Light source load and driving power supply integrated module and lamp

Abstract

The utility model provides a light source load and driving power supply integrated module and a lamp. The module comprises a rectification circuit, a pi-type filter circuit, a switch control circuit, a light source load and an equipotential component. The input end of the rectification circuit is connected with commercial power, and the output end is connected with the pi-type filter circuit. The input end of the switch control circuit is connected with the pi-type filter circuit, and the output end of the switch control circuit is connected with the light source load; the light source load is connected with the aluminum substrate through the equipotential component. According to the utility model, the equipotential component is arranged, so that the light source load and the aluminum substrate have the same potential, the problem of poor electromagnetism and outburst performance caused by the change of the potential of the substrate along with the voltage jump of the circuit layer in the scheme that the light source load and the driving power supply are integrally integrated on the aluminum substrate for working is solved, and meanwhile, through holes do not need to be formed in the aluminum substrate; and the problem of poor electromagnetic compatibility can also be solved through the integrated design of machining, a light source load and a driving power supply.

Description

Technical Field

[0001] The utility model belongs to the technical field of light source and drive integrated module, and in particular relates to a module and a lamp integrating a light source load and a drive power supply. Background Art

[0002] The integration of the light source load and the driving power supply can save the volume of the lamp and the welding cost of the driving power supply and the light source load, but the existing technology has poor electromagnetic compatibility. The existing solutions are 1. Through the punching and riveting connection method, this method requires special mechanical tools to operate, and the equipment cost investment is high. 2. The "linear power supply solution" adopted in the existing solution has low efficiency, temperature rise and PF cannot be taken into account, it is not suitable for high-power applications, and has poor lightning resistance. Utility Model Content

[0003] In order to overcome the above technical defects, the utility model provides a module and a lamp integrating a light source load and a driving power supply, which can solve the problem of poor electromagnetic compatibility.

[0004] The utility model is realized by the following scheme:

[0005] A module integrating a light source load and a driving power supply, wherein the module is arranged on an aluminum substrate and comprises: a rectifier circuit, a π-type filter circuit, a switch control circuit, a light source load, and an equipotential component;

[0006] The input end of the rectifier circuit is connected to the mains, and the output end is connected to the π-type filter circuit;

[0007] The input end of the switch control circuit is connected to the π-type filter circuit, and the output end is connected to the light source load;

[0008] The light source load is connected to the aluminum substrate through the equipotential component.

[0009] As a further improvement of the present invention, the module is arranged on the first surface of the aluminum substrate, one end of the equipotential component is connected to the negative electrode of the light source load, and the other end is connected to the second surface of the aluminum substrate.

[0010] As a further improvement of the utility model, the equipotential component comprises: a metal clip;

[0011] The metal clip comprises: a first arc-shaped connecting portion and a second arc-shaped connecting portion;

[0012] Two ends of the first arc-shaped connecting portion are respectively connected to the negative electrode of the light source load and the second arc-shaped connecting portion, and the middle portion of the first arc-shaped connecting portion is arched away from the aluminum substrate;

[0013] The second arc-shaped connecting portion has a bent portion, and the bent portion wraps around the edge of the aluminum substrate and contacts the first surface of the aluminum substrate and the second surface of the aluminum substrate.

[0014] As a further improvement of the utility model, the utility model further comprises: a filtering absorption circuit;

[0015] The filtering and absorbing circuit comprises: a capacitor;

[0016] One end of the capacitor is connected to the first surface of the aluminum substrate, and the other end of the capacitor is connected to the second surface of the aluminum substrate.

[0017] As a further improvement of the utility model, the utility model further comprises: a filtering absorption circuit;

[0018] The filtering and absorbing circuit comprises: a capacitor;

[0019] One end of the capacitor is connected to the light source load, and the other end is connected to the second surface of the aluminum substrate.

[0020] As a further improvement of the present invention, the switch control circuit comprises:

[0021] Power management chip, sampling branch, feedback branch, energy storage branch, diode;

[0022] The power management chip is connected to the π-type filter circuit, the power management chip is grounded through the sampling branch, the power management chip is grounded through the feedback branch, the power management chip is connected to the negative electrode of the light source load through the energy storage branch, and the power management chip is connected to the positive electrode of the light source load through the diode.

[0023] As a further improvement of the utility model, the utility model further comprises: an output filter circuit and a protection circuit;

[0024] The output filter circuit is connected in parallel at both ends of the light source load;

[0025] The protection circuit is connected in parallel at both ends of the light source load.

[0026] As a further improvement of the utility model, the π-type filter circuit comprises: a first polarity capacitor, a second polarity capacitor and a first inductor;

[0027] The positive output terminal of the rectifier circuit is connected to the π-type filter circuit through the first inductor;

[0028] The negative output terminal of the rectifier circuit is connected to the positive output terminal of the rectifier circuit through the first polarity capacitor;

[0029] The first polarity capacitor and the second polarity capacitor are connected in parallel.

[0030] As a further improvement of the utility model, the utility model further includes: an input protection circuit connected between the rectifier circuit and the AC power.

[0031] In addition, the utility model also provides a lamp, comprising the above-mentioned module.

[0032] Compared with the prior art, the beneficial effects of the utility model are as follows: by setting equipotential components, the light source load and the aluminum substrate are at the same potential, thereby solving the problem of poor electromagnetic compatibility caused by the potential of the substrate changing with the voltage jump of the circuit layer in the module in which the light source load and the driving power supply are integrated on the aluminum substrate. At the same time, there is no need to set a through hole on the aluminum substrate, and mechanical processing is eliminated. The integrated design of the light source load and the driving power supply can also solve the problem of poor electromagnetic compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a schematic diagram of the overall structure of the module described in Example 1;

[0035] Figure 2 This is a schematic diagram of the structure of the equipotential component described in Example 1;

[0036] Figure 3 Schematic diagram of the connection between the capacitor and the aluminum substrate in Example 1;

[0037] Figure 4 This is a schematic diagram of the overall structure of the module described in Example 2.

[0038] Figure numerals: 1. Rectification circuit; 2. π-type filter circuit; 3. Switch control circuit; 4. Light source load; 5. Equipotential component; 51. Metal clip; 511. First arc-shaped connecting portion; 512. Second arc-shaped connecting portion; 5121. Bend portion; 6. Filter absorption circuit; 7. Output filter circuit; 8. Protection circuit; 9. Input protection circuit; 100. Aluminum substrate. DETAILED DESCRIPTION

[0039] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0040] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0041] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0042] Example 1

[0043] This embodiment provides a module integrating a light source load 4 and a driving power supply, such as Figure 1 As shown, the module is arranged on an aluminum substrate 100, and the aluminum substrate 100 serves as a heat dissipation medium for the light source load 4. The module includes: a rectifier circuit 1, a π-type filter circuit 2, a switch control circuit 3, a light source load 4, and an equipotential component 5; the input end of the rectifier circuit 1 is connected to the AC power, and the output end is connected to the π-type filter circuit 2; the input end of the switch control circuit 3 is connected to the π-type filter circuit 2, and the output end is connected to the light source load 4; the light source load 4 is connected to the aluminum substrate 100 through the equipotential component 5.

[0044] Preferably, the rectifier circuit 1 can be implemented by using a bridge stack DB1.

[0045] The module is arranged on the first surface of the aluminum substrate 100 , one end of the equipotential component 5 is connected to the negative electrode of the light source load 4 , and the other end is connected to the second surface of the aluminum substrate 100 , which is the bottom layer PE of the aluminum substrate 100 .

[0046] Exemplarily, the equipotential component 5 may be connected to the light source load 4 via a pad of the light source load 4 .

[0047] like Figure 2As shown, the equipotential component 5 includes: a metal clip 51; the metal clip 51 includes: a first arc-shaped connecting portion 511 and a second arc-shaped connecting portion 512; the two ends of the first arc-shaped connecting portion 511 are respectively connected to the negative electrode of the light source load 4 and the second arc-shaped connecting portion 512, and the middle of the first arc-shaped connecting portion 511 is arched away from the aluminum substrate 100; the second arc-shaped connecting portion 512 has a bending portion 5121, and the bending portion 5121 is wrapped around the edge of the aluminum substrate 100 and contacts the first surface of the aluminum substrate 100 and the second surface of the aluminum substrate 100. The first arc-shaped connecting portion 511 and the second arc-shaped connecting portion 512 form a clip shape to clamp the aluminum substrate 100.

[0048] The π-type filter circuit 2 includes: a first polarity capacitor EC1, a second polarity capacitor EC2 and a first inductor L1; the positive output end of the rectifier circuit 1 is connected to the π-type filter circuit 2 through the first inductor L1; the negative output end of the rectifier circuit 1 is connected to the positive output end of the rectifier circuit 1 through the first polarity capacitor EC1; the first polarity capacitor EC1 and the second polarity capacitor EC2 are connected in parallel, wherein the first inductor L1 is an I-shaped inductor.

[0049] Further, the switch control circuit 3 includes: a power management chip U1, a sampling branch, a feedback branch, an energy storage branch, and a diode; the power management chip is connected to the π-type filter circuit 2, the power management chip is grounded through the sampling branch, the power management chip is grounded through the feedback branch, the power management chip is connected to the negative electrode of the light source load 4 through the energy storage branch, and the power management chip is connected to the positive electrode of the light source load 4 through the diode. The working principle of the switch control circuit 3 can be found in the prior art.

[0050] Specifically, the sampling branch includes: a first resistor R1 and a second resistor R2 arranged in parallel; the feedback branch includes: a third resistor R3; and the energy storage branch includes: a second inductor L2, wherein the second inductor L2 is a power inductor.

[0051] like Figure 3 As shown, this embodiment also includes: a filter absorption circuit 6; the filter absorption circuit 6 includes: a capacitor; one end of the capacitor Y1 is connected to the first surface of the aluminum substrate 100, and the other end is connected to the second surface of the aluminum substrate 100.

[0052] Furthermore, this embodiment further includes: an output filter circuit 7 and a protection circuit 8 ; the output filter circuit 7 is connected in parallel to both ends of the light source load 4 ; the protection circuit 8 is connected in parallel to both ends of the light source load 4 .

[0053] In order to prevent the rectifier circuit 1 from being damaged due to a failure of the mains, the present embodiment further includes: an input protection circuit 98 connected between the rectifier circuit 1 and the mains. The input protection circuit 98 can be implemented by a fuse FR1.

[0054] Next, this embodiment is further explained in conjunction with the specific implementation process, as follows:

[0055] The AC mains input is rectified by the bridge DB1 (AC-DC), filtered by the first inductor L1 and the first polarity capacitor EC1 and the second polarity capacitor EC2 into pulsating DC, and then supplies power to the switch control circuit 3. The light source load 4 is powered normally after the voltage is stepped down by the power management chip U1. The π-type filter circuit 2 filters out most of the electromagnetic interference; the voltage is taken from the negative pole of the circuit (i.e., the LED light source), and connected to the bottom layer of the substrate using the metal clip 51, so that the aluminum substrate 100 is at the same voltage as the negative pole of the module circuit; the capacitor Y1 is connected across the negative pole of the rectifier circuit 1 to the bottom layer PE of the aluminum substrate 100, absorbing the high-frequency interference of the bottom layer PE, thereby passing the EMC test.

[0056] The module of this embodiment adopts an integrated design of high-efficiency switch control circuit and light source, and the electromagnetic compatibility circuit uses electrolytic and inductor, and uses metal clips to clamp the welding pad of the light source load and the bottom PE of the aluminum substrate. In addition, capacitor Y1 is connected across the negative pole of the rectifier circuit to the bottom PE of the aluminum substrate, which can improve the high-light-efficiency electromagnetic performance. This embodiment can realize the integration of switching power supply and light source, and also solve the problem of poor electromagnetic compatibility.

[0057] Example 2

[0058] This embodiment provides another module integrating a light source load 4 and a driving power supply, which is suitable for the case where the lamp has a metal shell. The difference between this embodiment and the first embodiment is that the position of the capacitor in the filter absorption circuit 6 is different.

[0059] In this embodiment, one end of the capacitor is connected to the positive electrode of the light source load 4, and the other end is connected to the second surface of the aluminum substrate 100. Based on this, the high-light-efficiency electromagnetic performance can be improved, and the voltage resistance problem required by a type of lamp can also be solved.

[0060] For other implementation processes of this embodiment, please refer to Embodiment 1, which will not be described in detail here.

[0061] Example 3

[0062] This embodiment provides a lamp, including the module of Embodiment 1 or Embodiment 2. For the specific implementation of this embodiment, please refer to Embodiment 1 or Embodiment 2 and the prior art, which will not be described in detail here.

[0063] In summary, the utility model has the following beneficial effects:

[0064] 1. The integration of electric light source load and driving power supply can save the volume of lamp body and the welding cost of driving power supply and light source load.

[0065] 2. Non-isolated switching power supply integrated linear power supply has high efficiency, low temperature and wide input adjustment range.

[0066] 3. The module takes power from the negative pole of the LED, and uses a metal clip to connect to the bottom PE of the aluminum substrate through a solder pad, so that the aluminum substrate and the negative pole of the light source load have the same potential. Capacitor Y1 is connected across the negative pole of the rectifier circuit to the bottom PE of the substrate to absorb the high-frequency interference of the bottom PE, solving the problem of poor electromagnetic compatibility caused by the potential of the aluminum substrate changing with the voltage jump of the circuit layer in the module where the light source and the switching drive power supply are integrated on the aluminum substrate.

[0067] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A module integrating a light source load and a driving power supply, characterized in that: The module is arranged on an aluminum substrate, and comprises: a rectifier circuit, a π-type filter circuit, a switch control circuit, a light source load, and an equipotential component; The input end of the rectifier circuit is connected to the mains, and the output end is connected to the π-type filter circuit; The input end of the switch control circuit is connected to the π-type filter circuit, and the output end is connected to the light source load; The light source load is connected to the aluminum substrate through the equipotential component.

2. The module according to claim 1, characterized in that: The module is arranged on the first surface of the aluminum substrate, one end of the equipotential component is connected to the negative electrode of the light source load, and the other end is connected to the second surface of the aluminum substrate.

3. The module according to claim 2, characterized in that: The equipotential component comprises: a metal clip; The metal clip comprises: a first arc-shaped connecting portion and a second arc-shaped connecting portion; Two ends of the first arc-shaped connecting portion are respectively connected to the negative electrode of the light source load and the second arc-shaped connecting portion, and the middle portion of the first arc-shaped connecting portion is arched away from the aluminum substrate; The second arc-shaped connecting portion has a bent portion, and the bent portion wraps around the edge of the aluminum substrate and contacts the first surface of the aluminum substrate and the second surface of the aluminum substrate.

4. The module according to claim 2, characterized in that: Also includes: Filter absorption circuit; The filtering and absorbing circuit comprises: a capacitor; One end of the capacitor is connected to the first surface of the aluminum substrate, and the other end of the capacitor is connected to the second surface of the aluminum substrate.

5. The module according to claim 2, characterized in that: Also includes: Filter absorption circuit; The filtering and absorbing circuit comprises: a capacitor; One end of the capacitor is connected to the light source load, and the other end is connected to the second surface of the aluminum substrate.

6. The module according to claim 1, characterized in that: The switch control circuit comprises: Power management chip, sampling branch, feedback branch, energy storage branch, diode; The power management chip is connected to the π-type filter circuit, the power management chip is grounded through the sampling branch, the power management chip is grounded through the feedback branch, the power management chip is connected to the negative electrode of the light source load through the energy storage branch, and the power management chip is connected to the positive electrode of the light source load through the diode.

7. The module according to claim 1, characterized in that: Also includes: Output filter circuit and protection circuit; The output filter circuit is connected in parallel at both ends of the light source load; The protection circuit is connected in parallel at both ends of the light source load.

8. The module according to claim 1, characterized in that: The π-type filter circuit comprises: a first polarity capacitor, a second polarity capacitor and a first inductor; The positive output terminal of the rectifier circuit is connected to the π-type filter circuit through the first inductor; The negative output terminal of the rectifier circuit is connected to the positive output terminal of the rectifier circuit through the first polarity capacitor; The first polarity capacitor and the second polarity capacitor are connected in parallel.

9. The module according to claim 1, characterized in that: Also includes: An input protection circuit is connected between the rectifier circuit and the commercial power supply.

10. A lamp, characterized in that: The invention comprises a module as claimed in any one of claims 1 to 9.

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