Multi-output power supply and power distribution control method thereof

Abstract

The present invention provides a multi-output power supply and a power distribution control method thereof. The power supply of the present invention comprises a power conversion module and two switching modules. The two power output ends of the power conversion module selectively conduct or do not conduct two external output ports through the two switching modules. Therefore, the power supply can control which power output end supplies power to which power output port according to the required power of the two output ports and the rated power of the two power output ends, or combine the two power output ends for output; in this way, the two power output ends of the power conversion module can be optimized for different rated powers, increase the design range of the best conversion efficiency, and users do not need to select different output ports according to different rated powers, thereby achieving the purpose of improving the convenience of use.

Description

Technical Field

[0001] A power supply and a power distribution control method thereof, in particular to a multi-output power supply and a power distribution control method thereof. Background Art

[0002] In recent years, consumer electronic products have become more and more diversified and closer to daily life needs. Most users often carry more than one electronic product with them, and often include electronic products that require a larger output power, such as existing tablet computers or laptops, with a rated power requirement of 45W or more. Therefore, a power supply with multiple output ports, each of which can provide output power at the same time, and a single output port with a larger total output power is one of the main demand products.

[0003] See also Fig.10 As shown, in response to the above requirements, the existing multi-output power supply device includes a first AC / DC conversion unit A / D1, a second AC / DC conversion unit A / D2, a first switch SW1, a second switch SW2, a third switch SW3, a first output port O / P1 and a second output port O / P2. The first AC / DC conversion unit A / D1 and the second AC / DC conversion unit A / D2 both receive an AC input power source AC, and the first AC / DC conversion unit A / D1 has a first output terminal P1, and the second AC / DC conversion unit A / D2 has a second output terminal P2. The first switch SW1 is electrically connected between the first output terminal P1 and the first output port O / P1, the second switch SW2 is electrically connected between the second output terminal P2 and the second output port O / P2, and the third switch SW3 is electrically connected between the first output terminal P1 of the first AC / DC conversion unit A / D1 and the second output terminal P2 of the second AC / DC conversion unit A / D2.

[0004] When the first switch SW1 is turned on and the second switch SW2 and the third switch SW3 are open, the first AC / DC conversion unit A / D1 can output a first DC power to the first output port O / P1 through the first switch SW1; when the second switch SW2 is turned on and the first switch SW1 and SW3 are open, the second AC / DC conversion unit A / D2 can output a second DC power to the second output port O / P2 through the second switch SW2. When the third switch SW3 is turned on, the first switch SW1 can be controlled to be turned on and the second switch SW2 can be open, or the second switch SW2 can be controlled to be turned on and the first switch SW1 can be open, so as to connect the first AC / DC conversion unit A / D1 and the second AC / DC conversion unit A / D2 in parallel to the first output port O / P1 or the second output port O / P2. Therefore, when the first AC / DC conversion unit A / D1 and the second AC / DC conversion unit A / D2 are connected in parallel, their combined outputs can achieve a larger total output power. In order to facilitate the user to not deliberately select an output port during use, the first AC / DC conversion unit A / D1 and the second AC / DC conversion unit A / D2 are generally designed to have the same conversion power.

[0005] The following is an example of an application of the multi-output power supply device.

[0006] Assume that the rated conversion power of the first AC / DC conversion unit A / D1 and the second AC / DC conversion unit A / D2 is 45W, and the rated total output power (maximum output power) of the power supply device is 90W. When the first output port O / P1 and the second output port O / P2 are respectively connected to a power demanding device with a power demand of less than 45W, the first switch SW1 and the second switch SW2 are turned on, and the third switch SW3 is not turned on, and the first AC / DC conversion unit A / D1 and the second AC / DC conversion unit A / D2 respectively supply power to the first output port O / P1 and the second output port O / P2. However, when the first output port O / P1 is connected to a power demanding device with a power demand of 75W, the power supply device controls the first switch SW1 to be turned on, the second switch SW2 to be turned off, and the third switch SW3 to be turned off. In this way, the first output end P1 of the first AC / DC conversion unit A / D1 and the second output end P2 of the second AC / DC conversion unit A / D2 are both connected to the first output port O / P1 and power the first output port O / P1, so that the power supply of the first output port O / P1 is sufficient to provide the required power of 75W, while the second output port O / P2 is not powered at this time.

[0007] That is to say, the first output port O / P1 and the second output port O / P2 can only output power below 45W at the same time, or be combined into one of the output ports to output power above 45W and below 90W. For example, when the power demanding device is connected to the first output port O / P1 and its required power is 20W, it will receive the output power provided by the first AC / DC conversion unit A / D1; when the required power is 50W, it will receive the combined output power of the first AC / DC conversion unit A / D1 and the second voltage regulator. Since the second AC / DC conversion unit A / D2 is connected to the first output port O / P1 through the third switch SW3, the second output port O / P2 does not provide output power. However, at this time, the power supply device as a whole still has 40W of idle power, which is a waste.

[0008] In other words, each output port of the power supply can only output half or less of the total output power at the same time. When the required power of one output port is slightly higher than half of the total output power, the other output port cannot supply power, causing inconvenience in use and limitation and waste in conversion output design. Therefore, the prior art multi-output power supply device must be further improved. Summary of the invention

[0009] In view of the limitation of the power output switching design of the existing multi-output power supply device, which easily leads to poor power conversion efficiency and inconvenience in use, the present invention provides a multi-output power supply, comprising:

[0010] a first output port;

[0011] a second output port;

[0012] A power conversion module has a first power output terminal and a second power output terminal, wherein the first power output terminal outputs a first output power, and the second power output terminal outputs a second output power;

[0013] a first switching module electrically connected between the first power output terminal and the first output port and the second output port, and selectively conducting the first power output terminal to one of the first output port and the second output port, or selectively conducting or not conducting the first power output terminal to the first output port and the second output port;

[0014] A second switching module is electrically connected between the second power output terminal and the first output port and the second output port, and selectively conducts the second power output terminal to one of the first output port and the second output port, or selectively conducts or does not conduct the second output terminal to the first output port and the second output port.

[0015] The first switching module and the second switching module of the power supply of the present invention are respectively connected to the first power output end and the first output port and the second output port, and the second power output end and the first output port and the second output port. Through the first switching module and the second switching module, the first power output end of the power conversion module can selectively provide the first output power to the first output port or the second output port, and the second power output end can also selectively provide the second output power to the first output port or the second output port. Therefore, the first power output end and the second power output end can not only combine the output to one of the output ports at the same time to provide a higher output power, but also can output to any output port separately.

[0016] Since the first power output end and the second power output end can each output to any output port, even if the rated power of the first power output end and the second power output end of the power supply are different, for the user, the two output ports can be used in the same way, and there is no need to deliberately select an output port according to the required power of the power-consuming device.

[0017] The present invention also provides a method for controlling the power distribution of an output power supply, comprising the following steps:

[0018] When it is detected that the first output port has a first required power, determining whether the first required power is greater than a first rated power of the first power output end;

[0019] If yes, the first power output terminal is connected to the first output port but not to the second output port, and the second power output terminal is connected to the first output port but not to the second output port;

[0020] If not, further determining whether the first required power is greater than a second rated power of the second output end;

[0021] If the first required power is less than the first rated power and greater than the second rated power, the first power output terminal is connected to the first output port but not to the second output port, and the second power output terminal is not connected to the first output port and the second output port;

[0022] If the first required power is less than the second rated power, the first power output end is disconnected from the first output port and the second output port, and the second power output end is connected to the first output port but not to the second output port.

[0023] In the present method, since the first output power of the first power output end and the second output power of the second power output end can be arbitrarily allocated to the first or second output port, when one of the connection ports generates a first required power first, it can be determined based on the comparison between the first required power and the first rated power and the second rated power whether the first power output end, the second power output end or a combination of the two will provide power, so as to achieve the best output efficiency.

[0024] Furthermore, since the rated powers of the first power output terminal and the second power output terminal can be set to be different, they can be optimized according to their respective rated powers, and thus have better overall conversion efficiency in different usage scenarios. For example, the rated power of the first power output terminal is 60W, the rated power of the second power output terminal is 30W, and the total output power of the power supply is 90W. When the required power of one of the output ports is 20W, the output port will provide the second output power of the second power output terminal; when the required power of one of the output ports is 50W, the output port will provide the first output power of the first power output terminal, and the other output port can still provide 30W power supply to the second power output terminal of another power-demanding device; when the required power of one of the output ports is 75W, the output port will provide the combined output power of the first power output terminal and the second power output terminal.

[0025] As can be seen from the above description, the power conversion module in the power supply of the present invention can be optimally designed according to a plurality of different rated powers, thereby providing the power supply with better conversion efficiency in different usage scenarios; the user can also arbitrarily select an output port to connect a power-demanding device and obtain an output power with better efficiency, thereby improving the operational conversion efficiency of the power supply and enhancing the ease of use, thereby overcoming the problems of performance design and limited use of multi-output power supplies in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a circuit block diagram of a multi-output power supply of the present invention.

[0027] Figure 2 It is a circuit block diagram of a preferred embodiment of a multi-output power supply of the present invention.

[0028] Figure 3 It is a circuit block diagram of a preferred embodiment of a multi-output power supply of the present invention.

[0029] Figure 4 It is a circuit block diagram of a preferred embodiment of a multi-output power supply of the present invention.

[0030] Figure 5It is a circuit block diagram of a preferred embodiment of a multi-output power supply of the present invention.

[0031] Figure 6 and Figure 7 It is a flow chart of the power distribution control method of the present invention.

[0032] Figure 8 It is a circuit block diagram of a preferred embodiment of a multi-output power supply of the present invention.

[0033] Fig. 9 It is a circuit block diagram of a preferred embodiment of a multi-output power supply of the present invention.

[0034] Fig.10 It is a circuit block diagram of a conventional multi-output power supply. DETAILED DESCRIPTION

[0035] See also Figure 1 As shown, the multi-output power supply of the present invention comprises a first output port O / P1, a second output port O / P2, a power conversion module 10, a first switching module 20 and a second switching module 30. The power conversion module 10 has a first power output terminal N1 and a second power output terminal N2, and the power conversion module 10 converts an alternating current input power AC and generates a first output power and a second output power, the first output power is output from the first power output terminal N1, and the second output power is output from the second power output terminal N2, and the rated power of the first power output terminal N1 and the second power output terminal N2 are preferably different. An input end of the first switching module 20 is electrically connected to the first power output end N1, and two output ends of the first switching module 20 are electrically connected to the first output port O / P1 and the second output port O / P2, respectively. The first switching module 20 selectively conducts the first power output end N1 to one of the first output port O / P1 and the second output port O / P2, or selectively conducts or does not conduct the first power output end N1 to the first output port O / P1 and the second output port O / P2. An input terminal of the second switching module 30 is electrically connected to the first power output terminal N1, and two output terminals of the second switching module 30 are electrically connected to the first output port O / P1 and the second output port O / P2 respectively, and the second switching module 30 selectively conducts the second output terminal N2 to one of the first output port O / P1 and the second output port O / P2, or selectively conducts or does not conduct the second output terminal N2 to the first output port O / P1 and the second output port O / P2.

[0036] Preferably, the first switching module 20 and the second switching module 30 are configured to respectively set a controllable electronic switching switch between the first power output terminal N1, the second power output terminal N2 and the first output port O / P1, the second output port O / P2, so as to achieve the purpose of selectively conducting or non-conducting between the first power output terminal N1 and the first output port O / P1, the second output port O / P2, and between the second power output terminal N2 and the first output port O / P1, the second output port O / P2.

[0037] See also Figure 2 As shown, in more detail, the first switching module 20 includes a first switch SW1 and a second switch SW2, and the second switching module 30 includes a third switch SW3 and a fourth switch SW4. The first switch SW1 is electrically connected between the first power output terminal N1 and the first output port O / P1, the second switch SW2 is electrically connected between the first power output terminal N1 and the second output port O / P2, the third switch SW3 is electrically connected between the second power output terminal N2 and the first output port O / P1, and the fourth switch SW4 is electrically connected between the second power output terminal N2 and the second output port O / P2. The first to fourth switches SW4 can be controlled to be conductive or non-conductive (i.e., open circuit) respectively, so as to control the first power output terminal N1 and the second power output terminal N2 to provide output power to the first output port O / P1 or the second output port O / P2 respectively.

[0038] Please refer to the following table (Table 1), by controlling the conductive and non-conductive (open) states of the first to fourth switches SW1-SW4, respectively, the first output power P1 and the second output power P2 are controlled to be distributed to the first output port O / P1 and the second output port O / P2. The "O" in the columns of the first to fourth switches SW1-SW4 indicates conductive, and the "X" indicates non-conductive, and the "P1" in the columns of the first output port O / P1 and the second output port O / P2 indicates providing the first output power, "P2" indicates providing the second output power, "P1+P2" indicates the combined output of the first and second output powers, and NO indicates that no output power is provided.

[0039] SW1 SW2 SW3 SW4 O / P1 O / P2 X X X X NO NO O X X X P1 NO X O X X NO P1 X X O X P2 NO O O X X P1 P1 X X O O P2 P2 O X X O P1 P2 X O O X P2 P1 O X O X P1+P2 NO X O X O NO P1+P2

[0040] Table 1

[0041] See also Figure 3As shown, preferably, the power supply further includes a control module 40, and the control module 40 is electrically connected to the first output port O / P1, the second output port O / P2, the first switching module 20, and the second switching module 30. The control module 40 detects a first required power of the first output port O / P1 and a second required power of the second output port O / P2, and controls the first switching module 20 to selectively conduct the first power output terminal N1 to one of the first output port O / P1 and the second output port O / P2, or both of the first output port O / P1 and the second output port O / P2, according to the first required power and the second required power, and controls the second switching module 30 to selectively conduct the second power output terminal N2 to one of the first output port O / P1 and the second output port O / P2, or both of the first output port O / P1 and the second output port O / P2. The control module 40 preferably communicates with a first power demand device connected to the first output port O / P1 through a power delivery protocol (PD Protocol) to detect the first required power, and can also communicate with a second power demand device connected to the second output port O / P2 through the power delivery protocol to detect the first required power. The control module 40 can achieve the above control purpose by controlling the first to fourth switches SW4. In one embodiment of the present invention, the control module 40 can be a control chip.

[0042] As can be seen from the above table (Table 1), there are at least the following ways for the first output power P1 and the second output power P2 to be distributed to the first output port O / P1 and the second output port O / P2: the first output power P1 is provided to the first output port O / P1 and the second output power P2 is provided to the second output port O / P2, the first output power P1 is provided to the second output port O / P2 and the second output power P2 is provided to the first output port O / P1, the first output power P1 and the second output power P2 are both provided to the first output port O / P1, or the first output power P1 and the second output power P2 are both provided to the second output port O / P2, etc.

[0043] See also Figure 4As shown, in one embodiment, the power conversion module 10 includes an AC / DC conversion unit 11, a first DC transformer unit 12, and a second DC transformer unit 13. The AC / DC conversion unit 11 receives an AC input power source AC and converts the AC input power source AC into a DC power source. The first DC transformer unit 12 is electrically connected to the AC / DC conversion unit 11 to receive the DC power source and converts the DC power source into the first output power source P1 to be output from the first power output terminal N1. The second DC transformer unit 13 is electrically connected to the AC / DC conversion unit 11 to receive the DC power source and converts the DC power source into the second output power source P2 to be output from the second power output terminal N2.

[0044] Please read further Figure 5 As shown, preferably, the AC-DC conversion unit 11 includes a flyback converter, the first DC conversion unit 12 includes a first buck converter 121 and a first controller 122 , and the second DC conversion unit 13 includes a second buck converter 131 and a second controller 132 .

[0045] After the AC / DC conversion unit 11 of the power conversion module 10 converts the AC output power AC into a DC power, the first DC transformer unit 12 and the second DC transformer unit 13 respectively convert the DC power into a first output power P1 and a second output power P2, and then the first switching module 20 and the second switching module 30 distribute the first and second output power P1, P2 to the first and / or second output ports O / P1, O / P2. In this way, it is not necessary to set up an AC / DC conversion unit for each output port, thereby reducing the space added by the isolation converter, and the first DC transformer unit 12 and the second DC transformer unit 13 can be optimized according to the first rated power of the first power output terminal N1 and the second rated power of the second power output terminal N2, respectively, to provide better conversion efficiency, and provide a wider range of high conversion efficiency power as a whole. In this embodiment, the first rated power of the first power output terminal N1 is the optimal conversion power of the first DC transformer unit 12 , and the second rated power of the second power output terminal N2 is the optimal conversion power of the second DC transformer unit 13 .

[0046] In the present embodiment, the control module 40 includes a first controller 122 of the first DC voltage conversion unit 12 and a second controller 132 of the second DC voltage unit 13. The first controller 122 is electrically connected to the first output port O / P1 to detect the first required power of the first output port O / P1, and is electrically connected to the first switching module 20. The second controller 132 is electrically connected to the second output port O / P2 to detect the second required power of the second output port O / P2, and is electrically connected to the second switching module 30. The first controller 122 and the second controller 132 are electrically connected to each other to communicate and exchange the first required power and the second required power. In this way, the first controller 122 and the second controller 132 are both aware of the first required power and the second required power, and control the first switching module 20 and the second switching module 30 respectively accordingly.

[0047] The control module 40 in this embodiment includes a first controller 122 of the first DC transformer unit 12 and a second controller 132 of the second DC voltage unit 12, and the first and second controllers 122, 132 communicate directly with each other to collaboratively obtain the first required power and the second required power. In this way, there is no need to set up an additional processor as the control module 40 to control the first and second switching modules 20, 30.

[0048] Preferably, the first rated power of the first power output terminal N1 is different from the second rated power of the second DC transformer unit 13. That is to say, the first DC transformer unit 12 and the second DC transformer unit 13 are optimized according to two output powers, respectively, so that the power supply has a wider optimization design range. That is to say, when the power demand device is connected to one of the output ports, so that the output port has a required power, the first switching module 20 and the second switching module 30 can select an output power with a rated power higher than and closer to the required power to provide to one of the output ports. The following description will be based on the premise that the first rated power is greater than the second rated power, and the first output port O / P1 is first connected to the first power demand device and has a first required power. It should be noted that when the second output port O / P2 first has a second required power, the logic of "selecting an output power with a rated power higher than and closer to the required power to provide to the output port" is also used to judge and provide the output power to the second output port, and the present invention will not be repeated here.

[0049] In a preferred embodiment, when the control module 40 detects that the first output port O / P1 has a first required power, the control module 40 determines whether the first required power is greater than the first rated power. If so, the control module 40 controls the first switching module 20R to connect the first power output terminal N1 to the first output port O / P1, and controls the second switching module 30 to connect the second power output terminal N2 to the first output port O / P1; if not, the control module 40 further determines whether the first required power is greater than the second rated power; if the first required power is less than the first rated power and greater than the second rated power, the control module 40 controls the first switching module 20R to connect the first power output terminal N1 to the first output port O / P1, and controls the second switching module 30 to connect the second power output terminal N2 to the first output port O / P1. The second power output terminal N2 is not connected to the first output port O / P1 and the second output port O / P1, that is, the first required power is provided by the first output power of the first power output terminal N1; if the first required power is less than the second rated power, the control module 40 controls the first switching module 20 to connect the first power output terminal N1 to the first output port O / P1 and the second output port O / P2, and controls the second switching module 30 to connect the second power output terminal N2 to the first output port O / P1, that is, the first required power is provided by the second output power of the second power output terminal.

[0050] Please also read Figure 6 As shown, in summary, the power allocation control method of the present invention comprises the following steps:

[0051] When it is detected that the first output port O / P1 has a first required power (S101), it is determined whether the first required power is greater than the first rated power (S102);

[0052] If yes, the first power output terminal N1 is connected to the first output port O / P1 but not to the second output port O / P2, and the second power output terminal N2 is connected to the first output port O / P1 but not to the second output port O / P2 (S103);

[0053] If not, further determining whether the first required power is greater than the second rated power of the second output end (S104);

[0054] If the first required power is less than the first rated power and greater than the second rated power, the first power output terminal N1 is connected to the first output port O / P1 but not to the second output port O / P2, and the second power output terminal N2 is not connected to the first output port O / P1 and the second output port O / P2 (S105);

[0055] If the first required power is less than the second rated power, the first power output end N1 is disconnected from the first output port O / P1 and the second output port O / P2, and the second power output end N2 is connected to the first output port O / P1 but not to the second output port O / P2 (S106).

[0056] It is assumed below that the first rated power of the first power output terminal N1 is 60W, and the first rated power of the second power output terminal N2 is 30W.

[0057] In the first use scenario, when a required power of the first output port O / P1 is less than the second rated power, for example, 20W, the power supply has three feasible power distribution modes: the first is to connect the first power output terminal N1 to the first output port O / P1, the second is to connect the second power output terminal N2 to the first output port O / P1, and the third is to connect both the first power output terminal N1 and the second power output terminal N2 to the first output port O / P1. According to the common knowledge of buck conversion efficiency, since the second rated power (30W) of the second power output terminal N2 is closest to the first required power (20W), the power supplied by the second output power P2 has the best power supply calibration rate. Therefore, the control module 40 controls the second switching module 30 to connect the second power output terminal N2 to the first output port O / P1, while the first power output terminal N1 is not connected to the first output port O / P1 or the second output port O / P2.

[0058] In the second usage scenario, when the first required power of the first output port O / P1 is between the first rated power and the second rated power, for example, 50W, the power supply has two feasible power allocation methods: the first is to connect both the first power output terminal N1 and the second power output terminal N2 to the first output port O / P1, and the second is to only connect the first power output terminal N1 to the first output port O / P1, and the second power output terminal N2 is not connected to the first output port O / P1. Since the first rated power of the first power output terminal N1 is sufficient to bear the required power, providing the second output power P2 of the second power output terminal N2 to the first output port O / P1 at the same time will result in power waste, so the second method is the preferred method. Therefore, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 to the first output port O / P1, and the second switching module 30 controls the second power output terminal N2 to not conduct to the first output port O / P1 and the second output port O / P2, so as to provide the first output power P1 of the first power output terminal N1 to the power-demanding device of the second output port O / P2.

[0059] In this way, when the second output port O / P2 is additionally connected to another power-demanding device, the control module 40 controls the second switching module 30 to switch on the second power output terminal N2 and the second output port O / P2, while the second power output terminal N2 and the first output port O / P1 remain disconnected, so as to provide the second output power P2 of the second power output terminal N2 to the second output port O / P2.

[0060] Due to the first switching module 20 and the second switching module 30 of the power supply of the present invention, the output power of the first power output terminal N1 and the second power output terminal N2 can be flexibly allocated. Even when the power demand of the power-demanding device connected to one of the output ports is greater than half of the total rated power of the power supply, as long as the demand power is still less than the larger rated power of the first and second power output terminals N2, the control module 40 only needs to switch the output power sufficient to provide the demand power to any one of the output ports to provide sufficient power. At this time, the output power of the other power output terminal is still idle and can be used to supply power when another power-demanding device is connected to the other output port.

[0061] In the third usage scenario, when the required power of the first output port O / P1 is greater than the first rated power, for example, 75W, in order to provide sufficient output power, the control module 40 controls the first switching module 20 and the second switching module 30 to turn on both the first power output terminal N1 and the second power output terminal N2 to the first output port O / P1, so that the first output power P1 and the second output power P2 of the first power output terminal N1 and the second power output terminal N2 are combined and output to the first output port O / P1.

[0062] Further, when the first output port O / P1 has a first required power first, and the second output port O / P2 has a second required power, the control module 40 determines whether the first required power is greater than the second rated power. If so, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 and the first output port O / P1, and controls the second switching module 30 to conduct the second power output terminal N2 and the second output port O / P2; if not, the control module 40 controls the first switching module 20 to conduct the first power output terminal N1 and the second output port O / P2, and controls the second switching module 30 to conduct the second power output terminal N2 and the first output port O / P1.

[0063] See also Figure 7 That is to say, the control method of the present invention further comprises the following steps:

[0064] When it is further detected that the second output port O / P2 has a second required power (S201), it is determined whether the first required power is greater than the second rated power (S202);

[0065] If yes, the first power output terminal N1 is connected to the first output port O / P1 but not to the second output port O / P2, and the second power output terminal N2 is connected to the second output port O / P2 but not to the first output port O / P1 (S203);

[0066] If not, the first power output terminal N1 is connected to the second output port O / P2 but not to the first output port O / P1, and the second power output terminal N2 is connected to the first output port O / P1 but not to the second output port O / P2 (S204).

[0067] In this embodiment, when the first output port O / P1 is first connected to a power demanding device and has the first power demand, and then the second output port O / P2 is connected to another power demanding device and has the second power demand, the control module 40 simply compares the first and second power demand and the rated powers of the first and second power output terminals N1 and N2. Only when the first power demand is less than the smaller second rated power, the control module 40 controls the second switching module 30 to conduct the second power output terminal N2 and the first output port O / P1, and provide the second output power P2 to the first output port O / P1, so as to avoid the first output power P1 with a higher rated power supplying the lower first power demand and causing poor efficiency. In other cases, the first output power P1 is provided to the first output port O / P1, and the second output power P2 is provided to the second output port O / P2.

[0068] See also Figure 8As shown, in another preferred embodiment of the present invention, the power supply further includes a first basic power supply unit 61 and a second basic power supply unit 62. The first basic power supply unit 61 is electrically connected between the first power output terminal N1 and the first output port O / P1, and the second basic power supply unit 62 is electrically connected between the first power output terminal N1 and the first output port O / P1. When the first switching module 20 conducts the first power output terminal N1 to the second output port O / P2 but not to the first output port O / P1, and the second switching module 30 conducts the second power output terminal N2 to the second output port O / P2 but not to the first output port O / P1, the first basic power supply providing unit 61 receives the first output power P1, converts the first output power P1 into a basic output power, and provides it to the first output port O / P1; when the first switching module 20 conducts the first power output terminal N1 to the first output port O / P1 but not to the second output port O / P2, and the second switching module 30 conducts the second power output terminal N2 to the first output port O / P1 but not to the second output port O / P2, the second basic power supply providing unit 62 receives the second output power P2, converts the second output power P2 into a basic output power, and provides it to the first output port O / P1.

[0069] In the present embodiment, when the power demand of one of the output ports is higher than the higher first rated power, and the first switching module 20 and the second switching module 30 turn on both the first power output terminal N1 and the second power output terminal N2 to supply the required power, the first basic power supply unit 61 and the second basic power supply unit 62 are used to convert the first output power P1 or the second output power P2 into a lower basic output power, such as a 5V / 1A basic output power, and provide it to the other output port, so that the other output port can also have a basic output power, avoiding that the other output port is completely unable to supply power. That is to say, in the present embodiment, when one of the output ports has a power demand higher than the first rated power, so that the first and second output powers P1 and P2 are both provided to the output port, even when the other output port is connected to another power-demanding device, there is no need to readjust the switching state of the first switching module 20 and the second switching module 30, and the first basic power supply unit 61 or the second basic power supply unit 62 provides another basic output power to the other output port.

[0070] See also Fig. 9As shown, in a third preferred embodiment of the present invention, the power supply further includes a third output port O / P3 and a third switching module 40, and the power conversion module 10 further includes a third power output terminal N3, and a third output power P3 is outputted from the third power output terminal. The third switching module 40 is electrically connected between the third power output terminal N3 and the first output port O / P1, the second output port O / P2, and the third output port O / P3, and selectively conducts the third power output terminal N3 to one or two of the first output port O / P1, the second output port O / P2, and the third output port O / P3, or selectively conducts or does not conduct the third power output terminal N3 to the first output port O / P1, the second output port O / P2, and the third output port O / P3. The first switching module 20 is also electrically connected between the first power output terminal N1 and the third output port O / P3, and selectively conducts or does not conduct the first power output terminal N1 to the third output port O / P3, and the second switching module 30 is also electrically connected between the second power output terminal N2 and the third output port O / P3, and selectively conducts or does not conduct the second power output terminal N2 to the third output port O / P3.

[0071] When the power supply has three sets of output ports, the power conversion module 10 further includes a third power output terminal N3, and the first switching module 20, the second switching module 30 and the third switching module 40 respectively include three switches, which are respectively electrically connected between the first to third power output terminals N3 and the first to third output ports O / P3, so as to respectively control the conduction or non-conduction between each of the power output terminals and each of the output ports.

[0072] In addition, the power conversion module 10 includes the AC-DC conversion unit 11 and a DC transformer unit corresponding to each power output terminal. For example, in a preferred embodiment of the present invention, it further includes a third DC transformer unit 14. Preferably, the third DC transformer unit 14 includes a buck converter and a controller. The power converter topology structure based on the present invention enables the power conversion module 10 to be flexibly expanded in design according to the number of power output terminals and output power requirements. The advantage is that each buck converter can be optimized according to the different rated power of each power output terminal, and there is no need to add an additional isolated AC-DC conversion, which saves space utilization and optimizes the overall power conversion efficiency under a variety of different usage scenarios.

[0073] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multi-output power supply, It is characterized in that Include: a first output port; a second output port; A power conversion module has a first power output terminal and a second power output terminal, wherein the first power output terminal outputs a first output power, and the second power output terminal outputs a second output power; a first switching module electrically connected between the first power output terminal and the first output port and the second output port, and selectively conducting the first power output terminal to one of the first output port and the second output port, or selectively conducting or not conducting the first power output terminal to the first output port and the second output port; a second switching module electrically connected between the second power output terminal and the first output port and the second output port, and selectively conducting the second power output terminal to one of the first output port and the second output port, or selectively conducting or not conducting the second output terminal to the first output port and the second output port; A control module is electrically connected to the first output port, the second output port, the first switching module, and the second switching module; wherein, The control module detects a first required power of the first output port and a second required power of the second output port, and controls the first switching module and the second switching module according to the first required power and the second required power.

2. The multi-output power supply as claimed in claim 1, It is characterized in that The power conversion module includes: An AC-DC conversion unit receives an AC input power source and converts the AC input power source into a DC power source; a first DC transformer unit, electrically connected to the AC / DC converter unit to receive the DC power supply, and convert the DC power supply into the first output power supply to be outputted from the first power supply output terminal; A second DC transformer unit is electrically connected to the AC / DC converter unit to receive the DC power supply and convert the DC power supply into the second output power supply to be outputted from the second power supply output terminal.

3. The multi-output power supply as claimed in claim 2, It is characterized in that The first DC conversion unit includes a first buck converter and a first controller, the second DC conversion unit includes a second buck converter and a second controller, and the control module includes the first controller and the second controller; wherein, The first controller is electrically connected to the first output port to detect the first required power of the first output port, and is electrically connected to the first switching module to control the first switching module; The second controller is electrically connected to the second output port to detect the second required power of the second output port, and is electrically connected to the second switching module to control the second switching module; and The first controller and the second controller are electrically connected to each other to communicate the first required power and the second required power, and the first controller controls the first switching module according to the first required power and the second required power, and the second controller controls the second switching module according to the first required power and the second required power.

4. The multi-output power supply as claimed in claim 1, It is characterized in that The first switching module includes: a first switch electrically connected between the first power output terminal and the first output port; a second switch electrically connected between the first power output terminal and the second output port; The second switching module includes: a third switch electrically connected between the second power output terminal and the first output port; A fourth switch is electrically connected between the second power output terminal and the second output port.

5. The multi-output power supply as claimed in claim 1, It is characterized in that Further including: a first basic power supply unit, electrically connected between the first power output terminal and the first output port; wherein, when the first switching module conducts the first power output terminal to the second output port but not to the first output port, and the second switching module conducts the second power output terminal to the second output port but not to the first output port, the first basic power supply unit receives the first output power, converts the first output power into a basic output power and provides it to the first output port; A second basic power supply unit is electrically connected between the second power output terminal and the second output port; wherein, when the first switching module conducts the first power output terminal to the first output port but not to the second output port, and the second switching module conducts the second power output terminal to the first output port but not to the second output port, the second basic power supply unit receives the second output power, converts the second output power into the basic output power and provides it to the first output port.

6. The multi-output power supply according to any one of claims 1 to 3, It is characterized in that The first power output terminal has a first rated power, the second power output terminal has a second rated power, and the first rated power is greater than the second rated power; When the control module detects that the first output port has the first required power, the control module determines whether the first required power is greater than the first rated power; If yes, the control module controls the first switching module to connect the first power output terminal to the first output port but not to the second output port, and controls the second switching module to connect the second power output terminal to the first output port but not to the second output port; If not, the control module further determines whether the first required power is greater than the second rated power; If the first required power is less than the first rated power and greater than the second rated power, the control module controls the first switching module to connect the first power output end to the first output port but not to the second output port, and controls the second switching module to connect the second power output end to neither the first output port nor the second output port; If the first required power is less than the second rated power, the control module controls the first switching module to disconnect the first power output terminal from the first output port and the second output port, and controls the second switching module to connect the second power output terminal to the first output port but not to the second output port.

7. The multi-output power supply as claimed in claim 6, It is characterized in that When the control module detects that the first output port has the first required power and the second output port has the second required power, the control module determines whether the first required power is greater than the second rated power; If yes, the control module controls the first switching module to connect the first power output terminal to the first output port, and controls the second switching module to connect the second power output terminal to the second output port but not to the first output port; If not, the control module controls the first switching module to connect the first power output terminal to the second output port but not to the first output port, and controls the second switching module to connect the second power output terminal to the first output port but not to the second output port.

8. The multi-output power supply as claimed in claim 1, It is characterized in that Further including: a third output port; A third switching module; wherein, The power conversion module further includes a third power output terminal; wherein the third switching module is electrically connected between the third power output terminal and the first output port, the second output port, and the third output port of the third power output terminal, and selectively conducts the third power output terminal to one or two of the first output port, the second output port, and the third output port, or selectively conducts or does not conduct the third power output terminal to the first output port, the second output port, and the third output port; The first switching module is also electrically connected between the first power output terminal and the third output port, and selectively conducts or does not conduct the first power output terminal to the third output port; the second switching module is also electrically connected between the second power output terminal and the third output port, and selectively conducts or does not conduct the second power output terminal to the third output port.

9. A power distribution control method for a multi-output power supply, It is characterized in that The multi-output power supply according to claim 1 is performed: When it is detected that the first output port has a first required power, determining whether the first required power is greater than a first rated power of the first power output end; If yes, the first power output terminal is connected to the first output port but not to the second output port, and the second power output terminal is connected to the first output port but not to the second output port; If not, further determining whether the first required power is greater than a second rated power of the second output end; If the first required power is less than the first rated power and greater than the second rated power, the first power output terminal is connected to the first output port but not to the second output port, and the second power output terminal is not connected to the first output port and the second output port; If the first required power is less than the second rated power, the first power output end is disconnected from the first output port and the second output port, and the second power output end is connected to the first output port but not to the second output port.

10. The power distribution control method of a multi-output power supply as claimed in claim 9, It is characterized in that When it is further detected that the second output port has a second required power, determining whether the first required power is greater than the second rated power; If yes, the first power output terminal is connected to the first output port but not to the second output port, and the second power output terminal is connected to the second output port but not to the first output port; If not, the first power output terminal is connected to the second output port but not to the first output port, and the second power output terminal is connected to the first output port but not to the second output port.

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