WO2023210499A1 - 回路装置、およびフィルタ回路 - Google Patents

回路装置、およびフィルタ回路 Download PDF

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Publication number
WO2023210499A1
WO2023210499A1 PCT/JP2023/015779 JP2023015779W WO2023210499A1 WO 2023210499 A1 WO2023210499 A1 WO 2023210499A1 JP 2023015779 W JP2023015779 W JP 2023015779W WO 2023210499 A1 WO2023210499 A1 WO 2023210499A1
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WIPO (PCT)
Prior art keywords
coil
terminal
wiring
circuit device
coil component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/015779
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English (en)
French (fr)
Japanese (ja)
Inventor
淳 東條
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Publication date
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Priority to CN202390000246.1U priority Critical patent/CN222928375U/zh
Priority to JP2024517262A priority patent/JP7673872B2/ja
Publication of WO2023210499A1 publication Critical patent/WO2023210499A1/ja
Priority to US18/822,788 priority patent/US20240428985A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/09—Filters comprising mutual inductance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F19/00—Fixed transformers or mutual inductances of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F27/292—Surface mounted devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof
    • H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
    • H01F27/325—Coil bobbins
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components

Definitions

  • the present disclosure relates to a circuit device mounting coil components and a filter circuit.
  • Filter circuits used for noise countermeasures include, for example, EMI (Electro-Magnetic Interference) removal filters, which use capacitors as capacitance elements. Therefore, it is known that the noise suppression effect of the filter circuit decreases due to the equivalent series inductance (ESL), which is the parasitic inductance of the capacitor.
  • ESL equivalent series inductance
  • the direction of the current flowing through the two coils that are magnetically coupled must be in the same direction.
  • two wires wound in the same direction are used, as in the structure of a general transformer coil or common mode choke coil (CMCC). If terminals of the same flange are electrically connected to each other to form an intermediate terminal, the direction of current will be reversed and negative inductance will not be obtained.
  • CMCC common mode choke coil
  • the coil component in which the intermediate terminals are formed on the same flange must be formed by winding the wire around the bobbin from the input terminal to the intermediate terminal, and then changing the settings and winding the wire around the bobbin from the intermediate terminal to the output terminal.
  • the manufacturing cost increases.
  • an object of the present disclosure is to provide a circuit device and a filter circuit that can realize a filter circuit using coil components that have low manufacturing costs and stable mutual inductance.
  • a circuit device includes a coil component and a substrate on which the coil component is mounted.
  • the coil component includes a first coil, a second coil whose opening overlaps with the first coil when viewed from the opening direction of the first coil, a first terminal connected to one end of the first coil, and the first coil. , a third terminal connected to one end of the second coil, and a fourth terminal connected to the other end of the second coil.
  • the direction of the magnetic field generated in the first coil when current flows from the first terminal to the second terminal is the same as the direction of the magnetic field generated in the second coil when current flows from the third terminal to the fourth terminal.
  • the board includes a first wiring electrically connected to the first terminal, a second wiring electrically connected to the fourth terminal, and a third wiring electrically connected to the second terminal and the third terminal. and, including.
  • the third wiring is also electrically connected to the capacitor.
  • a filter circuit includes the above circuit device and the capacitor electrically connected to the third wiring of the circuit device.
  • the manufacturing cost is reduced because the third wiring is electrically connected to the second terminal and the third terminal of the coil component, and the third wiring is also electrically connected to the capacitor.
  • a filter circuit using coil components with low and stable mutual inductance can be realized.
  • FIG. 1 is a plan view of a circuit device according to Embodiment 1.
  • FIG. 1 is a perspective view of a coil component according to Embodiment 1.
  • FIG. 1 is a circuit diagram of a filter circuit according to Embodiment 1.
  • FIG. 7 is a plan view of a circuit device according to modification 1-1.
  • FIG. 7 is a plan view of a circuit device according to modification example 1-2.
  • FIG. 7 is a perspective view of a circuit device according to modification 2.
  • FIG. FIG. 7 is a perspective view of a coil component according to modification example 3.
  • FIG. 7 is a side view of a coil component according to modification example 3.
  • FIG. 3 is a plan view of a circuit device according to a second embodiment.
  • FIG. 3 is a perspective view of a coil component according to a second embodiment.
  • FIG. 1 is a plan view of a circuit device 10 according to the first embodiment.
  • the circuit device 10 is, for example, a filter circuit used for noise countermeasures on the power lines 8a and 8b, and includes a coil component 1 including two magnetically coupled coils to cancel the parasitic inductance of the capacitor C1.
  • the circuit device 10 is not limited to a filter circuit used for noise countermeasures on the power supply lines 8a and 8b, but may be a filter circuit used for noise countermeasures on other signal lines or the like.
  • the coil component 1 mounted on the circuit device 10 is formed by winding two wires around a bobbin in the same direction, as will be described later. Therefore, compared to the case where the coil component 1 is formed by winding the wire around the bobbin so that the winding direction from the input terminal to the intermediate terminal is opposite to the winding direction from the intermediate terminal to the output terminal, the coil component 1 has two wires. Manufacturing costs are low because it can be wrapped all at once. In addition, since the coil component 1 has two wires wound around the bobbin in the same direction, it is relatively easy to keep the coil spacing constant, and mutual inductance is stabilized. Although the coil component 1 will be described as an example of a wire-wound coil in which wire is wound around a bobbin, it may be a coil component having another configuration.
  • the terminal 6a (first terminal) is connected to one end of the first wire 4, and the terminal 6a is connected to the other end of the first wire 4.
  • a terminal 6b (second terminal), a terminal 6c (third terminal) connected to one end of the second wire 5, and a terminal 6d (fourth terminal) connected to the other end of the second wire 5.
  • the coil component 1 has four terminals, terminals 6a to 6d.
  • Four terminals (terminals 6a to 6d) are provided at the four corners of the coil component 1. Note that the first wire 4 wound around the bobbin forms a first coil L1, and the second wire 5 wound around the bobbin forms a second coil L2.
  • the coil component that cancels the parasitic inductance of the capacitor only needs to have three functional terminals (an input terminal, an intermediate terminal, and an output terminal).
  • a rectangular parallelepiped shape is often adopted for ease of manufacturing, and the coil component also has a rectangular parallelepiped shape, and terminals (NC) that are not connected to others from the viewpoint of mechanical strength.
  • Non-Connection terminals are often used to provide four terminals. Even if a four-terminal coil component is formed by adding an NC terminal, only three terminals are functionally used, so when mounting the coil component on the board 60, the orientation of the coil component becomes a problem.
  • the coil component 1 has a rectangular shape when viewed from a direction perpendicular to the substrate 60.
  • the terminals 6a to 6d are provided on the same plane of the coil component 1.
  • the terminals 6a to 6d are arranged so that the direction from the terminal 6a to the terminal 6b crosses the direction from the terminal 6c to the terminal 6d.
  • a wiring pattern of power supply lines 8a, 8b is formed on the surface of a substrate 60, and the coil component 1 is mounted in series with the power supply lines 8a, 8b.
  • the power line 8a (first wiring) is provided with an electrode 7a (first electrode) that is electrically connected to the terminal 6a of the coil component 1 and for inputting current from the power line 8a to the coil component 1.
  • a terminal 6a electrically connected to the electrode 7a functions as an input terminal of the coil component 1.
  • the power line 8b (second wiring) is provided with an electrode 7d (fourth electrode) that is electrically connected to the terminal 6d of the coil component 1 and outputs a current from the coil component 1 to the power line 8b.
  • a terminal 6d electrically connected to the electrode 7d functions as an output terminal of the coil component 1.
  • the substrate 60 is formed by laminating a plurality of insulating layers, and is made of, for example, low-temperature co-fired ceramics, glass epoxy resin, or the like.
  • wiring patterns such as the power line 8a, electrodes for connecting components such as the coil component 1, and the capacitor C1 are formed, and electrode materials such as Cu, Ag, and Al are generally used for each electrode material. made of metal material.
  • a wiring pattern is formed of Cu on the glass epoxy resin, and an insulating resin is further formed on the glass epoxy resin including the wiring pattern.
  • the electrode for electrically connecting components such as the coil component 1 and the capacitor C1 to be mounted and the wiring pattern is a portion formed by removing the insulating resin on the wiring pattern.
  • the electrode formed on the wiring pattern is a place where the Cu of the wiring pattern and the terminal of the component are electrically connected, for example, by solder.
  • the capacitor C1 is connected in series to the terminals 6b and 6c that function as intermediate terminals of the coil component 1.
  • a wiring 8c (third wiring) is formed on the substrate 60 to connect in a straight line an electrode 7b (second electrode) for connecting the terminal 6b and an electrode 7c (third electrode) for connecting the terminal 6c.
  • the parasitic inductance can be reduced compared to the case where the wiring connecting to the terminal 6b and the wiring connecting to the terminal 6c are connected separately.
  • Much of the negative mutual inductance generated in the coil component 1 can be used to cancel out the parasitic inductance.
  • the parasitic inductance can be increased or decreased, so it is possible to adjust the negative mutual inductance of the entire circuit.
  • An electrode 7e (fifth electrode) for electrically connecting to the capacitor C1 is formed on the wiring 8c.
  • the shape of the wiring 8c when viewed from a direction perpendicular to the substrate 60 is T-shaped. Specifically, when viewed from a direction perpendicular to the substrate 60, the wiring 8c connects the connection point between the wiring 8c and the terminal 6b (electrode 7b) and the connection point between the wiring 8c and the terminal 6c (electrode 7c) in a straight line.
  • a T-shape is formed by the connecting portion and a portion extending from the center of the straight line connecting portion and reaching the connection point (electrode 7e) of the capacitor C1.
  • the wiring direction of the wiring 8c that connects the capacitor C1 is perpendicular to the wiring direction of the wiring 8c that connects the electrode 7b and the electrode 7c in a straight line.
  • the portion of the wiring 8c that connects the capacitor C1 and the portion of the wiring 8c that connects the electrode 7b and the electrode 7c in a straight line may be formed integrally or separately.
  • the wiring direction of the wiring 8c that connects the capacitor C1 is perpendicular to the opening direction of the first coil L1 and the second coil L2, so that the opening direction of the first coil L1 and the second coil L2 and the capacitor It is perpendicular to the arrangement direction of C1 (the direction in which the electrodes of capacitor C1 are connected). Since the capacitor C1 is not arranged in the direction in which the magnetic fields of the first coil L1 and the second coil L2 are generated, the influence of the capacitor C1 on the magnetic fields of the first coil L1 and the second coil L2 can be reduced. Note that since the coil component 1 is a small chip component, heat radiation is generally dominant from the side of the board 60 on which it is mounted.
  • the heat dissipation from the coil component 1 can be improved by the wiring 8c provided so as to straddle the terminals 6b and 6c that function as intermediate terminals of the coil component 1, and the current that can be passed through the coil component 1 itself can be increased.
  • the width B of the wiring 8c may be twice the width A of the electrode 7b or the electrode 7c. As the width B of the wiring 8c increases, heat dissipation improves, but the distance between the coil component 1 and the capacitor C1 increases, and the parasitic inductance due to the wiring from the coil component 1 to the capacitor C1 increases. Therefore, the width B of the wiring 8c is preferably about 1.3 to 4 times the width A of the electrode 7b or the electrode 7c.
  • the width B of the wiring 8c improves heat dissipation, but it becomes impossible to arrange components other than the coil component 1 and the capacitor C1, and the degree of freedom in designing the board 60 decreases. Since the coil included in the coil component 1 is designed to allow a constant current to flow, heat generation does not pose a particular problem. The flow path becomes a heat generation problem. Therefore, it is only necessary to take heat radiation measures in the section between the electrode 7c and the electrode 7b. That is, in the case of the T-shaped wiring 8c as shown in FIG. 1, it is preferable that the length b of the portion of the wiring 8c connected to the capacitor C1 be longer than the distance a between the electrodes 7c and 7b.
  • the length b of the portion of the wiring 8c connected to the capacitor C1 is preferably shorter than the length c of the coil component 1, and compared to the case where the width B of the wiring 8c is made thicker, the length b of the portion of the wiring 8c connected to the capacitor C1 is preferably shorter than the length c of the coil component 1.
  • the capacitor C1 is connected in series to the wiring 8c, and is electrically connected to the wiring 8d (fourth wiring) on the side opposite to the side electrically connected to the wiring 8c.
  • An electrode 7f for electrically connecting to the capacitor C1 is formed on the wiring 8d.
  • the wiring 8d is grounded via the ground electrode 70.
  • the ground electrode 70 is an electrode that is electrically connected to a ground potential, and is made of, for example, a conductive via that is arranged in an inner layer of the substrate 60 and that is electrically connected to the ground potential.
  • FIG. 2 is a perspective view of the coil component 1 according to the first embodiment.
  • the coil component 1 includes a bobbin 2, a first wire 4, and a second wire 5.
  • the bobbin 2 has a body part 2a around which a wire is wound, and collar parts 2b and 2c provided at both ends of the body part 2a.
  • the bobbin 2 is made of a non-conductive material, specifically a non-magnetic material such as alumina, a magnetic material such as Ni--Zn ferrite, or resin.
  • the bobbin 2 When the bobbin 2 is made of resin, for example, it may be made of a resin containing magnetic powder such as metal powder or ferrite powder, a resin containing non-magnetic powder such as silica powder, or a resin that does not contain filler such as powder. configured.
  • a resin containing magnetic powder such as metal powder or ferrite powder
  • a resin containing non-magnetic powder such as silica powder
  • a resin that does not contain filler such as powder. configured.
  • the body portion 2a of the bobbin 2 is a prismatic column measuring 1.0 mm x 1.0 mm. Note that in this disclosure, the body portion 2a will be described as a prismatic column, but it may be a cylinder or a polygonal column.
  • the first wire 4 and the second wire 5 are wound directly around the body portion 2a. Note that the first wire 4 and the second wire 5 are, for example, copper wires.
  • the coil component 1 is formed by simultaneously winding the first wire 4 and the second wire 5 around the body portion 2a in the same direction. Furthermore, as shown in FIG. 2, the first wire 4 is wound once around the body part 2a to form a first coil L1, and the second wire 5 is wound once around the body part 2a to form a second coil L2. ing.
  • the first wire 4 is wound around three quarters of the circumference of the body part 2a from the terminal 6a to the terminal 6b, and the second wire 5 is wound around five sides of the body part 2a from the terminal 6c to the terminal 6d.
  • /It is wrapped 4 times.
  • wrapping the wire around the body part 2a once means wrapping the wire around the body part 2a once, and winding the wire around the body part 2a for 3/4 or 5/4 times. It also includes.
  • the terminal for fixing the first wire 4 and the terminal for fixing the second wire 5 will be explained.
  • the flanges 2b and 2c provided on both sides of the bobbin 2 have terminals 6a and 6b connected to the end of the first wire 4, and terminals 6a and 6b connected to the end of the second wire 5.
  • Terminals 6c and 6d are provided.
  • the collar portion 2b is provided with terminals 6a and 6c
  • the collar portion 2c is provided with terminals 6b and 6d, respectively.
  • the ends of the first wire 4 are applied to the terminals 6a and 6b, and the ends of the second wire 5 are applied to the terminals 6c and 6d, respectively, and the wires and the terminals are fixed by thermocompression bonding or laser welding.
  • the method of fixing the wire and the terminal is not limited to this, and a fixing method such as crimping, caulking, or soldering using a metal terminal may be adopted. Further, the wire and the terminal may be fixed by caulking using a metal terminal, and then laser welding may be performed.
  • the position of the terminal 6a provided on the collar portion 2b and the position of the terminal 6d provided on the collar portion 2c are the same. It is on the side (upper side in Figure 1). Therefore, the first wire 4 and the second wire 5, which are wound in the same direction around the body part 2a as shown in FIG. 2, are connected to the terminals 6a to 6d, so that the first coil L1 and the second coil L2 They are arranged in a crossed manner as shown in 1.
  • the first coil L1 and the second coil L2 are arranged in a cross manner, so that current can be passed through the first coil L1 from both the terminals 6a and 6b, and the second coil L2 can be passed from both the terminals 6c and 6d. If current can flow, there will be no difference in characteristics depending on the orientation of the coil component 1. That is, when the coil component 1 is mounted on the board 60, the orientation of the coil component 1 does not matter. Therefore, it is not necessary to provide a mark indicating the direction on the coil component 1, and there is no need to align the direction of the coil component during characteristic selection or taping, so that manufacturing costs can be reduced.
  • the terminal 6b of the coil component 1 is electrically connected to the power line 8a, and the coil component 1 is connected to the power line 8b.
  • Terminal 6c of coil component 1 is electrically connected, and terminals 6a and 6d function as intermediate terminals of coil component 1 and are connected to electrodes 7b and 7c of wiring 8c.
  • the terminals 6a and 6b, which are input terminals, and the terminals 6d, 6c, which are output terminals are arranged in a straight line as shown in FIG. Because they are lined up side by side, it becomes easier to use when connecting the input terminals and output terminals to other devices.
  • the opening direction of the first coil L1 and the second coil L2 becomes parallel to the surface of the substrate 60 on which the coil component 1 is mounted.
  • FIG. 3 is a circuit diagram of the filter circuit 100 according to the first embodiment.
  • the filter circuit 100 is specifically an EMI removal filter circuit, and is a third-order T-type LC filter circuit. Note that in this disclosure, the configuration of the filter circuit 100 will be explained using a third-order T-type LC filter circuit, but the structure may also be applied to a fifth-order T-type LC filter circuit or a higher-order T-type LC filter circuit. A similar configuration can be applied.
  • the filter circuit 100 includes a coil component 1 and a capacitor C1, as shown in FIG.
  • the capacitor C1 is connected in series between terminals 6b and 6c, which are intermediate terminals, and a ground electrode (GND). Although only one capacitor C1 may be used, two capacitors may be arranged in series to form a redundant circuit configuration assuming that the capacitor C1 is installed in a car.
  • capacitor C1 can be used not only for multilayer ceramic capacitors mainly composed of BaTiO3 (barium titanate), but also for multilayer ceramic capacitors mainly composed of other materials, as well as other non-multilayer ceramic capacitors, such as aluminum electrolytic capacitors. Any type of capacitor may be used.
  • the capacitor C1 connected to the coil component 1 has an inductor L3 as a parasitic inductance (equivalent series inductance (ESL)). Therefore, the filter circuit 100 has an equivalent circuit configuration in which the inductor L3 is connected in series with the capacitor C1, as shown in FIG.
  • a first coil L1 and a second coil L2 are connected to the terminals 6b and 6c.
  • the first coil L1 and the second coil L2 are magnetically coupled and generate a negative inductance component (mutual inductance M).
  • the parasitic inductance (inductor L3) of the capacitor C1 can be canceled out, and the inductance component of the capacitor C1 can be made smaller in appearance.
  • mutual inductance M (-M) for canceling inductor L3 is connected in series with capacitor C1, and mutual inductance M (+M) is added to each of first coil L1 and second coil L2. It is shown as an equivalent circuit.
  • the filter circuit 100 composed of the capacitor C1, the first coil L1, and the second coil L2 cancels the parasitic inductance of the capacitor C1 with a negative inductance component due to the mutual inductance M between the first coil L1 and the second coil L2. Accordingly, the effect of suppressing noise in a high frequency band can be improved.
  • the parasitic inductance due to the wiring 8c that electrically connects the terminals 6b and 6c of the coil component 1 is generated in series with the capacitor C1 and the inductor L3, which is the parasitic inductance of the capacitor C1, so the length of the wiring 8c is By changing the parasitic inductance, it is possible to adjust the inductor L3 and the mutual inductance M so that they cancel each other out.
  • the circuit device 10 includes the coil component 1 and the substrate 60 on which the coil component 1 is mounted.
  • the coil component 1 includes a first coil L1, a second coil L2 whose opening overlaps with the first coil L1 when viewed from the opening direction of the first coil L1, and a terminal 6a connected to one end of the first coil L1.
  • a terminal 6b connected to the other end of the first coil L1, a terminal 6c connected to one end of the second coil L2, and a terminal 6d connected to the other end of the second coil L2, including.
  • the direction of the magnetic field generated in the first coil L1 when current flows from terminal 6a to terminal 6b is the same as the direction of the magnetic field generated in second coil L2 when current flows from terminal 6c to terminal 6d.
  • the board 60 includes a power line 8a electrically connected to the terminal 6a, a power line 8b electrically connected to the terminal 6d, and a wiring 8c electrically connected to the terminal 6b and the terminal 6c. .
  • the wiring 8c is also electrically connected to the capacitor C1.
  • the circuit device 10 includes the wiring 8c that is electrically connected to the terminals 6b and 6c of the coil component 1, and the wiring 8c is also electrically connected to the capacitor C1.
  • the filter circuit 100 using the coil component 1 with low manufacturing cost and stable mutual inductance can be realized.
  • the filter circuit 100 includes the circuit device 10 described above and a capacitor C1 electrically connected to the wiring 8c of the circuit device 10. Thereby, the filter circuit 100 can cancel the parasitic inductance of the capacitor C1 and improve the noise suppression effect in the high frequency band.
  • FIG. 4 is a plan view of a circuit device 10A according to modification 1-1.
  • FIG. 5 is a plan view of a circuit device 10B according to modification 1-2.
  • the same components as those in the circuit device 10 shown in FIG. 4 and 5 the same components as those in the circuit device 10 shown in FIG.
  • the shape of the wiring 8c1 when viewed from the direction perpendicular to the substrate 60 is L-shaped.
  • the wiring 8c1 has an L-shape in which the wiring portion connecting the capacitor C1 extends from the long side on the electrode 7c side of the wiring portion connecting the electrode 7b and the electrode 7c in a straight line.
  • the capacitor C1 is connected in series to the wiring 8c1, and is electrically connected to the wiring 8d on the side opposite to the side electrically connected to the wiring 8c1.
  • the wiring 8c1 may have an L-shape in which the wiring portion connecting the capacitor C1 extends from the long side on the electrode 7b side of the wiring portion connecting the electrode 7b and the electrode 7c in a straight line.
  • the shape of the wiring 8c2 when viewed from the direction perpendicular to the substrate 60 is I-shaped.
  • the wiring 8c2 has an I-shape in which the wiring portion connecting the capacitor C1 extends from the short side on the electrode 7b side of the wiring portion connecting the electrode 7b and the electrode 7c in a straight line.
  • the capacitor C1 is connected in series to the wiring 8c2, and is electrically connected to the wiring 8d on the side opposite to the side electrically connected to the wiring 8c2.
  • the wiring 8c2 may have an I-shape in which the wiring portion connecting the capacitor C1 extends from the short side on the electrode 7c side of the wiring portion connecting the electrode 7b and the electrode 7c in a straight line.
  • the portion of the wiring that connects the capacitor C1 can be connected to various portions. Therefore, since the mounting position of the capacitor C1 can be changed freely, the degree of freedom in the design of the set manufacturer that employs the circuit device is improved.
  • FIG. 6 is a perspective view of a circuit device according to a second modification. In the circuit device 10C shown in FIG. 6, the same components as the circuit device 10 shown in FIG.
  • the circuit device 10C shown in FIG. 6 is constructed as one component by attaching an interposer board 62 on which power lines 8a, 8b and wiring 8c are formed to the surface of the coil component 1 on which the terminals 6a to 6d are provided.
  • the interposer board 62 has power lines 8a, 8b, and wiring 8c formed on its surface that is in contact with the coil component 1, and is electrically connected to the power lines 8a, 8b, and wiring 8c by through electrodes (not shown) on its back surface. electrodes are formed.
  • an electrode 80a electrically connected to the power line 8a through the through electrode
  • an electrode (not shown) electrically connected to the power line 8b through the through electrode
  • wiring an electrode 80c is formed which is electrically connected to 8c by a through electrode.
  • the electrode 80a is connected to the power supply line of the device on which the circuit device 10C is mounted, and the electrode 80c is connected to the capacitor C1.
  • the coil component 1 was described as having a structure in which the first wire 4 and the second wire 5 were wound around the bobbin 2, as shown in FIG.
  • the coil component mounted on the circuit device 10 is not limited to a coil component in which a wire is wound around a bobbin, but may be a coil component in which a coil formed of a metal plate or a metal wire is molded with resin. Good too.
  • FIG. 7 is a perspective view of a coil component 1A according to modification example 3.
  • FIG. 8 is a side view of a coil component 1A according to modification 3. Note that FIG. 8(a) is a side view of the coil component 1A in the XZ plane, and FIG. 8(b) is a side view of the coil component 1A in the YZ plane.
  • the coil component 1A includes a coil portion 4a (first coil L1) and a coil portion 5a (second coil L2) in the housing 9.
  • the coil portion 4a has a rectangular opening and is arranged inside the housing 9 substantially parallel to the main surface 90A (first main surface). Further, the coil portion 4a has a spiral structure in which a metal plate is punched out and wound 1.5 turns by adding an inclination to a part, and the portion pulled out from the side surface 91 (first side surface) of the casing 9 is a spiral structure.
  • the terminal 6a (first terminal) is configured, and the portion drawn out from the side surface 92 (second side surface) is configured as the terminal 6b (second terminal).
  • the coil portion 5a has a rectangular opening and is arranged above the coil portion 4a inside the housing 9, substantially parallel to the main surface 90A.
  • the coil part 5a has a spiral structure in which a metal plate is punched out and a part thereof is wound 1.5 times with an inclination, and the part pulled out from the side surface 91 of the housing 9 is a terminal 6c
  • the portion drawn out from the side surface 92 constitutes the terminal 6d (fourth terminal).
  • the terminals 6a to 6d are provided up to the main surface 90B and are provided on the same plane of the coil component 1A.
  • the terminals 6a to 6d are arranged so that the direction from the terminal 6a to the terminal 6b crosses the direction from the terminal 6c to the terminal 6d. In other words, the terminals 6a to 6d are arranged in a staggered manner on the main surface 90B.
  • the opening direction of the coil parts 4a and 5a is perpendicular to the substrate 60, and the arrangement relationship with the capacitor C1 connected to the terminal 6c of the coil portion 4a and the terminal 6d of the coil portion 5a is also perpendicular.
  • the housing 9 fixes the relative positions of the coil portion 4a and the coil portion 5a, and is made of, for example, molded resin.
  • the mold resin is made of epoxy resin containing silica filler, silicone resin, liquid crystal polymer, or various resins containing metal magnetic material.
  • the coil portion 4a and the terminals 6a, 6b may be formed from separate metal plates or metal wires. Good too.
  • the coil portion 5a and the terminals 6c, 6d are formed integrally with one metal plate or one metal wire, the coil portion 5a and the terminals 6c, 6d are formed with separate metal plates or metal wires. may be formed.
  • FIG. 9 illustrates a configuration in which the connection positions at both ends of the first coil L1 and the connection positions at both ends of the second coil L2 do not cross in the coil component. It is a top view of 10D.
  • the same components as those in the circuit device 10 shown in FIG. 10 the same components as those in the circuit device 10 shown in FIG.
  • the configuration of the coil component 1B mounted on the board 60 is different.
  • the coil component 1B includes a terminal 6a (first terminal) connected to one end of the first wiring 4B constituting the first coil L1, and a terminal connected to the other end of the first wiring 4B. 6c (second terminal), a terminal 6b (third terminal) connected to one end of the second wiring 5B constituting the second coil L2, and a terminal 6d connected to the other end of the second wiring 5B. (fourth terminal).
  • the first wiring 4B of the first coil L1 is connected to the electrode 7a and electrode 7c provided on the substrate 60
  • the second wiring 5B of the second coil L2 is connected to the electrode 7b and electrode 7d. Therefore, the coil component 1B is arranged such that the connection positions at both ends of the first coil L1 and the connection positions at both ends of the second coil L2 do not cross.
  • the coil component 1B may have a structure in which a first wire and a second wire are wound around a bobbin, or may have a structure in which a coil formed of a metal plate or a metal wire is molded with resin.
  • FIG. 10 is a perspective view of a coil component 1B according to the second embodiment.
  • the same components as those in the coil component 1A shown in FIG. 7 are designated by the same reference numerals, and detailed description thereof will not be repeated.
  • the coil component 1B includes a coil portion 4b (first coil L1) and a coil portion 5b (second coil L2) in the housing 9.
  • the coil portion 4b has a rectangular opening and is embedded inside the housing 9 substantially parallel to the main surface 90A (first main surface). Further, in the coil portion 4b, one portion drawn out from the side surface 91 (first side surface) of the housing 9 constitutes the terminal 6a, and the other portion constitutes the terminal 6c. Note that the coil portion 4b, the terminal 6a, and the terminal 6c are formed by punching out a metal plate, and correspond to the first wiring 4B shown in FIG. 9.
  • the coil portion 5b has a rectangular opening and is arranged above the coil portion 4a inside the housing 9, substantially parallel to the main surface 90A. Further, one portion of the coil portion 5a drawn out from the side surface 92 of the housing 9 constitutes a terminal 6b, and the other portion constitutes a terminal 6d. Note that the coil portion 5b, the terminal 6b, and the terminal 6d are formed by punching out a metal plate, and correspond to the second wiring 5B shown in FIG.
  • the terminals 6a to 6d are provided up to the main surface 90B. Terminals 6a to 6d provided on main surface 90B are electrically connected to electrodes 7a to 7d provided on substrate 60.
  • the terminals 6a to 6d are arranged on the main surface 90B without the direction from the terminal 6a to the terminal 6c and the direction from the terminal 6d to the terminal 6b crossing. Therefore, the circuit device 10D that combines the substrate 60 and the coil component 1B can be mounted on the substrate 60 regardless of the orientation of the coil component 1B, and a filter circuit using negative mutual inductance can be configured.
  • the circuit device of the present disclosure includes a coil component and a substrate on which the coil component is mounted, and the coil component includes a first coil and an opening that is connected to the first coil when viewed from the opening direction of the first coil.
  • the substrate has a first wiring electrically connected to the first terminal. a second wiring electrically connected to the fourth terminal; and a third wiring electrically connected to the second terminal and the third terminal, the third wiring being electrically connected to the capacitor. connected.
  • the circuit device of the present disclosure includes a third wiring that is electrically connected to the second terminal and the third terminal of the coil component, and the third wiring is also electrically connected to the capacitor, so the manufacturing cost is low; A filter circuit using coil components with stable mutual inductance can be realized.
  • the coil component has a rectangular shape when viewed from a direction perpendicular to the substrate, and the first to fourth terminals of the coil component are rectangular.
  • the terminals are provided on the same plane, and the terminals are arranged so that the direction from the first terminal to the second terminal crosses the direction from the third terminal to the fourth terminal. Thereby, the first coil and the second coil can be arranged crosswise.
  • the circuit device in which the third wiring is connected to the third wiring when viewed from a direction perpendicular to the substrate. It includes a connection point of the terminal and a portion that connects the third wiring and the connection point of the third terminal with a straight line. This makes it possible to realize a filter circuit using coil components with stable mutual inductance.
  • the coil component includes a body portion around which a wire is wound, and a bobbin having flanges provided at both ends of the body portion. , a first wire wound around the body part forming the first coil, and a second wire wound around the body part forming the second coil, and the first terminal to the fourth terminal are It is formed in the flange. Thereby, a filter circuit using a wire-wound coil can be realized.
  • opening directions of the first coil and the second coil are parallel to a surface of the substrate on which the coil component is mounted. Thereby, the influence of the capacitor C1 on the magnetic fields of the first coil and the second coil can be reduced.
  • the first wire and the second wire are wound in the same direction. Thereby, mutual inductance can be adjusted in the winding direction of the wire.
  • the coil component includes a casing, and is arranged inside the casing and is substantially parallel to the first main surface of the casing. a first coil disposed in the casing, and a second coil disposed inside the casing so that the opening of the first coil overlaps with the opening when viewed from the direction of the first main surface, the first coil , the second coil has a first terminal pulled out from the first side surface side of the housing and a second terminal pulled out from the second side side side, and the second coil has a third terminal pulled out from the first side side side of the housing and a second terminal pulled out from the first side side side of the housing.
  • the first terminal and the third terminal extending in the direction of the second main surface along the first side surface side
  • the second terminal and the fourth terminal extending from the second side surface side. It extends in the direction of the second main surface along the second side surface.
  • the opening direction of the first coil and the second coil is perpendicular to the surface of the substrate on which the coil component is mounted.
  • a filter circuit of the present disclosure includes the circuit device according to any one of (1) to (12) and a capacitor electrically connected to the third wiring of the circuit device. Thereby, the filter circuit of the present disclosure can cancel the parasitic inductance of the capacitor and improve the noise suppression effect in the high frequency band.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Filters And Equalizers (AREA)
PCT/JP2023/015779 2022-04-28 2023-04-20 回路装置、およびフィルタ回路 Ceased WO2023210499A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202390000246.1U CN222928375U (zh) 2022-04-28 2023-04-20 电路装置和滤波电路
JP2024517262A JP7673872B2 (ja) 2022-04-28 2023-04-20 回路装置、およびフィルタ回路
US18/822,788 US20240428985A1 (en) 2022-04-28 2024-09-03 Circuit device and filter circuit

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JP2022074555 2022-04-28
JP2022-074555 2022-04-28

Related Child Applications (1)

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Publication number Priority date Publication date Assignee Title
WO2024166971A1 (ja) * 2023-02-09 2024-08-15 株式会社村田製作所 回路装置、および回路基板
WO2025100089A1 (ja) * 2023-11-06 2025-05-15 株式会社村田製作所 コイル部品

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH0661054A (ja) * 1992-08-08 1994-03-04 Toko Inc Ｌｃ複合部品
WO2019229939A1 (ja) * 2018-05-31 2019-12-05 三菱電機株式会社 ノイズフィルタ及び電気電子機器
WO2021044848A1 (ja) * 2019-09-06 2021-03-11 株式会社村田製作所 フィルタ素子

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Publication number Priority date Publication date Assignee Title
US6937115B2 (en) * 2002-02-25 2005-08-30 Massachusetts Institute Of Technology Filter having parasitic inductance cancellation
JP6114660B2 (ja) * 2013-08-23 2017-04-12 日立オートモティブシステムズ株式会社 電力変換装置
JP7003955B2 (ja) * 2019-03-19 2022-02-04 株式会社豊田中央研究所 ノイズフィルタ
CN219164535U (zh) * 2020-07-13 2023-06-09 株式会社村田制作所 滤波器电路以及包含该滤波器电路的电源装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0661054A (ja) * 1992-08-08 1994-03-04 Toko Inc Ｌｃ複合部品
WO2019229939A1 (ja) * 2018-05-31 2019-12-05 三菱電機株式会社 ノイズフィルタ及び電気電子機器
WO2021044848A1 (ja) * 2019-09-06 2021-03-11 株式会社村田製作所 フィルタ素子

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024166971A1 (ja) * 2023-02-09 2024-08-15 株式会社村田製作所 回路装置、および回路基板
WO2025100089A1 (ja) * 2023-11-06 2025-05-15 株式会社村田製作所 コイル部品

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JPWO2023210499A1 (https=) 2023-11-02
CN222928375U (zh) 2025-05-30
US20240428985A1 (en) 2024-12-26

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