switch and the second capacitor, and the second power switch is connected between the second power switch and the second capacitor; the fourth power switch is connected between the first power switch and the third capacitor, and the second power switch is connected between the first power switch and the second capacitor, and the second power switch is connected between the second power switch and the second capacitor, and the third ... One end of the eighth power switch is connected between the fifth power switch and the third capacitor, and the other end is connected to the fourth capacitor; one end of the ninth power switch is connected between the eighth power switch and the fourth capacitor, and the other end is connected to the third capacitor; one end of the tenth power switch is connected between the ninth power switch and the third capacitor, and the other end is connected to the first inductor; one end of the eleventh power switch is connected between the eighth power switch and the fourth capacitor, and the other end is connected to the fifth capacitor; one end of the twelfth power switch is connected between the eleventh power switch and the fifth capacitor, and the other end is connected between the fourth capacitor and the second inductor; one end of the thirteenth power switch is connected between the fourth capacitor and the second inductor, and the other end is grounded; one end of the fourteenth power switch is connected between the fifth capacitor and the first inductor, and the other end is grounded.

[0018] According to other embodiments of the DC-DC voltage conversion circuit of the present invention, the DC-DC voltage conversion circuit further includes a signal output terminal, the initial voltage signal includes a first initial signal and a second initial signal, and the target voltage signal includes a first target signal and a second target signal;

[0019] If the DC voltage conversion circuit switches to the first topology and the external signal source provides the first initial signal, the first power switch, the third power switch, the fifth power switch, the seventh power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch are turned off, and the signal output terminal outputs the first target signal according to the first topology and the first initial signal;

[0020] If the DC voltage conversion circuit switches to the first topology and the external signal source provides the second initial signal, the second power switch, the fourth power switch, the sixth power switch, the eighth power switch, the tenth power switch, the twelfth power switch and the thirteenth power switch are turned off, and the signal output terminal outputs the second target signal according to the first topology and the second initial signal.

[0021] According to other embodiments of the DC-DC voltage conversion circuit of the present invention, the target voltage signal further includes a third target signal and a fourth target signal;

[0022] If the DC voltage conversion circuit switches to the second topology and the external signal source provides the first initial signal, the first power switch, the third power switch, the fifth power switch, the sixth power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch are turned off, and the signal output terminal outputs the third target signal according to the second topology and the first initial signal;

[0023] If the DC voltage conversion circuit switches to the second topology and the external signal source provides the second initial signal, the second power switch, the third power switch, the sixth power switch, the eighth power switch, the ninth power switch, the twelfth power switch and the thirteenth power switch are turned off, and the signal output terminal outputs the fourth target signal according to the second topology and the second initial signal.

[0024] In a second aspect, one embodiment of the present invention provides a DC voltage conversion system, comprising:

[0025] An external signal source is used to provide the initial voltage signal;

[0026] And the DC voltage conversion circuit as described in the first aspect.

[0027] According to other embodiments of the present invention, the DC-DC voltage conversion system further includes:

[0028] A topology switching control module is connected to the DC-DC voltage conversion circuit, and the topology switching control module is used to output a topology switching control signal to the DC-DC voltage conversion circuit.

[0029] The DC voltage conversion circuit switches to the target topology according to the topology switching control signal.

[0030] According to other embodiments of the DC-DC voltage conversion system of the present invention, the target topology includes a first topology and a second topology, and the topology switching control signal includes a first switching control signal and a second switching control signal;

[0031] The DC voltage conversion circuit switches to the first topology according to the first switching control signal;

[0032] The DC voltage conversion circuit switches to the second topology according to the second switching control signal.

[0033] According to other embodiments of the present invention, the DC-DC voltage conversion system further includes:

[0034] A power switch control module, one end of which is connected to the external signal source and the other end of which is connected to the DC-DC voltage conversion circuit, is used to control the topology selection module of the DC-DC voltage conversion circuit to be turned on or off according to the target topology and the initial voltage signal.

[0035] According to other embodiments of the DC-DC voltage conversion system of the present invention, the target topology includes a first topology and a second topology, and the initial voltage signal includes a first initial signal and a second initial signal;

[0036] The DC voltage conversion circuit includes the topology selection module, which includes a first power switch, a second power switch, a third power switch, a fourth power switch, a fifth power switch, a sixth power switch, a seventh power switch, an eighth power switch, a ninth power switch, a tenth power switch, an eleventh power switch, a twelfth power switch, a thirteenth power switch, and a fourteenth power switch.

[0037] The power switch control module controls the first power switch, the third power switch, the fifth power switch, the seventh power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch to turn off according to the first topology and the first initial signal;

[0038] The power switch control module controls the second power switch, the fourth power switch, the sixth power switch, the eighth power switch, the tenth power switch, the twelfth power switch and the thirteenth power switch to turn off according to the first topology and the second initial signal;

[0039] The power switch control module controls the first power switch, the third power switch, the fifth power switch, the sixth power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch to turn off according to the second topology and the first initial signal;

[0040] The power switch control module controls the second power switch, the third power switch, the sixth power switch, the eighth power switch, the ninth power switch, the twelfth power switch and the thirteenth power switch to turn off according to the second topology and the second initial signal.

[0041] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description and the accompanying drawings. Attached Figure Description

[0042] Figure 1 This is a module block diagram of a specific embodiment of the DC voltage conversion circuit in this invention;

[0043] Figure 2 This is a circuit schematic diagram of a specific embodiment of the DC voltage conversion circuit in this invention.

[0044] Figure 3 This is a circuit schematic diagram of another specific embodiment of the DC voltage conversion circuit in this invention.

[0045] Figure 4 This is a circuit schematic diagram of another specific embodiment of the DC voltage conversion circuit in this invention;

[0046] Figure 5 This is a circuit schematic diagram of another specific embodiment of the DC voltage conversion circuit in this invention;

[0047] Figure 6 This is a circuit schematic diagram of another specific embodiment of the DC voltage conversion circuit in this invention;

[0048] Figure 7 This is a circuit schematic diagram of another specific embodiment of the DC voltage conversion circuit in this invention;

[0049] Figure 8 This is a circuit schematic diagram of another specific embodiment of the DC voltage conversion circuit in this invention;

[0050] Figure 9 This is a circuit diagram of another specific embodiment of the DC voltage conversion circuit in this invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] External signal source 101, first inductor 102, second inductor 103, topology selection module 104, capacitor bank 105, load bank 106. Detailed Implementation

[0053] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0055] It should be noted that although the system diagram shows functional modules and the flowchart shows the logical order, in some cases, the steps shown or described may be executed in a different order than the module division in the system or the order in the flowchart.

[0056] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0057] In the description of the embodiments of the present invention, the term "several" means one or more, and the term "multiple" means two or more. The terms "greater than," "less than," and "exceeding" should be understood as excluding the stated number, while the terms "above," "below," and "within" should be understood as including the stated number. The terms "first" and "second" should be understood as distinguishing technical features, and not as indicating or implying relative importance, the number of indicated technical features, or the order of the indicated technical features.

[0058] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0059] DC-DC voltage conversion systems include switched-capacitor converters, which use multiple capacitors and switches for power conversion. Furthermore, the circuit topology in DC-DC voltage conversion systems typically switches between two or more phases. However, due to the limitations of the topology, switched-capacitor circuits can only operate at a fixed voltage conversion ratio. When the voltage conversion ratio is high, the losses from capacitor charging and discharging lead to a decrease in the efficiency of the switched-capacitor power voltage converter.

[0060] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a DC-DC voltage conversion circuit that can reduce capacitor charging and discharging losses and improve the efficiency of the DC-DC voltage converter when the voltage conversion ratio is high.

[0061] Please refer to Figure 1 , Figure 1 This embodiment of the present invention discloses a block diagram of a DC-DC voltage conversion circuit. The DC-DC voltage conversion circuit is connected to an external signal source 101 and is used to generate a target voltage signal based on an initial voltage signal provided by the external signal source 101. The DC-DC voltage conversion circuit includes: a first inductor 102, a second inductor 103, a topology selection module 104, a capacitor bank 105, and a load bank 106. The first inductor 102, the second inductor 103, the topology selection module 104, the capacitor bank 105, and the load bank 106 are all electrically connected.

[0062] The topology selection module 104 is used to switch topology configurations to obtain a target topology configuration. One end of the first inductor 102 is connected to an external signal source 101, and the other end is connected to the topology selection module 104. The first inductor 102 is used to generate a first electrical signal based on a pre-input phase state and an initial voltage signal; wherein the phase state is obtained based on the initial voltage signal. One end of the second inductor 103 is connected to the external signal source 101, and the other end is connected to the topology selection module 104. The second inductor 103 is used to generate a second electrical signal based on the phase state and the initial voltage signal. A capacitor bank 105 is connected to the topology selection module 104, the first inductor 102, and the second inductor 103. The capacitor bank 105 is used to electrically store the target topology configuration, the first electrical signal, and the second electrical signal to obtain a gain electrical signal. The capacitor bank 105 is also used to discharge the gain electrical signal to output a discharge electrical signal. The load group 106 is connected to the topology selection module 104. The discharge electrical signal is transmitted to the load group 106 after passing through the topology selection module 104. The load group 106 is used to generate a target voltage signal based on the discharge electrical signal.

[0063] The topology selection module 104 switches the topology of the DC-DC voltage conversion circuit to the target topology. The first inductor 102 generates a corresponding first electrical signal based on the phase state and the initial voltage signal input from the external signal source 101, wherein the phase state is obtained from the initial voltage signal. The second inductor 103 generates a corresponding second electrical signal based on the phase state and the initial voltage signal. The capacitor bank 105 stores the target topology, the first electrical signal, and the second electrical signal. After the capacitor bank reaches saturation, a gain electrical signal is obtained, and the gain electrical signal is discharged to output a discharge electrical signal. The discharge electrical signal is transmitted to the load bank 106 after passing through the topology selection module 104. The load bank 106 receives the discharge electrical signal and stores it to generate the target voltage signal. The topology selection module 104 switches to the target topology. The first inductor 102 generates a first electrical signal based on the phase state and the initial voltage signal, and the second inductor 103 generates a second electrical signal based on the phase state and the initial voltage signal. The capacitor bank 105 charges and discharges according to the target topology, the first electrical signal, and the second electrical signal, and outputs a discharge electrical signal. The load bank 106 stores the discharge electrical signal to generate the target voltage signal. This reduces the loss of capacitor charging and discharging when the voltage conversion ratio is high, and improves the efficiency of the DC voltage converter.

[0064] Please refer to Figure 2 and Figure 3 , Figure 2 This invention discloses a circuit schematic diagram of a DC voltage conversion circuit as one embodiment. Figure 3 This invention discloses a circuit schematic of a DC-DC voltage conversion circuit according to one embodiment. In some embodiments, the target topology includes a first topology and a second topology, and the topology selection module 104 includes a third power switch, a sixth power switch, and a ninth power switch.

[0065] The first topology represents the third, sixth, and ninth power switches being turned on, while the second topology represents the third, sixth, and ninth power switches being turned off.

[0066] It should be noted that the third power switch is Figure 2 or Figure 3 The power switch S3 in the middle, the sixth power switch is Figure 2 or Figure 3 The power switch S6 in the middle, the ninth power switch is Figure 2 or Figure 3 The power switch S9 in the middle. Figure 2 This indicates that the DC-DC voltage conversion circuit is in the first topology configuration. Figure 3 This indicates that the DC-DC voltage conversion circuit is in the second topology.

[0067] The first topology has a transformation ratio of 13 / D, allowing the DC-DC converter to operate at transformation ratios exceeding 26. The second topology has a transformation ratio of 6 / D, enabling it to operate at transformation ratios exceeding 12. The first topology provides a higher transformation ratio. Compared to the first topology, in the second topology, the third, sixth, and ninth power switches S3, S6, and S9 are off, while power switches S4, S7, and S10 are on. This reduces the switching losses of six power switches.

[0068] Reference Figure 2 and Figure 3 In some embodiments, the topology selection module 104 further includes a first power switch, a second power switch, a fourth power switch, a fifth power switch, a seventh power switch, an eighth power switch, a tenth power switch, an eleventh power switch, a twelfth power switch, a thirteenth power switch, and a fourteenth power switch. The capacitor bank 105 includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor.

[0069] The first power switch is connected at one end to the first capacitor and at the other end to the load group; the second power switch is connected at one end between the first power switch and the first capacitor and at the other end to the second capacitor; the third power switch is connected at one end between the second power switch and the second capacitor and at the other end to the first capacitor; the fourth power switch is connected at one end between the third power switch and the first capacitor and at the other end to the first inductor; the fifth power switch is connected at one end between the second power switch and the second capacitor and at the other end to the third capacitor; the sixth power switch is connected at one end between the fifth power switch and the third capacitor and at the other end to the second capacitor; the seventh power switch is connected at one end between the sixth power switch and the second capacitor and at the other end to the second inductor; the eighth power switch... One end of the ninth power switch is connected between the fifth power switch and the third capacitor, and the other end is connected to the fourth capacitor; one end of the ninth power switch is connected between the eighth power switch and the fourth capacitor, and the other end is connected to the third capacitor; one end of the tenth power switch is connected between the ninth power switch and the third capacitor, and the other end is connected to the first inductor; one end of the eleventh power switch is connected between the eighth power switch and the fourth capacitor, and the other end is connected to the fifth capacitor; one end of the twelfth power switch is connected between the eleventh power switch and the fifth capacitor, and the other end is connected between the fourth capacitor and the second inductor; one end of the thirteenth power switch is connected between the fourth capacitor and the second inductor, and the other end is grounded; one end of the fourteenth power switch is connected between the fifth capacitor and the first inductor, and the other end is grounded.

[0070] It should be noted that the first power switch is Figure 2 or Figure 3The power switch S1 in the middle, the second power switch is Figure 2 or Figure 3 The power switch S2 in the middle, the fourth power switch is Figure 2 or Figure 3 The power switch S4 in the middle, the fifth power switch is Figure 2 or Figure 3 The power switch S5 in the middle, the seventh power switch is Figure 2 or Figure 3 The power switch S7 in the middle, the eighth power switch is Figure 2 or Figure 3 The power switch S8 in the middle, the tenth power switch is Figure 2 or Figure 3 The power switch S10 in the middle, the eleventh power switch is Figure 2 or Figure 3 The power switch S11 in the middle, the twelfth power switch is Figure 2 or Figure 3 The power switch S12 in the middle, the thirteenth power switch is Figure 2 or Figure 3 The power switch S13 in the middle, the fourteenth power switch is Figure 2 or Figure 3 The power switch S14 is in the middle. The first capacitor is Figure 2 or Figure 3 The capacitor C1 in the middle, the second capacitor is Figure 2 or Figure 3 The capacitor C2 in the middle, the third capacitor is Figure 2 or Figure 3 The capacitor C3 in the middle, the fourth capacitor is Figure 2 or Figure 3 The capacitor C4 in the middle, the fifth capacitor is Figure 2 or Figure 3 Capacitor C5 in the middle.

[0071] Please refer to Figure 4 and Figure 5 , Figure 4 This invention discloses a circuit schematic diagram of a DC voltage conversion circuit as one embodiment. Figure 5 This invention discloses a circuit diagram of a DC-DC voltage conversion circuit according to one embodiment. The DC-DC voltage conversion circuit also includes a signal output terminal, wherein the initial voltage signal includes a first initial signal and a second initial signal, and the target voltage signal includes a first target signal and a second target signal.

[0072] If the DC voltage conversion circuit switches to the first topology and the external signal source 101 provides the first initial signal, the first power switch S1, the third power switch S3, the fifth power switch S5, the seventh power switch S7, the ninth power switch S9, the eleventh power switch S11 and the fourteenth power switch S14 are turned off, and the signal output terminal outputs the first target signal according to the first topology and the first initial signal.

[0073] If the DC voltage conversion circuit switches to the first topology and the external signal source 101 provides the second initial signal, the second power switch S2, the fourth power switch S4, the sixth power switch S6, the eighth power switch S8, the tenth power switch S10, the twelfth power switch S12 and the thirteenth power switch S13 are turned off, and the signal output terminal outputs the second target signal according to the first topology and the second initial signal.

[0074] It should be noted that the signal output terminal is Figure 4 or Figure 5 The output terminal Vout of the circuit. If the DC-DC voltage conversion circuit switches to the first topology and the external signal source 101 provides the first initial signal, the first phase state is obtained according to the first initial signal, the DC-DC voltage conversion circuit switches to the first phase state, and the first power switch S1, the third power switch S3, the fifth power switch S5, the seventh power switch S7, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 are turned off according to the first phase state. If the DC-DC voltage conversion circuit switches to the first topology and the external signal source 101 provides the second initial signal, the second phase state is obtained according to the second initial signal, the DC-DC voltage conversion circuit switches to the second phase state, and the second power switch S2, the fourth power switch S4, the sixth power switch S6, the eighth power switch S8, the tenth power switch S10, the twelfth power switch S12, and the thirteenth power switch S13 of the DC-DC voltage conversion circuit are turned off according to the second phase state.

[0075] When the DC-DC voltage conversion circuit switches to the first phase state, according to the nodal voltage method, the voltage across the capacitor represents the inductor voltage, and the voltage across the second inductor 103 can be obtained as follows:

[0076] V L2 D1=(V C3 -V C4 -V in )*D1=(V C5 -V in )*D1=(V C1 -V C2 -V C4 -V in )*D1

[0077] When the DC-DC voltage conversion circuit switches to the second phase state, according to the nodal voltage method, the voltage across the capacitor represents the inductor voltage, and the voltage across the first inductor 102 can be obtained as follows:

[0078] V L1 D2=(V C4 -V C5 -V in )*D2=(V C2 -V C3 -V C5 -V in )*D2=(V out -V C1 -V C3 -V C5 -V in )*D2

[0079] Based on the volt-second balance across the inductor, the voltage change across the inductor is 0 within one period T, therefore: V L2 D1+V L2 D2 = 0, because V in the second phase state L2 D2+V in D2 = 0, therefore V L2 D1 = V in D2. Similarly, we can obtain: V L1 D2 = V in D1.

[0080] Let D1 = D2 = D, D1 + D2 = T, L1 = L2, then we can obtain:

[0081] V C5 *D=V in *T

[0082] V C4 *D=2V in *T

[0083] V C3 *D=3V in *T

[0084] V C2 *D=5V in *T

[0085] V C1 *D=8V in *T

[0086] V out *D=13V in *T

[0087] V out =13V in *T / D

[0088] Please refer to Figure 6 and Figure 7 , Figure 6 This invention discloses a circuit schematic diagram of a DC voltage conversion circuit as one embodiment. Figure 7 This invention discloses a circuit diagram of a DC-DC voltage conversion circuit according to one embodiment. In some embodiments, the target voltage signal further includes a third target signal and a fourth target signal.

[0089] If the DC voltage conversion circuit switches to the second topology and the external signal source provides the first initial signal, the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11 and the fourteenth power switch S14 are turned off, and the signal output terminal outputs the third target signal according to the second topology and the first initial signal.

[0090] If the DC voltage conversion circuit switches to the second topology and the external signal source provides the second initial signal, the second power switch S2, the third power switch S3, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the twelfth power switch S12 and the thirteenth power switch S13 are turned off, and the signal output terminal outputs the fourth target signal according to the second topology and the second initial signal.

[0091] It should be noted that if the DC-DC voltage conversion circuit switches to the second topology and the external signal source 101 provides the first initial signal, a first phase state is obtained based on the first initial signal, and the DC-DC voltage conversion circuit switches to the first phase state. Based on the first phase state, the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 are turned off. If the DC-DC voltage conversion circuit switches to the second topology and the external signal source 101 provides the second initial signal, a second phase state is obtained based on the second initial signal, and the DC-DC voltage conversion circuit switches to the second phase state. Based on the second phase state, the second power switch S2, the third power switch S3, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the twelfth power switch S12, and the thirteenth power switch S13 of the DC-DC voltage conversion circuit are turned off.

[0092] When the DC-DC voltage conversion circuit switches to the first phase state, according to the nodal voltage method, the voltage across the capacitor represents the inductor voltage, and the voltage across the second inductor 103 can be obtained as follows:

[0093] V L2 D1=(V C5 -V in )*D1=(V C3 -VC4 -V in )*D1=(V C1 -V C2 -V in )*D1

[0094] When the DC-DC voltage conversion circuit switches to the second phase state, according to the nodal voltage method, the voltage across the capacitor represents the inductor voltage, and the voltage across the first inductor 102 can be obtained as follows:

[0095] V L1 D2=(V C4 -V C5 -V in )*D2=(V C2 -V C3 -V in )*D2=(V out -V C1 -V in )*D2

[0096] Based on the volt-second balance across the inductor, the voltage change across the inductor is 0 within one period T, therefore: V L2 D1+V L2 D2 = 0, because V in the second phase state L2 D2+V in D2 = 0, therefore V L2 D1 = V in D2. Similarly, we can obtain: V L1 D2 = V in D1.

[0097] Let D1 = D2 = D, D1 + D2 = T, then we can obtain:

[0098] V C5 *D=V in *T

[0099] V C4 *D=2V in *T

[0100] V C3 *D=3V in *T

[0101] V C2 *D=4V in *T

[0102] V C1 *D=5V in *T

[0103] V out *D=6V in *T

[0104] V out =6V in *T / D

[0105] Please refer to Figure 8 and Figure 9 , Figure 8 This invention discloses a circuit schematic diagram of a DC voltage conversion circuit as one embodiment. Figure 9 This invention discloses a circuit schematic of a DC-DC voltage conversion circuit according to one embodiment. In some embodiments, when D1+D2 is less than one period T, the DC-DC voltage conversion circuit operates in the third phase state for the remaining time, during which the upper end of the inductor is grounded. The initial voltage signal also includes a third initial signal, and the target voltage signal also includes a fifth target signal and a sixth target signal.

[0106] If the DC voltage conversion circuit switches to the first topology and the external signal source provides the third initial signal, the first power switch S1, the second power switch S2, the third power switch S3, the fourth power switch S4, the fifth power switch S5, the sixth power switch S6, the seventh power switch S7, the ninth power switch S9, the tenth power switch S10, the eleventh power switch S11 and the twelfth power switch S12 are turned off, and the signal output terminal outputs the fifth target signal according to the first topology and the third initial signal.

[0107] If the DC voltage conversion circuit switches to the second topology and the external signal source provides the third initial signal, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the eleventh power switch S11 and the twelfth power switch S12 are turned off, and the signal output terminal outputs the sixth target signal according to the second topology and the third initial signal.

[0108] It should be noted that if the DC-DC voltage conversion circuit switches to the first topology and the external signal source 101 provides the third initial signal, the third phase state is obtained based on the third initial signal, and the DC-DC voltage conversion circuit switches to the third phase state. Based on the third phase state, the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 are turned off. If the DC-DC voltage conversion circuit switches to the second topology and the external signal source 101 provides the third initial signal, the third phase state is obtained based on the third initial signal, and the DC-DC voltage conversion circuit switches to the third phase state. Based on the third phase state, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the eleventh power switch S11, and the twelfth power switch S12 of the DC-DC voltage conversion circuit are turned off.

[0109] In some embodiments, the DC-DC voltage conversion circuit can select its topology according to the load requirements. In applications requiring a high transformation ratio, it switches to a first topology via a topology selection module; conversely, when a higher transformation ratio is not needed, it switches to a second topology via the same module. The DC-DC voltage conversion circuit mainly consists of a first phase configuration and a second phase configuration, capable of adjusting different operating states according to voltage transformation ratio requirements, thus having a wider operating range. For example, in a photovoltaic-driven laser detection system, when the laser detector is operating, and the 1V output from the photovoltaic panel needs to be boosted to the 26V required by the laser sensor, the topology selection module switches to the first topology configuration, where D = 0.5 and the boost ratio is 26, enabling the laser detector to operate. When the laser detector is not operating and the photovoltaic panel is charging the lithium battery, the topology selection module switches to the second topology configuration, where D = 0.5 and the boost ratio is 12, enabling the lithium battery to charge.

[0110] In some embodiments, the DC-DC voltage conversion circuit can also be used for step-down conversion, converting the initial voltage signal V provided by the external signal source into a step-down signal. in and the output voltage V at the signal output terminal out By making the substitutions, a buck converter topology can be obtained. The turns ratio of the DC-DC converter circuit is then: In the first topology, it is: V out =(D*V in ) / (13*T), in the second topological form: V out =(D*V in ) / (6*T).

[0111] In some embodiments, the number of capacitors and switches in the DC-DC voltage conversion circuit can be increased or decreased according to application requirements, and the voltage conversion ratio V out / V in The relationship between the capacitance and the number of capacitors N is shown in Table 1 below:

[0112] Table 1. Number of topological capacitors and voltage turns ratio V out / V in The relationship (during pressure boost)

[0113] Number of capacitors 3 4 5 6 7 N First topological form 5 / D 8 / D 13 / D 21 / D 34 / D F(N-2) / D Second topological form 4 / D 5 / D 6 / D 7 / D 8 / D (N+1) / D

[0114] In addition, embodiments of this application also disclose a DC voltage conversion system. In some embodiments, the DC voltage conversion system includes an external signal source and a DC voltage conversion circuit.

[0115] An external signal source is used to provide an initial voltage signal. A DC-DC voltage conversion circuit is connected to the external signal source, and the DC-DC voltage conversion circuit is as described in any of the above embodiments, used to generate a target voltage signal based on the initial voltage signal provided by the external signal source.

[0116] In some embodiments, the DC-DC conversion system further includes a topology switching control module. The topology switching control module is connected to the DC-DC conversion circuit and is used to output a topology switching control signal to the DC-DC conversion circuit. The DC-DC conversion circuit switches to the target topology according to the topology switching control signal.

[0117] It should be noted that, according to the required transformer ratio, the user outputs the corresponding topology switching control signal through the topology switching control module to switch the DC voltage conversion circuit to the desired target topology.

[0118] In some embodiments, the target topology includes a first topology and a second topology, and the topology switching control signal includes a first switching control signal and a second switching control signal.

[0119] The DC-DC voltage conversion circuit switches to the first topology according to the first switching control signal, and switches to the second topology according to the second switching control signal.

[0120] It should be noted that when the user requires a higher transformation ratio, the topology switching control module outputs a first switching control signal to switch the DC-DC voltage conversion circuit to the desired first topology. When the user requires a lower transformation ratio, the topology switching control module outputs a second switching control signal to switch the DC-DC voltage conversion circuit to the desired second topology.

[0121] In some embodiments, the DC-DC conversion system further includes a power switch control module. One end of the power switch control module is connected to an external signal source, and the other end is connected to the DC-DC conversion circuit. The power switch control module is used to control the topology selection module of the DC-DC conversion circuit to be turned on or off according to the target topology and the initial voltage signal.

[0122] It should be noted that the power switch control module extracts the operating information of each power switch based on the target topology and the initial voltage signal, and outputs corresponding control signals to each power switch according to the operating information to control the power switches in the topology selection module to be turned on or off.

[0123] In some embodiments, the target topology includes a first topology and a second topology, and the initial voltage signal includes a first initial signal and a second initial signal.

[0124] The DC-DC voltage conversion circuit includes a topology selection module, which includes a first power switch S1, a second power switch S2, a third power switch S3, a fourth power switch S4, a fifth power switch S5, a sixth power switch S6, a seventh power switch S7, an eighth power switch S8, a ninth power switch S9, a tenth power switch S10, an eleventh power switch S11, a twelfth power switch S12, a thirteenth power switch S13, and a fourteenth power switch S14.

[0125] The power switch control module controls the first power switch S1, the third power switch S3, the fifth power switch S5, the seventh power switch S7, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 to turn off according to the first topology and the first initial signal. The power switch control module controls the second power switch S2, the fourth power switch S4, the sixth power switch S6, the eighth power switch S8, the tenth power switch S10, the twelfth power switch S12, and the thirteenth power switch S13 to turn off according to the first topology and the second initial signal. The power switch control module controls the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 to turn off according to the second topology and the first initial signal. The power switch control module controls the second power switch S2, the third power switch S3, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the twelfth power switch S12, and the thirteenth power switch S13 to turn off according to the second topology and the second initial signal.

[0126] It should be noted that the power switch control module outputs cut-off control signals to the first power switch S1, the third power switch S3, the fifth power switch S5, the seventh power switch S7, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 according to the first topology and the first initial signal, so as to cut off the first power switch S1, the third power switch S3, the fifth power switch S5, the seventh power switch S7, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14.

[0127] The power switch control module outputs cut-off control signals to the second power switch S2, the fourth power switch S4, the sixth power switch S6, the eighth power switch S8, the tenth power switch S10, the twelfth power switch S12, and the thirteenth power switch S13 according to the first topology and the second initial signal, so as to cut off the second power switch S2, the fourth power switch S4, the sixth power switch S6, the eighth power switch S8, the tenth power switch S10, the twelfth power switch S12, and the thirteenth power switch S13.

[0128] The power switch control module outputs cut-off control signals to the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 according to the second topology and the first initial signal, so as to cut off the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14.

[0129] The power switch control module outputs cut-off control signals to the second power switch S2, the third power switch S3, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the twelfth power switch S12, and the thirteenth power switch S13 according to the second topology and the second initial signal, so as to cut off the second power switch S2, the third power switch S3, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the twelfth power switch S12, and the thirteenth power switch S13.

[0130] In addition, in some embodiments, the initial voltage signal further includes a third initial signal. The power switch control module outputs a cutoff control signal to the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14 according to the first topology and the third initial signal, so as to cut off the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the ninth power switch S9, the eleventh power switch S11, and the fourteenth power switch S14.

[0131] The power switch control module outputs cutoff control signals to the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the eleventh power switch S11, and the twelfth power switch S12 according to the second topology and the third initial signal, so as to cut off the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the eighth power switch S8, the ninth power switch S9, the eleventh power switch S11, and the twelfth power switch S12.

[0132] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0133] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A DC voltage conversion circuit, characterized in that, The DC-DC voltage conversion circuit is connected to an external signal source. The DC-DC voltage conversion circuit is used to generate a target voltage signal based on an initial voltage signal provided by the external signal source. The DC-DC voltage conversion circuit includes: A topology selection module is used to switch topology modes to obtain a target topology mode. The target topology mode includes a first topology mode and a second topology mode. The topology selection module includes a third power switch, a sixth power switch, and a ninth power switch. The first topology mode indicates that the third, sixth, and ninth power switches are on; the second topology mode indicates that the third, sixth, and ninth power switches are off. The topology selection module also includes a first power switch, a second power switch, a fourth power switch, a fifth power switch, a seventh power switch, an eighth power switch, a tenth power switch, an eleventh power switch, a twelfth power switch, a thirteenth power switch, and a fourteenth power switch. The capacitor bank includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor. One end of the first power switch is connected to the first capacitor, and the other end is connected to the load bank. One end of the second power switch is connected between the first power switch and the first capacitor, and the other end is connected to the second capacitor. One end of the third power switch is connected between the second power switch and the second capacitor, and the other end is connected to the first capacitor. One end of the fourth power switch is connected between the third power switch and the... The first capacitor is connected to the second capacitor at one end, and the second capacitor at the other end is connected to the first inductor at the other end; the fifth power switch is connected at one end between the second power switch and the second capacitor, and at the other end is connected to the third capacitor at the other end; the sixth power switch is connected at one end between the fifth power switch and the third capacitor, and at the other end is connected to the second capacitor at the other end; the seventh power switch is connected at one end between the sixth power switch and the second capacitor, and at the other end is connected to the second inductor at the other end; the eighth power switch is connected at one end between the fifth power switch and the third capacitor, and at the other end is connected to the fourth capacitor at the other end; the ninth power switch is connected at one end between the eighth power switch and the fourth capacitor at the other end. One end of the tenth power switch is connected to the third capacitor; one end of the tenth power switch is connected between the ninth power switch and the third capacitor, and the other end is connected to the first inductor; one end of the eleventh power switch is connected between the eighth power switch and the fourth capacitor, and the other end is connected to the fifth capacitor; one end of the twelfth power switch is connected between the eleventh power switch and the fifth capacitor, and the other end is connected between the fourth capacitor and the second inductor; one end of the thirteenth power switch is connected between the fourth capacitor and the second inductor, and the other end is grounded; one end of the fourteenth power switch is connected between the fifth capacitor and the first inductor, and the other end is grounded. A first inductor, one end of which is connected to the external signal source and the other end of which is connected to the topology selection module, is used to generate a first electrical signal based on a pre-input phase state and the initial voltage signal; wherein the phase state is obtained based on the initial voltage signal. The second inductor has one end connected to the external signal source and the other end connected to the topology selection module. The second inductor is used to generate a second electrical signal based on the phase state and the initial voltage signal. A capacitor bank is connected to the topology selection module, the first inductor, and the second inductor. The capacitor bank is used to store electrical signals according to the target topology, the first electrical signal, and the second electrical signal to obtain a gain electrical signal. The capacitor bank is also used to discharge the gain electrical signal to output a discharge electrical signal. A load group is connected to the topology selection module. The discharge electrical signal is transmitted to the load group after passing through the topology selection module. The load group is used to generate the target voltage signal based on the discharge electrical signal.

2. The DC voltage conversion circuit according to claim 1, characterized in that, The DC-DC voltage conversion circuit also includes a signal output terminal, the initial voltage signal includes a first initial signal and a second initial signal, and the target voltage signal includes a first target signal and a second target signal; If the DC-DC voltage conversion circuit switches to the first topology and the external signal source provides the first initial signal, a first phase state is obtained based on the first initial signal. The DC-DC voltage conversion circuit switches to the first phase state and, based on the first phase state, the first power switch, the third power switch, the fifth power switch, the seventh power switch, the ninth power switch, the eleventh power switch, and the fourteenth power switch are turned off. The signal output terminal outputs the first target signal based on the first topology and the first initial signal. If the DC-DC voltage conversion circuit switches to the first topology and the external signal source provides the second initial signal, the second phase state is obtained according to the second initial signal, the DC-DC voltage conversion circuit switches to the second phase state, and the second power switch, the fourth power switch, the sixth power switch, the eighth power switch, the tenth power switch, the twelfth power switch and the thirteenth power switch are turned off according to the second phase state. The signal output terminal outputs the second target signal according to the first topology and the second initial signal.

3. The DC voltage conversion circuit according to claim 2, characterized in that, The target voltage signal also includes a third target signal and a fourth target signal; If the DC-DC voltage conversion circuit switches to the second topology and the external signal source provides the first initial signal, the first phase state is obtained according to the first initial signal, the DC-DC voltage conversion circuit switches to the first phase state, and the first power switch, the third power switch, the fifth power switch, the sixth power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch are turned off according to the first phase state. The signal output terminal outputs the third target signal according to the second topology and the first initial signal. If the DC-DC voltage conversion circuit switches to the second topology and the external signal source provides the second initial signal, the second phase state is obtained according to the second initial signal. The DC-DC voltage conversion circuit switches to the second phase state and cuts off the second power switch, the third power switch, the sixth power switch, the eighth power switch, the ninth power switch, the twelfth power switch and the thirteenth power switch according to the second phase state. The signal output terminal outputs the fourth target signal according to the second topology and the second initial signal.

4. A DC voltage conversion system, characterized in that, include: An external signal source is used to provide the initial voltage signal; And the DC voltage conversion circuit as described in any one of claims 1 to 3.

5. The DC voltage conversion system according to claim 4, characterized in that, The DC-DC voltage conversion system also includes: A topology switching control module is connected to the DC-DC voltage conversion circuit, and the topology switching control module is used to output a topology switching control signal to the DC-DC voltage conversion circuit. The DC voltage conversion circuit switches to the target topology according to the topology switching control signal.

6. The DC voltage conversion system according to claim 5, characterized in that, The target topology includes a first topology and a second topology, and the topology switching control signal includes a first switching control signal and a second switching control signal. The DC voltage conversion circuit switches to the first topology according to the first switching control signal; The DC voltage conversion circuit switches to the second topology according to the second switching control signal.

7. The DC voltage conversion system according to claim 5, characterized in that, The DC-DC voltage conversion system also includes: A power switch control module is provided, with one end connected to the external signal source and the other end connected to the DC-DC voltage conversion circuit. The power switch control module is used to control the power switch in the DC-DC voltage conversion circuit topology selection module to be turned on or off according to the target topology and the initial voltage signal.

8. The DC voltage conversion system according to claim 7, characterized in that, The target topology includes a first topology and a second topology, and the initial voltage signal includes a first initial signal and a second initial signal; The DC voltage conversion circuit includes the topology selection module, which includes a first power switch, a second power switch, a third power switch, a fourth power switch, a fifth power switch, a sixth power switch, a seventh power switch, an eighth power switch, a ninth power switch, a tenth power switch, an eleventh power switch, a twelfth power switch, a thirteenth power switch, and a fourteenth power switch. The power switch control module controls the first power switch, the third power switch, the fifth power switch, the seventh power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch to turn off according to the first topology and the first initial signal; The power switch control module controls the second power switch, the fourth power switch, the sixth power switch, the eighth power switch, the tenth power switch, the twelfth power switch and the thirteenth power switch to turn off according to the first topology and the second initial signal; The power switch control module controls the first power switch, the third power switch, the fifth power switch, the sixth power switch, the ninth power switch, the eleventh power switch and the fourteenth power switch to turn off according to the second topology and the first initial signal; The power switch control module controls the second power switch, the third power switch, the sixth power switch, the eighth power switch, the ninth power switch, the twelfth power switch and the thirteenth power switch to turn off according to the second topology and the second initial signal.

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