TW201104399A - Power suplly system and method - Google Patents

Abstract

A power supply system includes a power supply, a daughter board, and a motherboard. Output currents of power connectors of the motherboard and equivalent resistances of copper between every two adjacent power connectors of the motherboard are obtained via simulation. A voltage of one power connector of the motherboard is defined. Therefore, equivalent resistances between VRM connectors and corresponding power connectors of the daughter board are obtained via calculations to make currents passing through the power connectors of the motherboard are balanced. A power supply method is also provided.

Description

201104399 VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a power supply system and method. [Prior Art] [0002] The main power supply of the motherboard in the computer, such as 1 2V, 5V, and 3. 3V, is provided by an external power supply. The conventional large computer server workstation, medium power supply is generally connected to the power connector of the motherboard through the power connector of the daughter board. The daughter board is used as an electrical source or a variety of 1/0 signal adapter boards. When the motherboard has a large current demand, the current supplied by the power supply is often supplied to the load on the motherboard through more than two power connectors to reduce the excessive power flow through the single power connector. Temperature rise. [〇〇〇3] However, when the motherboard has multiple power connectors, the relative positions of the power connectors and the load on the motherboard are different, and the current generally flows to the load in the shortest path, thus causing a negative The most recent power connector is subjected to excessive current, and the current flowing through the remaining power connectors is too small, which causes the overcurrent power connector to rise in temperature, affecting the quality of the power supply, or even burning the power connector or damaging the motherboard. . SUMMARY OF THE INVENTION [0004] In view of the foregoing, it is desirable to provide a power supply system and method for balancing current through various power connectors on a motherboard. [0005] A power supply system, comprising: [0006] a power supply for providing a servo voltage; [0007] a daughter board comprising a first VRM connector, a second VRM connector, a 098125857 Form No. A0101 Page 3 of 17 0982044349-0 201104399 First-power connection - and - second power connector, the first VRM connector and the first connection H are connected to the power supply to receive the working power? . The first VRM connector is connected to the first power connector through a first copper connector, and the second VRM connector is connected to the second power connector through a second copper port; and [0008]

a motherboard including a third power connector, a fourth power connector, and a plurality of loads, the third power connector being connected to the fourth power connector through a third copper foil, the third power connector and the third power connector The four power connectors are respectively connected to the first power connector and the second power connector on the daughter board to receive the working voltage, wherein the difference between the equivalent impedance of the first copper foil and the second copper foil is equal to the host The potential difference between the third power connector and the fourth power connector on the board is divided by the average of the output currents of the two.

A power supply method for supplying power to a motherboard through a power supply board, the daughter board including a first VRM connector and a second VRM

a first power connector and a second power connector, the motherboard includes a third power connector, a fourth power connector, and a plurality of the first VRM connector and the second VRM connector The device is connected to the power supply to receive an operating voltage, and the third power connector and the fourth power connector on the motherboard are respectively connected to the first power connector and the second power connector on the daughter board to receive the The working voltage is supplied to the loads, the first VRM connector is connected to the first power connector through a first copper foil, and the second VRM connector is connected to the second power connector through the second copper port. The three power connector is connected to the fourth power connector through a third copper foil, and the power supply method includes: [0010] 098125857 Patrol analog simulation provides the working voltage to the H call number A0101 茁 4 hundred / mound 17 hundred 4 pages/total 17 pages 0982044349-0 201104399 Connector 'fourth power connector to get the third and the first output current; four power connection [0011] [0013] [0014] [0015] According to the third power connection Average current is obtained; the output current of the fourth power connector is obtained through simulation to obtain the equivalent impedance of the third copper foil on the motherboard; (4) the third copper (four) equivalent impedance on the motherboard is multiplied by the third The difference between the output current of the power connection thief and the fourth power connector and the average current, thereby determining the electrical waste difference between the third power connector and the fourth power connector; 疋义》海第—Power connector The voltage value 'divides the difference between the operating voltage provided by the auxiliary source supply and the voltage value of the third power connector by the average electric power to obtain the first power connector and the first gamma connector on the daughter board The equivalent impedance of the first ~_; the fourth power connection is obtained by subtracting the voltage difference between the third power connection and the fourth power connector by the value of the second power connection 11 Dividing the difference between the operating voltage provided by the power supply and the voltage value of the fourth electrical connector by the average current, thereby obtaining a second between the first power connector and the second VRM connector on the daughter board The equivalent impedance of the copper box. [0016] 098125857 H supply system and method through the analog simulation to find the output current of each power connector on the motherboard and the equivalent impedance of each other (four), and deny the voltage value of one of the power connectors, thereby calculating the difference Find the equivalent impedance of the copper name between each power connector on the daughter board and the VRM connector connected to it'. Design the daughter board so that it flows through the form number on the motherboard A0101 Page 5 of 17 0982044349-0 201104399 The currents of the power connectors are equal. [Embodiment] [0019] [0019] 098125857 Referring to FIG. 1, a preferred embodiment of the power supply system 1A of the present invention includes a power supply 10 , a daughter board 20 and a motherboard 3 〇. The daughter board 20 includes a first VRM (Voltage Regulator Module) connector VRC1, a second VRM connector VRC2, a first power connector PWC1, and a second power connector PWC2. The motherboard 30 includes a third power connector PWC3, a fourth power connector pwc4, and four loads LI, L2, L3, and L4. The daughter board 20 is connected to the power supply unit 1 through the first VRM connector VRC1 and the soil VRM connector VRC2. The first power connector PWC1 and the second power connector PWC2 of the daughter board 2 are connected to the third power connector PWC3 and the fourth power connector PWC4 of the motherboard 3A. The power supply 10 passes through the first VRM connector VRC1, the second VRM connector VRC2, the first power connector PWC1, the second power connector PWC2, the third power connector PWC3, and the fourth power connector PWC4. The load U-L4 on board 30 is powered. The first VRM connector VRC1 on the daughter board 20 is connected to the first power connector PWC1 through the first copper foil 21. The second VRM connector VRC2 is connected to the second power connector PWC2 through the second copper foil 22. . The equivalent impedance of the first copper foil 21 is R1, and the equivalent impedance of the second copper foil 22 is R2. The third power connector PWC3 and the fourth power connector PWC4 are connected by a third copper foil 31. The equivalent impedance of the third copper foil 31 is RC. The present invention transmits the first power supply form number A0101 on the sub-board 20 by setting the equivalent impedance R1 of the first copper foil 21 on the sub-board 20 and the equivalent impedance R2 of the second copper foil 22. 0982044349-0 [0020] 201104399 The output currents of the connector PWC1 and the second power connector pwc2 are equal, so that the current flowing through the third power connector pwc3 and the fourth power connector PWC4 on the motherboard 30 are equal, avoiding The current flowing through the third power connector PWC3 on the motherboard 3A and the fourth power connector PWC4 are too large. [0021] As shown in FIG. 2, the present invention provides a power supply method, which explains in detail how to obtain the equivalent impedances R1 and R2 of the first copper foil 21 and the second copper foil 2 2 in a reverse thrust manner. Therefore, the current flowing through the PWC3 and the PWC4 is equal, and the power supply method includes the following steps. ... : ..... .... . . . Step S1: As shown in Figure 3, through the analog simulation software simulation, the third power connector PWC3 and the fourth power connector Pff4 of the motherboard 30 are added. 12V operating voltage. In the present embodiment, the rated operating current of the load L1_L4 is set to be 20. 6A, and the rated operating voltage is 12V. The power supply 10 provides an operating voltage of 12Ve [0023] ❹ Thus, the output current of the third electromagnetism connector PWC3 is 11=33·7A, and the fourth power connector PWC4 is obtained through the simulation software. The output current is 12=48. 7A. Since the third power connector PWC3 and the fourth power connector PWC4 must be equal, the current flowing through the third power connector PWC3 and the fourth power connector PWC4 is the third power connector PWC3. The average current of the output current II and the output current 12 of the fourth power connector PWC4 is I = (11 +12) / 2 = (33. 7A+48. 7Α)/2=41· 2A. At this time, the current flowing through the third power connector PWC3 to the fourth power connector PWC4 is obtained 1041. 2-33. 7 = 48. 7-41. 2 = 7. 5Α. 098125857 Form No. 1010101 Page 7 of 17 0982044349-0 201104399 [Surface] Step S2: Equivalent of the third copper foil 31 between the third power connector PWC3 and the fourth power connector PWC4 through the analog simulation software Impedance = 0 · 634422ιηΩ. Therefore, the voltage difference between the third power connector PWC3 and the fourth power connector PWC4 is Δ V = RC wood lc = 〇. 634422 ιηΩ * 7. 5A = 4. 758165 mV. [0025] Step S3: taking the voltage of the third power connector PWC3 ^ ^ 92V. Theoretically, the voltage V1 of the third power connector pWC3 should be equal to the rated operating voltage of the load τ ! T , L , f , -L4 , 1 gv , because the power supply 1 〇 provides the operating voltage of 12V through the daughter board The voltage of the third power connector PWC3 is 11.92V. In other embodiments, the voltage of the third power connector PWC3 is also less than 12V. Other values can be set. Thereby, the equivalent impedance of the first copper foil 21 between the first power connector PWC1 on the daughter board 2A and the first VRM connector VRC1 can be obtained.

R1=(12V-V1)/I=(12V-11 92)/41.2A=1.94175 mQ. [0026] Step S4: The voltage value of the fourth power connector pwC4 on the motherboard 30 is V2=V1- Δ ν = 11· 758165mV=ll. 915242V, so on the daughter board 20

The equivalent impedance of the second copper foil 22 between the second power connector PWC2 and the second VRM connector VRC2 is R2 = (12V - V2) / I = (12V - 1. 1. 915242V) / 41.2A = 2.057234 W. 098125857 Form No. 1010101 Page 8 of 17 0982044349-0 201104399 [0027] Thus, the equivalent impedance R1 of the first copper foil 21 between the first power connector VR C1 on the daughter board 20 is set to 1. 9 417 5 m Ω, the equivalent impedance R2 of the second copper box 22 between the second power connector PWC4 and the VRM2 connector VRC2 is set to 2.057234 πιΩ, so that the flow through the motherboard 30 The current of the three power connector PWC3 and the fourth power connector PWC4 are both 41. μ. [0028] In other embodiments, the steps of the power supply method described above may be reversed without being limited to the above order. For example, the analog RC of the third copper foil 31 between the third power supply of the motherboard 3, the filler PC 3 and the fourth power connector PWC4 can be obtained through the analog simulation software, or the motherboard can be set first. 3, the voltage value VI on the third power connector PWC, and then through the analog simulation software to obtain the output current II, 12 of the third power connector PWC3 and the fourth power connector PWC4 on the motherboard 30, and finally through calculation The equivalent impedance R1 of the first copper box 21 between the first power connector PWC 1 and the first VRM connector VRC1 and the second between the second power connector pwC2 and the second VRM connector VRC2 The equivalent impedance R2 of the copper foil 22. 〇 [0029] Alternatively, the relationship between the equivalent impedance R1 of the first copper foil 21 on the daughter board and the equivalent impedance R2 of the second copper foil 22 is R2-R1 =

A

V/I, that is, the difference between the equivalent impedance ri of the first copper foil 21 on the daughter board 2 and the equivalent impedance R2 of the second copper foil 22 is equal to the potential difference of the power connectors PWC3, PWC4 on the motherboard 30 divided by Average current I of output currents 11, 12

[0030] In addition, according to R2-R1 = 098125857, the table number is A0101, page 9 / page 17 0982044349-0 201104399

A v / 卜 (10) RC) / 卜 [I2 - (I1 + I2) / 2] * 2Rc " ii + i2), that is, when the voltage value of the third power connector pwC3 on the motherboard 30 is determined, The simulation can obtain the output current u, 12 of the third power connector PWC3 and the fourth power connector pwc4 on the motherboard 3, and the third copper resistance of the third copper can be used to design the daughter board 20 by the above method. [0031] When there are more than two power connectors on the motherboard 30, the equivalent impedance between the power connector and the VRM connector on the daughter board can also be set according to the above method, so that The current flowing through the power connector on the motherboard 3() is equal, so that a power connector on the motherboard 3 is subjected to excessive current to cause the power connector to burn or damage the motherboard. (10) and the square domain depends on the simulation to obtain the output current of each power connector on the motherboard 30 and the equivalent impedance of the copper box between each other' and define the electric house value of one of the power connectors, thereby obtaining the daughter boards respectively through calculation 20 between the various power adapters and the connector connected to Xiao (four) Impedance, the sub-board 2 () is designed to make the current flowing through the respective power connectors on the motherboard 30 equal. The invention is in accordance with the invention special wealth, and the patent application is processed. The present invention is only intended to be a preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art of the present invention should be included in the following claims. A block diagram of a preferred embodiment of the power supply system of the present invention. 098125857 Form No. A0101 Page 10 of 17 0982044349-0 201104399 [0035] FIG. 2 is a preferred embodiment of the power supply method of the present invention. [0036] Fig. 3 is an equivalent circuit diagram of the power supply system analogy simulation of the present invention. [Main component symbol description] Power supply system 100 Power supply 10 Sub board 20 Mother board 30 First copper foil 21 Two copper foil 22 Third copper foil 31 ❹ 〇 098125857 Form No. A0101 Page 11 of 17 0982044349-0

Claims (1)

201104399 VII. Patent application scope: 1. A power supply system, comprising: a power supply 'for providing a working voltage; - a sub-board, including a -VRM connector, a second vrm connection, crying, - the first: a power connector and a second power connector, the first _vrm connector and the second VRM connector are connected to the power supply to receive the operating voltage, and the first-VRM connector and the first-power connector are transmitted through - _ copper box connected 'the second VRM connector is connected to the second power connector through the second copper cymbal; and 4 - the motherboard s includes a third power connector, a fourth power connector and a plurality of loads, The third power connector is connected to the fourth power connector through the third (fourth), the third power source is far away, and the first power connector and the fourth power connector are respectively connected to the first power connector on the daughter board And the second power connector is connected to connect (4) the working voltage 'where the difference between the first steel drop and the equivalent resistance of the second copper box is equal to the third power connector on the motherboard, and the fourth (four) connection (four) The potential difference is divided by the two The average current. 2. The power supply system of claim i, wherein the potential difference between the third power connector and the thunder 3 #4 power connector on the motherboard is equal to the output current of the two - and both rounds The difference between the average values of the currents is multiplied by the equivalent impedance of the copper foil. 3. The power supply system of claim 2, wherein the third power connector, the fourth power connector, and the equivalent impedance of the first three copper foils are transmitted through simulation Find out. 4 · If you apply for a patent scope! The power supply system of the item wherein the first copper drop has an equivalent impedance of 1.941 75 mQ. 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。. 6. A power supply method for supplying power to a motherboard through a daughter board, the slave board comprising a first VRM connector, a second VRM connector, a first power connector, and a first a power connector, the motherboard includes a third power connector, a fourth power connector, and a plurality of loads, the first VRM connector, and the second connector is connected to the power supply to receive a voltage, the motherboard The upper third power connector and the fourth power connector are respectively connected to the first power connector and the second power connector on the daughter board to connect (4) the health voltage to the plurality of power, the first VRM connection The first power connector is connected to the first copper foil, the second power connector is connected to the second power connector through a second copper foil, and the third power connector is transmitted through a third copper foil · Four power connector connection 'The power supply method includes: providing the work # voltage to the third power connector and the fourth power connector on the motherboard through the analogy to obtain the third and first power connectors ^ The current is obtained according to the output current of the second power connector and the fourth power connector; the equivalent impedance of the third steel foil on the motherboard is obtained through simulation; The equivalent impedance of the second copper foil is multiplied by the difference between the output current of the third power connector and the fourth power connector and the average current, thereby obtaining a relationship between the second power connector and the fourth power connector Voltage difference; Define the voltage value of the third power connector, and divide the difference between the operating voltage supplied by the power supply and the voltage value of the S-Second power connector by the average 098125857 Form No. A0101 Page 13 / A total of 17 pages 〇 982 〇 201104399 current, thereby obtaining the equivalent impedance of the first copper foil between the first power connector and the first VRM connector on the daughter board; and the voltage of the third power connector to be defined Subtracting the voltage difference between the third power connector and the fourth power connector to determine the voltage value of the fourth power connector, and the operating voltage provided by the power supply and the voltage of the fourth power connector The difference is divided by the average current to obtain an equivalent impedance 〇7 of the second copper foil between the second power connector and the second VRM connector on the daughter board. As described in claim 6 A power supply method, wherein the first copper foil has an equivalent impedance of 1.94175 ιηΩ. 8. The power supply method according to claim 7, wherein the second copper foil has an equivalent impedance of 2.057234 ιηΩ. 098125857 Form No. Α0101 Page 14 of 17 0982044349-0