WO2013076916A1 - スイッチング素子の駆動回路 - Google Patents
スイッチング素子の駆動回路 Download PDFInfo
- Publication number
- WO2013076916A1 WO2013076916A1 PCT/JP2012/006810 JP2012006810W WO2013076916A1 WO 2013076916 A1 WO2013076916 A1 WO 2013076916A1 JP 2012006810 W JP2012006810 W JP 2012006810W WO 2013076916 A1 WO2013076916 A1 WO 2013076916A1
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- main current
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/04—Modifications for accelerating switching
- H03K17/042—Modifications for accelerating switching by feedback from the output circuit to the control circuit
- H03K17/04206—Modifications for accelerating switching by feedback from the output circuit to the control circuit in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/04—Modifications for accelerating switching
- H03K17/042—Modifications for accelerating switching by feedback from the output circuit to the control circuit
- H03K17/0424—Modifications for accelerating switching by feedback from the output circuit to the control circuit by the use of a transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
Definitions
- This disclosure relates to a switching element drive circuit.
- the switching element drive circuit turns the switching element on and off by controlling the voltage applied to the control terminal of the switching element.
- the main factor that determines the on / off time of the switching element is the charge / discharge time corresponding to the parasitic capacitance.
- the charging time of the parasitic capacitance is determined according to the magnitude of the current value that flows from the drive circuit to the control terminal of the switching element. Therefore, in order to shorten the charging time, it is preferable to increase the current value flowing into the control terminal.
- This type of technology is described in Patent Document 1, for example.
- This patent document 1 discloses a configuration in which the voltage applied to the control terminal of the switching element is forcibly brought close to the power supply voltage.
- the conventional drive circuit increases the value of the current flowing from the control terminal of the switching element to the parasitic capacitance, thereby speeding up the switching operation.
- the current supply capability of the drive circuit must be increased.
- an inductor is provided around the current path through which the main current of the switching element flows, and the induced electromotive voltage generated in the inductor is superimposed on the voltage applied to the control terminal of the switching element. Yes. By operating in this way, it has been proposed that the switching element can be operated at high speed without increasing the current supply capability of the drive circuit.
- Patent Document 2 In order to put the technology described in Patent Document 2 into practical use, it becomes a problem how to arrange the inductor with respect to the main current path.
- a ring-shaped ferrite core and a coil wound around the ring-shaped core are used.
- fixing is difficult because the core is formed in a ring shape.
- the core is installed around the main current path, a large arrangement space is required.
- An object of the present disclosure is to provide a driving circuit for a switching element in which a coil can be easily fixed and an installation space can be reduced.
- the drive circuit includes a switching element, a main current wiring, and a substrate.
- the switching element is on / off controlled in accordance with a pulse signal transmitted from a signal source, and a main current flows.
- the main current wiring has a flat surface and conducts the main current of the switching element.
- the substrate has a flat surface mounted on the flat surface of the main current wiring, and a coil is disposed therein. The coil is arranged so as to interlink with a magnetic flux generated according to the main current of the switching element, and is electrically connected to receive a pulse signal of the signal source and transmit it to the control terminal of the switching element. It is connected to the.
- the space between the main current wiring and the flat surface of the substrate is a close contact surface, so the installation space can be reduced.
- the contact surfaces between the substrate and the main current wiring are flat surfaces, they can be easily fixed.
- FIG. 1 is a circuit diagram illustrating an example of a switching element drive circuit according to the first embodiment of the present disclosure.
- FIG. 2A is a plan view of a portion including a connection portion between the switching element and the coil of the driving circuit for the switching element according to the first embodiment
- FIG. 2B is a structural example of the discrete switching element.
- FIG. 2C is a perspective view illustrating an installation example of the multilayer wiring board with respect to the main current conducting board.
- FIG. 3A is a plan view showing a wiring pattern of the first layer in the multilayer wiring board, and FIG.
- FIG. 3B is a plan view showing a wiring pattern of the second layer in the multilayer wiring board.
- FIG. 3C is a plan view showing a third layer wiring pattern in the multilayer wiring board, and
- FIG. 3D is a plan view showing a fourth layer wiring pattern in the multilayer wiring board.
- FIG. 4 is a longitudinal sectional view showing the structure of the multilayer wiring board.
- FIG. 5 is a diagram for explaining the direction of magnetic flux generated around the main current wiring.
- FIG. 6 is an image diagram of magnetic flux interlinking with the coils in the multilayer wiring board.
- FIG. 7 is a plan view showing the positional relationship between the coil and the main current wiring.
- FIG. 8A is a timing chart for explaining the ON operation of the switching element, and FIG.
- FIG. 9A is a plan view showing a first layer wiring pattern in the multilayer wiring board of the switching element drive circuit according to the second embodiment of the present disclosure
- FIG. 9B is a multilayer wiring board
- 9 (c) is a plan view showing a third layer wiring pattern in the multilayer wiring board
- FIG. 9 (d) is a multilayer wiring board. It is a top view which shows the wiring pattern of the 4th layer inside.
- FIG. 10 is a plan view of a portion including a connection portion between a switching element and a coil of a switching element drive circuit according to a third embodiment of the present disclosure.
- FIG. 10 is a plan view of a portion including a connection portion between a switching element and a coil of a switching element drive circuit according to a third embodiment of the present disclosure.
- FIG. 11 is a circuit diagram illustrating an example of a switching element drive circuit according to the fourth embodiment of the present disclosure.
- FIG. 12 is an exploded perspective view illustrating the layer structure of the multilayer wiring board of the switching element drive circuit according to the fifth embodiment of the present disclosure.
- FIG. 13 is a perspective view showing the arrangement relationship between the coil and the main current wiring in the drive circuit for the switching element according to the sixth embodiment of the present disclosure.
- the drive circuit 1 for the switching element M1 according to the first embodiment will be described below with reference to FIGS.
- the switching element M ⁇ b> 1 is configured using, for example, an N-channel MOS transistor and is connected in series with the inductive load 2.
- a freewheeling diode D is connected to the inductive load 2 in parallel.
- a DC voltage E1 is applied to the series connection circuit of the switching element M1 and the inductive load 2.
- the DC voltage E1 is the main power supply voltage of this series connection circuit.
- the signal source S and the drive circuit 1 are connected to the gate terminal (control terminal) M1g of the switching element M1.
- the signal source S includes control switches SW1 and SW2 connected in series between both positive and negative terminals of the DC voltage source E2, and outputs a pulse signal.
- the drive circuit 1 is configured by combining a gate resistance Rg and a coil L in addition to the signal source S, and drives the switching element M1 on and off by applying a pulse signal (for example, a PWM signal) to the gate of the switching element M1.
- the drive circuit 1 may or may not include the signal source S as a constituent requirement.
- the coil L is configured in a multilayer wiring board 8 to be described later, and is installed around the current path 3 of the main current flowing through the source terminal (output terminal) M1s of the switching element M1. Thus, an induced electromotive voltage corresponding to the change in the energization current is generated.
- One terminal Lt1 of the coil L is connected to the gate terminal M1g of the switching element M1, and the other terminal Lt2 is connected to the signal output side of the gate resistor Rg.
- the main current conducting substrate 4 is made of, for example, glass epoxy resin as a base material. As shown in FIG. 2A, a wiring pattern is formed on the base material with a metal such as a copper foil. A main current wiring (wiring pattern) 5 for energizing drain current is formed on the surface of the main current energizing substrate 4, and a main current wiring (wiring pattern) 6 for energizing source current is formed. On the front and back surfaces of the main current conducting substrate 4, gate voltage application wiring (wiring patterns) 7 are formed in a pattern narrower than the wiring width of the main current wirings 5 and 6.
- the gate voltage applying wiring 7 includes a plurality of wirings 7a to 7c.
- the wiring 7a has a gate connection land Lag at one end and a connection terminal to the coil L at the other end.
- a part of the wiring 7 a extends in the same direction as the current conduction direction (vertical direction in FIG. 2A) of the main current wiring 6 for source current conduction, and is formed in parallel with the main current wiring 6. .
- the other end of the wiring 7a is connected to the connection terminal 9a of the coil L configured in the multilayer wiring board 8 by soldering, whereby the wiring 7a is electrically connected to one terminal Lt1 of the coil L.
- the structure and arrangement position in the multilayer wiring board 8 will be described later.
- One end of the wiring 7b is connected to the connection terminal 9b of the coil L by soldering, and is thereby electrically connected to the other terminal Lt2 of the coil L.
- a land 4a for connecting a gate resistor Rg disposed inside the side of the main current conducting substrate 4 is formed.
- the wiring 7c is arranged on the back surface of the main current carrying substrate 4, and a land Las is formed at one end thereof, and a land 4b is formed at the other end of the land. Has been.
- the land Las is also provided at the pattern end portion of the main current wiring 6, and the land Las is connected through the front and back surfaces by through holes.
- the main current wiring 6 for energizing the source current and the wiring 7c are electrically connected.
- the main current wiring 5 has a drain connection land Lad at the end of the pattern, and the drain connection land Lad is provided with a through hole.
- the switching element M1 is electrically configured, for example, inside a TO (Transistor-Outline) package or the like, and has a plurality of lead terminals Leg (gate), Led (drain), Les ( Source) is extended to the outside of the package, and these lead terminals Leg, Led, and Les are formed in the lands Lag, Lad, and Las of the main current conducting substrate 4 shown in FIG. Each hole is fixed by being inserted and soldered.
- a multilayer wiring board 8 is mounted on the main current wiring 6 of the main current conducting substrate 4.
- the first layer 8a to the fourth layer 8d of the multilayer wiring board 8 are each formed in a flat plate shape using a glass epoxy resin as a base material.
- a wiring pattern made of metal is formed on the upper surface of the substrate.
- the lower surface of the first layer 8a is formed into a flat surface and becomes a mounting surface to be mounted on the upper surface of the main current wiring 6 (main current conducting substrate 4).
- the first layer 8a to the fourth layer 8d are connected through through holes (corresponding to vias) H1 to H6 arranged in a zigzag manner from the connection terminals 9a and 9b side of the multilayer wiring board 8 to the opposite side.
- connection terminals 9a and 9b are configured, and the connection terminals 9a and 9b are connected by a through hole penetrating between the first layer 8a and the fourth layer 8d.
- the metal wiring 10 connects between the through holes H1 and H2, between H3 and H4, and between H5 and H6.
- the metal wiring 10 connects the connection terminal 9a and the through hole H6.
- the metal wiring 10 is connected between the connection terminal 9b and the through hole H1, between the through holes H2 and H3, and between the through holes H4 and H5. Are connected.
- the current flow path includes the connection terminal 9a, the through hole H6, the metal wiring 10 between H6 and H5 of the first layer 8a, the through hole H5, the metal wiring 10 between H5 and H4 of the fourth layer 8d, and the through hole. H4,..., Through hole H1, H1 of fourth layer 8d, and metal wiring 10 between connection terminals 9b.
- the coil L can be configured by forming a current path in a loop shape by the metal wiring 10 and the through holes H1 to H6.
- One terminal Lt1 of the coil L is connected to the connection terminal 9a, and the other terminal Lt2 is connected to the connection terminal 9b.
- a coil L having more than three turns may be used practically in order to improve sensitivity.
- a coil L having a number of turns of less than 3 may be used to reduce the installation space.
- a multilayer wiring board 8 is mounted in close contact with the main current wiring 6.
- the first layer (lowermost layer) 8a of the multilayer wiring board 8 is configured by using a glass epoxy resin as a base material. Between these first layer 8a and the main current wiring 6, a circuit pattern made of a solder resist or the like is used. An insulating film is provided for protection. Thereby, the insulation between the main current wiring 6 and the multilayer wiring board 8 is maintained. Further, a thin insulating layer such as polyimide may be separately provided in order to enhance the insulation.
- the coil L is configured by being surrounded by the metal wiring 10 and through holes H1 to H6 of each layer 8a to 8d and coupled in a loop shape.
- a magnetic flux ⁇ is generated around the main current wiring 6 and is linked to the opening surface La of the coil L configured in the multilayer wiring board 8. .
- the coil L generates an induced electromotive voltage.
- the magnetic flux is linked to the opening surface of the coil in the multilayer wiring board.
- the interlinkage direction of the magnetic flux is a direction perpendicular to the printing surface in FIG. 6.
- the opening surface La of the coil L is large, the interlinkage number of the magnetic flux ⁇ increases. Can be increased.
- the multilayer wiring board 8 has a four-layer structure.
- the multilayer wiring board 8 is not limited to this, and a multilayer wiring board having five or more layers may be used when the area for passing magnetic flux is increased.
- the multilayer wiring board 8 should be made thin.
- the multilayer wiring board 8 is constituted by a two-layer double-layer board or a three-layer multilayer board.
- the coil L may be disposed. That is, the number of layers of the multilayer wiring board 8 is preferably selected as appropriate.
- the coil and the main current wiring are arranged as shown in FIG. As described above, the coil L is preferably wound three or more times in the multilayer wiring board 8.
- the length l between the winding ends of the coil L is the wiring width of the main current wiring 6. It is preferable that the length is equal to or less than W, and is placed within the wiring width W in a plane.
- the coil L includes a parasitic capacitance Cp1, a parasitic capacitance Cp2, and a parasitic inductor Lp in the illustrated form.
- the drive circuit 1 supplies the step-like gate voltage Vdr from the voltage source E2 to the control terminal (MOSFET) of the switching element M1.
- MOSFET control terminal
- the gate input capacitance of the switching element M1 is charged, and the gate-source voltage of the switching element M1 gradually increases (section A in FIG. 8A).
- the output current (source current Is ( ⁇ drain current Id)) of the switching element M1 hardly flows.
- the gate-source voltage Vgs of the switching element M1 exceeds the threshold voltage Vth, the source current Is ( ⁇ drain current Id) starts to increase. For this reason, the induced electromotive voltage Kp ⁇ dIs / dt depending on the change amount dIs / dt of the source current Is is superimposed in the positive direction (B section in FIG. 8A). Then, the increase degree of the source current Is and the drain current Id can be increased. Thereby, the switching element M1 can be switched at high speed.
- the mounting surface of the multilayer wiring board 8 can be flat. Accordingly, if the main current wiring 6 (main current conducting substrate 4) is formed as a flat installation surface, the main current wiring 6 (main current energizing substrate 4) can be brought into close contact by simply disposing the mounting surface of the multilayer wiring board 8 on the upper surface of the main current wiring 6. Can be installed. This eliminates the need for a large installation space around the main current wiring 6. Since the multilayer wiring board 8 can be disposed on the main current wiring 6 (main current conducting substrate 4), a large amount of magnetic flux can be linked to the coil L.
- the coil L has a length l between its winding ends that is equal to or less than the wiring width W of the main current wiring 6 and is installed within the wiring width W of the main current wiring 6.
- the magnetic flux generated according to the current flowing through the coil L can be linked to the coil L.
- the magnetic flux generated according to the current flowing through the current path other than the main current wiring 6 can be linked as little as possible. . Therefore, the detection accuracy by the coil L can be improved and noise resistance can be improved.
- the coil L is configured by combining the metal wiring (wiring pattern) 10 formed on each of the plurality of layers 8a to 8d of the multilayer wiring board 8 and the through holes H1 to H6 that couple the metal wiring 10 in a loop shape.
- the coil L can be incorporated into the multilayer wiring board 8 in a compact manner. Thereby, the coil L can be comprised at low cost. In addition, an iron core, a ferrite core and the like are unnecessary, and cost reduction can be realized.
- Cost reduction can be realized because the winding process can be omitted even in the manufacturing method. Since the upper surface of the main current wiring 6 is coated with an insulating material such as solder resist, the insulation between the coil L and the main current wiring 6 can be maintained.
- connection terminals 11a and 11b are respectively formed adjacent to the connection terminals 9a and 9b, and these connection terminals 11a and 11b are formed in the first layer 8a. Are connected by a through hole penetrating the fourth layer 8d.
- the through holes H1 to H6 are arranged in a zigzag manner as in the above-described embodiment, and the metal wiring 10 is formed in the first layer 8a and the third layer 8c.
- the through holes H1 to H6 are connected in order.
- the through holes H7 are further arranged in a zigzag manner with respect to the through holes H1 to H6, and the metal wiring 10 is connected to the through holes H7.
- the terminal 9a is connected. Further, the metal wiring 10 connects the through hole H1 and the connection terminal 11b.
- the current flow path includes the connection terminal 9a, the through hole H7, the metal wiring 10 between H7 and H6 of the third layer 8c, the through hole H6, the metal wiring 10 between H6 and H5 of the first layer 8a, and the through hole. H5, metal wiring 10 between H5 and H4 of the third layer 8c, through hole H4,..., Through hole H1, metal wiring 10 between H1 of the third layer 8c and connection terminal 11b.
- the first layer 8a shown in FIG. 9A and the third layer 8c shown in FIG. 9C are in a predetermined direction (viewed from the left side in FIGS. 9A to 9D).
- the partial coil L1 wound in the clockwise direction: clockwise can be configured.
- the layers 8a to 8d of the multilayer wiring board 8 are arranged in a zigzag manner in a plane from the connection terminals 9a and 9b side of the multilayer wiring board 8 to the opposite side.
- the through holes H8 to H15 are connected to each other.
- the metal wiring 10 connects between the through holes H8 and H9, between H10 and H11, between H12 and H13, and between H14 and H15.
- the metal wiring 10 is a through hole. Between H9 and H10, between H11 and H12, between H13 and H14, and between the through hole H15 and the connection terminal 11a.
- the current flow path includes the connection terminal 11a, the metal wiring 10 between the connection terminal 11a of the fourth layer 8d and the through hole H15, the through hole H15, the metal wiring 10 between H15 and H14 of the second layer 8b, and the through hole.
- H14 metal wiring 10 between H14 and H13 of the fourth layer 8d, through hole H13,..., Through hole H8, metal wiring 10 between through hole H8 and connection terminal 9b.
- the direction opposite to the one direction (FIGS. 9A to 9D).
- the partial coil L2 wound in a counterclockwise direction (left-handed) can be configured.
- the coils can be configured with the partial coils L1 and L2 connected in series by connecting and short-circuiting the connection terminals 11a and 11b.
- the partial coil L1 and the partial coil L2 are connected in series. Further, since the partial coil L1 and the partial coil L2 are wound in opposite directions, resistance to disturbance noise can be increased. Further, since the partial coil L1 is formed between the first layer 8a and the third layer 8c, and the partial coil L2 is formed between the second layer 8b and the fourth layer 8d, the flux linkage region between the partial coils L1 and L2 is formed. Can be provided in an overlapping manner, and resistance to disturbance noise can be enhanced.
- the partial coil L1 is connected to the first layer 8a.
- the partial coil L2 may be configured between the third layer 8c and the fourth layer 8d between the second layers 8b.
- the slit 12 is formed along the main current wiring 6 so as to be located on the side of the current path of the main current wiring 6.
- the slit 12 is formed between the main current wiring 6 through which the source current Is flows and the wirings 7a and 7b.
- the slit 12 is also formed between the land for connecting the source lead terminal Les and the wiring 7a.
- a switching element drive circuit according to a fourth embodiment of the present disclosure will be described with reference to FIG. 11. As shown in FIG. 11, between the one terminal Lt1 and the other terminal Lt2 of the coil L, Zener diodes D1 and D2 are connected in directions opposite to each other. Then, when the induced electromotive voltage is excessively generated in the coil L, the induced electromotive voltage can be clamped at a predetermined voltage.
- the multilayer wiring board 13 of this embodiment has a five-layer structure of a first layer 13a, a second layer 13b, a third layer 13c, a fourth layer 13d, and a fifth layer 13e.
- a wiring pattern metal wiring
- 10 and through holes H1 to H15 are formed.
- a pattern similar to the wiring pattern main current wirings 5 and 6 and gate current application wiring 7 formed on the main current conducting substrate 4 is formed.
- the coil L (partial coils L1, L2) and the main current wiring 6 can be mounted together on the multilayer wiring board 13. The trouble of separately mounting the coil L and the main current wiring 6 is eliminated.
- the present invention is not limited to this. That is, as shown in FIG. 13, instead of the main current wirings 5 and 6 of the above-described embodiment, a conductive plate 14 having a predetermined thickness is formed, a recess 14a is formed in a part thereof, and a multilayer is formed on the recess 14a.
- a wiring board 8 may be mounted.
- the lower surface of the recess 14 a of the conductive plate 14 becomes a mounting surface of the multilayer wiring board 8.
- the concave portion 14a of the conductive plate 14 has a flat concave surface, and the multilayer wiring board 8 is mounted on the lower surface of the concave portion 14a.
- the induced electromotive voltage of the coil L can be acquired by connecting the wiring 15. Even in such a form, the magnetic flux generated according to the energization current of the conductive plate 14 can be linked to the coil L in the multilayer wiring board 8.
- the present disclosure is not limited to the above-described embodiment, and for example, the following modifications or expansions are possible.
- the number of turns of the coil L and the coil width w may be changed as appropriate.
- an embodiment has been described in which an induced electromotive voltage corresponding to the source current Is is superimposed on the gate applied voltage Vgin by mounting the multilayer wiring board 8 in close contact with the main current wiring 6 for the source current Is.
- the multilayer wiring board 8 is mounted in close contact with the main current wiring 5 for the drain current Id, and an induced electromotive voltage corresponding to the drain current Id is superimposed on the gate applied voltage Vgin.
- the layers of the multilayer wiring layer 8 (for example, the first layer 8a and the first layer 8)
- the coil L may be configured using a via that couples any one of the two layers 8b, the second layer 8b and the third layer 8c, and the third layer 8c and the fourth layer 8d.
- the present disclosure is applied to the drive circuit 1 for driving the inductive load 2, but the present disclosure is not limited to this, and the present disclosure drives a circuit including the switching element M ⁇ b> 1 such as a DCDC converter. It can also be applied to a driving circuit.
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Abstract
Description
以下、第1実施形態に係るスイッチング素子M1の駆動回路1について図1~図8を参照しながら説明する。図1に示すように、スイッチング素子M1は、例えばNチャネル型のMOSトランジスタを用いて構成され、誘導性負荷2と直列接続されている。誘導性負荷2には還流ダイオードDが並列接続されている。
本開示の第2実施形態に係るスイッチング素子の駆動回路について、図9(a)~図9(d)を参照して説明する。
本開示の第3実施形態に係るスイッチング素子の駆動回路について図10を参照して説明する。
(第4実施形態)
本開示の第4実施形態に係るスイッチング素子の駆動回路について図11を参照して説明する。図11に示すように、コイルLの一端子Lt1および他端子Lt2間には、ツェナーダイオードD1およびD2が互いに逆方向に接続されている。すると、コイルLに誘導起電圧が過大に生じたときに誘導起電圧を所定電圧でクランプできる。
本開示の第5実施形態に係るスイッチング素子の駆動回路について図12を参照して説明する。
本開示の第6実施形態に係るスイッチング素子の駆動回路について図13を参照して説明する。本実施形態では、コイルLが主電流配線に埋め込まれている。
本開示は、前記の実施形態に限定されるものではなく、例えば、以下に示す変形又は拡張が可能である。コイルLの巻数、コイル幅wは適宜変更しても良い。ソース電流Is用の主電流配線6の上に多層配線板8を密着して搭載することで、ソース電流Isに応じた誘導起電圧をゲート印加電圧Vginに重畳させる実施形態を示したが、これに限られるものではなく、例えば、ドレイン電流Id用の主電流配線5の上に多層配線板8を密着して搭載し、ドレイン電流Idに応じた誘導起電圧をゲート印加電圧Vginに重畳させるようにしても良い。
Claims (10)
- 信号源(S)から送信されるパルス信号に応じてオンオフ制御され主電流が流れるスイッチング素子(M1)と、
平坦面を備え前記スイッチング素子(M1)の主電流を通電する主電流配線(6)と、
前記主電流配線(6)の前記平坦面に搭載される平坦面を有し、コイル(L)が内部に配設された基板と、を備え、
前記コイル(L)は、前記スイッチング素子(M1)の主電流に応じて生じる磁束と鎖交するように配設されると共に、前記信号源(S)のパルス信号を受信して前記スイッチング素子(M1)の制御端子(M1d)に送信するように電気的に接続されていることを特徴とする駆動回路。 - 前記スイッチング素子(M1)の制御端子(M1g)に電気的に接続されたゲート抵抗(Rg)をさらに備え、
前記コイル(L)は、前記ゲート抵抗(Rg)と直列接続されていることを特徴とする請求項1に記載の駆動回路。 - 前記コイル(L)の巻回端部間は前記主電流配線(6)の配線幅以下の長さであり、前記コイル(L)は前記主電流配線(6)の配線幅内に設置されていることを特徴とする請求項1または2に記載の駆動回路。
- 前記基板は多層配線板(8,13)を備え、
前記コイル(L)は、前記多層配線板(8)の複数の各層に形成された配線パターン(10)と当該各層の配線パターン(10)をループ状に結合するビア(H1~H15)とを組み合わせて形成されることを特徴とする請求項1ないし3の何れかに記載の駆動回路。 - 前記コイル(L)は、前記多層配線板(8,13)内に互いに逆方向ループ状に巻回された部分コイルを複数直列接続して構成されることを特徴とする請求項4に記載の駆動回路。
- 前記多層配線板(8)は、第1層(8a)、第2層(8b)、第3層(8c)および第4層(8d)を順に備え、
前記コイル(L)は、前記多層配線板内(8)の第1層(8a)と第3層(8c)にそれぞれ形成された配線パターン(10)をビア(H1~H7)によって構造的に接続した第1部分コイル(L1)と、前記第1部分コイル(L1)とは逆方向に巻回され前記多層配線板(8)内の第2層(8b)と第4層(8d)にそれぞれ形成された配線パターン(10)をビア(H8~H15)によって構造的に接続した第2部分コイル(L2)とを備えることを特徴とする請求項5に記載の駆動回路。 - 前記多層配線板(13)は、前記コイル(L)と共に前記主電流配線(6)を組み込んで構成されることを特徴とする請求項4ないし6の何れかに記載の駆動回路。
- 前記スイッチング素子(M1)の制御端子に接続すると共に前記主電流配線(6)が形成された主電流通電基板(4)に形成された制御端子接続配線パターン(7)をさらに備え、
前記制御端子接続配線パターン(7)と前記主電流配線(6)との間にスリット(12)が設けられていることを特徴とする請求項1ないし7の何れかに記載の駆動回路。 - 前記コイル(L)に生じる誘導起電圧をクランプするツェナーダイオード(D1,D2)をさらに備えたことを特徴とする請求項1ないし8の何れかに記載の駆動回路。
- 前記信号源(S)をさらに備えたことを特徴とする請求項1ないし9の何れかに記載の駆動回路。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US14/353,890 US9203399B2 (en) | 2011-11-24 | 2012-10-24 | Drive circuit for switching element |
DE112012004901.2T DE112012004901B4 (de) | 2011-11-24 | 2012-10-24 | Antriebsschaltung für ein Schaltelement |
Applications Claiming Priority (2)
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JP2011-256147 | 2011-11-24 | ||
JP2011256147A JP5316628B2 (ja) | 2011-11-24 | 2011-11-24 | スイッチング素子の駆動回路 |
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PCT/JP2012/006810 WO2013076916A1 (ja) | 2011-11-24 | 2012-10-24 | スイッチング素子の駆動回路 |
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US (1) | US9203399B2 (ja) |
JP (1) | JP5316628B2 (ja) |
DE (1) | DE112012004901B4 (ja) |
WO (1) | WO2013076916A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2015053604A (ja) * | 2013-09-06 | 2015-03-19 | 株式会社オートネットワーク技術研究所 | 負荷駆動回路 |
US9373570B2 (en) | 2013-05-23 | 2016-06-21 | Denso Corporation | Semiconductor module and driving device for switching element |
JPWO2017199580A1 (ja) * | 2016-05-19 | 2018-08-09 | 富士電機株式会社 | 絶縁ゲート型半導体装置及び絶縁ゲート型半導体装置の製造方法 |
Families Citing this family (4)
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DE102016222268A1 (de) * | 2016-11-14 | 2018-05-17 | Hochschule Reutlingen | Vorrichtung und Verfahren zur selbstverstärkenden Ansteuerung eines ladungsgesteuerten Schaltelements sowie Verwendung eines Transformators |
JP6513245B2 (ja) * | 2017-03-02 | 2019-05-15 | 株式会社日立製作所 | 半導体スイッチング装置のゲート電流を制御する回路 |
JP7505450B2 (ja) | 2021-06-14 | 2024-06-25 | 株式会社豊田自動織機 | 電力変換装置 |
JP7524853B2 (ja) | 2021-07-15 | 2024-07-30 | 三菱電機株式会社 | 半導体装置 |
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JP3409620B2 (ja) | 1997-01-31 | 2003-05-26 | 日産自動車株式会社 | スイッチング素子用駆動回路およびインバータ装置 |
JP2006025071A (ja) | 2004-07-07 | 2006-01-26 | Mitsubishi Electric Corp | 駆動回路 |
JP5633917B2 (ja) * | 2009-03-03 | 2014-12-03 | 東光東芝メーターシステムズ株式会社 | 電流検出装置およびこれを用いた電力量計 |
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- 2011-11-24 JP JP2011256147A patent/JP5316628B2/ja not_active Expired - Fee Related
-
2012
- 2012-10-24 US US14/353,890 patent/US9203399B2/en not_active Expired - Fee Related
- 2012-10-24 WO PCT/JP2012/006810 patent/WO2013076916A1/ja active Application Filing
- 2012-10-24 DE DE112012004901.2T patent/DE112012004901B4/de not_active Expired - Fee Related
Patent Citations (4)
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JPH08298211A (ja) * | 1995-04-27 | 1996-11-12 | Canon Inc | プリントインダクタ |
JP2000134075A (ja) * | 1998-08-18 | 2000-05-12 | Pop Denshi Kk | スイッチ装置 |
JP2004063687A (ja) * | 2002-07-26 | 2004-02-26 | Mitsubishi Electric Corp | パワーモジュールのゲート駆動回路 |
JP2008235997A (ja) * | 2007-03-16 | 2008-10-02 | Mitsubishi Electric Corp | スイッチング回路 |
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Publication number | Priority date | Publication date | Assignee | Title |
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US9373570B2 (en) | 2013-05-23 | 2016-06-21 | Denso Corporation | Semiconductor module and driving device for switching element |
JP2015053604A (ja) * | 2013-09-06 | 2015-03-19 | 株式会社オートネットワーク技術研究所 | 負荷駆動回路 |
JPWO2017199580A1 (ja) * | 2016-05-19 | 2018-08-09 | 富士電機株式会社 | 絶縁ゲート型半導体装置及び絶縁ゲート型半導体装置の製造方法 |
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US20140306739A1 (en) | 2014-10-16 |
JP2013110684A (ja) | 2013-06-06 |
JP5316628B2 (ja) | 2013-10-16 |
DE112012004901B4 (de) | 2017-10-26 |
US9203399B2 (en) | 2015-12-01 |
DE112012004901T5 (de) | 2014-09-11 |
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