Abstract:
The present disclosure provides an assembly structure for providing power for a chip and an electronic device using the same. The assembly structure includes: a circuit board, configured to provide a first electrical energy; a chip; and a first power converting module, configured to electrically connect the circuit board and the chip, convert the first electrical energy to a second electrical energy, and supply the second electrical energy to the chip, wherein the circuit board, the chip and the first power converting module are stacked to form the assembly structure. The present disclosure assembles a power converting module with a circuit board and a chip in a stacking manner, which may shorten a current path between the power converting module and the chip, reduce current transmission losses, improve efficiency of a system, reduce space occupancy and save system resource.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application is based upon and claims priority to Chinese Patent Application No. 201510362342.2, filed Jun. 26, 2015, the entire contents of which are incorporated herein by reference. 
       TECHNICAL FIELD 
       [0002]    The present disclosure relates to an assembly structure and an electronic device, and more particularly, to an assembly structure for providing power for a chip and an electronic device having the assembly structure. 
       BACKGROUND 
       [0003]    With growth of demand for intelligent life of people, demand for data processing is also growing. Throughout the world, power consumption spent on data processing has reached hundreds of billions of or even trillions of kilowatts-hours each year on average, and a large data center may occupy an area up to tens of thousands of square meters. Accordingly, high efficiency and high power density are key pointers of healthy development of a data center. 
         [0004]    Key units of a data center are servers, each of which is typically equipped with a main board composed of data processing chips (such as a CPU, chipsets, a memory or the like), their power supply modules and necessary peripheral components. With increase of processing capacity per volume unit of a server, the amount and integration level of the processing chips are also increasing, resulting in increase of space occupancy and power consumption. Accordingly, the power supply module (also referred to as a main board power supply module since it is provided on the same main board with the data processing chips) for the chips is expected to have higher efficiency, higher power density and smaller volume than before, to realize energy saving and reduction of area occupancy for the entire server or even for the entire data center. Along with increase of computing speeds of chips, power consumption of the chips increases. Although supply voltages of the chips trend to be reduced, supply currents are still increased greatly due to increase of amount of transistors, which causes that losses on a current path from the power source modules to the chips increase greatly and whole efficiency of systems are reduced. 
         [0005]      FIG. 1A  is a schematic diagram of a chip installing mode and a power supply mode in prior art. A main board  11  of a server is provided with a processor chip  12  (for example, a central processing unit (CPU), a graphics processor unit (GPU), and a data communication switch chip or other large scale integrated circuit chips and the like, here the processor chip in  FIG. 1A  takes the CPU as an example) and a power supply module  13  (for example, a DC (direct current)/DC module). In addition, the processor chip  12  is provided thereon with a heat sink  14  for dissipating heat it produces. Since the processor chip  12  is usually a very sophisticated device, which has a plurality of pins, even up to 2000 or more, to ensure reliable connections between all pins and the system, an additional member (for example, a socket  15 , a CPU clip  16 , a support plate  17 , a back plate  18  and a screw  19  and the like in  FIG. 1A ) is usually needed to fix the processor chip  12  to the main board  11 . In addition, a capacitor  111  is further provided between the processor chip  12  and the power supply module  13  on the main board  11 . Such structural members occupy much space around the chip  12 , so that the power supply module  13  cannot be close to the processor chip  12 , which results in a long current path and more losses. In some applications, the losses may even reach 2% of total power consumption of the chip. 
         [0006]      FIG. 1B  is another schematic diagram of a chip installing mode and a power supply mode in the prior art. Body heights of some processor chips  12  with high energy consumption are very low and relatively large heat sinks  14  are provided. Heights of the power supply modules are hard to be lower than the body heights of the chips. Limited by sizes of the heat sinks, the power supply modules cannot be placed in positions close to the chips, which results in long current paths and more losses. 
       SUMMARY OF THE DISCLOSURE 
       [0007]    One aspect of the present disclosure provides an assembly structure, including: 
         [0008]    a circuit board, configured to provide a first electrical energy; 
         [0009]    a chip; and 
         [0010]    a first power converting module, configured to electrically connect the circuit board and the chip, convert the first electrical energy to a second electrical energy, and supply the second electrical energy to the chip, 
         [0011]    wherein the circuit board, the chip and the first power converting module are stacked to form the assembly structure. 
         [0012]    One aspect of the present disclosure provides an assembly structure, including: 
         [0013]    a circuit board, configured to provide a first DC voltage; 
         [0014]    a CPU; and 
         [0015]    a DC/DC converter, configured to electrically connect the circuit board and the CPU, convert the first DC voltage to a second DC voltage, and supply the second DC voltage to the CPU, 
         [0016]    wherein the circuit board, the CPU and the DC/DC converter form the assembly structure in a stacking sequence, and the stacking sequence is: the CPU on the DC/DC converter, then the DC/DC converter on the circuit board in sequence; or the stacking sequence is: the CPU on the circuit board, then the circuit board on the DC/DC converter in sequence; or the stacking sequence is the CPU on the circuit board in sequence and the DC/DC converter is at least partly buried in the circuit board. 
         [0017]    One aspect of the present disclosure provides an electronic device, including the assembly structure described above.
       The present disclosure assembles a power converting module with a circuit board and a chip in a stacking manner, which may shorten a current path between the power converting module and the chip.       
 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0019]      FIGS. 1A and 1B  are schematic diagrams of an assembly structure for providing power for a chip in the prior art; 
           [0020]      FIG. 2  is a schematic diagram of an assembly structure for providing power for a chip in which a power converting module and a chip are located in the same side of a circuit board, according to an embodiment of the present disclosure; 
           [0021]      FIG. 2A  is a schematic diagram of an assembly structure for providing power for a chip in which a power converting module is partly buried in a socket and directly contacts a circuit board, according to an embodiment of the present disclosure; 
           [0022]      FIGS. 2B-2C  are schematic diagrams of an assembly structure for providing power for the chip of  FIG. 2A  in which the power converting module and the circuit board are connected through pins; 
           [0023]      FIGS. 2D-2E  are schematic diagrams of an assembly structure for providing power for a chip in which a power converting module is partly buried in a socket and directly contacts a chip, according to an embodiment of the present disclosure; 
           [0024]      FIGS. 2F-2G  are schematic diagrams of an assembly structure for providing power for a chip in which a power converting module is entirely buried in a socket, according to a further embodiment of the present disclosure; 
           [0025]      FIGS. 3A-3C  are schematic diagrams of a distribution of pins between a power converting module and a chip in an assembly structure, according to an embodiment of the present disclosure; 
           [0026]      FIGS. 4A-4B  are schematic diagrams of heat dissipation of the assembly structure for providing power for the chip of embodiments as shown in  FIGS. 2A-2E ; 
           [0027]      FIG. 5  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure which includes an electromagenetic shielding layer; 
           [0028]      FIG. 6  is a schematic diagram of an assembly structure for providing power for a chip in which a power converting module and a chip are located in different sides of a circuit board, according to an embodiment of the present disclosure; 
           [0029]      FIG. 6A  is a schematic diagram of an assembly structure for providing power for a chip in which a power converting module is partly buried in a back plate and directly contacts a circuit board, according to an embodiment of the present disclosure; 
           [0030]      FIGS. 6B-6C  are schematic diagrams of an assembly structure for providing power for a chip of  FIG. 6A  in which a power converting module and a circuit board are connected through a pin; 
           [0031]      FIGS. 6D-6G  are schematic diagrams of an assembly structure for providing power for a chip in which a power converting module is partly buried in a back plate and contacts a circuit board through a connector, according to an embodiment of the present disclosure; 
           [0032]      FIGS. 6H-6I  are schematic diagrams of an assembly structure for providing power for a chip in which a power converting module is entirely buried in a back plate, according to a further embodiment of the present disclosure; 
           [0033]      FIGS. 7A-7C  are schematic diagrams of a distribution of pins between a power converting module and a circuit board in an assembly structure, according to an embodiment of the present disclosure; 
           [0034]      FIGS. 8A-8E  are schematic diagrams of heat dissipation of an assembly structure for providing power for a chip of an embodiment of the present disclosure; 
           [0035]      FIG. 9  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure which includes an electromagenetic shielding layer; 
           [0036]      FIG. 10  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure in which a power converting module penetrates through a circuit board; 
           [0037]      FIG. 10A  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure in which a power converting module penetrates through a circuit board and is partly buried in a socket; 
           [0038]      FIGS. 10B  is a schematic diagram of an assembly structure for providing power for a chip in which a power converting module and a circuit board are separately provided; 
           [0039]      FIG. 10C  is a schematic diagram of an assembly structure for providing power for a chip in which a power converting module and a circuit board are integrated into an entirety; 
           [0040]      FIG. 11  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure in which a power converting module includes two power converting modules; 
           [0041]      FIG. 11A  is a schematic diagram of an assembly structure for providing power for a chip of another embodiment of the present disclosure in which a power converting module includes a control module and a converting module separately provided; 
           [0042]      FIG. 11B  is a schematic diagram of an assembly structure for providing power for a chip of another embodiment of the present disclosure which includes two power converting modules; and 
           [0043]      FIGS. 12A-12G  are schematic diagrams of functions and mutual connection relationships between power converting modules. 
       
    
    
     DETAILED DESCRIPTION 
       [0044]      FIG. 2  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure. The assembly structure  2  for providing power for a chip includes a circuit board  21 , which provides a first electrical energy; a chip  22 , which may be a CPU, a GPU or a memory and the like; and a power converting module  23 , which is electrically connected to the circuit board  21  and the chip  22 , converts the first electrical energy to a second electrical energy, and supplies the second electrical energy to the chip  22 . Wherein the power converting module  23  may be located between the chip  22  and the circuit board  21  and they are mutually stacked to form the assembly structure  2 . However, the present disclosure is not limited to this. An upper surface of the power converting module  23  and a lower surface of the chip  22  may be contacted and electrically connected. A lower surface of the power converting module  23  and an upper surface of the circuit board  21  may be contacted and electrically connected. A connecting mode between the power converting module  23  and the chip  22  may be welding or pressing, etc. In the present embodiment, the power converting module  23  is disposed below the chip  22  and the power converting module  23  directly contacts and electrically connects the chip  22 , which shortens the current path between the power source conversion module  23  and the chip  22 , reduces current transmission losses, lowers area occupancy of components on the circuit board  21 , and saves space of the whole system. 
         [0045]      FIG. 2A  is a schematic diagram of an assembly structure for providing power for a chip of another embodiment of the present disclosure. Main differences between the assembly structure  2  for providing power for a chip in the present embodiment and that of the above embodiment lie in that, it further includes a socket  25 . The chip  22  is electrically connected to the socket  25 , the power converting module  23  may be partly buried in the socket  25 , a lower surface of the power converting module  23  may be exposed from the socket  25 , and the lower surface of the power converting module  23  may contact an upper surface of the circuit board  21 . The power converting module  23  may be electrically connected to the socket  25 . In one embodiment, the power converting module  23  may provide the second electrical energy for the chip  22  at least partly through the socket  25 . The power converting module  23  and the socket  25  may be two separate components to be assembled together, or may be integrated into an undetachable component through molding technology or embedding technology used in packaging. The present disclosure is not limited to this. 
         [0046]    The power converting module  23  includes an input and an output. The input of the power converting module  23  may include power input or a signal input of the power converting module  23 , or include both. As shown in  FIG. 2B , input pins  231  provided on the lower surface of the power converting module  23  electrically connect the circuit board  21 . The power input and/or signal input may be directly transmitted to the power converting module  23  from the circuit board  21 , as shown by arrows in  FIG. 2B . As shown in  FIG. 2C , output pins  232  provided on the lower surface of the power converting module  23  electrically connect the circuit board  21 , and they may further connect the chip  22  through the circuit board  21  and the socket  25 . A power output and/or signal output may be transmitted from the power converting module  23  to the chip  22  through the circuit board  21  and the socket  25  in sequence. However, the present disclosure is not limited to this. For example, the power output and/or signal output may be transmitted from the power converting module  23  to the chip  22  through the socket  25 , or may be directly transmitted to the chip  22 , and so on. A connecting mode between the pins  231  and  232  and the circuit board  21  may be welding or pressing, etc. The present disclosure is not limited to this. 
         [0047]      FIG. 2D  is a schematic diagram of an assembly structure for providing power for a chip of another embodiment of the present disclosure. It mainly differs from the embodiments as shown in  FIGS. 2A-2C  in that, the power converting module  23  is partly buried in the socket  25 , an upper surface of the power converting module  23  is exposed from the socket  25 , and the upper surface of the power converting module  23  contacts a lower surface of the chip  22 . The power converting module  23  may directly provide the second electrical energy for the chip  22 . Because the upper surface of the power converting module  23  may directly contact the lower surface of the chip  22 , an input and an output of the power converting module  23  may be directly connected with the chip  22 . Combining with  FIG. 2E , power and/or signals may be transmitted between the chip  22  and the power converting module  23 , wherein a transmission direction of the power and/or signals may be as shown by the arrows in  FIG. 2E . Set positions of the pins electrically connecting the power converting module  23  and the chip  22 , connecting mode between the pins and the chip, and structure of the pins may be the same as illustrated in the embodiments as shown in  FIGS. 2A-2C , which will not be repeated here, but the present disclosure is not limited to this. 
         [0048]      FIG. 2F  is a schematic diagram of an assembly structure for providing power for a chip of a further embodiment of the present disclosure. It mainly differs from the embodiments as shown in  FIGS. 2A-2E  where the power converting module  23  is partly buried in the socket  25  in that, in the present embodiment, the power converting module  23  is entirely buried in the socket  25 . The power converting module  23  is electrically connected to the socket  25 . The power converting module  23  provides the second electrical energy for the chip  22  through the socket  25 . An input of the power converting module  23  may connect the circuit board  22  through the socket  25 . Input power and/or signals are transmitted from the circuit board  21  to the socket  25 , and then transmitted to the power converting module  23  through the socket  25 . Connections of the input power and/or signals between the power converting module  23  and the socket  25  may be on a side surface, an upper surface or a lower surface of the power converting module  23 , or may be on a plurality of surfaces, which is shown by the arrows in  FIG. 2F . However, the present disclosure is not limited to this. As shown in  FIG. 2G , an output of the power converting module  23  may connect the chip  22  through the socket  25 . Output power and/or signals are transmitted from the power converting module  23  to the socket  25 , and then transmitted to the chip  22  through the socket  25 . Connections of the power output and/or signal output between the power converting module  23  and the socket  25  may be on a side surface, an upper surface or a lower surface of the power converting module  23 , or may be on a plurality of surfaces, which is shown by the arrows in  FIG. 2G  However, the present disclosure is not limited to this. The power converting module  23  and the socket  25  may be integrated into an undetachable entirety, or the power converting module  23  and the socket  25  may be detachable components. When the power converting module  23  and the socket  25  are integrated into an entirety, the connections between the power converting module  23  and the socket  25  may be realized via conductors inside. While when the power converting module  23  and the socket  25  are detachable components, a connecting mode between the power converting module  23  and the socket  25  may adopt ways such as welding or pressing. 
         [0049]    An arrangement of output pins of the power converting module  23  may be determined according to corresponding pin positions of the chip  22 , the socket  25  or the circuit board  21 , to realize a shorter power and/or signal transmitting distance.  FIGS. 3A and 3B  are schematic diagrams of pin arrangements when the power converting module  23  directly connects the chip  22 , wherein  FIG. 3A  is a side view and  FIG. 3B  is a plan view. Power input pins  231  (or electrical energy input terminals) of the chip  22  are denoted by dashed circles, which may be distributed in different regions of surfaces of the chip  22 . Power received by respective regions may be different, which is denoted by current values in  FIG. 3B . Power output pins  232  (denoted by dashed boxes in  FIG. 3B ) of the power converting module  23  may be arranged according to positions of the power input pins of the chips, distributed on surfaces of the power converting module  23 . For example, projections of the power output pins  232  of the power converting module  23  and projections of the power input pins of the chip  22  in a direction perpendicular to the circuit board, may be overlapped. The present disclosure is not limited to this. The chip  22  and the power converting module  23  may use pins with different shapes, sizes, and/or materials according to power demand of regions where the pins are located, to realize the aim of reducing power transmission losses. Respective regions of surfaces of the power converting module  23  may have one or more pins. A surface for electrical connection may be referred to as an electrical connecting surface. For example, the upper surface of the power converting module  23  may be referred to as a first electrical connecting surface, the lower surface of the chip  22  may be referred to as a second electrical connecting surface. However, the present disclosure is not limited to this. In one embodiment, the chip has at least one electrical energy input terminal, which may be provided on the lower surface or other positions of the chip. The power output terminals of the power converting module  23  may be provided on the upper surface or other positions of the power converting module  23 . Projection of the electrical energy input terminal of the chip and projection of the power output terminal of the power converting module in a direction perpendicular to the circuit board, may be overlapped, to further reduce current path length. However, the present disclosure is not limited to this. 
         [0050]    Combining with  FIGS. 4A and 4B , input pins  231  and output pins  232  of the power converting module  23  may be located on the same surface (for example, a top surface or a bottom surface) or different surfaces of the power converting module  23 . Alternatively, the input pins  231  and output pins  232  of the power converting module  23  may be partly located on the same surface or partly located on different surfaces of the power converting module  23 . The present disclosure is not limited to this. The input pins  231  and output pins  232  of the power converting module  23  may adopt the same connecting mode or different connecting modes to connect the circuit board  21  and the chip  22 . For example, in  FIG. 3C , a part of power input pins  2311  (for example, input positive Vin+, input negative Vin−, auxiliary power supply and the like), a part of signal input pins  2312  (for example, input voltage sampling, input current sampling and the like), and a part of signal output pins  2322  (for example, an overcurrent warning signal, a module overheat warning signal and the like) of the power converting module  23  may be located on the bottom surface of the power converting module  23  and connected with the circuit board  21 . A part of power output pins  2321  (for example, output positive Vo+, output negative Vo− and the like), a part of signal output pins  2322  (for example, an input current monitoring signal, an output current monitoring signal and the like), and a part of signal input pins  2312  (for example, a terminal voltage sampling signal of the chip and the like) may be located on the top surface of the power converting module  23  and connected with the chip  22 . A part of power input pins  2311  (for example, the input positive Vin+, the input negative Vin+, the auxiliary power supply and the like), a part of power output pins  2321  (for example, the output positive Vo+, the output negative Vo− and the like), a part of signal input pins  2312  (for example, a digital communication input and the like) and a part of signal output pins  2322  (for example, a digital communication output and the like) may be alternatively located on a side surface of the power converting module  23  and connected with the socket  25 . 
         [0051]    In the above embodiments, the chip  22  is equipped with a heat sink  24 , but the present disclosure is not limited to this. For example, the heat sink may not only contact the chip, but also directly contact the power converting module  23 , to dissipate heat from the power converting module  23 .  FIGS. 4A and 4B  are schematic diagrams of heat dissipation of the assembly structure for providing power for a chip of the above embodiments. As shown in  FIG. 4A , the heat may be conducted from the power converting module  23  to the chip  22  through a connection between the power converting module  23  and the chip  22 , or it may be laterally conducted through the socket  25  and then conducted upwards. In order to conduct the heat of the power converting module  23  to surrounding elements more smoothly, heat conductive material may be filled in gaps between the power converting module  23  and the surrounding elements or gaps between respective adjacent parts. As shown in  FIG. 4A , heat conductive material  3  is directly filled between the power converting module  23  and the chip  22 , and between the socket  25  and the chip  22 . The heat may be conducted from the power converting module  23  or the socket  25  to the chip  22  through the heat conductive material  3 , and then conducted to the heat sink  24  through the chip  22 . As long as heat conductivity coefficient of the filled material is better than that of the air, it may facilitate heat conducting from the power converting module  23  to the surrounding elements. 
         [0052]    Heat of the power converting module  23  may be dissipated by being laterally conducted to other regions through the circuit board  21 . For example, the heat may be conducted to the support plate  27  through the circuit board  21  and then dissipated by the support plate  27 . As shown in  FIG. 4B , heat of the power converting module  23  may be conducted to a lower surface of the circuit board  21  in a vertical direction through a thermal via  4 , and then dissipated by the heat sink or a back plate  28  provided below. In order to conduct the heat of the power converting module  23  to the circuit board  21  and the surrounding elements more smoothly, heat conductive material may be filled in gaps between the power converting module  23  and the circuit board  21 , gaps between the circuit plate  21  and the surrounding elements or gaps between respective adjacent elements. Heat dissipation of the power converting module  23  may be realized by a combined mode as shown in  FIGS. 4A and 4B  or other modes. The present disclosure is not limited to this. 
         [0053]      FIG. 5  is a schematic diagram of an assembly structure for providing power for a chip of an embodiment of the present disclosure which includes an electromagnetic shielding layer  5 . Electromagnetic fields generated by power conversion exist around the power converting module  23 . If handled improperly, the electromagnetic fields will couple to the chip  22  nearby and/or peripheral circuits of the chip  22 , resulting in wrong operations of the chip  22 . This phenomenon is called electromagnetic interference (EMI). In order to prevent EMI, the electromagnetic shielding layer  5  may be installed around the power converting module  23 . If needed, the electromagnetic shielding layer  5  may be provided on one surface or a plurality of surfaces of the power converting module  23 , wherein the electromagnetic shielding layer on any surface may cover the surface entirely (overall shielding) or cover the surface partially (shadow shielding). At least a part of the electromagnetic shielding layer  5  may be located between the chip  22  and the power converting module  23 , and vertically stacked with the power converting module  23  and the chip  22 , to reduce or even eliminate mutual interference between the chip  22  and the power converting module  23 . Aiming at shielding of different purposes, such as electric shielding or magnetic shielding, material of the shielding layer  5  may be metal material (such as copper, aluminum and the like) or magnetic material (such as soft magnetic material) correspondingly. The shielding layer  5  may be installed as a separate component, or may be integrated together with the power converting module  23  and/or the socket  25 , or may be partly separated and partly integrated with other components. 
         [0054]    Stacking modes in the assembly structure for providing power for a chip of the above embodiments are that, the power converting module  23  and the chip  22  are located on the same side of the circuit board  21 .  FIG. 6  is another stacking mode of the assembly structure for providing power for a chip according to an embodiment of the present disclosure. A power converting module  63  and a chip  62  are respectively located on two opposite sides of a circuit board  61 . The power converting module  63  may electrically connect the chip  62  through the circuit board  61 . A heat sink (not shown) may be provided to directly contact the power converting module  63 . 
         [0055]      FIG. 6A  is a schematic diagram of an assembly structure for providing power for a chip according to another embodiment of the present disclosure. Compared with  FIG. 6 , the assembly structure for providing power for a chip further includes a socket  65  and a back plate  68 . The socket  65  is located between the chip  62  and the circuit board  61 , and electrically connects the chip  62  and the circuit board  61 . The power converting module  63  may be partly buried in the back plate  68 . An upper surface of the power converting module  63  may be exposed from the back plate  68 , and the upper surface of the power converting module  63  may contact a lower surface of the circuit board  61 . The power converting module  63  and the back plate  68  may be two components to be used separately or by being combined, or they may be integrated into an undetachable component, for example through molding technology or embedding technology used in packaging to bury the power converting module  63  in the back plate  68 . The present disclosure is not limited to this. 
         [0056]    The power converting module  63  includes an input and an output. The input of the power converting module  63  may be a power input or a signal input of the power converting module  63 , or including both. As shown in  FIG. 6B , input pins  631  provided on the upper surface of the power converting module  63  electrically connect the circuit board  61 . The power input and/or signal input may be directly transmitted to the power converting module  63  from the circuit board  61 , as shown by arrows in  FIG. 6B . As shown in  FIG. 6C , output pins  632  provided on the upper surface of the power converting module  63  electrically connect the circuit board  61 , and they may further connect the chip  62  through the circuit board  61  and the socket  65 . A power output and/or signal output may be transmitted from the power converting module  63  to the chip  62  through the circuit board  61  and the socket  65  in sequence. However, the present disclosure is not limited to this. For example, in some embodiments, the socket may be omitted. Combining with  FIG. 6C , a connecting mode between the pins  631  and  632  and the circuit board  61  may be welding or pressing. 
         [0057]      FIG. 6D  is a schematic diagram of an assembly structure for providing power for a chip of another embodiment of the present disclosure. It mainly differs from the embodiments as shown in  FIGS. 6A-6C  in that, the power converting module  63  is partly buried in the back plate  68 , a lower surface of the power converting module  63  is exposed from the back plate  68 , and the lower surface of the power converting module  63  directly contacts a connector  7 . The connector  7  is located below the back plate  68 , and may stride over the back plate  68  to connect the circuit board  61  with the power converting module  63 . However, the present disclosure is not limited to this, as long as the power converting module  63  may be electrically connected with the circuit board  61  or the chip  62 . Wherein the input pins  631  provided on the lower surface of the power converting module  63  may be connected with the connector  7 , and electrically connected with the circuit board  61  through the connector  7 . The power input and/or signal input may be transmitted from the circuit board  61  to the power converting module  63  through the connector  7 , as shown by arrows in  FIG. 6D . As shown in  FIG. 6E , the connector  7  may be partly located between the back plate  68  and the circuit board  61 . The power input and/or signal input in this structure may be shown by arrows in  FIG. 6E . The present disclosure is not limited to this, and a structure and a style of the connector  7  may be various. A connecting mode between the power converting module  63  and the connector  7  may be welding or pressing, etc. A connecting mode between the circuit board  61  and the connector  7  may be welding or pressing, etc. As shown in  FIG. 6E , a connection between the connector  7  and the circuit board  61  may be by welding. The back plate  68  may be used to press the connector  7  on the circuit board  61  and make pins (not shown in  FIG. 6E ) between them connected. A position at which the connector  7  connects the circuit board  61  may be located on one side or a plurality of sides of the power converting module  63 . The power output and/or signal output between the power converting module  63  and the circuit board  61  may be transmitted from the power converting module  63  through the pins  632  to the circuit board  61  via the connector  7 , as shown by arrows in  FIGS. 6F-6G  In one embodiment, the connector  7  may partly penetrate through the back plate  68 , but the present disclosure is not limited to this. In one embodiment, the connector  7  may be designed as a configuration or structure assisting heat dissipation. For example, the connector  7  itself may be made of heat conductive material. Furthermore, a heat sink (not shown) may be provided to contact the connector  7  for heat dissipation. 
         [0058]      FIG. 6H  is a schematic diagram of an assembly structure for providing power for a chip of a further embodiment of the present disclosure. It mainly differs from the embodiments as shown in  FIGS. 6A-6E  where the power converting module  63  is partly buried in the back plate  68  in that, in the present embodiment, the power converting module  63  is entirely buried in the back plate  68 . An Input of the power converting module  63  may connect the circuit board  61  through the back plate  68 . Power and/or signals are transmitted from the circuit board  61  to the back plate  68 , and then transmitted to the power converting module  63  through the back plate  68 . Connections of the power input and/or signal input between the power converting module  63  and the back plate may be on a side surface, an upper surface or a lower surface of the power converting module  63 , or may be on a plurality of surfaces, which is shown by the arrows in  FIG. 6H . As shown in  FIG. 6I , an output of the power converting module  63  may connect the chip  62  through the back plate  68 . Power and/or signals are transmitted from the power converting module  63  to the back plate  68 , and then transmitted to the circuit board  61 , the socket  65  and the chip  22  through the back plate  68  in sequence. However, the present disclosure is not limited to this. In some embodiments, the socket may be omitted. Connections of the power output and/or signal output between the power converting module  63  and the back plate  68  may be on a side surface, an upper surface or a lower surface of the power converting module  63 , or may be on a plurality of surfaces, which is shown by the arrows in  FIG. 6I . The power converting module  63  and the back plate  68  may be integrated into an undetachable entirety, and at this time, the connections between the power converting module  63  and the back plate  68  may be realized via conductors inside. The power converting module  63  and the back plate  68  may be detachable components. A connecting mode between the power converting module  63  and the back plate  68  may be welding or pressing, etc. 
         [0059]    An arrangement of the output pins  632  of the power converting module  63  may be determined according to corresponding pin positions of the chip  62 , the socket  65  or the circuit board  61 . For example, projections of the output pins  632  of the power converting module  63  and projections of the electrical energy input terminal of the chip in a direction perpendicular to the circuit board, are overlapped, to realize a shorter power and/or signal transmitting distance.  FIGS. 7A and 7B  are schematic diagrams of pin arrangements when the power converting module  63  directly connects the circuit board  61 , wherein  FIG. 7A  is a side view and  FIG. 7B  is a plan view. The power input pins  631  of the socket  65  are denoted by dashed circles, which may be distributed in different regions of surfaces of the socket  65 . Power received by respective regions may be different, which is denoted by current values in  FIG. 7B . The power output pins  632  (denoted by dashed boxes in  FIG. 7B ) of the power converting module  63  may be arranged according to positions of the power input pins  631  of the socket, distributed on surfaces of the power converting module  63 . Pins with different shapes, sizes, and/or materials may be used according to power demand of the regions they are located, to achieve an aim of reducing power transmission losses. The respective regions of surfaces of the power converting module  63  may have one or more pins. In the present embodiment, projections of the electrical energy input terminal of the chip and of the power output pins of the power converting module in a direction perpendicular to the circuit board, are overlapped, to further reduce current path length. However, the present disclosure is not limited to this. 
         [0060]    The input pins  631  and output pins  632  of the power converting module  63  may be located on the same surface (for example, a top surface or a bottom surface) or different surfaces of the power converting module  63 . Alternatively, the input pins  631  and output pins  632  of the power converting module  63  may be partly located on the same surface and partly located on different surfaces of the power converting module  63 . The input pins  631  and output pins  632  of the power converting module  63  may adopt the same connecting mode or different connecting modes to connect the circuit board  61  and the chip  62 . For example, in  FIG. 7C , a part of power input pins  6311  (for example, the input positive Vin+, the input negative Vin−, the auxiliary power supply and the like), a part of signal input pins  6312  (for example, the input voltage sampling, the input current sampling and the like), and a part of signal output pins  6322  (for example, the overcurrent warning signal, the module overheat warning signal and the like) of the power converting module  63  may be located on the bottom surface of the power converting module  63  and connected with the circuit board  61  through the connector  7 . A part of power output pins  6321  (for example, the output positive Vo+, the output negative Vo− and the like), a part of signal output pins  6322  (for example, the input current monitoring signal, the output current monitoring signal and the like), and a part of signal input pins  6312  (for example, the terminal voltage sampling signal of the chip and the like) may be located on the top surface of the power converting module  63  and connected with the chip  62  through the circuit board  61  and the socket  65  in sequence. A part of power input pins  6311  (for example, the input positive Vin+, the input negative Vin−, the auxiliary power supply and the like), a part of power output pins  6321  (for example, the output positive Vo+, the output negative Vo− and the like), a part of signal input pins  6312  (for example, the digital communication input and the like) and a part of signal output pins  6322  (for example, the digital communication output and the like) may be located on the side surface of the power converting module  63  and connected with the back plate  68 . 
         [0061]      FIGS. 8A-8E  are schematic diagrams of heat dissipation of the assembly structure for providing power for a chip of the above embodiments as shown in  FIGS. 6A-6E  As shown in  FIG. 8A , In order to conduct the heat of the power converting module  63  to the circuit board  61  and the back plate  68  more smoothly, heat conductive material  3  may be filled in gaps between the power converting module  63  and the circuit board  61 , gaps between the power converting module  63  and the back plate  68 , and gaps between the circuit board  61  and the back plate  68 . As shown in  FIG. 8B , heat of the power converting module  63  may be dissipated through a chassis  8  of the system. Heat conductive material  3  (for example, thermal conductive silicone or thermal pad and the like) may be filled in gaps between the power converting module  63  and the chassis  8 , gaps between the power converting module  63  and the back plate  68 , and gaps between the chassis  8  and the back plate  68 . As shown in  FIG. 8C , heat of the power converting module  63  may be dissipated through the connector  7 , or may be dissipated through a heat sink  64 ′ (a second heat sink) provided below the power converting module  63 . The heat sink  64 ′ may contact the connector, or may directly contact the power converting module  63 . The present disclosure is not limited to this. The connector  7  and the heat sink  64 ′ provided below the power converting module  63  may be separate components, or may be one component or may be molded as a whole, such as a structure as shown in  FIG. 8E . For example, by applying a process such as stamping, milling and so on, on the connector  7 , a wing shaped structure as shown in  FIG. 8C  is formed on a surface of the connector  7 . The similar process may be adopted to deal with a structure of the heat sink  64 ′ as shown in  FIG. 8D . The present disclosure is not limited to this. The difference between  FIGS. 8D and 8C  mainly lies in that the back plate  68  is omitted in  FIG. 8D . 
         [0062]    In order to prevent EMI, the electromagnetic shielding layer  5  may be installed around the power converting module  6 , as shown in  FIG. 9 . If needed, the electromagnetic shielding layer  5  may be provided on one surface or a plurality of surfaces of the power converting module  63 , wherein the electromagnetic shielding layer on any surface may cover the surface entirely (overall shielding) or cover the surface partially (shadow shielding). At least a part of the electromagnetic shielding layer may be located between the chip  62  and the power converting module  63 , and vertically stacked with the power converting module  63  and the chip  62 , to reduce or even eliminate mutual interference between the chip  62  and the power converting module  63 . Material of the shielding layer may be metal material (such as copper, aluminum and the like) or magnetic material (such as soft magnetic material) correspondingly. The shielding layer may be installed as a separate component, or may be integrated together with the power converting module  63  and/or the back plate  68 , or may be partly separated and partly integrated with other components. If the back plate  68  is entirely or locally made of metal material, the whole or a part of the metal material of the back plate  68  may be used to realize a function of electromagnetic shielding. 
         [0063]      FIG. 10  is a schematic diagram of stacking of an assembly structure  10  for providing power for a chip according to another embodiment of the present disclosure. The power converting module  103  (DC/DC) and the chip  102  is stacked in a vertical direction. The power converting module  103  penetrates through an opening in a circuit board  101  and electrically connects the chip  102 . 
         [0064]      FIG. 10  A is a schematic diagram of stacking of an assembly structure for providing power for a chip according to another embodiment of the present disclosure. It mainly differs from the assembly structure for providing power for a chip as shown in  FIG. 10  in that, it further includes a socket  105 , and the power converting module  103  may be partly buried in the socket  105 . As shown in  FIG. 10B , when thickness of the power converting module  103  is less than or equal to that of the circuit board  101 , the power converting module  103  may only penetrate through the circuit board  101  and may be not buried in the socket  105 . The power converting module  103  and the circuit board  101  in  FIGS. 10 and 10A  may be separate elements and may be assembled together later. As shown in  FIG. 10C , molding technology or embedded technology used in packaging may be adopted to integrate the power converting module  103  and the circuit board  101  into an undetachable component. In one embodiment, the power converting module  103  may be partly buried in the circuit board  11 . 
         [0065]    As shown in  FIG. 11 , the amount of the power converting module may be more than one, for example, two. These power converting modules may be located on the same side or different sides of the circuit board, or partly buried in the circuit board. The present disclosure is not limited to this. 
         [0066]    The above embodiments describe the modes that the power converting modules  23 ,  63  and  103 , the chips  22 ,  62  and  102  and the circuit boards  21 ,  61  and  101  are vertically stacked. Here, the power converting modules  23 ,  63  and  103  may contain power converting modules (or referred to as main circuit modules). Topological structures of a converting circuit of the power converting modules may have many choices, for example, a PWM (Pulse Width Modulation) type circuit (such as Buck, flyback, forward and the like). It may be a resonant type circuit (such as LLC (Inductor, Inductor and Capacitor) and the like) and so on. A control circuit that controls the converting circuit may be integrated into the power converting modules  23 ,  63  and  103 , or it may be separated out to form a separate control module. As shown in  FIG. 11A , the control module  69  (or referred to as a control circuit module) may be vertically stacked with the power converting module  69 ′, the chip  62  and the circuit board  61 . The positions of the power converting module  69 ′ and the control module  69  may be interchanged. The control module  69  and the power converting module  69 ′ may be on the same side of the circuit board, or may be partly buried in the circuit board. The present disclosure is not limited to this. The control module  69  may not be stacked with the power converting module  69 ′ and the chip  62  and the like, and may be disposed on one side of the circuit board  61 . Here, the position arrangements of the respective power converting modules  23 ,  63  and  103  described in the above embodiments are all applicable to the power converting module  69 ′ and/or the control module  69 . The power converting module  69 ′, the control module  69  and the chip  62  (for example, a CPU) may transmit signals through wireless communication or a wired way, etc. For example, connection and communication may be performed via signal lines (not shown in  FIG. 11A ) on the circuit board  61  or the socket  65 . The power converting modules  23 ,  63  and  103  may be a DC/DC module, but the present disclosure is not limited to this. 
         [0067]    As shown in  FIG. 11B , a first module (module  1 ) and a second module (module  2 ) may be the power converting module  69 ′, or may be the power converting modules  23 ,  63  and  103 . The first module and the second module (module  2 ) may be input-series, or in parallel, or cascading or a combination of these connecting modes. The present disclosure is not limited to this. For example, input-series-output-parallel or input-parallel-output-parallel may be adopted. The amount of the power converting modules and/or the power converting modules may be more than one. A plurality of modules may supply power for the chips, or other loads, or for the chips and other loads at the same time. A part or all of the plurality of modules may locate on the same side of the main board with the chips, or locate on the other sides of the main board, or penetrate through the opening in the main board, or be buried into the main board, or adopt any combination of the above ways. Connecting modes between the input and the output of any separate module among the plurality of modules and the system, arrangement and implementation modes of pins of the modules, implementation modes of heat dissipation and anti-interference of the modules may adopt one or more modes described in the above embodiments. 
         [0068]    The combined structures of the above embodiments may contain a socket, to facilitate the chip to perform connections of other signals with the circuit board. However, in fact, by the structure that the power converting module and the CPU are stacked, the CPU may perform the connections of other signals with the circuit board directly through the power converting module. As shown in  FIG. 11 , in the assembled structure, the two modules are located on two opposite sides of the main board respectively. The CPUs  22 ,  62  and  102  are provided on the second module (module  2 ). The heat sinks  24 ,  64  and  104  are provided on the CPUs  22 ,  62  and  102  to dissipate heat from the CPUs, or the heat sinks may be provided below the first module (module  1 ). The arrangement mode of pins of the second module (module  2 ) may adopt any one of the above embodiments. In one embodiment, the CPU may receive power source signal of the first module through pins of the second module, and provide some feedback control signals to the first module. In above embodiments, signal exchange between the CPU and other chips on the main board may be performed after the socket connects the circuit board, but the present disclosure is not limited thereto. In  FIG. 11 , the signal exchange may be performed by traces on the surfaces of the second module or inside the second module connecting the main boards  21 ,  61  and  101 . The second module may not only serve as a converting module to provide power source for the CPU, but also serve as a connecting structure to electrically connect the CPU and the main board. The present disclosure is not limited to this. 
         [0069]    In one embodiment, the circuit board, the CPU and the power converting module (such as a DC/DC converter) may form an assembly structure in a stacking sequence. For example, the stacking sequence may be the CPU on the DC/DC converter, then the DC/DC converter on the circuit board; or the CPU on the circuit board, then the circuit board on the DC/DC converter; or the CPU on the circuit board and the DC/DC converter being at least partly buried in the circuit board. The present disclosure is not limited to this. 
         [0070]      FIGS. 12A-12G  are schematic diagrams of several possible functions and mutual connection relationships between two modules. Two modules in  FIG. 12A  constitute a two-stage power supply mode. An input voltage of the module  1  is, for example, 400 V, 48 V or 12 V, and an output voltage of the module  2  is, for example, 12 V or a range of 0.5V-5 V. The present disclosure is not limited to this. Inputs and outputs of two modules in  FIG. 12B  are in parallel. Two power source modules in  FIG. 12C  are in the connection relationship of input-series-output-parallel, that is, their inputs are in series and their outputs are in parallel. Input ends of two power source modules in  FIG. 12D  are in parallel, and their outputs supply power for different loads respectively. Input ends of two power source modules in  FIG. 12E  are in series, and their outputs supply power for different loads respectively. A second module (module  2 ) and a first module (module  1 ) in  FIG. 12F  may communicate with each other. A first module in  FIG. 12G  may be a converting module, whose output is a power with a DC component and a high frequency AC (HFAC) component at the same time. A second module in  FIG. 12G  may be a filter module, which filters the HFAC component output by the first module and transmits the DC power to the chip (CPU). 
         [0071]    A numerical value of an input voltage or output voltage of the power source module or a combination of the power source module may be understood not only as a fixed value, but also as a range containing a given value. For example, an input voltage 400 V may be understood not only as the input voltage being 400 V, but also as a range containing 400 V (for example, 200V-500 V). Similarly, an input voltage 48 V may be understood as a range of 18V-72 V, and an input voltage 12 V may be understood as a range of 5V-15 V. The present disclosure is not limited to this. An output voltage, for example, 0.5V-5 V, may be understood as that the output voltage is a steady voltage which may be adjusted as needed. The present disclosure is not limited to this. A type of the power source module or a combination of the power source module may have many choices, for example, converting 400 V to 48 V, converting 400 V to 12 V, converting 400 V to 0.5-5 V, converting 48 V to 12 V, converting 48 V to 0.5-5 V, converting 12 V to 0.5-5 V and the like. The present disclosure is not limited to this. 
         [0072]    An electronic device according to one embodiment of the present disclosure, including: the assembly structure described above. Wherein the electronic device is, for example, a server or a computer. 
         [0073]    Exemplary implementations of the present disclosure have been specifically shown and described above. It should be understood that the present disclosure is not limited to the disclosed implementations. Instead, the present disclosure intends to cover various modifications and equivalent replacements within the scope of the appended claims.