PCB flatbed magnetic device suitable for normal shock synchronous rectification

A PCB board and synchronous rectification technology, which is applied in the direction of electrical components, output power conversion devices, transformers/inductor coils/windings/connections, etc. Improvement and other issues to achieve the effect of reducing assembly difficulty, improving utilization rate, and meeting large current demand

Active Publication Date: 2013-08-28
江西尚朋电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcomings of using method 1 or method 2 to design these two magnetic devices are very obvious: the design of method 1 faces the problem of too

Method used

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  • PCB flatbed magnetic device suitable for normal shock synchronous rectification
  • PCB flatbed magnetic device suitable for normal shock synchronous rectification
  • PCB flatbed magnetic device suitable for normal shock synchronous rectification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as image 3 , Figure 4 , Figure 5 As shown, in the example of the present invention, the entire magnetic device includes two pairs of EC-type magnetic cores, multiple double-layer PCBs with printed lines (5 pieces are used in this embodiment) as the primary and secondary windings of the transformer, and the inductor windings and 5 magnetics pins (including the transformer and inductor pins).

[0033] Among them, the magnetic core adopts flat EC-type high-frequency ferrite, which has the characteristics of low height and large effective area, especially the center shape of the magnetic core is arc-shaped, which can not only improve the utilization rate of PCB, but also reduce the magnetic flux leakage of the transformer . The double-layer PCB is the primary and secondary windings of the transformer and the winding of the inductor, and the copper foil on the PCB is the winding of the magnetic device. The top and bottom wires of each double-layer PCB represent t...

Embodiment 2

[0041] like Figure 4 , Figure 5 , Figure 6 As shown, in the example of the present invention, the entire magnetic device includes two pairs of EC-type magnetic cores, multiple double-layer PCBs with printed lines (5 pieces are used in this embodiment) as the primary and secondary windings of the transformer, and the inductor windings and 5 magnetics pins (including the transformer and inductor pins).

[0042] Among them, the magnetic core adopts flat EC-type high-frequency ferrite, which has the characteristics of low height and large effective area, especially the center shape of the magnetic core is arc-shaped, which can not only improve the utilization rate of PCB, but also reduce the magnetic flux leakage of the transformer . The double-layer PCB is the primary and secondary windings of the transformer and the winding of the inductor, and the copper foil on the PCB is the winding of the magnetic device. The top and bottom wires of each double-layer PCB represent two...

Embodiment 3

[0051] like Figure 5 , Figure 7 , Figure 8 As shown, in the example of the present invention, the entire magnetic device includes two pairs of EC cores, multiple double-layer PCBs with printed lines (7 pieces are used in this embodiment) as the primary and secondary windings of the transformer and the inductor winding and 5 magnetics pins (including the transformer and inductor pins).

[0052] Among them, the magnetic core adopts flat EC-type high-frequency ferrite, which has the characteristics of low height and large effective area, especially the center shape of the magnetic core is arc-shaped, which can not only improve the utilization rate of PCB, but also reduce the magnetic flux leakage of the transformer . The double-layer PCB is the primary and secondary windings of the transformer and the winding of the inductor, and the copper foil on the PCB is the winding of the magnetic device. The top and bottom wires of each double-layer PCB represent two turns of windin...

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Abstract

The invention relates to magnetic devices, in particular to a PCB flatbed magnetic device suitable for normal shock synchronous rectification. The PCB flatbed magnetic device suitable for the normal shock synchronous rectification comprises a transformer part, and the winding of the transformer part is formed by multiple overlapped double-faced PCBs with metal layers. The PCB flatbed magnetic device suitable for the normal shock synchronous rectification is characterized in that a primary winding and a secondary winding are arranged on different PCBs, and the PCB bearing the primary winding and the PCB bearing the secondary winding are arranged in an interlaced mode. The PCB flatbed magnetic device suitable for the normal shock synchronous rectification further comprises an inductor part, the winding wires of the inductor are also formed by the metal layers of the double-faced PCBs. In the transformer part and the inductor part, the winding wires of an identical PCB are connected through via holes formed in the PCB, and the winding wires of different PCBs are connected through solder casting holes. The inductor part comprises at least two inductors connected in parallel. The secondary output end of the transformer part and the input end of the inductor part share a set of via holes, and the whole magnetic device is provided with only five pins. The PCB flatbed magnetic device suitable for the normal shock synchronous rectification reduces assembling difficulty, and improves the utilization rate of space at the same time.

Description

technical field [0001] The invention relates to a magnetic device, in particular to a PCB flat magnetic device, mainly aimed at a power transformer and a power inductor of a forward converter. Background technique [0002] With the rapid development of semiconductor technology and passive device industry, the packaging volume of electronic components (mainly power devices, capacitors and control chips) in switching converters has decreased sharply, but the isolation of power supplies still uses larger magnetic devices , has become the main factor restricting the power density of switching power supply. [0003] Aiming at the problem that the magnetic components of switching power supply are too large, high-power switching power supply modules usually use flat magnetic components made of PCB. Flat magnetic devices are usually low-height and flat, using small-sized EC-shaped, EI-shaped or annular planar ferrite cores, relying on the existing PCB technology, using PCB copper f...

Claims

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Application Information

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IPC IPC(8): H02M1/00H01F27/28
Inventor 余忠孙科秦俊良蒋晓娜兰中文
Owner 江西尚朋电子科技有限公司
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