Start-up circuit and control method thereof

Abstract

The application relates to a starting circuit and a control method thereof. The circuit comprises a power supply circuit for outputting a power supply voltage; a power supply control circuit electrically connected with the power supply circuit; a power supply conversion circuit receiving the power supply voltage and outputting a first output voltage and a second output voltage through a first secondary winding and a second secondary winding respectively; an intelligent control module receiving the second output voltage and outputting a judgment signal according to an instruction signal; a dummy load electrically connected with the first secondary winding; a dummy load control circuit electrically connected with the dummy load, the dummy load control circuit receiving the judgment signal to control the on-off of the dummy load; and a voltage negative feedback circuit detecting the first output voltage and feeding back to the power supply control circuit to control the first output voltage and the second output voltage. The on-off of the dummy load is controlled by the dummy load control circuit, and the first output voltage is detected by the voltage negative feedback circuit for feedback, so that the purpose of standby low power consumption and fast starting is achieved.

Description

Technical Field

[0001] This invention belongs to the field of power supply technology, and particularly relates to a startup circuit and its control method. Background Technology

[0002] With the emergence and development of smart products, the requirement for rapid startup is becoming increasingly stringent. In existing technologies, while smart products can achieve faster startup speeds, they also generate significant standby power consumption.

[0003] Currently, no effective solution has been proposed to address the challenge of balancing high response and low power consumption in related technologies. Summary of the Invention

[0004] To address the above problems, the present invention provides a startup circuit and its control method.

[0005] In a first aspect, embodiments of this application propose a startup circuit, comprising:

[0006] A power supply circuit, used to output a power supply voltage;

[0007] The power supply control circuit is electrically connected to the power supply circuit.

[0008] The power supply conversion circuit receives the power supply voltage and outputs the first output voltage and the second output voltage through the first stage winding and the second stage winding, respectively;

[0009] The intelligent control module receives the second output voltage and outputs a judgment signal according to a command signal;

[0010] A dummy load is electrically connected to the primary winding.

[0011] The dummy load control circuit is electrically connected to the dummy load. The dummy load control circuit receives a judgment signal and controls the on / off state of the dummy load.

[0012] The voltage negative feedback circuit detects the first output voltage and feeds it back to the power supply control circuit to control the first output voltage and the second output voltage.

[0013] In some embodiments, the dummy load control circuit includes a control element, a first port of which is connected to the judgment signal output terminal of the intelligent control module, and a second port of which is connected to the primary winding. The control element is switched on and off according to the judgment signal received at the first port to control the switching on and off of the dummy load.

[0014] In some embodiments, the control element is configured as a field-effect transistor, a transistor, or a silicon controlled rectifier.

[0015] In some embodiments, when the control element is a transistor, the first port is set as the base, the second port is set as the collector, the base is connected to the judgment signal output terminal of the intelligent control module through the second resistor, the collector is connected to the primary winding through the first resistor, the emitter of the transistor is grounded, and a third resistor is connected in parallel between the base and the emitter.

[0016] In some embodiments, the primary winding is also electrically connected to a first energy storage capacitor assembly for supplying power to the load.

[0017] In some embodiments, the smart control module is configured as a Bluetooth module or a Wi-Fi module.

[0018] In some embodiments, a second energy storage capacitor assembly is also included, connected in parallel with the secondary winding, for powering the intelligent control module.

[0019] In some embodiments, the voltage negative feedback circuit is configured as an optocoupler feedback circuit, the output of which is connected to the primary winding and the output of which is connected to the voltage input of the power supply control circuit.

[0020] In some embodiments, the power supply circuit is configured as an LLC half-bridge resonant circuit.

[0021] In some embodiments, a voltage regulating circuit is also included, the input of which is electrically connected to the secondary winding, and the output of which is electrically connected to the input of the intelligent control module.

[0022] Secondly, this application also proposes a startup control method, which uses the startup circuit of the first aspect, and includes the following steps:

[0023] The power supply step is used to output a power supply voltage through a power supply circuit, and output a first output voltage and a second output voltage through a power supply conversion circuit respectively.

[0024] The signal output step is used to receive the second output voltage through an intelligent control module and output a judgment signal based on a sampled signal;

[0025] The circuit control step is used to receive and control the on / off state of the dummy load according to the judgment signal through a dummy load control circuit, wherein the dummy load receives a first output voltage;

[0026] The voltage feedback step is used to identify the first output voltage through a voltage negative feedback circuit and detect the on / off status of the dummy load accordingly, and feed it back to the power supply control circuit to control the first output voltage and the second output voltage to achieve rapid start-up.

[0027] In some embodiments, when the circuit is started, the judgment signal output by the intelligent control module is high, the dummy load control circuit is turned on, the dummy load is connected, the voltage negative feedback circuit detects the decrease in the first output voltage and feeds it back to the power supply control circuit, the first output voltage and the second output voltage increase rapidly, realizing rapid circuit start-up; when entering standby mode, the judgment signal output by the intelligent control module is low, the dummy load control circuit is turned off, the dummy load is disconnected, realizing low-power standby.

[0028] In some embodiments, when the circuit is started, the first output voltage increases rapidly and accelerates the charging of a first energy storage capacitor component; after startup, the first energy storage capacitor component continuously supplies power to the load of the subsequent stage.

[0029] In some embodiments, when the circuit is started, the second output voltage increases rapidly and accelerates the charging of a second energy storage capacitor assembly; after startup, the second energy storage capacitor assembly continuously supplies power to the subsequent intelligent control module.

[0030] Thirdly, embodiments of this application propose an intelligent product, characterized in that it includes the startup circuit described in the first aspect.

[0031] The startup circuit can also be connected to an external WiFi smart gateway, APP, or Bluetooth remote control, all of which are electrically connected to the smart control module.

[0032] Fourthly, embodiments of this application provide a power controller including the startup circuit described in the first aspect.

[0033] Fifthly, embodiments of this application provide a lamp, including the starting circuit and lighting components described in the first aspect.

[0034] In summary, this application proposes a startup circuit and its control method. The connection of the dummy load is controlled by a dummy load control circuit, and the first output voltage is detected and fed back by a voltage negative feedback circuit to achieve rapid startup of the circuit. At the same time, in the standby state, the dummy load control circuit controls the dummy load to disconnect, realizing low-power standby. This effectively solves the coordination problem between high response and low power consumption in the prior art, achieving both rapid startup and low-power standby.

[0035] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the principle of an AC-DC converter based on secondary side feedback in the prior art. Figure 1 ;

[0038] Figure 2 This is a schematic diagram of the principle of an AC-DC converter based on secondary side feedback in the prior art. Figure 2 ;

[0039] Figure 3 This is a schematic diagram of the principle of an AC-DC converter based on secondary side feedback in the prior art. Figure 3 ;

[0040] Figure 4 This is a structural framework diagram of the startup circuit in an embodiment of this application;

[0041] Figure 5 This is a circuit diagram illustrating the principle structure of a dummy load control circuit.

[0042] Figure 6 This is a circuit diagram illustrating the principle structure of a voltage negative feedback circuit.

[0043] Figure 7 This is a circuit structure diagram of the startup circuit in an embodiment of this application;

[0044] Figure 8 The timing diagram shows the mains power, the second output voltage, and the judgment signal.

[0045] Figure 9 A flowchart for the startup control method;

[0046] The attached figures are labeled as follows:

[0047] Power supply control circuit 1; power supply conversion circuit 2; primary winding 21;

[0048] Secondary winding 22; Intelligent control module 3; Dummy load 4;

[0049] 5. Dummy load control circuit; 6. Voltage negative feedback circuit; 9. Power supply circuit;

[0050] Transistor Q1; First energy storage capacitor assembly EC1; Second energy storage capacitor assembly EC2; Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0052] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0053] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0054] The illustrative embodiments and descriptions of the present invention are used to explain the invention, but are not intended to limit the invention. Furthermore, elements / components using the same or similar reference numerals in the drawings and embodiments are used to represent the same or similar parts.

[0055] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to such processes, methods, products, or apparatus. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” in this application refers to two or more; “multiple groups” as used herein includes “two groups” and “more than two groups.” The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of objects.

[0056] The terms "approximately," "about," etc., used herein are intended to modify any quantity or error that may vary slightly, but these slight variations or errors do not change the essence of the quantity or error. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in others, 5% in still others, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0057] Certain terms used to describe this application will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the application.

[0058] In existing technologies, there are generally two methods in the application circuits of AC-CDC converters based on secondary-side feedback: 1. As Figure 1 As shown, a single winding outputs CV1 (typically a higher voltage, such as 42V or higher), and then CV1 is stepped down to CV2 (typically 3.3V or 5V, to power Wi-Fi or other smart modules). The advantage of this solution is easy startup and stable power supply; however, the disadvantage is high standby power consumption. Stepping down from 42V to 5V or 3.3V is relatively inefficient, resulting in high losses and hindering the achievement of low standby power consumption. 2. Another approach is... Figure 2As shown, the same transformer has two windings, CV1 and CV2. CV1 is the main output and needs to be turned off in standby mode; CV2 is the auxiliary output, which powers the Wi-Fi in standby mode. The advantage of this solution is low standby power consumption, but the disadvantage is that it cannot start up quickly under light load / standby conditions.

[0059] In the aforementioned secondary-side feedback ACDC converter, secondary-side feedback refers to the detection method in isolated power supplies where the secondary side feeds back to the primary side, which is a commonly used topology in switching power supplies.

[0060] Based on the above, it is also possible to... Figure 3 As shown, adding a dummy load directly speeds up the startup process, but the standby power consumption remains high, failing to resolve the issue between startup speed and power consumption.

[0061] Based on this, the present invention proposes a startup circuit, a startup control method, an intelligent product, a power controller, and a lamp. The startup circuit can achieve rapid startup, and at the same time, in the standby state, it controls the dummy load to disconnect, thereby achieving the purpose of reducing standby power consumption.

[0062] This application provides a startup circuit, whereby the terms "module," "unit," "subunit," etc., as used below, can refer to a combination of software and / or hardware that performs a predetermined function. Although the system described in the following embodiments is preferably implemented in hardware, software implementation, or a combination of software and hardware, is also possible and contemplated.

[0063] Figure 4 This is a structural framework diagram of the startup circuit in an embodiment of this application, such as... Figure 4 As shown, the startup circuit specifically includes a power supply circuit 9, a power supply control circuit 1, a power supply conversion circuit 2, an intelligent control module 3, a dummy load 4, a dummy load control circuit 5, and a voltage negative feedback circuit 6, wherein:

[0064] Power supply circuit 9 is used to output a power supply voltage;

[0065] The power supply control circuit 1 is electrically connected to the power supply circuit 9 and is used to control the power supply voltage;

[0066] The power supply conversion circuit 2 receives the power supply voltage and outputs the first output voltage CV1 and the second output voltage CV2 through the first stage winding 21 and the second stage winding 22, respectively.

[0067] The intelligent control module 3 receives the second output voltage CV2 and outputs a judgment signal according to a command signal;

[0068] The dummy load 4 is electrically connected to the primary winding 21;

[0069] The dummy load control circuit 5 is electrically connected to the dummy load 4. The dummy load control circuit 5 receives a judgment signal and controls the on / off state of the dummy load 4.

[0070] The voltage negative feedback circuit 6 detects the first output voltage and feeds it back to the power supply control circuit 1 to control the first output voltage CV1 and the second output voltage CV2.

[0071] The aforementioned acquired signals refer to the signals collected by the intelligent control module 3 through data input and output communication with the external antenna UART. The intelligent control module 3 can distinguish and support different control states based on the different acquired signals.

[0072] It should be noted that the power conversion circuit 2 can be set as an isolation transformer.

[0073] In practical applications, the detection point of the voltage negative feedback circuit 6 is located at the front end of the connection point where the dummy load 4 receives the first output voltage CN1. The aforementioned front end is the end close to the first primary winding 21, so that the voltage negative feedback circuit 6 can detect the change in the first output voltage, but its connection will not be affected by the working state of the dummy load 4.

[0074] In some embodiments, the dummy load control circuit 5 includes a control element. The first port of the control element is connected to the judgment signal output terminal of the intelligent control module 3, and the second port of the control element is connected to the primary winding 21. The control element is switched on and off according to the judgment signal received at the first port to control the switching on and off of the dummy load 4.

[0075] In some embodiments, the control element is configured as a field-effect transistor, a transistor, or a silicon controlled rectifier.

[0076] In some of these embodiments, Figure 5 The schematic diagram of the dummy load control circuit 5 is shown below. Figure 5 As shown, when the control element is set to transistor Q1, the first port is set as the base, the second port is set as the collector, the base is connected to the judgment signal output terminal of the intelligent control module 3 through the second resistor R2, the collector is connected to the first primary winding 21 through the first resistor R1, the emitter of transistor Q1 is grounded, and a third resistor R3 is connected in parallel between the base and the emitter.

[0077] In some embodiments, the primary winding 21 is also electrically connected to a first energy storage capacitor assembly EC1 for supplying power to the load.

[0078] In some embodiments, the smart control module 3 is configured as a Bluetooth module or a Wi-Fi module.

[0079] In practical applications, the intelligent control module 3 can be configured as a high-power control module such as Wi-Fi or Bluetooth.

[0080] In some embodiments, a second energy storage capacitor assembly EC2 is also included, which is connected in parallel with the second stage winding 22 of the power conversion circuit 2 for power supply to the intelligent control module 1.

[0081] Since the first output voltage CV1 has a voltage negative feedback circuit 6, it can ensure that the first output voltage CV1 has a stable output voltage under light and heavy load conditions. However, the second output voltage CV2 has no feedback. Although the first output voltage CV1 and the second output voltage CV2 are coupled from the two windings of the same transformer, the voltage will drop when the load is heavy. Therefore, it is easy to cause the intelligent control module to lose power, fail to work, or repeatedly restart. The purpose of setting the second energy storage capacitor component EC2 is to supply power to the intelligent control module 3 and prevent the intelligent control module 3 from experiencing the above phenomena.

[0082] In practical applications, the first energy storage capacitor component 21 and the second energy storage capacitor component 22 can be configured as multiple parallel capacitors, with the first energy storage capacitor component 21 and the second energy storage capacitor component 22 serving as energy storage capacitors for the first output voltage CV1 and the second output voltage CV2, respectively.

[0083] During startup, the dummy load 4 serves the following purpose: at the instant of startup, the voltage negative feedback circuit 6 recognizes that there is a load, and the power supply circuit 9 enhances the power output, quickly charging the second energy storage capacitor EC2. This ensures sufficient power for the subsequent intelligent control module 3, guaranteeing rapid startup and continuous stable system operation. If there is no dummy load, the voltage negative feedback circuit 6 recognizes that there is no load, reducing the PWM duty cycle (or lowering the PFM modulation frequency) of the power supply circuit 9. This voltage is then coupled through the primary winding (4-6) of the transformer to the first stage winding (7-9) and the second stage winding (10-11), resulting in a decrease in the first output voltage CV1 and the second output voltage CV2. However, at this time, the second energy storage capacitor EC2 of the second output voltage CV2 path is not fully charged (the lower the voltage, the slower the electrolytic charging speed) and the energy is drawn away by the intelligent control module 3. The second energy storage capacitor EC2 is momentarily short of energy and the voltage drops, causing the intelligent control module 3 to restart or crash. The above PWM refers to pulse width modulation, and PFM refers to pulse frequency modulation.

[0084] It should be noted that the three windings of the transformer are tightly coupled, and the two secondary windings change in proportion to the primary winding.

[0085] In some of these embodiments, such as Figure 6As shown, the voltage negative feedback circuit 6 is configured as an optocoupler feedback circuit. The output terminal of the optocoupler feedback circuit is connected to the primary winding 21, and the output terminal of the optocoupler feedback circuit is connected to the voltage input terminal of the power supply control circuit 1.

[0086] For details on the specific circuit connection method, please refer to Figure 6 The working principle of the optocoupler feedback circuit is as follows: the input voltage of the optocoupler feedback circuit is the first output voltage. When the first output voltage CV1 increases, the primary current I... AK Increase, output current I CE When the voltage at pin 4 increases, the duty cycle decreases, and the output voltage decreases; conversely, when the first output voltage CV1 decreases, the adjustment process is similar.

[0087] In some embodiments, the power supply circuit 9 is configured as an LLC half-bridge resonant circuit.

[0088] In some embodiments, a voltage regulating circuit 7 is also included. The input terminal of the voltage regulating circuit 7 is electrically connected to the secondary winding 22, and the output terminal of the voltage regulating circuit 7 is electrically connected to the input terminal of the intelligent control module 3. This is done to improve the accuracy of the input voltage 3V3 of the intelligent control module 3.

[0089] like Figure 7 As shown, the voltage regulation circuit 7 includes a chip U2. Pin 4 of chip U2 is connected to the second output voltage, and pin 6 is connected to an external voltage through an inductor L3 connected in series. Resistors R24 and R25 are also connected in series between pin 6 and pin 3, and between pin 3 and pin 2, respectively.

[0090] When the startup circuit of this embodiment is working, the intelligent control module 3 receives the acquired signal and outputs a high-level judgment signal accordingly. The dummy load control circuit 5 receives the judgment signal and turns on, controlling the dummy load 4 to connect to the circuit and the primary winding 21. The voltage negative feedback circuit 6 detects the state of having a load and feeds it back to the power supply control circuit 1. The power supply control circuit 1 quickly increases the power supply output, and the first output voltage CV1 and the second output voltage CV2 increase, realizing rapid startup. When in standby mode, the intelligent control module 3 receives the acquired signal and outputs a low-level judgment signal accordingly. The dummy load control circuit 5 receives the judgment signal and turns off, controlling the dummy load 4 to disconnect, realizing low power consumption in standby mode.

[0091] In practical applications, the dummy load control circuit, in conjunction with specific software settings within the intelligent control module, controls the dummy load. The intelligent control module receives the acquired signals and outputs high / low level judgment signals based on the different acquired signals and the software settings.

[0092] Figure 7 This is a schematic block diagram of the startup circuit of a preferred embodiment of the present invention, as shown below. Figure 7As shown, the intelligent control module 3 in the above embodiment is specifically configured as an intelligent module U3. This circuit also includes a power supply control circuit 1, a power supply conversion circuit 2, a power supply circuit 9, a dummy load and its control circuit 8, a voltage negative feedback circuit 6, a step-down circuit 7, a first energy storage capacitor component EC1, and a second energy storage capacitor component EC2. Wherein:

[0093] The power supply control circuit 1 is specifically chip U1, and the power supply circuit 9 is set as an LLC half-bridge resonant circuit; the power supply conversion circuit 2 is set as a transformer with two secondary windings, namely the first secondary winding 21 and the second secondary winding 22; the dummy load and its control circuit 8 are specifically set as transistors Q1, R1, R2 and R3; the voltage negative feedback circuit 6 is set as an optocoupler feedback circuit, and the input terminal of the optocoupler feedback circuit is connected to the first secondary winding 21 to detect the first output voltage CV1 on it and feed it back to the power supply control circuit 1; the step-down circuit 7 is connected to the second secondary winding 22 of the power supply conversion circuit 2 and adjusts its output second output voltage CV2 to 3.3V to supply the intelligent module U3; the first energy storage capacitor EC1 and the second energy storage capacitor EC2 are respectively used as energy storage capacitors for the first output voltage CV1 and the second output voltage CV2, and are used to supply power to the downstream load or the intelligent module U3.

[0094] First, during the startup circuit, the pin of the intelligent module U3 sends a high-level judgment signal, which is set to the STB signal. The dummy load and its control circuit 8 operate, causing the voltage of the first output voltage CV1 to decrease. At this time, this dynamic information is transmitted to the FB detection input terminal of the power supply control circuit 1 through the voltage negative feedback circuit. After processing, the output of the power supply circuit 9 is enhanced (usually by increasing the PWM width or PFM frequency), thereby quickly increasing the voltage of the first output voltage CV1 and accelerating the charging speed of the first energy storage capacitor component EC1 to achieve the purpose of rapid startup. Second, after startup is completed, the dummy load control circuit 5 disconnects the dummy load 4, and the first energy storage capacitor component EC1 continues to supply power to the subsequent real load (such as LED driver and load module), ultimately achieving the purpose of low power consumption.

[0095] It should be noted that, in order to ensure that the dummy load starts working immediately upon startup and disconnects immediately upon standby, such as Figure 8 As shown, the STB signal output from the intelligent control module is synchronized with the second output voltage CV2. Here, "AC" refers to the 220Vac AC mains power.

[0096] by Figure 7Taking the pins of the intelligent module U3 as an example, the input pin 10 of U3 can be synchronized with the output pin 2. The STB signal is the voltage of the output pin 2, and 3V3 is the voltage of the input pin 10. The input pin 10 can be CV2 = 3V3, or it can be converted to 3V3 by a step-down circuit as in the embodiment of this application. This is done only to improve the accuracy of the 3V3 voltage.

[0097] This application also proposes a startup control method. Figure 9 This is a flowchart of the startup control method, which is used to implement the above embodiments and preferred embodiments. Details already described will not be repeated. Figure 9 As shown, the specific steps include:

[0098] The power supply step S1 is used to output a power supply voltage through a power supply circuit 9, and output a first output voltage and a second output voltage through a power supply conversion circuit 2 respectively.

[0099] The signal output step S2 is used to receive the second output voltage through an intelligent control module 3 and output a judgment signal based on a sampled signal;

[0100] Circuit control step S3 is used to receive and control the on / off state of dummy load 4 according to the judgment signal through a dummy load control circuit 5, wherein dummy load 4 receives the first output voltage.

[0101] The voltage feedback step S4 is used to identify the first output voltage through a voltage negative feedback circuit 6 and detect the on / off status of the dummy load 4 accordingly, and feed it back to the power supply control circuit 1 to control the first output voltage and the second output voltage to achieve rapid start-up.

[0102] Through the above steps, the intelligent control module 3 controls the connection of the dummy load control circuit, thereby controlling the connection of the dummy load. Combined with the voltage negative feedback circuit, the output voltage of the power supply circuit 9 is increased, thereby achieving rapid circuit startup. At the same time, when in standby mode, the intelligent control module controls the dummy load to disconnect by controlling the cut-off of the dummy load control circuit, thereby achieving low-power standby.

[0103] It should be noted that the aforementioned intelligent control module 3 can be a Wi-Fi intelligent module or a Bluetooth intelligent module, etc.

[0104] In some embodiments, when the circuit is started, the judgment signal output by the intelligent control module 3 is high, the dummy load control circuit 5 is turned on, the dummy load 4 is connected, the voltage negative feedback circuit 6 detects the decrease in the first output voltage and feeds it back to the power supply control circuit 1, the first output voltage and the second output voltage increase rapidly, realizing the circuit start-up quickly; when entering the standby mode, the judgment signal output by the intelligent control module 3 is low, the dummy load control circuit 5 is turned off, the dummy load is disconnected, realizing low power standby.

[0105] In the above steps, the dummy load 4 is switched on and off via the dummy load control circuit 5 according to the judgment signal. By adjusting the working state of the dummy load 4, the circuit can achieve fast start-up and low-power standby.

[0106] In some embodiments, when the circuit is started, the first output voltage increases rapidly and accelerates the charging of a first energy storage capacitor component EC1; after startup, the first energy storage capacitor component EC1 continuously supplies power to the load of the subsequent stage.

[0107] In some embodiments, when the circuit is started, the second output voltage increases rapidly and accelerates the charging of a second energy storage capacitor component EC2; after startup, the second energy storage capacitor component EC2 continuously supplies power to the subsequent intelligent control module 3.

[0108] This application also proposes an intelligent product, including the above-mentioned startup circuit. The startup circuit can also be connected to an external WiFi smart gateway, APP or Bluetooth remote control, all of which are electrically connected to the intelligent control module 3.

[0109] This application also proposes a power controller, including the aforementioned startup circuit. It should be noted that the power controller includes power switching power supply controllers, etc., but the present invention is not limited thereto.

[0110] This application also proposes a lamp, including the above-described starting circuit and lighting components.

[0111] It should be noted that the lighting fixtures include smart bulbs, smart downlights, and smart ceiling lights, especially bulbs and downlights connected in parallel, but the present invention is not limited thereto.

[0112] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A startup circuit, characterized in that, include: A power supply circuit, used to output a power supply voltage; A power supply control circuit is electrically connected to the power supply circuit; The power supply conversion circuit receives the power supply voltage and outputs a first output voltage and a second output voltage via a first stage winding and a second stage winding, respectively; wherein, the first stage winding is also electrically connected to a first energy storage capacitor assembly for supplying power to the load; The second energy storage capacitor assembly is connected in parallel with the second secondary winding and is used to power the intelligent control module. The intelligent control module receives the second output voltage and outputs a judgment signal according to a command signal; the intelligent control module includes a Bluetooth module or a Wi-Fi module, and the judgment signal is synchronized with the second output voltage; A dummy load is electrically connected to the primary winding. A dummy load control circuit is electrically connected to the dummy load, and the dummy load control circuit receives the judgment signal to control the on / off state of the dummy load; A voltage negative feedback circuit detects the first output voltage and feeds it back to the power supply control circuit to control the first output voltage and the second output voltage; When the circuit is started, the judgment signal output by the intelligent control module is high, the dummy load control circuit is turned on, the dummy load is connected, the voltage negative feedback circuit detects the decrease in the first output voltage and feeds it back to the power supply control circuit, the first output voltage and the second output voltage increase rapidly, realizing rapid circuit start-up; when entering standby mode, the judgment signal output by the intelligent control module is low, the dummy load control circuit is turned off, the dummy load is disconnected, realizing low-power standby.

2. The startup circuit according to claim 1, characterized in that, The dummy load control circuit includes a control element. The first port of the control element is connected to the judgment signal output terminal of the intelligent control module, and the second port of the control element is connected to the primary winding. The control element is switched on and off according to the judgment signal received at the first port, so as to control the switching on and off of the dummy load.

3. The startup circuit according to claim 2, characterized in that, The control element is configured as a field-effect transistor, a transistor, or a silicon controlled rectifier.

4. The starting circuit according to claim 2, characterized in that, When the control element is set as a transistor, the first port is set as the base, the second port is set as the collector, the base is connected to the judgment signal output terminal of the intelligent control module through a second resistor, the collector is connected to the primary winding through a first resistor, the emitter of the transistor is grounded, and a third resistor is connected in parallel between the base and the emitter.

5. The startup circuit according to claim 1, characterized in that, The voltage negative feedback circuit is configured as an optocoupler feedback circuit. The output terminal of the optocoupler feedback circuit is connected to the primary winding, and the output terminal of the optocoupler feedback circuit is connected to the input terminal of the power supply control circuit.

6. The startup circuit according to claim 1, characterized in that, The power supply circuit is configured as an LLC half-bridge resonant circuit.

7. The starting circuit according to claim 1, characterized in that, It also includes a voltage regulating circuit, the input terminal of which is electrically connected to the secondary winding, and the output terminal of which is electrically connected to the voltage input terminal of the intelligent control module.

8. A startup control method, using the startup circuit according to any one of claims 1-7, characterized in that, Includes the following steps: The power supply step is used to output a power supply voltage through a power supply circuit, and output a first output voltage and a second output voltage through a power supply conversion circuit respectively. The signal output step is used to receive the second output voltage through an intelligent control module and output a judgment signal according to a collection signal. The intelligent control module includes a Bluetooth module or a Wi-Fi module, and the judgment signal is synchronized with the second output voltage. The circuit control step is used to receive and control the on / off state of the dummy load according to the judgment signal through a dummy load control circuit, wherein the dummy load receives the first output voltage; The voltage feedback step is used to identify the first output voltage through a voltage negative feedback circuit and detect the on / off status of the dummy load accordingly, and feed it back to the power supply control circuit to control the first output voltage and the second output voltage to achieve rapid start-up; When the circuit is started, the first output voltage increases rapidly and accelerates the charging of a first energy storage capacitor component; after startup, the first energy storage capacitor component continuously supplies power to the load of the subsequent stage. When the circuit is started, the second output voltage increases rapidly and accelerates the charging of a second energy storage capacitor component; after startup, the second energy storage capacitor component continuously supplies power to the subsequent intelligent control module. When the circuit is started, the judgment signal output by the intelligent control module is high, the dummy load control circuit is turned on, the dummy load is connected, the voltage negative feedback circuit detects the decrease in the first output voltage and feeds it back to the power supply control circuit, the first output voltage and the second output voltage increase rapidly, realizing rapid circuit start-up; when entering standby mode, the judgment signal output by the intelligent control module is low, the dummy load control circuit is turned off, the dummy load is disconnected, realizing low-power standby.

9. A smart product, characterized in that, Including the startup circuit of any one of claims 1-7, The startup circuit is configured to connect to an external WiFi smart gateway, APP, or Bluetooth remote control, and all of these are electrically connected to the smart control module.

10. A power controller, characterized in that, The starting circuit includes any one of claims 1-7.

11. A lamp, characterized in that, It includes the starting circuit and lighting component according to any one of claims 1-7.

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