Adapter power supply

Abstract

An adapter power supply includes a circuit board, an electromagnetic interference filter, a shield, a power factor correction inductor, a transformer, and a plurality of heat generating elements. The circuit board has opposite front and back surfaces, mutually parallel first and second long sides, and the front surface of the circuit board is sequentially divided into a first region, a second region, and a third region in the extension direction of the first long side. The electromagnetic interference filter is disposed in the first region and close to the first long side. The shield is disposed in the first region and close to the electromagnetic interference filter. The power factor correction inductor is disposed in the first region and close to the second long side. The power factor correction inductor has a first long axis. The transformer is disposed in the third region and close to the first long side. The transformer has a second long axis, and the first long axis is perpendicular to the second long axis. The plurality of heat generating elements are disposed on the back surface of the circuit board.

Description

Technical Field

[0001] This invention relates to a power supply, and more particularly to an adapter power supply. Background Technology

[0002] Power adapters are widely used in portable electronic products such as laptops and game consoles. Their power output depends on the electrical parameters and dimensions of the electronic components inside the power adapter, such as power factor correction transistors, bridge rectifiers, power factor correction inductors, capacitors, and transformers.

[0003] With the advancement and development of technology, consumers are increasingly demanding that electronic products such as laptops and game consoles be thin, light, and compact. Therefore, research will focus on how to reduce the overall size of power adapters without compromising their power output, thus achieving the desired thinness and compactness of electronic products and meeting consumer needs. Summary of the Invention

[0004] This invention provides an adapter power supply that can effectively improve the space utilization and power density of the circuit board.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: An adapter power supply is provided, comprising a circuit board, an electromagnetic interference filter, a shielding component, a power factor correction inductor, a transformer, and a plurality of heating elements. The circuit board has a front and a back side facing each other, and a first long side and a second long side parallel to each other. The front side of the circuit board is sequentially divided into a first region, a second region, and a third region along the extension direction of the first long side. The electromagnetic interference filter is disposed in the first region of the circuit board and close to the first long side. The shielding component is disposed in the first region of the circuit board and close to the electromagnetic interference filter. The power factor correction (PFC) inductor is disposed in the first region of the circuit board and close to the second long side. The power factor correction inductor has a first long axis. The transformer is disposed in the third region of the circuit board and close to the first long side. The transformer has a second long axis, wherein the first long axis of the power factor correction inductor is perpendicular to the second long axis of the transformer. The plurality of heating elements are disposed on the back side of the circuit board.

[0006] In one embodiment of the present invention, the adapter power supply further includes a first capacitor disposed on the circuit board across the second and third regions and close to the second long side.

[0007] In one embodiment of the invention, the adapter power supply described above includes a first capacitor having a third major axis. The third major axis of the first capacitor is perpendicular to the second major axis of the transformer.

[0008] In one embodiment of the present invention, the adapter power supply further includes a second capacitor, a half-bridge resonant capacitor and a half-bridge resonant inductor, disposed in the second area of ​​the circuit board and located between the electromagnetic interference filter and the transformer.

[0009] In one embodiment of the present invention, the adapter power supply described above includes a second capacitor close to the first long side, a half-bridge resonant capacitor farther from the first long side than the second capacitor, and a half-bridge resonant inductor located between the second capacitor and the half-bridge resonant capacitor.

[0010] In one embodiment of the present invention, the adapter power supply described above includes a half-bridge resonant capacitor with a fourth major axis and a half-bridge resonant inductor with a fifth major axis. The fourth major axis is perpendicular to the fifth major axis.

[0011] In one embodiment of the invention, the adapter power supply described above has a fifth major axis parallel to the second major axis.

[0012] In one embodiment of the present invention, the adapter power supply described above includes a bridge rectifier switch, a power factor correction transistor and / or a half-bridge resonant transistor, wherein the bridge rectifier switch is located on the back side corresponding to the first region.

[0013] In one embodiment of the present invention, the aforementioned adapter power supply further includes an input plug, wherein the circuit board has a first short side and a second short side that are parallel to each other. The input plug is located in a first area of ​​the circuit board, and is close to the first long side and the first short side. The shielding is L-shaped and is located between the electromagnetic interference filter and the power factor correction inductor, and also between the electromagnetic interference filter and the transformer.

[0014] In one embodiment of the present invention, the transformer further includes a wire frame, a coil, a magnetic core, and an insulating cover. The wire frame has a first end and a second end. The first end has a first contact portion, and the second end has a winding hook portion. The coil is wound on the wire frame and has an input end and an output end. The input end is electrically connected to the first contact portion, and the output end contacts the winding hook portion. The magnetic core is assembled with the wire frame and the coil. The insulating cover is fitted over the outside of the wire frame and the magnetic core. The insulating cover has a second contact portion corresponding to the first contact portion, wherein after the output end of the coil contacts the winding hook portion, it passes through the insulating cover and then connects to the second contact portion.

[0015] Based on the above, in the adapter power supply of the present invention, the electromagnetic interference filter and the power factor correction inductor are located in the first region, and the shielding component is disposed in the first region of the circuit board and close to the electromagnetic interference filter. The transformer is located in the third region close to the first long side of the circuit board, and the first long axis of the power factor correction inductor and the second long axis of the transformer are perpendicular to each other. The heating element is disposed on the back of the circuit board. This design allows the adapter power supply of the present invention to reduce its overall size without affecting power output, improve the space utilization of the circuit board to achieve the characteristics of thin and light electronic products and meet consumer needs. Attached Figure Description

[0016] Figure 1 This is a front view of an adapter power supply according to an embodiment of the present invention.

[0017] Figure 2 yes Figure 1 A diagram of the back of the power adapter.

[0018] Figure 3 yes Figure 1 A schematic diagram of the transformer in the adapter power supply.

[0019] Figure 4 yes Figure 3 An exploded view of a transformer.

[0020] Figure 5 yes Figure 3 A cross-sectional view of the transformer.

[0021] [Symbol Explanation] 100: Adapter power supply 110F: Front 111: First short side 113: Second shorter side 115: District 1 117: Third District 130: Shielding components 140L: First Long Wheelbase 150L: Second Long Wheelbase 1501A: First end 1502: Coil 1502B: Output terminal 110: Circuit board 110B: Back 112: First long side 114: Second longest side 116: Second District 120: Electromagnetic Interference Filter 140: Power Factor Corrected Inductor 150: Transformer 1501: Wireframe 1502B: Second end 1502A: Input Terminal 1503: Magnetic Core 1504: Insulating Cover 1506: Winding hook 160: First capacitor 170: Second capacitor 180L: Fourth Long Wheelbase 190L: Fifth Long Wheelbase 210: Bridge rectifier switch 230: Half-bridge resonant transistor 1505: First foot joint 1507: Second foot joint 160L: Third Long Wheelbase 180: Half-bridge resonant capacitor 190: Half-bridge resonant inductor 200: Input plug 220: Power Factor Correction Transistor Detailed Implementation Figure 1 This is a schematic diagram of the front of an adapter power supply according to an embodiment of the present invention. Please refer to... Figure 1 In this embodiment, the adapter power supply 100 includes a circuit board 110, which has a corresponding front side 110F and a back side 110B. Figure 2 ).

[0022] In addition, the circuit board 110 also has a first long side 112 and a second long side 114 that are parallel to each other, and a first short side 111 and a second short side 113 that are parallel to each other. Figure 1 As shown, the circuit board 110 can be sequentially divided into a first region 115, a second region 116, and a third region 117 along the direction of the first long side 112 and the second long side 114. In this embodiment, the first region 115 is larger than the third region 117, and the third region 117 is larger than the second region 116.

[0023] The adapter power supply 100 also includes an electromagnetic interference filter 120, a shield 130, a power factor correction inductor 140, a transformer 150, a first capacitor 160, a second capacitor 170, a half-bridge resonant capacitor 180, and a half-bridge resonant inductor 190 disposed on the front side 110F of the circuit board 110.

[0024] In this embodiment, the electromagnetic interference filter 120 is disposed in the first region 115 of the circuit board 110 near the first long side 112. The power factor correction inductor 140 is disposed in the first region 115 of the circuit board 110 near the second long side 114. The power factor correction inductor 140 has a first long axis 140L. The first long axis 140L of the power factor correction inductor 140 is parallel to the second long side 114, which reduces the space occupied by the power factor correction inductor 140 in the short side direction of the circuit board 110.

[0025] The transformer 150 is located in the third section 117 of the circuit board 110 near the first long side 112. The transformer 150 has a second long axis 150L. The second long axis 150L of the transformer 150 is perpendicular to the first long axis 140L of the power factor correction inductor 140, which reduces the space occupied by the transformer 150 in the long side direction of the circuit board 110.

[0026] In other words, the adapter power supply 100 arranges the larger power factor correction inductor 140 and transformer 150 on the front side 110F of the circuit board 110 with the second major axis 150L perpendicular to the first major axis 140L, which can increase the usable space of the circuit board 110 in the long side or short side direction.

[0027] Furthermore, in this embodiment, the shield 130 is disposed in the first region 115 near the electromagnetic interference filter 120, and is located between the electromagnetic interference filter 120 and the power factor correction inductor 140, and between the electromagnetic interference filter 120 and the half-bridge resonant inductor 190, to block noise emitted by the power factor correction inductor 140, the transformer 150, and the half-bridge resonant inductor 190. The shield 130 is, for example, L-shaped, but in other embodiments, the shield 130 may also be ring-shaped or other shapes.

[0028] The component layout of the adapter power supply 100 can be designed first, and then the larger components can be designed to be arranged on the circuit board 110. The smaller components, such as the first capacitor 160, the second capacitor 170, the half-bridge resonant capacitor 180, and the half-bridge resonant inductor 190, can be arranged on the circuit board 110 to increase the component density on the circuit board 110.

[0029] In this embodiment, the first capacitor 160 is disposed on the circuit board 110 across the second region 116 and the third region 117 and near the second long side 114. In addition, the first capacitor 160 has a third long axis 160L, which is perpendicular to the second long axis 150L of the transformer 150.

[0030] In this embodiment, the design of the third long axis 160L being perpendicular to the second long axis 150L allows the transformer 150 and the first capacitor 160 to partially overlap in the long side direction of the circuit board 110, thereby increasing the configuration density.

[0031] Of course, in other embodiments, the third major axis 160L of the first capacitor 160 may also be parallel to the second major axis 150L of the transformer 150, and the third major axis 160L may be parallel to the first short side 111. This design allows the transformer 150 and the first capacitor 160 to partially overlap in the direction of the short side of the circuit board 110, thereby increasing the configuration density.

[0032] Furthermore, the second capacitor 170 is disposed in the second region 116 of the circuit board 110, near the first long side 112. The half-bridge resonant capacitor 180 is disposed in the second region 116 of the circuit board 110, further away from the first long side 112 than the second capacitor 170. The half-bridge resonant inductor 190 is disposed in the second region 116 of the circuit board 110, located between the second capacitor 170 and the half-bridge resonant capacitor 180.

[0033] In this embodiment, the half-bridge resonant capacitor 180 and the half-bridge resonant inductor 190 each have a fourth major axis 180L and a fifth major axis 190L, respectively. The fourth major axis 180L of the half-bridge resonant capacitor 180 is parallel to the third major axis 160L of the first capacitor 160. The fifth major axis 190L of the half-bridge resonant inductor 190 is perpendicular to the fourth major axis 180L of the half-bridge resonant capacitor 180 and parallel to the second major axis 150L of the transformer 150.

[0034] Depend on Figure 1 As can be seen, the half-bridge resonant capacitor 180 is disposed between the shield 130 and the transformer 150, and the length of the half-bridge resonant capacitor 180 is only slightly smaller than the distance between the shield 130 and the transformer 150. That is to say, the length of the half-bridge resonant capacitor 180 is quite close to the length of the second region 116 in the long side direction.

[0035] In this embodiment, the design of the fourth major axis 180L of the half-bridge resonant capacitor 180 being parallel to the third major axis 160L of the first capacitor 160 allows the half-bridge resonant capacitor 180 to fully utilize the length of the second region in the long side direction and reduces the space occupied by the half-bridge resonant capacitor 180 in the short side direction of the second region. In this way, the space in the short side direction of the second region can be freed up for the configuration of the longer half-bridge resonant inductor 190.

[0036] In addition, in this embodiment, the circuit board 110 has an input plug 200 located in the first area 115 of the circuit board 110 near the first long side 112 and the first short side 111.

[0037] Figure 2 yes Figure 1 A diagram of the back of the adapter power supply. Please refer to... Figure 2 In this embodiment, the adapter power supply 100 includes several heating elements disposed on the back side 110B of the circuit board 110. These heating elements include at least a bridge rectifier switch 210, a power factor correction transistor 220, and / or a half-bridge resonant transistor 230. Figure 2 As can be seen, the bridge rectifier switch 210 and the power factor correction transistor 220 are located on the back side corresponding to the first region 115, while the half-bridge resonant transistor 230 is located on the back side corresponding to the second region 116.

[0038] Furthermore, heat-generating components, for example, can be made using metal-oxide-semiconductor (MOS) materials, which offer lower manufacturing costs compared to gallium nitride (GaN). Of course, this does not limit the types and materials used for heat-generating components.

[0039] It is worth mentioning that, for example, the dimensions of the adapter power supply 100 in this embodiment are approximately: length 113.5 mm, width 64.5 mm, and thickness 23 mm. The dimensions of a conventional adapter power supply are approximately: length 140.1 mm, width 65.1 mm, and thickness 25.4 mm. Therefore, the adapter power supply 100 in this embodiment reduces its volume by approximately 27.3%. Furthermore, assuming that both the adapter power supply 100 and the conventional adapter power supply have a power of 180W, the power density of the adapter power supply 100 in this embodiment is approximately 1.069 (W / cm²). 3 The power density of existing adapter power supplies is 0.777 (W / cm²). 3 In short, the adapter power supply 100 of this embodiment improves the power density by approximately 37.58% compared to existing adapter power supplies.

[0040] Furthermore, it should be noted that in other embodiments, the detailed dimensions of the adapter power supply 100 in this embodiment may have slight errors, and the power and power density of the adapter power supply 100 mentioned above are only examples. This invention does not limit the detailed dimensions, power, and power density of the adapter power supply 100.

[0041] This invention not only improves the configuration of the adapter power supply but also enhances the transformer. Traditionally, to meet safety regulations regarding insulation distance, insulating tape is applied manually. However, this method is difficult to process, unsuitable for mass production, and cannot be automated. Please continue reading. Figures 3 to 5 , Figure 3 yes Figure 1 A schematic diagram of the transformer in the adapter power supply. Figure 4 yes Figure 3An exploded view of a transformer. Figure 5 yes Figure 3 A cross-sectional view of the transformer. It should be noted that... Figure 3 and Figure 4 Hidden coil, coil only Figure 5 express.

[0042] Please also refer to Figures 3 to 5 Transformer 150 includes a frame 1501 and a coil 1502 ( Figure 5 ), two magnetic cores 1503 ( Figure 4 ) and an insulating cover 1504. (e.g.) Figure 4 As shown, two magnetic cores 1503 pass through a central hole in the wire frame 1501. Figure 3 As shown, magnetic core 1503 ( Figure 4 Together with wire frame 1501 and coil 1502 ( Figure 5 It is covered by insulating cover 1504.

[0043] The wire frame 1501 has a first end 1501A and a second end 1501B. The first end 1501A is provided with a first contact portion 1505, and the second end 1501B is provided with a winding hook portion 1506. The insulating cover 1504 is provided with a second contact portion 1507.

[0044] like Figure 5 As shown, coil 1502 is wound on wire frame 1501, and coil 1502 has an input terminal 1502A and an output terminal 1502B. Input terminal 1502A of coil 1502 is connected to the first pin 1505 of wire frame 1501. Output terminal 1502B of coil 1502 passes around winding hook 1506, over insulating cover 1504, and is then connected to the second pin 1507 of insulating cover 1504.

[0045] The winding hook portion 1506 effectively increases the distance between the output terminal 1502B and the coil 1502 inside the insulating cover 1504. This not only meets safety regulations regarding insulation distance but also reduces the probability of contact between the output terminal 1502B and the coil 1502. Furthermore, the insulating cover 1504 of the transformer 150 keeps the output terminal 1502B outside the insulating cover 1504, further preventing contact between the output terminal 1502B and the coil 1502. On the other hand, the insulating cover 1504 can be equipped with second contact portions 1507 with different parameters according to actual needs, providing a large design margin and flexibility.

[0046] In summary, the adapter power supply 100 of the present invention first designs the position and orientation of four components—electromagnetic interference filter 120, shielding component 130, power factor correction inductor 140, and transformer 150—on the front side 110F of the circuit board 110. Then, smaller electronic components, such as the first capacitor 160, second capacitor 170, half-bridge resonant capacitor 180, and half-bridge resonant inductor 190, are arranged in their positions and orientations. The heat-generating components, including the bridge rectifier switch 210, power factor correction transistor 220, and / or half-bridge resonant transistor 230, are placed on the back side 110B of the circuit board 110. In this way, the adapter power supply 100 can reduce its overall size without affecting power output, improving the space utilization and power density of the circuit board 110, thus achieving the characteristics of a thin and light electronic product and meeting consumer needs.

[0047] Furthermore, the transformer 150 of the adapter power supply 100 of the present invention, through the design of the insulating cover 1504 and the winding hook portion 1506, allows the output terminal 1502B of the coil 1502 to contact the winding hook portion 1506, and then connect to the second pin portion 1507 through the insulating cover 1504. This processing method is not only easier, but also effectively increases the safe distance between the output terminal 1502B connected to the second pin portion 1507 and the coil 1502, while also preventing the output terminal 1502B and the coil 1502 from contacting each other, further improving safety.

[0048] The present invention has been disclosed above with reference to preferred embodiments. However, those skilled in the art should understand that these embodiments are for illustrative purposes only and should not be construed as limiting the scope of the invention. It should be noted that all variations and substitutions equivalent to these embodiments should be considered within the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. An adapter power supply, characterized in that, include: A circuit board has a front side and a back side facing each other, a first long side and a second long side parallel to each other, and the front side of the circuit board is sequentially divided into a first area, a second area and a third area in the extension direction of the first long side, wherein the first area is larger than the third area and the third area is larger than the second area. An electromagnetic interference filter is disposed in the first area of ​​the circuit board and close to the first long side; A shielding element is disposed in the first area of ​​the circuit board and close to the electromagnetic interference filter; A power factor correction inductor is disposed in the first region of the circuit board and close to the second long side, the power factor correction inductor having a first long axis; A transformer, disposed in the third region of the circuit board and near the first long side, the transformer having a second long axis, wherein the first long axis of the power factor correction inductor is perpendicular to the second long axis of the transformer; and Multiple heating elements are disposed on the back side of the circuit board.

2. The adapter power supply as described in claim 1, characterized in that, It also includes a first capacitor, which is disposed on the circuit board across the second region and the third region and close to the second long side.

3. The adapter power supply as described in claim 2, characterized in that, The first capacitor has a third major axis, which is perpendicular to the second major axis of the transformer.

4. The adapter power supply as described in claim 1, characterized in that, It also includes a second capacitor, a half-bridge resonant capacitor, and a half-bridge resonant inductor, disposed in the second area of ​​the circuit board and located between the electromagnetic interference filter and the transformer.

5. The adapter power supply as described in claim 4, characterized in that, The second capacitor is close to the first long side, the half-bridge resonant capacitor is farther away from the first long side than the second capacitor, and the half-bridge resonant inductor is located between the second capacitor and the half-bridge resonant capacitor.

6. The adapter power supply as described in claim 4, characterized in that, The half-bridge resonant capacitor includes a fourth long axis, and the half-bridge resonant inductor includes a fifth long axis, the fourth long axis being perpendicular to the fifth long axis.

7. The adapter power supply as described in claim 6, characterized in that, The fifth major axis is parallel to the second major axis.

8. The adapter power supply as described in claim 1, characterized in that, The heat-generating components include a bridge rectifier switch, a power factor correction transistor, and / or a half-bridge resonant transistor, with the bridge rectifier switch located on the back side corresponding to the first region.

9. The adapter power supply as described in claim 1, characterized in that, It also includes an input plug, wherein the circuit board has a first short side and a second short side that are parallel to each other, the input plug is located in the first area of ​​the circuit board and is close to the first long side and the first short side, and the shield is L-shaped and located between the electromagnetic interference filter and the power factor correction inductor, and also between the electromagnetic interference filter and the transformer.

10. The adapter power supply as claimed in claim 1, characterized in that, The transformer further includes: a wire frame having a first end and a second end, the first end having a first contact portion and the second end having a winding hook portion; a coil wound on the wire frame, the coil having an input end and an output end, the input end being electrically connected to the first contact portion and the output end being in contact with the winding hook portion; a magnetic core being combined with the wire frame and the coil; and an insulating cover being fitted over the outside of the wire frame and the magnetic core, the insulating cover having a second contact portion corresponding to the first contact portion; wherein, after the output end of the coil contacts the winding hook portion, it passes through the insulating cover and then connects to the second contact portion.

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