Control apparatus, and power supply apparatus and LED lamp using same

Abstract

The present application discloses a control apparatus, and a power supply apparatus and an LED lamp using same. The control apparatus is applied to an electric energy conversion apparatus. The control apparatus comprises: a detection module, coupled to an output end of the electric energy conversion apparatus, and configured to sample an output signal of the output end, to generate and output a detection signal, wherein the output end is configured to be coupled to a load to supply power to the load by means of the output signal; and a signal processing module, coupled to the detection module, and configured to output a control signal to the electric energy conversion apparatus when determining, on the basis of the detection signal, that the output signal does not meet a preset requirement, so that the electric energy conversion apparatus adjusts an output signal of the electric energy conversion apparatus on the basis of the control signal.

Description

Control device, power supply device and LED lamp using the same Technical Field

[0001] The present application relates to the technical field of control circuits, and in particular to a control device and a power supply device and an LED lamp using the same. Background Art

[0002] To match the power requirements of the load, a power supply circuit typically converts external power to provide a power output that matches the load's requirements. For example, for an LED load, the power supply circuit can provide a constant current power output to operate the LED load.

[0003] During power conversion, a power supply circuit typically requires dynamic regulation based on the power output it provides to the load. However, related art techniques rely on indirectly detecting an electrical signal reflecting the power output to provide dynamic regulation to the power supply circuit. Because direct detection is not performed at the power supply circuit's output, the dynamic regulation results are unsatisfactory. This means that the power output provided to the load can have significant errors, which often cannot meet the requirements of high-precision applications. Continuing with the example of an LED load, the constant current provided by the related art power supply circuit has an error of 3%, which cannot be met in applications with more stringent constant current requirements.

[0004] Summary of the Invention

[0005] In view of the shortcomings of the related art described above, the purpose of the present application is to provide a control device and a power supply device and LED lamp using the same to achieve high-precision control, so that the output provided by the power supply device meets the accuracy requirements.

[0006] To achieve the above-mentioned purpose and other related purposes, the first aspect of the present application discloses a control device, which is applied to an electric energy conversion device, including: a detection module, which is used to couple the output end of the electric energy conversion device to output a detection signal based on the output signal provided by the output end; wherein the output end is used to couple the load to power the load through the output signal; a signal processing module, which is coupled to the detection module, and is used to output a control signal to the electric energy conversion device when it is determined according to the detection signal that the output signal does not meet the preset requirements, so that the electric energy conversion device adjusts its output signal based on the control signal.

[0007] In certain embodiments disclosed in the first aspect of the present application, the detection module includes: a sampling component coupled to the output end in series with the load; a first detection circuit coupled to both ends of the sampling component, for outputting a first detection signal to the signal processing module based on a voltage difference between the two ends of the sampling component; wherein the first detection signal has a first correlation relationship with the pressure difference, so that the signal processing module can determine the current value contained in the output signal based on the first detection signal.

[0008] In certain embodiments disclosed in the first aspect of the present application, the first detection circuit includes a first differential circuit coupled to both ends of the sampling component, configured to output the first detection signal based on a voltage difference between the two ends of the sampling component.

[0009] In certain embodiments disclosed in the first aspect of the present application, the first differential circuit includes a voltage divider circuit for dividing voltage in the first differential circuit.

[0010] In certain embodiments disclosed in the first aspect of the present application, the signal processing module is used to determine the current value contained in the output signal based on the first detection signal, the first correlation relationship, and the resistance value of the sampling component, and output a first control signal when the current value does not meet the preset requirements.

[0011] In certain embodiments disclosed in the first aspect of the present application, the detection module includes a second detection circuit, which is coupled to the output end of the electric energy conversion device and is used to output a second detection signal based on the output signal; wherein, the second detection signal has a second correlation relationship with the output signal, so that the signal processing module can determine the voltage value contained in the output signal based on the second detection signal.

[0012] In certain embodiments disclosed in the first aspect of the present application, the second detection circuit includes a second differential circuit coupled to the output end, configured to output the second detection signal based on the output signal.

[0013] In certain embodiments disclosed in the first aspect of the present application, the second differential circuit includes a voltage divider circuit for dividing voltage in the second differential circuit.

[0014] In certain embodiments disclosed in the first aspect of the present application, the signal processing module is used to determine the voltage value contained in the output signal based on the second detection signal and the second correlation relationship, and output a second control signal when the voltage value does not meet the preset requirements.

[0015] In certain embodiments disclosed in the first aspect of the present application, the detection module includes: a sampling component, coupled to the output end in series with the load; a first detection circuit, coupled to both ends of the sampling component, for outputting a first detection signal to the signal processing module based on the voltage difference between the two ends of the sampling component; wherein the first detection signal has a first correlation with the voltage difference, so that the signal processing module can determine the current value contained in the output signal based on the first detection signal; a second detection circuit, coupled to the output end of the power conversion device, for outputting a second detection signal based on the output signal; wherein the second detection signal has a second correlation with the output signal, so that the signal processing module can determine the voltage value contained in the output signal based on the second detection signal.

[0016] In certain embodiments disclosed in the first aspect of the present application, the signal processing module is configured to output a third control signal when it is determined, based on the first detection signal and the second detection signal, that a power value included in the output signal does not meet preset requirements.

[0017] In certain embodiments disclosed in the first aspect of the present application, the signal processing module is further configured to control the power conversion device to stop working when it is determined based on the detection signal provided by the detection module that the output signal exceeds a preset upper limit.

[0018] The second aspect of the present application discloses a power supply device, comprising: a rectifier module, for rectifying a received input signal to output a rectified signal; a filtering module, coupled to the rectifier module, for filtering the rectified signal and outputting it; an electric energy conversion device, coupled to the filtering module, for performing energy conversion on the filtered signal to provide an output signal; a control device as described in any embodiment disclosed in the first aspect of the present application, coupled to the output end of the electric energy conversion device, for outputting a control signal based on the output signal, so that the electric energy conversion device adjusts its output signal based on the control signal to meet preset requirements.

[0019] A third aspect of the present application discloses an LED lamp, comprising: an LED module; and a power supply device as described in any embodiment disclosed in the second aspect of the present application, coupled to the LED module and configured to supply power to the LED module.

[0020] In summary, the present application provides a control device and a power supply device and LED lamp using the same. By setting a detection module in the control device coupled to the output end of the electric energy conversion device, the control device can directly detect the output signal provided by the electric energy conversion device to the load, and a signal processing module coupled to the detection module is set. The signal processing module can make a judgment based on the detection signal output by the detection module and output a control signal, which serves as the basis for regulating the electric energy conversion device. In this way, the regulation accuracy of the electric energy conversion device is greatly improved, so that the output of the electric energy conversion device can meet the accuracy requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specific features of the inventions of this application are set forth in the appended claims. The features and advantages of the inventions of this application can be better understood by referring to the exemplary embodiments described in detail below and the accompanying drawings. A brief description of the drawings is as follows:

[0022] FIG1 is a circuit block diagram of a control device according to an embodiment of the present application.

[0023] FIG. 2 is a circuit block diagram of a detection module in one embodiment of the present application.

[0024] FIG3 is a schematic diagram showing the circuit structure of a first detection circuit in one embodiment of the present application.

[0025] FIG. 4 is a schematic diagram showing the circuit structure of a first differential circuit in one embodiment of the present application.

[0026] FIG. 5 is a circuit block diagram of a detection module in one embodiment of the present application.

[0027] FIG6 is a schematic diagram showing the circuit structure of a second detection circuit in one embodiment of the present application.

[0028] FIG. 7 is a schematic structural diagram of a second differential circuit according to an embodiment of the present application.

[0029] FIG8 is a circuit block diagram of a detection module in one embodiment of the present application.

[0030] FIG9 is a schematic diagram showing the circuit structure of a detection module in one embodiment of the present application.

[0031] FIG. 10 is a schematic diagram showing the circuit structure of a detection module in one embodiment of the present application.

[0032] FIG. 11 is a circuit block diagram of a power supply device according to an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following describes the implementation of the present application through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0034] In the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It should be understood that other embodiments may also be used, and that mechanical composition, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0035] Although the terms first, second, etc. are used to describe various elements or parameters in this article in some instances, these elements or parameters should not be limited by these terms. These terms are only used to distinguish an element or parameter from another element or parameter. For example, the first capacitor component can be referred to as the second capacitor component, and similarly, the second capacitor component can be referred to as the second capacitor component, without departing from the scope of the various described embodiments. The first capacitor component and the second capacitor component are both describing a capacitor component, but unless the context clearly indicates otherwise, they are not the same capacitor component. Similar situations also include the first resistor component and the second resistor component, or the first access terminal and the second access terminal.

[0036] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B, and C". Exceptions to this definition occur only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0037] In addition, it should be noted that in order to clearly illustrate the various inventive features disclosed in this application, this document describes each embodiment in the form of multiple embodiments as follows. However, this does not mean that each embodiment can only be implemented alone. Those skilled in the art can design feasible implementation examples together according to their needs, or simply replace the replaceable components / modules in different embodiments according to design requirements. In other words, the implementation methods taught in this case are not limited to the aspects described in the following embodiments, but also include the replacement and permutation and combination of each embodiment / component / module when feasible, which are described here first.

[0038] In some embodiments provided in the present application, a control device is disclosed for use in an electric energy conversion device. By setting a detection module coupled to the output end of the electric energy conversion device, the output signal provided by the electric energy conversion device to the load can be directly detected, and a signal processing module coupled to the detection module is set. The signal processing module can make a judgment based on the detection signal output by the detection module and output a control signal, which serves as a basis for regulating the electric energy conversion device. In this way, the regulation accuracy of the electric energy conversion device is greatly improved, so that the output of the electric energy conversion device can meet the accuracy requirements.

[0039] The power conversion device refers to a circuit capable of converting electrical signals into energy to power a load. In one embodiment, the power conversion device may include a DC-DC converter, which performs energy conversion by regulating the on / off switching of a switch. For example, the DC-DC converter may include a control circuit, a switching circuit, and an energy conversion circuit. The control circuit controls the switching circuit to conduct or disconnect, allowing the energy conversion circuit to perform power conversion and output electrical energy suitable for the load.

[0040] Please refer to FIG. 1 , which is a circuit block diagram of a control device in one embodiment of the present application. As shown in the figure, the control device 1 includes a detection module 10 and a signal processing module 11 .

[0041] The detection module 10 is used to couple to the output end of an electric energy conversion device (not shown), and the output end of the electric energy conversion device is used to couple to a load to provide an output signal Sout to power the load. The detection module 10 obtains the output signal Sout and outputs a detection signal Sdet according to the output signal Sout.

[0042] The signal processing module 11 is coupled to the detection module 10. When the output signal Sout is determined to not meet preset requirements based on the detection signal Sdet, the signal processing module 11 is configured to output a control signal Scon to the power conversion device, causing the power conversion device to adjust its output signal Sout based on the control signal Scon. The detection signal Sdet may include one or more detection signals, as long as the signal processing module 11 can use them to determine whether the output signal Sout meets the preset requirements.

[0043] The preset requirement corresponds to a load demand and may be set as an expected value corresponding to at least one electrical characteristic, such as voltage, current, and power. The output signal failing to meet the preset requirement means that at least one electrical characteristic of the output signal is inconsistent with the expected value corresponding to the preset requirement.

[0044] For example, in one case, in an example where the preset requirement is set to the expected value Ie corresponding to the current characteristic (i.e., the load requirement is constant current power supply), the output signal does not meet the preset requirement, which means that the current value contained in the output signal is inconsistent with the expected value Ie.

[0045] In another case, in an example where the preset requirement is set to an expected value Ve corresponding to the voltage characteristic (ie, the load requires constant voltage power supply), the output signal not meeting the preset requirement means that the voltage value included in the output signal is inconsistent with the expected value Ve.

[0046] In another case, in an example where the preset requirement is set to the expected value Pe corresponding to the power characteristic (ie, the load demand is constant power supply), the output signal does not meet the preset requirement, which means that the power value included in the output signal is inconsistent with the expected value Pe.

[0047] It should be understood that the terms "meeting preset requirements" or "consistent" mentioned above or subsequently herein refer to the deviation of at least one electrical characteristic in the output signal from the expected value corresponding to that electrical characteristic being within the permissible accuracy range. In this application, the deviation of at least one electrical characteristic in the output signal from the expected value corresponding to that electrical characteristic is controlled to be less than 3%, and preferably, less than 1%.

[0048] In one embodiment, please refer to FIG. 2 , which shows a circuit block diagram of a detection module in one embodiment of the present application. The figure illustrates a power conversion device 2, a load 3, and a signal processing module 11 to illustrate the coupling arrangement of the detection module 10. As shown, the power conversion device 2 has a first output terminal 20 and a second output terminal 21 for providing an output signal Sout. The load 3 is coupled to the first output terminal 20 and the second output terminal 21 to operate based on the output signal Sout. The detection module 10 includes a sampling component 101 and a first detection circuit 102. The sampling component 101 is coupled between the first output terminal 20 and the load 3 in series with the load 3. Thus, the output signal Sout flows into the load 3 through the sampling component 101. The current value flowing through the sampling component 101 is equal to the current value flowing through the load 3. The current value provided to the load 3 by the output signal Sout (i.e., the current value included in the output signal Sout) can be calculated by calculating the current value flowing through the sampling component 101. The first detection circuit 102 is coupled to both ends of the sampling component 101 and is configured to output a first detection signal Sdet1 to the signal processing module 11 based on the voltage difference between the two ends of the sampling component 101. It should be understood that FIG2 is only a schematic diagram of a circuit structure. In other embodiments, the sampling component 101 can also be coupled between the second output terminal 21 and the load 3 to achieve series connection with the load 3.

[0049] In one embodiment, the first output terminal 20 shown in FIG2 can serve as a positive terminal for outputting an electrical signal, and the second output terminal 21 can serve as a negative terminal for inputting an electrical signal. Furthermore, the second output terminal 21 can be coupled to a ground terminal GND, which can serve as a reference ground for the electric energy conversion device 2 (i.e., the level of the reference ground can be defined as the ground level).

[0050] In one embodiment, as shown in FIG2 , the sampling component 101 includes a resistor R0. The current value provided by the output signal Sout to the load 3 can be obtained based on the voltage difference across the resistor R0 and its resistance value. In other embodiments, the sampling component 101 may also include a component composed of multiple resistors connected according to a certain rule, and may also include other electronic components, which is not limited in this application.

[0051] Continuing with FIG2 , the first detection signal Sdet1 output by the first detection circuit 102 has a first correlation with the voltage difference across the sampling element 101, enabling the signal processing module 11 to determine the current value flowing through the sampling element 101 based on the first detection signal Sdet1. Since the current value flowing through the sampling element 101 is equal to the current value flowing through the load 3, the signal processing module 11 can determine the current value provided to the load 3 by the output signal Sout based on the first detection signal Sdet.

[0052] In one embodiment, the first correlation relationship is set as a linear relationship. Taking FIG2 as an example, that is, the first detection signal Sdet1 = k1 × (V1 - V2) + b1, where k1 represents a proportionality coefficient, b1 is a constant term that can be zero, V1 represents the electrical signal at the end of the sampling component 101 connected to the first output terminal 20, V2 represents the electrical signal at the end of the sampling component 101 connected to the load, and V1 - V2 represents the voltage difference across the sampling component 101. Depending on the size of the proportionality coefficient and / or the value of the constant term, the first detection signal Sdet1 can amplify or reduce the voltage difference across the sampling component 101.

[0053] Of course, in other embodiments, the first correlation relationship can also be set to any relationship such as integration, differentiation, etc., as long as the signal processing module 11 can determine the voltage difference across the sampling component 101 based on the first detection signal Sdet1 and further determine the current value flowing through the sampling component 101.

[0054] Referring to FIG. 3 in conjunction with FIG. 2 , FIG. 3 is a schematic diagram illustrating the circuit structure of a first detection circuit according to an embodiment of the present application. As shown in the figure, the first detection circuit 102 has a first input terminal 1021, a second input terminal 1022, and an output terminal 1023. The first detection circuit 102 is coupled to both ends of the sampling component 101 via the first input terminal 1021 and the second input terminal 1022, and outputs a first detection signal Sdet1 via the output terminal 1023. The first detection circuit 102 includes a first differential circuit 1020 coupled to both ends of the sampling component 101 for performing a proportional operation on the voltage difference between the two ends of the sampling component 101 to output the first detection signal Sdet1. Specifically, the positive input terminal of the first differential circuit 1020 can be coupled as the first input terminal 1021 of the first detection circuit 102 to one end of the resistor R0 connected to the first output terminal 20, the negative input terminal of the first differential circuit 1020 can be coupled as the second output terminal 1022 of the first detection circuit 102 to the other end of the resistor R0, and the output terminal of the first differential circuit 1020 can be coupled as the output terminal 1023 of the first detection circuit 102 to the signal processing module 11, so that the first differential circuit 1020 outputs the first detection signal Sdet1 to the signal processing module 11.

[0055] Furthermore, the first differential circuit 1020 may include an operator 1024 and peripheral resistors. Taking FIG3 as an example, the peripheral circuit includes resistors R1, R2, R5, and R6. The positive input terminal of the operator 1024 is coupled to the first input terminal 1021 of the first detection circuit 102 via resistor R1. One end of resistor R2 is coupled to the end of resistor R1 connected to the positive input terminal of the operator 1024. The other end of resistor R2 is grounded. The negative input terminal of the operator 1024 is coupled to the second input terminal 1022 of the first detection circuit 102 via resistor R5. One end of resistor R6 is coupled to the end of resistor R5 connected to the negative input terminal of the operator 1024. The other end of resistor R6 and the output terminal of the operator 1024 are both coupled to the output terminal 1023 of the first detection circuit 102.

[0056] Taking the circuit structures shown in FIG2 and FIG3 as an example, according to the “virtual short” and “virtual open” of the operator, the relationship between the first detection signal Sdet1 output by the first detection circuit 102 based on the voltage difference across the sampling component 101 and the electrical signal Vout1 output from the output end of the operator 1024 is:

[0057] Sdet1 = Vout1 = ((1+R6 / R5)×(V1×R2 / (R1+R2))-V2×(R6 / R5), where Vout1 represents the electrical signal output from the output end of the operator 1024.

[0058] 3 , the output terminal of the operator 1024 is directly coupled to the output terminal 1023. Therefore, the first detection signal Sdet1 is equal to Vout1, the output of the operator 1024. Furthermore, by setting the value of the external resistor, the first detection signal Sdet1 can have a linear relationship with the voltage difference across the sampling element 101.

[0059] In one example, R6 / R5=R2 / R1 is set, then the first detection signal Sdet1=(R6 / R5)×(V1−V2), that is, it can be understood that the proportional coefficient k1 in the linear relationship is R6 / R5, and b1 is 0.

[0060] In order to prevent the output signal provided by the output end of the electric energy conversion device from being too large and impacting the detection module or signal processing module, thereby damaging the circuit, in one embodiment, the first differential circuit further includes a voltage divider circuit. Please refer to Figure 4, and please refer to Figures 2 and 3 in combination. Figure 4 shows a schematic circuit structure diagram of the first differential circuit in one embodiment of the present application. As shown in the figure, the first differential circuit 1020, in addition to including the operator 1024 and peripheral resistors as shown in Figure 3, further includes a voltage divider circuit 10200 for dividing the voltage in the first differential circuit 1020 to reduce the electrical signal provided to the operator 1024 or reduce the output first detection signal Sdet1, so as to prevent the circuit from being impacted by the excessive electrical signal.

[0061] It should be understood that the resistors in the first differential circuit are merely an equivalent schematic. Skilled technicians can, based on the description of this application, set each resistor as a component composed of multiple resistors connected and combined according to certain rules. The component can also include other electronic components, and this application does not limit this.

[0062] The voltage divider circuit 10200 can be configured as one or more circuits. For example, as shown in FIG4 , three voltage divider circuits 10200 are provided, one each coupled to the line from the first input terminal 1021 to the positive input terminal of the operator 1024, the other to the negative input terminal of the operator 1024, and the other to the output terminal 1023 of the operator 1024, respectively, to share the voltages on the coupled circuits. For ease of distinction and description, the voltage divider circuit 10200 coupled to the line from the first input terminal 1021 to the positive input terminal of the operator 1024 will be referred to as the first voltage divider circuit, the voltage divider circuit 10200 coupled to the line from the second input terminal 1022 to the negative input terminal of the operator 1024 will be referred to as the second voltage divider circuit, and the voltage divider circuit 10200 coupled to the line from the output terminal 1024 to the output terminal 1023 of the operator 1024 will be referred to as the third voltage divider circuit.

[0063] The first voltage divider circuit includes resistors R9 and R10. Resistor R9 is coupled between resistor R1 and the positive input terminal of the operator 1024, and resistor R10 is coupled between the positive input terminal of the operator 1024 and the ground terminal of resistor R2. The first voltage divider circuit reduces the voltage flowing into the positive input terminal of the operator 1024 by voltage division. Specifically, compared to a circuit structure without the first voltage divider circuit (e.g., the circuit structure shown in FIG3 ), the electrical signal at the positive input terminal of the operator 1024 is reduced from V1×R2 / (R1+R2) to V1×R2 / (R1+R2)×R10 / (R9+R10). The second voltage divider circuit includes resistors R3 and R4. Resistor R3 is coupled between the second input terminal 1022 and resistor R5. Resistor R4 has one end coupled to the end where resistors R3 and R5 are connected, and the other end is grounded.

[0064] The second voltage divider circuit reduces the voltage flowing into the negative input terminal of the operator 1024 through voltage division. Specifically, compared to a circuit structure without the second voltage divider circuit (e.g., the circuit structure shown in FIG3 ), the electrical signal at the negative input terminal of the operator 1024 is reduced from V2 to V2×R4 / (R3+R4). The third voltage divider circuit includes resistors R7 and R8. Resistor R7 is coupled between the output terminal of the operator 1024 and the output terminal 1023 of the first detection circuit. Resistor R8 has one end coupled to the output terminal 1023 and the other end grounded.

[0065] The third voltage-divider circuit reduces the electrical signal output by the first detection circuit through voltage division, that is, reduces the first detection signal Sdet1. Specifically, compared with the case where the third voltage-divider circuit is not provided, the first detection signal Sdet1 output to the signal processing module from the output terminal 1023 of the first detection circuit is reduced from Vout1 to Vout1×R8 / (R7+R8).

[0066] It should be noted that Figure 4 shows the example of setting up three voltage divider circuits, which is not a limitation of the present application. In other embodiments, the voltage divider circuit can be configured as any one, two or three of the first to third voltage divider circuits. For example, in the example of setting up only one of the first to third voltage divider circuits, it is only necessary to omit the other two voltage divider circuits in Figure 4. In the example of setting up two of the first to third voltage divider circuits, it is only necessary to omit the other one of the voltage divider circuits in Figure 4.

[0067] Furthermore, in the circuit structure shown in FIG4 , due to the presence of the voltage divider circuit, the relationship between the first detection signal Sdet1 output by the first detection circuit and the electrical signal Vout1 output by the output terminal of the operator 1024 is:

[0068] Vout1=((1+R6 / R5)×(V1×R2 / (R1+R2)×R10 / (R9+R10))-V2×R4 / (R3+R4)×(R6 / R5);

[0069] Sdet1 = Vout1 × R8 / (R7 + R8).

[0070] Furthermore, the values ​​of the peripheral resistors and the resistors in the voltage divider circuit can be set so that the first detection signal Sdet1 and the voltage difference across the sampling component 101 have a linear relationship.

[0071] In one example, R6 / R5=R2 / R1 and R10 / R9=R4 / R3 are set, then the first detection signal Sdet1=(R6 / R5)×(V1-V2)×R4 / (R3+R4)×R8 / (R7+R8), that is, it can be understood that the proportional coefficient k1 in the linear relationship is R6 / R5×R4 / (R3+R4)×R8 / (R7+R8), and b1 is 0.

[0072] In any of the aforementioned embodiments in which the detection module includes a sampling component and a first detection circuit (e.g., the circuit structures shown in any of the embodiments of FIG. 2 to FIG. 4 and the related descriptions thereof), the detection signal output by the detection module 10 includes a first detection signal Sdet1 having a first correlation with the voltage difference across the sampling component 101. The signal processing module 11 may be configured to determine a current value flowing through the sampling component 101 based on the first detection signal Sdet1, the first correlation, and the resistance value of the sampling component 101. In other words, the signal processing module 11 may determine the current value included in the output signal Sout.

[0073] Furthermore, the signal processing module 11 compares the obtained current value with the expected value corresponding to the preset requirement. When the current value contained in the output signal Sout is inconsistent with the expected value of the current characteristic, the signal processing module 11 will output a first control signal to the power conversion device. The power conversion device will adjust the on or off timing of its internal switching circuit according to the first control signal after receiving the first control signal, so that the current value contained in the final output signal Sout of the power conversion device meets the expected value, thereby realizing constant current power supply.

[0074] In other words, in any embodiment in which the detection module is configured as the above-mentioned sampling component and the first detection circuit, the applicable electric energy conversion device is configured as a constant current conversion device, which can achieve constant current output based on the first control signal.

[0075] In one embodiment, please refer to FIG5 , which shows a circuit block diagram of a detection module in one embodiment of the present application. The figure shows an electric energy conversion device 2, a load 3, and a signal processing module 11 to illustrate the coupling method of the detection module 10. As shown in the figure, the electric energy conversion device 2 has a first output terminal 20 and a second output terminal 21 to provide an output signal Sout. The load 3 is coupled to the first output terminal 20 and the second output terminal 21 to operate based on the output signal Sout. The detection module 10 includes a second detection circuit 103. The second detection circuit 103 is coupled to the two output terminals (20, 21) of the electric energy conversion device 2 and is configured to output a second detection signal Sdet2 to the signal processing module 11 based on the output signal Sout outputted at the two output terminals (20, 21).

[0076] In one embodiment, the first output terminal 20 shown in FIG5 can serve as a positive terminal for outputting an electrical signal, and the second output terminal 21 can serve as a negative terminal for inputting an electrical signal. Furthermore, the second output terminal 21 can be coupled to a ground terminal GND, which can serve as a reference ground for the electric energy conversion device 2 (i.e., the level of the reference ground can be defined as the earth level). The electrical signal between the first output terminal 20 and the second output terminal 21 is the output signal Sout. For example, as shown in FIG5 , the electrical signal at the first output terminal 20 of the electric energy conversion device 2 is V3, and the electrical signal at the second output terminal 21 is V4. The output signal Sout is equivalent to V3-V4.

[0077] Continuing with FIG5 , the second detection signal Sdet2 output by the second detection circuit 103 has a second correlation with the output signal Sout, enabling the signal processing module 11 to determine the voltage value included in the output signal Sout based on the second detection signal Sdet2. In one embodiment, the second correlation is set to a linear relationship. For example, as shown in FIG5 , the second detection signal Sdet2 = k2 × (V3 - V4) + b2 = k2 × Sout + b2, where k2 represents a proportionality factor and b2 is a constant term that can be zero. Depending on the set proportionality factor, the second detection signal Sdet2 can amplify or reduce the output signal Sout. Of course, in other embodiments, the second correlation can also be set to any other relationship, such as integration or differentiation, as long as the signal processing module 11 can determine the voltage value included in the output signal Sout based on the second detection signal Sdet2.

[0078] Please refer to FIG6 , in conjunction with FIG5 , which shows a schematic diagram of the circuit structure of a second detection circuit in one embodiment of the present application. As shown in the figure, the second detection circuit 103 has a first input terminal 1031, a second input terminal 1032, and an output terminal 1033. The second detection circuit 103 is coupled to the first output terminal 20 of the power conversion circuit 2 via the first input terminal 1031, is coupled to the second output terminal 21 of the power conversion circuit 2 via the second input terminal 1032, and outputs a second detection signal Sdet2 to the signal processing module 11 via the output terminal 1033. The second detection circuit 103 includes a second differential circuit 1030, which is coupled to the two output terminals (20, 21) of the power conversion device 2 and is configured to perform a linear operation on the output signal Sout to output the second detection signal Sdet2.

[0079] Specifically, the positive input terminal of the second differential circuit 1030 can be coupled to the first output terminal 20 of the power conversion circuit 2 as the first input terminal 1031 of the second detection circuit 103, the negative input terminal of the second differential circuit 1030 can be coupled to the second output terminal 21 of the power conversion circuit 2 as the second input terminal 1032 of the second detection circuit 103, and the output terminal of the second differential circuit 1030 can be coupled to the signal processing module 11 as the output terminal 1033 of the second detection circuit 103, so that the second differential circuit 1030 outputs the second detection signal Sdet2 to the signal processing module 11.

[0080] Furthermore, the second differential circuit 1030 may include an operator 1034 and peripheral resistors. For example, as shown in FIG6 , the peripheral circuit includes resistors R11, R12, R13, and R14. The positive input terminal of the operator 1034 is coupled to the first input terminal 1031 of the second detection circuit 103 via resistor R11. One end of resistor R12 is coupled to the end of resistor R11 connected to the positive input terminal of the operator 1034. The other end of resistor R12 is grounded. The negative input terminal of the operator 1034 is coupled to the second input terminal 1032 of the second detection circuit 103 via resistor R13. One end of resistor R14 is coupled to the end of resistor R13 connected to the negative input terminal of the operator 1034. The other end of resistor R14 and the output terminal of the operator 1034 are both coupled to the output terminal 1033 of the second detection circuit 103.

[0081] Taking the circuit structures shown in FIG5 and FIG6 as an example, according to the “virtual short” and “virtual open” of the operator, the relationship between the second detection signal Sdet2 output by the second detection circuit 103 and the electrical signal Vout2 output by the output terminal of the operator 1034 can be expressed as follows:

[0082] Sdet2=Vout2=((1+R14 / R13)×(V3×R12 / (R11+R12))-V4×(R14 / R13), where Vout2 represents the electrical signal output by the output terminal of the operator 1034. Since the output terminal of the operator 1034 in Figure 3 is directly coupled to the output terminal 1033 of the second detection circuit 103, the second detection signal Sdet2 is equal to the output of the operator 1034.

[0083] Furthermore, the values ​​of the peripheral resistors can be set so that the second detection signal Sdet2 has a linear relationship with the output signal Sout. In one example, R14 / R13 is set to R12 / R11, so that the second detection signal Sdet2 = (R14 / R13) × (V3-V4), where V3-V4 is equivalent to Sout. In other words, the second detection signal Sdet2 = (R14 / R13) × Sout. It can be understood that the proportional coefficient k2 in the linear relationship is R14 / R13, and b2 is 0.

[0084] In one embodiment, the second differential circuit may further include a voltage divider circuit. Referring to FIG. 7 in conjunction with FIG. 5 and FIG. 6 , FIG. 7 shows a schematic diagram of the structure of the second differential circuit according to one embodiment of the present application. In addition to the arithmetic unit 1034 and peripheral resistors shown in FIG. 6 , the second differential circuit 1030 further includes a voltage divider circuit 10300 for dividing the voltage within the second differential circuit 1030 to reduce the electrical signal provided to the arithmetic unit 1034 or to reduce the output second detection signal Sdet2, thereby preventing the circuit from being impacted by excessive electrical signals.

[0085] Among them, the voltage divider circuit 10300 can be configured as one or more. Figure 7 takes three configurations as an example, which are respectively coupled to the line from the first input terminal 1031 to the positive input terminal of the operator 1034, the line from the second input terminal 1032 to the negative input terminal of the operator 1034, and the line from the output terminal of the operator 1034 to the output terminal 1033, so as to respectively share the voltage on the coupled lines.

[0086] For the sake of convenience in distinction and description, the voltage divider circuit 10300 on this line will be referred to as the fourth voltage divider circuit, the voltage divider circuit 10300 on the line coupled from the second input terminal 1032 to the negative input terminal of the operator 1034 will be referred to as the fifth voltage divider circuit, and the voltage divider circuit 10300 on the line coupled from the output terminal of the operator 1034 to the output terminal 1033 will be referred to as the sixth voltage divider circuit.

[0087] As shown in FIG7 , the fourth voltage divider circuit includes resistors R19 and R20. Resistor R19 is coupled between resistor R11 and the positive input terminal of operator 1034. Resistor R20 is coupled between the positive input terminal of operator 1034 and the ground terminal of resistor R22. The fourth voltage divider circuit reduces the voltage flowing into the positive input terminal of operator 1034 by voltage division. Specifically, compared to a circuit structure without the fourth voltage divider circuit (e.g., the circuit structure shown in FIG6 ), the electrical signal at the positive input terminal of operator 1034 is reduced from V3×R12 / (R11+R12) to V3×R12 / (R11+R12)×R20 / (R19+R20). The fifth voltage divider circuit includes resistors R15 and R16. Resistor R15 is coupled between the second input terminal 1032 and resistor R13. Resistor R16 has one end coupled to the end of resistor R15 connected to resistor R13, and the other end is grounded.

[0088] The fifth voltage divider circuit reduces the voltage flowing into the negative input terminal of the operator 1034 by voltage division. Specifically, compared to a circuit structure without the fifth voltage divider circuit (e.g., the circuit structure shown in FIG6 ), the electrical signal at the negative input terminal of the operator 1034 is reduced from V4 to V4×R16 / (R15+R16). The sixth voltage divider circuit includes resistors R17 and R18. Resistor R17 is coupled between the output terminal of the operator 1034 and the output terminal 1033 of the second detection circuit. Resistor R18 has one end coupled to the output terminal 1033 and the other end coupled to ground.

[0089] The sixth voltage-divider circuit reduces the electrical signal output by the second detection circuit through voltage division, that is, reduces the second detection signal Sdet2. Specifically, compared with the case where the sixth voltage-divider circuit is not set, the second detection signal Sdet2 output to the signal processing module from the output terminal 1033 of the second detection circuit is reduced from Vout2 to Vout2×R18 / (R17+R18).

[0090] Furthermore, in the circuit structure shown in FIG7 , due to the presence of the voltage divider circuit, the relationship between the second detection signal Sdet2 output by the second detection circuit and the electrical signal Vout2 output by the output terminal of the operator 1034 can be expressed as follows:

[0091] Vout2=((1+R14 / R13)×(V3×R12 / (R11+R12)×R20 / (R19+R20))-V4×R16 / (R15+R16)×(R14 / R13);

[0092] Sdet2=Vout2×R18 / (R17+R18).

[0093] Furthermore, the second detection signal Sdet2 and the output signal Sout (ie, V3 − V4 ) may have a linear relationship by setting the values ​​of the peripheral resistors and the resistors in the voltage divider circuit.

[0094] In one example, R14 / R13 is set to R12 / R11, and R20 / R19 is set to R16 / R15. Then, the second detection signal Sdet2 is set to (R14 / R13)×(V3-V4)×R16 / (R15+R16)×R18 / (R17+R18). That is, it can be understood that the proportional coefficient k1 in the linear relationship is R14 / R13×R16 / (R15+R16)×R18 / (R17+R18), and b1 is 0.

[0095] It should be noted that Figure 7 is only a schematic diagram of a voltage divider circuit configuration and is not a limitation of the present application. In other embodiments, the voltage divider circuit in the second differential circuit can be configured as any one, two or three of the fourth to sixth voltage divider circuits. For example, in the example of setting only one of the fourth to sixth voltage divider circuits, it is only necessary to omit the remaining voltage divider circuits in Figure 7. In the example of setting two of the fourth to sixth voltage divider circuits, it is only necessary to omit the other voltage divider circuit in Figure 7.

[0096] It should be understood that the resistors in the second differential circuit are merely an equivalent schematic. A person skilled in the art can, based on the description of this application, set each resistor as a component composed of multiple resistors connected and combined according to certain rules. The component may also include other electronic components, and this application does not impose any restrictions on this.

[0097] In any embodiment where the detection module is configured as the above-mentioned embodiment including the second detection circuit (e.g., the circuit structure shown in any embodiment of FIG. 5 to FIG. 7 and the related description thereof), the detection signal output by the detection module 10 includes a second detection signal Sdet2 having a second correlation relationship with the output signal Sout. The signal processing module 11 can be used to determine the voltage value contained in the output signal Sout based on the second detection signal Sdet2 and the second correlation relationship. Furthermore, the signal processing module 11 compares the obtained voltage value with the expected value corresponding to the preset requirement. When the voltage value contained in the output signal Sout is inconsistent with the expected value of the voltage characteristic, the signal processing module 11 outputs a second control signal to the electric energy conversion device. Upon receiving the second control signal, the electric energy conversion device adjusts the on / off timing of its internal switching circuit according to the second control signal, so that the voltage value contained in the final output signal Sout of the electric energy conversion device meets the expected value, thereby achieving constant voltage power supply. In other words, in any embodiment where the detection module is configured as the above-mentioned embodiment including the second detection circuit, the electric energy conversion device to which it is applicable is configured as a constant voltage conversion device, which can achieve constant voltage output based on the second control signal.

[0098] In one embodiment, please refer to FIG8 , which shows a circuit block diagram of a detection module in one embodiment of the present application. The diagram illustrates an electric energy conversion device 2, a load 3, and a signal processing module 11 to illustrate the coupling arrangement of the detection module 10. As shown, the electric energy conversion device 2 has a first output terminal 20 and a second output terminal 21 for providing an output signal Sout. The load 3 is coupled to the first output terminal 20 and the second output terminal 21 to operate based on the output signal Sout. The detection module 10 includes a sampling component 101, a first detection circuit 102, and a second detection circuit 103. In this embodiment, the sampling component 101 is coupled between the second output terminal 21 and the load 3 to achieve series connection with the load 3. In other embodiments, the sampling component 101 may be coupled between the first output terminal 20 and the load 3 to achieve series connection with the load 3, as shown in FIG2 . This application is not limited to this.

[0099] Correspondingly, the second detection circuit 103 is coupled to the first input terminal 20 and the second input terminal 21 (which can also be understood as the end of the sampling component 101 connected to the second input terminal 21) as an example. In other embodiments, the second detection circuit 103 can also be coupled to the first input terminal 20 and the end of the sampling component 101 connected to the load 3. However, it should be noted that the voltage difference across the sampling component 101 needs to be added when determining the voltage value included in the output signal Sout based on the second detection signal Sdet2. In addition, to facilitate the description and distinguish it from Figures 2 to 8, in Figure 8, the electrical signal provided by the first output terminal 20 of the electric energy conversion device is labeled as V5, the electrical signal at the end of the sampling component 101 connected to the second output terminal 21 is labeled as V7 (i.e., in the diagram of Figure 8, the output signal Sout is equivalent to V5-V7), and the electrical signal at the end of the sampling component 101 connected to the load 3 is labeled as V6.

[0100] In one embodiment, the circuit structure of the sampling component 101 and the first detection circuit 102 shown in FIG8 can be configured as described in any of the embodiments in FIG2 to FIG4 and their related descriptions. The circuit structure of the second detection circuit 102 shown in FIG8 can be configured as described in any of the embodiments in FIG5 and FIG7 and their related descriptions. The specific circuit structure and operating principle of the first detection circuit 102 cooperating with the sampling component 101 to output the first detection signal Sdet1 can be found in the aforementioned descriptions of FIG2 to FIG4 and their related descriptions. The specific circuit structure and operating principle of the second detection circuit 102 outputting the second detection signal Sdet2 can be found in the aforementioned descriptions of FIG5 and FIG7 and their related descriptions, and will not be repeated here.

[0101] In order to simplify the circuit structure, in some embodiments, the first detection circuit 102 and the second detection circuit 103 can reuse at least some electronic components or circuits. For example, the first detection circuit 102 and the second detection circuit 103 can reuse the voltage divider circuit therein, or the first detection circuit 102 can reuse the peripheral resistors in the second detection circuit 103 as the voltage divider circuit, or the second detection circuit 103 can reuse the peripheral resistors of the first detection circuit 102 as the voltage divider circuit.

[0102] It should be noted that in this embodiment, due to the reuse of electronic components or circuits, the two input terminals of the second detection circuit 103 are not necessarily directly coupled to the two output terminals of the electric energy conversion device to detect the output signal. At least one of the input terminals can also be coupled to the first detection circuit 102 to detect the output signal. Of course, the two input terminals of the first detection circuit 102 are not necessarily directly coupled to the two terminals of the sampling component. At least one of the input terminals can also be coupled to the second detection circuit 103 to obtain the voltage difference between the two terminals of the sampling component. This application does not limit the specific coupling position of the input terminals of each detection circuit. Constant power control can be achieved as long as the signal processing module can determine the voltage value contained in the output signal Sout through the second detection signal Sdet2 output by the second detection circuit 103, or can determine the current value contained in the output signal Sout through the first detection signal Sdet1 output by the first detection circuit 102. The following is an illustration of the embodiments shown in Figures 9 and 10, which should not be understood as limiting the present application.

[0103] Please refer to FIG9 , which shows a schematic diagram of the circuit structure of a detection module in one embodiment of the present application. The figure illustrates the power conversion device 2, the load 3, and the signal processing module 11 to illustrate the coupling arrangement of the detection module 10. As shown in FIG9 , the power conversion device 2 has a first output terminal 20 and a second output terminal 21 for providing an output signal Sout. The load 3 is coupled to the first output terminal 20 and the second output terminal 21 to operate based on the output signal Sout. As shown in FIG9 , the detection module 10 includes a sampling component 101, a first detection circuit 102, and a second detection circuit 103. The sampling component 101 is coupled between the second output terminal 21 and the load 3 to achieve a series connection with the load 3. The circuit structure of the sampling component 101 can be configured similarly to the circuit structure of the embodiment shown in FIG2 . The first detection circuit 102 is coupled to the sampling component 101 via its first input terminal 1021 and its second input terminal 1022. The first detection circuit 102 is configured to further include the second voltage divider circuit shown in FIG4 , in addition to the circuit structure shown in FIG3 .

[0104] The first input terminal 1031 of the second detection circuit 103 is coupled to the first output terminal 20 of the power conversion device 2, and the second input terminal 1032 is coupled to the first detection circuit 102. The second detection circuit 103 is further coupled to the second voltage divider circuit 1025 in the first detection circuit 102, so that the second voltage divider circuit 1025 can share the voltage signal provided to the second detection circuit 103 by the second output terminal 21 of the power conversion device 2. The second detection circuit 103 is configured as the circuit structure shown in Figure 6. The specific circuit structure of the sampling component 101, the first detection circuit 102, and the second detection circuit 103, as well as the working principles for respectively obtaining the first detection signal Sdet1 and the second detection signal Sdet2, can be found in the aforementioned description of Figures 3 to 6, and will not be repeated here.

[0105] Please refer to Figure 10, which shows a schematic diagram of the circuit structure of a detection module in one embodiment of the present application. The figure identifies the power conversion device 2, the load 3, and the signal processing module 11 to illustrate the coupling method of the detection module 10. As shown in Figure 10, the power conversion device 2 has a first output terminal 20 and a second output terminal 21 to provide an output signal Sout. The load 3 is coupled to the first output terminal 20 and the second output terminal 21 to operate based on the output signal Sout. As shown in Figure 10, the detection module 10 includes a sampling component 101, a first detection circuit 102, and a second detection circuit 103. The sampling component 101 is coupled between the first output terminal 20 and the load 3 to achieve series connection with the load 3. The circuit structure of the sampling component 101 can be configured as the circuit structure of the embodiment shown in Figure 2.

[0106] A first input terminal 1021 of the first detection circuit 102 is coupled to an end of the sampling component 101 connected to the first output terminal 20 of the power conversion device 2. A second input terminal 1022 of the first detection circuit 102 is coupled to the second detection circuit 103. A first input terminal 1031 of the second detection circuit 103 is coupled to an end of the sampling component 101 connected to the load 3. A second input terminal 1032 of the second detection circuit 103 is coupled to the second output terminal 21 of the power conversion device 2.

[0107] The first detection circuit 102 is configured to further include the first and third voltage divider circuits shown in FIG4 on the basis of the circuit structure shown in FIG3 . The second detection circuit 103 is configured to have the circuit structure shown in FIG7 . Furthermore, the second input terminal 1022 of the first detection circuit 102 is coupled to the positive input terminal of the operator 1034 in the second detection circuit 102 , so as to obtain the voltage signal at the end of the sampling component 101 connected to the load 3 via the first input terminal 1031 of the second detection circuit 103 . In addition, the resistors R11 and R12 connected to the positive input terminal of the operator 1034 in the second detection circuit 102 can also be used to share the voltage signal at the end of the sampling component 101 connected to the load 3 . In other words, the resistors R11 and R12 in the second detection circuit 103 perform the function of the second voltage divider circuit shown in FIG4 . This can reduce the impact of the voltage signal on the first detection circuit 102 while reducing the use of components. The circuit structures of the sampling component 101 , the first detection circuit 102 and the second detection circuit 103 and the working principles of respectively obtaining the first detection signal Sdet1 and the second detection signal Sdet2 can be found in the above descriptions of FIG. 3 to FIG. 7 , which will not be repeated here.

[0108] In any embodiment in which the detection module is configured as the aforementioned embodiment including a sampling component, a first detection circuit, and a second detection circuit (e.g., the circuit structure shown in any of the embodiments of FIG8 to FIG10 and the related description thereof), the detection signal output by the detection module 10 includes a first detection signal Sdet1 and a second detection signal Sdet2. The signal processing module 11 can determine whether the power value included in the output signal Sout meets a preset requirement based on the first detection signal Sdet1 and the second detection signal Sdet2, and output a third control signal if the power value does not meet the preset requirement. Upon receiving the third control signal, the power conversion device adjusts the on / off timing of its internal switching circuit according to the third control signal, thereby causing the power conversion device to adjust the voltage value or current value included in the output signal Sout so that the power value included therein meets the expected value, thereby achieving constant power supply.

[0109] For example, in some examples, the signal processing module 11 can determine the voltage value included in the output signal Sout based on the second detection signal Sdet2 and the second correlation relationship, and can determine the current value included in the output signal Sout based on the first detection signal Sdet1, the first correlation relationship, and the resistance of the sampling component 101, and can further determine the corresponding power value in the output signal Sout based on the current value and the voltage value. The signal processing module 11 compares the obtained power value with the expected value of the power characteristic in the preset requirements. When the power value included in the output signal Sout is inconsistent with the expected value of the power characteristic, the signal processing module 11 will output a third control signal to the power conversion device.

[0110] In some examples, for example, in an example where the electric energy conversion device is configured as a constant current conversion device, the signal processing module 11 can at least determine the voltage value included in the output signal Sout based on the second detection signal Sdet2. When it is determined that the voltage value increases or decreases, the signal processing module 11 outputs a third control signal to the electric energy conversion device, so that the electric energy conversion device correspondingly reduces or increases the current value included in the output signal Sout, and further maintains the product of the voltage value and the current value at a constant value.

[0111] In some examples, for example, in an example where the electric energy conversion device is configured as a constant voltage conversion device, the signal processing module 11 can at least determine the current value contained in the output signal Sout based on the first detection signal Sdet1. When it is determined that the current value increases or decreases, the signal processing module 11 outputs a third control signal to the electric energy conversion device, so that the electric energy conversion device correspondingly reduces or increases the voltage value contained in the output signal Sout, and further maintains the product of the voltage value and the current value at a constant value.

[0112] Furthermore, the signal processing module described in any of the above embodiments may also be configured to control the power conversion device to cease operation when, based on the detection signal provided by the detection module, the output signal exceeds a preset upper limit. Specifically, in any of the above embodiments where the detection signal includes a first detection signal, the signal processing module may determine the current value contained in the output signal based on the first detection signal. The specific principles are described above and will not be elaborated upon here. Here, the preset upper limit is set as a current value upper limit, and the signal processing module further determines whether the current value exceeds the current value upper limit. If so, the power conversion device is controlled to cease operation, thereby providing overcurrent protection.

[0113] In any embodiment in which the above-mentioned detection signal includes a second detection signal, the signal processing module can determine the voltage value contained in the output signal based on the second detection signal. For the specific principle, please refer to the above-mentioned related description and will not be repeated here. Here, the preset upper limit is set to a voltage value upper limit, and the signal processing module further determines whether the voltage value exceeds the voltage value upper limit. If it exceeds, the power conversion device is controlled to stop working, thereby playing the role of overvoltage protection.

[0114] In any embodiment in which the above-mentioned detection signal includes a first detection signal and a second detection signal, the signal processing module can determine the current value contained in the output signal based on the first detection signal, and determine the voltage value contained in the output signal based on the second detection signal. For the specific principle, please refer to the above-mentioned related description, which will not be repeated here. Here, the preset upper limit includes a current value upper limit and a voltage value upper limit. The signal processing module further controls the electric energy conversion device to stop working when it is judged that the current value exceeds the current value upper limit, and controls the electric energy conversion device to stop working when it is judged that the voltage value exceeds the voltage value upper limit, thereby playing the role of overcurrent protection.

[0115] In some embodiments, the signal processing module described in any of the above embodiments may be configured to include a memory and a processor, wherein the memory may be used to store the first association relationship, the second association relationship, the resistance parameters related to the circuit, the logic for performing calculations, etc., as described in the above examples, and the processor may call the contents stored in the memory to perform the corresponding calculations to generate the control signal. For example, the memory may include random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc. The processor may include one or more general-purpose microprocessors, one or more application-specific processors (ASICs), one or more digital signal processors (DSPs), one or more field programmable gate arrays (FPGAs), or any combination thereof.

[0116] Furthermore, the electric energy conversion device regulates its output based on the control signal provided by the signal processing module. Because the detection module that provides the detection signal to the signal processing module in any of the above-described embodiments of the present application is directly coupled to the output terminal of the electric energy conversion device for detection, the signal processing module can accurately determine whether the output signal meets preset requirements. The control signal provided to the electric energy conversion device can further enable the electric energy conversion device to make timely adjustments so that the output signal meets preset requirements, such as controlling the deviation of at least one electrical characteristic in the output signal from the expected value corresponding to the electrical characteristic to be less than 3%, preferably, less than 1%.

[0117] In some embodiments, the present application further provides a power supply device for providing electrical energy to a load. For example, the load may be an LED lamp, which refers to a lamp comprising an LED module, including but not limited to flat panel lamps, pendant lamps, bulb lamps, and straight tube lamps. The power supply device can provide electrical energy to the LED module in the LED lamp to illuminate the LED module. The load may also be a smart terminal, such as a mobile phone, tablet computer, laptop computer, or smartwatch, and the power supply device can supply power to the smart terminal to enable the smart terminal to operate normally.

[0118] Please refer to FIG. 11 , which is a circuit block diagram of a power supply device in one embodiment of the present application. As shown in the figure, the power supply device 4 includes a rectifier module 40 , a filter module 41 , an electric energy conversion device 42 , and a control device 43 .

[0119] The rectifier module 40 receives an input signal Sin, rectifies the input signal Sin, and outputs a rectified signal. The input signal Sin can be set to an AC signal output by an external AC power supply, or a DC signal provided by an external / internal DC power supply. The external AC power supply can be, for example, an external power grid, and the AC signal it provides can be commercial power with a voltage range of 100-277V and a fluctuation range of 10% above and below, and a frequency of 50Hz or 60Hz. For example, the rectifier module 40 can be set to a circuit architecture using a half-wave rectifier circuit, a full-wave rectifier circuit, a bridge rectifier circuit, or a voltage doubler rectifier circuit.

[0120] The filter module 41 is coupled to the rectifier module 40 and is configured to filter the rectified signal before outputting it. For example, the filter module 41 can be configured to employ a capacitor filter circuit (C-type), an inductor filter circuit (L-type), a capacitor-inductor filter circuit (LC-type), or a π-type filter circuit (LCπ-type).

[0121] The power conversion device 42 is coupled to the filter module 41 and is used to perform energy conversion on the filtered signal to provide an output signal Sout. The output signal Sout can be used to power a load connected to the power supply device 4. In one embodiment, the power conversion device 42 may include a DC-DC converter, which performs energy conversion by regulating the on and off of a switch tube. For example, the DC-DC converter may include a control circuit, a switch circuit, and an energy conversion circuit, wherein the control circuit controls the switch circuit to be turned on or off so that the energy conversion circuit performs power conversion to output power suitable for the load demand.

[0122] The control device 43 is coupled to the output terminal of the power conversion device 42 and is configured to output a control signal Scon to the power conversion device 42 based on the output signal, so that the power conversion device adjusts the power conversion based on the control signal Scon so that the output signal Sout thereof meets a preset requirement. The preset requirement corresponds to the load demand and can be set to an expected value corresponding to at least one electrical characteristic, such as voltage, current, and power. The output signal meeting the preset requirement means that at least one electrical characteristic of the output signal is consistent with the expected value corresponding to the preset requirement. For example, in the example where the preset requirement is set to the expected value Ie corresponding to the current characteristic (i.e., the load demand is constant current power supply), the output signal meets the preset requirement, which means that the current value contained in the output signal is consistent with the expected value Ie; in the example where the preset requirement is set to the expected value Ve corresponding to the voltage characteristic (i.e., the load demand is constant voltage power supply), the output signal meets the preset requirement, which means that the voltage value contained in the output signal is consistent with the expected value Ve; in the example where the preset requirement is set to the expected value Pe corresponding to the power characteristic (i.e., the load demand is constant power power supply), the output signal meets the preset requirement, which means that the power value contained in the output signal is consistent with the expected value Pe.

[0123] In one embodiment, the control device is configured as the control device disclosed in any of the aforementioned embodiments of the present application (such as any of the embodiments in Figures 1 to 10 and their related descriptions), which can output a control signal to the electric energy conversion device when the output signal does not meet the preset requirements, so that the electric energy conversion device adjusts its output signal based on the control signal. The connection method between the control device and the electric energy conversion device, the circuit structure of the output control signal and the working principle, etc. can refer to the aforementioned Figures 1 to 10 and their related descriptions, and will not be repeated here. It should be noted that in Figure 11, the control device 43 is coupled to the two output ends of the electric energy conversion device 42 respectively, which only means that the control device and the output ends of the electric energy conversion device 42 have a coupling relationship, and does not mean that the control device 43 must be connected to the two output ends of the electric energy conversion device 42. Those skilled in the art can couple the control device 42 to the output end of the electric energy conversion device 42 in a matching manner according to the aforementioned descriptions of Figures 1 to 10.

[0124] In some embodiments, the present application further provides an LED lamp, which includes an LED module and a power supply device. The power supply device is coupled to the LED module for supplying power to the LED module. For example, the LED lamp can be configured as a flat panel lamp, a chandelier, a bulb lamp, a straight tube lamp, etc., and the present application does not limit the form of the LED lamp. In one embodiment, the power supply device is configured as the power supply device disclosed in any of the aforementioned embodiments of the present application, which can output an output signal that meets preset requirements. The circuit structure and working principle of the power supply device can be found in the aforementioned Figures 1 to 11 and the related descriptions, and will not be repeated here.

[0125] In summary, the present application provides a control device and a power supply device and LED lamp using the same. By setting a detection module in the control device coupled to the output end of the electric energy conversion device, the control device can directly detect the output signal provided by the electric energy conversion device to the load, and a signal processing module coupled to the detection module is set. The signal processing module can make a judgment based on the detection signal output by the detection module and output a control signal, which serves as the basis for regulating the electric energy conversion device. In this way, the regulation accuracy of the electric energy conversion device is greatly improved, so that the output of the electric energy conversion device can meet the accuracy requirements.

[0126] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical concepts disclosed in this application shall be covered by the claims of this application.

Claims

1. A control device, applied to an electric energy conversion device, characterized in that: include: A detection module, coupled to the output end of the electric energy conversion device, and sampling the output signal of the output end to generate an output detection signal; wherein the output end is used to couple to a load to supply power to the load through the output signal; as well as The signal processing module is coupled to the detection module and is used to output a control signal to the power conversion device when it is determined according to the detection signal that the output signal does not meet the preset requirements, so that the power conversion device adjusts its output signal based on the control signal.

2. The control device according to claim 1, characterized in that: The detection module comprises: a sampling component coupled to the output end in series with the load; and A first detection circuit is coupled to the two ends of the sampling component, and is used to output a first detection signal to the signal processing module based on the voltage difference between the two ends of the sampling component; wherein the first detection signal has a first correlation relationship with the voltage difference, so that the signal processing module can determine the current value contained in the output signal based on the first detection signal.

3. The control device according to claim 2, characterized in that: The first detection circuit includes a first differential circuit coupled to two ends of the sampling component and configured to output the first detection signal based on a voltage difference between the two ends of the sampling component.

4. The control device according to claim 3, characterized in that: The first differential circuit includes a voltage dividing circuit for dividing voltage in the first differential circuit.

5. The control device according to claim 2, characterized in that: The signal processing module is used to determine the current value included in the output signal according to the first detection signal, the first association relationship, and the resistance value of the sampling component, and output a first control signal when the current value does not meet a preset requirement.

6. The control device according to claim 2, characterized in that: The detection module includes a second detection circuit, which is coupled to the output end of the electric energy conversion device and is used to output a second detection signal based on the output signal; wherein the second detection signal has a second correlation relationship with the output signal, so that the signal processing module can determine the voltage value contained in the output signal based on the second detection signal.

7. The control device according to claim 6, characterized in that: The second detection circuit includes a second differential circuit coupled to the output terminal and configured to output the second detection signal based on the output signal.

8. The control device according to claim 7, characterized in that: The second differential circuit includes a voltage dividing circuit for dividing voltage in the second differential circuit.

9. The control device according to claim 6, characterized in that: The signal processing module is used to determine the voltage value included in the output signal according to the second detection signal and the second association relationship, and output a second control signal when the voltage value does not meet the preset requirement.

10. The control device according to claim 1, characterized in that: The detection module comprises: A sampling component is coupled to the output end in a manner of being serially connected to the load; a first detection circuit, coupled to both ends of the sampling component, for outputting a first detection signal to the signal processing module based on a voltage difference between both ends of the sampling component; wherein the first detection signal has a first correlation relationship with the voltage difference, so that the signal processing module can determine a current value included in the output signal based on the first detection signal; A second detection circuit is coupled to the output end of the electric energy conversion device, and is used to output a second detection signal based on the output signal; wherein the second detection signal has a second correlation relationship with the output signal, so that the signal processing module can determine the voltage value contained in the output signal based on the second detection signal.

11. The control device according to claim 10, characterized in that: The signal processing module is used to output a third control signal when it is determined based on the first detection signal and the second detection signal that the power value included in the output signal does not meet the preset requirement.

12. The control device according to claim 1, characterized in that: The signal processing module is also used to control the electric energy conversion device to stop working when it is determined that the output signal exceeds a preset upper limit based on the detection signal provided by the detection module.

13. A power supply device, characterized in that: include: A rectifier module, used for rectifying the received input signal to output a rectified signal; A filtering module, coupled to the rectifying module, configured to filter the rectified signal and then output it; An electric energy conversion device, coupled to the filtering module, for performing energy conversion on the filtered signal to provide an output signal; The control device as described in any one of claims 1 to 12 is coupled to the output end of the electric energy conversion device, and is used to output a control signal based on the output signal, so that the electric energy conversion device adjusts its output signal to meet preset requirements based on the control signal.

14. An LED lamp, characterized in that: include: LED modules; The power supply device as claimed in claim 13, coupled to the LED module, is used to supply power to the LED module.

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