CN220775661U

CN220775661U - Power supply device of USB charging interface of main board and electronic equipment

Info

Publication number: CN220775661U
Application number: CN202322492058.XU
Authority: CN
Inventors: 王亮
Original assignee: Lenovo Kaitian Technology Co Ltd
Current assignee: Lenovo Kaitian Technology Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-04-12
Anticipated expiration: 2033-09-13

Abstract

The application provides a power supply unit and electronic equipment of USB interface that charges of mainboard, wherein the mainboard includes: the power supply device comprises a first DC/DC converter, a power switch, a first device, a second DC/DC converter and a second device, wherein the first DC/DC converter, the power switch and the first device are sequentially connected; the second DC/DC converter is connected with a second device; the power supply device includes: a MOS tube switch and a power management chip; the MOS tube switch is respectively connected with the first DC/DC converter and the power switch, and the power management chip is connected with the MOS tube switch, the second DC/DC converter and the USB charging interface; the power management chip is configured to control the MOS tube switch to be switched off when the main board is detected to be powered off, and simultaneously control the second DC/DC converter to be switched off. Through the power supply device, the USB charging interface can provide normal charging under the condition that the main board bios sets the EUP option and the main board is in a power-off state.

Description

Power supply device of USB charging interface of main board and electronic equipment

Technical Field

The application relates to the technical field of motherboard power supply, in particular to a power supply device of a USB charging interface of a motherboard and electronic equipment.

Background

At present, the power consumption of a computer main board is generally less than 1W, which can be achieved by setting an energy use product (Energy Using Product, EUP) specification on the main board, namely, opening an EUP option on a main board bios.

When the USB charging interface is arranged on the main board and the EUP is started on the main board, the USB charging interface is powered off after the PC is powered off, and a user cannot use the USB charging interface to charge equipment. If the user wants to still charge the device through the USB charging interface after the PC is powered off, the EUP option of the bios needs to be turned off in advance, and after the device is charged, the EUP option of the bios needs to be turned on again, so that the operation is complex.

Disclosure of Invention

In view of this, the present application provides a power supply device and an electronic device for a USB charging interface of a motherboard, where the power supply device is disposed on the motherboard, so that after a host bios opens an EUP option and a PC is turned off, a user can use the USB charging interface of the motherboard to charge the device, without performing an operation of closing the EUP option of the bios.

In a first aspect, an embodiment of the present application provides a power supply device for a USB charging interface of a motherboard, where the motherboard includes: the power supply device comprises a first DC/DC converter, a power switch, a first device, a second DC/DC converter and a second device, wherein the first DC/DC converter, the power switch and the first device are sequentially connected; the second DC/DC converter is connected with a second device; the power supply device includes: a MOS tube switch and a power management chip; the MOS tube switch is respectively connected with the first DC/DC converter and the power switch, and the power management chip is connected with the MOS tube switch, the second DC/DC converter and the USB charging interface; the power management chip is configured to control the MOS tube switch to be switched off and control the second DC/DC converter to be switched off when the main board is detected to be powered off.

In one possible implementation, the power management chip is connected to the control end of the MOS transistor switch and the enable end of the second DC/DC converter through an H/L voltage control signal line, respectively.

In one possible implementation, the MOS transistor switch is an N-type MOS transistor switch.

In one possible implementation, the power supply device further includes: a current sensing resistor and a current monitoring chip; the current sensing resistor is respectively connected with the first DC/DC converter, the USB charging interface and the current monitoring chip, the current monitoring chip is connected with the power management chip, and the current monitoring chip is configured to acquire the current value of the USB charging interface through the current sensing resistor and send the current value to the power management chip.

In one possible implementation, the power management chip is further configured to shut down the USB charging interface when detecting that the current value of the USB charging interface is greater than 1.5A.

In one possible implementation, the power management chip is further configured to turn off the USB charging interface after a preset time interval when detecting that the current value of the USB charging interface is less than 45 mA.

In one possible implementation, the power supply device further includes a switch of the USB charging interface, and is connected to an enable end of the USB charging interface.

In one possible implementation, the motherboard includes an ac-DC converter that converts ac to 12V DC, the first DC/DC converter is connected, the first DC/DC converter converts 12V DC to 5V DC, and the first device includes an interface other than a USB charging interface.

In one possible implementation, the motherboard includes an ac-DC converter that converts ac to 12V DC, and the second DC/DC converter is connected to the ac-DC converter and converts the 12V DC to 3.3V DC.

In a second aspect, an embodiment of the present application provides an electronic device, including: the power supply device of the USB charging interface of the mainboard.

Through the power supply device, the USB charging interface can provide normal charging under the condition that the main board bios sets the EUP option and the main board is in a power-off state.

Drawings

Fig. 1 is a schematic structural diagram of a power supply device of a USB charging interface of a motherboard according to an embodiment of the present disclosure;

fig. 2 is a specific circuit implementation diagram of a MOS transistor switch according to an embodiment of the present application;

FIG. 3 is a specific circuit implementation diagram of a current sense resistor and a current monitoring chip according to an embodiment of the present application;

fig. 4 is a specific circuit implementation diagram of a USB charging interface according to an embodiment of the present application.

Detailed Description

Various aspects and features of the present application are described herein with reference to the accompanying drawings.

It should be understood that various modifications may be made to the embodiments of the application herein. Therefore, the above description should not be taken as limiting, but merely as exemplification of the embodiments. Other modifications within the scope and spirit of this application will occur to those skilled in the art.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.

These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.

It is also to be understood that, although the present application has been described with reference to some specific examples, those skilled in the art can certainly realize many other equivalent forms of the present application.

The foregoing and other aspects, features, and advantages of the present application will become more apparent in light of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application with unnecessary or excessive detail. Therefore, specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.

The specification may use the word "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments as per the application.

First, the design concept of the embodiment of the present application will be briefly described.

At present, the motherboard bios is usually provided with an EUP option, once the EUP option is turned on, all IO ports are not electrified after the PC is turned off, and in this case, the user cannot use the USB charging interface to charge the device. If the user wants to still charge the device through the USB charging interface after the PC is powered off, the EUP option of the bios needs to be turned off in advance, and after the device is charged, the EUP option of the bios needs to be turned on again, so that the operation is complex.

In addition, after the main board bios opens the EUP option, the main board shutdown zero power consumption cannot be completely realized, and the Audio, the Hub, the local area network LAN and other ICs (Integrated Circuit integrated circuits) still have standby power consumption, only the designer controls to be below 1W through actual debugging.

In order to solve the technical problems, the power supply circuit of the existing main board is improved, the 5V power supply voltage of all interfaces is divided into two paths, the first path is used for supplying power to the USB charging interface, the second path is used for supplying power to other interfaces, and an MOS tube switch is added in front of a power switch of the second path; after the main board is powered off, the MOS tube switch is disconnected to close the power supply of the second path and close the 3V power supply voltage (power supply for other devices of the main board), so that the 5V power supply voltage only supplies power to the USB charging interface, and the USB charging interface is ensured to continuously provide a charging function.

In addition, in order to further reduce the power consumption, the current detection circuit is added before the USB charging interface so as to monitor whether the USB charging interface is in a charging state. If the USB charging interface is detected to have charging current output after shutdown, the voltage of the USB charging interface is kept at normal level. If the USB charging interface is monitored to have no current, the USB charging interface is controlled to be powered off after a period of time so as to improve the power consumption of shutdown.

Through the power supply device, the USB charging interface can be charged normally after the main board is powered off, and the USB charging interface can automatically power down when in an idle state, so that the power-off zero power consumption is realized.

After the application scenario and the design idea of the embodiment of the present application are introduced, the technical solution provided by the embodiment of the present application is described below.

As shown in fig. 1, an embodiment of the present application provides a power supply device of a USB charging interface of a motherboard, where the motherboard includes: the power supply device comprises a first DC/DC converter, a power switch, a first device, a second DC/DC converter and a second device, wherein the first DC/DC converter, the power switch and the first device are sequentially connected; the second DC/DC converter is connected with a second device; the power supply device includes: a MOS tube switch and a power management chip; the MOS tube switch is respectively connected with the first DC/DC converter and the power switch, and the power management chip is connected with the MOS tube switch, the second DC/DC converter and the USB charging interface; the power management chip is configured to control the MOS tube switch to be switched off and control the second DC/DC converter to be switched off when the main board is detected to be powered off.

Preferably, the USB charging interface is a USB fast charging interface.

In an embodiment of the application, the motherboard comprises an alternating current-direct current converter (PSU-12V) converting alternating current to 12V direct current, the first DC/DC converter (+5v_dsw) being connected to the alternating current-direct current converter, the first DC/DC converter converting the 12V direct current to 5V direct current, the first DC/DC converter powering the first device; the first device includes I/O interfaces other than a USB charging interface, such as an audio USB interface, a hub interface, and other USB interfaces.

The second DC/DC converter (+3v3_s5) is connected to an ac/DC converter, which converts the 12V direct current to 3.3V direct current, which powers the second device. The second device comprises a trusted cryptography module TCM, a local area network chip and the like.

The power management chip is connected with the control end of the MOS tube switch and the enabling end of the second DC/DC converter through an H/L voltage control signal line (5VSB_CTRL_L) respectively.

Preferably, the MOS transistor switch is an N-type MOS transistor switch. Fig. 2 is a specific circuit implementation diagram of the MOS transistor switch.

For example, after the motherboard bios turns on the EUP option, when the motherboard is turned off, the power management chip pulls up 5vsb_ctrl_l to simultaneously turn off +3v3_s5 (second DC/DC converter) and turn off the MOS transistor switch, so that the USB charging interface can be normally used under the condition of meeting the power consumption of 1W of shutdown, and meets the user requirement.

In an embodiment of the present application, the power supply device further includes: a current sensing resistor and a current monitoring chip; the specific implementation circuit is shown in fig. 3. The current sensing resistor is respectively connected with the first DC/DC converter, the USB charging interface and the current monitoring chip, the current monitoring chip is connected with the power management chip, and the current monitoring chip is configured to obtain the current value of the USB charging interface through the current sensing resistor and send the current value to the power management chip.

The power management chip is configured to close the USB charging interface when detecting that the current value of the USB charging interface is larger than 1.5A, namely the current exceeds 1.5A defined by the DCP of the specification, indicating that the rear end is short-circuited.

The power management chip is further configured to close the USB charging interface after a preset time interval when detecting that the current value of the USB charging interface is smaller than 45mA, indicating that the user equipment is full or the USB charging interface is in an idle state. The time interval is, for example, 15s.

When the current value of the USB charging interface is between 45mA and 1.5A, the USB charging interface is in a charging state, and the 5V voltage provided by the first DC/DC converter supplies power for the USB charging interface.

Preferably, the power supply device further comprises a switch of the USB charging interface, and the switch is connected with an enabling end of the USB charging interface. The switch can be arranged on the case outside the main board to control the opening and closing of the USB charging interface after the shutdown.

For example, after the USB charging interface is turned off due to the end of charging or in an idle state, if the user wants to continue to use the interface in a shutdown situation, the switch of the USB charging interface may be turned on to turn on the USB charging interface.

Fig. 4 is a circuit diagram of a specific implementation of a USB charging interface, where UUS6 is the USB charging interface, and a switch of the USB charging interface is turned on, i.e. an EN signal of UUS6 is turned on; and the switch of the USB charging interface is turned off, namely the EN signal of UUS6 is turned off.

Based on the same conception, the embodiment of the application provides an electronic device, which comprises: the power supply device of the USB charging interface of the mainboard.

The electronic device may be, for example, an electronic device including a motherboard such as a computer, a notebook computer, or the like; the embodiments of the present application are not particularly limited.

The electronic device in this embodiment adopts the power supply device of the USB charging interface of the motherboard, thereby having the same technical effects as the power supply device of the USB charging interface of the motherboard. Through power supply unit, mainboard bios sets up the EUP option and mainboard shutdown state, the USB interface that charges of electronic equipment can provide normal charging.

Furthermore, although illustrative embodiments are described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of schemes across various embodiments), adaptations or alterations based on the present disclosure. Elements in the claims will be construed broadly based on the language used in the claims and not limited to examples described in the specification or during the lifetime of the application. Furthermore, the steps of the disclosed methods may be modified in any manner, including by reordering steps or inserting or deleting steps. It is intended, therefore, that the description be regarded as examples only, with a true scope being indicated by the following claims and their full range of equivalents.

The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments may be used by those of ordinary skill in the art after reading the above description. Moreover, in the foregoing detailed description, various features may be grouped together to simplify the present disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Thus, the following claims are incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with one another in various combinations or permutations. The scope of the utility model should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

Claims

1. A power supply device of USB charging interface of a main board, wherein the main board comprises: the power supply device comprises a first DC/DC converter, a power switch, a first device, a second DC/DC converter and a second device, wherein the first DC/DC converter, the power switch and the first device are sequentially connected; the second DC/DC converter is connected with a second device; the power supply device is characterized by comprising: a MOS tube switch and a power management chip; the MOS tube switch is respectively connected with the first DC/DC converter and the power switch, and the power management chip is connected with the MOS tube switch, the second DC/DC converter and the USB charging interface; the power management chip is configured to control the MOS tube switch to be switched off and control the second DC/DC converter to be switched off when the main board is detected to be powered off.

2. The power supply device of the USB charging interface of the motherboard of claim 1, wherein the power management chip is connected to the control terminal of the MOS transistor switch and the enable terminal of the second DC/DC converter through an H/L voltage control signal line, respectively.

3. The power supply device of a USB charging interface of a motherboard according to claim 1 or 2, wherein the MOS transistor switch is an N-type MOS transistor switch.

4. The power supply device of the USB charging interface of the motherboard of claim 1, further comprising: a current sensing resistor and a current monitoring chip; the current sensing resistor is respectively connected with the first DC/DC converter, the USB charging interface and the current monitoring chip, the current monitoring chip is connected with the power management chip, and the current monitoring chip is configured to acquire the current value of the USB charging interface through the current sensing resistor and send the current value to the power management chip.

5. The power supply device of the USB charging interface of claim 4, wherein the power management chip is further configured to turn off the USB charging interface when detecting that the current value of the USB charging interface is greater than 1.5A.

6. The power supply device of the USB charging interface of the motherboard of claim 4, wherein the power management chip is further configured to turn off the USB charging interface after a preset time interval when detecting that the current value of the USB charging interface is less than 45 mA.

7. The power supply device of a USB charging interface of a motherboard according to claim 1, further comprising a switch of the USB charging interface, connected to an enable terminal of the USB charging interface.

8. The power supply device of a USB charging interface of a motherboard according to claim 1, wherein the motherboard includes an ac-DC converter that converts ac to 12V DC, the first DC/DC converter being connected to the ac-DC converter, the first DC/DC converter converting 12V DC to 5V DC, the first device including an interface other than the USB charging interface.

9. The power supply device of the USB charging interface of the motherboard of claim 1, wherein the motherboard includes an ac-DC converter that converts ac to 12V DC, the second DC/DC converter being connected to the ac-DC converter, the second DC/DC converter converting the 12V DC to 3.3V DC.

10. An electronic device, comprising: a power supply device for a USB charging interface of a motherboard according to any one of claims 1 to 9.