CN202167328U

CN202167328U - Kilomega SMT packaging network transformer

Info

Publication number: CN202167328U
Application number: CN2011202187014U
Authority: CN
Inventors: 杨先进; 张小东; 刘朋朋; 蔡文博
Original assignee: DONGGUAN MENTECH ELECTRONIC Co Ltd
Current assignee: Dongguan Mentech Optical and Magnetic Co Ltd
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2012-03-14
Anticipated expiration: 2021-06-24

Abstract

The utility model discloses a kilomega SMT packaging network transformer, comprising a base, an upper cover, a pin, a coil and a circuit board, wherein the pin is inserted on the base; one end of the pin is arranged outside the base and is used as a PIN part; the base is connected with the upper cover by a buckled structure; the lead-out terminal of the coil is connected with the corresponding pin respectively; the coil and the circuit board are arranged in the space formed by the base and the upper cover respectively; and the coil comprises a magnetic core that has high power, withstands high bias current and resists current saturation. The kilomega SMT packaging network transformer has the advantages of small volume and high-power POE.

Description

A kind of gigabit SMT encapsulation network transformer

Technical field

The utility model relates to network transformer, is specifically related to a kind of gigabit SMT encapsulation network transformer.

Background technology

Existing network transformer has single port gigabit networking transformer and twoport gigabit networking transformer.No matter be that single port gigabit networking transformer or twoport gigabit networking transformer can both allow Ethernet on data line, to transmit DC power supply simultaneously.Existing network transformer is applicable to the network switching equipment, notebook computer etc., supports the 10/100/1000Base-T transmission rate, and electrical parameter and performance meet the IEEE802.3at international standard, and electromagnetism inhibition ability meets EN55022 Class B standard-required.But the POE efficient of existing network transformer is low, and the power of the maximum current capacity of design and single channel carrying power receiving equipment power is done to such an extent that be not very high.

The utility model content

The problem that the utility model need solve provides a kind ofly has that volume is little, the gigabit SMT of high power POE encapsulates network transformer.

To achieve these goals; The utility model is designed a kind of gigabit SMT encapsulation network transformer; Comprise base, loam cake, around pin, coil and circuit board, describedly be inserted on the base around wearing, place base exterior as the PIN foot section around an end of pin; Base is connected with the structure of loam cake through mutual button box; The exit of coil is connected around pin respectively with accordingly, and described coil and circuit board are separately positioned in the space of base and loam cake formation, and described coil comprises having the saturated magnetic core of the anti-high bias current anti-current of high power.

The utility model gigabit SMT encapsulation network transformer adopts the covers combined structure design, except possessing general networks transformer function, also realizes high power POE+ function and keeps less product encapsulation.Allow Ethernet on data line, to transmit DC power supply simultaneously.The utility model gigabit SMT encapsulation network transformer is applicable to the network switching equipment, notebook computer etc.; Support the 10/100/1000Base-T transmission rate; Electrical parameter and performance meet the IEEE802.3at international standard, and electromagnetism inhibition ability meets EN55022 Class B standard-required.The utility model gigabit SMT encapsulation network transformer designs maximum current capacity 850mA Max, and single channel carries power receiving equipment (PD) power 30WMax.

Description of drawings:

Fig. 1 is the utility model gigabit SMT encapsulation network transformer perspective view;

Fig. 2 is the front view of the utility model gigabit SMT encapsulation network transformer;

Fig. 3 is the end view of the utility model gigabit SMT encapsulation network transformer;

Fig. 4 is the circuit theory diagrams of the utility model gigabit SMT encapsulation network transformer.

Embodiment

For the ease of those skilled in the art's understanding, will combine specific embodiment and accompanying drawing that the structural principle of the utility model is done further to describe in detail below:

Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4; Design a kind of gigabit SMT encapsulation network transformer; It comprises base 1, loam cake 2, around pin 3, coil 4 and circuit board, describedly intert on base 1 around pin 3, place base 1 outside as the PIN foot section around an end of pin 3; Base 1 is connected with the structure of loam cake 2 through mutual button box; The exit of coil is connected around pin 3 respectively with accordingly, and described coil and circuit board are separately positioned in the space of base and loam cake formation, and described coil comprises having the saturated magnetic core of the anti-high bias current anti-current of high power.

As shown in Figure 4, coil T1, T2, T3, T4, T5, T6, T7, T8 draw terminals 1～40 respectively.

The utility model gigabit SMT encapsulation network transformer has following circuit design characteristics: number transmission, impedance matching, signal noise suppress, high voltage is isolated, high power PoE+Enable.

A, signal transmission: support the 10/100/1000Base-T transmission rate; Electrical parameter and performance meet the IEEE802.3at international standard; Each passage can be defined as different functions (as transmission or receive path) according to different mainboard chips; It is seen PHY off the differential signal that comes and is coupled filtering with enhancing signal with the differential mode coupling coil, and is coupled to an other end of the connection netting twine of varying level through the conversion of electromagnetic field.

B, impedance matching: the impedance of coupling client mainboard 100Ohm, can effectively control ReturnLoss.

C, common-mode signal clutter suppress: increase common mode choke coil in the product magnet assembly; When producing opposite magnetic field during through co-mode coil in magnetic core, the differential mode signal cancels out each other; The magnetic field that in magnetic core, produces equidirectional when common-mode signal during through coil is strengthened; It can make, and useful difference mode signal is almost loss-free to be passed through, and common mode interference signal is presented high impedance, makes its a large amount of decay; Thereby reach the purpose that suppresses common mode EMI, EMI inhibition ability satisfies EN55022 Class B standard.

D, high voltage are isolated: product magnet assembly design insulation voltage satisfies IEEE802.3.2002.PARA 40.6.1.1; ITEM a&b requirement, the varying level of heterogeneous networks equipment room made die terminals and external isolation during the isolation netting twine connected; Antijamming capability strengthens greatly; And chip increased very big protective effect (as thunderbolt), and press through netting twine transmission damage equipment to prevent different electric, can play certain lightning protection and shock resistance protective effect to customer equipment thus.

E, high power PoE+ function (patent protection point): product design adopt through with the anti-high bias current anti-current saturable core of high power of the cooperative development of YST company of well-known magnetic core manufacturer; Make the dimensionally-optimised combination of product electric property and magnetic core; Thereby be controlled at the product encapsulation in the scope of embezzling part of what should be issued; Magnetic core can satisfy OCL 350uH Min under 3%DC Bias (that is: the 25mA bias current) condition of loaded current 850mA, adopts the production technology of improvement.Product meets the IEEE802.3at international standard, possesses PoE+/850mA function of supplying power, and allowing Ethernet while single channel on data line can transmit maximum power is the 30W DC power supply.Can make power receiving equipments (PD) such as voip phone, Wi-Fi Hotspot and security monitoring shooting save extra power supply.

Foregoing is merely the preferred embodiment of the utility model, is not the embodiment that is used to limit the utility model, and those skilled in the art are according to the design of the utility model, and appropriate adaptation of having done or modification all should be within the protection ranges of the utility model.

Claims

1. a gigabit SMT encapsulates network transformer; Comprise base (1), loam cake (2), around pin (3), location pins (4), coil and circuit board; Describedly intert on base (1) around pin (3); End around pin (3) places base (1) outside as the PIN foot section, and base (1) is connected with the structure of loam cake (2) through mutual button box, and the exit of coil is connected around pin (3) respectively with accordingly; Described coil and circuit board are separately positioned in the space of base and loam cake formation, and it is characterized in that: described coil comprises having the saturated magnetic core of the anti-high bias current anti-current of high power.