An electronic control board for a compact LED controller

Abstract

The invention relates to the technical field of LED controllers, in particular to an electric control board of a compact LED controller, wherein a transformer of a switching power supply circuit adopts a transformer structure, the switching power supply circuit is mounted on a PCB board and the transformer is arranged at the edge of the PCB board; the switching power supply circuit is used to generate a low-voltage regulating voltage to put itself in a low-power consumption mode after being powered on and self-powered and stable; and is also used to filter out common-mode interference generated by coupling between the primary side and the secondary side of the transformer; the PCB board is used to make the bonding surface of the solder and the pin firm while transferring the heat of the working heating components of the switching power supply circuit to a heat-absorbing medium; the transformer structure is used to separate the incoming line of the electromagnetic wire from the adjacent components and to separate the outgoing line of the electromagnetic wire from the adjacent components while separating the outgoing lines of two adjacent electromagnetic wires; thereby, the invention has the four characteristics of low power consumption, anti-interference, fast heat dissipation and firm pin welding.

Description

Technical Field

[0001] The invention relates to the technical field of LED controllers, in particular to an electric control board of a compact LED controller. Background Art

[0002] With the rapid development of LED lighting technology, the LED controller electronic control board is the core component of the LED lighting system, and its performance stability and reliability are crucial to the operation of the entire lighting system. However, in existing technologies, the design of the electronic control board of a compact LED controller often fails to simultaneously meet multiple requirements such as low power consumption, anti-interference, fast heat dissipation, and firm pin welding.

[0003] In terms of power consumption, traditional electronic control board designs often have unreasonable circuit design or improper component selection, which leads to mismatch between circuit performance and dimming current or redundant circuit performance, resulting in unnecessary energy loss. This not only increases circuit costs, but also causes overheating when applied to compact LED controllers.

[0004] In terms of anti-interference, since LED lighting systems usually work in a complex electromagnetic environment, the electronic control board is easily affected by external electromagnetic interference, and this interference is more intense in compact LED controllers, which can cause control signal distortion or system instability. The electronic control board design of existing LED controllers often does not have both low power consumption and anti-interference capabilities; and in a limited PCB board, the input and output lines of the transformer are easily adjacent to components and the output lines are adjacent to each other, causing electrical faults or short circuits.

[0005] In terms of heat dissipation and pin welding, since the PCB board space of the compact electronic control board is limited, components may be placed close to each other and components may be loaded on both sides of the PCB board. In particular, the LED controller is also provided with components (transformers, large capacitors, etc.) that generate relatively large amounts of heat during operation, which may easily lead to difficulties in heat dissipation of the electronic control board and difficulty or instability in pin welding (because component pins may be biased in various ways in order to save space). However, the PCB board layout and welding method of the electronic control board of the existing LED controller cannot simultaneously meet the requirements of fast heat dissipation and firm pin welding.

[0006] Therefore, developing a compact LED controller electronic control board that can simultaneously meet the requirements of low power consumption, anti-interference, fast heat dissipation and firm pin welding is of great significance for improving the stability and reliability of the overall performance of the LED lighting system. Summary of the invention

[0007] In view of the above-mentioned defects, the purpose of the present invention is to provide an electronic control board of a compact LED controller, which has the four characteristics of low power consumption, anti-interference, fast heat dissipation and firm pin welding.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] An electric control board of a compact LED controller comprises a switching power supply circuit, a PCB board and a transformer structure; the transformer T1 of the switching power supply circuit adopts the transformer structure, the switching power supply circuit is mounted on the PCB board and the transformer T1 is arranged at the edge of the PCB board;

[0010] The switching power supply circuit is used to generate a low-voltage regulation voltage to put itself in a low-power consumption mode after power-on and self-power supply stabilization; and is also used to filter out common-mode interference generated by coupling between the primary side and the secondary side of the transformer T1;

[0011] The PCB board is used to make the joint surface of the solder and the pin firm and at the same time conduct the heat of the working heating components of the switching power supply circuit to the heat absorbing medium;

[0012] The transformer structure is used to separate the incoming electromagnetic wire from adjacent components and to separate the outgoing electromagnetic wire from adjacent components while separating the outgoing electromagnetic wires of two adjacent electromagnetic wires.

[0013] Further, the switching power supply circuit includes a rectifier and filter unit, the transformer T1, a load receiving unit and a low-power and anti-interference PFC flyback module based on a gallium nitride chip; the output end of the rectifier and filter unit is electrically connected to the input end of the low-power and anti-interference PFC flyback module, the output end of the low-power and anti-interference PFC flyback module is electrically connected to the primary side of the transformer T1, the secondary side of the transformer T1 is electrically connected to the input end of the load receiving unit, and the anti-interference end of the low-power and anti-interference PFC flyback module is electrically connected to the anti-interference end of the load receiving unit;

[0014] The low-power and anti-interference PFC flyback module is used to generate the adjustment voltage to control the transformer T1 to output the dimming current to the load receiving unit when the rectification and filtering unit outputs the rectified current and the self-power supply is stable; the adjustment range of the adjustment voltage is zero to the preset maximum voltage; when the adjustment range of the adjustment voltage is zero to the low-power voltage value, the low-power and anti-interference PFC flyback module is in the low-power mode;

[0015] The low-power and anti-interference PFC flyback module is also used to filter out common-mode interference generated by the coupling between the primary side and the secondary side of the transformer T1.

[0016] Further, the low-power and anti-interference PFC flyback module includes a startup unit, a low-power PFC unit and a low-power flyback unit; the input end of the PFC unit is used as the input end of the low-power and anti-interference PFC flyback module, the output end of the flyback unit is used as the output end of the low-power and anti-interference PFC flyback module, and the anti-interference end of the PFC unit is used as the anti-interference end of the low-power and anti-interference PFC flyback module;

[0017] The output end of the PFC unit and the input end of the flyback unit are both electrically connected to the high-voltage startup pin HV, the power end of the PFC unit is electrically connected to the first end of the startup unit, the power end of the flyback unit is electrically connected to the second end of the startup unit, and the ground end of the PFC unit, the ground end of the startup unit and the ground end of the flyback unit are all grounded;

[0018] The startup unit is used to first supply power to start the flyback unit after the rectifier filter circuit outputs the rectified current, and then delay the power supply to start the PFC unit; when the PFC unit is started, the PFC unit supplies power to the flyback unit;

[0019] When the PFC unit and the flyback unit are both started, the flyback unit generates the regulation voltage;

[0020] The PFC unit and the flyback unit both use gallium nitride chips;

[0021] The PFC unit is used to filter out common-mode interference generated by coupling between the primary side and the secondary side of the transformer T1.

[0022] Further, the PFC unit includes a capacitor EC1, a capacitor CB1, a capacitor C2, a capacitor C3, a capacitor C6, a resistor R9, a resistor R29, a resistor R30, a resistor R4, a resistor R18, a resistor R19, a resistor R20, a resistor R2, a resistor R6, a resistor R5, a resistor R3, a resistor R8, an inductor L2, a diode D1, a diode D2, a gallium nitride PFC chip U1 and a first anti-interference circuit; one end and the other end of the capacitor CB1 are both used as the input end of the PFC unit, the positive electrode of the capacitor EC1 is used as the output end of the PFC unit, the negative electrode of the capacitor EC1 is used as the ground end of the PFC unit, the VDD end of the gallium nitride PFC chip U1 is used as the power supply end of the PFC unit, and the first end of the first anti-interference circuit is used as the anti-interference end of the PFC unit;

[0023] One end of the capacitor CB1, one end of the resistor R9, one end of the inductor L2, the anode of the diode D1, and one end of the capacitor C2 are all electrically connected to the second end of the first anti-interference circuit, the other end of the capacitor C2, the cathode of the diode D1, the cathode of the diode D2, and one end of the resistor R3 are all electrically connected to the positive electrode of the capacitor EC1, the other end of the resistor R9 is electrically connected to one end of the resistor R29, the other end of the resistor R29 is electrically connected to one end of the resistor R30, the other end of the resistor R30, one end of the capacitor C3, and one end of the resistor R4 are all electrically connected to the VAC end of the gallium nitride PFC chip U1, the other end of the inductor L2, the cathode of the diode D1, and one end of the resistor R3 are all electrically connected to the positive electrode of the capacitor EC1, the other end of the resistor R9 is electrically connected to one end of the resistor R29, the other end of the resistor R29 is electrically connected to one end of the resistor R30, the other end of the resistor R30, one end of the capacitor C3, and one end of the resistor R4 are all electrically connected to the VAC end of the gallium nitride PFC chip U1, the other end of the inductor L2, the cathode of the diode D2, and one end of the resistor R3 are all electrically connected to the positive electrode of the capacitor EC1, the other end of the resistor R9 is electrically connected to one end of the resistor R29, the other end of the resistor R29 is electrically connected to one end of the resistor R30 The anode of the diode D2 is electrically connected to the DRAIN end of the gallium nitride PFC chip U1, the other end of the resistor R3 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to one end of the resistor R5, the other end of the resistor R5, one end of the resistor R2, one end of the resistor R6, and one end of the capacitor C6 are all electrically connected to the INV end of the gallium nitride PFC chip U1, the other end of the resistor R2, the other end of the resistor R6, the other end of the capacitor C6, the GND end of the gallium nitride PFC chip U1, the other end of the resistor R4, the other end of the capacitor C3, and the other end of the capacitor CB1 are all electrically connected to the negative electrode of the capacitor EC1;

[0024] The flyback unit includes a capacitor C11, a capacitor C14, a resistor R7, a resistor R16, a resistor R13, a resistor R14, a resistor R15, a resistor R21, an inductor L3, a gallium nitride flyback chip U2 and a second anti-interference circuit; the VDD end of the gallium nitride flyback chip U2 is used as the power supply end of the flyback unit, the HV end of the gallium nitride flyback chip U2 is used as the input end of the flyback unit, one end of the inductor L3 and the first end of the second anti-interference circuit are both used as the output end of the flyback unit, and one end of the resistor R13 is used as the ground end of the flyback unit;

[0025] The HV end of the gallium nitride flyback chip U2 is electrically connected to the second end of the second anti-interference circuit, the DRAIN end of the gallium nitride flyback chip U2, the third end of the second anti-interference circuit, and the other end of the inductor L3 are all electrically connected to one end of the capacitor C14, the other end of the capacitor C14, one end of the resistor R21, one end of the resistor R15, one end of the resistor R14, and the other end of the resistor R13 are all electrically connected to the CS end of the gallium nitride flyback chip U2, the other end of the resistor R21, the other end of the resistor R15, and the other end of the resistor R14 are all electrically connected to one end of the resistor R13, the OVP end of the gallium nitride flyback chip U2, one end of the resistor R7, and one end of the resistor R16 are all electrically connected to one end of the capacitor C11, and the GND end of the gallium nitride flyback chip U2, the other end of the resistor R7, the other end of the resistor R16, and the other end of the capacitor C11 are all grounded;

[0026] The startup unit includes a capacitor C1, a capacitor C7, a capacitor C10 and a resistor R23; one end of the capacitor C7 is used as a first end of the startup unit, and one end of the capacitor C10 is used as a second end of the startup unit;

[0027] One end of the resistor R23 is electrically connected to one end of the capacitor C10, the other end of the resistor R23 and one end of the capacitor C1 are electrically connected to one end of the capacitor C7, and the other end of the capacitor C1, the other end of the capacitor C7 and the other end of the capacitor C10 are all grounded;

[0028] The second anti-interference circuit includes a capacitor C5, a resistor R10, a resistor R11, a resistor R12, a resistor R17 and a diode D3; one end of the capacitor C5 is used as a first end of the second anti-interference circuit, one end of the resistor R11 is used as a second end of the second anti-interference circuit, and an anode of the diode D3 is used as a third end of the second anti-interference circuit;

[0029] One end of the resistor R11 and one end of the resistor R12 are electrically connected to one end of the capacitor C5, the other end of the resistor R11, the other end of the resistor R12, one end of the resistor R10, and one end of the resistor R17 are electrically connected to the other end of the capacitor C5, and the other end of the resistor R10 and the other end of the resistor R17 are electrically connected to the cathode of the diode D3;

[0030] The first anti-interference circuit includes a capacitor CY1; one end of the capacitor CY1 is used as a first end of the first anti-interference circuit, and the other end of the capacitor CY1 is used as a second end of the first anti-interference circuit;

[0031] The load receiving unit includes a resistor R26, a resistor R27, a capacitor C9, a capacitor EC2, a diode D6 and a diode D7; the anode of the diode D7 and the cathode of the capacitor EC2 are both used as input terminals of the load receiving unit, the cathode of the diode D7 is used as an anti-interference terminal of the load receiving unit, and one end and the other end of the resistor R27 are used as output terminals of the load receiving unit;

[0032] The anode of the diode D6 and one end of the resistor R26 are electrically connected to the anode of the diode D7, the other end of the resistor R26 is electrically connected to one end of the capacitor C9, the other end of the capacitor C9, the cathode of the diode D6, the positive electrode of the capacitor EC2, and one end of the resistor R27 are electrically connected to the cathode of the diode D7, and the negative electrode of the capacitor EC2 and the other end of the resistor R27 are grounded.

[0033] Furthermore, the PCB board is provided with a heat dissipation solder structure and a strong adhesion solder structure; the pins of the working heat generating components adopt the heat dissipation solder structure, and the heat dissipation solder structure is used to conduct the heat of the working heat generating components to the heat absorbing medium;

[0034] The perforated pad or the patch pad adopts the strong adhesion solder structure, and the strong adhesion solder structure is used to make the bonding surface between the solder and the pin firm;

[0035] The heat dissipation solder structure and the strong adhesion solder structure can be provided at the same time.

[0036] Furthermore, the solder joints of the pins of the working heat generating components spread outward or in a directional manner to expand the solder surface to form the heat dissipation solder structure;

[0037] The heat dissipation solder structure comprises a solder point solder surface and a circuit solder surface; the solder point of the pin of the working heating component spreads and expands the solder surface to form the solder point solder surface, and the solder point solder surface directionally spreads and expands the solder surface along the circuit copper foil layer connected by the solder point of the pin of the working heating component to form the circuit solder surface;

[0038] The circuit solder surface includes at least one solder strip; the solder strip is connected to the solder surface of the solder point, and the solder strips are connected to each other.

[0039] Furthermore, the strong adhesion solder structure is a multi-angle solder surface or an asymmetric solder surface;

[0040] The solder point of the pin extends the solder surface toward the biased direction of the pin relative to the through-hole pad to form the asymmetric solder surface.

[0041] Furthermore, the transformer structure includes the transformer skeleton; the transformer skeleton includes a top cover, a winding post and a base; the top surface and the bottom surface of the winding post are fixedly connected to the bottom surface of the top cover and the top surface of the base respectively, and the outer wall of the winding post, the bottom surface of the top cover and the top surface of the base together form the winding groove;

[0042] The incoming line separation structure is provided on the rear side of the base, and the outgoing line separation structure is provided on the front side of the base.

[0043] Further, the outgoing wire separation structure is arranged on the left side of the base or the right side of the base relatively far away from the components, the outgoing wire separation structure is provided with at least one outgoing wire guide groove in parallel from left to right, and the front bottom surface of the outgoing wire separation structure is provided with outgoing wire electrical connection pins corresponding to the outgoing wire guide grooves one by one;

[0044] The outlet wire guide groove is used to lay the electromagnetic wire and guide the electromagnetic wire from the winding groove to the outlet wire electrical connection pin;

[0045] The outlet guide groove closest to the component is arranged at the bottom of the outlet separation structure, the front end of the outlet guide groove is shortened relative to the front end of the outlet separation structure to form an upward winding step, and the groove wall of one side of the outlet guide groove close to the component is extended downward to form a baffle;

[0046] Except for the outlet guide groove closest to the component, the rest of the outlet guide grooves are arranged on the top of the outlet separation structure.

[0047] Furthermore, the inlet wire separation structure is provided with a plurality of inlet wire guide grooves and teeth in parallel from left to right; the rear bottom surface of the inlet wire separation structure is provided with a plurality of inlet wire electrical connection pins;

[0048] The inlet guide groove is used to lay the electromagnetic wire and guide the electromagnetic wire from the inlet electrical connection pin to the winding groove.

[0049] The technical solution provided by the present invention may include the following beneficial effects: the transformer of the switching power supply circuit adopts a transformer structure, the switching power supply circuit is loaded on a PCB board and the transformer is arranged at the edge of the PCB board, so that the components of the electric control board close to the transformer are concentrated on one side of the transformer, and the transformer structure can be better utilized to separate the incoming line of the electromagnetic wire from the adjacent components and the outgoing line of the electromagnetic wire from the adjacent components, while separating the outgoing lines of two adjacent electromagnetic wires, so as to avoid electrical faults or short circuits caused by sticking to each other, and improve the anti-interference performance of the electric control board; at the same time, the characteristics of the PCB board are utilized to make the joint surface of the solder and the component pins more firm, and the joint surface is utilized to quickly conduct the heat of the working heat-generating components (generally chips, transformers and large capacitors, etc.) in the switching power supply circuit to the heat-absorbing medium (air, heat-conducting glue, etc.), The problem of firm and stable welding and heat dissipation of the compact electric control board is solved; on this basis, after the switching power supply circuit is powered on and the self-power supply is stable, the low-voltage adjustment voltage is used to put itself in a low-power mode to output dimming current, which can reduce the fluctuation of the dimming current while realizing dimming with low power consumption (compact LED controllers are generally adapted to LED lamps with relatively low voltage, so low-voltage dimming can meet the needs and reduce power consumption), reduce heat generation to a certain extent, and in the process filter out the common-mode interference generated by the coupling of the primary and secondary sides of the transformer, while improving the anti-interference ability of the switching power supply circuit; finally, with the cooperation of the switching power supply circuit, the PCB board and the transformer structure, the compact LED controller can have four characteristics of low power consumption, anti-interference, fast heat dissipation and firm pin welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural schematic diagram of an electric control board of a compact LED controller according to one embodiment of the present invention.

[0051] Figure 2 Yes Figure 1 The circuit schematic diagram of the switching power supply circuit is shown.

[0052] Figure 3 Yes Figure 1 The structural schematic diagram of the PCB board is shown.

[0053] Figure 4 Yes Figure 1 The structure of the transformer structure shown is schematic Figure 1 .

[0054] Figure 5 Yes Figure 1 The structure of the transformer structure shown is schematic Figure 2 .

[0055] Figure 6 Yes Figure 1 The structure of the transformer structure shown is schematic Figure 3 .

[0056] Among them: switching power supply circuit a, PCB board b, transformer structure c;

[0057] Rectification and filtering unit a4, transformer T1, low-power and anti-interference PFC flyback module a6, load receiving unit a5, startup unit a2, PFC unit a1, flyback unit a3, capacitor EC1, capacitor CB1, capacitor C2, capacitor C3, capacitor C6, resistor R9, resistor R29, resistor R30, resistor R4, resistor R18, resistor R19, resistor R20, resistor R2, resistor R6, resistor R5, resistor R3, resistor R8, inductor L2, diode D1, diode D2, gallium nitride PFC chip U1 , first anti-interference circuit a11, capacitor C11, capacitor C14, resistor R7, resistor R16, resistor R13, resistor R14, resistor R15, resistor R21, inductor L3, gallium nitride flyback chip U2, second anti-interference circuit a31, capacitor C1, capacitor C7, capacitor C10, resistor R23, capacitor C5, resistor R10, resistor R11, resistor R12, resistor R17, diode D3, capacitor CY1, resistor R26, resistor R27, capacitor C9, capacitor EC2, diode D6, diode D7;

[0058] Heat dissipation solder structure b1, strong adhesion solder structure b2, multi-angle solder surface b21, asymmetric solder surface b22, solder point solder surface b11, circuit solder surface b12, solder strip b121;

[0059] Transformer frame c1, winding groove c5, incoming wire separation structure c41, outgoing wire separation structure c42, top cover c2, winding column c3, base c4, outgoing wire guide groove c421, outgoing wire electrical connection pin c422, upward winding step c424, baffle c423, incoming wire guide groove c411, and tooth c412. DETAILED DESCRIPTION

[0060] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0061] In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0063] Combine the following Figures 1 to 6 , describing an electronic control board of a compact LED controller according to an embodiment of the present invention.

[0064] A compact LED controller electric control board, comprising a switching power supply circuit a, a PCB board b and a transformer structure c; the transformer T1 of the switching power supply circuit a adopts the transformer structure c, the switching power supply circuit a is mounted on the PCB board b and the transformer T1 is arranged at the edge of the PCB board b;

[0065] The switching power supply circuit a is used to generate a low voltage regulation voltage to put itself in a low power consumption mode after power-on and self-power supply stabilization; it is also used to filter out the common mode interference generated by the coupling between the primary side and the secondary side of the transformer T1;

[0066] PCB board b is used to make the joint surface of solder and pin firm and transfer the heat of working heating components of switching power supply circuit a to heat absorbing medium;

[0067] The transformer structure c is used to separate the incoming electromagnetic wire from adjacent components and to separate the outgoing electromagnetic wire from adjacent components while separating the outgoing electromagnetic wires of two adjacent electromagnetic wires.

[0068] The present invention proposes a preferred embodiment of an electric control board of a compact LED controller, such as Figures 1 to 6As shown, the transformer T1 of the switching power supply circuit a adopts the transformer structure c, the switching power supply circuit a is mounted on the PCB board b and the transformer T1 is arranged at the edge of the PCB board b, so that the components of the electric control board close to the transformer T1 are concentrated on one side of the transformer T1, and the transformer structure c can be better utilized to separate the incoming line of the electromagnetic wire from the adjacent components and the outgoing line of the electromagnetic wire from the adjacent components, while separating the outgoing lines of two adjacent electromagnetic wires, so as to avoid electrical faults or short circuits caused by sticking to each other, and improve the anti-interference performance of the electric control board; at the same time, the characteristics of the PCB board b are utilized to make the joint surface of the solder and the component pins more firm, and the joint surface is utilized to quickly conduct the heat of the working heat-generating components (generally chips, transformers and large capacitors, etc.) in the switching power supply circuit a to the heat-absorbing medium (air, heat-conducting glue, etc.), solving the problem of tightness. The compact electric control board has firm and stable welding and heat dissipation problems; on this basis, after the switching power supply circuit a is powered on and the self-power supply is stable, the low-voltage adjustment voltage puts itself in low-power consumption mode to output dimming current, which can reduce the fluctuation of dimming current while realizing dimming with low power consumption (compact LED controllers are generally adapted to LED lamps with relatively low voltage, so low-voltage dimming can meet the needs and reduce power consumption), reduce heat generation to a certain extent, and in this process, filter out the common-mode interference generated by the coupling of the primary and secondary sides of the transformer T1, while improving the anti-interference ability of the switching power supply circuit a; finally, with the cooperation of the switching power supply circuit a, the PCB board b and the transformer structure c, the compact LED controller can have the four characteristics of low power consumption, anti-interference, fast heat dissipation and firm pin welding.

[0069] Further, the switching power supply circuit a includes a rectifying and filtering unit a4, a transformer T1, a load receiving unit a5 and a low-power and anti-interference PFC flyback module a6 based on a gallium nitride chip; the output end of the rectifying and filtering unit a4 is electrically connected to the input end of the low-power and anti-interference PFC flyback module a6, the output end of the low-power and anti-interference PFC flyback module a6 is electrically connected to the primary side of the transformer T1, the secondary side of the transformer T1 is electrically connected to the input end of the load receiving unit a5, and the anti-interference end of the low-power and anti-interference PFC flyback module a6 is electrically connected to the anti-interference end of the load receiving unit a5;

[0070] The low-power and anti-interference PFC flyback module a6 is used to generate an adjustment voltage to control the transformer T1 to output a dimming current to the load receiving unit a5 when the rectifier filter unit a4 outputs a rectified current and the self-power supply is stable; the adjustment range of the adjustment voltage is zero to a preset maximum voltage; when the adjustment range of the adjustment voltage is zero to a low-power voltage value, the low-power and anti-interference PFC flyback module a6 is in a low-power mode;

[0071] The low-power and anti-interference PFC flyback module a6 is also used to filter out the common-mode interference generated by the coupling between the primary side and the secondary side of the transformer T1.

[0072] In this embodiment, Figure 2 As shown, the core circuit of the LED controller, the low-power and anti-interference PFC flyback module a6, adopts a low-power circuit design, and the original power supply mode in which the adjustment range of the voltage can only be adjusted from half load to full load (i.e., the preset voltage maximum value) when the auxiliary winding provides power is changed to the low-power and anti-interference PFC flyback module a6 self-powered to achieve the adjustment range of the voltage from zero to the preset voltage maximum value. Therefore, compared with the original adjustment range, the low-voltage adjustment range is increased, that is, the adjustment range of the adjustment voltage is from zero to the low-power voltage value, which is suitable for the case when the voltage demand of the subsequent load side is smaller than the voltage value of the original auxiliary winding half load. The low-power PFC flyback module is in low-power mode, which can greatly reduce the selection requirements of the energy-consuming components in the transformer T1 and the load receiving unit a5 at this time, thereby reducing the power consumption of the low-power and anti-interference PFC flyback module a6 itself, the transformer T1, the load receiving unit a5 and the load side, and greatly reducing the overall power consumption of the LED controller. It should be noted that there is no clear limit for the low-power voltage value, and it can be considered to belong to the low-power range if it is lower than the lower limit of the auxiliary winding adjustment.

[0073] More importantly, the low-power and anti-interference PFC flyback module a6 is based on the gallium nitride (GaN) chip for circuit design, which can reduce power consumption at the chip level; because the gallium nitride material itself has excellent physical properties, including high critical breakdown electric field and high electron mobility. These characteristics enable gallium nitride chips to achieve higher operating frequencies and lower on-resistance at the same off-state blocking voltage level. The reduction in on-resistance means that less heat is generated when current passes through, thereby reducing power consumption. Secondly, the switching energy efficiency of gallium nitride chips is high. Compared with traditional silicon-based transistors, gallium nitride products have lower switching losses. This is due to the high-speed switching capability of gallium nitride materials, which makes the chip consume less energy during the switching process. In addition, gallium nitride chips are also characterized by small size and high power density. This means that at the same power output, the gallium nitride chip requires a smaller physical size, thereby reducing the heat dissipation area and heat dissipation requirements, further reducing power consumption.

[0074] Moreover, the low-power and anti-interference PFC flyback module a6 not only filters out the common-mode interference generated by the coupling between the primary and secondary sides of the transformer T1, but also waits for the self-power supply to stabilize before outputting the regulated voltage, thereby reducing the current fluctuation of the load receiving unit a5, and obtaining a stable dimming current, thereby improving the anti-interference ability of the switching power supply circuit a.

[0075] Furthermore, the low-power and anti-interference PFC flyback module a6 includes a startup unit a2, a low-power PFC unit a1 and a low-power flyback unit a3; the input end of the PFC unit a1 is used as the input end of the low-power and anti-interference PFC flyback module a6, the output end of the flyback unit a3 is used as the output end of the low-power and anti-interference PFC flyback module a6, and the anti-interference end of the PFC unit a1 is used as the anti-interference end of the low-power and anti-interference PFC flyback module a6;

[0076] The output end of the PFC unit a1 and the input end of the flyback unit a3 are both electrically connected to the high voltage startup pin HV, the power end of the PFC unit a1 is electrically connected to the first end of the startup unit a2, the power end of the flyback unit a3 is electrically connected to the second end of the startup unit a2, and the ground end of the PFC unit a1, the ground end of the startup unit a2 and the ground end of the flyback unit a3 are all grounded;

[0077] The start-up unit a2 is used to supply power to start the flyback unit a3 first, and then delay the power supply to start the PFC unit a1 after the rectifier filter circuit a4 outputs the rectified current; when the PFC unit a1 is started, the PFC unit a1 supplies power to the flyback unit a3;

[0078] When both the PFC unit a1 and the flyback unit a3 are started, the flyback unit a3 generates a regulated voltage;

[0079] Both the PFC unit a1 and the flyback unit a3 use gallium nitride chips;

[0080] The PFC unit a1 is used to filter out common-mode interference generated by coupling between the primary side and the secondary side of the transformer T1.

[0081] In the present embodiment, the two core circuits of the PFC unit 1 and the flyback unit a3 of the low-power and anti-interference PFC flyback module a6 are a switching power supply circuit composed of a low-power design to achieve low-power operation of the low-power and anti-interference PFC flyback module a6; wherein the PFC unit a1 is used to correct the input current into a sine wave with the same phase as the input voltage and without distortion, improve the power factor, improve the energy utilization efficiency, reduce harmonics, and filter out the common-mode interference generated by the coupling between the primary side and the secondary side of the transformer T1; the flyback unit a3 is used to store the electric energy boosted by the PFC unit a1 and improve the energy conversion efficiency to stably output it to the subsequent LED and absorb the instantaneous overvoltage; thereby, the low-power and anti-interference PFC flyback module a6 has a certain anti-interference ability while running with low power consumption.

[0082] On the basis of the above, the PFC unit a1 (relatively low power consumption) replaces the original auxiliary winding (relatively high power consumption) to continuously provide power to the flyback unit a3. The flyback unit a3 has the switching capability to determine whether the dimming current on the secondary side of the transformer T1 is output; therefore, after the rectifier filter circuit a4 outputs the rectified current, it flows through the PFC unit a1 and the flyback unit a3, and the start-up unit a2 obtains the high-voltage start-up power through the flyback unit a3 to first supply power to start the flyback unit a3. At the same time, the PFC unit a1 also stores power, and starts the PFC unit a1 after a delay. At this time, the PFC unit a1 has stored enough power to supply power to the flyback unit a3 and the transformer. T1 continuously provides a smooth and stable high voltage, so that the flyback unit a3 can continuously obtain electric energy from the PFC unit a1. At this time, the flyback unit a3 controls the transformer T1 to release energy to the load receiving unit a5, so as to meet the current demand of the load receiving unit a5 and reduce the current fluctuation of the load receiving unit a5, thereby obtaining a stable dimming current. Moreover, because the flyback unit a3 is affected by the output voltage of the PFC unit a1 rather than the output voltage of the original auxiliary winding, when the output voltage range of the PFC unit a1 can be from zero to the upper limit clamping voltage, the flyback unit a3 can also obtain a regulation voltage with a larger regulation range for controlling the load receiving unit a5.

[0083] Further, the PFC unit a1 includes a capacitor EC1, a capacitor CB1, a capacitor C2, a capacitor C3, a capacitor C6, a resistor R9, a resistor R29, a resistor R30, a resistor R4, a resistor R18, a resistor R19, a resistor R20, a resistor R2, a resistor R6, a resistor R5, a resistor R3, a resistor R8, an inductor L2, a diode D1, a diode D2, a gallium nitride PFC chip U1 and a first anti-interference circuit a11; one end and the other end of the capacitor CB1 are both used as an input end of the PFC unit a1, the positive electrode of the capacitor EC1 is used as an output end of the PFC unit a1, the negative electrode of the capacitor EC1 is used as a ground end of the PFC unit a1, the VDD end of the gallium nitride PFC chip U1 is used as a power supply end of the PFC unit a1, and the first end of the first anti-interference circuit a11 is used as an anti-interference end of the PFC unit a1;

[0084] One end of capacitor CB1, one end of resistor R9, one end of inductor L2, the anode of diode D1, and one end of capacitor C2 are all electrically connected to the second end of the first anti-interference circuit a11, the other end of capacitor C2, the cathode of diode D1, the cathode of diode D2, and one end of resistor R3 are all electrically connected to the positive electrode of capacitor EC1, the other end of resistor R9 is electrically connected to one end of resistor R29, the other end of resistor R29 is electrically connected to one end of resistor R30, the other end of resistor R30, one end of capacitor C3, and one end of resistor R4 are all electrically connected to the VAC end of gallium nitride PFC chip U1, the other end of inductor L2, The anode of the diode D2 is electrically connected to the DRAIN terminal of the gallium nitride PFC chip U1, the other end of the resistor R3 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to one end of the resistor R5, the other end of the resistor R5, one end of the resistor R2, one end of the resistor R6, and one end of the capacitor C6 are all electrically connected to the INV terminal of the gallium nitride PFC chip U1, the other end of the resistor R2, the other end of the resistor R6, the other end of the capacitor C6, the GND terminal of the gallium nitride PFC chip U1, the other end of the resistor R4, the other end of the capacitor C3, and the other end of the capacitor CB1 are all electrically connected to the negative electrode of the capacitor EC1;

[0085] The flyback unit a3 includes a capacitor C11, a capacitor C14, a resistor R7, a resistor R16, a resistor R13, a resistor R14, a resistor R15, a resistor R21, an inductor L3, a gallium nitride flyback chip U2, and a second anti-interference circuit a31; the VDD end of the gallium nitride flyback chip U2 is used as a power supply end of the flyback unit a3, the HV end of the gallium nitride flyback chip U2 is used as an input end of the flyback unit a3, one end of the inductor L3 and a first end of the second anti-interference circuit a31 are both used as output ends of the flyback unit a3, and one end of the resistor R13 is used as a ground end of the flyback unit a3;

[0086] The HV end of the gallium nitride flyback chip U2 is electrically connected to the second end of the second anti-interference circuit a31, the DRAIN end of the gallium nitride flyback chip U2, the third end of the second anti-interference circuit a31, and the other end of the inductor L3 are all electrically connected to one end of the capacitor C14, the other end of the capacitor C14, one end of the resistor R21, one end of the resistor R15, one end of the resistor R14, and the other end of the resistor R13 are all electrically connected to the CS end of the gallium nitride flyback chip U2, the other end of the resistor R21, the other end of the resistor R15, and the other end of the resistor R14 are all electrically connected to one end of the resistor R13, the OVP end of the gallium nitride flyback chip U2, one end of the resistor R7, and one end of the resistor R16 are all electrically connected to one end of the capacitor C11, and the GND end of the gallium nitride flyback chip U2, the other end of the resistor R7, the other end of the resistor R16, and the other end of the capacitor C11 are all grounded;

[0087] The start-up unit 2 includes a capacitor C1, a capacitor C7, a capacitor C10 and a resistor R23; one end of the capacitor C7 is used as a first end of the start-up unit 2, and one end of the capacitor C10 is used as a second end of the start-up unit a2;

[0088] One end of the resistor R23 is electrically connected to one end of the capacitor C10, the other end of the resistor R23 and one end of the capacitor C1 are electrically connected to one end of the capacitor C7, and the other end of the capacitor C1, the other end of the capacitor C7 and the other end of the capacitor C10 are grounded;

[0089] The second anti-interference circuit a31 includes a capacitor C5, a resistor R10, a resistor R11, a resistor R12, a resistor R17 and a diode D3; one end of the capacitor C5 is used as a first end of the second anti-interference circuit a31, one end of the resistor R11 is used as a second end of the second anti-interference circuit a31, and an anode of the diode D3 is used as a third end of the second anti-interference circuit a31;

[0090] One end of the resistor R11 and one end of the resistor R12 are electrically connected to one end of the capacitor C5, the other end of the resistor R11, the other end of the resistor R12, one end of the resistor R10, and one end of the resistor R17 are electrically connected to the other end of the capacitor C5, and the other end of the resistor R10 and the other end of the resistor R17 are electrically connected to the cathode of the diode D3;

[0091] The first anti-interference circuit a11 includes a capacitor CY1; one end of the capacitor CY1 is used as a first end of the first anti-interference circuit a11, and the other end of the capacitor CY1 is used as a second end of the first anti-interference circuit a11;

[0092] The load receiving unit a5 includes a resistor R26, a resistor R27, a capacitor C9, a capacitor EC2, a diode D6 and a diode D7; the anode of the diode D7 and the cathode of the capacitor EC2 are both used as input terminals of the load receiving unit a5, the cathode of the diode D7 is used as an anti-interference terminal of the load receiving unit a5, and one end and the other end of the resistor R27 are used as output terminals of the load receiving unit a5;

[0093] The anode of diode D6 and one end of resistor R26 are electrically connected to the anode of diode D7, the other end of resistor R26 is electrically connected to one end of capacitor C9, the other end of capacitor C9, the cathode of diode D6, the positive electrode of capacitor EC2, and one end of resistor R27 are electrically connected to the cathode of diode D7, and the negative electrode of capacitor EC2 and the other end of resistor R27 are grounded.

[0094] In this embodiment, the low-power circuit principle of the PFC unit a1 is as follows: the gallium nitride PFC chip U1 (for example, the OB3674 chip) and its peripheral circuits are used to form an output voltage follower, so that the gallium nitride PFC chip U1 does not need to be boosted to the maximum value all the time. When the input voltage is low, the output voltage of the PFC is relatively reduced to reduce the power loss of the internal boost of the chip, reduce the turn-on loss of the switch, improve efficiency, and achieve low power consumption and anti-interference. The regulation voltage of the PFC flyback module a6 can be freely adjusted from zero to the preset voltage maximum value.

[0095] The low-power operation principle of the flyback unit a3 is: using the gallium nitride flyback chip U2 (such as the OB8652 chip) and its peripheral circuits to follow the output voltage of the PFC unit a1 for regulation. When the PFC unit a1 is reduced, it follows the reduction of the regulation voltage to reduce its own power consumption.

[0096] The principle of improving the anti-interference performance of the PFC unit a1 is as follows: the first anti-interference circuit a11 is used to filter out the common-mode interference generated by the coupling between the primary side and the secondary side of the transformer T1 , that is, the capacitor CY1 is used as a decoupling capacitor.

[0097] The principle of improving the anti-interference performance of the flyback unit a3 is as follows: utilizing the second anti-interference circuit a31, namely the RCD absorption circuit, to absorb the instantaneous overvoltage on the primary side of the transformer T1, thereby ensuring the voltage stability on the primary side.

[0098] The startup sequence principle of the startup unit a2 is as follows: there are two startup terminals, the first startup terminal is composed of capacitor C10, and the second startup terminal is composed of capacitors C1 and C7. The first startup terminal and the second startup terminal are used to start the flyback unit a3 and the PFC unit a1 respectively, that is, after the high voltage is started, the VH terminal of the GaN flyback chip U2 is internally connected to the VDD terminal to charge the capacitor C10 first, and the GaN flyback chip U2 starts when the voltage provided by the capacitor C10 to the VDD terminal is higher than the UVLO (OFF). At this time, the capacitors C1 and C7 are charged to supply power to the GaN PFC chip U1. It should be noted that the charging time of the capacitors C10, C1 and C7 is the delayed start time of the PFC unit 1.

[0099] The load receiving unit a5 is a rectifier and filter circuit, which is used to receive the dimming current transmitted from the secondary side of the transformer T1 to ensure the stability of the subsequent circuit. At the same time, with this design, the diode D6, the diode D7 and the capacitor EC2 in the rectifier and filter circuit will be the main energy-consuming components. By replacing the diode D6, the diode D7 and the capacitor EC2 with smaller specifications corresponding to the dimming current, the power consumption of the load receiving unit a5 can be reduced as a whole. Compared with other rectifier and filter circuits, it is easier to make adaptive modifications to energy consumption.

[0100] Furthermore, the PCB board b is provided with a heat dissipation solder structure b1 and a strong adhesion solder structure b2; the pins of the working heat generating components adopt the heat dissipation solder structure b1, and the heat dissipation solder structure b1 is used to transfer the heat of the working heat generating components to the heat absorbing medium;

[0101] The perforated pad or the patch pad adopts a strong adhesion solder structure b2, and the strong adhesion solder structure b2 is used to make the bonding surface between the solder and the pin firm;

[0102] The heat dissipation solder structure b1 and the strong adhesion solder structure b2 can be provided at the same time.

[0103] In this embodiment, Figure 3 As shown, in order to solve the heating problem of the working heat-generating components, a heat-dissipating solder structure b1 is adopted in the pin welding method. The fast thermal conductivity of the heat-dissipating solder structure b1 is utilized to transfer the heat of the working heat-generating components from the pins to the heat-dissipating solder structure b1. Then, the heat is dissipated through full contact between the heat-dissipating solder structure b1 and the heat-absorbing medium. This solves the heating problem of the working heat-generating components, improves the heat dissipation efficiency of the entire PCB board, and supports compact circuit design of the PCB board (the core heat-generating components that generate heat in the circuit solve the heat dissipation problem, which is equivalent to solving the heating problem of the circuit).

[0104] In order to solve the problem of poor contact between solder and pin when the most commonly used perforated pads or surface mount pads are welded to the pins of components, a strong adhesion solder structure b2 is adopted in the welding method. By utilizing the flow conduction characteristics of the strong adhesion solder structure b2 for solder, the solder is more likely to gather on the pad during welding, so that the contact between the solder and the pin is more complete, thereby making the joint surface of the solder and the pin more firm, solving the problem of poor contact between the solder and the pin.

[0105] More importantly, the heat dissipation solder structure b1 and the strong adhesion solder structure b2 can be set at the same time. The pins and pads are first welded using the strong adhesion solder structure b2, and then the solder is expanded into the heat dissipation solder structure b1 based on the strong adhesion solder structure b2, thereby achieving the effects of firm welding and good heat dissipation performance.

[0106] Furthermore, the solder joints of the pins of the working heat generating components spread outward or in a directional manner to expand the solder surface to form a heat dissipation solder structure b1;

[0107] The heat dissipation solder structure b1 includes a solder point solder surface b11 and a circuit solder surface b12; the solder points of the pins of the working heat generating components spread outward to form the solder point solder surface b11, and the solder point solder surface b11 directionally spreads out along the copper foil layer of the circuit connected by the solder points of the pins of the working heat generating components to form the circuit solder surface b12;

[0108] The circuit solder surface b12 includes at least one solder strip b121; the solder strip b121 is connected to the solder point solder surface b11, and the solder strips b121 are connected to each other.

[0109] In this embodiment, in order to form the rapid thermal conductivity characteristics of the heat dissipation solder structure b1, the solder surface is expanded from the solder points of the pins of the working heat-generating components to the surrounding or directional large areas, thereby expanding the contact area between the solder and the heat-absorbing medium, so that the heat absorbed by the solder from the working heat-generating components can be dissipated by expanding the contact area with the heat-absorbing medium, thereby making the heat dissipation solder structure b1 have rapid thermal conductivity characteristics.

[0110] Specifically, the solder surface expansion feature of the heat dissipation solder structure b1 is mainly composed of the solder point solder surface b11 and the circuit solder surface b12; the available space around the solder point of the working heat generating component pin is used to add a copper foil layer, and the solder surface is spread and expanded as much as possible to form the solder point solder surface b11, so that the heat conducted from the solder point can be dispersed to the surroundings via the shortest path; on this basis, it is also necessary to expand the solder surface as much as possible to contact the heat absorbing medium to achieve the purpose of heat dissipation, but at this time there is no available space around the solder point for adding a copper foil layer, so the solder point solder surface b11 can use the copper foil layer of the circuit connected to the solder point to directionally spread and expand the solder surface to form the circuit solder surface b12 to expand the heat dissipation area and improve the heat dissipation efficiency.

[0111] Specifically, since the circuit solder surface b12 is arranged along the circuit copper foil layer, the field performance is composed of at least one solder strip b121. When the line width of the circuit copper foil layer is relatively large (such as the ground line), a heat dissipation network can be formed by multiple solder strips b121. Therefore, the solder strips b121 are connected to the solder surface b11 of the solder point, and the solder strips b121 can be connected to each other, that is, the connection method between the solder strips b121 is not limited, and ultimately they can be connected to the solder surface b11 of the solder point for heat conduction.

[0112] Furthermore, the strong adhesion solder structure b2 is a multi-angle solder surface b21 or an asymmetric solder surface b22;

[0113] The solder point of the pin extends the solder surface in the offset direction of the pin relative to the through-hole pad to form an asymmetric solder surface b22.

[0114] In this embodiment, in order to make the strong adhesion solder structure b2 have the effect of accumulating solder, the strong adhesion solder structure b2 is set to a multi-angle solder surface 21 or an asymmetric solder surface b22, wherein the multi-angle solder surface b21 is aimed at the tin on the patch pad, and compared with the conventional circular solder surface, its edges are more likely to guide the solder, so that the solder can reflux in the pad to fully wrap the pins placed on the patch pad; and the asymmetric solder surface b22 is aimed at the perforated pad. Compared with the conventional circular solder surface, the asymmetric solder surface b22 formed in the offset direction of the corresponding pin after passing through the solder hole can increase the contact area between the offset pin and the solder, thereby avoiding poor contact due to tilting or bending of the pin.

[0115] Specifically, because the asymmetric solder surface b22 is designed to increase the contact area of ​​tilted or bent pins, it is necessary to extend the solder surface from the solder point of the pin to the offset direction of the pin relative to the perforated pad to form the asymmetric solder surface b22. Then, tin can be applied along the offset direction of the pin to increase the contact area.

[0116] Specifically, the multi-angle solder surface b21 needs to be welded into a triangle, square or rectangle according to the convenience of welding according to the pin distribution method and component shape of different SMD components; for example, when the SMD component is a chip, its pins are arranged on both sides, and the middle between the two rows of pins is covered by the chip. Therefore, the multi-angle solder surface 21 is preferably square or rectangular for easier operation and improved welding efficiency.

[0117] Further, the transformer structure c includes a transformer skeleton c1; the transformer skeleton c1 includes a top cover c2, a winding post c3 and a base c4; the top surface and the bottom surface of the winding post c3 are fixedly connected to the bottom surface of the top cover c2 and the top surface of the base c4 respectively, and the outer wall of the winding post c3, the bottom surface of the top cover c2 and the top surface of the base c4 are surrounded to form a winding groove c5;

[0118] An incoming line separation structure c41 is provided on the rear side of the base c4, and an outgoing line separation structure c42 is provided on the front side of the base c4.

[0119] In this embodiment, Figures 4 to 6As shown, since the incoming electromagnetic wires are usually arranged at the edge of the electric control panel and connected to the power supply at the same voltage level, the incoming wire separation structure c41 is designed to separate two adjacent electromagnetic wires to avoid mutual influence between the incoming electromagnetic wires and components; and the outgoing electromagnetic wires are used as the port for transformer energy output, and their design focuses on meeting the needs of different loads and improving safety, and the voltage levels are different. Therefore, the outgoing wire separation structure c42 is used to separate the electromagnetic wires and components while ensuring that the two adjacent electromagnetic wires are separated. It can avoid the mutual influence between the outgoing electromagnetic wires and components while ensuring multiple independent or separate outputs of different voltage levels without interfering with each other, thereby ensuring the stability of different power systems. Therefore, the transformer skeleton c1 is fixedly connected by the top and bottom surfaces of the winding column c3 with the bottom surface of the top cover c2 and the top surface of the base c4 respectively, so that the outer wall of the winding column c3, the bottom surface of the top cover c2 and the top surface of the base c4 are surrounded to form a winding groove c5, and then an incoming wire separation structure c41 is arranged on the rear side of the base c4, and an outgoing wire separation structure c42 is arranged on the front side of the base c4; thereby, the electromagnetic wire can be separated from the components by the incoming wire separation structure c41 when entering the electromagnetic wire, and then enter the winding groove c5 along the top surface of the base c4 to be wound around the winding column c3 to form a winding, and finally the outgoing wire of the electromagnetic wire uses the outgoing wire separation structure c42 to separate each electromagnetic wire from each other and separate the electromagnetic wire and the components during the lead-out process; thereby achieving the design purpose of the transformer skeleton c1.

[0120] In summary, the transformer skeleton c1 utilizes the incoming line separation structure c41 and the outgoing line separation structure c42 to separate the electromagnetic wires from the components adjacent to the electromagnetic wires in the compact electric control panel, effectively avoiding the contact between the incoming and outgoing lines and other components, improving the stability and reliability of the electric control panel, and avoiding problems such as electrical failures and short circuits; at the same time, the outgoing line separation structure c42 is utilized to separate the outgoing lines of different voltage levels of the transformer so that they do not interfere with each other, thereby ensuring the stability of the outputs of different voltage levels.

[0121] Furthermore, the outgoing wire separation structure c42 is arranged on the left side of the base c4 or the right side of the base c4 relatively far away from the components, and the outgoing wire separation structure c42 is provided with at least one outgoing wire guide groove c421 in parallel from left to right, and the front bottom surface of the outgoing wire separation structure c42 is provided with outgoing wire electrical connection pins c422 corresponding to the outgoing wire guide grooves c421 one by one;

[0122] The outgoing wire guide groove c421 is used to lay the electromagnetic wire and guide the electromagnetic wire from the winding groove c5 to the outgoing wire electrical connection pin c422;

[0123] The outgoing wire guide groove c421 closest to the components is arranged at the bottom of the outgoing wire separation structure c42, the front end of the outgoing wire guide groove c421 is shortened relative to the front end of the outgoing wire separation structure c42 to form an upward winding step c424, and the groove wall of one side of the outgoing wire guide groove c421 close to the components is extended downward to form a baffle c423;

[0124] Except for the outgoing wire guide groove c421 closest to the components, the remaining outgoing wire guide grooves c421 are all arranged on the top of the outgoing wire separation structure c42.

[0125] In this embodiment, since the transformer is arranged in a compact electric control panel, the distribution space of components in the panel is limited. In order to make the transformer realize the separation function in the limited space, the outgoing wire separation structure c42 is arranged on the left side of the base c4 or the right side of the base c4 which is relatively far away from the components. The outgoing wire separation structure c42 is provided with at least one outgoing wire guide groove c421 in parallel from left to right. The front bottom surface of the outgoing wire separation structure c42 is provided with outgoing wire electrical connection pins c422 corresponding to the outgoing wire guide grooves c421 one by one, so that the outgoing wires of multiple electromagnetic wires can be concentrated together and the electromagnetic wires are laid by the outgoing wire guide grooves c421, so that the electromagnetic wires can be buried in the grooves, and the electromagnetic wires or components adjacent thereto are separated by the groove walls to realize the target function, and the electromagnetic wires are guided from the winding grooves c5 to the outgoing wire electrical connection pins c422 by the outgoing wire guide grooves c421 (the guiding path is as shown in FIG. Figure 4 As shown by the dotted line), the electromagnetic wire is electrically connected to the outlet wire electrical connection pin c422 (such as a pin, inserted into the welding hole of the electronic control board).

[0126] Specifically, because the transformer T1 is arranged at the edge of the PCB board b, when the outgoing wire separation mechanism c42 is arranged on the left or right side of the base c4, the outgoing wire guide groove c41 on one side of the outgoing wire separation mechanism c42 will be closest to the components in the electric control board and needs to be separated. Therefore, the outgoing wire guide groove c421 closest to the components is arranged at the bottom of the outgoing wire separation structure c42, so that the exposed area of ​​the electromagnetic wire is minimized after the transformer is installed on the electric control board, and the isolation effect is better; the front end of the outgoing wire guide groove c421 is shortened relative to the front end of the outgoing wire separation structure c42 to form an upward winding step c424, so that the end of the electromagnetic wire can be wound upward through the upward winding step c424 and then connected to the outgoing wire electrical connection pin c422 (such as Figure 1The dotted line of the outlet guide groove c421 prevents the electromagnetic wire from being separated from the outlet guide groove c421 due to gravity when the outlet guide groove c421 is set at the bottom of the base c4; and the groove wall of the outlet guide groove c421 close to the components is extended downward to form a baffle c423. After the transformer is installed on the electric control board, the baffle c423 can be used to completely isolate the electromagnetic wire and the components. Except for the outlet guide groove c421 closest to the components, the remaining outlet guide grooves c421 are relatively far away from the components, so they can be set at the top of the outlet separation structure c42, which has a simple structure and smoother guidance.

[0127] Furthermore, the incoming wire separation structure c41 is provided with a plurality of incoming wire guide grooves c411 and teeth c412 in parallel from left to right; a plurality of incoming wire electrical connection pins c413 are provided on the rear bottom surface of the incoming wire separation structure c41;

[0128] The incoming wire guide groove c411 is used to lay the electromagnetic wire and guide the electromagnetic wire from the incoming wire electrical connection pin c413 to the winding groove 5.

[0129] In this embodiment, the incoming wire separation structure c41 uses the incoming wire guide groove c411 to guide and isolate the electromagnetic wire; then the incoming wire guide groove c411 and the tooth c412 provide a stable support and fixing point for the incoming wire of the electromagnetic wire. Because during the operation of the transformer, the current in the winding will generate electromagnetic force, which may cause the wire to vibrate or move. By providing the incoming wire guide groove c411 and the tooth c412, the electromagnetic wire can be effectively fixed to prevent it from loosening or shifting due to vibration, thereby ensuring the stability and safety of the winding.

[0130] Other structures and operations of the electric control board of a compact LED controller according to an embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0131] In the description of this specification, the description with reference to the terms "embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0132] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric control board of a compact LED controller, characterized in that: It includes a switching power supply circuit, a PCB board and a transformer structure; the transformer T1 of the switching power supply circuit adopts the transformer structure, the switching power supply circuit is loaded on the PCB board and the transformer T1 is arranged at the edge of the PCB board; The switching power supply circuit is used to generate a low-voltage regulation voltage to put itself in a low-power consumption mode after power-on and self-power supply stabilization; and is also used to filter out common-mode interference generated by coupling between the primary side and the secondary side of the transformer T1; The PCB board is used to make the joint surface of the solder and the pin firm and at the same time conduct the heat of the working heating components of the switching power supply circuit to the heat absorbing medium; The transformer structure is used to separate the incoming electromagnetic wire from adjacent components and the outgoing electromagnetic wire from adjacent components, while separating the outgoing electromagnetic wires of two adjacent electromagnetic wires; The switching power supply circuit includes a rectifier and filter unit, the transformer T1, a load receiving unit and a low-power and anti-interference PFC flyback module based on a gallium nitride chip; the output end of the rectifier and filter unit is electrically connected to the input end of the low-power and anti-interference PFC flyback module, the output end of the low-power and anti-interference PFC flyback module is electrically connected to the primary side of the transformer T1, the secondary side of the transformer T1 is electrically connected to the input end of the load receiving unit, and the anti-interference end of the low-power and anti-interference PFC flyback module is electrically connected to the anti-interference end of the load receiving unit; The low-power and anti-interference PFC flyback module is used to generate the adjustment voltage to control the transformer T1 to output the dimming current to the load receiving unit when the rectification and filtering unit outputs the rectified current and the self-power supply is stable; the adjustment range of the adjustment voltage is zero to the preset maximum voltage; when the adjustment range of the adjustment voltage is zero to the low-power voltage value, the low-power and anti-interference PFC flyback module is in the low-power mode; The low-power and anti-interference PFC flyback module is also used to filter out the common-mode interference generated by the coupling between the primary side and the secondary side of the transformer T1; The low-power and anti-interference PFC flyback module comprises a startup unit, a low-power PFC unit and a low-power flyback unit; the input end of the PFC unit is used as the input end of the low-power and anti-interference PFC flyback module, the output end of the flyback unit is used as the output end of the low-power and anti-interference PFC flyback module, and the anti-interference end of the PFC unit is used as the anti-interference end of the low-power and anti-interference PFC flyback module; The output end of the PFC unit and the input end of the flyback unit are both electrically connected to the high-voltage startup pin HV, the power end of the PFC unit is electrically connected to the first end of the startup unit, the power end of the flyback unit is electrically connected to the second end of the startup unit, and the ground end of the PFC unit, the ground end of the startup unit and the ground end of the flyback unit are all grounded; The start-up unit is used to supply power to start the flyback unit first, and then delay the supply of power to start the PFC unit after the rectifier filter circuit outputs the rectified current; When the PFC unit is started, the PFC unit supplies power to the flyback unit; When the PFC unit and the flyback unit are both started, the flyback unit generates the regulation voltage; The PFC unit and the flyback unit both use gallium nitride chips; The PFC unit is used to filter out common-mode interference generated by coupling between the primary side and the secondary side of the transformer T1; The PCB board is provided with a heat dissipation solder structure and a strong adhesion solder structure; the pins of the working heat generating components adopt the heat dissipation solder structure, and the heat dissipation solder structure is used to conduct the heat of the working heat generating components to the heat absorbing medium; The perforated pad or the patch pad adopts the strong adhesion solder structure, and the strong adhesion solder structure is used to make the bonding surface between the solder and the pin firm; The heat dissipation solder structure and the strong adhesion solder structure can be provided at the same time.

2. The electronic control board of a compact LED controller according to claim 1, characterized in that: The PFC unit includes a capacitor EC1, a capacitor CB1, a capacitor C2, a capacitor C3, a capacitor C6, a resistor R9, a resistor R29, a resistor R30, a resistor R4, a resistor R18, a resistor R19, a resistor R20, a resistor R2, a resistor R6, a resistor R5, a resistor R3, a resistor R8, an inductor L2, a diode D1, a diode D2, a gallium nitride PFC chip U1 and a first anti-interference circuit; one end and the other end of the capacitor CB1 are both used as the input end of the PFC unit, the positive electrode of the capacitor EC1 is used as the output end of the PFC unit, the negative electrode of the capacitor EC1 is used as the ground end of the PFC unit, the VDD end of the gallium nitride PFC chip U1 is used as the power supply end of the PFC unit, and the first end of the first anti-interference circuit is used as the anti-interference end of the PFC unit; One end of the capacitor CB1, one end of the resistor R9, one end of the inductor L2, the anode of the diode D1, and one end of the capacitor C2 are all electrically connected to the second end of the first anti-interference circuit, the other end of the capacitor C2, the cathode of the diode D1, the cathode of the diode D2, and one end of the resistor R3 are all electrically connected to the positive electrode of the capacitor EC1, the other end of the resistor R9 is electrically connected to one end of the resistor R29, the other end of the resistor R29 is electrically connected to one end of the resistor R30, the other end of the resistor R30, one end of the capacitor C3, and one end of the resistor R4 are all connected to the VAC end of the gallium nitride PFC chip U1. The other end of the inductor L2 and the anode of the diode D2 are electrically connected to the DRAIN end of the gallium nitride PFC chip U1, the other end of the resistor R3 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to one end of the resistor R5, the other end of the resistor R5, one end of the resistor R2, one end of the resistor R6, and one end of the capacitor C6 are electrically connected to the INV end of the gallium nitride PFC chip U1, the other end of the resistor R2, the other end of the resistor R6, the other end of the capacitor C6, the GND end of the gallium nitride PFC chip U1, the other end of the resistor R4, the other end of the capacitor C3, and the other end of the capacitor CB1 are electrically connected to the negative electrode of the capacitor EC1; The flyback unit includes a capacitor C11, a capacitor C14, a resistor R7, a resistor R16, a resistor R13, a resistor R14, a resistor R15, a resistor R21, an inductor L3, a gallium nitride flyback chip U2 and a second anti-interference circuit; the VDD end of the gallium nitride flyback chip U2 is used as the power supply end of the flyback unit, the HV end of the gallium nitride flyback chip U2 is used as the input end of the flyback unit, one end of the inductor L3 and the first end of the second anti-interference circuit are both used as the output end of the flyback unit, and one end of the resistor R13 is used as the ground end of the flyback unit; The HV end of the gallium nitride flyback chip U2 is electrically connected to the second end of the second anti-interference circuit, the DRAIN end of the gallium nitride flyback chip U2, the third end of the second anti-interference circuit, and the other end of the inductor L3 are all electrically connected to one end of the capacitor C14, the other end of the capacitor C14, one end of the resistor R21, one end of the resistor R15, one end of the resistor R14, and the other end of the resistor R13 are all electrically connected to the CS end of the gallium nitride flyback chip U2, the other end of the resistor R21, the other end of the resistor R15, and the other end of the resistor R14 are all electrically connected to one end of the resistor R13, the OVP end of the gallium nitride flyback chip U2, one end of the resistor R7, and one end of the resistor R16 are all electrically connected to one end of the capacitor C11, and the GND end of the gallium nitride flyback chip U2, the other end of the resistor R7, the other end of the resistor R16, and the other end of the capacitor C11 are all grounded; The startup unit includes a capacitor C1, a capacitor C7, a capacitor C10 and a resistor R23; one end of the capacitor C7 is used as a first end of the startup unit, and one end of the capacitor C10 is used as a second end of the startup unit; One end of the resistor R23 is electrically connected to one end of the capacitor C10, the other end of the resistor R23 and one end of the capacitor C1 are electrically connected to one end of the capacitor C7, and the other end of the capacitor C1, the other end of the capacitor C7 and the other end of the capacitor C10 are all grounded; The second anti-interference circuit includes a capacitor C5, a resistor R10, a resistor R11, a resistor R12, a resistor R17 and a diode D3; one end of the capacitor C5 is used as a first end of the second anti-interference circuit, one end of the resistor R11 is used as a second end of the second anti-interference circuit, and an anode of the diode D3 is used as a third end of the second anti-interference circuit; One end of the resistor R11 and one end of the resistor R12 are electrically connected to one end of the capacitor C5, the other end of the resistor R11, the other end of the resistor R12, one end of the resistor R10, and one end of the resistor R17 are electrically connected to the other end of the capacitor C5, and the other end of the resistor R10 and the other end of the resistor R17 are electrically connected to the cathode of the diode D3; The first anti-interference circuit includes a capacitor CY1; one end of the capacitor CY1 is used as a first end of the first anti-interference circuit, and the other end of the capacitor CY1 is used as a second end of the first anti-interference circuit; The load receiving unit includes a resistor R26, a resistor R27, a capacitor C9, a capacitor EC2, a diode D6 and a diode D7; the anode of the diode D7 and the cathode of the capacitor EC2 are both used as input terminals of the load receiving unit, the cathode of the diode D7 is used as an anti-interference terminal of the load receiving unit, and one end and the other end of the resistor R27 are used as output terminals of the load receiving unit; The anode of the diode D6 and one end of the resistor R26 are electrically connected to the anode of the diode D7, the other end of the resistor R26 is electrically connected to one end of the capacitor C9, the other end of the capacitor C9, the cathode of the diode D6, the positive electrode of the capacitor EC2, and one end of the resistor R27 are electrically connected to the cathode of the diode D7, and the negative electrode of the capacitor EC2 and the other end of the resistor R27 are grounded.

3. The electronic control board of a compact LED controller according to claim 1, characterized in that: The solder points of the pins of the working heat generating components spread outward or in a directional manner to expand the solder surface to form the heat dissipation solder structure; The heat dissipation solder structure comprises a solder point solder surface and a circuit solder surface; the solder point of the pin of the working heating component spreads and expands the solder surface to form the solder point solder surface, and the solder point solder surface directionally spreads and expands the solder surface along the circuit copper foil layer connected by the solder point of the pin of the working heating component to form the circuit solder surface; The circuit solder surface includes at least one solder strip; the solder strip is connected to the solder surface of the solder point, and the solder strips are connected to each other.

4. The electronic control board of a compact LED controller according to claim 1, characterized in that: The strong adhesion solder structure is a multi-angle solder surface or an asymmetric solder surface; The solder point of the pin extends the solder surface toward the biased direction of the pin relative to the through-hole pad to form the asymmetric solder surface.

5. The electronic control board of a compact LED controller according to claim 1, characterized in that: The transformer structure comprises the transformer skeleton; the transformer skeleton comprises a top cover, a winding post and a base; the top surface and the bottom surface of the winding post are fixedly connected to the bottom surface of the top cover and the top surface of the base respectively, and the outer wall of the winding post, the bottom surface of the top cover and the top surface of the base together form the winding groove; The incoming line separation structure is provided on the rear side of the base, and the outgoing line separation structure is provided on the front side of the base.

6. The electronic control board of a compact LED controller according to claim 5, characterized in that: The outgoing wire separation structure is arranged on the left side of the base or the right side of the base relatively far away from the components, and the outgoing wire separation structure is provided with at least one outgoing wire guide groove in parallel from left to right, and the front bottom surface of the outgoing wire separation structure is provided with outgoing wire electrical connection pins corresponding to the outgoing wire guide grooves one by one; The outlet wire guide groove is used to lay the electromagnetic wire and guide the electromagnetic wire from the winding groove to the outlet wire electrical connection pin; The outlet guide groove closest to the component is arranged at the bottom of the outlet separation structure, the front end of the outlet guide groove is shortened relative to the front end of the outlet separation structure to form an upward winding step, and the groove wall of one side of the outlet guide groove close to the component is extended downward to form a baffle; Except for the outlet guide groove closest to the component, the rest of the outlet guide grooves are arranged on the top of the outlet separation structure.

7. The electronic control board of a compact LED controller according to claim 5, characterized in that: The inlet wire separation structure is provided with a plurality of inlet wire guide grooves and teeth in parallel from left to right; the rear bottom surface of the inlet wire separation structure is provided with a plurality of inlet wire electrical connection pins; The inlet guide groove is used to lay the electromagnetic wire and guide the electromagnetic wire from the inlet electrical connection pin to the winding groove.

Images