Switched capacitor circuit and bidirectional switching converter including same

Abstract

A switched capacitor circuit includes first, third, fifth and seventh switches connected to each other, second, fourth, sixth and eighth switches connected to each other, ninth and tenth switches connected to each other, eleventh and twelfth switches connected to each other, thirteenth and fourteenth switches connected to each other, and fifteenth and sixteenth switches connected to each other, the first capacitor is arranged between the first switch and the ninth switch, the second capacitor is arranged between the second switch and the fifteenth switch, the third capacitor is arranged between the third switch and the eleventh switch, the fourth capacitor is arranged between the fourth switch and the thirteenth switch, the fifth capacitor is arranged between the sixth switch and the eleventh switch, and the sixth capacitor is arranged between the fifth switch and the thirteenth switch. Wherein one end of each of the first and second switches is connected to an input node, and one end of each of the ninth, eleventh, thirteenth, fifteenth, seventh, and eighth switches is connected to an output node.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on Korean Patent Application No. 10-2023-0107929 filed in the Korean Intellectual Property Office on August 17, 2023 and Korean Patent Application No. 10-2024-0008300 filed in the Korean Intellectual Property Office on January 18, 2024, and claims priority under 35 U.S.C. §119, the disclosures of which are incorporated herein by reference in their entirety. Background Art

[0003] The inventive concept relates to a switched capacitor circuit and a directional switching converter including the switched capacitor circuit.

[0004] Switched capacitor converters are widely used for ultra-fast charging of mobile systems (eg, smartphones, tablet computers, etc.).

[0005] A switched capacitor converter is a circuit that combines a semiconductor switching element (hereinafter referred to as a "switch") with a capacitor without using an inductor, and can change the connection between the capacitor and the switch by turning the switch on / off, thereby changing the relationship between the input voltage and the output voltage.

[0006] In mobile systems, switched capacitor converters are mainly operated with a voltage conversion ratio (ratio of input voltage to output voltage) of 2: 1. However, as the power consumption of mobile systems has recently increased and the operating voltage of power-consuming elements (e.g., core, peripheral circuits, etc.) within the system has decreased, converters with a voltage conversion ratio exceeding 2: 1 are required.

[0007] Additionally, since a relatively large amount of power may need to be supplied to the mobile system during fast charging, a voltage supplied to the mobile system may need to be relatively large. Summary of the invention

[0008] Some example embodiments of the inventive concepts provide a switched capacitor circuit having a circuit structure corresponding to a plurality of voltage conversion ratios through a switching operation.

[0009] According to some example embodiments of the inventive concept, the switched capacitor circuit may include: a first switch having one end connected to an input node and the other end connected to a first node; a second switch having one end connected to the input node and the other end connected to a second node; a third switch having one end connected to the first node and the other end connected to a third node; a fourth switch having one end connected to the second node and the other end connected to a fourth node; a fifth switch having one end connected to the third node and the other end connected to a fifth node; a sixth switch having one end connected to the fourth node and the other end connected to the sixth node; a seventh switch having one end connected to the fifth node and the other end connected to an output node; an eighth switch having one end connected to the sixth node and the other end connected to the output node; a ninth switch having one end connected to the output node and the other end connected to the seventh node; a tenth switch having one end connected to the seventh node and the other end connected to a first ground node; an eleventh switch, one end of which is connected to the output node and the other end is connected to the ninth node; a twelfth switch, one end of which is connected to the ninth node and the other end is connected to the second ground node; a thirteenth switch, one end of which is connected to the output node and the other end is connected to the tenth node; a fourteenth switch, one end of which is connected to the tenth node and the other end is connected to the third ground node; a fifteenth switch, having one end connected to the output node and the other end connected to the eighth node; a sixteenth switch, having one end connected to the eighth node and the other end connected to the fourth ground node; a first capacitor, which is connected between the first node and the seventh node; a second capacitor connected between the second node and the eighth node; a third capacitor, which is connected between the third node and the ninth node; a fourth capacitor connected between the fourth node and the tenth node; a fifth capacitor, which is connected between the sixth node and the ninth node; and a sixth capacitor connected between the fifth node and the tenth node.

[0010] According to some example embodiments of the present invention, a bidirectional switching converter may include a switching capacitor circuit and a switch controller. The switching capacitor circuit may include a first switch, one end of which is connected to a first input / output node and the other end is connected to the first node; a second switch, one end of which is connected to the first input / output node and the other end is connected to the second node; a third switch, one end of which is connected to the first node and the other end is connected to the third node; a fourth switch, one end of which is connected to the second node and the other end is connected to the fourth node; a fifth switch, one end of which is connected to the third node and the other end is connected to the fifth node; a sixth switch, one end of which is connected to the fourth node and the other end is connected to the sixth node; a seventh switch, one end of which is connected to the fifth node and the other end is connected to the second input / output node; an eighth switch, one end of which is connected to the sixth node and the other end is connected to the second input / output node; a ninth switch, one end of which is connected to the second input / output node and the other end is connected to the seventh node; a tenth switch, one end of which is connected to the seventh node and the other end is connected to the first ground node; an eleventh switch, one end of which is connected to the seventh node and the other end is connected to the first ground node; a switch, one end of which is connected to the second input / output node and the other end is connected to the ninth node; a twelfth switch, one end of which is connected to the ninth node and the other end is connected to the second grounding node; a thirteenth switch, one end of which is connected to the second input / output node and the other end is connected to the tenth node; a fourteenth switch, one end of which is connected to the tenth node and the other end is connected to the third grounding node; a fifteenth switch, one end of which is connected to the second input / output node and the other end is connected to the eighth node; a sixteenth switch, one end of which is connected to the eighth node and the other end is connected to the fourth grounding node; a first capacitor connected between the first node and the seventh node; a second capacitor connected between the second node and the eighth node; a third capacitor connected between the third node and the ninth node; a fourth capacitor connected between the fourth node and the tenth node; a fifth capacitor connected between the sixth node and the ninth node; and a sixth capacitor connected between the fifth node and the tenth node. The switch controller may be configured to generate first to sixteenth control signals to control the first to sixteenth switches, respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Example embodiments will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0012] Figure 1 is a schematic block diagram of an electronic device including a charger integrated circuit according to some example embodiments;

[0013] Figure 2 is a diagram of an electronic device according to some example embodiments;

[0014] Figure 3 is a circuit diagram of a switched capacitor circuit according to some example embodiments;

[0015] Figure 4 is a timing diagram of control signals during a 4:1 buck conversion operation according to some example embodiments;

[0016] Figure 5 and Figure 6 are circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments;

[0017] Figure 7 and Figure 8 are equivalent circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments;

[0018] Fig. 9 is a timing diagram of control signals during a 3:1 buck conversion operation according to some example embodiments;

[0019] Fig.10 and Fig.11 are circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments;

[0020] Fig.12 and Fig.13 are equivalent circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments;

[0021] Fig.14 is a timing diagram of control signals during a 2:1 buck conversion operation according to some example embodiments;

[0022] Fig.15 and Fig.16 are circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments; and

[0023] Fig.17 and Fig.18 2 are equivalent circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments. DETAILED DESCRIPTION

[0024] Hereinafter, some example embodiments are described in detail with reference to the accompanying drawings.

[0025] In order to clearly explain the inventive concept in the accompanying drawings, parts not related to the description are omitted, and similar parts are given similar reference numerals throughout the specification. In the flowcharts described with reference to the accompanying drawings, the order of operations can be changed, several operations can be combined, some operations can be divided, and some operations can be not performed.

[0026] Throughout the specification, the term "connected" not only means that two or more constituent parts are directly connected, but also may mean that two or more constituent parts are indirectly connected through another constituent part. In addition, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising" will be understood to imply the inclusion of the elements but not the exclusion of any other elements.

[0027] It should be understood that its elements and / or properties may be recorded herein as being "equivalent", "same" or "equal" to other elements, and it should also be understood that elements and / or properties recorded herein as being "equivalent", "same" or "equal" to other elements may be "equivalent", "same" or "equal" or "substantially equivalent", "substantially identical" or "substantially equivalent" to other elements and / or properties. Elements and / or properties that are "substantially equivalent", "substantially identical" or "substantially equal" to other elements and / or their properties will be understood to include elements and / or properties that are equivalent, identical or equal to other elements and / or their properties within manufacturing tolerances and / or material tolerances. Elements and / or properties that are equivalent or substantially equivalent, equal or substantially equivalent and / or identical or substantially identical to other elements and / or their properties may be identical or substantially identical in structure, identical or substantially identical in function and / or identical or substantially identical in composition. Although the terms "same", "equal" or "equivalent" may be used in the description of some example embodiments, it should be understood that there may be some imprecision. Thus, when an element or property is referred to as being the same, equal or identical to another element or property, it should be understood that the element or property is the same as the other element or property within a desired manufacturing or operating tolerance range (eg, ±10%).

[0028] It will be understood that elements and / or properties thereof described herein as being "substantially" the same, equal and / or equivalent include elements and / or properties thereof having a relative difference in size equal to or less than 10%. In addition, regardless of whether elements and / or properties thereof are modified as "substantially", it will be understood that these elements and / or properties thereof should be interpreted as including manufacturing or operating tolerances (e.g., ±10%) around the elements and / or properties thereof.

[0029] When the terms "about" or "substantially" are used in conjunction with a numerical value in this specification, it is intended that the associated numerical value includes manufacturing or operating tolerances (e.g., ±10%) around the numerical value. In addition, when the words "about" and "substantially" are used in conjunction with a geometric shape, it is intended that the accuracy of the geometric shape is not required, but rather the tolerance of the shape is within the scope of the present disclosure. In addition, regardless of whether a numerical value or shape is modified as "about" or "substantially", it will be understood that these values ​​and shapes should be interpreted as including manufacturing or operating tolerances (e.g., ±10%) around the numerical value or shape. When a range is specified, the range includes all values ​​therebetween, such as increments of 0.1%.

[0030] As described herein, when an operation is described as being performed, or an effect such as a structure is described as being established “by” or “through” performing an additional operation, it will be understood that the operation may be performed and / or the effect / structure may be established “based on” the additional operation, which may include performing the additional operation alone or in combination with other additional operations.

[0031] Figure 1 is a schematic block diagram of an electronic device including a charger integrated circuit according to some example embodiments.

[0032] refer to Figure 1 , the electronic device 10 may include a charger integrated circuit (IC) 100 and a battery 200. In addition, the electronic device 10 may also include a main processor and peripheral devices. For example, the electronic device 10 may include a mobile device such as a smart phone, a tablet personal computer (PC), a mobile phone, a personal digital assistant (PDA), a laptop computer, a wearable device, a global positioning system (GPS) device and an e-book terminal, a digital broadcast terminal, an MP3 player, a digital camera, etc. For example, the electronic device 10 may include an electric vehicle.

[0033] The battery 200 may be built into the electronic device 10 (e.g., included as part of the electronic device 10, located inside the electronic device 10, non-removably integrated into the electronic device 10, etc.). In some example embodiments, the battery 200 may be removed from the electronic device 10 (e.g., may be detachably coupled to, reversibly coupled to, etc.). The battery 200 may include a battery cell or a plurality of battery cells. The plurality of battery cells may be connected in series or in parallel (e.g., connected in series or in parallel with the charger IC 100). The battery 200 may supply power to the electronic device 10 when an external charging device is not connected to the electronic device 10 (e.g., in response to the electronic device 10 not being connected to any external charging device).

[0034] The charger IC 100 may charge the battery 200 and may be referred to as a "battery charger". In addition, the charger IC 100 may supply power to an external device (e.g., a wired interface or a wireless interface) connected to the charger IC 100 based on a voltage for charging the battery 200. For example, the charger IC 100 may be implemented as an integrated circuit chip and may be mounted on a printed circuit board.

[0035] The charger IC 100 may include a bidirectional switching converter 110 and a switch controller 120. The bidirectional switching converter 110 may be implemented as a DC-DC converter, and may generate an output voltage by stepping down or stepping up an input voltage.

[0036] The bidirectional switching converter 110 may operate in a buck mode, a boost mode, or a buck-boost mode.

[0037] In the buck mode, bidirectional switching converter 110 may perform a buck conversion operation through a first switching operation to lower an input voltage and charge battery 200 based on the lowered voltage.

[0038] In the boost mode, bidirectional switching converter 110 may perform a boost conversion operation through a second switching operation to boost a voltage input from battery 200 and supply power to an external device based on the boosted voltage.

[0039] In the buck-boost mode, bidirectional switching converter 110 can perform a buck conversion operation or a boost conversion operation according to the load current through a third switching operation. In the buck-boost mode, bidirectional switching converter 110 can charge battery 200 or supply power to an external device.

[0040] The switch controller 120 can control mode switching between multiple charging modes (such as buck mode, boost mode and buck-boost mode) of the bidirectional switching converter 110, and can control the switching operation of the bidirectional switching converter 110 so that the voltage level of the output voltage is the same as or similar to the target voltage level in the multiple charging modes.

[0041] In order to operate properly even under power saving conditions, the charger IC 100 can support at least one of various functions, such as an undervoltage lockout (UVLO) function, an overcurrent protection (OCP) function, an overvoltage protection (OVP) function, a soft start function for reducing inrush current, a foldback current limiting function, a hiccup mode function for short circuit protection, an overtemperature protection (OTP) function, etc.

[0042] In some example embodiments, the electronic device 10 may support wired charging and wireless charging (e.g., wired charging and wireless charging of the electronic device 10), and may include a first power interface 310 and a second power interface 320 for wired charging and wireless charging, respectively. In some example embodiments, the first power interface 310 may be implemented as a wired power interface and may include a wired charging circuit.

[0043] The second power interface 320 is implemented as a wireless power interface, and may include a wireless charging circuit.

[0044] In buck mode (e.g., based on the bidirectional switching converter 110 operating in buck mode), the charger IC 100 can receive a first input voltage CHGIN from the first power interface 310 and / or a second input voltage WCIN from the second power interface 320, and the charger IC 100 can charge the battery 200 based on the first input voltage CHGIN and / or the second input voltage WCIN.

[0045] In boost mode (eg, based on bidirectional switching converter 110 operating in boost mode), charger IC 100 may provide power to first power interface 310 and / or second power interface 320 based on the power of battery 200 (eg, based on using battery 200 as a power source).

[0046] In the buck-boost mode (e.g., based on the bidirectional switching converter 110 operating in the buck-boost mode), the charger IC 100 may receive the first input voltage CHGIN from the first power interface 310 or the second input voltage WCIN from the second power interface 320, the charger IC 100 may charge the battery 200 based on the first input voltage CHGIN or the second input voltage WCIN, and the charger IC 100 may provide power to the first power interface 310 or the second power interface 320 based on the first input voltage CHGIN or the second input voltage WCIN. In some example embodiments, the charger IC 100 may provide power to the second power interface 320 based on the first input voltage CHGIN and the voltage of the battery 200, or the charger IC 100 may provide power to the first power interface 310 based on the second input voltage WCIN and the voltage of the battery 200.

[0047] For example, a travel adapter (TA) or an auxiliary battery may be electrically connected to the first power interface 310. The TA may provide power to the electronic device 10 by converting power supplied from a household power source of AC 100V to 220V or from other power supply devices (e.g., a computer) into DC power that may be required to charge the battery 200. In a buck mode or a buck-boost mode (e.g., based on the bidirectional switching converter 110 operating in the buck mode or the buck-boost mode), the charger IC 100 may charge the battery 200 or provide power to the second power interface 320 by using a first input voltage CHGIN received from the TA or the auxiliary battery.

[0048] For example, a mobile (On-The-Go, OTG) device (e.g., an OTG USB device, etc.) can be connected to the first power interface 310, and the charger IC 100 can provide power to the OTG device through the first power interface 310. The bidirectional switching converter 110 can provide power to the OTG device based on the power of the battery 200 in the boost mode, or can simultaneously charge the battery 200 and provide power to the OTG device in the buck mode based on the second input voltage WCIN from the second power interface 320.

[0049] The bidirectional switching converter 110 according to some example embodiments may include a switched capacitor circuit 111 .

[0050] The switch capacitor circuit 111 may include a plurality of capacitors and switches. In buck mode (e.g., based on the bidirectional switch converter 110 operating in buck mode), the switch capacitor circuit 111 may reduce the input voltage based on various voltage conversion ratios (e.g., based on one of the plurality of voltage conversion ratios), and may charge the battery 200 based on the reduced voltage. For example, the switch capacitor circuit 111 may reduce the input voltage based on one of the voltage conversion ratios of 4:1, 3:1, or 2:1. The switch controller 120 may control the switch capacitor circuit 111 so that the input voltage is reduced based on one of the voltage conversion ratios of 4:1, 3:1, or 2:1.

[0051] The switched capacitor circuit 111 according to some example embodiments may have a cross-coupled structure. That is, the first structure and the second structure of the switched capacitor circuit 111 are the same structure (e.g., the same or mirrored configuration of switches, nodes, and capacitors), and the first structure and the second structure thereof may be cross-coupled with each other. Therefore, the complexity of the design and process of the switched capacitor circuit 111 may be reduced. As a result, due to the reduction in the design complexity and process of the switched capacitor circuit 111, the possibility of process defects in the switched capacitor circuit 111 may be reduced, and therefore, due to the reduced possibility of process defects, the switched capacitor circuit 111 and the bidirectional switching converter 110, the charger IC 100, and the electronic device 10 including the charger IC 100 may have improved reliability. Since the switched capacitor circuit 111 reduces the input voltage based on various voltage conversion ratios, the same voltage may be provided to the battery 200 even if the input voltage changes. Therefore, the bidirectional switching converter 110, the charger IC 100, and the electronic device 10 including the charger IC 100 can have improved versatility and thus improved functionality based on being configured to provide a voltage having a specific voltage level (e.g., voltage amplitude) even when the input voltage has various voltage levels.

[0052] In the boost mode (e.g., based on the bidirectional switching converter 110 operating in the boost mode), the switch capacitor circuit 111 can increase the input voltage provided from the battery 200 based on various voltage conversion ratios, and can provide the increased voltage to the first power interface 310 or the second power interface 320. For example, the switch capacitor circuit 111 can increase the input voltage based on one of the voltage conversion ratios of 1:4, 1:3, or 1:2. The switch controller 120 can control the switch capacitor circuit 111 so that the input voltage is reduced based on one of the voltage conversion ratios of 4:1, 3:1, or 2:1. Here, some example embodiments of the operation of the charger IC, the bidirectional switching converter 110, the switch capacitor circuit 111, and / or the switch controller 120 according to the buck mode are mainly described. However, it is obvious that the description of the buck mode also applies to the boost mode.

[0053] Figure 2 is a diagram of an electronic device according to some example embodiments.

[0054] refer to Figure 2, the electronic device 10 may include a bidirectional switching converter 110, a switch controller 120, and a battery 200. In buck mode (e.g., based on the bidirectional switching converter 110 operating in buck mode), the bidirectional switching converter 110 may generate a voltage VSYS by reducing a voltage VCHG supplied from TA. In this document, the symbol of the voltage (e.g., VCHG, VSYS) may refer to a node at which the corresponding voltage is measured. In buck mode, the current ISYS, which is a model corresponding to the current consumed by the load, may also be referred to as a load current. The load may receive power from the node VSYS. In boost mode (e.g., based on the bidirectional switching converter 110 operating in boost mode), the bidirectional switching converter 110 may generate a voltage VCHG by increasing the voltage VBAT of the battery 200. The OTG device may receive power from the node VCHG, and in boost mode, the current consumed by the OTG device may be referred to as a load current.

[0055] The bidirectional switching converter 110 may include a switched capacitor circuit 111 , a first transistor 112 , a second transistor 113 , and a third transistor 115 .

[0056] The switch controller 120 may generate control signals C_CTRL and CTRL1 to CTRL3 based on at least one of the signals VCHG, VSYS, VBAT, ICHG, and / or IBT.

[0057] The first transistor 112 may be turned on according to the control signal CTRL1 to precharge the switch node LX based on the level of the voltage VBYP (interchangeably referred to herein as the voltage magnitude). The second transistor 113 may be turned on according to the control signal CTRL2 to discharge the switch node LX (e.g., discharge the switch node LX to ground, discharge the switch node LX to a ground node, etc.). As the voltage level of the switch node LX changes, the current flowing through the inductor 114 may change and the level of the node VSYS (e.g., the voltage magnitude at the node VSYS, the voltage node, etc.) may be determined accordingly.

[0058] The third transistor 115 may be turned on according to the control signal CTRL3 to connect the node VSYS to the battery 200 or provide a current IBAT to the battery 200 .

[0059] exist Figure 2 However, in some example embodiments, the bidirectional switching converter 110 may not include any circuits other than the switched capacitor circuit 111. Figure 2At least some of the circuits shown in (eg, some or all of the first to third transistors 112, 113, 115, inductor 114, etc. may not be included). That is, node VBYP as the output node of the switched capacitor circuit 111 may be directly connected to the node VSYS.

[0060] Figure 3 is a circuit diagram of a switched capacitor circuit 111 according to some example embodiments.

[0061] refer to Figure 3 , in buck mode (e.g., based on the bidirectional switching converter 110 operating in buck mode), the switched capacitor circuit 111 can reduce the voltage of the node Vhigh and provide the reduced voltage to the node Vlow. In boost mode (e.g., based on the bidirectional switching converter 110 operating in boost mode), the switched capacitor circuit 111 can increase the voltage of the node Vlow and provide the increased voltage to the node Vhigh. Hereinafter, some example embodiments are described in which, in buck mode, the switched capacitor circuit 111 reduces the voltage of the node Vhigh based on one of a plurality of voltage conversion ratios and provides the reduced voltage to the node Vlow. However, the switched capacitor circuit 111 can increase the voltage of the node Vlow based on at least one of a plurality of conversion ratios, and can provide the increased voltage to the node Vhigh.

[0062] The switch capacitor circuit 111 may include a first circuit structure 410 and a second circuit structure 420 that are cross-coupled with each other. The first circuit structure 410 may include the first, third, fifth, seventh, ninth, tenth, eleventh and twelfth switches SW1, SW3, SW5, SW7, SW9, SW10, SW11 and SW12 and the first, third and fifth capacitors C1, C3 and C5. The second circuit structure 420 may include the second, fourth, sixth, eighth, thirteenth, fourteenth, fifteenth and sixteenth switches SW2, SW4, SW6, SW8, SW13, SW14, SW15 and SW16, and the second, fourth and sixth capacitors C2, C4 and C6. The first switch SW1 to the sixteenth switch SW16 may each independently include an N-type transistor or a P-type transistor. In this article, the first switch SW1 to the sixteenth switch SW16 may be described as each including an N-type transistor. Therefore, when a high level signal is received at the corresponding gate terminal of the switch among the first to sixteenth switches SW1 to SW16 (e.g., in response to receiving the high level signal), each of the first to sixteenth switches SW1 to SW16 may be turned on. In addition, when a low level signal is received at the corresponding gate terminal of the switch among the first to sixteenth switches SW1 to SW16 (e.g., in response to receiving the low level signal), each of the first to sixteenth switches SW1 to SW16 may be turned off. However, example embodiments are not limited thereto.

[0063] The first to sixteenth switches SW1 to SW16 may be switched by separate corresponding control signals C_CTRL1 to C_CTRL16 provided (eg, sent) by the switch controller 120. The first to sixteenth switches SW1 to SW16 may be turned on or off based on the corresponding (corresponding) control signals. The control signals C_CTRL1 to C_CTRL16 may correspond to Figure 2 The switch controller 120 may generate control signals C_CTRL1 to C_CTRL16 based on a voltage conversion ratio between an input voltage and an output voltage to control the first to sixteenth switches SW1 to SW16, respectively. When converting a voltage according to a 4:1 voltage conversion ratio, the switch controller 120 may switch the first to sixteenth switches SW1 to SW16 by separate corresponding (e.g., corresponding) control signals C_CTRL1 to C_CTRL16, such as Figures 4 to 7 When converting the voltage according to the 3:1 voltage conversion ratio, the switch controller 120 may switch the first switch SW1 to the sixteenth switch SW16 through separate corresponding (eg, corresponding) control signals C_CTRL1 to C_CTRL16, as shown. Figures 8 to 11When converting the voltage according to the voltage conversion ratio of 2:1, the switch controller 120 may switch the first switch SW1 to the sixteenth switch SW16 through the control signals C_CTRL1 to C_CTRL16, as shown in FIG. Figures 12 to 15 For ease of explanation, Figures 4 to 16 The control signals C_CTRL1 to C_CTRL16 may be omitted.

[0064] In the first circuit structure 410, one end of the first switch SW1 may be connected to the node Vhigh (also referred to herein as an input node, an output node, or a first input / output node in some example embodiments), and the other end thereof (e.g., the other end thereof) may be connected to the first node N1. One end of the third switch SW3 may be connected to the first node N1, and the other end thereof may be connected to the third node N3. One end of the fifth switch SW5 may be connected to the third node N3, and the other end thereof may be connected to the fifth node N5. One end of the seventh switch SW7 may be connected to the fifth node N5, and the other end thereof may be connected to the node Vlow (also referred to herein as an output node, an input node, or a second input / output node in some example embodiments). One end of the ninth switch SW9 may be connected to the node Vlow, and the other end thereof may be connected to the seventh node N7. One end of the tenth switch SW10 may be connected to the seventh node N7, and the other end thereof may be connected to a ground node (e.g., ground, a first ground node, etc.). One end of the eleventh switch SW11 may be connected to the node Vlow, and the other end thereof may be connected to the ninth node N9. One end of the twelfth switch SW12 may be connected to the ninth node N9, and the other end thereof may be connected to a ground node (e.g., ground, a second ground node, etc.). It will be understood that each of the first to sixteenth switches SW1 to SW16 may be referred to as having one end connected to a certain node and another end connected to another node, wherein the switch is configured to selectively close or disconnect a conductive path between the nodes through the switch (e.g., selectively electrically connect or electrically isolate the nodes through the switch) based on a control signal sent to the switch. For example, the first switch SW1 may be understood as a switch having one end connected to an input node (e.g., Vhigh) and another end connected to the first node N1, and the first switch SW1 may therefore be understood as being configured to selectively close or disconnect a conductive path between the nodes Vhigh and N1 through the first switch SW1 (e.g., selectively electrically connect or electrically isolate the nodes through the first switch SW1) based on a first control signal C_CTRL1 received at the first switch SW1. In some example embodiments, the node Vhigh may be referred to herein as a first input / output node, and the node Vlow may be referred to herein as a second input / output node.

[0065] In the first circuit structure 410, one end of the first capacitor C1 may be connected to the first node N1, and the other end thereof may be connected to the seventh node N7, so that the first capacitor C1 may be connected between the first node N1 and the seventh node N7 (e.g., directly connected between the first node N1 and the seventh node N7). One end of the third capacitor C3 may be connected to the third node N3, and the other end thereof may be connected to the ninth node N9, so that the third capacitor C3 may be connected between the third node N3 and the ninth node N9 (e.g., directly connected between the third node N3 and the ninth node N9). One end of the fifth capacitor C5 may be connected to the sixth node N6, and the other end thereof may be connected to the ninth node N9, so that the fifth capacitor C5 may be connected between the sixth node N6 and the ninth node N9 (e.g., directly connected between the sixth node N6 and the ninth node N9).

[0066] In the second circuit structure 420, one end of the second switch SW2 may be connected to the node Vhigh, and the other end thereof may be connected to the second node N2. One end of the fourth switch SW4 may be connected to the second node N2, and the other end thereof may be connected to the fourth node N4. One end of the sixth switch SW6 may be connected to the fourth node N4, and the other end thereof may be connected to the sixth node N6. One end of the eighth switch SW8 may be connected to the sixth node N6, and the other end thereof may be connected to the node Vlow. One end of the thirteenth switch SW13 may be connected to the node Vlow, and the other end thereof may be connected to the tenth node N10. One end of the fourteenth switch SW14 may be connected to the tenth node N10, and the other end thereof may be connected to a ground node (e.g., ground, a third ground node, etc.). One end of the fifteenth switch SW15 may be connected to the node Vlow, and the other end thereof may be connected to the eighth node N8. One end of the sixteenth switch SW16 may be connected to the eighth node N8, and the other end thereof may be connected to a ground node (e.g., ground, a fourth ground node, etc.).

[0067] In the second circuit structure 420, one end of the second capacitor C2 may be connected to the second node N2, and the other end thereof may be connected to the eighth node N8, so that the second capacitor C2 may be connected between the second node N2 and the eighth node N8 (e.g., directly connected between the second node N2 and the eighth node N8). One end of the fourth capacitor C4 may be connected to the fourth node N4, and the other end thereof may be connected to the tenth node N10, so that the fourth capacitor C4 may be connected between the fourth node N4 and the tenth node N10 (e.g., directly connected between the fourth node N4 and the tenth node N10). One end of the sixth capacitor C6 may be connected to the fifth node N5 of the first circuit structure 410, and the other end thereof may be connected to the tenth node N10, so that the sixth capacitor C6 may be connected between the fifth node N5 and the tenth node N10 (e.g., directly connected between the fifth node N5 and the tenth node N10).

[0068] Figure 4 is a timing diagram of control signals during a 4:1 buck conversion operation according to some example embodiments, Figure 5 and Figure 6 are circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments, and Figure 7 and Figure 8 2 are equivalent circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments.

[0069] refer to Figure 4 During the voltage conversion, the charger IC 100 (e.g., the switched capacitor circuit 111, the switch controller 120, the bidirectional switching converter 110, or any combination thereof) may alternately operate in the first switching mode SM1 and the second switching mode SM2 (e.g., alternate between operating in the first switching mode SM1 and operating in the second switching mode SM2). Figures 4 to 8 In the embodiment, the voltage of the node Vhigh (also interchangeably referred to herein as a voltage level) can be reduced to 1 / 4, and the reduced voltage can be provided to the node Vlow. Figures 5 to 8 , the voltage of the node Vhigh (also interchangeably referred to herein as a voltage level) may be 20V, and the voltage of the node Vlow may be 5V.

[0070] The switch controller 120 may generate a first phase control signal CTRL_P1 and a second phase control signal CTRL_P2. The phase of the first phase control signal CTRL_P1 may be opposite to the phase of the second phase control signal CTRL_P2.

[0071] During the 4:1 step-down conversion operation, the switch controller 120 may provide the first phase control signal CTRL_P1 as control signals C_CTRL1, C_CTRL4, C_CTRL5, C_CTRL8, C_CTRL9, C_CTRL12, C_CTRL13, and C_CTRL16, and the switch controller 120 may provide the second phase control signal CTRL_P2 as control signals C_CTRL2, C_CTRL3, C_CTRL6, C_CTRL7, C_CTRL10, C_CTRL11, C_CTRL14, and C_CTRL15.

[0072] In the first switching mode SM1 (for example, based on the switch capacitor circuit 111, the switch controller 120, the bidirectional switching converter 110 or any combination thereof operating in the first switching mode SM1), the switch controller 120 can make the control signals C_CTRL1, C_CTRL4, C_CTRL5, C_CTRL8, C_CTRL9, C_CTRL12, C_CTRL13 and C_CTRL16 have a high level (for example, a first voltage amplitude or voltage level), and the switch controller 120 can make the control signals C_CTRL2, C_CTRL3, C_CTRL6, C_CTRL7, C_CTRL10, C_CTRL11, C_CTRL14 and C_CTRL15 have a low level (for example, a second voltage amplitude or voltage level less than the first voltage amplitude or voltage level).

[0073] In the second switching mode SM2 (for example, based on the switch capacitor circuit 111, the switch controller 120, the bidirectional switching converter 110 or any combination thereof operating in the second switching mode SM2), the switch controller 120 can make the control signals C_CTRL1, C_CTRL4, C_CTRL5, C_CTRL8, C_CTRL9, C_CTRL12, C_CTRL13 and C_CTRL16 have a low level (for example, a second voltage amplitude or voltage level), and the switch controller 120 can make the control signals C_CTRL2, C_CTRL3, C_CTRL6, C_CTRL7, C_CTRL10, C_CTRL11, C_CTRL14 and C_CTRL15 have a high level (for example, a first voltage amplitude or voltage level).

[0074] exist Figure 5In the first switching mode SM1, the first, fourth, fifth, eighth, ninth, twelfth, thirteenth and sixteenth switches SW1, SW4, SW5, SW8, SW9, SW12, SW13 and SW16 can be turned on based on the corresponding (e.g., separate, corresponding) control signals C_CTRL1, C_CTRL4, C_CTRL5, C_CTRL8, C_CTRL9, C_CTRL12, C_CTRL13 and C_CTRL16 with a high level, and the second, third, sixth, seventh, tenth, eleventh, fourteenth and fifteenth switches SW2, SW3, SW6, SW7, SW10, SW11, SW14 and SW15 can be turned off based on the control signals C_CTRL2, C_CTRL3, C_CTRL6, C_CTRL7, C_CTRL10, C_CTRL11, C_CTRL14 and C_CTRL15 with a low level. As described herein, a switch that is "on" may be interchangeably referred to as closed, a closed switch, in a closed state, in a closed position, etc., such that the switch electrically connects separate nodes to which separate ends of the switch are connected through the switch, and a switch that is "off" may be interchangeably referred to as open, an open switch, in an open state, in an open position, etc., such that the switch electrically isolates separate nodes to which separate ends of the switch are connected through the switch. However, exemplary embodiments are not limited thereto: in some exemplary embodiments, a switch that is "on" may be interchangeably referred to as open, an open switch, in an open state, in an open position, etc., and a switch that is "off" may be interchangeably referred to as closed, a closed switch, in a closed state, in a closed position, etc.

[0075] exist Figure 6 In the second switching mode SM2, the first, fourth, fifth, eighth, ninth, twelfth, thirteenth and sixteenth switches SW1, SW4, SW5, SW8, SW9, SW12, SW13 and SW16 can be turned off based on the corresponding control signals C_CTRL1, C_CTRL4, C_CTRL5, C_CTRL8, C_CTRL9, C_CTRL12, C_CTRL13 and C_CTRL16 with a low level, and the second, third, sixth, seventh, tenth, eleventh, fourteenth and fifteenth switches SW2, SW3, SW6, SW7, SW10, SW11, SW14 and SW15 can be turned on based on the control signals C_CTRL2, C_CTRL3, C_CTRL6, C_CTRL7, C_CTRL10, C_CTRL11, C_CTRL14 and C_CTRL15 with a high level.

[0076] That is to say, reference Figure 5 and Figure 6, the first circuit structure 410 and the second circuit structure 420 have the same structure (e.g., the same or mirrored configuration of switches, nodes, and capacitors), and the switches included in the first circuit structure 410 and the second circuit structure 420 can perform complementary operations. For example, when the first switch SW1 is turned on, the second switch SW2 can be turned off.

[0077] refer to Figure 7 , in the first switching mode SM1, since the voltage of the node Vhigh is 20V and the voltage of the node Vlow is 5V, the voltage V1 of the first capacitor C1 may be 15V (e.g., three times the voltage level of the node Vlow). Since the voltage of the node Vlow is 5V, the voltage V5 of the fifth capacitor C5 may be 5V (e.g., the same voltage level as the voltage level of the node Vlow). Voltages (e.g., the magnitude of voltages) are interchangeably referred to herein as voltage levels.

[0078] refer to Figure 7-8 Due to the complementary operation of the first circuit structure 410 and the second circuit structure 420, in the second switching mode SM2 immediately before the first switching mode SM1, the voltage V2 of the second capacitor C2 may be 15V, and the voltage V6 of the sixth capacitor C6 may be 5V.

[0079] Therefore, reference Figures 7 and 8 In the first switching mode SM1 and the second switching mode SM2, the voltage V1 of the first capacitor C1 may be 15 V (e.g., three times the voltage level of the node Vlow), the voltage V2 of the second capacitor C2 may be 15 V (e.g., three times the voltage level of the node Vlow), the voltage V3 of the third capacitor C3 may be 10 V (e.g., twice the voltage level of the node Vlow), the voltage V4 of the fourth capacitor C4 may be 10 V (e.g., twice the voltage level of the node Vlow), the voltage V5 of the fifth capacitor C5 may be 5 V (e.g., the same voltage level as the voltage level of the node Vlow), and the voltage V6 of the sixth capacitor C6 may be 5 V (e.g., the same voltage level as the voltage level of the node Vlow).

[0080] Therefore, in Figure 7 In the first switching mode SM1, since the voltage V2 of the second capacitor C2 is 15V and the voltage of the node Vlow is 5V, the voltage V4 of the fourth capacitor C4 may be 10V. In addition, since the voltage V6 of the sixth capacitor C6 is 5V and the voltage of the node Vlow is 5V, the voltage V3 of the third capacitor C3 may be 10V.

[0081] refer to Figure 8In the second switching mode SM2, since the voltage of the node Vhigh is 20V and the voltage of the node Vlow is 5V, the voltage V2 of the second capacitor C2 may be 15V. Since the voltage of the node Vlow is 5V, the voltage V6 of the sixth capacitor C6 may be 5V.

[0082] refer to Figure 7 Due to complementary operations of the first circuit structure 410 and the second circuit structure 420, in the first switching mode SM1 immediately before the second switching mode SM2, the voltage V1 of the first capacitor C1 may be 15V, and the voltage V5 of the fifth capacitor C5 may be 5V.

[0083] Therefore, in Figure 8 In the second switching mode SM2, since the voltage V1 of the first capacitor C1 is 15V and the voltage of the node Vlow is 5V, the voltage V3 of the third capacitor C3 may be 10V. In addition, since the voltage V5 of the fifth capacitor C5 is 5V and the voltage of the node Vlow is 5V, the voltage V4 of the fourth capacitor C4 may be 10V.

[0084] exist Figure 7 and Figure 8 In the embodiment, although it is assumed that the battery 200 connected to the node Vlow is fully charged to a voltage of 5V, some example embodiments are not limited thereto. That is, in the case where the voltage of the battery 200 is lower than 5V, the first to sixth capacitors C1 to C6 having voltages V1 to V6 may be repeatedly charged and discharged. When the battery 200 is fully charged to a voltage of 5V, the voltages V1 to V6 of the first to sixth capacitors C1 to C6 may reach Figure 7 and Figure 8 The voltage levels shown.

[0085] Fig. 9 is a timing diagram of control signals during a 3:1 buck conversion operation according to some example embodiments, Fig.10 and Fig.11 are circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments, and Fig.12 and Fig.13 2 are equivalent circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments.

[0086] exist Figures 9 to 13 In the embodiment, the voltage of the node Vhigh can be reduced to 1 / 3, and the reduced voltage can be provided to the node Vlow. Figures 9 to 13 In the embodiment, the voltage of the node Vhigh may be 15V, and the voltage of the node Vlow may be 5V.

[0087] The switch controller 120 may generate a first phase control signal CTRL_P1, a second phase control signal CTRL_P2, and a third phase control signal CTRL_P3. The phase of the first phase control signal CTRL_P1 may be opposite to the phase of the second phase control signal CTRL_P2. The third phase control signal CTRL_P3 may maintain a high level during the step-down conversion operation.

[0088] During the 3:1 step-down conversion operation, the switch controller 120 may provide the first phase control signal CTRL_P1 as control signals C_CTRL1, C_CTRL6, C_CTRL7, C_CTRL9, C_CTRL11, C_CTRL14 and C_CTRL16, the switch controller 120 may provide the second phase control signal CTRL_P2 as control signals C_CTRL2, C_CTRL5, C_CTRL8, C_CTRL10, C_CTRL12, C_CTRL13 and C_CTRL15, and the switch controller 120 may provide the third phase control signal CTRL_P3 as control signals C_CTRL3 and C_CTRL4.

[0089] In the first switching mode SM1 (for example, based on the switching capacitor circuit 111, the switching controller 120, the bidirectional switching converter 110 or any combination thereof operating in the first switching mode SM1), the switching controller 120 can make the control signals C_CTRL1, C_CTRL6, C_CTRL7, C_CTRL9, C_CTRL11, C_CTRL14 and C_CTRL16 have a high level, the switching controller 120 can make the control signals C_CTRL2, C_CTRL5, C_CTRL8, C_CTRL10, C_CTRL12, C_CTRL13 and C_CTRL15 have a low level, and the switching controller 120 can make the control signals C_CTRL3 and C_CTRL4 have a high level.

[0090] In the second switching mode SM2 (for example, based on the switching capacitor circuit 111, the switching controller 120, the bidirectional switching converter 110 or any combination thereof operating in the second switching mode SM2), the switching controller 120 can make the control signals C_CTRL1, C_CTRL6, C_CTRL7, C_CTRL9, C_CTRL11, C_CTRL14 and C_CTRL16 have a low level, the switching controller 120 can make the control signals C_CTRL2, C_CTRL5, C_CTRL8, C_CTRL10, C_CTRL12, C_CTRL13 and C_CTRL15 have a high level, and the switching controller 120 can make the control signals C_CTRL3 and C_CTRL4 have a high level.

[0091] exist Fig.10 In the first switching mode SM1, the first, third, fourth, sixth, seventh, ninth, eleventh, fourteenth and sixteenth switches SW1, SW3, SW4, SW6, SW7, SW9, SW11, SW14 and SW16 can be turned on, and the second, fifth, eighth, tenth, twelfth, thirteenth and fifteenth switches SW2, SW5, SW8, SW10, SW12, SW13 and SW15 can be turned off.

[0092] exist Fig.11 In the second switching mode SM2, the first, sixth, seventh, ninth, eleventh, fourteenth and sixteenth switches SW1, SW6, SW7, SW9, SW11, SW14 and SW16 can be turned off, and the second, third, fourth, fifth, eighth, tenth, twelfth, thirteenth and fifteenth switches SW2, SW3, SW4, SW5, SW8, SW10, SW12, SW13 and SW15 can be turned on.

[0093] That is to say, reference Fig.10 and Fig.11 , the first circuit structure 410 and the second circuit structure 420 have the same structure (e.g., the same or mirrored configuration of switches, nodes, and capacitors), and the switches SW1 to SW16 included in the first circuit structure 410 and the second circuit structure 420, except for the third switch SW3 and the fourth switch SW4, can perform complementary operations. For example, when the first switch SW1 is turned on, the second switch SW2 can be turned off. The third switch SW3 and the fourth switch SW4 can all remain turned on.

[0094] refer to Fig.12 In the first switching mode SM1, since the voltage of the node Vhigh is 15V and the voltage of the node Vlow is 5V, the voltages V1 and V3 of the first and third capacitors C1 and C3 may be 10V. Since the voltage of the node Vlow is 5V, the voltage V6 of the sixth capacitor C6 may be 5V.

[0095] refer to Fig.13 Due to the complementary operation of the first circuit structure 410 and the second circuit structure 420, in the second switching mode SM2 immediately before the first switching mode SM1, the voltages V2 and V4 of the second capacitor C2 and the fourth capacitor C4 may be 10V, and the voltage V5 of the fifth capacitor C5 may be 5V.

[0096] Therefore, in Fig.12In the first switching mode SM1 , the voltages V2 and V4 of the second and fourth capacitors C2 and C4 may be 10V, and the voltage V5 of the fifth capacitor C5 may be 5V.

[0097] refer to Fig.13 In the second switching mode SM2, since the voltage of the node Vhigh is 15V and the voltage of the node Vlow is 5V, the voltages V2 and V4 of the second capacitor C2 and the fourth capacitor C4 may be 10V. Since the voltage of the node Vlow is 5V, the voltage V5 of the fifth capacitor C5 may be 5V.

[0098] refer to Fig.12 Due to the complementary operation of the first circuit structure 410 and the second circuit structure 420, in the first switching mode SM1 immediately before the second switching mode SM2, the voltages V1 and V3 of the first capacitor C1 and the third capacitor C3 may be 10V, and the voltage V6 of the sixth capacitor C6 may be 5V.

[0099] Therefore, in Fig.13 In the second switching mode SM2 , the voltages V1 and V3 of the first and third capacitors C1 and C3 may be 10V, and the voltage V6 of the sixth capacitor C6 may be 5V.

[0100] Therefore, reference Figure 12 to Figure 13 , in the first switching mode SM1 and the second switching mode SM2, the voltage V1 of the first capacitor C1 may be 10V (e.g., twice the voltage level of the node Vlow), the voltage V2 of the second capacitor C2 may be 10V (e.g., twice the voltage level of the node Vlow), the voltage V3 of the third capacitor C3 may be 10V (e.g., twice the voltage level of the node Vlow), the voltage V4 of the fourth capacitor C4 may be 10V (e.g., twice the voltage level of the node Vlow), the voltage V5 of the fifth capacitor C5 may be 5V (e.g., the same voltage level as the voltage level of the node Vlow), and the voltage V6 of the sixth capacitor C6 may be 5V (e.g., the same voltage level as the voltage level of the node Vlow).

[0101] exist Fig.12 and Fig.13 In the embodiment, although it is assumed that the battery 200 connected to the node Vlow is fully charged to a voltage of 5V, some example embodiments are not limited thereto. That is, in the case where the voltage of the battery 200 is lower than 5V, the first to sixth capacitors C1 to C6 having voltages V1 to V6 may be repeatedly charged and discharged. When the battery 200 is fully charged to a voltage of 5V, the voltages V1 to V6 of the first to sixth capacitors C1 to C6 may reach Fig.12 and Fig.13The voltage levels shown.

[0102] Fig.14 is a timing diagram of control signals during a 2:1 buck conversion operation according to some example embodiments, Fig.15 and Fig.16 are circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments, and Fig.17 and Fig.18 2 are equivalent circuit diagrams of a switched capacitor circuit in a first switching mode and a second switching mode, respectively, according to some example embodiments.

[0103] exist Figures 14 to 18 In , the voltage of the node Vhigh can be reduced to 1 / 2, and the reduced voltage can be provided to the node Vlow. Figures 14 to 18 In the example, the voltage of the node Vhigh may be 10V, and the voltage of the node Vlow may be 5V.

[0104] The switch controller 120 may generate a first phase control signal CTRL_P1, a second phase control signal CTRL_P2, and a third phase control signal CTRL_P3. The phase of the first phase control signal CTRL_P1 may be opposite to the phase of the second phase control signal CTRL_P2. The third phase control signal CTRL_P3 may maintain a high level during the step-down conversion operation.

[0105] During the 2:1 step-down conversion operation, the switch controller 120 may provide the first phase control signal CTRL_P1 as control signals C_CTRL1, C_CTRL2, C_CTRL9, C_CTRL11, C_CTRL13 and C_CTRL15, the switch controller 120 may provide the second phase control signal CTRL_P2 as control signals C_CTRL7, C_CTRL8, C_CTRL10, C_CTRL12, C_CTRL14 and C_CTRL16, and the switch controller 120 may provide the third phase control signal CTRL_P3 as control signals C_CTRL3, C_CTRL4, C_CTRL5 and C_CTRL6.

[0106] In the first switching mode SM1 (for example, based on the switching capacitor circuit 111, the switching controller 120, the bidirectional switching converter 110 or any combination thereof operating in the first switching mode SM1), the switching controller 120 can make the control signals C_CTRL1, C_CTRL2, C_CTRL9, C_CTRL11, C_CTRL13 and C_CTRL15 have a high level, the switching controller 120 can make the control signals C_CTRL7, C_CTRL8, C_CTRL10, C_CTRL12, C_CTRL14 and C_CTRL16 have a low level, and the switching controller 120 can make the control signals C_CTRL3, C_CTRL4, C_CTRL5 and C_CTRL6 have a high level.

[0107] In the second switching mode SM2 (for example, based on the switching capacitor circuit 111, the switching controller 120, the bidirectional switching converter 110 or any combination thereof operating in the second switching mode SM2), the switching controller 120 can make the control signals C_CTRL1, C_CTRL2, C_CTRL9, C_CTRL11, C_CTRL13 and C_CTRL15 have a low level, the switching controller 120 can make the control signals C_CTRL7, C_CTRL8, C_CTRL10, C_CTRL12, C_CTRL14 and C_CTRL16 have a high level, and the switching controller 120 can make the control signals C_CTRL3, C_CTRL4, C_CTRL5 and C_CTRL6 have a high level.

[0108] exist Fig.15 In the first switching mode SM1, the first, second, third, fourth, fifth, sixth, ninth, eleventh, thirteenth and fifteenth switches SW1, SW2, SW3, SW4, SW5, SW6, SW9, SW11, SW13 and SW15 can be turned on, and the seventh, eighth, tenth, twelfth, fourteenth and sixteenth switches SW7, SW8, SW10, SW12, SW14 and SW16 can be turned off.

[0109] exist Fig.16 In the second switching mode SM2, the first switch SW1, the second switch SW2, the ninth switch SW9, the eleventh switch SW11, the thirteenth switch SW13 and the fifteenth switch SW15 can be turned off, and the third switch SW3, the fourth switch SW4, the fifth switch SW5, the sixth switch SW6, the seventh switch SW4, the eighth switch SW5, the tenth switch SW6, the twelfth switch SW7, the fourteenth switch SW8, the twelfth switch SW10, the twelfth switch SW12, the fourteenth switch SW14 and the sixteenth switch SW16 can be turned on.

[0110] That is to say, reference Fig.15 and Fig.16 , the first circuit structure 410 and the second circuit structure 420 have the same structure (e.g., the same or mirrored configuration of switches, nodes, and capacitors), and the switches SW1 to SW16 included in the first circuit structure 410 and the second circuit structure 420, except for the third switch SW3, the fourth switch SW4, the fifth switch SW5, and the sixth switch SW6, can perform complementary operations. For example, when the first switch SW1 is turned on, the second switch SW2 can be turned off. The third switch SW3, the fourth switch SW4, the fifth switch SW5, and the sixth switch SW6 can all remain turned on.

[0111] refer to Fig.17 , in the first switching mode SM1, since the voltage of the node Vhigh is 10V and the voltage of the node Vlow is 5V, the voltages V1 to V6 of the first to sixth capacitors C1 to C6 may be 5V (eg, the same voltage level as the voltage level of the node Vlow).

[0112] refer to Fig.18 In the second switching mode SM2, since the voltage of the node Vlow is 5V, the voltages V1 to V6 of the first to sixth capacitors C1 to C6 may be 5V.

[0113] exist Fig.17 and Fig.18 In the embodiment, although it is assumed that the battery 200 connected to the node Vlow is fully charged to a voltage of 5V, some example embodiments are not limited thereto. That is, in the case where the voltage of the battery 200 is lower than 5V, the first to sixth capacitors C1 to C6 having voltages V1 to V6 may be repeatedly charged and discharged. When the battery 200 is fully charged to a voltage of 5V, the voltages V1 to V6 of the first to sixth capacitors C1 to C6 may reach Fig.17 and Fig.18 The voltage levels shown.

[0114] As described herein, any device, system, module, portion, unit, controller, circuit and / or portion thereof and / or any portion thereof (including but not limited to the electronic device 10, the charger IC 100, the bidirectional switching converter 110, the switch capacitor circuit 111, the switch controller 120, the battery 200, the first power interface 310, the second power interface 320, any portion thereof, etc.) according to any example embodiment may include one or more instances of a processing circuit, may be included in one or more instances of a processing circuit, and / or may be implemented by one or more instances of a processing circuit, such as hardware including a logic circuit; a hardware / software combination, such as a processor that executes software; or a combination thereof. For example, the processing circuit may more specifically include but not limited to a central processing unit (CPU), an arithmetic logic unit (ALU), a graphics processing unit (GPU), an application processor (AP), a digital signal processor (DSP), a microcomputer, a field programmable gate array (FPGA) and a programmable logic unit, a microprocessor, an application specific integrated circuit (ASIC), a neural network processing unit (NPU), an electronic control unit (ECU), an image signal processor (ISP), etc. In some example embodiments, the processing circuitry may include a computer-readable storage device (e.g., memory) storing an instruction program, such as a solid-state drive (SSD), such as a non-transitory computer-readable storage device, and the processing circuitry may also include a processor (e.g., a CPU) configured to execute the instruction program to implement the functions and / or methods performed by some or all of any device, system, module, portion, unit, controller, circuit, and / or portion thereof according to any example embodiment.

[0115] While the inventive concept has been particularly shown and described with reference to certain example embodiments thereof, it will be understood that various changes in form and details may be made therein without departing from the spirit and scope of the appended claims.

Claims

1. A switched capacitor circuit, comprising: a first switch having one end connected to the input node and the other end connected to the first node; a second switch, one end of which is connected to the input node and the other end of which is connected to the second node; a third switch, one end of which is connected to the first node and the other end of which is connected to a third node; a fourth switch, one end of which is connected to the second node, and the other end of which is connected to a fourth node; a fifth switch, one end of which is connected to the third node, and the other end of which is connected to the fifth node; a sixth switch, one end of which is connected to the fourth node, and the other end of which is connected to the sixth node; a seventh switch, one end of which is connected to the fifth node, and the other end of which is connected to the output node; an eighth switch, one end of which is connected to the sixth node, and the other end of which is connected to the output node; a ninth switch, one end of which is connected to the output node, and the other end of which is connected to the seventh node; a tenth switch, one end of which is connected to the seventh node, and the other end of which is connected to the first ground node; an eleventh switch, one end of which is connected to the output node, and the other end of which is connected to the ninth node; a twelfth switch, one end of which is connected to the ninth node, and the other end of which is connected to the second ground node; a thirteenth switch, one end of which is connected to the output node, and the other end of which is connected to the tenth node; a fourteenth switch, one end of which is connected to the tenth node, and the other end of which is connected to the third ground node; a fifteenth switch, one end of which is connected to the output node, and the other end of which is connected to the eighth node; a sixteenth switch, one end of which is connected to the eighth node, and the other end of which is connected to the fourth ground node; a first capacitor connected between the first node and the seventh node; a second capacitor connected between the second node and the eighth node; a third capacitor connected between the third node and the ninth node; a fourth capacitor connected between the fourth node and the tenth node; a fifth capacitor connected between the sixth node and the ninth node; as well as A sixth capacitor is connected between the fifth node and the tenth node.

2. The switched capacitor circuit according to claim 1, wherein: The switched capacitor circuit is configured to operate in a first switching mode based on a conversion operation based on a first voltage conversion ratio, turning on the first switch, the fourth switch, the fifth switch, the eighth switch, the ninth switch, the twelfth switch, the thirteenth switch, and the sixteenth switch, and The second switch, the third switch, the sixth switch, the seventh switch, the tenth switch, the eleventh switch, the fourteenth switch, and the fifteenth switch are turned off.

3. The switched capacitor circuit of claim 2, wherein: The switched capacitor circuit is configured to operate in a second switching mode based on the conversion operation based on the first voltage conversion ratio, turning off the first switch, the fourth switch, the fifth switch, the eighth switch, the ninth switch, the twelfth switch, the thirteenth switch, and the sixteenth switch, and The second switch, the third switch, the sixth switch, the seventh switch, the tenth switch, the eleventh switch, the fourteenth switch, and the fifteenth switch are turned on.

4. The switched capacitor circuit of claim 3 , wherein the switched capacitor circuit is configured based on operating in the first switching mode and the second switching mode, causing the first capacitor and the second capacitor to be charged to a voltage level three times the voltage level of the output node, causing the third capacitor and the fourth capacitor to be charged to a voltage level that is twice the voltage level of the output node, and The fifth capacitor and the sixth capacitor are charged to voltage levels that are the same voltage level as the voltage level of the output node.

5. The switched capacitor circuit of claim 1 , wherein the switched capacitor circuit is configured to: operate in a first switching mode in a conversion operation based on a second voltage conversion ratio, turning on the first switch, the third switch, the fourth switch, the sixth switch, the seventh switch, the ninth switch, the eleventh switch, the fourteenth switch, and the sixteenth switch, and The second switch, the fifth switch, the eighth switch, the tenth switch, the twelfth switch, the thirteenth switch, and the fifteenth switch are turned off.

6. The switched capacitor circuit of claim 5 , wherein the switched capacitor circuit is configured to: operate in a second switching mode based on the conversion operation based on the second voltage conversion ratio, turning off the first switch, the sixth switch, the seventh switch, the ninth switch, the eleventh switch, the fourteenth switch and the sixteenth switch, and The second switch, the third switch, the fourth switch, the fifth switch, the eighth switch, the tenth switch, the twelfth switch, the thirteenth switch, and the fifteenth switch are turned on.

7. The switched capacitor circuit of claim 6, wherein the switched capacitor circuit is configured based on operating in the first switching mode and the second switching mode, causing the first capacitor to the fourth capacitor to be charged to a voltage level twice the voltage level of the output node, and The fifth capacitor and the sixth capacitor are charged to voltage levels that are the same voltage level as the voltage level of the output node.

8. The switched capacitor circuit of claim 1 , wherein the switched capacitor circuit is configured to: operate in a first switching mode in a conversion operation based on a third voltage conversion ratio, turning on the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the ninth switch, the eleventh switch, the thirteenth switch, and the fifteenth switch, and The seventh switch, the eighth switch, the tenth switch, the twelfth switch, the fourteenth switch, and the sixteenth switch are turned off.

9. The switched capacitor circuit of claim 8, wherein the switched capacitor circuit is configured to: operate in a second switching mode based on the conversion operation based on the third voltage conversion ratio, turning off the first switch, the second switch, the ninth switch, the eleventh switch, the thirteenth switch, and the fifteenth switch, and The third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the tenth switch, the twelfth switch, the fourteenth switch, and the sixteenth switch are turned on.

10. The switched capacitor circuit of claim 9, wherein the switched capacitor circuit is configured based on operating in the first switching mode and the second switching mode, The fifth capacitor to the sixth capacitor are charged to a voltage level which is the same voltage level as the voltage level of the output node.

11. A bidirectional switching converter, comprising: A switched capacitor circuit, the switched capacitor circuit comprising: a first switch having one end connected to the first input / output node and the other end connected to the first node, a second switch having one end connected to the first input / output node and the other end connected to the second node, a third switch, one end of which is connected to the first node and the other end of which is connected to a third node, a fourth switch, one end of which is connected to the second node and the other end of which is connected to a fourth node, a fifth switch, one end of which is connected to the third node and the other end of which is connected to the fifth node, a sixth switch, one end of which is connected to the fourth node and the other end of which is connected to the sixth node, a seventh switch, one end of which is connected to the fifth node and the other end of which is connected to the second input / output node, an eighth switch, one end of which is connected to the sixth node and the other end of which is connected to the second input / output node, a ninth switch, one end of which is connected to the second input / output node and the other end of which is connected to the seventh node, a tenth switch, one end of which is connected to the seventh node, and the other end of which is connected to the first ground node, an eleventh switch, one end of which is connected to the second input / output node and the other end of which is connected to the ninth node, a twelfth switch, one end of which is connected to the ninth node, and the other end of which is connected to the second ground node, a thirteenth switch, one end of which is connected to the second input / output node and the other end of which is connected to the tenth node, a fourteenth switch, one end of which is connected to the tenth node, and the other end of which is connected to the third ground node, a fifteenth switch, one end of which is connected to the second input / output node and the other end of which is connected to the eighth node, a sixteenth switch, one end of which is connected to the eighth node, and the other end of which is connected to the fourth ground node, a first capacitor connected between the first node and the seventh node, a second capacitor connected between the second node and the eighth node, a third capacitor connected between the third node and the ninth node, a fourth capacitor connected between the fourth node and the tenth node, a fifth capacitor connected between the sixth node and the ninth node, and a sixth capacitor connected between the fifth node and the tenth node; and a switch controller configured to generate a first control signal, a second control signal, a third control signal, a fourth control signal, a fifth control signal, a sixth control signal, a seventh control signal, an eighth control signal, a ninth control signal, a tenth control signal, an eleventh control signal, a twelfth control signal, a thirteenth control signal, a fourteenth control signal, a fifteenth control signal and a sixteenth control signal to control the first switch, the second switch, the third switch, the fourth shape, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the eleventh switch, the twelfth switch, the thirteenth switch, the fourteenth switch, the fifteenth switch and the sixteenth switch, respectively.

12. The bidirectional switching converter according to claim 11, wherein the bidirectional switching converter is configured to perform a conversion operation based on a first voltage conversion ratio, the conversion operation comprising operating in a first switching mode such that the switch controller generates the first control signal, the fourth control signal, the fifth control signal, the eighth control signal, the ninth control signal, the twelfth control signal, the thirteenth control signal, and the sixteenth control signal to respectively turn on the first switch, the fourth switch, the fifth switch, the eighth switch, the ninth switch, the twelfth switch, the thirteenth switch, and the sixteenth switch, and The switch controller generates the second control signal, the third control signal, the sixth control signal, the seventh control signal, the tenth control signal, the eleventh control signal, the fourteenth control signal and the fifteenth control signal to respectively turn off the second switch, the third switch, the sixth switch, the seventh switch, the tenth switch, the eleventh switch, the fourteenth switch and the fifteenth switch.

13. The bidirectional switching converter of claim 12, wherein the switching operation comprises operating in a second switching mode such that the switch controller generates the first control signal, the fourth control signal, the fifth control signal, the eighth control signal, the ninth control signal, the twelfth control signal, the thirteenth control signal, and the sixteenth control signal to respectively turn off the first switch, the fourth switch, the fifth switch, the eighth switch, the ninth switch, the twelfth switch, the thirteenth switch, and the sixteenth switch, and The switch controller generates the second control signal, the third control signal, the sixth control signal, the seventh control signal, the tenth control signal, the eleventh control signal, the fourteenth control signal and the fifteenth control signal to respectively turn on the second switch, the third switch, the sixth switch, the seventh switch, the tenth switch, the eleventh switch, the fourteenth switch and the fifteenth switch.

14. The bidirectional switching converter of claim 13, wherein the bidirectional switching converter is configured to operate in the first switching mode and the second switching mode based on: causing the first capacitor and the second capacitor to be charged to a voltage level three times the voltage level of the second input / output node, causing the third capacitor and the fourth capacitor to be charged to a voltage level twice the voltage level of the second input / output node, and The fifth capacitor and the sixth capacitor are charged to voltage levels that are the same voltage level as the voltage level of the second input / output node.

15. The bidirectional switching converter of claim 11, wherein the bidirectional switching converter is configured to perform a conversion operation based on a second voltage conversion ratio, the conversion operation comprising operating in a first switching mode such that the switch controller generates the first control signal, the third control signal, the fourth control signal, the sixth control signal, the seventh control signal, the ninth control signal, the eleventh control signal, the fourteenth control signal, and the sixteenth control signal to respectively turn on the first switch, the third switch, the fourth switch, the sixth switch, the seventh switch, the ninth switch, the eleventh switch, the fourteenth switch, and the sixteenth switch, and The switch controller generates the second control signal, the fifth control signal, the eighth control signal, the tenth control signal, the twelfth control signal, the thirteenth control signal and the fifteenth control signal to respectively turn off the second switch, the fifth switch, the eighth switch, the tenth switch, the twelfth switch, the thirteenth switch and the fifteenth switch.

16. The bidirectional switching converter of claim 15, wherein the switching operation comprises operating in a second switching mode such that the switch controller generates the first control signal, the sixth control signal, the seventh control signal, the ninth control signal, the eleventh control signal, the fourteenth control signal, and the sixteenth control signal to respectively turn off the first switch, the sixth switch, the seventh switch, the ninth switch, the eleventh switch, the fourteenth switch, and the sixteenth switch, and The switch controller generates the second control signal, the third control signal, the fourth control signal, the fifth control signal, the eighth control signal, the tenth control signal, the twelfth control signal, the thirteenth control signal and the fifteenth control signal to respectively turn on the second switch, the third switch, the fourth switch, the fifth switch, the eighth switch, the tenth switch, the twelfth switch, the thirteenth switch and the fifteenth switch.

17. The bidirectional switching converter of claim 16, wherein the bidirectional switching converter is configured to operate in the first switching mode and the second switching mode based on causing the first capacitor to the fourth capacitor to be charged to a voltage level twice the voltage level of the second input / output node, and The fifth capacitor and the sixth capacitor are charged to voltage levels that are the same voltage level as the voltage level of the second input / output node.

18. The bidirectional switching converter of claim 11, wherein the bidirectional switching converter is configured to perform a conversion operation based on a third voltage conversion ratio, the conversion operation comprising operating in a first switching mode such that the switch controller generates the first control signal, the second control signal, the third control signal, the fourth control signal, the fifth control signal, the sixth control signal, the ninth control signal, the eleventh control signal, the thirteenth control signal, and the fifteenth control signal to respectively turn on the first switch, the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the ninth switch, the eleventh switch, the thirteenth switch, and the fifteenth switch, and The switch controller generates the seventh control signal, the eighth control signal, the tenth control signal, the twelfth control signal, the fourteenth control signal and the sixteenth control signal to respectively turn off the seventh switch, the eighth switch, the tenth switch, the twelfth switch, the fourteenth switch and the sixteenth switch.

19. The bidirectional switching converter of claim 18, wherein the switching operation comprises operating in a second switching mode such that the switch controller generates the first control signal, the second control signal, the ninth control signal, the eleventh control signal, the thirteenth control signal, and the fifteenth control signal to respectively turn off the first switch, the second switch, the ninth switch, the eleventh switch, the thirteenth switch, and the fifteenth switch, and The switch controller generates the third control signal, the fourth control signal, the fifth control signal, the sixth control signal, the seventh control signal, the eighth control signal, the tenth control signal, the twelfth control signal, the fourteenth control signal and the sixteenth control signal to respectively turn on the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the tenth switch, the twelfth switch, the fourteenth switch and the sixteenth switch.

20. The bidirectional switching converter of claim 19, wherein the bidirectional switching converter is configured based on operating in the first switching mode and the second switching mode, The first to sixth capacitors are charged to a voltage level that is the same voltage level as a voltage level of the second input / output node.

21. A switched capacitor circuit comprising: a first circuit structure having at least one switch and at least one capacitor including a first capacitor; as well as a second circuit structure having the same number of at least one switch, the same number of at least one capacitor, and the same connection structure as the first circuit structure, the at least one capacitor including a second capacitor, The first circuit structure and the second circuit structure are cross-coupled via the first capacitor and the second capacitor such that: When each switch in the first circuit structure and the second circuit structure is in opposite control states, at least one capacitor of the first circuit structure has the same voltage as at least one capacitor of the second circuit structure.

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