Power-saving supply management and control circuit conforming to power supply regulation

Abstract

The invention discloses a power-saving supply management and control circuit according with power supply regulation. The power-saving supply management and control circuit comprises a first switch assembly, a second switch assembly and a control circuit. The first end of the first switch assembly and the first end of the capacitor are connected with the first end of the power supply device. The second end of the first switch assembly and the second end of the second switch assembly are connected with the second end of the power supply device. The first end of the second switch assembly is connected with the second end of the capacitor. When the first end of the power supply device supplies current, the control circuit controls the first switch assembly and the second switch assembly to operate, so that the current flowing back to the second end of the power supply device is not less than the specified current.

Description

Technical Field

[0001] The invention relates to a power supply control circuit, and in particular to a power-saving supply control circuit that meets power supply regulations. Background Art

[0002] In recent years, with the development of technology, the functions of electronic devices have been increasing, and the power consumption has increased significantly. Therefore, the power supply device supplies power to the power converter, and then the power converter converts the power and supplies it to the electronic device. The power supply efficiency needs to be further improved.

[0003] When the power supply device supplies power to the power converter, the system will detect whether the return power supply device current is greater than the current threshold, and judge whether the power supply device is connected to the power converter. If the system detects that the return power supply device current is less than the current threshold for more than a specified time, it will be regarded as the power converter has been removed. At this time, the power supply device will be required to stop supplying current, resulting in the power converter being unable to continuously supply power to the electronic device, resulting in reduced operating efficiency of the electronic device.

[0004] In order for the power supply device to maintain power supply to the power converter, when the current flowing back to the power converter is less than the current threshold, additional current must be drawn within a specified time to meet the specifications of the power supply device. However, in order to avoid being affected by the environment, the additional current drawn time often exceeds the specified time, thereby causing additional power consumption losses. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a power-saving supply control circuit that meets the power supply regulations in view of the shortcomings of the prior art. The power-saving supply control circuit includes a first switch component, a capacitor, a second switch component and a control circuit. The first end of the first switch component is connected to the first end of the power supply device. The second end of the first switch component is connected to the second end of the power supply device. The first end of the capacitor is connected to the first end of the power supply device and the first end of the load. The second end of the capacitor is connected to the second end of the load. The first end of the second switch component is connected to the second end of the capacitor. The second end of the second switch component is connected to the second end of the power supply device. The control circuit connects the control end of the first switch component and the control end of the second switch component. When the first end of the power supply device supplies current, the control circuit controls the first switch component and the second switch component to operate so that the sum of the current flowing through the first switch component to the second end of the power supply device and the current flowing through the capacitor, the load and the second switch component to the second end of the power supply device is not less than a current threshold required by a power protocol within a specified time.

[0006] As described above, the present invention provides a power saving supply control circuit that complies with the power supply regulation. The power saving supply control circuit of the present invention can make the current flowing back to the power supply device meet a current threshold required by the power specification after the power supply device supplies current, so as to prevent the power supply device from being determined to be not connected to the load and being required to stop supplying current, resulting in the operation of the load, such as the power supply efficiency of the power converter supplying power to the electronic device being affected, and can optimize the opening time of the first switch component to save unnecessary power supply of the power supply device, thereby effectively reducing the power consumption of the power supply device.

[0007] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 FIG. 1 is a circuit diagram of a power-saving supply control circuit that meets power supply requirements according to a first embodiment of the present invention.

[0009] Figure 2 FIG. 1 is a circuit diagram of a power-saving supply control circuit that meets the power supply requirement according to a second embodiment of the present invention.

[0010] Figure 3 FIG. 1 is a circuit diagram of a power-saving supply control circuit that meets the power supply specification according to a third embodiment of the present invention.

[0011] Figure 4 The power-saving supply control circuit according to the first to third embodiments of the present invention is used to control the current supplied by the power supply device and the waveform diagram of the current recovered.

[0012] Figure 5 The waveform diagrams are of the current flowing through the capacitor in the power-saving supply control circuit that meets the power supply specification according to the first to third embodiments of the present invention.

[0013] Figure 6 Waveform diagram of a signal for controlling the current supplied by a conventional power supply device and the current recovered by the power supply device.

[0014] Figure 7 FIG. 4 is a waveform diagram of the current flowing through the capacitor in a conventional power supply device.

[0015] Figure 8 Schematic diagram of the connection state between the power-saving supply control circuit that meets the power supply specification and the load that changes over time according to the first to third embodiments of the present invention. DETAILED DESCRIPTION

[0016] The following is an explanation of the embodiments of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual dimensions. It is stated in advance. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

[0017] See also Figure 1 and Figure 8 ,in Figure 1 FIG. 1 is a circuit diagram of a power-saving supply control circuit that meets the power supply requirements of the first embodiment of the present invention. Figure 8 Schematic diagram of the connection state between the power-saving supply control circuit that meets the power supply specification and the load that changes over time according to the first to third embodiments of the present invention.

[0018] The power saving supply control circuit of the present invention comprises the following Figure 1 The first switch component T1, the capacitor Cb, the second switch component T2 and the control circuit CTR are shown. Figure 1 As shown, the first switch element T1 and the second switch element T2 can be transistors of the same type, but the present invention is not limited thereto. In practice, the first switch element T1 and the second switch element T2 included in the power-saving supply control circuit of the present invention can be replaced with transistors of different types.

[0019] If necessary, in any embodiment of the present invention, a filter circuit FLT may be further provided, connected to the first end and the second end of the power supply device PSU, and connected between the power supply device PSU and the power-saving supply control circuit of the present invention.

[0020] The first end of the first switch component T1 is connected to the first end (i.e., the positive power end) of the power supply device PSU (through the filter circuit FLT). The second end of the first switch component T1 is connected to the second end (i.e., the negative power end) of the power supply device PSU (through the filter circuit FLT). The power supply device PSU can be a power supply, a voltage source, or other device that supplies power.

[0021] The first end of the capacitor Cb is connected to the first end (i.e., the positive power end) of the power supply device PSU (through the filter circuit FLT), and is connected to the first end of the load (such as but not limited to the power converter PWR). The first end of the load (such as but not limited to the power converter PWR) is connected to the first end (i.e., the positive power end) of the power supply device PSU. The second end of the capacitor Cb is connected to the load (such as but not limited to the power converter PWR).

[0022] The first end of the second switch component T2 is connected to the second end of the capacitor Cb. The second end of the second switch component T2 is connected to the second end (ie, the negative power end) of the power supply device PSU (via the filter circuit FLT).

[0023] The control circuit CTR is connected to a control end of the first switch component T1 and a control end of the second switch component T2.

[0024] It is worth noting that after the first terminal (ie, the positive power terminal) of the power supply device PSU supplies current, for example (at Figure 8 The load is light (during the minimum load time) or Figure 8 When there is no load (a maximum no-load time in the example), the current flowing back to the second end (i.e., the negative power end) of the power supply device PSU may be lower than a current threshold required by a power specification and maintain for more than a specified time (e.g. Figure 8 - minimum load time shown).

[0025] If the current flowing back to the second end (i.e., the negative power end) of the power supply device PSU is lower than a current threshold required by a power protocol, the system will determine that the power supply device PSU is not connected to a load (such as but not limited to a power converter PWR) and require the power supply device PSU to stop supplying current. In this way, the load (such as but not limited to the power converter PWR) cannot obtain sufficient power.

[0026] Therefore, when the first end (i.e., the positive power end) of the power supply device PSU supplies current, the control circuit CTR controls the operation of the first switch component T1 and the second switch component T2, so that within a specified time, the sum of the current flowing through the first switch component T1 to the second end (i.e., the negative power end) of the power supply device PSU and the current flowing through the capacitor Cb, the load (for example, but not limited to the power converter PWR) and the second switch component T2 to the second end (i.e., the negative power end) of the power supply device PSU is not less than a current threshold required by an electric power specification.

[0027] That is to say, the power-saving supply control circuit of the present invention can make the current flowing back to the power supply device PSU meet the requirements of a power specification after the power supply device PSU supplies current, thereby allowing the power supply device PSU to continuously supply power to the load (for example but not limited to the power converter PWR), so that the load can obtain sufficient power while reducing the additional power consumption caused by the need to meet the power specification.

[0028] For example, the control circuit CTR turns off the second switch component T2, and at the same time turns on and controls the first switch component T1 to operate, so that the current flowing through the first switch component T1 to the second end of the power supply device PSU is equal to a current threshold, and at the same time the current flowing through the second switch component T2 to the second end of the power supply device PSU (i.e., the negative power end) is zero.

[0029] In particular, when the first switch element T1 is in the off state and the current flowing through the second switch element T2 is less than a current threshold, the control circuit CTR switches the second switch element T2 from the on state to the off state and switches the first switch element T1 from the off state to the on state.

[0030] In other words, when the first switch component T1 is in the off state and the current flowing through the second switch component T2 is less than the current threshold, the control circuit CTR reduces the on time of the second switch component T2 and increases the on time of the first switch component T1.

[0031] See also Figure 2 , which is a circuit diagram of a power-saving supply control circuit that meets the power supply specification according to the second embodiment of the present invention. The same contents of the second embodiment of the present invention as the first embodiment are not repeated in this article.

[0032] The difference between the second embodiment of the present invention and the first embodiment is that the power saving supply control circuit of the second embodiment of the present invention not only includes the following Figure 1 The first switch component T1, capacitor Cb, second switch component T2 and control circuit CTR shown in the figure further include a drive circuit LDR. The drive circuit LDR can be connected between the output terminal of the control circuit CTR and the control terminal of the second switch component T2.

[0033] The driving circuit LDR can drive the second switch element T2 to operate according to a conduction time signal received from the control circuit CTR.

[0034] For example, Figure 1 As shown, the first switch component T1 and the second switch component T2 are both n-type metal oxide semi-conductor field effect transistors (MOSFETs) turned on at the same voltage level, but the present invention is not limited thereto. In practice, the first switch component T1 and the second switch component T2 may be transistors of different types and may be turned on at different voltage levels.

[0035] The control circuit CTR can output a conduction time signal to the control end of the first switch component T1 and the drive circuit LDR. The first switch component T1 can operate according to the conduction time signal received from the control circuit CTR, so as to be turned on during the working cycle or the time when the conduction time signal is at a high level, and turned off during the non-working cycle or the time when the conduction time signal is at a low level. At the same time, the drive circuit LDR can drive the second switch component T2 according to the conduction time signal (inverted signal) received from the control circuit CTR, so that the second switch component T2 is turned off during the working cycle or the time when the conduction time signal is at a high level, and turned on during the non-working cycle or the time when the conduction time signal is at a low level.

[0036] Alternatively, the control circuit CTR may output an on-time signal to the control end of the first switch component T1, and output an off-time signal to the drive circuit LDR. The first switch component T1 may operate according to an on-time signal received from the control circuit CTR, so as to be turned on during the working cycle or high-level time of the on-time signal, and turned off during the non-working cycle or low-level time of the on-time signal. At the same time, the drive circuit LDR may drive the second switch component T2 to operate according to an off-time signal received from the control circuit CTR, so that the second switch component T2 is turned on during the working cycle or high-level time of the off-time signal (i.e., the non-working cycle or low-level time of the on-time signal), and turned off during the non-working cycle or low-level time of the off-time signal (i.e., the working cycle or high-level time of the on-time signal).

[0037] See also Figure 3 , which is a circuit diagram of a power-saving supply control circuit that meets the power supply specification according to the third embodiment of the present invention. The third embodiment of the present invention is the same as the second embodiment and is not repeated in this article.

[0038] In the power-saving supply control circuit of the third embodiment of the present invention, the driving circuit LDR may include an inverter NOT1 , the input end of the inverter NOT1 is connected to the output end of the control circuit CTR, and the output end of the inverter NOT1 is connected to the control end of the second switch component T2 .

[0039] The inverter NOT1 is configured to invert the level of a conduction time signal received from the control circuit CTR and output the inverted signal to the control end of the second switch element T2.

[0040] See also Figures 1 to 7 ,in Figure 4 The waveform diagram of the power-saving supply control circuit that meets the power supply specification of the first to third embodiments of the present invention is used to control the current supplied by the power supply device and the current recovered, Figure 5 The waveform diagram of the current flowing through the capacitor in the power-saving supply control circuit that meets the power supply specification of the first to third embodiments of the present invention is shown in FIG. Figure 6 The waveform diagram of the signal for controlling the current supplied by the power supply device and the current recovered by the power supply device is shown in FIG. Figure 7 FIG. 4 is a waveform diagram of the current flowing through the capacitor in a conventional power supply device.

[0041] Generally, the operation mode of a conventional power supply device is that the second switch component T2 is always kept turned on. When the current of the second switch component T2 is less than the current threshold, the first switch component T1 is turned on, so that the first switch component T1 can draw additional current Imps0 to meet the current threshold specified by the power supply device. However, since the power supply device may be far away from the back end (including the control circuit and the power converter), or an electromagnetic filter (EMI filter) is placed between the power supply device and the back end circuit, there will be a large inductance effect between the power supply device and the back end circuit, causing the current Imps0 drawn when the first switch component T1 is just turned on to be mainly provided by the capacitor Cb, and cannot be immediately drawn from the power supply device. Figure 6 and Figure 7 As shown, it takes a certain time for the system to balance before the current of the first switch component T1 is fully supplied by the power supply device, and at this time the current Ipse0 of the power supply device meets the current threshold. Therefore, the first switch component T1 in the traditional method needs to be turned on for a longer time than the required time of the specification to wait for the current of the power supply device to reach the current threshold, and this extra opening time causes additional power loss.

[0042] When the first switch component T1 of the power-saving supply control circuit of the present invention is turned on and the second switch component T2 is turned off, the current Ipse1 supplied by the first end (i.e., the positive end) of the power supply device PSU flows through the first switch component T1 to the second end (i.e., the negative end) of the power supply device PSU, but does not flow through the second switch component T2. Figure 4 As shown, the current Imps1 flowing through the first switch component T1 to the second end (i.e., the negative end) of the power supply device PSU approaches the current Ipse1 supplied by the first end (i.e., the positive end) of the power supply device PSU, and the current Ic1 flowing through the capacitor Cb is as shown in FIG. Figure 5 Therefore, the power-saving supply control circuit of the present invention does not need to increase the opening time of the first switch component T1, and can effectively reduce the power consumption of the power supply device PSU.

[0043] In summary, the present invention provides a power-saving supply control circuit that meets the power supply regulations. The power-saving supply control circuit of the present invention can make the current flowing back to the power supply device meet a current threshold required by the power specification after the power supply device supplies current, so as to prevent the power supply device from being determined to be unconnected to the load and being required to stop supplying current, resulting in the operation of the load, such as the power supply efficiency of the power converter supplying power to the electronic device being affected, while reducing the opening time of the first switch component to save unnecessary power supply of the power supply device, thereby effectively reducing the power consumption of the power supply device.

[0044] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the claims of the present invention. Therefore, all equivalent technical changes made using the description and drawings of the present invention are included in the claims of the present invention.

Claims

1. A power-saving supply control circuit that meets the power supply requirements, characterized in that: The power-saving supply control circuit that meets the power supply requirements includes: a first switch component, wherein a first end of the first switch component is connected to a first end of a power supply device, and a second end of the first switch component is connected to a second end of the power supply device; A capacitor, wherein a first end of the capacitor is connected to a first end of the power supply device and a first end of a load, and a second end of the capacitor is connected to a second end of the load; a second switch component, wherein a first end of the second switch component is connected to a second end of the capacitor, and a second end of the second switch component is connected to a second end of the power supply device; as well as A control circuit, connected to a control end of the first switch component and a control end of the second switch component; When the first end of the power supply device supplies current, the control circuit controls the operation of the first switch component and the second switch component so that the sum of the current flowing through the first switch component to the second end of the power supply device and the current flowing through the capacitor, the load and the second switch component to the second end of the power supply device is not less than the current threshold required by the power regulation within a specified time.

2. The power-saving supply control circuit according to claim 1, characterized in that: The load includes a power converter.

3. The power-saving supply control circuit according to claim 1, characterized in that: When the control circuit turns off the second switch component, the control circuit turns on the first switch component.

4. The power-saving supply control circuit according to claim 1, characterized in that: When the control circuit turns on the first switch component and turns off the second switch component, the control circuit controls the operation of the first switch component so that the current flowing through the first switch component to the second end of the power supply device is equal to the current threshold, and the current flowing through the second switch component to the second end of the power supply device is zero.

5. The power-saving supply control circuit according to claim 1, characterized in that: The control circuit outputs an on-time signal to the control end of the first switch component and outputs an off-time signal to the control end of the second switch component. The on-time signal has an opposite voltage level to the off-time signal.

6. The power-saving supply control circuit according to claim 1, characterized in that: The control circuit outputs a conduction time signal to the control end of the first switch component and the control end of the second switch component respectively; Wherein, during the working cycle of the conduction time signal or the time when the conduction time signal is at a high level, the first switch component is turned on and the second switch component is turned off; Wherein, during the non-working period or low-level time of the on-time signal, the first switch component is turned off and the second switch component is turned on.

7. The power-saving supply control circuit according to claim 1, characterized in that: When the first switch component is in the closed state and the current flowing through the second switch component is less than the current threshold, the control circuit switches the second switch component from the open state to the closed state, and switches the first switch component from the closed state to the open state.

8. The power-saving supply control circuit according to claim 1, characterized in that: When the first switch component is in the closed state and the current flowing through the second switch component is less than the current threshold, the control circuit reduces the on time of the second switch component and increases the on time of the first switch component.

9. The power-saving supply control circuit according to claim 1, characterized in that: The power-saving supply control circuit that meets the power supply requirements also includes: The driving circuit is connected between the output terminal of the control circuit and the control terminal of the second switch component, and is configured to drive the second switch component to operate according to a conduction time signal received from the control circuit.

10. The power-saving supply control circuit according to claim 9, characterized in that: The driving circuit inverts the level of the on-time signal received from the control circuit and outputs the inverted signal to the control end of the second switch component.

11. The power-saving supply control circuit according to claim 10, characterized in that: The driving circuit comprises: An inverter, wherein the input end of the inverter is connected to the output end of the control circuit, and the output end of the inverter is connected to the control end of the second switch component.

12. The power-saving supply control circuit according to claim 9, characterized in that: The driving circuit drives the second switch component to be turned off during a working cycle of the on-time signal or a time when the on-time signal is at a high level, and to be turned on during a non-working cycle of the on-time signal or a time when the on-time signal is at a low level.

13. The power-saving supply control circuit according to claim 12, characterized in that: The first switch component operates according to the on-time signal received from the control circuit to be turned on during a duty cycle or a high-level time of the on-time signal and turned off during a non-duty cycle or a low-level time of the on-time signal.

14. The power-saving supply control circuit according to claim 1, characterized in that: When the load is unloaded or lightly loaded, the control circuit turns on the first switch component and turns off the second switch component, and the current supplied by the first end of the power supply device flows through the first switch component to the second end of the power supply device.

15. The power-saving supply control circuit according to claim 1, characterized in that: The first switch component is a transistor.

16. The power-saving supply control circuit according to claim 1, characterized in that: The second switch component is a transistor.

17. The power-saving supply control circuit according to claim 1, characterized in that: The first terminal of the power supply device is a positive power terminal.

18. The power-saving supply control circuit according to claim 1, characterized in that: The second end of the power supply device is a negative power end.

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