CN206758271U - A kind of three terminal patch capacitors of server Switching Power Supply - Google Patents

Abstract

The utility model belongs to the technical field of server switching power supply filtering, and in particular relates to a three-terminal chip capacitor for server switching power supply, which includes a capacitor body and four terminals, wherein two terminals are arranged at the front and rear ends of the capacitor body, and are connected to signal electrodes Electrically connected, the other two terminals are electrically connected to the ground electrode, grounded through both sides of the capacitor body, the capacitor body includes the signal electrode and the ground electrode, this solution minimizes the residual ESL by improving the internal structure And ESR, it has a higher and wider filtering effect than traditional capacitors. When laying out, it is directly connected to the signal line in series, and grounded through the ground terminals on both sides, which can better suppress noise in high-frequency circuits and can replace multiple capacitors with the same or similar capacitors. common chip capacitors.

Description

A three-terminal chip capacitor for server switching power supply

technical field

The utility model belongs to the technical field of server switching power supply filtering, in particular to a three-terminal chip capacitor for server switching power supply.

Background technique

The high-frequency noise of server switching power supply has always been a problem that engineers want to overcome, because high-frequency noise can easily affect the surrounding high-speed signals and logic functions of other chips, and easily cause functional confusion at the board level.

Capacitance is composed of a layer of insulating dielectric sandwiched between two metal electrodes. When a voltage is applied between the two metal electrodes, charges will be stored on the electrodes. Capacitors have the function of isolating direct current and passing alternating current in the circuit. They are often used in Inter-stage coupling, filtering, signal tuning, etc. in the circuit can be used to reduce the high-frequency noise of the switching power supply of the server.

Therefore, it is very necessary to provide a three-terminal chip capacitor for a server switching power supply.

Utility model content

The purpose of the utility model is to solve the problem of the influence of the high-frequency noise of the server switching power supply on the surrounding electrical components in the above-mentioned prior art, and provide a three-terminal patch capacitor for the server switching power supply.

In order to achieve the above object, the utility model provides the following technical solutions:

The utility model provides a three-terminal patch capacitor for server switching power supply, which includes a capacitor body and 4 terminals, of which 2 terminals are arranged at the front and rear ends of the capacitor body and are electrically connected to the signal electrodes, and the remaining 2 terminals are connected to the signal electrodes. The ground electrode is electrically connected to ground through both sides of the capacitor body, and the capacitor body includes a signal electrode and a ground electrode. The three-terminal chip capacitor is actually a four-terminal structure. In terms of electrical characteristics, no matter which terminal has the same potential, it is called "three-terminal" after chipping.

Preferably, the capacitor body is composed of several layers of "one"-shaped signal electrodes and several layers of "cross"-shaped ground electrodes alternately stacked, and a ceramic sheet is provided on the top or bottom. The distance between each layer is micron level, which minimizes the residual ESR and ESL value to the ground and reduces the ground loop. For capacitors, the smaller the residual ESL and ESR, the higher the resonance frequency of the capacitor, and the better the attenuation of high frequencies.

Preferably, the capacitor body may also be composed of a glass coating, a "one"-shaped signal electrode, a ceramic body, a "cross"-shaped ground electrode and a glass coating from top to bottom in sequence.

Preferably, the three-terminal chip capacitor is connected in series with the signal line, and grounded through the ground terminal.

Preferably, the three-terminal patch capacitor is mounted on a circuit board, and the conductor wiring on the ground side is configured.

Preferably, the conductor wiring on the ground side is arranged inside the circuit board, and the direction of its noise current is opposite to the direction of the noise current flowing in the capacitor body.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model provides a three-terminal chip capacitor for server switching power supply. The three-terminal capacitor itself has the characteristics of low ESL and low ESR. This solution minimizes the residual ESL and ESR by improving the internal structure. , It has a higher and wider filtering effect than traditional capacitors. It is directly connected in series with the signal line in the layout, and grounded through the ground terminals on both sides, which can better suppress noise in high-frequency circuits and can replace multiple identical or similar ordinary capacitors. Chip capacitors.

In addition, the method of the utility model is reliable in principle, simple in steps, and has very wide application prospects.

It can be seen that, compared with the prior art, the utility model has substantive features and progress, and the beneficial effects of its implementation are also obvious.

Description of drawings

Fig. 1 is a schematic structural diagram of a three-terminal chip capacitor for a server switching power supply provided by the utility model.

Fig. 2 is an exploded view 1 of the internal structure of a three-terminal chip capacitor for a server switching power supply provided by the utility model.

Fig. 3 is an exploded view 2 of the internal structure of a three-terminal chip capacitor for a server switching power supply provided by the utility model.

Fig. 4 is an equivalent circuit diagram of a three-terminal chip capacitor for a server switching power supply provided by the utility model.

Fig. 5 is an equivalent circuit diagram of a circuit board of a three-terminal chip capacitor for a server switching power supply provided by the utility model.

Among them, 1-capacitor body, 2-terminal, 3-signal electrode, 4-ground electrode, 5-ceramic sheet, 6-glass coating, 7-ceramic body.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following examples are explanations of the utility model, but the utility model is not limited to the following embodiments.

Example 1

As shown in Figures 1, 2, 4, and 5, the utility model provides a three-terminal chip capacitor for server switching power supply, including a capacitor body 1 and four terminals 2, of which two terminals 2 are arranged on the capacitor body 1 The front and rear ends of the terminal are electrically connected to the signal electrode 3, and the other two terminals 2 are electrically connected to the ground electrode 4, and are grounded through both sides of the capacitor body 1. The capacitor body 1 includes the signal electrode 3 and the ground electrode 4.

In this embodiment, the capacitor body 1 has a 9-layer electrode structure, which is composed of 5 layers of "cross"-shaped ground electrodes 4 and 4 layers of "one"-shaped signal electrodes 3 alternately stacked, and a ceramic sheet 5 is arranged on the top. In this embodiment, the distance between the electrodes of each layer is in the order of microns, which minimizes the residual ESR and ESL values to the ground and reduces the ground loop. For capacitors, the smaller the residual ESL and ESR, the higher the resonance frequency of the capacitor, and the better the attenuation of high frequencies.

In this embodiment, the three-terminal chip capacitor is connected in series with the signal line, and grounded through the ground terminal.

In this embodiment, the three-terminal chip capacitor is installed on the circuit board, and the conductor wiring on the ground side is configured.

In this embodiment, the conductor wiring on the ground side is arranged inside the circuit board, and the direction of the noise current is opposite to the direction of the noise current flowing in the capacitor body.

Example 2

As shown in Figures 1 and 3, the utility model provides a three-terminal chip capacitor for server switching power supply, including a capacitor body 1 and four terminals 4, wherein two terminals 4 are arranged at the front and rear ends of the capacitor body 1 , is electrically connected to the signal electrode 3, and the other two terminals 2 are electrically connected to the ground electrode 4, and grounded through both sides of the capacitor body 1, and the capacitor body 1 includes the signal electrode 3 and the ground electrode 4.

In this embodiment, the capacitor body 1 includes a glass coating 6 , a “one”-shaped signal electrode 3 , a ceramic body 7 , a “cross”-shaped ground electrode 4 and a glass coating 6 from top to bottom.

This structure can reduce the residual ESR and ESL value to the ground, thereby reducing the ground loop. For capacitors, the smaller the residual ESL and ESR, the higher the resonance frequency of the capacitor, and the better the attenuation of high frequencies.

In this embodiment, the product size of the three-terminal chip capacitor is 2.0*1.25*0.8 (mm), and the rated current is 6A. In other embodiments of the present utility model, the size deviation of the three-terminal chip capacitor No more than 0.2mm, rated current is 1A to 6A.

The utility model provides a three-terminal chip capacitor for server switching power supply. The three-terminal capacitor itself has the characteristics of low ESL and low ESR. This solution minimizes the residual ESL and ESR by improving the internal structure. , It has a higher and wider filtering effect than traditional capacitors. When laying out, it is directly connected in series with the signal line, and grounded through the ground terminals on both sides, which can better suppress noise in high-frequency circuits and can replace multiple identical or similar ordinary capacitors. Chip capacitors.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be Included within the protection scope of the present utility model.

Claims (6)

1. A kind of 1. three terminal patch capacitors of server Switching Power Supply, it is characterised in that：Including electric capacity body and four terminals, Wherein 2 terminals are arranged on the rear and front end of electric capacity body, are electrically connected with signal electrode, remaining 2 terminal and grounding electrode electricity Connection, it is grounded by the both sides of electric capacity body, includes signal electrode and grounding electrode in the electric capacity body.
2. A kind of 2. three terminal patch capacitors of server Switching Power Supply as claimed in claim 1, it is characterised in that：The electricity If hold body by dried layer " one " if glyph signal electrode and dried layer " ten " font grounding electrode alternately superposition is formed, and at top or Bottom is provided with potsherd.
3. A kind of 3. three terminal patch capacitors of server Switching Power Supply as claimed in claim 1, it is characterised in that：The electricity Hold body by top-to-bottom successively include glass coating, " one " glyph signal electrode, ceramic body, " ten " font grounding electrode and Glass coating.
4. 4. a kind of three terminal patch capacitors of server Switching Power Supply as described in any one of claims 1 to 3, its feature exist In：Three described terminal patch capacitors are connected with signal wire, pass through ground terminal ground.
5. A kind of 5. three terminal patch capacitors of server Switching Power Supply as claimed in claim 4, it is characterised in that：Described Three terminal patch capacitors are installed on circuit boards, and configure ground side conductor wiring.
6. A kind of 6. three terminal patch capacitors of server Switching Power Supply as claimed in claim 5, it is characterised in that：It is described to connect Ground side conductor wiring is arranged on the inside of circuit board, the noise current flowed through in the direction of its noise current and electric capacity body In the opposite direction.