TWM639718U - Power supply, power supply circuit board and power module circuit board - Google Patents

Abstract

A power supply includes a power supply circuit board and a power module circuit board, the power supply circuit board includes a conversion circuit, a controller and a first connection port, and the power module circuit board includes a power module and a second connection port. The controller is used to control the conversion circuit to convert the DC voltage into the first output voltage, and the power module is plugged into the first connection port through the second connection port to electrically connect the conversion circuit, so that the power module converts the power provided by the circuit converted to the second output voltage.

Description

Power supply, power supply circuit board and power module circuit board

The invention relates to a power supply, a power supply circuit board and a power module circuit board, especially a power supply using a plug-in circuit board, a power supply circuit board and a plug-in power module circuit board.

With the development of science and technology, more and more electronic devices need power supplies to power them. Therefore, more and more attention is paid to the design and application of the power supply, especially in terms of the power density and design efficiency of the power supply, which are the focus of the power supply design. Please refer to FIG. 1 , which is a circuit block diagram of a conventional power supply. The conventional power supply 100 generally includes a conversion circuit, and the conversion circuit is used to convert the first output voltage Vo1 to supply power to the load 200 . Since the demand of the load 200 is more and more variable nowadays, and the demand for auxiliary power inside the power supply 100 is increasing rapidly, usually the power supply 100 needs to be equipped with an additional power module 30 to convert another set of second power supply with different voltage values. The output voltage Vo2 supplies power to the load 200 or the power supply 100 internally.

However, the requirements of each load 200 are different. Some loads 200 can operate without additional supply of the second output voltage Vo2, and some loads 200 must supply sufficient wattage in addition to the second output voltage Vo2. (For example, but not tied to different wattages such as 30W, 75W, etc.). Therefore, it is necessary to develop various power supplies 100 with different specifications to meet the different requirements of the load 200 . As a result, whenever the demand of the load 200 is different, it is necessary to additionally design a different power supply 100, or The situation that the load 200 does not need to supply the additional second output voltage Vo2 will result in a waste of the area used by the power supply 100 and the cost of the additional power module 30 .

Therefore, how to design a power supply, power supply circuit board, and power module circuit board to provide a compliant power supply adaptively in response to different load requirements, and to increase the power density of the power supply is the key to this case. It is a major topic of research that creators want to do.

In order to solve the above problems, the present invention provides a power supply using a plug-in circuit board to overcome the problems of the prior art. Therefore, the power supply of the present invention includes a power supply circuit board and a power module circuit board, the power supply circuit board includes a conversion circuit, a controller and a first connection port, and the conversion circuit is used for receiving DC voltage. The controller is used to control the conversion circuit to convert the DC voltage into a first output voltage, and the first connection port is electrically connected to the conversion circuit. The power module circuit board is plugged into the first connection port, and includes the power module and the second connection port. The power module is configured on the power module circuit board, and the second connection port is configured at one end of the power module circuit board. The second connecting port is electrically connected to the power module, and the second connecting port is used for inserting into the first connecting port. Wherein, the power supply module is electrically connected to the conversion circuit through the second connection port plugged into the first connection port, so that the power supply module converts the power provided by the conversion circuit into a second output voltage.

In order to solve the above problems, the present invention provides a power supply circuit board using a plug-in circuit board to overcome the problems of the prior art. Therefore, the power supply circuit board of the present invention includes a conversion circuit, a controller, a first output port and a first connection port. The conversion circuit includes a primary side circuit, a secondary side circuit and an isolation transformer. The primary side circuit is used to receive a DC voltage, and the isolation transformer electrically isolates the primary side circuit from the secondary side circuit. The controller is electrically connected to the conversion circuit, and the controller is used for controlling the conversion circuit to convert the DC voltage into the first output voltage. The first output port is electrically connected to the output end of the converting circuit, And used to provide the first output voltage. The first connection port is electrically connected to the conversion circuit. Wherein, the first connection port is used for inserting the modularized circuit board, so that the modularized circuit board receives the power provided by the conversion circuit.

In order to solve the above problems, the present invention provides a plug-in power supply module circuit board to overcome the problems of the prior art. Therefore, the power supply module circuit board of the present invention is inserted into the first connection port of the power supply circuit board, and the power supply circuit board is used for converting the DC voltage into the first output voltage. The power module circuit board includes a power module and a second connection port, and the power module is configured on the power module circuit board. The second connecting port is configured at one end of the power module circuit board and is electrically connected to the power module, and the second connecting port is used for inserting into the first connecting port. Wherein, the power supply module is electrically connected to the power supply circuit board through the second connection port plugged into the first connection port, so that the power supply module converts the power provided by the power supply circuit board into a second output voltage.

The main purpose and function of this creation is that in the power supply, since the power module circuit board is designed as an independent circuit board, it can adapt to provide a compliant power supply in response to different load requirements, and save Removing the space originally configured on the power supply circuit board improves space utilization, thereby reducing the area of the power supply system and improving the power density requirements.

In order to further understand the technology, means and effects of this creation to achieve the intended purpose, please refer to the following detailed description and drawings about this creation. For specific understanding, however, the attached drawings are only for reference and illustration, and are not used to limit the creation.

100: Power supply

2, 2': power supply circuit board

20: Conversion circuit

Q: Power switch

202: Primary side circuit

204: Secondary side circuit

206: Isolation transformer

206-1: Auxiliary winding

22: Controller

24: The first port

242: input pin

244: output pin

26: input port

28: output port

29: Power factor correction circuit

3, 3': power module circuit board

30: Power module

32:Second port

34: Second output port

200: load

Vin: input voltage

Vdc: DC voltage

Vo1: the first output voltage

Vo2: second output voltage

PWM: pulse width modulation signal

Sf: signal

Fig. 1 is a circuit block diagram of a conventional power supply; Fig. 2 is a circuit block diagram of a power supply using a plug-in circuit board in this invention; Fig. 3 A is the circuit block diagram of the first embodiment of the power supply circuit board applicable to the plug-in circuit board in this invention; Fig. 3B is the circuit block diagram of the second embodiment of the power supply circuit board applicable to the plug-in circuit board in this invention; FIG. 4A is a circuit block diagram of the first embodiment of the inventive power module circuit board; and FIG. 4B is a circuit block diagram of the second embodiment of the inventive power module circuit board.

The technical content and detailed description of this creation are described as follows with the drawings: Please refer to Figure 2, which is a circuit block diagram of a power supply using a plug-in circuit board for this creation. The power supply 100 includes a power supply circuit board 2 and a power module circuit board 3 , the power supply circuit board 2 includes a conversion circuit 20 , a controller 22 and a first connection port 24 , and the power module circuit board 3 includes a power module 30 with the second port 32. The conversion circuit 20 is configured on the power supply circuit board 2 and includes an input terminal and an output terminal. The input end is used for receiving the DC voltage Vdc, and the output end is used for providing the first output voltage Vo1. The conversion circuit 20 may be a switching conversion circuit (such as boost, buck, flyback and other conversion circuits), and includes a power switch Q. The controller 22 is configured on the power supply circuit board 2 and electrically connected to the conversion circuit 20 . Wherein, the controller 22 is mainly electrically connected to the power switch Q of the conversion circuit 20 , and controls the conversion circuit 20 to convert the DC voltage Vdc into the first output voltage Vo1 by controlling the on/off of the power switch Q. The first connection port 24 is configured on the power supply circuit board 2 and is electrically connected to the conversion circuit 20 . The power supply 100 is electrically connected to the load 200 and provides a first output voltage Vo1 to supply power to the load 200 .

The power module circuit board 3 is a plug-in circuit board, which mainly separates the auxiliary power supply circuit into an independent circuit board, and the power module circuit board 3 is plugged into the power supply circuit board 2, so that the power module The circuit board 3 provides the second output voltage Vo2. Specifically, the power module 30 is configured in the power module The circuit board 3 is used for providing the second output voltage Vo2 based on the DC voltage Vdc. The second connection port 32 is disposed at one end of the power module circuit board 3 and is electrically connected to the power module 30 . Wherein, the second connection port 32 is used for plugging into the first connection port 24, so as to electrically connect the power module 30 to the conversion circuit 20 in a plug-in manner, so that the power module 30 converts the power provided by the conversion circuit 20 is the second output voltage Vo2.

Further, the power supply 100 can be, for example but not limited to, an Ethernet network supply, and its characteristic is that the conversion circuit 20 usually converts the DC voltage Vdc to the first output voltage Vo1 of 54V. However, due to different models or different loads 200, in some practical applications, it is necessary to provide auxiliary power (such as but not limited to 12V) to supply the inside of the conversion circuit 20 (such as but not limited to, powering the controller 22, etc.) , used by the load 200 or an additional load (not shown in the figure), in addition to the first output voltage Vo1 of 54V, an additional auxiliary power supply of 12V is required. In this case, the power supply 100 must have the power module 30 to provide the second output voltage Vo2 based on the DC voltage Vdc. Preferably, the power module circuit board 3 can be designed to be vertically inserted into the power supply circuit board 2, which is less likely to block the configuration of various components and is more convenient in design.

On the other hand, since the power module circuit board 3 is an independent circuit board, multiple modules suitable for different wattage requirements can be designed. Under the premise of not changing the main circuit board, different power supply module circuit boards 3 can be replaced to meet the requirements of different maximum wattages required by different systems. In addition, the power module circuit board 3 is designed as an independent circuit board, so the space originally configured on the power supply circuit board 2 can be saved, the space utilization rate can be improved, the area of the power supply 100 can be reduced, and the requirement of high power density can be achieved. . The power module circuit board 3 is designed as an independent circuit board and has better circuit stability. Its circuit application is mature and stable, and it is less likely to have unexpected situations (such as but not limited to circuit failures, failures, etc.).

In addition, in addition to the above-mentioned special requirements, there are also some auxiliary power sources required inside the power supply 100 or the load 200 are not the same (such as but not limited to 9V, 15V, etc.), or do not need auxiliary power. Under such conditions, the power module circuit boards 3 that are usually applicable to each specification are also different. Likewise, the power module 30 is not even needed to provide the second output voltage Vo2 based on the DC voltage Vdc. If the plug-in type power module circuit board 3 is used, the appropriate power module circuit board 3 can be replaced (even without installation) in response to the needs of the power supply 100 or the load 200, and the overall power supply 100 The design is also more flexible and convenient, so that the design does not need to be repeated in design and wiring, and does not need to be re-developed to meet the needs of different projects, so the development time can be greatly shortened. In terms of circuit heat dissipation, since the power module circuit board 3 is designed as an independent circuit board, the heat generated by the power module circuit board 3 can be dissipated by the substrate of the power module circuit board 3 (i.e. PCB copper foil). Instead of the conventional power supply, the entire circuit only uses a single main circuit board for heat dissipation, resulting in poor heat dissipation and the need to install additional heat sinks.

Please refer to FIG. 3A , which is a circuit block diagram of the first embodiment of the power supply circuit board applicable to the plug-in circuit board in this invention, and refer to FIG. 2 for negative coordination. In addition to the conversion circuit 20 , the controller 22 and the first connection port 24 , the power supply circuit board 2 further includes an input port 26 , a first output port 28 and a power factor correction circuit 29 . The input port 26 is generally configured on one side of the power supply circuit board 2 and is used for receiving the AC input voltage Vin. The power factor correction circuit 29 is electrically connected to the input port 26 and the conversion circuit 20, and is used to convert the input voltage Vin into a DC voltage Vdc, and at the same time correct the power factor of the power supply 100 (usually can be increased to above 0.9) to provide high quality The DC voltage Vdc is supplied to the conversion circuit 20 . The first output port 28 can usually be configured on the other side of the power supply circuit board 2 , and is electrically connected to the output end of the conversion circuit 20 and the load 200 to provide the first output voltage Vo1 to supply power to the load 200 . The output end of the conversion circuit 20 provides the first output voltage Vo1 to the first output port 28 so as to provide the first output voltage Vo1 to the load 200 through the first output port 28 .

The conversion circuit 20 can preferably be an isolated conversion circuit, and the conversion circuit 20 includes a primary side circuit 202 , a secondary side circuit 204 and an isolation transformer 206 . The primary side circuit 202 and the secondary side circuit 204 are disposed on the power supply circuit board 2 , and the isolation transformer 206 electrically isolates the primary side circuit 202 and the secondary side circuit 204 . The input terminal of the conversion circuit 20 is electrically connected to the power factor correction circuit 29, so that the primary side The circuit 202 is electrically connected to the power factor correction circuit 29 to receive the DC voltage Vdc. The output end of the conversion circuit 20 is electrically connected to the first output port 28 , so that the secondary side circuit 204 is electrically connected to the first output port 28 to provide the first output voltage Vo1 . Wherein, the power factor correction circuit 29 can usually be configured between the input port 26 and the conversion circuit 20, the primary side circuit 202 can usually be configured between the isolation transformer 206 and the power factor correction circuit 29, and the secondary side circuit 204 can usually be configured Between the isolation transformer 206 and the first output port 28 . The controller 22 can be configured on the power supply circuit board 2 and electrically connected to the power switch Q of the converting circuit 20 . The controller 22 can provide a pulse width modulation signal PWM to the power switch Q based on the signal Sf fed back from the output terminal of the conversion circuit 20 (the feedback circuit may or may not be included between the output terminal and the controller 22), so as to control The power switch Q is turned on/off to control the conversion circuit 20 to convert the DC voltage Vdc into the first output voltage Vo1. The first connection port 24 is configured on the power supply circuit board 2 and is electrically connected to the conversion circuit 20 . The first connection port 24 is used for inserting the modular circuit board, so that the modular circuit board receives the power provided by the conversion circuit 20 .

Specifically, the first connection port 24 can usually be configured between the power factor correction circuit 29 and the first output port 28, or between the input port 26 and the first output port 28, and the first connection port 24 includes an input pin 242 . In this embodiment, it is assumed that the modular circuit board is a power module circuit board. The input pin 242 is electrically connected to the input terminal of the conversion circuit 20, and the power module 30 receives the DC voltage Vdc provided by the input terminal of the conversion circuit 20 through the input pin 242, so as to convert the DC voltage Vdc into a second output voltage. Vo2. On the other hand, the input pin 242 can also be electrically connected to the power factor correction circuit 29 (that is, electrically connected to any circuit node of the power factor correction circuit 29 or the input port 26), so that the power module 30 can pass through the input pin 242 receives the input voltage Vin or the power provided by the power factor correction circuit 29 , and converts it into a second output voltage Vo2 accordingly.

In this embodiment, the first connection port 24 further includes an output pin 244 . The output pin 244 is electrically connected to the first output port 28 , and the second connection port 32 is electrically connected to the first output port 28 through the output pin 244 by plugging into the first connection port 24 . In this way, the second output voltage Vo2 provided by the power module 30 can be It can be provided to the first output port 28 through the second connection port 32, so that the first output port 28 can provide the second output voltage Vo2 in addition to the first output voltage Vo1. On the other hand, it is assumed that the modular circuit board is a non-power module circuit board circuit board. The non-power supply module circuit board can be, for example but not limited to, a circuit board, and the circuit board is used to disconnect the path between the conversion circuit 20 and the first output port 28, so that the power supply 100 does not have the ability to provide the second output voltage Vo2. Function. It is worth mentioning that, in one embodiment of the present invention, when the power supply 100 does not have the function of providing the second output voltage Vo2, the first connection port 24 can also be disabled to provide additional auxiliary power through an empty connection. The function not only saves circuit space, but also reduces material cost and manufacturing cost.

Please refer to FIG. 3B , which is a circuit block diagram of the second embodiment of the power supply circuit board applicable to the plug-in circuit board in this invention, and refer to FIGS. 2-3A for the combination. The difference between the power supply circuit board 2' of this embodiment and the power supply circuit board 2 of FIG. 3A is that the power supply circuit board 2' does not have the power factor correction circuit 29 of FIG. 3A. The input voltage Vin received by the input port 26 is the DC voltage Vdc, and the converting circuit 20 receives the DC voltage Vdc through the input port 26 to convert the DC voltage Vdc into the first output voltage Vo1. On the other hand, the first connection port 24 is different from the embodiment shown in FIG. 3A , and is configured between the isolation transformer 206 and the first output port 28 . The input pin 242 of the first connection port 24 is electrically connected to the isolation transformer 206 so that the power module 30 can convert the power provided by the isolation transformer 206 into the second output voltage Vo2. Wherein, the power supply 100 may include an auxiliary winding 206-1. The auxiliary winding 206-1 is used to sense the power on the isolation transformer 206, so that the power module 30 can convert the power provided by the isolation transformer 206 into a second output voltage Vo2. The auxiliary winding 206-1 can generally be configured on the isolation transformer 206 to form an integrated transformer module.

In addition, the first connection port 24 may or may not include the output pin 244 , mainly depending on whether the power module circuit board 3 has the function of independently outputting the second output voltage Vo2. Specifically, the power module circuit board 3 may include a second output port. The second output port is configured at one end of the power module circuit board 3 and is electrically connected to the output end of the power module 30 to provide the second output voltage Vo2. Second output port It is used to electrically connect the load 200 or the additional load (not shown) inside the conversion circuit 20, so that the load 200 or the additional load (not shown) inside the conversion circuit 20 can receive the second output voltage through the second output port Vo2. Wherein, the location of the second output port and the second connection port 32 can be arranged at the same end or a different end, mainly depending on the configuration requirements of the power supply 100 circuit.

It is worth mentioning that in one embodiment of the present invention, the components and connections not mentioned in this embodiment are the same as those in FIG. 3A , and will not be repeated here. In addition, the features of FIG. 3A and FIG. 3B can be used alternately. For example, but not limited to, the power supply 100 including the power factor correction circuit 29 in FIG. 3A can be configured as an isolation transformer 206 with an auxiliary winding 206-1 in FIG. 3B, so that the power module circuit board 3 can pass through the auxiliary winding 206-1. 1. Receive the power of the isolation transformer 206 to convert it into the second output voltage Vo2, and the rest will not be repeated.

Please refer to FIG. 4A, which is the circuit block diagram of the first embodiment of the inventive power module circuit board, and FIG. 4B, which is the circuit block diagram of the second embodiment of the inventive power module circuit board. Refer to FIGS. 2-3B for complex cooperation. In FIG. 4A , the power module circuit board 3 is plugged into the first connection port 24 of the power supply circuit board 2 to provide additional auxiliary power. The power module circuit board 3 includes a power module 30 and a second connection port 32. The input and output ends of the power module 30 are electrically connected to the second connection port 32, and respectively pass through the input pins 242 of the first connection port 24. The power supply circuit board 2 is electrically connected to the output pin 244 . The power module 30 receives power through the input pin 242 and converts the power into a second output voltage Vo2 to provide the second output voltage Vo2 to the power supply circuit board 2 through the output pin 244 . Wherein, the power module 30 may be an isolated conversion circuit, including a primary side circuit, a transformer, a secondary side circuit and a controller (such as but not limited to Flyback, Forward, LLC converter, etc.), so as to control the primary side circuit through the controller And/or the secondary side circuit converts the power received by the input pin 242 into the second output voltage Vo2.

The difference between the power module circuit board 3' of FIG. 4B and the power module circuit board 3 of FIG. 4A is that the power module circuit board 3' includes a second output port 34, and the second output port 34 is configured on the power module circuit board. 3', and is electrically connected to the power module 30, so that the second output of the power module 30 The output voltage Vo2 can be provided to the circuit electrically connected to the rear end through the second output port 34 . Wherein, the location of the second output port 34 and the second connection port 32 can be arranged at the same end or a different end, mainly depending on the configuration requirements of the circuit of the power supply 100 . In addition, the power module 30 can be a non-isolated conversion circuit (such as but not limited to Buck, Boost converter, etc.), including a non-isolated conversion circuit and a controller, so that the controller controls the non-isolated conversion circuit to convert the input pin The received power at 242 is the second output voltage Vo2.

However, the above is only a detailed description and diagram of a preferred embodiment of this creation, but the characteristics of this creation are not limited to this, and are not used to limit this creation. The entire scope of this creation should be applied for as follows The scope of the patent shall prevail. All embodiments that conform to the spirit of the patent scope of this creation and its similar changes shall be included in the scope of this creation. Anyone who is familiar with this technology can easily think of it in the field of this creation. Changes or modifications can be covered by the scope of the following patents in this case.

100: Power supply

2: Power supply circuit board

20: Conversion circuit

Q: Power switch

22: Controller

24: The first port

3: Power module circuit board

30: Power module

32:Second port

200: load

Vdc: DC voltage

Vo1: the first output voltage

Vo2: second output voltage

Claims (19)

A power supply, comprising: a power supply circuit board, including: a conversion circuit for receiving a DC voltage; a controller for controlling the conversion circuit to convert the DC voltage into a first output voltage; and a first A connection port, electrically connected to the conversion circuit; and a power module circuit board, which is plugged into the first connection port, and includes: a power module, configured on the power module circuit board; and a second The connection port is configured at one end of the circuit board of the power supply module, and is electrically connected to the power supply module, and the second connection port is used for inserting into the first connection port; wherein, the power supply module is The connection port is plugged into the first connection port and electrically connected to the conversion circuit, so that the power module converts the power provided by the conversion circuit into a second output voltage. The power supply as described in Claim 1, further comprising: an input port for receiving an input voltage; a power factor correction circuit electrically connected to the input port and the conversion circuit, and for converting the input voltage is the DC voltage; and a first output port electrically connected to the output end of the conversion circuit and used for providing the first output voltage. The power supply as described in claim 2, wherein the second connection port is electrically connected to the first output port through an output pin of the first connection port, so that the first output port is further used to provide the second The output voltage. The power supply device as described in claim 2, wherein the power module circuit board further includes: a second output port configured at one end of the power module circuit board and electrically connected to the power module, the second The output port is used for providing the second output voltage. The power supply according to claim 2, wherein the conversion circuit is an isolated conversion circuit, and includes an isolation transformer electrically isolating a primary side circuit and a secondary side circuit of the conversion circuit. The power supply as described in claim 5, wherein the first connection port includes: an input pin electrically connected to the isolation transformer; wherein the power module is used to convert the power provided by the isolation transformer into the second output voltage. The power supply as described in claim 6, wherein the primary side circuit is configured between the isolation transformer and the input port, and the secondary side circuit and the first connection port are configured between the isolation transformer and the first output between ports. The power supply as described in claim 7, wherein the first connection port includes: an input pin electrically connected to the input end of the conversion circuit; wherein, the power module is used to connect the input end of the conversion circuit The received DC voltage is converted into the second output voltage. The power supply as described in Claim 8, wherein the primary side circuit is configured between the isolation transformer and the input port, the secondary side circuit is configured between the isolation transformer and the first output port, and the second A connection port is configured between the input port and the first output port. The power supply according to claim 1, wherein the power module circuit board is vertically inserted into the power supply circuit board. A power supply circuit board, comprising: A conversion circuit, including a primary side circuit, a secondary side circuit and an isolation transformer, the primary side circuit is used to receive a DC voltage, and the isolation transformer electrically isolates the primary side circuit from the secondary side circuit; a controller , electrically connected to the conversion circuit, and the controller is used to control the conversion circuit to convert the DC voltage into a first output voltage; a first output port, electrically connected to the output terminal of the conversion circuit, and used to provide the first An output voltage; and a first connection port electrically connected to the conversion circuit; wherein, the first connection port is used for plugging a modular circuit board so that the modular circuit board receives the conversion circuit provided electricity. The power supply circuit board as described in claim 11, further comprising: an input port for receiving an input voltage; a power factor correction circuit electrically connected to the input port and used for converting the input voltage into the DC voltage; and a first output port electrically connected to the output end of the conversion circuit and used to provide the first output voltage. The power supply circuit board as described in claim 12, wherein the modular circuit board is a power module circuit board, and the power module circuit board is used to convert the power provided by the conversion circuit into a second output Voltage. The power supply circuit board as described in claim 13, wherein the first connection port includes: an input pin electrically connected to the isolation transformer; Wherein, the power supply module is used to convert the power provided by the isolation transformer into the second output voltage; the primary side circuit is arranged between the isolation transformer and the input port, and the secondary side circuit and the first The connection port is configured between the isolation transformer and the first output port. The power supply circuit board as described in claim 13, wherein the first connection port includes: an input pin electrically connected to the input end of the conversion circuit; wherein, the power module is used for the input end of the conversion circuit The received DC voltage is converted into the second output voltage; the primary side circuit is configured between the isolation transformer and the input port, the secondary side circuit is configured between the isolation transformer and the first output port, and The first connection port is configured between the input port and the first output port. The power supply circuit board as described in claim 11, wherein the modularized circuit board is a circuit breaker, and the circuit breaker is used to disconnect the path between the conversion circuit and the first output port. A power module circuit board is plugged into a first connection port of a power supply circuit board, and the power supply circuit board is used to convert a DC voltage into a first output voltage. The power module circuit board includes: a power module configured on the power module circuit board; and a second connection port configured at one end of the power module circuit board and electrically connected to the power module, the second connection port is used for plugging In the first connection port; wherein, the power supply module is electrically connected to the power supply circuit board by plugging the second connection port into the first connection port, so that the power supply module is connected to the power supply circuit board The provided power is converted into a second output voltage. The power module circuit board as described in claim 17, wherein the second connection port is electrically connected to the power supply circuit board through an output pin of the first connection port, so that the power supply circuit board is further used to provide the power supply circuit board second output voltage. The power module circuit board as described in claim 17, wherein the power module circuit board further includes: a second output port, configured at one end of the power module circuit board, and electrically connected to the power module, the The second output port is used for providing the second output voltage.

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