Surge suppression filter module and electronic equipment

Abstract

The present application provides a surge suppression filter module and an electronic device, wherein the surge suppression filter module includes a housing, a plurality of guide pins, a control mainboard, an NMOS tube, a power filter and a transient diode. The present application utilizes the characteristics of the NMOS tube such as small on-resistance, large operating current and low heat generation, so that the surge suppression filter module is not easy to generate heat during operation, and the rated current of the surge suppression filter module can be increased, thereby meeting the requirements of low DC resistance and high rated current of the surge suppression filter module, thereby suppressing the surge current and surge voltage generated when the power is turned on; the power filter can effectively filter out the frequency point of a specific frequency in the power line or the frequency other than the frequency point, thereby suppressing the electromagnetic interference signal in the surge suppression filter module; when the power is turned off, the transient diode can be used to change the high impedance into a low impedance, absorbing the peak voltage, thereby suppressing the peak voltage in the surge suppression filter module.

Description

Technical Field

[0001] The present application belongs to the field of electronic communication technology, and more specifically, relates to a surge suppression filter module and an electronic device using the surge suppression filter module. Background Art

[0002] The switching power supply controls the switching tube through the circuit to conduct and cut off at high speed, converting direct current into high-frequency alternating current and providing it to the transformer for transformation, thereby generating one or more required voltages.

[0003] At present, the switching power supply draws a large surge current at the moment of power-on, which can reach 10 to 100 times the static working current of the power supply. The surge current is accompanied by a strong electromagnetic interference signal, which will cause serious interference to the circuit. Moreover, the reverse peak voltage generated by the switching power supply when it turns from on to off can reach 2 times or more of the platform voltage, which seriously affects the use and life of the switching power supply. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a surge suppression filter module and an electronic device to solve the problems existing in the related art that the switching power supply has a large surge current when it is turned on, a strong electromagnetic interference signal, and a large peak voltage when it is turned off, which affects its use and life.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0006] On the one hand, a surge suppression filter module is provided, comprising a shell, a plurality of guide pins, a control mainboard installed in the shell, an NMOS tube for suppressing surge current generated when power is turned on after being turned on, a power filter for suppressing electromagnetic interference signals generated when power is turned on after being turned on, and a transient diode for suppressing peak voltage generated when power is disconnected when being turned off; one end of each of the guide pins is electrically connected to the control mainboard, and the other end of each of the guide pins extends out of the shell; the NMOS tube, the power filter and the transient diode are respectively installed on the control mainboard, and the NMOS tube, the power filter and the transient diode are respectively electrically connected to the control mainboard.

[0007] In one embodiment, the NMOS tube, the power filter and the transient diode are potted in the housing by potting glue.

[0008] In one embodiment, the power supply filter includes a resistor, a capacitor and an inductor respectively installed on the control main board; the resistor, the capacitor and the inductor are respectively electrically connected to the control main board, the resistor, the capacitor and the transient diode are spaced apart on the side of the control main board away from the guide pin, and the NMOS tube and the inductor are spaced apart on the side of the control main board facing the guide pin.

[0009] In one embodiment, the surge suppression filter module further includes a thermally conductive adhesive for bonding the NMOS tube to the corresponding inner wall of the housing.

[0010] In one embodiment, an end of the inductor away from the control mainboard is spaced apart from the thermal conductive adhesive.

[0011] In one embodiment, the shell is square, and the shell has a first direction and a second direction perpendicular to the first direction. The surge suppression filter module includes two groups of guide needle groups that are parallel to the first direction and spaced apart in the second direction, and the guide needle is arranged between the two groups of guide needle groups; each group of the guide needle groups includes two guide needles spaced apart, and the distance between the two guide needles in each group of the guide needle groups is equal.

[0012] In one embodiment, the distance between the guide needle located between two groups of the guide needle groups and one group of the guide needle groups is greater than the distance between the guide needle located between the two groups of the guide needle groups and the other group of the guide needle groups.

[0013] In one embodiment, the guide needle located between the two groups of the guide needle groups and one group of the guide needle groups enclose a first accommodation interval, and the resistor and the capacitor are arranged in the first accommodation interval; the guide needle located between the two groups of the guide needle groups and another group of the guide needle groups enclose a second accommodation interval, and the transient diode is arranged in the second accommodation interval.

[0014] In one embodiment, the housing has extension blocks installed at both ends of the side surface on which the guide needle is provided.

[0015] On the other hand, an electronic device is provided, comprising a protected circuit module and the above-mentioned surge suppression filter module, wherein the surge suppression filter module is electrically connected to the protected circuit module.

[0016] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0017] By electrically connecting the NMOS tube, the power filter and the transient diode on the control mainboard, when the NMOS tube, the power filter and the transient diode are turned on, the surge suppression filter module is not easy to generate heat during operation by utilizing the characteristics of the NMOS tube such as small on-resistance, large working current and small heat generation, and the rated current of the surge suppression filter module can be increased, thereby meeting the requirements of low DC resistance and high rated current of the surge suppression filter module, thereby suppressing the surge current and surge voltage generated when the power is turned on;

[0018] The power filter can effectively filter out the specific frequency point or the frequency other than the specific frequency point in the power line, thereby suppressing the electromagnetic interference signal in the surge suppression filter module;

[0019] When the power is turned off, the transient diode can change the high impedance into low impedance and absorb the spike voltage, thereby suppressing the spike voltage in the surge suppression filter module.

[0020] The electronic device provided in the present application adopts the above-mentioned surge suppression filter module, which can effectively suppress surge current and peak voltage, and has the advantages of low on-resistance, small slow-start current, fast recovery time, and strong anti-electromagnetic interference ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or exemplary technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic cross-sectional view of a surge suppression filter module provided in an embodiment of the present application;

[0023] Figure 2 A top view of a surge suppression filter module provided in an embodiment of the present application;

[0024] Figure 3 A side view of a surge suppression filter module provided in an embodiment of the present application;

[0025] Figure 4 This is an equivalent circuit diagram of the surge suppression filter module provided in an embodiment of the present application.

[0026] Among them, the main marks of the drawings in the figure are:

[0027] 1-housing; 11-extension block;

[0028] 2-guide needle; 21-guide needle group; 211-first left conductive needle; 212-second left conductive needle; 213-first right conductive needle; 214-second right conductive needle; 215-middle conductive needle;

[0029] 3-power filter; 31-resistance; 32-capacitance; 33-inductance;

[0030] 4-control main board; 5-NMOS tube; 6-transient diode; 7-potting glue; 8-thermal conductive glue. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0034] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In the description of this application, 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection 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 this application can be understood according to specific circumstances.

[0036] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0037] See also Figures 1 to 3 , now the surge suppression filter module provided by the present application is described. The surge suppression filter module includes a housing 1, a plurality of guide pins 2, a control mainboard 4 installed in the housing 1, an NMOS tube 5 (N-Mental-Oxide-Semiconductor), a power filter 3 and a transient diode 6. The housing 1 may include a housing with an opening at the top and a concave cavity and a cover plate covering the opening, the control mainboard 4, the NMOS tube 5, the power filter 3 and the transient diode 6 are respectively arranged in the concave cavity, and the NMOS tube 5, the power filter 3 and the transient diode 6 are respectively installed on the control mainboard 4, and the NMOS tube 5, the power filter 3 and the transient diode 6 are respectively electrically connected to the control mainboard 4. A detachable connection is formed between the housing and the cover plate, which is convenient for the maintenance and replacement of the control mainboard 4, the NMOS tube 5, the power filter 3 and the transient diode 6. In some embodiments, the housing and the cover plate may be integrally formed. The integrally formed housing 1 has excellent mechanical properties and is convenient and quick to process. One end of each guide pin 2 extends into the concave cavity and is electrically connected to the control main board 4, and the other end extends out of the cover plate. One end of each guide pin 2 can be directly welded to the control main board 4; or, each guide pin 2 and the control main board 4 are connected by a wire. The length of each guide pin 2 extending out of the housing 1 is equal.

[0038] See also Figure 4, the surge current control circuit and the surge voltage control circuit are arranged in parallel, the combination formed by the surge current control circuit and the surge voltage control circuit is arranged in series with the NMOS tube 5, the combination formed by the surge current control circuit, the surge voltage control circuit and the NMOS tube 5 is connected to the power supply circuit, and is respectively connected to the positive and negative input terminals and the positive and negative output terminals of the circuit to suppress the surge current and surge voltage in the circuit. The power supply filter 3 is respectively connected to the positive and negative input terminals and the positive and negative output terminals of the circuit to suppress the electromagnetic interference signal in the circuit. The spike voltage suppression circuit is respectively connected to the positive and negative input terminals and the positive and negative output terminals of the circuit to suppress the spike voltage in the circuit. The sampling circuit is respectively connected to the positive and negative input terminals and the positive and negative output terminals of the circuit, and the sampling circuit is connected to the surge voltage control circuit. The surge current control circuit, the combination formed by the surge voltage control circuit and the NMOS tube 5, the spike voltage suppression circuit, the sampling circuit and the power supply filter 3 are arranged in parallel in pairs.

[0039] In some embodiments, the NMOS tube 5 is a semiconductor tube with a small volume and high power. The housing 1 is made of a metal material, specifically an aluminum alloy material, which has the characteristics of good heat dissipation, lightness, etc. The guide pin 2 is cylindrical in shape, which is convenient for the insertion of the guide pin 2, has a good installation effect, and has excellent sealing performance.

[0040] This structure is electrically connected to the control mainboard 4 with an NMOS tube 5, a power filter 3 and a transient diode 6. When the NMOS tube 5, the power filter 3 and the transient diode 6 are turned on, the NMOS tube 5 has the characteristics of small on-resistance, large working current and small heat generation, so that the surge suppression filter module is not easy to generate heat during operation, and the rated current of the surge suppression filter module can be increased, thereby meeting the requirements of low DC resistance and high rated current of the surge suppression filter module, thereby suppressing the surge current and surge voltage generated when the power is turned on;

[0041] The power filter 3 can effectively filter out the frequency point of a specific frequency in the power line or the frequency other than the frequency point, thereby suppressing the electromagnetic interference signal in the surge suppression filter module;

[0042] When the power is turned off, the transient diode 6 can be used to change the high impedance into a low impedance, absorbing the peak voltage, thereby suppressing the peak voltage in the surge suppression filter module.

[0043] In one embodiment, see Figure 1As a specific implementation of the surge suppression filter module provided in the present application, the NMOS tube 5, the power filter 3 and the transient diode 6 are potted in the housing 1 by potting glue 7. The potting glue 7 is an epoxy resin sealant with vibration resistance and impact resistance, and has a certain thermal conductivity. Here, the potting glue 7 can be 5180A / B glue. The use of 5180A / B glue for potting can improve the installation stability of the control mainboard 4, the NMOS tube 5, the power filter 3, the transient diode 6 and each guide pin 2, thereby improving the vibration resistance and impact resistance of the surge suppression filter module, thereby meeting military requirements. In other embodiments, the potting glue 7 can also be a sealant of other materials, such as silicone resin sealant or polyurethane sealant, etc., which is not limited here.

[0044] In one embodiment, see Figure 1 As a specific embodiment of the surge suppression filter module provided by the present application, the power filter 3 includes a resistor 31, a capacitor 32 and an inductor 33 respectively installed on the control mainboard 4; the resistor 31, the capacitor 32 and the inductor 33 are respectively electrically connected to the control mainboard 4, the resistor 31, the capacitor 32 and the transient diode 6 are arranged at intervals on the side of the control mainboard 4 away from the guide pin 2, and the NMOS tube 5 and the inductor 33 are arranged at intervals on the side of the control mainboard 4 facing the guide pin 2. In this structure, the resistor 31, the capacitor 32, the inductor 33, the NMOS tube 5 and the transient diode 6 are arranged at intervals on the control mainboard 4, respectively, which can avoid mutual interference between the components, help the heat dissipation between the components, and thus improve the reliability of the operation of the surge suppression filter module. In other embodiments, the installation positions of the resistor 31, the capacitor 32, the inductor 33, the NMOS tube 5 and the transient diode 6 can be adjusted according to actual needs, and are not limited here.

[0045] In one embodiment, the volume of the NMOS tube 5, the volume of the inductor 33, the volume of the transient diode 6, the volume of the capacitor 32, and the volume of the resistor 31 are arranged in descending order. The resistor 31, the capacitor 32, and the transient diode 6 have the same height; the distance between the resistor 31 and the capacitor 32 is smaller than the distance between the capacitor 32 and the transient diode 6.

[0046] In one embodiment, the resistor 31 and the capacitor 32 are located directly above the NMOS tube 5, the transient diode 6 is located above the inductor 33, and one end of the transient diode 6 close to the capacitor 32 extends out of the inductor 33. In this structure, the greater the impedance adaptation between the input and output sides of the power filter 3 and the power supply and load sides, the more effective the attenuation of electromagnetic interference is, and the stronger the ability to suppress electromagnetic interference signals is.

[0047] In one embodiment, the distance between the control mainboard 4 and the top surface of the housing 1 is smaller than the distance between the control mainboard 4 and the bottom surface of the housing 1. The resistor 31, the capacitor 32 and the transient diode 6 are arranged between the control mainboard 4 and the top surface of the housing 1, and the NMOS tube 5 and the inductor 33 are arranged between the control mainboard 4 and the bottom surface of the housing, so as to provide sufficient space for the heat dissipation of the NMOS tube 5 and the inductor 33.

[0048] In one embodiment, see Figure 1 As a specific embodiment of the surge suppression filter module provided by the present application, the surge suppression filter module also includes a thermally conductive adhesive 8 for bonding the NMOS tube 5 to the corresponding inner wall of the housing 1. The thermally conductive adhesive 8 is arranged between the NMOS tube 5 and the inner wall at the bottom of the housing 1, and one side of the thermally conductive adhesive 8 is bonded to the corresponding surface of the NMOS tube 5, and the other side is bonded to the inner wall at the bottom of the housing 1. Among them, the NMOS tube 5 is an enhanced N-channel MOS tube (Mental-Oxide-Semiconductor). The thermally conductive adhesive 8 is a thermally conductive double-sided adhesive, which can be composed of acrylic polymer filled with thermally conductive ceramic powder and organic silicone adhesive. It has the characteristics of high thermal conductivity and insulation, and has the characteristics of softness, compressibility, compliance, strong viscosity, etc.; it has a wide temperature range, can fill uneven surfaces, can fit the heat source device and the heat sink tightly and firmly, and quickly conduct heat away. In this structure, the housing 1 is connected to the NMOS tube 5 by the thermally conductive adhesive 8, which can improve the heat dissipation capacity of the NMOS tube 5. The NMOS tube 5 can use a device with an operating temperature range of -55°C to 175°C, and the operating temperature range of the surge suppression filter module can be -55°C to 85°C, meeting the requirements for military use. The surge suppression filter module can achieve the requirements of a wide operating temperature range, while enhancing the reliability of the surge suppression filter module to meet military requirements: it also meets the test requirements of SJ20668-1998, GJB1518A-2015, GJB181-86, GJB360B and GJB548B.

[0049] In one embodiment, the filling operation of the potting glue 7 can be divided into two steps. The first filling is performed to pot half of the housing 1; then the second filling is performed to pot the entire housing 1. Through the two potting operations, the air inside the housing 1 can be discharged as much as possible, and the installation stability of each component inside the housing 1 can be improved, thereby improving the vibration and impact resistance of the surge suppression filter module. In other embodiments, the filling operation of the potting glue 7 can also be divided into multiple steps and performed separately. The principle is similar to the two potting operations, and is not limited here.

[0050] In the above two filling operations, the type of potting glue 7 filled each time can be different. For example, the first filling is 5180A / B potting glue 7, and the second filling can be silicone resin potting glue 7. Different types of potting glue 7 can effectively enhance the vibration and impact resistance of the surge suppression filter module. In other embodiments, the type and amount of potting glue 7 filled each time can be adjusted according to actual needs, and are not limited here. For example, the amount of potting glue 7 filled for the first time is one third, and the amount of potting glue 7 filled for the second time is two thirds; the amount of potting glue 7 filled for the first time is one third, and the amount of potting glue 7 filled for the second time is one third, and the amount of potting glue 7 filled for the third time is one third, etc.

[0051] In the above filling operation, it is not limited to filling from the top of the shell 1, and it can also be filled from the bottom of the shell 1 or other positions, which can more effectively discharge the air inside the shell 1, help to improve the installation stability of each component inside the shell 1, thereby improving the vibration and impact resistance of the surge suppression filter module.

[0052] The steps for making the surge suppression filter module are as follows:

[0053] 1. Solder the NMOS tube 5, the power filter 3, the transient diode 6 and each guide pin 2 to the control main board 4 respectively;

[0054] 2. Apply thermal conductive adhesive 8 on the inner wall of the bottom of the housing 1, and bond the NMOS tube 5 to the thermal conductive adhesive 8;

[0055] 3. Fill the potting glue 7 from the open end of the shell 1 to pot the control mainboard 4, NMOS tube 5, power filter 3 and transient diode 6 in the shell 1. One end of each guide pin 2 is fixed in the shell 1, and the other end extends out of the shell 1.

[0056] In one embodiment, see Figure 1 As a specific implementation of the surge suppression filter module provided by the present application, the end of the inductor 33 away from the control mainboard 4 is spaced apart from the thermal conductive adhesive 8. In this structure, the thickness of the NMOS tube 5 is greater than the thickness of the inductor 33. Since the heat generated by the inductor 33 is less than the heat generated by the NMOS tube 5, the heat of the inductor 33 can be directly transferred to the housing 1 by the thermal conductive potting adhesive 7, which can prevent the heat of the NMOS tube 5 from being transferred to the inductor 33 and affecting the inductor 33.

[0057] In one embodiment, see Figure 2 and Figure 3As a specific embodiment of the surge suppression filter module provided by the present application, the shell 1 is square, and the shell 1 has a first direction and a second direction perpendicular to the first direction. The surge suppression filter module includes two groups of guide needle groups 21 that are parallel to the first direction and spaced apart in the second direction, and a guide needle 2 arranged between the two groups of guide needle groups 21; each group of guide needle groups 21 includes two guide needles 2 spaced apart, and the distance between the two guide needles 2 in each group of guide needle groups 21 is equal. Specifically, the shell 1 is a rectangular parallelepiped configuration, with two short sides parallel to the first direction and two long sides parallel to the second direction, and the connection between each short side and the corresponding long side is an arc chamfered structure. The first direction is defined as the width direction of the shell 1 ( Figure 2 The second direction is defined as the length direction of the housing 1 ( Figure 2 The number of guide needles 2 may be five, divided into two groups, one guide needle group 21 includes two guide needles 2, and a single guide needle 2 is arranged between the two guide needle groups 21. The two guide needles 2 in each guide needle group 21 are arranged at intervals along the first direction, and the distance between the two guide needles 2 in each guide needle group 21 is D. This structure, through the two guide needle groups 21 and the guide needles 2 arranged between the two guide needle groups 21, can facilitate the electrical connection between the surge suppression filter module and the electronic device. In other embodiments, the number and installation position of the guide needles 2 can be adjusted according to actual needs, and are not limited to this.

[0058] See also Figure 2 For the convenience of description, the two guide pins 2 in one guide pin group 21 are respectively referred to as the first left conductive pin 211 and the second left conductive pin 212; the two guide pins 2 in another guide pin group 21 are respectively referred to as the first right conductive pin 213 and the second right conductive pin 214; the guide pin 2 located between the two guide pin groups 21 is referred to as the middle conductive pin 215. In one embodiment, the first left conductive pin 211 is respectively equal to the distance between the corresponding long side and the corresponding short side; the second left conductive pin 212 is respectively equal to the distance between the corresponding long side and the corresponding short side; the first right conductive pin 213 is respectively equal to the distance between the corresponding long side and the corresponding short side; the second right conductive pin 214 is respectively equal to the distance between the corresponding long side and the corresponding short side. The two guide pin groups 21 are symmetrically distributed with respect to the central axis of the housing 1.

[0059] In one embodiment, the first left conductive needle 211, the second left conductive needle 212, the first right conductive needle 213 and the second right conductive needle 214 are respectively arranged at corresponding arc chamfered positions. The straight line where the first left conductive needle 211 and the first right conductive needle 213 are located is parallel to the straight line where the second left conductive needle 212 and the second right conductive needle 214 are located. The middle conductive needle 215 is located on the straight line where the second left conductive needle 212 and the second right conductive needle 214 are located. In this structure, the housing 1 is designed to be square, which is convenient for the installation and layout of various components, and the volume of the surge suppression filter module can be miniaturized; by setting the arc chamfer, the heat dissipation area of ​​the surge suppression filter module can be increased, thereby improving the heat dissipation effect, and can also avoid the safety hazards caused by sharp corners, thereby improving the safety of the use of the surge suppression filter module. In other embodiments, the shape and size of the housing 1 can also be adjusted according to actual needs, and it is not limited here.

[0060] In one embodiment, see Figure 2 As a specific embodiment of the surge suppression filter module provided by the present application, the distance between the guide needle 2 located between the two guide needle groups 21 and one guide needle group 21 is greater than the distance between the guide needle 2 located between the two guide needle groups 21 and the other guide needle group 21. Specifically, the distance between the second left conductive needle 212 and the middle conductive needle 215 is less than the distance between the second right conductive needle 214 and the middle conductive needle 215. This structure can enhance the suppression effect on surge current and also improve the suppression effect on electromagnetic interference signals, and can realize the small slow start current and large current application of the surge suppression filter module, as well as the requirements for suppressing electromagnetic interference signals and peak voltages.

[0061] In one embodiment, see Figure 1 and Figure 2 As a specific implementation of the surge suppression filter module provided by the present application, the guide needle 2 located between the two guide needle groups 21 and one guide needle group 21 enclose a first accommodation interval (not marked in the figure), and the resistor 31 and the capacitor 32 are arranged in the first accommodation interval; the guide needle 2 located between the two guide needle groups 21 and the other guide needle group 21 enclose a second accommodation interval (not marked in the figure), and the transient diode 6 is arranged in the second accommodation interval. This structure, by arranging the resistor 31 and the capacitor 32 in the first accommodation interval and the transient diode 6 in the second accommodation interval, reduces the electromagnetic interference between the components, helps to improve the anti-electromagnetic interference capability of the surge suppression filter module, as well as the capability of suppressing surge current and suppressing peak voltage; moreover, it helps to dissipate heat, increase the operating temperature range of the surge suppression filter module, and improve its wide adaptability.

[0062] In one embodiment, see Figures 1 to 3As a specific embodiment of the surge suppression filter module provided by the present application, the shell 1 is provided with extension blocks 11 installed at both ends of the side surface of the guide pin 2. Specifically, one of the extension blocks 11 is arranged between the first left conductive pin 211 and the second left conductive pin 212, and the distance between the extension block 11 and the first left conductive pin 211 is equal to the distance between the extension block 11 and the second left conductive pin 212; the other extension block 11 is arranged between the first right conductive pin 213 and the second right conductive pin 214, and the distance between the extension block 11 and the first right conductive pin 213 is equal to the distance between the extension block 11 and the second right conductive pin 214. In this structure, the extension blocks 11 are respectively arranged at both ends of the bottom surface of the shell 1, which facilitates the connection between the shell 1 and other devices and the installation and fixation of the surge suppression filter module. In some embodiments, the extension block 11 and the shell 1 are integrally formed, with excellent mechanical properties, which helps to improve the vibration and impact resistance of the surge suppression filter module; the processing and manufacturing are convenient and quick.

[0063] Please also read Figure 2 and Figure 3 The dimensions of the surge suppression filter module are shown in the following table.

[0064]

[0065] The units of the parameters in the above table are all in millimeters (mm). It can be seen from the above table that the surge suppression filter module meets the miniaturization requirements of small volume of military equipment. In other embodiments, the size of the surge suppression filter module can also be adjusted according to actual needs, which is not the only limitation here.

[0066] The present application also provides an electronic device, including a protected circuit module and the above-mentioned surge suppression filter module, wherein the protected circuit module is electrically connected to the surge suppression filter module. With this structure, the electronic device adopts the above-mentioned surge suppression filter module, which can effectively suppress surge current and peak voltage, and has the advantages of low on-resistance, small slow start current, fast recovery time, strong anti-electromagnetic interference ability, etc.

[0067] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. Surge suppression filter module, Features: The invention comprises a housing, a plurality of guide pins, a control mainboard installed in the housing, an NMOS tube for suppressing the surge current generated when the power is turned on after being turned on, a power filter for suppressing the electromagnetic interference signal generated when the power is turned on after being turned on, and a transient diode for suppressing the peak voltage generated when the power is disconnected when being turned off; one end of each of the guide pins is electrically connected to the control mainboard, and the other end of each of the guide pins extends out of the housing; The NMOS tube, the power filter and the transient diode are respectively installed on the control mainboard, and the NMOS tube, the power filter and the transient diode are respectively electrically connected to the control mainboard; the surge current control circuit and the surge voltage control circuit are arranged in parallel, and the combination formed by the surge current control circuit and the surge voltage control circuit is arranged in series with the NMOS tube, and the combination formed by the surge current control circuit, the surge voltage control circuit and the NMOS tube is connected to the power circuit, and is respectively connected to the positive and negative input terminals and the positive and negative output terminals of the circuit to suppress the surge current and surge voltage in the circuit; The power filter is connected to the positive and negative input terminals and the positive and negative output terminals of the circuit respectively, and can suppress the electromagnetic interference signal in the circuit; the peak voltage suppression circuit is connected to the positive and negative input terminals and the positive and negative output terminals of the circuit respectively, and can suppress the peak voltage in the circuit; the sampling circuit is connected to the positive and negative input terminals and the positive and negative output terminals of the circuit respectively, and the sampling circuit is connected to the surge voltage control circuit; the combination formed by the surge current control circuit, the surge voltage control circuit and the NMOS tube, the peak voltage suppression circuit, the sampling circuit and the power filter are arranged in parallel in pairs; the NMOS tube adopts a small-volume and high-power semiconductor tube.

2. The surge suppression filter module according to claim 1, Features: The NMOS tube, the power filter and the transient diode are potted in the housing by potting glue.

3. The surge suppression filter module according to claim 1, Features: The power supply filter includes a resistor, a capacitor and an inductor respectively installed on the control main board; the resistor, the capacitor and the inductor are respectively electrically connected to the control main board, the resistor, the capacitor and the transient diode are spaced apart on the side of the control main board away from the guide pin, and the NMOS tube and the inductor are spaced apart on the side of the control main board facing the guide pin.

4. The surge suppression filter module according to claim 3, Features: The surge suppression filter module also includes a heat conductive adhesive for bonding the NMOS tube to the corresponding inner wall of the housing.

5. The surge suppression filter module according to claim 4, Features: One end of the inductor away from the control mainboard is spaced apart from the thermal conductive adhesive.

6. The surge suppression filter module according to claim 3, Features: The shell is square, and has a first direction and a second direction perpendicular to the first direction. The surge suppression filter module includes two groups of guide needle groups that are parallel to the first direction and spaced apart in the second direction, and the guide needles arranged between the two groups of guide needle groups; each group of the guide needle groups includes two guide needles spaced apart, and the distance between the two guide needles in each group of the guide needle groups is equal.

7. The surge suppression filter module according to claim 6, Features: The distance between the guide needle located between the two guide needle groups and one guide needle group is greater than the distance between the guide needle located between the two guide needle groups and the other guide needle group.

8. The surge suppression filter module according to claim 6, Features: The guide needle located between the two groups of the guide needle groups and one group of the guide needle groups form a first accommodation interval, and the resistor and the capacitor are arranged in the first accommodation interval; the guide needle located between the two groups of the guide needle groups and another group of the guide needle groups form a second accommodation interval, and the transient diode is arranged in the second accommodation interval.

9. The surge suppression filter module according to any one of claims 1 to 8, Features: The two ends of the side surface of the housing on which the guide needle is provided are respectively equipped with extension blocks.

10. Electronic equipment, including protected circuit modules, Features: The electronic device further comprises a surge suppression filter module as claimed in any one of claims 1 to 9, and the surge suppression filter module is electrically connected to the protected circuit module.

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