CN101303617A - Parallel power supply system, computer and power supply method thereof - Google Patents

Abstract

The invention discloses a parallel power supply system, a computer and a power supply method thereof. The parallel power supply system includes: a first power supply having a first voltage output terminal; a second power supply having a second voltage output terminal; an input end of a first switch circuit is connected to the first voltage output end; one input end of the second switch circuit is connected to the second voltage output end; the plug is provided with a first pin and is simultaneously connected to an output end of the first switch circuit and an output end of the second switch circuit; the first voltage output end and the second voltage output end output the same voltage. As long as one of the two groups of power supplies can be started normally and establish the voltage required by the mainboard, the group of power supplies can supply power to the mainboard.

Description

Parallel power supply system, computer and power supply method thereof

technical field

The invention relates to a power supply system of a computer, in particular to a power supply system adopting parallel double sets of power supplies and a power supply method thereof.

Background technique

In order to provide the working power required by the internal circuit components of the computer, the motherboard in the computer is connected to a power supply (Power Supply), and the power supply can convert AC power into DC and supply it to the motherboard of the computer and its peripheral devices. Please refer to FIG. 1 , which shows a schematic diagram of a known power supply system supplying power to a computer motherboard (Motherboard). The system mainly includes: a set of power supplies 80 and a motherboard 90 . As shown in Figure 1, the power supply 80 has a group of pins, and the group of pins includes a 24-pin (24pin), a 4-pin (4pin), a graphics card pin (VGA pin) and a hard disk pin (HD pin). The above-mentioned pins are individually connected to a 24-pin plug (24pin plug) 82, a 4-pin plug (4pin plug) 84, a graphics card plug (VGA plug) 86 and a hard disk plug (HD plug) 88 through transmission lines. The motherboard 90 also has a corresponding 24-pin jack (24pin jack) 92, a 4-pin jack (4pin jack) 94, a graphics card jack (VGA jack) 96 and a hard disk jack (HD jack) 98.

Therefore, when the plug of the power supply 80 is connected to the socket of the motherboard 90, the power supply 80 can provide voltages of different levels such as +3V, +5V, +5VSB (+5V Stand-By-Power), +12V, etc. to the main board 90 , and then the power supply 80 supplies power to different components on the main board 90 with different levels of voltage.

Generally, users will not turn off the main switch of the power supply after the computer system is shut down, so the power supply will continue to provide standby power for the motherboard, such as +5VSB. In the long run, due to the different use time of the standby power circuit and other circuits in the power supply, the related circuits of the standby power in the power supply will be easily damaged. That is to say, when other circuits in the power supply can still be used, the circuit of the standby power supply has been damaged. Therefore, the user must replace the power supply with a new one.

Contents of the invention

The present invention is a parallel power supply system applied to a main board, comprising: a first power supply with a first voltage output terminal; a second power supply with a second voltage output terminal; An input terminal of a first switch circuit is connected to the first voltage output terminal; an input terminal of a second switch circuit is connected to the second voltage output terminal; and a plug has a first pin connected to the first switch circuit at the same time An output end of the second switch circuit and an output end of the second switch circuit; wherein, the first voltage output end and the second voltage output end output the same voltage.

The present invention also proposes a computer with a parallel power supply system, including: a first power supply with a first voltage output terminal; a second power supply with a second voltage output terminal; a first power supply An input end of a switch circuit is connected to the first voltage output end; an input end of a second switch circuit is connected to the second voltage output end; a plug has a first pin connected to the first switch circuit at the same time An output end and an output end of the second switch circuit; and, a main board, has a socket that can be connected with the plug so that a first pin on the socket is connected to the first pin of the plug; wherein, the first voltage output end Output the same voltage as the second voltage output terminal.

The present invention also proposes a power supply method for a power supply system, which is applied to a first power supply and a second power supply to provide a first voltage to a motherboard, including the following steps: detecting whether the first power supply Start to build up the first voltage; when the first voltage of the first power supply starts to build up, connect the first voltage built up by the first power supply to a first pin; detect whether the second power supply starts to build up the first voltage; when the first voltage of the second power supply starts to build up, connecting the first voltage built up by the second power supply to the first pin; and, using the first pin to provide the first voltage to the motherboard.

By connecting the power adapter boards in the double power supply system of the present invention in parallel, as long as one of the two power supplies can start normally and establish the voltage required by the main board, the power supply can supply power to the main board.

Description of drawings

FIG. 1 is a schematic diagram of a known power supply system supplying power to a computer motherboard.

FIG. 2 is a schematic diagram of the application of the parallel dual-group power supply system of the present invention to a motherboard.

FIG. 3 is a schematic block diagram of a power adapter board in the parallel dual power supply system of the present invention.

Fig. 4 is a schematic diagram of the switching circuit of the present invention.

Fig. 5 is an actual circuit diagram of the switching circuit of the present invention.

Fig. 6 is a flowchart showing the operation of the switching circuit of the present invention.

Detailed ways

Please refer to FIG. 2 , which is a schematic diagram of applying the parallel dual power supply system of the present invention to a motherboard. The power supply system mainly includes: a power supply A, a power supply B and a power adapter board 140 (Power Translate Board), and the power supply system is connected with a main board 142 . As shown, power supply A has its own set of pins: 24 pin A, 4 pin A, VGA pin A, HD pin A; power supply B also has its own set of pins: 24 Pin B, 4 Pin B, VGA Pin B, HD Pin B.

Moreover, a set of pins of the power supply A is connected to a first switchset 158, and a set of pins of the power supply B is connected to a second switchset 168, and , the first switch group 158 and the second switch group 168 are connected to each other to realize the parallel connection of the output voltages of the power supply A and the power supply B. Furthermore, the 24-pin, 4-pin, VGA pin and HD pin connected in parallel are respectively connected to a 24-pin plug 82 , a 4-pin plug 84 , a VGA plug 86 , and a HD plug 88 . The motherboard 142 also has a 24-pin socket 92 , a 4-pin socket 94 , a graphics card socket 96 , and a hard disk socket 98 that are connected correspondingly.

Firstly, when the mainboard 142 is not started, the power supplies A and B only provide basic standby power for the mainboard, such as +5VSB. When the switch of the motherboard is pressed down, the power supplies A and B start immediately. At this time, there will be multiple voltage output terminals in the pins of the power supplies A and B. Voltage (+3V, +5V, +5VSB, +12V). The voltages of different levels generated by the power supply A are first output by a set of pins of the power supply A, and then transmitted to the main board 142 through the power adapter board 140 . Similarly, the voltages of different levels generated by the power supply B will be output from a pin of the power supply B first, and then transmitted to the main board 142 through the power adapter board 140 . Since the power supplies A and B are connected in parallel, when only one of the power supplies A and B starts up successfully and starts to build voltages of different levels, the main board 142 receives the output voltage of the power adapter board 140, and then completes the process. The power supplies A and B supply power to the motherboard 142 .

Please refer to FIG. 3 , which is a block diagram of the power adapter board in the parallel dual power supply system of the present invention. As shown in the figure, the 24-pin C, 4-pin C, VGA pin C, and HD pin C of the power adapter board 140 are correspondingly connected to the 24-pin A, 4-pin A, and VGA pins of the power supply A. A, HD pin A; and 24 pins D, 4 pins D, VGA pin D, HD pin D of the power adapter board 140 are correspondingly connected to 24 pins B, 4 pins B of the power supply B , VGA pin B, HD pin B. Moreover, the first switch group 158 includes seven switch circuits, and the second switch group 168 includes seven switch circuits.

Wherein, the +3V output terminal of the 24-pin C is connected to the 24-pin plug 82 via the switch circuit A1 (SW-A1), and the +5V output terminal is connected to the 24-pin plug 82 via the switch circuit A2 (SW-A2), +12V output to 24-pin header 82 via switch circuit A3 (SW-A3), +5VSB output to 24-pin header 82 via switch circuit A4 (SW-A4); +12V in 4-pin C The output is connected to 4-pin header 84 via switch circuit A5 (SW-A5); the +12V output in VGA pin C is connected to VGA pin header 86 via switch circuit A6 (SW-A6); and the HD pin The +12V output in C is connected to HD pin plug 88 via switch circuit A7 (SW-A7).

Similarly, the +3V output terminal of the 24-pin D is connected to the 24-pin plug 82 via the switch circuit B1 (SW-B1), and the +5V output terminal is connected to the 24-pin plug 82 via the switch circuit B2 (SW-B2). , the +12V output terminal is connected to the 24-pin plug 82 via the switch circuit B3 (SW-B3), and the +5VSB output terminal is connected to the 24-pin plug 82 via the switch circuit B4 (SW-B4); the + in the 4-pin D The 12V output is connected to 4-pin header 84 via switch circuit B5 (SW-B5); the +12V output in VGA pin D is connected to VGA pin header 86 via switch circuit B6 (SW-B6); and the HD pin The +12V output in pin D is connected to HD pin plug 88 via switch circuit B7 (SW-B7).

When the user presses the power button of the computer, the motherboard can generate a power switch on signal PSON (power switch on signal), which is transmitted to the 24-pin plug 82 of the power adapter board 140 via the 24-pin socket 92 of the motherboard in FIG. 2 . The power adapter board 140 transmits the start signal PSON to the 24-pin A of the power supply A and the 24-pin B of the power supply B through the 24-pin C and the 24-pin D respectively, so that the power supply A and the power supply The provider B can be started according to the start signal PSON.

When power supply A and power supply B start up, it means that all output voltages of power supply A and power supply B have reached a steady state. At this time, the power supply A and the power supply B respectively output a power good signal PG (power good signal). That is to say, when the power supply A reaches the steady state, it will output the power A good signal PG-A, and when the power supply B reaches the steady state, it will output the power B good signal PG-B.

According to an embodiment of the present invention, the power supply A good signal PG-A and the power supply B good signal PG-B are connected to an input terminal of an OR gate (OR gate) 162, and the output terminal of the OR gate 162 is connected to a 24-pin plug 82. That is to say, when any power supply reaches a steady state, the output terminal of the OR gate 162 can generate a power good signal PG and transmit it to the main board. Therefore, the motherboard can know that the voltage of the power supply system (including the power supply A and the power supply B) has reached a steady state according to the power good signal PG. Of course, the present invention can also change the OR gate 162 into an AND gate, that is, when all power supplies reach a steady state, the output terminal of the AND gate can generate a power good signal PG and transmit it to the main board.

Furthermore, please refer to FIG. 4 , which is a schematic diagram of the switching circuit of the present invention. According to the embodiment of the present invention, all the switch circuit structures are the same. The switch circuit includes: a switch 200 and a detection circuit 210 . Wherein, an input terminal Si and an output terminal So of the switch 200 can be connected or not connected to the output terminal So through the control signal C output by the detection circuit 210 . The detection circuit has two detection terminals D1 and D2 respectively connected to the input terminal Si and the output terminal So of the switch 200 . When the voltage of the first detection terminal D1 is greater than the voltage of the second detection terminal D2, the control signal C controls the switch to achieve connection; otherwise, when the voltage of the first detection terminal D1 is not greater than the voltage of the second detection terminal D2, the control signal C Signal C controls the switch to achieve no connection. Furthermore, the input terminals Si of the switches are connected to the corresponding pins on the A or B side (power supply side) of the corresponding power supply, and the output terminals So of the switches are connected to the corresponding pins on the plug side (plug side). .

Please refer to FIG. 5 , which shows the actual circuit diagram of the switching circuit of the present invention. The switch 200 includes two transistors (MOSFET) back-to-back connection configuration, that is, the bodies of the two transistors are connected. In this way, the diode (Body Diode) generated inside the transistor itself can block the power supply from both sides. Power supply A or B leaks electricity to the motherboard or the motherboard side leaks electricity to power supply A or B to ensure that when it is working normally, the flow direction of the power supply is consistent and output to the motherboard side, and it will not be caused when a certain group of power supplies is turned off. There is also a path for excess current to flow into the power supply. Moreover, in order to ensure that the detection circuit 210 can control the switch smoothly, the control signal is +24V. In order to reach +24V, the detection circuit 210 may include a booster circuit (voltage booster) to boost the +5V standby voltage (+5VSB) to +24V (+24VSB), so that the detection circuit 210 can selectively +24V output to switch 200 . Furthermore, since the boost circuit has already been applied to many known control circuits, the present invention will not be described in detail.

In order to specifically explain the working principle of the switch in the power adapter board, the +5V voltage provided by the power supply will be controlled by the switch circuit and finally transmitted to the main board for illustration. It can be seen from FIG. 5 that the +5V voltage available from the power supply side is connected to the input terminal Si of the switch 200 , and the output terminal So of the switch 200 is connected to the side of the 24-pin plug 82 .

Since the two detection terminals D1 and D2 of the detection circuit are respectively connected to the input terminal Si and the output terminal So of the switch 200 . When the voltage of the first detection terminal D1 is greater than the voltage of the second detection terminal D2, the control signal C is +24V and the control switch 200 is connected so that the +5V voltage can be output from the power supply side to the 24-pin plug 82 side; otherwise , when the voltage of the first detection terminal D1 is not greater than the voltage of the second detection terminal D2, the control signal C is not +24V and the control switch 200 is not connected so that the +5V voltage cannot be output from the power supply side to the 24 pin Plug 82 side.

That is to say, when the user presses the power button of the computer, the motherboard generates the activation signal PSON to activate the power supply A and the power supply B. During the start-up process of the power supply A and the power supply B, the voltages of all voltage output terminals (+3V, +5V, +12V) start to rise. Furthermore, during the voltage rising process, the detection circuits 210 in all the switch circuits detect that the voltage at the input end Si of the switch 200 is greater than the voltage at the output end So, and therefore, all the switch circuits are connected. Finally, when the power supply A or the power supply B outputs the power A good signal PG-A or the power B good signal PG-B, the main board can receive the power good signal PG to make the main board start up smoothly.

Furthermore, assume that the +5V output terminal of the power supply A in the power supply system fails to output +5V normally, for example, it can only output 1.5V. Obviously, the voltage on side A of the power supply (1.5V) is lower than the side (5V) of the 24-pin plug 82. At this time, the switch circuit SW-A1 is disconnected and the side A of the power supply cannot supply voltage to the motherboard. At this time, only the +5V output terminal of the power supply B can output the voltage to the motherboard through the switch circuit SW-B1. Similarly, the other voltage terminals also use the same principle to operate, and thus will not be described in detail.

Please refer to FIG. 6 , which shows a flow chart of the operation of the parallel dual power supply system of the present invention (taking power supply A as an example). When the user has not pressed the power button of the computer, the power supply remains in the standby state, as in step 652 . At this time, the power supply provides +5VSB to the main board, and the boost circuit in the detection circuit boosts +5VSB to +24V, as in step 654 .

At step 656, if the user has not yet pressed the power button of the computer, the mainboard does not generate the activation signal PSON, and returns to step 654. On the contrary, if the user presses the power button of the computer, the motherboard generates the start signal PSON, as in step 656.

Afterwards, the power supply starts to build up the voltage, that is, the voltages of all voltage output terminals (+3V, +5V, +12V) of the power supply start to rise, such as step 658; The detection circuit detects that the voltage at the input terminal Si of the switch is greater than the voltage at the output terminal So, so all the switch circuits are connected, as in step 660, and the main board receives the output voltage of the power adapter board, as in step 662. The above step 658, step 660, and step 662 occur almost at the same time.

Finally, when the power supply has output voltages (+3V, +5V, +12V) stably, it can output a power good signal PG-A to notify the motherboard, such as step 664 .

As can be seen from the above embodiments, through the power adapter board in the parallel dual-group power supply system of the present invention, as long as one of the two groups of power supplies can start normally and establish the voltage required by the main board, the group of power supplies can be It can supply power to the motherboard; in addition, through the back-to-back connection configuration of transistors PQ1 and PQ2 in the switch, it can also ensure that when the power supply supplies power to the motherboard, the current is consistently output to the motherboard without leakage current; in addition, through The detection circuit in the switch controls whether the switch is connected or not. Even if one of the power supplies is suddenly damaged, it can still output normal voltage to the main board.

In summary, although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims (19)

1. a parallel power supply system is characterized in that, comprises:

First power supply unit has first voltage output end;

The second source supply has second voltage output end;

First on-off circuit, the input end of above-mentioned first on-off circuit are connected to above-mentioned first voltage output end;

Second switch circuit, the input end of above-mentioned second switch circuit are connected to above-mentioned second voltage output end; And

Plug has first pin and is connected to the output terminal of above-mentioned first on-off circuit and the output terminal of above-mentioned second switch circuit simultaneously;

Wherein, above-mentioned first voltage output end and the identical voltage of above-mentioned second voltage output end output.

2. power supply unit according to claim 1 system, it is characterized in that, wherein above-mentioned plug also comprises second pin in order to receiving the enabling signal that mainboard produces, and above-mentioned plug also is passed to above-mentioned first power supply unit and above-mentioned second source supply with above-mentioned enabling signal.

3. power supply unit according to claim 1 system, it is characterized in that, above-mentioned power supply unit system also comprises logic gate, wherein above-mentioned logic gate has two input ends, connect above-mentioned first power supply unit and above-mentioned second source supply respectively, and have the 3rd pin that output terminal connects above-mentioned plug.

4. power supply unit according to claim 1 system is characterized in that, wherein above-mentioned first voltage output end be output+3V ,+5V ,+5V await orders power supply or+voltage of 12V.

5. power supply unit according to claim 1 system is characterized in that wherein above-mentioned plug can be 24 pin plugs, 4 pin plugs, video card pin plug or hard disk pin plug.

6. power supply unit according to claim 1 system is characterized in that wherein above-mentioned first on-off circuit, above-mentioned second switch circuit are arranged at Power conversion board.

7. power supply unit according to claim 1 system is characterized in that wherein above-mentioned first on-off circuit comprises:

Switch has the above-mentioned input end of above-mentioned first on-off circuit, the above-mentioned output terminal and the control end of above-mentioned first on-off circuit; And

Testing circuit has the above-mentioned input end that first test side is connected to above-mentioned first on-off circuit, is connected to the above-mentioned input end of above-mentioned first on-off circuit with second test side, and outputs control signals to above-mentioned control end;

Wherein, when the voltage of above-mentioned first test side during greater than the voltage of above-mentioned second test side, above-mentioned control signal is controlled above-mentioned switch and is reached connection; When the voltage of above-mentioned first test side was not more than the voltage of above-mentioned second test side, above-mentioned control signal was controlled above-mentioned switch and is reached and do not connect.

8. power supply unit according to claim 7 system is characterized in that wherein the voltage of above-mentioned control signal is greater than the voltage of above-mentioned first voltage output end.

9. the computing machine with parallel power supply system is characterized in that, comprises:

First power supply unit has first voltage output end;

The second source supply has second voltage output end;

First on-off circuit, the input end of above-mentioned first on-off circuit are connected to above-mentioned first voltage output end;

Second switch circuit, the input end of above-mentioned second switch circuit are connected to above-mentioned second voltage output end;

Plug has first pin and is connected to the output terminal of above-mentioned first on-off circuit and the output terminal of above-mentioned second switch circuit simultaneously; And

Mainboard has socket and can be connected above-mentioned first pin that first pin that makes on the above-mentioned socket is connected to above-mentioned plug with above-mentioned plug;

Wherein, above-mentioned first voltage output end and the identical voltage of above-mentioned second voltage output end output.

10. the computing machine with parallel power supply system according to claim 9, it is characterized in that, wherein above-mentioned plug comprises second pin that second pin is connected to above-mentioned socket in order to receiving the enabling signal that above-mentioned mainboard produces, and above-mentioned plug also is passed to above-mentioned first power supply unit and above-mentioned second source supply with above-mentioned enabling signal.

11. the computing machine with parallel power supply system according to claim 9, it is characterized in that, the aforementioned calculation machine also comprises logic gate, wherein above-mentioned logic gate has two input ends, connect above-mentioned first power supply unit and above-mentioned second source supply respectively, and have output terminal and connect the 3rd pin of above-mentioned plug and be passed to above-mentioned mainboard via the 3rd leg signal of above-mentioned socket.

12. the computing machine with parallel power supply system according to claim 9 is characterized in that, wherein above-mentioned first voltage output end be output+3V ,+5V ,+5V await orders power supply or+voltage of 12V.

13. the computing machine with parallel power supply system according to claim 9 is characterized in that, wherein above-mentioned plug can be 24 pin plugs, 4 pin plugs, video card pin plug or hard disk pin plug.

14. the computing machine with parallel power supply system according to claim 9 is characterized in that, wherein above-mentioned first on-off circuit, above-mentioned second switch circuit are arranged at Power conversion board.

15. the computing machine with parallel power supply system according to claim 9 is characterized in that, wherein above-mentioned first on-off circuit comprises:

Switch has the above-mentioned input end of above-mentioned first on-off circuit, the above-mentioned output terminal and the control end of above-mentioned first on-off circuit; And

Testing circuit has the above-mentioned input end that first test side is connected to above-mentioned first on-off circuit, is connected to the above-mentioned input end of above-mentioned first on-off circuit with second test side, and outputs control signals to above-mentioned control end;

Wherein, when the voltage of above-mentioned first test side during greater than the voltage of above-mentioned second test side, above-mentioned control signal is controlled above-mentioned switch and is reached connection; When the voltage of above-mentioned first test side was not more than the voltage of above-mentioned second test side, above-mentioned control signal was controlled above-mentioned switch and is reached and do not connect.

16. the computing machine with parallel power supply system according to claim 15 is characterized in that wherein the voltage of above-mentioned control signal is greater than the voltage of above-mentioned first voltage output end.

17. the power supply method of a power supply unit system, being applied to first power supply unit and second source supply provides first voltage to mainboard, it is characterized in that above-mentioned power supply method comprises the following step:

Detect above-mentioned first power supply unit and whether begin to set up above-mentioned first voltage;

When above-mentioned first voltage of above-mentioned first power supply unit began to set up, above-mentioned first voltage that above-mentioned first power supply unit is set up was connected to first pin;

Detect above-mentioned second source supply and whether begin to set up above-mentioned first voltage;

When above-mentioned first voltage of above-mentioned second source supply began to set up, above-mentioned first voltage that above-mentioned second source supply is set up was connected to above-mentioned first pin; And

Utilize above-mentioned first pin to provide above-mentioned first voltage to above-mentioned mainboard.

18. power supply method according to claim 17 is characterized in that, wherein above-mentioned first power supply unit and second source supply also can receive enabling signal and begin to set up above-mentioned first voltage.

19. power supply method according to claim 17 is characterized in that, wherein when above-mentioned first voltage of above-mentioned first power supply unit or above-mentioned second source supply arrived stable state, the out-put supply perfect signal was to above-mentioned mainboard.

Images