Charging circuit and electronic equipment

Abstract

The utility model relates to a charging circuit and electronic equipment. The charging circuit comprises an input end and an output end, the charge pump circuit comprises a first switch module and a first energy storage unit, the first switch module is connected to a first connecting line between the input end and the output end, and the first energy storage unit is connected with the input end and a node; the node is formed on a second connecting line between the input end and the output end; the second switch module is connected to a connecting line of the node and the first energy storage unit; wherein the charging circuit is in a voltage-regulating charging mode under the condition that the first switch module is in an on state and the second switch module is in an off state; and when the second switch module is in the conducting state, the charging circuit is in a charge pump mode. According to the embodiment of the invention, the functions of the charging circuit can be richer.

Description

Technical Field

[0001] The present disclosure relates to the field of mobile consumer electronics, and in particular to a charging circuit and electronic equipment. Background Art

[0002] With the advancement of technology, mobile phones and other electronic devices have become increasingly widespread. Currently, these devices commonly use voltage-regulated charging circuits and charge pumps to charge the battery modules within these devices. However, during the actual charging process, these circuits typically operate at different times, resulting in underutilized components and low circuit integration. Summary of the Invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a charging circuit and an electronic device, which can enrich the functions of the charging circuit and improve the integration of the charging circuit.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a charging circuit, including:

[0005] Input and output terminals;

[0006] A charge pump circuit, comprising a first switch module and a first energy storage unit, wherein the first switch module is connected to a first connection line between the input end and the output end, the first energy storage unit is connected to the input end and a node respectively, and the node is formed on a second connection line between the input end and the output end;

[0007] a second switch module connected to a connection line between the node and the first energy storage unit;

[0008] Wherein, when the first switch module is in the on state and the second switch module is in the off state, the charging circuit is in the voltage regulation charging mode;

[0009] When the second switch module is in the on state, the charging circuit is in a charge pump mode.

[0010] In some embodiments, the second switch module includes a first switch; the first switch module includes: a second switch and a third switch;

[0011] The first end of the second switch is connected to the input end;

[0012] The second end of the second switch is connected to the second end of the third switch;

[0013] The first end of the third switch is connected to the output end;

[0014] The first energy storage unit has one end connected to the first end of the second switch and the other end connected to the second end of the first switch;

[0015] The first end of the first switch is connected to the node;

[0016] The control end of the first switch, the control end of the second switch, and the control end of the third switch are respectively connected to the first control signal;

[0017] When the second switch and the third switch are both connected, the first switch module is in the on state.

[0018] In some embodiments, the charge pump circuit further includes: a second energy storage unit, a third energy storage unit, a fourth switch, a fifth switch, and a sixth switch;

[0019] The second end of the fourth switch is connected to the first end of the third switch in the first switch module;

[0020] The first end of the fourth switch and the second end of the fifth switch are both connected to the output end;

[0021] The first end of the fifth switch is connected to the second end of the sixth switch;

[0022] The second energy storage unit has one end connected to the connection line between the first end of the third switch and the second end of the fourth switch, and the other end connected to the connection line between the first end of the fifth switch and the second end of the sixth switch;

[0023] The third energy storage unit has one end connected to the output end and the other end connected to the first end of the sixth switch;

[0024] The control end of the fourth switch, the control end of the fifth switch, and the control end of the sixth switch are respectively connected to the second control signal.

[0025] In some embodiments, the charging circuit is applied to an electronic device having a charging interface;

[0026] When the charging interface is connected to an external power source, the parasitic inductance formed by the connector of the charging interface, the fourth switch, the fifth switch, the sixth switch, and the second energy storage unit can constitute a voltage-regulated charging circuit;

[0027] When the charging circuit is in the voltage-regulated charging mode, the voltage-regulated charging circuit charges the battery module of the electronic device.

[0028] In some embodiments, the connector of the charging interface includes: a flexible circuit board connecting the charging interface and the input end, and / or a data line connecting the charging interface and the external power supply.

[0029] In some embodiments, when the fourth switch and the sixth switch are both in an open state and the fifth switch is in a closed state, the second energy storage unit and the third energy storage unit are both in a charging state.

[0030] In some embodiments, when the fourth switch and the sixth switch are both in the on state and the fifth switch is in the off state, the second energy storage unit can charge the third energy storage unit and the battery module of the electronic device.

[0031] According to a second aspect of an embodiment of the present disclosure, there is provided a charging circuit, including:

[0032] Input terminal;

[0033] Output end, connected to the battery module;

[0034] A charge pump circuit includes a first switch module and a first energy storage unit, wherein the first switch module is connected to a first connection line between the input end and the output end, the first energy storage unit is connected to the input end and a node, respectively, and the node is formed on a second connection line between the input end and the output end; the first connection line is connected to the positive electrode of a battery module in the electronic device, and the second connection line is connected to the negative electrode of the battery module;

[0035] a second switch module connected to a connection line between the node and the first energy storage unit;

[0036] a control unit, connecting the first switch module and the second switch module;

[0037] When the first switch module is controlled to be in an on state and the second switch module is in an off state, the charging circuit is in a voltage regulation charging mode;

[0038] When the second switch module is controlled to be in the on state, the charging circuit is in a charge pump mode.

[0039] According to a third aspect of an embodiment of the present disclosure, there is provided an electronic device, including:

[0040] Charging port, flexible circuit board and battery module;

[0041] A charging circuit as described in one or more of the above embodiments;

[0042] Wherein, the input end of the charging circuit is connected to the charging interface through the flexible circuit board;

[0043] The output end of the charging circuit is connected to the battery module.

[0044] In some embodiments, the parasitic inductance formed by the flexible circuit board includes a first inductance and a second inductance;

[0045] The first inductor has one end connected to the positive electrode of the charging interface, and the other end connected to the first energy storage unit of the charging circuit and the first end of the second switch of the charging circuit through the input end of the charging circuit;

[0046] One end of the second inductor is connected to the negative electrode of the charging interface, and the other end is connected to the first end of the first switch and the first end of the sixth switch of the charging circuit through the input end.

[0047] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0048] The charging circuit of the disclosed embodiment can charge in two different charging modes: operating in a voltage-regulated charging mode to adjust the charging output voltage, and in a charge pump mode to improve charging efficiency. Therefore, the charging circuit of the disclosed embodiment integrates the functions of a charge pump circuit and a voltage-regulated circuit, enriching the functionality of the charging circuit.

[0049] Moreover, compared with the existing separate designs of charge pump circuit and voltage regulation circuit, the embodiment of the present disclosure enables the charging circuit to have a charge pump mode and a voltage regulation charging mode by adding a second switch module, which can reduce the number of charging devices used. It not only improves the integration of the charging circuit, reduces the space occupied by the charging circuit on the motherboard, but also reduces the complexity and packaging cost of the charging circuit.

[0050] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0052] Figure 1 A schematic diagram of a charging circuit according to an exemplary embodiment is shown. Figure 1 .

[0053] Figure 2 A schematic diagram of a charging circuit according to an exemplary embodiment is shown. Figure 2 .

[0054] Figure 3 A schematic diagram of a charging circuit according to an exemplary embodiment is shown. Figure 3 .

[0055] Figure 4A is a schematic diagram of a conventional voltage regulating circuit according to an exemplary embodiment.

[0056] Figure 4B is a schematic diagram of a conventional charge pump according to an exemplary embodiment.

[0057] Figure 5 The figure is a schematic diagram showing charging of an electronic device according to an exemplary embodiment.

[0058] Figure 6 The figure is a structural block diagram of an electronic device according to an exemplary embodiment.

[0059] The accompanying drawings in this specification are numeraled as follows:

[0060] Input terminal 101, output terminal 102, first switch module 103, first energy storage unit 104, node 105, second switch module 106, second energy storage unit 107, third energy storage unit 108;

[0061] The first switch S1, the second switch S2, the third switch S3, the fourth switch S4, the fifth switch S5, the sixth switch S6, the first inductor L f1 , the second inductor L f2 , the third inductor L c1 , the fourth inductor L c2 ;

[0062] Flexible circuit board 201, charging interface 202, battery module 203, charging circuit 204, data line 300;

[0063] A first transistor M1, a second transistor M2, a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, a low-voltage side inductor L1, a fourth energy storage unit C1, a fifth energy storage unit C2, a sixth energy storage unit C3, and a seventh energy storage unit C4. DETAILED DESCRIPTION

[0064] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0065] In the embodiment of the present disclosure, the first to sixth switches can all be triodes, thin film transistors, field effect transistors, or other devices with the same characteristics. In the embodiment of the present disclosure, to distinguish between the two ends of each switch in addition to the control end, one end is referred to as the first end and the other end is referred to as the second end.

[0066] When the first to sixth switches are all triodes, the control end may be the base, the first end may be the collector, and the second end may be the emitter; or, the control end may be the base, the first end may be the emitter, and the second end may be the collector.

[0067] When the first to sixth switches are all thin film transistors or field effect transistors, the control end may be a gate, the first end may be a drain, and the second end may be a source; or, the control end may be a gate, the first end may be a source, and the second end may be a drain.

[0068] An embodiment of the present disclosure provides a charging circuit, which can be used to charge a battery module built into an electronic device. Figure 1 A schematic diagram of a charging circuit according to an exemplary embodiment is shown. Figure 1 .like Figure 1 As shown, the charging circuit includes:

[0069] an input terminal 101 and an output terminal 102;

[0070] A charge pump circuit includes a first switch module 103 and a first energy storage unit 104, wherein the first switch module 103 is connected to a first connection line between the input terminal 101 and the output terminal 102, and the first energy storage unit 104 is connected to the input terminal 101 and a node 105 respectively, and the node 105 is formed on a second connection line between the input terminal 101 and the output terminal 102;

[0071] a second switch module 106 connected to the connection line between the node 105 and the first energy storage unit 104;

[0072] When the first switch module 103 is in the on state and the second switch module 106 is in the off state, the charging circuit is in the voltage regulation charging mode;

[0073] When the second switch module 106 is in the on state, the charging circuit is in a charge pump mode.

[0074] In the embodiments of the present disclosure, the charging circuit can be applied to electronic devices. For example, when a battery module in the electronic device needs to be charged, the charging circuit can be used to charge the battery module.

[0075] It should be noted that the electronic device also has a charging interface, and the input end of the charging circuit is connected to the charging interface to obtain the power signal provided by the external power supply connected to the charging interface; the output end of the charging circuit is connected to the battery module to transmit the charging signal to the battery module to charge the battery module.

[0076] In the embodiment of the present disclosure, the charge pump circuit is at least used to improve the charging efficiency of the charging circuit to achieve a fast charging function.

[0077] It should be noted that, in addition to the first switch module and the first energy storage unit, the charge pump circuit may further include a control unit, which may be used to generate a control signal to control the clock required by the first switch module.

[0078] Of course, the charge pump circuit may also include multiple other switches. The number and connection positions of the other switches may be set according to actual needs, and the embodiments of the present disclosure do not limit this.

[0079] Here, the charge pump circuit may further include other energy storage units in addition to the first energy storage unit. The number and connection positions of the other energy storage units may also be set according to actual needs, and the embodiment of the present disclosure does not impose any restrictions on this.

[0080] In an embodiment of the present disclosure, the first switch module may be composed of one or more switches. In some embodiments, the first switch module is composed of at least two switches in cascade connection.

[0081] When at least two switches are connected, the first switch module is in an on state; when one of the at least two switches is disconnected, the first switch module is in an off state.

[0082] In the embodiment of the present disclosure, the first energy storage unit may be composed of a capacitor component and / or an inductor component. The capacitor component may be composed of one capacitor and multiple capacitors in parallel, and the inductor component may be composed of one or more inductor devices.

[0083] In some embodiments, the first energy storage unit may be composed of a capacitor.

[0084] In the embodiments of the present disclosure, the first connection line and the second connection line may be lines connecting the positive and negative electrodes of the battery module, respectively. In some embodiments, the first connection line is connected to the positive electrode of the battery module, and the second connection line is connected to the negative electrode of the battery module. In other embodiments, the first connection line is connected to the negative electrode of the battery module, and the second connection line is connected to the positive electrode of the battery module.

[0085] In the disclosed embodiment, the second switch module is connected to the connection line between the node and the first energy storage unit. In other words, the charging circuit in the disclosed embodiment is formed by adding the second switch module to the charge pump circuit. When the second switch module is in the on state, the charging circuit functions as a charge pump circuit and can therefore operate in charge pump mode.

[0086] It should be noted that when the charging circuit is in the charge pump mode, the charging efficiency of the charging circuit can be improved to achieve a fast charging function.

[0087] In an embodiment of the present disclosure, the second switch module may be composed of one or more switches. In some embodiments, the second switch module is composed of at least two switches in cascade connection.

[0088] When at least two switches are connected, the second switch module is in an on state; when one of the at least two switches is disconnected, the second switch module is in an off state.

[0089] In the embodiment of the present disclosure, when the first switch module is in the on state and the second switch module is in the off state, the charging circuit is in the voltage-regulated charging mode, and the charging circuit can adjust the charging output voltage, thereby realizing voltage-regulated charging of the charging circuit.

[0090] For example, the charging circuit is used in a mobile phone. When the charging port of the mobile phone is connected to an external power supply, the charging circuit in the voltage regulation charging mode can adjust the charging output voltage to charge the battery module of the mobile phone at a voltage of 5V.

[0091] It should be noted that in the embodiment of the present disclosure, the control unit can control the switching states of the first switch module and the second switch module to enable the charging circuit to operate in the voltage regulation charging mode or the charge pump mode.

[0092] For example, in an adjustable voltage charging scenario, the charging circuit can be controlled in voltage regulation charging mode to adjust the output voltage to the battery module. In a fast charging scenario, the charging circuit can be controlled in charge pump mode to improve charging efficiency.

[0093] In the embodiment of the present disclosure, when the first switch module is in the on state and the second switch module is in the off state, the charging circuit is in the voltage regulation charging mode; when the second switch module is in the on state, the charging circuit is in the charge pump mode.

[0094] In other words, the charging circuit of the disclosed embodiment can charge in two different charging modes: it can operate in a voltage-regulated charging mode to adjust the charging output voltage, and it can also operate in a charge pump mode to improve charging efficiency. Therefore, the charging circuit of the disclosed embodiment integrates the functions of a charge pump circuit and a voltage-regulated circuit, making the charging circuit more functional.

[0095] Moreover, compared with the existing separate designs of charge pump circuit and voltage regulation circuit, the embodiment of the present disclosure enables the charging circuit to have a charge pump mode and a voltage regulation charging mode by adding a second switch module, which can reduce the number of charging devices used. It not only improves the integration of the charging circuit, reduces the space occupied by the charging circuit on the motherboard, but also reduces the complexity and packaging cost of the charging circuit.

[0096] In some embodiments, as Figure 2 As shown, the second switch module includes a first switch S1; the first switch module includes: a second switch S2 and a third switch S3;

[0097] A first end of the second switch S2 is connected to the input end 101;

[0098] The second end of the second switch S2 is connected to the second end of the third switch S3;

[0099] A first end of the third switch S3 is connected to the output end 102;

[0100] The first energy storage unit 104 has one end connected to the first end of the second switch S2 and the other end connected to the second end of the first switch S1;

[0101] A first end of the first switch S1 is connected to the node 105;

[0102] The control end of the first switch S1, the control end of the second switch S2 and the control end of the third switch S3 are respectively connected to the first control signal;

[0103] When the second switch S2 and the third switch S3 are both connected, the first switch module is in the on state.

[0104] The first control signal is used to control the switching state of the first switch, the switching state of the second switch and the switching state of the third switch, so as to switch the charging circuit between the voltage regulation charging mode and the charge pump mode.

[0105] In the embodiment of the present disclosure, the first switch, the second switch, and the third switch may all be metal-oxide semiconductor field effect transistors (MOSFETs).

[0106] It should be noted that if Figure 2 As shown, the first switch S1, the second switch S2 and the third switch S3 can all be N-type MOSFETs;

[0107] The first end of the first switch S1, the first end of the second switch S2 and the first end of the third switch S3 may all be sources of N-type MOSFETs;

[0108] The second end of the first switch S1, the second end of the second switch S2 and the second end of the third switch S3 may all be drains of N-type MOSFETs;

[0109] The control end of the first switch S1 , the control end of the second switch S2 , and the control end of the third switch S3 may all be gates of N-type MOSFETs.

[0110] In the embodiment of the present disclosure, when both the second switch and the third switch are connected, the first switch module is in the on state. When one of the second switch and the third switch is disconnected, the first switch module is in the off state. In this case, the signal input to the input end will not be transmitted to the output end, and the battery module of the electronic device will not be charged.

[0111] In the embodiment of the present disclosure, the control unit can be connected to the control end of the first switch, the control end of the second switch, and the control end of the third switch to generate a first control signal to control the switching state of the first switch, the switching state of the second switch, and the switching state of the third switch.

[0112] It is understood that the charging circuit can switch between the charge pump mode and the voltage regulation charging mode by controlling the first switch, the second switch and the third switch, making the charging circuit more functional. In addition, by sharing the first switch, the second switch and the third switch, the switching devices of the charging circuit can be more fully utilized, thereby improving the circuit integration. In some embodiments, such as Figure 2 As shown, the charge pump circuit further includes: a second energy storage unit 107, a third energy storage unit 108, a fourth switch S4, a fifth switch S5 and a sixth switch S6;

[0113] The second end of the fourth switch S4 is connected to the first end of the third switch S3 in the first switch module;

[0114] The first end of the fourth switch S4 and the second end of the fifth switch S5 are both connected to the output end 102;

[0115] A first end of the fifth switch S5 is connected to a second end of the sixth switch S6;

[0116] The second energy storage unit 107 has one end connected to the connection line between the first end of the third switch S3 and the second end of the fourth switch S4, and the other end connected to the connection line between the first end of the fifth switch S5 and the second end of the sixth switch S6;

[0117] The third energy storage unit 108 has one end connected to the output end 102 and the other end connected to the first end of the sixth switch S6;

[0118] The control end of the fourth switch S4 , the control end of the fifth switch S5 , and the control end of the sixth switch S6 are respectively connected to the second control signal.

[0119] The second control signal is used to control the switching state of the fourth switch, the switching state of the fifth switch, and the switching state of the sixth switch, so that the charging circuit can operate in different charging states in the voltage regulation charging mode. For example, it can operate in a state of charging the second energy storage unit and the third energy storage unit at the same time, and can also operate in a state of charging the third energy storage unit and the battery module.

[0120] In the embodiment of the present disclosure, the fourth switch, the fifth switch and the sixth switch may all be MOSFETs.

[0121] It should be noted that if Figure 2 As shown, the fourth switch S4, the fifth switch S5 and the sixth switch S6 may all be N-type MOSFETs;

[0122] The first end of the fourth switch S4, the first end of the fifth switch S5 and the first end of the sixth switch S6 may all be sources of N-type MOSFETs;

[0123] The second end of the fourth switch S4, the second end of the fifth switch S5, and the second end of the sixth switch S6 may all be drains of N-type MOSFETs;

[0124] The control terminal of the fourth switch S4 , the control terminal of the fifth switch S5 , and the control terminal of the sixth switch S6 may all be gates of N-type MOSFETs.

[0125] In the embodiment of the present disclosure, the second energy storage unit and the third energy storage unit can both be composed of a capacitor component and / or an inductor component. The capacitor component can be composed of one capacitor and multiple capacitors in parallel, and the inductor component can be composed of one or more inductor devices.

[0126] In some embodiments, the second energy storage unit and the third energy storage unit may each be composed of a capacitor.

[0127] It can be understood that the second energy storage unit, the third energy storage unit, the fourth switch, the fifth switch and the sixth switch can be used as common devices, which can operate when the charging circuit is in the voltage regulation charging mode and also when the charging circuit is in the charge pump mode, so that each device in the charging circuit can be fully utilized. When the charging circuit has both voltage regulation charging and charge pump charging functions, there is no need to add additional devices, which can reduce the complexity of the charging circuit layout and the packaging cost.

[0128] In some embodiments, as Figure 2 As shown, the charging circuit is applied to an electronic device having a charging interface;

[0129] When the charging interface is connected to an external power source, the parasitic inductance formed by the connector of the charging interface, the fourth switch S4, the fifth switch S5, the sixth switch S6 and the second energy storage unit 107 can constitute a voltage-regulated charging circuit;

[0130] When the charging circuit is in the voltage-regulated charging mode, the voltage-regulated charging circuit charges the battery module 203 of the electronic device.

[0131] In the embodiment of the present disclosure, the control unit is connected to the fourth switch, the fifth switch and the sixth switch, and can adjust the output voltage by controlling the on-time and off-time of the four switches, the fifth switch and the sixth switch. It can also control the switching states of the four switches, the fifth switch and the sixth switch to enable the voltage-regulated charging circuit to operate in different charging states.

[0132] In the embodiment of the present disclosure, the above-mentioned charging interface may include: a Micro-USB interface, a Type-C interface, a Lightning interface, etc., and the embodiment of the present disclosure is not limited to this.

[0133] The connector of the charging interface may be a connector for connecting to an external power source, or a connector for connecting to an input end of a charging circuit, which is not limited in the embodiment of the present disclosure.

[0134] In some embodiments, as Figure 2 As shown, the connector of the charging interface includes: a flexible circuit board 201 connecting the charging interface and the input end, and / or a data line 300 connecting the charging interface and the external power supply.

[0135] In the embodiment of the present disclosure, Figure 2 As shown, the parasitic inductance formed by the flexible circuit board 201 may include a first inductance L f1 and the second inductor Lf2 The parasitic inductance formed by the data line 300 may include a third inductor L c1 and the fourth inductor L c2 .

[0136] Here, it can be the first inductor L formed on the flexible circuit board f1 and the second inductor L f2 The inductance parameters required to form the voltage regulation charging circuit can also be the third inductance L formed on the data line c1 and the fourth inductor L c2 The inductance parameter required to constitute the voltage regulating charging circuit can also be the first inductance L formed on the flexible circuit board. f1 and the second inductor L f2 And the third inductor L formed on the data line c1 and the fourth inductor L c2 The inductance parameters required to form the voltage regulating charging circuit.

[0137] It can be understood that the voltage-regulated charging circuit can not only use the fourth switch, the fifth switch, the sixth switch and the second energy storage unit in the charge pump circuit, but also use the parasitic inductance formed on the flexible circuit board and the parasitic inductance formed on the data line. This can further reduce the devices required to implement voltage-regulated charging on the basis of enriching the charging circuit function, thereby reducing the complexity of the circuit layout.

[0138] Moreover, compared with the existing voltage-regulated charging circuit having a low-voltage side inductor, the loss of the current flowing through the low-voltage side inductor is greater than that of the high-voltage side inductor, resulting in low efficiency. In the charging circuit of the embodiment of the present disclosure, the inductance parameters of the step-down part in the voltage-regulated charging can be realized by the parasitic inductance formed by the data line and / or the flexible circuit board, and there is no need to set the low-voltage side inductor. Therefore, the large loss caused by setting the low-voltage side inductor can be reduced, and the charging efficiency of the voltage-regulated charging can be improved.

[0139] In some embodiments, as Figure 2 As shown, when the fourth switch S4 and the sixth switch S6 are both in the on state and the fifth switch S5 is in the off state, the second energy storage unit 107 can charge the third energy storage unit 108 and the battery module 203 of the electronic device.

[0140] In the disclosed embodiment, when the fourth and sixth switches are both on and the fifth switch is off, the voltage applied across the parasitic inductance of the connector is the difference between the input voltage of the external power supply and the voltage of the battery module. At this point, the current flowing through the parasitic inductance of the connector increases linearly, and the second and third energy storage units are connected in parallel, allowing the second energy storage unit to charge the third energy storage unit and the battery module.

[0141] It can be understood that the embodiment of the present disclosure can enable the second energy storage unit to charge the third energy storage unit and the battery module by controlling the fourth switch, the fifth switch and the sixth switch.

[0142] In some embodiments, as Figure 2 As shown, when the fourth switch S4 and the sixth switch S6 are both in the open state, and the fifth switch S5 is in the closed state, the second energy storage unit 107 and the third energy storage unit 108 are both in the charging state.

[0143] Here, the second energy storage unit and the third energy storage unit are in a charging state, and correspondingly, the second energy storage unit and the third energy storage unit are being charged, that is, the second energy storage unit and the third energy storage unit store energy.

[0144] In the embodiment of the present disclosure, when the fourth switch and the sixth switch are both in the open state and the fifth switch is in the closed state, the voltage applied across the parasitic inductance of the connector is Vin-2Vbat. At this time, the current flowing through the parasitic inductance of the connector decreases, and the second energy storage unit and the third energy storage unit are both in the charging state, that is, the second energy storage unit and the third energy storage unit are being charged.

[0145] Wherein, Vin represents the input voltage of the external power supply, and Vbat represents the voltage of the battery module.

[0146] It can be understood that the embodiment of the present disclosure can realize energy storage of the second energy storage unit and the third energy storage unit by controlling the fourth switch, the fifth switch and the sixth switch.

[0147] The present disclosure also provides a charging circuit. Figure 3 As shown, the charging circuit includes:

[0148] Input terminal 101;

[0149] The output terminal 102 is connected to the battery module 203;

[0150] A charge pump circuit includes a first switch module 103 and a first energy storage unit 104. The first switch module 103 is connected to a first connection line between the input terminal 101 and the output terminal 102. The first energy storage unit 104 is connected to the input terminal 101 and a node 105, respectively. The node 105 is formed on a second connection line between the input terminal 101 and the output terminal 102. The first connection line is connected to the positive electrode of a battery module 203 in the electronic device, and the second connection line is connected to the negative electrode of the battery module 203.

[0151] a second switch module 106 connected to a connection line between the node 105 and the first energy storage unit 104;

[0152] a control unit, connecting the first switch module 103 and the second switch module 106;

[0153] When the first switch module 103 is controlled to be in the on state and the second switch module 106 is in the off state, the charging circuit is in the voltage regulation charging mode;

[0154] When the second switch module 106 is controlled to be in the on state, the charging circuit is in a charge pump mode.

[0155] It is understood that the charging circuit of the embodiment of the present disclosure can charge in two different charging modes: it can operate in a voltage-regulated charging mode to adjust the charging output voltage, and it can also operate in a charge pump mode to improve charging efficiency. Therefore, the charging circuit of the embodiment of the present disclosure integrates the functions of a charge pump circuit and a voltage-regulated circuit, making the charging circuit more functional. Moreover, compared to the existing separate designs of charge pump circuit and voltage-regulated circuit, the embodiment of the present disclosure enables the charging circuit to have both charge pump mode and voltage-regulated charging mode by adding a first switch, which can reduce the number of charging components used and reduce the complexity and packaging cost of the charging circuit.

[0156] To better understand the charging circuit of one or more of the above embodiments, the present disclosure further provides the following examples:

[0157] Figure 4A FIG. 1 is a schematic diagram of an existing voltage regulating circuit according to an exemplary embodiment. Figure 4A As shown, the existing voltage regulation circuit is connected to the charging port and consists of a first transistor M1, a second transistor M2, a low-voltage side inductor L1, and a fourth energy storage unit C1. It can adjust the output voltage to achieve adjustable voltage charging. After achieving adjustable voltage charging, in order to achieve fast charging, a charge pump with higher charging efficiency is usually required in parallel.

[0158] Figure 4B FIG. 1 is a schematic diagram of an existing charge pump according to an exemplary embodiment. Figure 4B As shown, the existing charge pump is connected to the charging interface and consists of a third transistor M3, a fourth transistor M4, a fifth transistor M5, a sixth transistor M6, a seventh transistor M7, a fifth energy storage unit C2, a sixth energy storage unit C3 and a seventh energy storage unit C4. In the traditional charging architecture, after the input source is output from the charger, it passes through the data line, the charging interface, and the flexible circuit board in the mobile phone to the mainboard. Figure 4A The existing voltage regulation circuit shown and Figure 4B The existing charge pump shown is used to achieve charging or fast charging.

[0159] It should be noted that if Figure 4A and Figure 4B As shown, the existing voltage regulator circuit and the existing charge pump do not work simultaneously, which results in some charging devices not being fully utilized. In addition, the existing voltage regulator circuit has high losses and low efficiency due to the presence of low-voltage side inductors compared to high-voltage side inductors.

[0160] Based on this, the embodiment of the present disclosure proposes a charging circuit, such as Figure 2 As shown, relative to Figure 4A The existing voltage regulation circuit and Figure 4B Unlike existing charge pumps, the charging circuit of the disclosed embodiments integrates the functions of a voltage regulator circuit and a charge pump, forming a new voltage-regulated charge pump architecture. This voltage-regulated charge pump architecture, by adding a first switch, enables both voltage-regulated charging and charge pump charging. This not only saves a switch and an inductor, but also allows the integration of two charging chips into one. Furthermore, because the charge pump circuit components are shared when implementing the voltage-regulated charging function, not only chip packaging costs but also circuit costs for shared components are reduced, thereby improving circuit integration.

[0161] Moreover, the inductance parameters of the step-down part of the charging circuit in the voltage-regulated charging of the embodiment of the present disclosure can be realized by the parasitic inductance of the data line and / or the flexible circuit board, and there is no need to set the low-voltage side inductor. Therefore, the large loss caused by setting the low-voltage side inductor can be reduced, and the charging efficiency of the voltage-regulated charging can be improved.

[0162] The present disclosure also provides an electronic device, such as Figure 5 As shown, the electronic equipment includes:

[0163] Charging interface 202, flexible circuit board 201 and battery module 203;

[0164] The charging circuit 204 as described in one or more of the above embodiments;

[0165] The input end of the charging circuit 204 is connected to the charging interface 202 through the flexible circuit board 201;

[0166] The output end of the charging circuit 204 is connected to the battery module 203 .

[0167] like Figure 5 As shown, the charging interface 202 of the electronic device can be connected to an external power source V via a data line 300. in .

[0168] In an embodiment of the present disclosure, an electronic device includes a charging circuit. The charging circuit of the present disclosure can charge in two different charging modes: operating in a voltage regulation charging mode to adjust the charging output voltage, and operating in a charge pump mode to improve charging efficiency. Therefore, the charging circuit of the present disclosure integrates the functions of a charge pump circuit and a voltage regulation circuit, enriching the functionality of the charging circuit.

[0169] Moreover, compared with the existing separate designs of charge pump circuit and voltage regulation circuit, the embodiment of the present disclosure enables the charging circuit to have a charge pump mode and a voltage regulation charging mode by adding a second switch module, which can reduce the number of charging devices used. It not only improves the integration of the charging circuit, reduces the space occupied by the charging circuit on the motherboard, but also reduces the complexity and packaging cost of the charging circuit.

[0170] In some embodiments, as Figure 2 and Figure 5 As shown, the parasitic inductance formed by the flexible circuit board 201 includes a first inductance L f1 and the second inductor L f2 ;

[0171] The first inductor L f1 , one end is connected to the positive electrode of the charging interface 202 , and the other end is connected to the first energy storage unit 104 of the charging circuit 204 and the first end of the second switch through the input end 101 of the charging circuit 204 ;

[0172] The second inductor L f2 One end is connected to the negative electrode of the charging interface 202 , and the other end is connected to the first end of the first switch and the first end of the sixth switch of the charging circuit 204 through the input end 101 .

[0173] In the embodiment of the present disclosure, the first inductor and the second inductor of the flexible circuit board can constitute some components required for the voltage-regulated charging circuit, thereby eliminating the inductance of the charging circuit and reducing the complexity and packaging cost of the charging circuit.

[0174] Here, the first inductor and the second inductor may be parasitic inductors formed by the flexible circuit board. The first inductor and the second inductor may be the same inductor or different inductors, which is not limited in the embodiment of the present disclosure.

[0175] It can be understood that in the embodiment of the present disclosure, the inductance parameters of the step-down part of the charging circuit of the electronic device in the voltage-regulated charging are realized by the first inductor and the second inductor of the flexible circuit board, and there is no need to set the low-voltage side inductor. Therefore, it can reduce the large loss caused by setting the low-voltage side inductor, and can improve the charging efficiency of the voltage-regulated charging.

[0176] Figure 66 is a block diagram of an electronic device according to an exemplary embodiment. For example, the electronic device 600 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0177] Reference Figure 6 , the electronic device 600 may include one or more of the following components: a processing component 602 , a memory 604 , a power component 606 , a multimedia component 608 , an audio component 610 , an input / output (I / O) interface 612 , a sensor component 614 , and a communication component 616 .

[0178] The processing component 602 generally controls the overall operation of the electronic device 600, such as operations associated with at least one of display, phone calls, data communications, camera operation, and recording operations. The processing component 602 may include one or more processors 620 to execute instructions to perform all or part of the steps of the above-described method. In addition, the processing component 602 may include one or more modules to facilitate interaction between the processing component 602 and other components. For example, the processing component 602 may include a multimedia module to facilitate interaction between the multimedia component 608 and the processing component 602.

[0179] The memory 604 is configured to store various types of data to support operations on the electronic device 600. Examples of such data include at least one of the following: instructions for any application or method operating on the electronic device 600, contact data, phone book data, messages, pictures, and videos. The memory 604 can be implemented by any type of volatile or non-volatile storage device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0180] The power supply component 606 provides power to various components of the electronic device 600. The power supply component 606 may include at least one of the following: a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 600.

[0181] The multimedia component 608 includes a screen that provides an output interface between the electronic device 600 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, slides, and gestures on the touch panel. The touch sensor can not only sense the boundaries of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 608 includes a front camera and / or a rear camera. When the electronic device 600 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.

[0182] The audio component 610 is configured to output and / or input audio signals. For example, the audio component 610 includes a microphone (MIC), which is configured to receive external audio signals when the electronic device 600 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 604 or transmitted via the communication component 616. In some embodiments, the audio component 610 also includes a speaker for outputting audio signals.

[0183] I / O interface 612 provides an interface between processing component 602 and peripheral interface modules, such as a keyboard, click wheel, and buttons. These buttons may include, but are not limited to, a home button, volume buttons, a start button, and a lock button.

[0184] The sensor assembly 614 includes one or more sensors for providing various aspects of the status assessment of the electronic device 600. For example, the sensor assembly 614 can detect the open / closed state of the electronic device 600, the relative positioning of components, such as the display and keypad of the electronic device 600. The sensor assembly 614 can also detect changes in the position of the electronic device 600 or a component thereof, the presence or absence of user contact with the electronic device 600, the orientation or acceleration / deceleration of the electronic device 600, and changes in the temperature of the electronic device 600. The sensor assembly 614 can include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 614 can also include an optical sensor, such as a complementary metal oxide semiconductor (CMOS) or charge coupled device (CCD) image sensor, for use in imaging applications. In some embodiments, the sensor assembly 614 can also include, but is not limited to, at least one of the following: an accelerometer, a gyroscope, a magnetic sensor, a pressure sensor, and a temperature sensor.

[0185] The communication component 616 is configured to facilitate communication between the electronic device 600 and other devices in a wired or wireless manner. The electronic device 600 can access a wireless network based on a communication standard, such as Wi-Fi, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 616 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 616 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0186] In an exemplary embodiment, the electronic device 600 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0187] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is further provided, such as a memory 604 including executable instructions or a computer program. The instructions or computer program can be executed by a processor 620 of the electronic device 600 to perform the above method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0188] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the claims.

[0189] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A charging circuit, characterized in that: include: Input and output terminals; A charge pump circuit, comprising a first switch module and a first energy storage unit, wherein the first switch module is connected to a first connection line between the input end and the output end, the first energy storage unit is connected to the input end and a node respectively, and the node is formed on a second connection line between the input end and the output end; a second switch module connected to a connection line between the node and the first energy storage unit; Wherein, when the first switch module is in the on state and the second switch module is in the off state, the charging circuit is in the voltage regulation charging mode; When the second switch module is in the on state, the charging circuit is in a charge pump mode.

2. The charging circuit according to claim 1, wherein: The second switch module includes a first switch; the first switch module includes: a second switch and a third switch; The first end of the second switch is connected to the input end; The second end of the second switch is connected to the second end of the third switch; The first end of the third switch is connected to the output end; The first energy storage unit has one end connected to the first end of the second switch and the other end connected to the second end of the first switch; The first end of the first switch is connected to the node; The control end of the first switch, the control end of the second switch, and the control end of the third switch are respectively connected to the first control signal; When the second switch and the third switch are both connected, the first switch module is in the on state.

3. The charging circuit according to claim 1, wherein: The charge pump circuit further includes: a second energy storage unit, a third energy storage unit, a fourth switch, a fifth switch and a sixth switch; The second end of the fourth switch is connected to the first end of the third switch in the first switch module; The first end of the fourth switch and the second end of the fifth switch are both connected to the output end; The first end of the fifth switch is connected to the second end of the sixth switch; The second energy storage unit has one end connected to the connection line between the first end of the third switch and the second end of the fourth switch, and the other end connected to the connection line between the first end of the fifth switch and the second end of the sixth switch; The third energy storage unit has one end connected to the output end and the other end connected to the first end of the sixth switch; The control end of the fourth switch, the control end of the fifth switch, and the control end of the sixth switch are respectively connected to a second control signal.

4. The charging circuit according to claim 3, wherein: The charging circuit is applied to an electronic device having a charging interface; When the charging interface is connected to an external power source, the parasitic inductance formed by the connector of the charging interface, the fourth switch, the fifth switch, the sixth switch, and the second energy storage unit can constitute a voltage-regulated charging circuit; When the charging circuit is in the voltage-regulated charging mode, the voltage-regulated charging circuit charges the battery module of the electronic device.

5. The charging circuit according to claim 4, characterized in that: The connector of the charging interface includes: a flexible circuit board connecting the charging interface and the input end, and / or a data line connecting the charging interface and the external power supply.

6. The charging circuit according to claim 3, characterized in that: When the fourth switch and the sixth switch are both in an open state, and the fifth switch is in a closed state, the second energy storage unit and the third energy storage unit are both in a charging state.

7. The charging circuit according to claim 3, wherein: When the fourth switch and the sixth switch are both in the on state and the fifth switch is in the off state, the second energy storage unit can charge the third energy storage unit and the battery module of the electronic device.

8. A charging circuit, characterized in that: include: Input terminal; Output end, connected to the battery module; A charge pump circuit, comprising a first switch module and a first energy storage unit, wherein the first switch module is connected to a first connection line between the input end and the output end, the first energy storage unit is connected to the input end and a node respectively, and the node is formed on a second connection line between the input end and the output end; The first connecting line is connected to the positive electrode of the battery module in the electronic device, and the second connecting line is connected to the negative electrode of the battery module; a second switch module connected to a connection line between the node and the first energy storage unit; a control unit, connecting the first switch module and the second switch module; When the first switch module is controlled to be in an on state and the second switch module is in an off state, the charging circuit is in a voltage regulation charging mode; When the second switch module is controlled to be in the on state, the charging circuit is in a charge pump mode.

9. An electronic device, characterized in that: include: Charging port, flexible circuit board and battery module; The charging circuit according to any one of claims 1 to 8; Wherein, the input end of the charging circuit is connected to the charging interface through the flexible circuit board; The output end of the charging circuit is connected to the battery module.

10. The electronic device according to claim 9, wherein: The parasitic inductance formed by the flexible circuit board includes a first inductance and a second inductance; The first inductor has one end connected to the positive electrode of the charging interface, and the other end connected to the first energy storage unit of the charging circuit and the first end of the second switch of the charging circuit through the input end of the charging circuit; One end of the second inductor is connected to the negative electrode of the charging interface, and the other end is connected to the first end of the first switch and the first end of the sixth switch of the charging circuit through the input end.

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