Power supply circuit and power supply

Abstract

This disclosure relates to a power supply circuit and a power supply, the power supply circuit comprising: a rectifier circuit, the input terminal of which is connected to an AC power source for converting AC power supplied by the AC power source into DC power; at least one capacitor connected to the output terminal of the rectifier circuit; and a switching circuit connected to the capacitor for controlling the connection state between the capacitor and the output terminal; wherein the connection state is a first connection state when the powered device is not being charged, and the connection state is a second connection state when the powered device is being charged, and the leakage power consumption of the capacitor in the first connection state is less than the leakage power consumption in the second connection state.

Description

Technical Field

[0001] This disclosure relates to the field of power supply technology, and in particular to a power supply circuit and a power supply. Background Technology

[0002] With the development of technology, more and more electronic devices have emerged. Different electronic devices may have different functions and uses. Electronic devices usually contain batteries, which can provide power to the electronic devices, thereby ensuring the normal operation of the electronic devices.

[0003] Because electronic devices have batteries, and batteries have limited capacity, they need to be charged when the battery level is low. Electronic devices usually come with a compatible charger, which can be used to charge the battery. Summary of the Invention

[0004] This disclosure provides an information processing method, apparatus, power supply, storage medium, and computer program product.

[0005] A first aspect of this disclosure provides a power supply circuit, comprising: a rectifier circuit, the input terminal of which is connected to an AC power source for converting AC power supplied by the AC power source into DC power; at least one capacitor connected to the output terminal of the rectifier circuit; and a switching circuit connected to the capacitor for controlling the connection state between the capacitor and the output terminal; wherein the connection state is a first connection state when the powered device is not being charged, and the connection state is a second connection state when the powered device is being charged, and the leakage power consumption of the capacitor in the first connection state is less than the leakage power consumption in the second connection state.

[0006] In one embodiment, the output terminal includes a positive terminal and a negative terminal; in the first connection state, the capacitor is connected between the positive terminal and the negative terminal, and the positive terminal is disconnected from at least a portion of the capacitor, or at least a portion of the capacitor is disconnected from the negative terminal; in the second connection state, the capacitor is connected between the positive terminal and the negative terminal, and the positive terminal, the capacitor, and the negative terminal form a circuit.

[0007] In one embodiment, the number of capacitors is multiple; the output terminal includes a positive terminal and a negative terminal; in the first connection state, at least some of the capacitors are connected in series between the positive terminal and the negative terminal; in the second connection state, multiple capacitors are connected in parallel between the positive terminal and the negative terminal.

[0008] In one embodiment, the output terminal includes a positive terminal and a negative terminal; the capacitor includes a first capacitor and a second capacitor; in the first connection state, the first capacitor and the second capacitor are connected in series between the positive terminal and the negative terminal; in the second connection state, the first capacitor and the second capacitor are connected in parallel between the positive terminal and the negative terminal.

[0009] In one embodiment, the switching circuit includes a double-pole double-throw (DPDT) switch circuit. The DPDT switch includes: a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal; one end of the first capacitor is connected to the positive terminal, and the other end of the first capacitor is connected to the first connection terminal; one end of the second capacitor is connected to the second connection terminal, and the other end of the second capacitor is connected to the negative terminal; the third connection terminal is connected to the negative terminal; the fourth, fifth, and sixth connection terminals are respectively connected to the positive terminal; in the first connection state, the first connection terminal is connected to the fourth connection terminal, and the sixth connection terminal is connected to the second connection terminal; in the second connection state, the first connection terminal is connected to the third connection terminal, and the second connection terminal is connected to the fifth connection terminal.

[0010] In one embodiment, the power supply circuit further includes a controller connected to the switching circuit, configured to control the switching state of the switching circuit based on whether the powered device is being charged, wherein different switching states correspond to different connection states.

[0011] In one embodiment, the controller is configured to output a first control signal controlling the switch state when charging the powered device, and to output a second control signal controlling the switch state when not charging the powered device; the switch circuit includes a controlled switch connected to the capacitor and the controller, configured to adjust the switch state according to the first control signal and the second control signal.

[0012] In one embodiment, the capacitor includes an electrolytic capacitor.

[0013] In one embodiment, in the first connection state, the power supply circuit is connected to the powered device, and the powered device is in an uncharged state; or, the power supply circuit is not connected to the powered device; in the second connection state, the power supply circuit is connected to the powered device, and the powered device is in a charging state.

[0014] A second aspect of this disclosure is to provide a power supply, including: the power supply circuit described in any of the above embodiments.

[0015] In one embodiment, the power source includes a charger.

[0016] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0017] The solution in this embodiment includes a rectifier circuit, a capacitor, and a switching circuit. The input terminal of the rectifier circuit is connected to an AC power supply, the capacitor is connected to the output terminal of the rectifier circuit, and the switching circuit is connected to the capacitor. The connection state between the capacitor and the output terminal is controlled by the switching circuit, so that the leakage power consumption of the capacitor in the first connection state is less than the leakage power consumption in the second connection state.

[0018] This reduces capacitor leakage power consumption when the device is not being charged (i.e., in standby mode), thereby lowering the power consumption of the power supply circuit and further reducing the overall power consumption of the power supply in standby mode. Simultaneously, it allows for normal charging of the device while it is being charged, without affecting the normal charging process.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0021] Figure 1 This is a schematic diagram of a power supply circuit according to an exemplary embodiment;

[0022] Figure 2 This is a schematic diagram of another power supply circuit according to an exemplary embodiment;

[0023] Figure 3 This is a block diagram illustrating a power supply according to an exemplary embodiment. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0025] A power supply comprises multiple different circuits, each with a different function. Each circuit can contain various electronic components, and the power consumption of each circuit will vary. The power consumption of the power supply can be attributed to the power consumption of each individual circuit; the higher the power consumption of each individual circuit, the higher the overall power consumption of the power supply.

[0026] refer to Figure 1 This is a schematic diagram of a power supply circuit, which includes:

[0027] Rectifier circuit 1, the input terminal of the rectifier circuit is connected to the AC power supply, and is used to convert the AC power supplied by the AC power supply into DC power.

[0028] At least one capacitor 2 is connected to the output terminal of the rectifier circuit.

[0029] Switching circuit 3, connected to the capacitor, is used to control the connection state between capacitor 2 and the output terminal of rectifier circuit 1.

[0030] The connection state is the first connection state when the device is not being charged, and the connection state is the second connection state when the device is being charged. The leakage power consumption of the capacitor in the first connection state is less than that in the second connection state.

[0031] The rectifier circuit 1 can be any type of rectifier circuit, and the circuit structure of the rectifier circuit 1 can be determined according to the power supply model, parameters, and specifications.

[0032] For example, rectifier circuit 1 includes, but is not limited to: bridge rectifier circuit, half-wave rectifier circuit, full-wave rectifier circuit, etc.

[0033] For example, rectifier circuit 1 can be a full-bridge rectifier circuit or a half-bridge rectifier circuit.

[0034] For example, rectifier circuit 1 is a single-phase rectifier circuit.

[0035] AC power sources can be AC ​​mains power, such as the power grid. Figure 1 In this diagram, L represents the live wire, N represents the neutral wire, and F1 represents the fuse.

[0036] The rectifier circuit 1 is used to convert AC power into DC power. The input terminal of the rectifier circuit 1 is connected to the AC power supply and can be used as the input terminal of the power supply circuit.

[0037] Capacitor 2 is connected to the output terminal of rectifier circuit 1. Since the voltage fluctuation is significant during rectification, adding a capacitor smooths the output voltage of rectifier circuit 1, reducing voltage fluctuations and ripple, thus acting as a filter. As a low-pass filter, capacitor 2 can filter out high-frequency voltages, thereby stabilizing the output voltage. The rectified DC power may contain high-frequency noise; capacitor 2 has short-circuit characteristics for high-frequency signals, effectively filtering out this noise and making the output DC power purer. Capacitor 2 also stores electrical energy; when the load increases, it can release the stored energy to meet instantaneous power demands, thereby maintaining the stability of the output voltage.

[0038] For example, Figure 1 In this context, VO represents the output terminal of rectifier circuit 1 after the capacitor is connected, which is used to power subsequent circuits.

[0039] In summary, capacitor 2 can provide a relatively stable input voltage when working normally, effectively reducing output ripple, improving power supply performance, and ensuring system stability.

[0040] For example, capacitor 2 may include a low-frequency bypass capacitor.

[0041] For example, capacitor 2 may include an electrolytic capacitor.

[0042] For example, the number of capacitors 2 is not limited and can be determined according to charging needs. For example, it can be one, two, three, etc.

[0043] Switching circuit 3 is connected to capacitor 2 and is used to adjust the connection state between capacitor 2 and the output terminal of rectifier circuit 1. The circuit structure of switching circuit 3 is not limited, as long as it can realize the function of adjusting the connection state between capacitor 2 and the output terminal of rectifier circuit 1.

[0044] For example, the connection state may include: the switching circuit 3 can be used to adjust the connection method of the output terminals of capacitor 2 and rectifier circuit 1, such as series, parallel, series-parallel connection, etc., and may also include the on and off connection states of the output terminals of capacitor 2 and rectifier circuit 1.

[0045] For example, the switching circuit 3 may include a switching circuit formed by a controlled switch, and may also include a knife switch, such as a single-pole single-throw switch and a multi-pole multi-throw switch. The controlled switch may include controlled switching elements such as transistors and metal-oxide-semiconductor field-effect transistors (MOS).

[0046] The structure of the switching circuit 3 can be determined based on the number of capacitors 2.

[0047] The connection state between capacitor 2 and the output terminal of rectifier circuit 1 when the powered device is not being charged is recorded as the first connection state, and the connection state between capacitor 2 and the output terminal of rectifier circuit 1 when the powered device is being charged is recorded as the second connection state. Switching circuit 3 can ensure that the leakage power consumption of capacitor in the first connection state is less than the leakage power consumption in the second connection state.

[0048] In the second state, the device can be charged normally. If the device is not being charged and is in standby mode, the connection between capacitor 2 and the output of rectifier circuit 1 can be adjusted to the first state via switch circuit 3. In the first state, the leakage power consumption of the capacitor is lower.

[0049] In one embodiment, in the first connection state, the power supply circuit is connected to the powered device, and the powered device is in an uncharged state. In this case, although the power supply circuit is connected to the powered device, it is not charging the powered device; that is, there is a direct or indirect circuit connection between the power supply circuit and the powered device, but no charging loop is formed. Therefore, the power supply circuit is essentially in a standby state and does not need to supply power to the powered device, meaning it is not charging the powered device.

[0050] In the first connection state, the power supply circuit is not connected to the powered device, and there is no direct or indirect circuit connection between the power supply circuit and the powered device. For example, if the power source of the power supply circuit has a charging interface, but the powered device is not connected to the charging interface of the power source of the power supply circuit, then the power supply circuit cannot charge the powered device.

[0051] In the second connection state, the power supply circuit is connected to the powered device, and the powered device is in a charging state. The power supply circuit can be directly or indirectly connected to the powered device to form a charging circuit to charge the powered device.

[0052] Since capacitor 2 is connected to the output terminal of rectifier circuit 1, capacitor 2 will have leakage current, which will result in leakage power consumption, thereby increasing the power consumption of the power supply.

[0053] This solution reduces capacitor leakage power consumption when the device is not being charged (i.e., in standby mode), thereby lowering the overall power consumption of the power supply circuit in standby mode and further reducing the overall power consumption of the power supply. Simultaneously, it does not affect the normal charging of the device while it is being charged.

[0054] In one embodiment, the power supply circuit can be applied to a power supply, including but not limited to: power supplies for various electronic devices, such as chargers.

[0055] In one embodiment, reference Figure 1 The output terminal of rectifier circuit 1 includes a positive terminal and a negative terminal, such as... Figure 1As shown by the "+" in the diagram, the negative electrode is as follows: Figure 1 The "-" in the text is shown.

[0056] In the first connection state, capacitor 2 is connected between the positive and negative terminals, and the positive terminal is disconnected from at least part of capacitor 2, or at least part of capacitor 2 is disconnected from the negative terminal.

[0057] In the second connection state, capacitor 2 is connected between the positive and negative terminals, and the positive terminal, capacitor 2 and the negative terminal form a circuit.

[0058] This embodiment is an example of adjusting whether capacitor 2 is connected to the circuit and whether it is connected to the positive and / or negative terminal of the output of rectifier circuit 1. The first connection state and the second connection state of capacitor 2 are adjusted in this way.

[0059] Capacitor 2 is connected between the positive and negative terminals of the output of rectifier circuit 1. There can be one or more capacitors 2. One end of capacitor 2 can be connected to the positive terminal and the other end to the negative terminal.

[0060] If there is only one capacitor 2, then in the first state, the capacitor 2 is disconnected from the positive and / or negative terminal of the output of the rectifier circuit 1. In the second state, the capacitor 2 is connected to both the positive and negative terminals of the output of the rectifier circuit 1.

[0061] In this situation, since the power supply does not charge the device in the first state, disconnecting capacitor 2 from the positive and / or negative terminals of the rectifier circuit 1 can reduce the leakage current generated in capacitor 2, or even prevent current from flowing through capacitor 2. This reduces the leakage power consumption of capacitor 2, thereby helping to reduce the overall power consumption of the power supply.

[0062] If there are multiple capacitors 2, in the first state, since the power supply circuit does not need to charge the powered device, at least a portion of the capacitors 2 are disconnected from the positive terminal by the switching circuit 3, and / or at least a portion of the capacitors 2 are disconnected from the negative terminal. The positive terminal of the output of the rectifier circuit 1, the capacitors 2 and the negative terminal of the output of the rectifier circuit 1 will not form a circuit, so that at least a portion of the capacitors 2 are not connected to the circuit.

[0063] In this situation, at least a portion of capacitor 2 will not have current flowing through it, thereby reducing leakage current in capacitor 2 and thus reducing leakage power consumption, which in turn reduces the overall power consumption of the power supply.

[0064] For example, the portion of capacitors here can be any portion, and the first percentage of the number of capacitors in this portion to the total number of capacitors is not limited. The first percentage is positively correlated with the reduction in the total leakage power consumption of the capacitors. The higher the first percentage, the better the effect of reducing the leakage power consumption of the capacitors in the first state.

[0065] For example, in the first state, all capacitors 2 are disconnected from the positive terminal of the output of rectifier circuit 1, or all capacitors 2 are disconnected from the negative terminal of the output of rectifier circuit 1.

[0066] Since each capacitor is disconnected from the positive and / or negative terminals of the rectifier circuit 1, none of the capacitors are connected to the circuit, no current flows through each capacitor, and no leakage current is generated in each capacitor. This further reduces the total leakage power consumption of capacitor 2, thereby reducing the power consumption of the power supply even further in the first connection state.

[0067] In the second connection state, capacitor 2 is connected between the positive and negative terminals. The positive terminal of the output terminal of rectifier circuit 1, capacitor 2 and the negative terminal of the output terminal of rectifier circuit 1 form a circuit, thereby playing the functions of filtering and voltage regulation, so that the power supply circuit can supply power to the powered equipment normally.

[0068] In one embodiment, the number of capacitors is multiple. The output terminal of rectifier circuit 1 includes a positive terminal and a negative terminal.

[0069] In the first connection state, at least part of the capacitor is connected in series between the positive and negative terminals.

[0070] In the second connection state, multiple capacitors are connected in parallel between the positive and negative terminals.

[0071] This embodiment is another example of adjusting the connection state. By using different connection methods in the first and second connection states, that is, by having different connection methods between the capacitors in the first and second connection states, the leakage power consumption of the capacitor can be adjusted.

[0072] In the second state, the capacitors 2 are connected in parallel, meaning each capacitor's two ends are connected to the positive and negative terminals of the rectifier circuit 1's output, respectively. In this state, the capacitors 2 function effectively, allowing the power supply circuit to charge the device normally. Therefore, the second state is the connection state that enables normal charging of the device.

[0073] Capacitor 2 is connected in parallel between the positive and negative terminals of the output of rectifier circuit 1. Therefore, the voltage across each capacitor is the same, and each capacitor carries a current. Assuming the output voltage of rectifier circuit 1 is U, and the leakage current of the capacitor is I, the leakage current I can be determined based on the voltage U across the capacitor, the leakage coefficient k, and the capacitance C. The leakage coefficient k is related to the capacitor's material and temperature.

[0074] For example, the formula for determining leakage current can be as follows:

[0075] I = k * C * U.

[0076] The unit of leakage current can be milliampere, microampere, etc., the unit of capacitance can be millifarad, microfarad, or picofarad, etc., and the unit of voltage can be volt.

[0077] The leakage current of each capacitor is U*I. If N capacitors are connected in parallel, the total leakage current of each capacitor is N*I. The larger the leakage current, the greater the leakage current of the capacitor, which results in a large power consumption even when the power supply is not charging the device.

[0078] In the first state, since the power supply circuit does not need to charge the powered device, adjusting the capacitor connection will not have a significant impact on the power supply circuit.

[0079] This method allows at least a portion of the capacitors to be connected in series in the first connected state, where the power supply circuit is not charging the powered device. Because the voltage across the series-connected capacitors decreases, the leakage current flowing through them is reduced.

[0080] For example, if there are two capacitors in total, they are connected in series at the positive and negative terminals of the output of rectifier circuit 1. The voltage across each capacitor is U / 2. According to the formula for determining leakage current, the leakage current flowing through the capacitor is I / 2. Compared to the scheme where all capacitors are connected in parallel at the positive and negative terminals of the output of rectifier circuit 1, this method reduces the leakage current of each capacitor by half, the capacitance across the capacitors by half, and the leakage power consumption of the capacitors by three-quarters, reducing it to one-quarter of that in the parallel connection method. That is, the leakage power consumption of each capacitor is (U*I) / 4. Obviously, this effectively reduces the leakage power consumption of each capacitor.

[0081] By reducing the leakage power consumption of each capacitor, the overall leakage power consumption of each capacitor can be reduced, thereby reducing the power consumption of the power supply.

[0082] For example, the number of capacitors connected in series represents the second largest proportion of the total number of capacitors. This second proportion can be determined according to requirements, and it is positively correlated with the reduction in total leakage power consumption of the capacitors. The larger this second proportion is, the greater the reduction in total leakage power consumption of the capacitors, and the better the effect of reducing leakage power consumption.

[0083] In one embodiment, reference Figure 1 The output terminals include positive and negative terminals. Capacitor 2 includes: a first capacitor EC1 and a second capacitor EC2. Both the first capacitor EC1 and the second capacitor EC2 are electrolytic capacitors.

[0084] In the first connection state, the first capacitor EC1 and the second capacitor EC2 are connected in series between the positive and negative terminals; in the second connection state, the first capacitor EC1 and the second capacitor EC2 are connected in parallel between the positive and negative terminals.

[0085] Figure 1 The first connection state is shown. The switch circuit 3 includes a double-pole double-throw switch circuit. The double-pole double-throw switch includes: a first connection terminal A1, a second connection terminal A2, a third connection terminal C1, a fourth connection terminal B1, a fifth connection terminal C2, and a sixth connection terminal B2, for a total of six connection terminals.

[0086] One end of the first capacitor EC1 is connected to the positive terminal, and the other end of the first capacitor EC1 is connected to the first connection terminal A1. For example, the positive terminal of the first capacitor EC1 is connected to the positive terminal of the output terminal of the rectifier circuit 1, and the negative terminal of the first capacitor EC1 is connected to the first connection terminal A1.

[0087] One end of the second capacitor EC2 is connected to the second connection terminal A2, and the other end of the second capacitor EC2 is connected to the negative terminal of the output terminal of the rectifier circuit 1.

[0088] For example, the positive terminal of the second capacitor EC2 is connected to the second connection terminal A2, and the negative terminal of the second capacitor EC2 is connected to the negative terminal of the output terminal of the rectifier circuit 1.

[0089] The third connection terminal C1 is connected to the negative terminal of the output of rectifier circuit 1.

[0090] The fourth connection terminal B1, the fifth connection terminal C2, and the sixth connection terminal B2 are respectively connected to the positive terminal of the output terminal of the rectifier circuit 1.

[0091] In the first connection state, the first connection terminal A1 is connected to the fourth connection terminal B1, and the sixth connection terminal B2 is connected to the second connection terminal A2. In the second connection state, the first connection terminal A1 is connected to the third connection terminal C1, and the second connection terminal A2 is connected to the fifth connection terminal C2.

[0092] In this embodiment, the switching circuit 3 is a double-pole double-throw switch circuit. By adjusting the switching state of the switching circuit 3, different switching states correspond to different connection states of capacitor 2. In the first connection state, the first capacitor EC1 and the second capacitor EC2 are connected in series, and in the second connection state, the first capacitor EC1 and the second capacitor EC2 are connected in parallel. In this way, the leakage current of the first capacitor EC1 and the second capacitor EC2 can be reduced in the first connection state, thereby reducing the leakage power consumption of the first capacitor EC1 and the second capacitor EC2, which helps to reduce the overall power consumption of the power supply in the first state.

[0093] This example illustrates the case where capacitor 2 includes two capacitors. Capacitor 2 can also include one or more capacitors, such as three or more. In summary, in the first connection state, the number of capacitors connected in series is greater than the number of capacitors connected in series in the second connection state. This ensures that the total leakage current of all capacitors in the first connection state is less than the total leakage current of all capacitors in the second connection state, thereby ensuring that the total leakage power consumption of all capacitors in the first connection state is less than the total leakage power consumption of all capacitors in the second connection state.

[0094] In one embodiment, in the first connection state, the first capacitor EC1 and / or the second capacitor EC2 are disconnected from the positive and / or negative terminals. In the second connection state, the first capacitor EC1 and the second capacitor EC2 are connected between the positive and negative terminals, forming a circuit.

[0095] For example, in the first connection state, the first capacitor EC1 is disconnected from the positive terminal of the output of the rectifier circuit 1.

[0096] For example, in the first connection state, the first capacitor EC1 is disconnected from the negative terminal of the output of the rectifier circuit 1.

[0097] For example, in the first connection state, the first capacitor EC1 is disconnected from both the negative and positive terminals of the output terminal of the rectifier circuit 1.

[0098] For example, in the first connection state, the second capacitor EC2 is disconnected from the positive terminal of the output of the rectifier circuit 1.

[0099] For example, in the first connection state, the second capacitor EC2 is disconnected from the negative terminal of the output of the rectifier circuit 1.

[0100] For example, in the first connection state, the second capacitor EC2 is disconnected from both the negative and positive terminals of the output terminal of the rectifier circuit 1.

[0101] In the first connection state, since the first capacitor EC1 and / or the second capacitor EC2 do not form a circuit with the negative and positive terminals of the output terminal of the rectifier circuit 1, no current flows through the first capacitor EC1 and / or the second capacitor EC2, so there is no leakage current. This reduces the leakage current of the first capacitor EC1 and / or the second capacitor EC2, thereby reducing the leakage power consumption of the first capacitor EC1 and / or the second capacitor EC2, which helps to reduce the power consumption of the power supply.

[0102] In the second connection state, the first capacitor EC1 and the second capacitor EC2 are connected between their positive and negative terminals, forming a circuit. That is, the positive terminal of the first capacitor EC1 is connected to the positive terminal of the output of rectifier circuit 1, and the negative terminal of the first capacitor EC1 is connected to the negative terminal of the output of rectifier circuit 1. The positive terminal of the second capacitor EC2 is connected to the positive terminal of the output of rectifier circuit 1, and the negative terminal of the second capacitor EC2 is connected to the negative terminal of the output of rectifier circuit 1.

[0103] In one embodiment, reference Figure 2 This is a schematic diagram of another power supply circuit, which also includes:

[0104] The controller 4 is connected to the switch circuit 3 and is used to control the switching state of the switch circuit 3 according to whether the powered device is being charged. Different switching states correspond to different connection states.

[0105] Controller 4 can be any controller with switching control function, including but not limited to: Central Processing Unit (CPU) and Microcontroller Unit (MCU).

[0106] When the power supply circuit is charging the device, the controller 4 can control the switching state of the switch circuit 3 to a first switching state, which corresponds to a first connection state. When the power supply circuit is not charging the device, the controller can control the switching state of the switch circuit 3 to a second switching state, which corresponds to a second connection state.

[0107] For example, controller 4 is configured to output a first control signal controlling the switch state when charging the powered device, and a second control signal controlling the switch state when not charging the powered device. The controller can detect or identify whether the powered device is being charged. For example, it can detect whether a power supply circuit is connected to the powered device and forms a charging loop. If a charging loop is formed, it determines that the powered device is being charged; otherwise, it determines that the powered device is not being charged.

[0108] For example, the first control signal is used to control the switching state of the switching circuit 3 to a first switching state, and the connection state corresponding to the first switching state is a first connection state. The second control signal is used to control the switching state of the switching circuit 3 to a second switching state, and the connection state corresponding to the second switching state is a second connection state.

[0109] For example, the switching circuit 3 includes:

[0110] A controlled switch, connected to capacitor 2 and controller 4, is used to adjust the switch state according to a first control signal and a second control signal.

[0111] When the switching circuit 3 is a switching circuit formed by a controlled switch, the controlled switch needs to be connected to the controller 4. The control signal output by the controller is used to control the switching state of the controlled switch, thereby adjusting the switching state of the switching circuit 3.

[0112] For example, the switching circuit 3 includes multiple controlled switches, and the switching states of each controlled switch together determine the switching state of the switching circuit 3.

[0113] For example, refer to Figure 2 The power supply circuit may also include:

[0114] Optocoupler 5 has its input end connected to controller 4 and its output end connected to switching circuit 3. It is used to adjust the switching state of switching circuit 3 according to the control signal output by controller, thereby adjusting the connection state of capacitor 2.

[0115] In one embodiment, a power supply is also provided, the power supply comprising:

[0116] The charging circuit in any of the above embodiments.

[0117] The solution in this embodiment can be applied to power supplies, which may include power supplies for mobile devices and fixed devices. Mobile devices may include mobile phones, tablets, in-vehicle central control devices, wearable devices, smart devices, and aircraft, etc. Smart devices may include smart office equipment, smart home equipment, and robots, etc.

[0118] For example, the power source includes a charger, which may also be called a power adapter, for charging the terminal device.

[0119] In one embodiment, in a power supply, leakage current of high-voltage devices on the high-voltage bus after the rectifier bridge is one of the factors affecting the standby power consumption of the power supply. Among these factors, electrolytic capacitors are one type of component, and leakage current of electrolytic capacitors affects the standby power consumption of the power supply.

[0120] The switching circuit in this example includes a double-pole double-throw switch.

[0121] like Figure 1 and Figure 2 In the relevant scheme, based on the two electrolytic capacitors connected in parallel between the bus voltage and hot ground after the rectifier bridge, a double-pole double-throw switch S1 is added. It is assumed that the parameters of the two electrolytic capacitors are exactly the same.

[0122] When the power supply is connected to the device, it charges the device; when the power supply is not connected, it does not charge the device. In standby mode, when the power supply is not connected to the device, the first terminal A1 of switch S1 in the switching circuit is connected to the fourth terminal B1, and the second terminal A2 is connected to the sixth terminal B2. At this time, the first electrolytic capacitor EC1 and the second electrolytic capacitor EC2 form a series connection between the bus voltage and the thermal ground, i.e., between the positive and negative terminals of the rectifier circuit output.

[0123] When the power supply is normally supplying power to the powered equipment, switch S1 is controlled by the controller. The first connection terminal A1 in switch S1 is connected to the third connection terminal C1, and the second connection terminal A2 is connected to the fifth connection terminal C2. At this time, the first electrolytic capacitor EC1 and the second electrolytic capacitor EC2 form a parallel connection and are both applied between the bus voltage and the hot ground, that is, between the positive and negative terminals of the output terminal of the rectifier circuit.

[0124] The formula for calculating the leakage current of an electrolytic capacitor is as follows: I = k * C * U.

[0125] I is the leakage current in microamps; k is the leakage coefficient, which is related to the electrolytic capacitor material and temperature; C is the capacitance of the electrolytic capacitor in μF; U is the voltage applied across the capacitor in V.

[0126] Normally, two electrolytic capacitors are connected in parallel, and the voltage across each capacitor is the bus voltage U. The leakage current generated by the electrolytic capacitor in the circuit is 2I, where I is the leakage current generated by a single electrolytic capacitor when applied to the bus voltage and the hot ground.

[0127] Two electrolytic capacitors are connected in series. The voltage across each capacitor is half of the bus voltage, U / 2. The leakage current generated by the electrolytic capacitors in the circuit is I / 2.

[0128] Therefore, under the same conditions, this solution will effectively reduce the standby leakage current of the electrolytic capacitor to one-quarter of that of related solutions, and reduce the power consumption caused by the leakage current of the electrolytic capacitor by three-quarters.

[0129] When the charger is in standby mode with no device connected to the output port, the protocol IC is in sleep mode. At this time, the control circuit does not operate, the double-pole double-throw switch S1 is switched to "B1" and "B2" respectively, and the large electrolytic capacitors EC1 and EC2 are connected in series between the bus and hot ground, resulting in minimal leakage current. The charger can be a charger that supports the Power Delivery charging protocol, i.e., a PD charger, or a PD adapter.

[0130] When the PD adapter output port is plugged into the device, charging begins. The protocol IC sends a high-level signal through the I / O pin, triggering the optocoupler to control the primary drive signal. The primary drive signal (weak current controlling strong current) turns on the double-pole double-throw switch, which switches to "C1" and "C2". At this time, the first electrolytic capacitor EC1 and the second electrolytic capacitor EC2 are connected in parallel and applied between the bus voltage and the hot ground. This provides a relatively stable input voltage during normal operation, effectively reducing output ripple, improving power supply performance, and ensuring system stability.

[0131] It should be noted that the terms "first" and "second" in the embodiments of this disclosure are for ease of description and distinction only, and have no other specific meaning.

[0132] Figure 3 This is a block diagram illustrating a power supply according to an exemplary embodiment. For example, the power supply may be for charging devices such as mobile phones, computers, digital broadcasting terminals, messaging devices, game consoles, tablets, medical devices, fitness equipment, and personal digital assistants.

[0133] Reference Figure 3 The power supply may include one or more of the following components: processing component 902, memory 904, power component 906, multimedia component 908, audio component 910, input / output (I / O) interface 912, sensor component 914, and communication component 916.

[0134] Processing component 902 typically controls the overall operation of the power supply, such as operations associated with display, data communication, and recording. Furthermore, processing component 902 may include one or more modules to facilitate interaction between processing component 902 and other components.

[0135] Memory 904 is configured to store various types of data to support operation on power. Examples of this data include instructions for any application or method operating on power. Memory 904 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 storage, and flash memory.

[0136] Power component 906 provides power to various components of the power source. Power component 906 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the power source.

[0137] Multimedia component 908 includes a screen that provides an output interface between a power source and a 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 can be implemented as a touchscreen to receive input signals from the user. The Touch Panel includes one or more touch sensors to sense touches, swipes, and gestures on the Touch Panel. The touch sensors can sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation.

[0138] Audio component 910 is configured to output and / or input audio signals. For example, audio component 910 includes a microphone (MIC) configured to receive external audio signals when the power supply is in operation mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 904 or transmitted via communication component 916. In some embodiments, audio component 910 also includes a speaker for outputting audio signals.

[0139] I / O interface 912 provides an interface between processing component 902 and peripheral interface modules, such as keyboards, click wheels, buttons, etc.

[0140] Sensor assembly 914 includes one or more sensors for providing a state assessment of various aspects of the power supply. Sensor assembly 914 may also detect changes in the position of the power supply or a component of the power supply, the presence or absence of user contact with the power supply, the orientation or acceleration / deceleration of the power supply, and temperature changes of the power supply. Sensor assembly 914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. In some embodiments, sensor assembly 914 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0141] Communication component 916 is configured to facilitate wired or wireless communication between the power supply and other devices. The power supply can access wireless networks based on communication standards, such as Wi-Fi, 4G, or 5G, or combinations thereof. In one exemplary embodiment, communication component 916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 916 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wide Band (UWB), Bluetooth (BT), and other technologies.

[0142] In an exemplary embodiment, the power supply 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.

[0143] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the claims.

[0144] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A power supply circuit, characterized in that, The power supply circuit includes: A rectifier circuit, the input terminal of which is connected to an AC power source, is used to convert the AC power supplied by the AC power source into DC power. At least one capacitor is connected to the output terminal of the rectifier circuit; A switching circuit, connected to the capacitor, is used to control the connection state between the capacitor and the output terminal; Wherein, the connection state when the powered device is not being charged is the first connection state, and the connection state when the powered device is being charged is the second connection state, and the leakage power consumption of the capacitor in the first connection state is less than the leakage power consumption in the second connection state.

2. The circuit according to claim 1, characterized in that, The output terminal includes a positive terminal and a negative terminal; In the first connection state, the capacitor is connected between the positive terminal and the negative terminal, the positive terminal is disconnected from at least a portion of the capacitor, and / or, at least a portion of the capacitor is disconnected from the negative terminal; In the second connection state, the capacitor is connected between the positive terminal and the negative terminal, and the positive terminal, the capacitor, and the negative terminal form a circuit.

3. The circuit according to claim 1, characterized in that, The number of capacitors is multiple; the output terminal includes a positive terminal and a negative terminal; In the first connection state, at least a portion of the capacitor is connected in series between the positive terminal and the negative terminal; In the second connection state, multiple capacitors are connected in parallel between the positive terminal and the negative terminal.

4. The circuit according to claim 1, characterized in that, The output terminal includes a positive terminal and a negative terminal; the capacitor includes: a first capacitor and a second capacitor; In the first connection state, the first capacitor and the second capacitor are connected in series between the positive terminal and the negative terminal; in the second connection state, the first capacitor and the second capacitor are connected in parallel between the positive terminal and the negative terminal.

5. The circuit according to claim 4, characterized in that, The switching circuit includes a double-pole double-throw switch circuit, and the double-pole double-throw switch includes: a first connection terminal, a second connection terminal, a third connection terminal, a fourth connection terminal, a fifth connection terminal, and a sixth connection terminal; One end of the first capacitor is connected to the positive terminal, and the other end of the first capacitor is connected to the first connection terminal; One end of the second capacitor is connected to the second connection terminal, and the other end of the second capacitor is connected to the negative terminal; The third connection terminal is connected to the negative electrode; The fourth, fifth, and sixth connecting terminals are respectively connected to the positive electrode; In the first connection state, the first connection terminal is connected to the fourth connection terminal, and the sixth connection terminal is connected to the second connection terminal; In the second connection state, the first connection terminal is connected to the third connection terminal, and the second connection terminal is connected to the fifth connection terminal.

6. The circuit according to claim 1, characterized in that, The power supply circuit also includes: A controller, connected to the switching circuit, is used to control the switching state of the switching circuit according to whether the powered device is being charged, wherein different switching states correspond to different connection states.

7. The circuit according to claim 6, characterized in that, The controller is configured to output a first control signal to control the switch state when charging the powered device, and to output a second control signal to control the switch state when not charging the powered device; The switching circuit includes: A controlled switch, connected to the capacitor and the controller, is used to adjust the switch state according to the first control signal and the second control signal.

8. The circuit according to claim 1, characterized in that, The capacitors include electrolytic capacitors.

9. The circuit according to claim 1, characterized in that, In the first connection state, the power supply circuit is connected to the powered device, and the powered device is in an uncharged state; or, the power supply circuit is not connected to the powered device. In the second connection state, the power supply circuit is connected to the powered device, and the powered device is in a charging state.

10. A power supply, characterized in that, include: The power supply circuit according to any one of claims 1 to 9.

11. The power supply according to claim 10, characterized in that, The power source includes a charger.

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