KR20150073133A - Transformer and adapter - Google Patents

Abstract

The transformer of the present invention comprises: a primary coil unit comprising a plurality of substrates in which a coil pattern is formed; a secondary coil unit including an insulated coil; and a shielding unit formed on the primary coil unit and including one or more substrates in which a shielding pattern is formed.

Description

Transformer and adapter

The present invention relates to a transformer and an adapter.

The use of portable electronic devices including portable telephones is becoming common.

These portable electronic devices include a rechargeable battery so that the portable electronic device can operate even when no external power is supplied. In addition, the portable electronic device includes a power input terminal for charging a built-in rechargeable battery from an external power source.

On the other hand, the external power source is not suitable for small appliances such as portable electronic devices because it supplies currents suitable for large home appliances. Therefore, a separate adapter is required to use the external power source as the power source of the portable electronic device.

The adapter includes a transformer that transforms the external power source to a voltage suitable for the portable electronic device. Here, the transformer is the part that plays the main function of the adapter and it determines the size of the adapter. Therefore, it is necessary to develop a transformer having a simple structure in order to miniaturize the adapter and improve the quality thereof.

For reference, Patent Documents 1 and 2 are the prior art related to the present invention.

KR 2006-0027505 A US 2009-0295528 A1

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transformer that can be easily miniaturized.

In addition, the present invention has another object to provide an adapter capable of miniaturization.

According to an aspect of the present invention, there is provided a transformer comprising: a primary coil part including a plurality of substrates on which coil patterns are formed; A secondary coil portion including an isolated coil; And a shielding portion formed on the primary coil portion and including at least one substrate on which a shielding pattern is formed.

In the transformer according to an embodiment of the present invention, the area of the shielding pattern may be larger than the area of the coil pattern of the primary coil part that is the same as or adjacent to the area of the coil pattern of the adjacent primary coil part.

In the transformer according to the embodiment of the present invention, the width of the curve forming the shielding pattern may be different from the width of the curve forming the coil pattern of the adjacent primary coil part.

In a transformer according to an embodiment of the present invention, the shielding pattern may be in the form of an open curve with one portion open.

In the transformer according to an embodiment of the present invention, the shield pattern may be formed along the edge of the substrate of the shield.

In the transformer according to an embodiment of the present invention, the shielding pattern may be a single curved line.

In the transformer according to an embodiment of the present invention, the shielding pattern may be formed of a plurality of curved lines.

In the transformer according to an embodiment of the present invention, the shield pattern may be connected to the coil pattern of the primary coil part.

In the transformer according to an embodiment of the present invention, the shield pattern may be connected to the core portion.

In the transformer according to an embodiment of the present invention, the shield may include: a first shield formed on one side of the primary coil portion; And a second shield formed on the other side of the primary coil portion.

In the transformer according to an embodiment of the present invention, the first shield may be connected to the second shield by a via electrode passing through the first coil part.

In the transformer according to an embodiment of the present invention, the coil pattern of the primary coil part may be a curved line.

In the transformer according to an embodiment of the present invention, the substrate of the primary coil part may include a plurality of via electrodes.

In the transformer according to an embodiment of the present invention, the via electrode of the primary coil part may be equal to the number of the substrates constituting the primary coil part or may be larger than the number of the substrates constituting the primary coil part.

In the transformer according to an embodiment of the present invention, the coil of the secondary coil part may be coated with a triple insulation material.

The transformer according to an embodiment of the present invention may further include a tertiary coil portion including at least one substrate on which a coil pattern is formed.

In the transformer according to an embodiment of the present invention, the shield pattern may be connected to the coil pattern of the third coil part.

In the transformer according to an embodiment of the present invention, the number of coil windings formed by the coil pattern of the primary coil part may be larger than the number of coil windings formed by the coils of the secondary coil part.

According to an aspect of the present invention, there is provided an adapter including: a circuit board; And a transformer mounted on the circuit board, wherein the transformer includes a primary coil part including a plurality of substrates on which a coil pattern is formed, a secondary coil part including an insulated coil, And a shielding portion that includes at least one substrate on which a shielding pattern is formed.

In an adapter according to an embodiment of the present invention, the transformer may be arranged such that the plurality of boards are vertically arranged with respect to a plane of the circuit board.

The adapter may further include a filter component mounted on the circuit board in an adapter according to an embodiment of the present invention.

In an adapter according to an embodiment of the present invention, the filter component is disposed at one side edge of the circuit board, and the transformer may be disposed at the other side edge of the circuit board facing the one side edge.

The adapter according to an embodiment of the present invention may further include a capacitor disposed between the filter part and the transformer.

The adapter according to an embodiment of the present invention may further include a power output terminal arranged in parallel along the length or the width direction of the transformer.

The present invention can provide a transformer that can be easily downsized.

In addition, the present invention can provide an adapter that can be easily miniaturized.

1 is an exploded perspective view of a transformer according to an embodiment of the present invention,
FIG. 2 is a plan view showing sequentially the shielding part and the substrates constituting the primary coil part shown in FIG. 1,
FIG. 3 is an enlarged view of the shielding portion and the first substrate of the secondary coil portion shown in FIG. 2,
Figs. 4 to 8 are plan views showing another embodiment of the shielding portion shown in Fig. 2,
9 is an exploded perspective view of a transformer according to another embodiment of the present invention,
10 is a plan view showing sequentially the substrates constituting the first shield portion, the third coil portion, the first coil portion, and the second shield portion shown in FIG. 9,
11 is a plan view showing a configuration according to another form of the first shield portion, the third coil portion, the first coil portion, and the second shield portion shown in FIG. 9,
12 is an enlarged view of the first shielding portion and the second shielding portion shown in FIG. 11,
13 is a configuration diagram of an adapter according to an embodiment of the present invention,
14 is a configuration diagram showing another form of the adapter shown in Fig. 13,
15 to 17 are graphs showing the performance of a transformer according to an embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the present invention, it is to be understood that the terminology used herein is for the purpose of describing the present invention only and is not intended to limit the technical scope of the present invention.

In addition, throughout the specification, a configuration is referred to as being 'connected' to another configuration, including not only when the configurations are directly connected to each other, but also when they are indirectly connected with each other . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

FIG. 1 is a perspective view of a transformer according to an embodiment of the present invention, FIG. 2 is a plan view showing sequentially the substrates constituting the shield part and the primary coil part shown in FIG. 1, 4 is a plan view showing another embodiment of the shield shown in Fig. 2, and Fig. 9 is a plan view of a transformer according to another embodiment of the present invention. Fig. 10 is a plan view showing sequentially the substrates constituting the first shield portion, the third coil portion, the first coil portion, and the second shield portion shown in FIG. 9, and FIG. 11 is a plan view FIG. 12 is a plan view showing an enlarged view of the first shielding portion and the second shielding portion shown in FIG. 11, and FIG. 12 is an enlarged plan view of the first shielding portion and the second shielding portion shown in FIG. 13 is a configuration diagram of an adapter according to an embodiment of the present invention, It indicated a configuration showing another configuration of the adapter, and Fig. 15 to Fig. 17 is a graph showing the performance of a transformer in accordance with one embodiment.

(Transformers)

A transformer according to an embodiment of the present invention will be described with reference to FIGS.

The transformer 100 according to the present embodiment may include a primary coil portion 110, a secondary coil portion 120, a shield portion 140, and a core portion 170. In addition, the transformer 100 may further include an insulating sheath (not shown) to satisfy a safety standard. For example, the insulating coating may be in the form of a tape wrapping around the core portion 170. Alternatively, the insulating coating may be an insulating film attached to the core portion 170.

The transformer 100 configured as described above can be used to convert the voltage or current of the external power source into a voltage or current suitable for an electronic device. For example, the transformer 100 may be used in a portable electronic device or an adapter for a portable electronic device.

In the following, the main configuration of the transformer 100 will be described.

The primary coil part 110 can be made in a plate shape. For example, the primary coil portion 110 may be in the form of a substrate. In other words, the primary coil part 110 may be formed of a plurality of substrates having coil patterns formed thereon. Here, the number of windings of the coil formed by the coil pattern of the primary coil portion 110 may be different from the number of coil windings of the secondary coil portion 120. For example, the number of turns of the coil formed by the coil pattern of the primary coil section 110 may be greater than the number of coil turns of the secondary coil section 120. However, the opposite may be possible.

The secondary coil part 120 may be in the form of a bundle which is wound a predetermined number of times with a wire made of copper or other metal. Here, the wire may be coated with an insulating material or may be coated. For example, the wire may be coated with a triple insulation material. However, the surface of the wire is not necessarily covered or coated with an insulating material. For example, in the case where a separate insulating tape is wound between the wire and the wire, the insulating coating may be omitted. For reference, in the present embodiment, the secondary coil part 120 may be formed of a coil coated with a triple insulation material. However, the secondary coil part 120 can be constituted by a coil coated with a single insulation material or a double insulation material in a range satisfying the safety standard.

The shield 140 may be fabricated in the form of a substrate. For example, the shield 140 may be fabricated in the same or similar form as the primary coil portion 110. The shield 140 may be formed in the primary coil portion 110. For example, the shield 140 may be integrally formed on one surface of the primary coil portion 110. Therefore, the shielding portion 140 can be fabricated together through the manufacturing process of the primary coil portion 110.

The shield 140 may be disposed between the primary coil portion 110 and the secondary coil portion 120. In this case, the electromagnetic wave interference phenomenon occurring between the primary coil part 110 and the secondary coil part 120 can be reduced. In addition, the shield 140 may be disposed outside the primary coil portion 110 as shown in FIG. In this case, the electromagnetic wave interference phenomenon generated from the primary coil portion 110 can be reduced. However, the formation position of the shielding portion 140 is not limited to the above-described example, and may be disposed on both sides of the primary coil portion 110 or in the middle of the primary coil portion 110 as necessary.

The core portion 170 may be made of a material having a ferrite structure. However, the material of the core portion 170 is not limited to ferrite, and may be changed to other materials. The core portion 170 penetrates the center of at least one of the outer circumferences surrounding the primary coil portion 110 and the secondary coil portion 120 and at least one of the primary coil portion 110 and the secondary coil portion 120 ≪ / RTI > However, the shape of the core portion 170 is not limited to the above-described shape. For example, the core portion 170 may be modified to have only a foreign body.

Next, the primary coil part 110 and the shielding part 140 will be described in detail with reference to FIGS. 2 and 3. FIG.

The shield 140 and the primary coil portion 110 may be fabricated in the form of a substrate. For example, the shielding portion 140 and the primary coil portion 110 may be composed of a substrate 142, 1121, 1122, 1123, 1124, 1125, 1126, 1127 having a metal pattern as shown in FIG. 2 . Here, the sizes of the substrates 142, 1121, 1122, 1123, 1124, 1125, 1126, and 1127 may all be the same. However, substrates of different sizes may be included if desired.

The shield 140 and the primary coil part 110 may be integrally formed. For example, the substrate 142 of the shielding portion 140 and the substrates 1121, 1122, 1123, 1124, 1125, 1126, and 1127 of the primary coil portion 110 are sequentially stacked to form one structure .

In the following, the shielding part 140 and the primary coil part 110 constructed based on a substrate will be described in the order of lamination.

The shield 140 may include a substrate 142, a shielding pattern 144, and a plurality of via electrodes 146. The shield 140 configured as described above may be formed in the primary coil part 110 to minimize electromagnetic interference.

The substrate 142 may be made of a prepreg material. However, the material of the substrate 140 is not limited to the prepreg. For example, the substrate 142 can be changed to a material that is easy to mold and process.

The shielding pattern 144 may be formed of an open-shaped curve in which a portion is opened. For example, the shielding pattern 144 may be horseshoe or annular. However, the shape of the shielding pattern 1440 is not limited to the above-described exemplary embodiment. For example, the shape of the shielding pattern 144 may be formed on an adjacent substrate (the first substrate 1101 The shielding pattern 144 may be a shape capable of accommodating the coil pattern 1141 of the first substrate 1101. In this case,

The shielding pattern 144 may have a predetermined width Ws. Here, the width Ws may be substantially the same as the width W1 of the coil pattern 1141 of the first substrate 1101. However, the width Ws is not necessarily the same as the width W1 of the coil pattern 1141, and may be larger or smaller as required (see FIG. 3).

The shielding pattern 144 may have a predetermined area As. Here, the area As may be larger than the area A1 of the coil pattern 1141. However, the area As of the shielding pattern 144 is not necessarily larger than the area A1 of the coil pattern 1141. For example, the area As may be increased or decreased within a range that ensures the shielding performance of the shielding portion 140.

The shielding pattern 144 may be connected to the via electrode 146. For example, one end (start portion) of the shielding pattern 144 may be connected to the ground terminal by the via- Further, the other end (finishing portion) of the shielding pattern 144 may not be connected to any electrode (i.e., can be opened). The connection structure of the shielding pattern 144 can smoothly perform the electromagnetic wave shielding function without affecting the characteristics of the transformer at all.

The via electrode 146 may be formed on the substrate 142. [ For example, a plurality of via electrodes 146 may be formed on the inside and the outside of the shielding pattern 144. In this embodiment, the via-electrode 146 may include a via-electrode 1462 for the first pattern, a via-electrode 1464 for the second pattern, and a via-electrode 1466 for output. Here, the via-electrode 1462 for the first pattern may be formed on the inner side of the shielding pattern 144, and the via-electrode 1464 for the second pattern may be formed on the outer side of the shielding pattern 144. The output via electrode 1466 may be formed at the edge of the substrate 142. [

The primary coil portions 110 1101, 1102, 1103, 1104, 1105, 1106, and 1107 may be formed of a plurality of substrates. For example, the primary coil part 110 includes a first substrate 1121 on which a first coil pattern 1141 is formed, a second substrate 1122 on which a second coil pattern 1142 is formed, A fourth substrate 1124 on which the fourth coil pattern 1144 is formed, a fifth substrate 1125 on which the fifth coil pattern 1145 is formed, a third substrate 1123 on which the fourth coil pattern 1143 is formed, The sixth substrate 1126 on which the pattern 1146 is formed and the seventh substrate 1127 on which the seventh coil pattern 1147 is formed may be successively laminated.

Coil patterns 1141, 1142, 1143, 1144, 1145, 1146, and 1147 may be formed on the respective substrates 1121, 1122, 1123, 1124, 1125, 1126, For example, coil-shaped coil patterns 1141, 1142, 1143, 1144, 1145, 1146, 1147 may be formed on the substrates 1121, 1122, 1123, 1124, 1125, 1126, Here, the number of windings of the coil patterns 1141, 1142, 1143, 1144, 1145, 1146, and 1147 may all be the same. However, the number of windings of the coil patterns 1141, 1142, 1143, 1144, 1145, 1146, and 1147 is not necessarily the same. For example, at least one of the coil patterns 1141, 1142, 1143, 1144, 1145, 1146, 1147 may be adjusted to match the number of windings of the primary coil portion 110 to a predetermined value.

In addition, via electrodes 1161, 1162, 1163, 1164, 1165, 1166 and 1167 may be formed on the respective substrates 1121, 1122, 1123, 1124, 1125, 1126, For example, via-electrodes 1171, 1172, 1173, 1174, 1175, 1176, and 1177 for the first pattern, vias for the second pattern 1171, 1172, 1173, and 1177 for the first pattern are formed on the respective substrates 1121, 1122, 1123, 1124, 1125, 1126, The electrodes 1181, 1182, 1183, 1184, 1185, 1186 and 1187 and the output via electrodes 1191, 1192, 1193, 1194, 1195, 1196 and 1197 can be formed. The via electrodes 1161, 1162, 1163, 1164, 1165, 1166, and 1167 may be formed to penetrate through the substrates 1121, 1122, 1123, 1124, 1125, 1126, and 1127.

Therefore, the coil patterns 1141, 1142, 1143, 1144, 1145, 1146, and 1147 formed on the different substrates 1121, 1122, 1123, 1124, 1125, 1126, and 1127 are electrically connected to the via electrodes 1161, 1162, 1164, 1165, 1166, and 1167, respectively. For example, each of the coil patterns 1141, 1142, 1143, 1144, 1145, 1146, and 1147 may be connected as a single curve by via electrodes 1161, 1162, 1163, 1164, 1165, 1166, . One end of each coil pattern 1141, 1142, 1143, 1144, 1145, 1146, and 1147 is connected to one via-side electrode for pattern 1171, 1172, 1173, 1174, 1175, 1176, 1177, 1181, 1182 , 1183, 1184, 1185, 1186, 1187).

On the other hand, the pattern via electrodes 1171, 1172, 1173, 1174, 1175, 1176, 1177, 1181, 1182, 1183, 1184 and 1185 formed on the respective substrates 1121, 1122, 1123, 1124, 1125, 1126, 1186 and 1187 may be equal to or greater than the number of the substrates 1121, 1122, 1123, 1124, 1125, 1126, and 1127 constituting the primary coil portion 110. For example, if the primary coil portion 110 is composed of seven substrates, the number of via-electrodes for patterns formed on each substrate may be seven or more. However, the output via electrodes 1191, 1192, 1193, 1194, 1195, 1196, and 1197 can be arbitrarily selected in a range of two or more.

Next, another form of the shield will be described with reference to Figs.

The shield 140 according to an embodiment may have a structure in which the shielding pattern 144 and the via electrode 146 are connected (see FIG. 4). For example, the shielding pattern 144 may be connected to the ground terminal of the circuit board via the via- 4, the shield pattern 144 is shown as being connected to the second pattern via electrode 1464, but it may be connected to the first pattern via electrode 1462 or the output via electrode 1466. [

A shield 140 according to another form may have a shielding pattern 144 having an extended area (see FIG. 5). For example, the shielding pattern 144 may cover a substantial area of the substrate 142.

The shielding portion 140 according to another embodiment may have a curled shielding pattern 144 (see FIG. 6). For example, the shielding pattern 144 may have a shape similar to that of the coil patterns 1141, 1142, 1143, 1144, 1145, 1146, 1147 of the primary coil portion 110. That is, the shielding pattern 144 may be formed by winding a single curve more than once.

The shielding portion 140 according to another embodiment may have a shielding pattern 144 composed of a plurality of curves (see FIG. 7). For example, the shielding pattern 144 may be composed of two curves. That is, the shielding pattern 144 may be a shape in which one curve is divided into a plurality of curves.

The transformer 100 thus configured may be advantageous in simplifying the core assembly process after fabrication and MLB (Multilayer PCB) fabrication. In addition, the present transformer 100 can reduce the characteristic deviation as compared with the winding type transformer. In addition, since the transformer 100 can maintain a stable characteristic value through the shielding part 140, EMI characteristics, which is a problem of the plate-type transformer, can be improved.

Next, a transformer according to another embodiment of the present invention will be described with reference to FIGS. 9 to 12. FIG. For reference, the same constituent elements as those in the above-described embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.

The transformer 100 according to the present embodiment can be distinguished from the above-described embodiment in the configuration of the shielding portion. For example, the transformer 100 according to the present embodiment may include a plurality of shielding portions 150 and 160. In other words, the shielding portion may include the first shielding portion 150 and the second shielding portion 160. The first shielding part 150 may be formed on one side of the primary coil part 110 and the second shielding part 160 may be formed on the other side of the primary coil part 110.

In addition, the transformer 100 according to the present embodiment may further include a tertiary coil portion 130. For example, the tertiary coil portion 130 may be formed between the first shield portion 150 and the primary coil portion 110. However, the formation position of the tertiary coil section 130 is not limited to the above-described form. For example, the third coil portion 130 may be formed between the first coil portion 110 and the second shield portion 160. Alternatively, the tertiary coil portion 130 may be formed on the outer side of the first shielding portion 150 or on the outer side of the second shielding portion 160.

The tertiary coil portion 130 may include a substrate 132, a coil pattern 134, and via electrodes 136 (1362, 1364, 1366) as shown in FIG. That is, the tertiary coil section 130 may have a shape substantially similar to that of the primary coil section 110. The tertiary coil 130 thus configured is connected with the first shield 150, the primary coil 110 1101, 1102, 1103, 1104, 1105, 1106, 1107, the second shield 160 Or may be integrally formed.

The thus constructed tertiary coil portion 130 can be used for obtaining an induced electromotive force from the power supplied from the primary coil portion 110 or the secondary coil portion 120 (i.e., VCC application). For example, the tertiary coil part 130 can supply the power obtained from the primary coil part 110 to the standby power of the electronic device in which the transformer according to the present embodiment is mounted. For reference, the electronic device may be an adapter for a portable electronic device.

Next, another form of the shielding portions 150 and 160 will be described with reference to Figs. 11 and 12. Fig.

The first shielding part 150 and the second shielding part 160 may be connected via the via electrodes 156, 136, 1161, 1162, 1163, 1164, 1165, 1166, 1167, 166. For example, the first shield 150 may be connected to the via electrode 1562, and the second shield 160 may be connected to the via electrode 1662. Here, since the via electrodes 1562 and 1662 are vertically overlapped with each other in the laminated state, the first shielding part 150 and the second shielding part 160 can be electrically connected to each other.

Meanwhile, the first shielding part 150 and the second shielding part 160 may have different shapes. For example, the shielding pattern 154 of the first shielding portion 150 may have a curved shape with one side opened, and the shielding pattern 164 of the second shielding portion 160 may be curled at least twice have. However, the shielding pattern 154 of the first shielding part 150 and the shielding pattern 164 of the second shielding part 160 do not necessarily have to be different. For example, the shielding pattern 154 of the first shielding part 150 and the shielding pattern 164 of the second shielding part 160 may have the same shape.

The shielding pattern 154 of the first shielding part 150 and the shielding pattern 164 of the second shielding part 160 may be connected. For example, one end of the shielding pattern 154 and one end of the shielding pattern 164 may be connected by the via-electrodes 1562 and 1662. In addition, the other end of the shielding pattern 154 and the other end of the shielding pattern 164 can be opened. The shielding portions 150 and 160 having such a shielding pattern are advantageous in that the shielding function can be smoothly performed without affecting the product characteristics of the transformer.

Therefore, the transformer 100 according to the present embodiment can induce substantially the same or similar characteristics as the EMI shield using the wire through the two shields 150 and 160. In addition, the transformer 100 may be advantageous in simplifying the fabrication process and core assembly process after MLB (Multilayer PCB) fabrication. In addition, since the transformer 100 has a characteristic deviation smaller than that of the wire-wound transformer, stable characteristics can be maintained. Therefore, the present transformer 100 can effectively improve the EMI characteristic, which is a problem of the plate-form transformer.

(adapter)

Hereinafter, an adapter according to an embodiment of the present invention will be described with reference to FIGS. 13 and 14. FIG. For reference, the transformer described below may be any of the transformers described above, and a detailed description thereof will be omitted.

The adapter 10 according to the present embodiment may include a transformer 100, a circuit board 200, a filter component 300, a capacitor 400, and a power output terminal 500.

The circuit board 200 may be mounted inside the adapter 10. [ For example, the circuit board 200 may be mounted in an internal space formed by a case (not shown) of the adapter 10. [ In addition, the circuit board 200 may be formed integrally with the case of the adapter 10. For example, the circuit board 200 may form a portion of the case.

A circuit pattern may be formed on the circuit board 200. For example, a circuit pattern connecting the transformer 100, the filter component 300, the capacitor 400, and the power output terminal 500 may be formed on the circuit board 200. In addition, the circuit board 200 may be further provided with another circuit pattern for connecting electronic components (for example, resistors, etc.) other than the above-described electronic components.

The transformer 100 may be mounted parallel to the plane of the circuit board 200. For example, the transformer 100 is mounted on the circuit board 200 such that the circuit boards 200 and the substrates 1121, 1122, 1123, 1124, 1125, 1126, and 1127 of the primary coil unit 110 are arranged in parallel. (See Fig. 13).

Alternatively, the transformer 100 may be mounted perpendicular to the plane of the circuit board 200. 1122, 1123, 1124, 1125, 1126, and 1127 of the transformer 100 are disposed on the circuit board 200 so that the substrates 1121, 1122, 1123, (See Fig. 14).

The transformer 100 may be disposed at the edge of the circuit board 200. In addition, the transformer 100 may be disposed in a diagonal direction with the filter component 300. For example, the transformer 100 may be disposed at one side edge of the circuit board 200, and the filter component 300 may be disposed at the other side edge facing the edge (see FIG. 14). This arrangement can be advantageous for releasing heat generated from the coil components (transformer 100 and filter component 300) to the surroundings.

In addition, a capacitor 400 may be disposed between the transformer 100 and the filter component 300. Such an arrangement structure may be advantageous to efficiently utilize the space between the transformer 100 and the filter part 300.

In addition, the transformer 100 may be disposed on the same plane as the power output terminal 500 on the circuit board 200. Such an arrangement structure may be advantageous for optimizing the circuit pattern of the circuit board 200. [

The adapter 10 according to the present embodiment configured as described above may be advantageous for maintaining the safety standard of the transformer 100. [ In addition, the adapter 10 according to the present embodiment can be advantageous for downsizing the product, and may be advantageous for improving the electromagnetic wave shielding property.

This adapter 10 exhibited generally excellent EMI characteristics as shown in Figs. 15 to 17. Particularly, when the shields 150 and 160 of the transformer 100 are connected to the core, better EMI characteristics are exhibited. In addition, when the snubber circuit is formed in the adapter 10, the leakage phenomenon can be reduced. For reference, in the present embodiment, the snubber circuit may include a chip resistor and an MLCC.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions And various modifications may be made.

10 adapter
200 circuit board
300 filter parts
400 capacitor
500 power output terminal
100 transformer
110, 1101 to 1107 primary coils
1121 to 1127 (of the primary coil part)
1141 to 1147 (primary coil part) coil pattern
1161 to 1167 (of the primary coil part) via electrode
120 Secondary coil part
130 third coil part
132 (of the third coil part)
134 (of the third coil part) coil pattern
136 (of the third coil part) via electrode
140 shielding portion
142 (shielding portion) substrate
144 (shielded) coil pattern
146 (shielded) Via electrode
150 first shielding portion
160 Second shielding part
170 core portion
W1 (of primary coil partial coil pattern) W1
A1 (of coil pattern)
Ws (of shielding coil pattern) Width
As (area of shielding coil pattern)

Claims (6)

A circuit board; And
A transformer mounted on the circuit board;
Lt; / RTI >
The transformer includes a primary coil portion including a plurality of substrates on which a coil pattern is formed, a secondary coil portion including an insulated coil, and one or more substrates formed on the primary coil portion and on which a shielding pattern is formed And a shielding portion for shielding the shielding portion. The method according to claim 1,
Wherein the transformer is such that the plurality of substrates are vertically disposed relative to a plane of the circuit board. The method according to claim 1,
Further comprising a filter component mounted to the circuit board. The method of claim 3,
Wherein the filter component is disposed at one side edge of the circuit board,
Wherein the transformer is disposed at the other side edge of the circuit board facing the one side edge. The method of claim 3,
And a capacitor disposed between the filter component and the transformer. The method according to claim 1,
And a power output terminal arranged in parallel along the length or width direction of the transformer.

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