CN203984777U - A kind of printed circuit board - Google Patents
A kind of printed circuit board Download PDFInfo
- Publication number
- CN203984777U CN203984777U CN201420385347.8U CN201420385347U CN203984777U CN 203984777 U CN203984777 U CN 203984777U CN 201420385347 U CN201420385347 U CN 201420385347U CN 203984777 U CN203984777 U CN 203984777U
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- CN
- China
- Prior art keywords
- circuit board
- printed circuit
- capacitance device
- inductance component
- resistance ware
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of printed circuit board, described printed circuit board is provided with power module, the surrounding of described power module is placed with capacitance resistance ware, and the arrangement mode of the capacitance resistance ware in described printed circuit board is to determine according to the minimum reflux path of every switching circuit in described printed circuit board; Wherein, described every switching circuit at least comprises: inductance component, output capacitance device, input capacitance device, in described minimum reflux path, the distributing order of described inductance component and capacitor element is followed successively by: inductance component, output capacitance device, input capacitance device.By the utility model, can reduce the shared printed circuit board area of circuit devcie, the layout dimension of dwindling circuit devcie on printed circuit board.
Description
Technical field
The utility model relates to the manufacture technology field of printed circuit board (PCB, Printed Circuit Board), relates in particular to a kind of printed circuit board.
Background technology
In prior art, the power module on pcb board and the layout of circuit devcie are carried out according to the device placement rule of high pass principle mostly, and this layout type is unfavorable for saving the area of pcb board, cannot adapt to the too high application scenarios of pcb board area requirements.
Utility model content
For solving the technical problem of existing existence, the utility model provides a kind of printed circuit board.
A kind of printed circuit board that the utility model provides, described printed circuit board is provided with power module, the surrounding of described power module is placed with capacitance resistance ware, and the arrangement mode of the capacitance resistance ware in described printed circuit board is to determine according to the minimum reflux path of every switching circuit in described printed circuit board;
Wherein, described every switching circuit at least comprises: inductance component, output capacitance device, input capacitance device, in described minimum reflux path, the distributing order of described inductance component and capacitor element is followed successively by: inductance component, output capacitance device, input capacitance device.
Wherein, input power voltage pulse output after internal switch circuit path of introducing from described power module, described pulse voltage is sent into the hot end of described inductance component, the cold end of described inductance component connects the hot end of described output capacitance device, the cold end ground connection of described output capacitance device; The high potential termination power input of described input capacitance device, the cold end ground connection of described input capacitance device.
Wherein, the first's capacitance resistance ware in described printed circuit board is embedded in described printed circuit board, and second portion capacitance resistance ware is arranged in described printed circuit board surface.
Wherein, described first capacitance resistance ware is embedded between the 4th laminate and layer 5 plate of described printed circuit board.
A kind of printed circuit board provided by the utility model, can reduce the shared printed circuit board area of circuit devcie, the layout dimension of dwindling circuit devcie on printed circuit board.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of printed circuit board of the utility model embodiment;
Fig. 2 is the schematic diagram in a kind of minimum reflux path of the utility model embodiment;
Fig. 3 is for placing the schematic diagram of regular a kind of printed circuit board of arranging according to the device of high pass principle.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is further elaborated.
A kind of printed circuit board that the utility model embodiment provides, as shown in Figure 1, on described printed circuit board 10, be provided with power module 101 (as shown in the shade square in Fig. 1), the surrounding of described power module 101 is placed with capacitance resistance ware 102 (as shown in power module in Fig. 1 101 blank square around), and the arrangement mode of the capacitance resistance ware 102 in described printed circuit board 10 is to determine according to the minimum reflux path of every switching circuit in described printed circuit board 10; Wherein, described every switching circuit at least comprises: inductance component, output capacitance device, input capacitance device, on current direction in described minimum reflux path, the distributing order of described inductance component and capacitor element is followed successively by: inductance component, output capacitance device, input capacitance device.
Concrete, input power voltage pulse output after internal switch circuit path of introducing from described power module 101, described pulse voltage is sent into the hot end of described inductance component, the cold end of described inductance component connects the hot end of described output capacitance device, the cold end ground connection of described output capacitance device; The high potential termination power input of described input capacitance device, the cold end ground connection of described input capacitance device.
Take the AC power loop of the Switching Power Supply shown in Fig. 2 is below example, elaborates the arrangement mode of determining capacitance resistance ware according to the minimum reflux path of every switching circuit.During capacitance resistance ware in circuit shown in layout viewing 2, require to shorten return flow path, to reduce electromagnetic radiation and the interference to other signals as far as possible.Based on mentioned above principle, by analyzing every switching circuit, in the AC power loop of Switching Power Supply, the arrangement mode of each device is as follows:
The input power of introducing from main power source module VPH_PWR is to VDD_S1 and after internal switch circuit path, and the pulse voltage of output is VSW_S1; VSW_S1 is admitted to power inductance 201, the high potential termination VSW_S1 of described power inductance 201, the hot end of the electronegative potential termination output capacitor part 202 of described power inductance, the cold end ground connection of described output capacitance device 202; The high potential termination power input of described input capacitance device 203, be VDD_S1, the cold end of described input capacitance device 203 connects the cold end of described output capacitance device 202, and also ground connection of the cold end of described input capacitance device 203.
From the minimum reflux path shown in Fig. 2 and the direction of arrow, can find out, the minimum reflux path shown in Fig. 2 in circuit is: VDD_S1 → internal switch circuit path → VSW_S1 → power inductance 201 → output capacitance device 202 → input capacitance device 203 → VDD_S1.
According to the minimum reflux path of every switching circuit, determine the arrangement mode of capacitance resistance ware, not only can shorten return flow path so as far as possible, reduce electromagnetic radiation and the interference to other signals, the more important thing is, can dwindle the layout dimension of circuit devcie on printed circuit board, reduce the shared printed circuit board area of circuit devcie.
In addition, in another execution mode of the present utility model, in the utility model embodiment, a part (first) capacitance resistance ware can be embedded in described printed circuit board, another part (second portion) capacitance resistance ware is arranged in described printed circuit board surface.Preferably, described first capacitance resistance ware is embedded between the 4th laminate and layer 5 plate of described printed circuit board.By described embedding processing, can further dwindle the layout dimension of circuit devcie on printed circuit board, reduce the shared printed circuit board area of circuit devcie.It should be noted that, this part is embedded in the arrangement mode of the capacitance resistance ware in printed circuit board and also need determines according to the minimum reflux path of every switching circuit.
That is to say, the utility model embodiment determines the arrangement mode of capacitance resistance ware according to the minimum reflux path of every switching circuit in printed circuit board, and a part of capacitance resistance ware is embedded in printed circuit board, can better reach the layout dimension of dwindling circuit devcie on printed circuit board like this, reduce the effect of the shared printed circuit board area of circuit devcie.Facts have proved, adopt the printed circuit board of the method making of the utility model embodiment to compare the printed circuit board of placing rule making according to the device of traditional high pass principle, in the layout dimension of circuit devcie, can access greatly and dwindle, thereby can better save printed circuit board area.
Illustrate below, with the printed circuit board of the power module based on high pass chip PM8921, arrange as example, as shown in Figure 3, the surrounding of chip PM8921 is distributed with 90 materials and parts, Fig. 3 places according to the device of high pass principle the printed circuit board of arranging that rule is carried out materials and parts, in figure, 10 represent printed circuit board, and 101 represent power module (being chip PM8921), and 102 represent to be arranged in chip PM8921 materials and parts around.According to the device of high pass principle, place the printed circuit board that rule is arranged, its length is 22.1 meters, and wide is 20.19 meters, and area occupied is 22.1 * 20.19=446.2 square metre.
And adopt the arrangement mode of determining capacitance resistance ware according to the minimum reflux path of every switching circuit of the present utility model, and a part of capacitance resistance ware is embedded in printed circuit board, can dwindle the layout dimension of circuit devcie on printed circuit board, reduce the shared printed circuit board area of circuit devcie.If 28 filter capacitors in 90 materials and parts are embedded in printed circuit board, place nearby depending on the device pin on printed circuit board surface embedding position, and according to the minimum reflux path of every switching circuit, determine the arrangement mode of capacitance resistance ware, so as shown in Figure 1, the length of the printed circuit board of arranging can be controlled at 16.5 meters, widely can be controlled at 14.9 meters, area occupied can be controlled at 16.5 * 14.9=245.85 square metre.Place the regular printed circuit board of arranging that carries out materials and parts with the device according to high pass principle and compare, can save 44.9% printed circuit board area.
The above; it is only embodiment of the present utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (4)
1. a printed circuit board, described printed circuit board is provided with power module, the surrounding of described power module is placed with capacitance resistance ware, it is characterized in that, the arrangement mode of the capacitance resistance ware in described printed circuit board is to determine according to the minimum reflux path of every switching circuit in described printed circuit board;
Wherein, described every switching circuit at least comprises: inductance component, output capacitance device, input capacitance device, in described minimum reflux path, the distributing order of described inductance component and capacitor element is followed successively by: inductance component, output capacitance device, input capacitance device.
2. printed circuit board according to claim 1, it is characterized in that, input power voltage pulse output after internal switch circuit path of introducing from described power module, described pulse voltage is sent into the hot end of described inductance component, the cold end of described inductance component connects the hot end of described output capacitance device, the cold end ground connection of described output capacitance device; The high potential termination power input of described input capacitance device, the cold end ground connection of described input capacitance device.
3. according to printed circuit board described in claim 1 or 2, it is characterized in that, the first's capacitance resistance ware in described printed circuit board is embedded in described printed circuit board, and second portion capacitance resistance ware is arranged in described printed circuit board surface.
4. printed circuit board according to claim 3, is characterized in that, described first capacitance resistance ware is embedded between the 4th laminate and layer 5 plate of described printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385347.8U CN203984777U (en) | 2014-07-14 | 2014-07-14 | A kind of printed circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420385347.8U CN203984777U (en) | 2014-07-14 | 2014-07-14 | A kind of printed circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203984777U true CN203984777U (en) | 2014-12-03 |
Family
ID=51982192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420385347.8U Expired - Fee Related CN203984777U (en) | 2014-07-14 | 2014-07-14 | A kind of printed circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203984777U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109496057A (en) * | 2018-11-12 | 2019-03-19 | 晶晨半导体(上海)股份有限公司 | A kind of printed circuit board layout |
-
2014
- 2014-07-14 CN CN201420385347.8U patent/CN203984777U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109496057A (en) * | 2018-11-12 | 2019-03-19 | 晶晨半导体(上海)股份有限公司 | A kind of printed circuit board layout |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20200714 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |