CN106505686A - USB charging control device and mobile terminal - Google Patents

Abstract

The invention provides a USB charging control device and a mobile terminal, wherein the USB charging control device comprises: the device comprises a control module, an electronic switch module and a USB interface module, wherein the USB interface module is provided with a first differential signal port and a charging port; the control module is connected with the first differential signal port through the electronic switch module and is used for detecting a signal of the first differential signal port to identify the charging type; and the power supply port of the electronic switch module is respectively connected with the charging port and the control module so as to respectively obtain working voltage from the charging port and the control module. The invention can avoid charging type identification error caused by power failure of the electronic switch module.

Description

USB charging control device and mobile terminal

technical field

The invention relates to the communication field, in particular to a USB charging control device and a mobile terminal.

Background technique

At present, mobile intelligent terminals such as smartphones and tablet computers all have charging functions. In the early design, because the USB (Universal Serial Bus, universal serial bus) circuit is relatively simple, the interface design is directly connected to the control chip, which makes the charging type identification very simple and reliable.

As the design of smart terminal equipment becomes more and more complex, the USB interface not only supports the charging function, but also needs to support functions such as serial ports and earphones. Therefore, an electronic switch module is required for multi-channel switching. The electronic switch module is battery powered from the terminal. However, in some special scenarios, when the battery has no power or insufficient power, the electronic switch module cannot obtain enough voltage, and the switching function will be abnormal, which will lead to incorrect identification of the charging type, and then lead to abnormal charging.

Contents of the invention

Embodiments of the present invention provide a USB charging control device and a mobile terminal to solve the technical problem in the prior art that the electronic switch module is powered off and the charging type is incorrectly identified.

The present invention provides a USB charging control device, comprising: a control module, an electronic switch module and a USB interface module, and the USB interface module has a first differential signal port and a charging port;

The control module is connected to the first differential signal port through the electronic switch module, so as to detect the signal of the first differential signal port to identify the charging type;

The power supply port of the electronic switch module is respectively connected with the charging port and the control module, so as to obtain the working voltage from the charging port and the control module respectively.

The present invention also provides a mobile terminal, including a battery and the USB charging control device described in any one of the above, and the battery is connected to the USB charging control device.

The USB charging control device and the mobile terminal in the embodiment of the present invention connect the electronic switch module to the charging port of the USB interface module and the control module respectively, so that even when the battery of the terminal is dead or the voltage is too low, the electronic switch module The working voltage can also be obtained from the USB interface module, so as to avoid the charging type identification error caused by the power failure of the electronic switch module.

Description of drawings

FIG. 1 is a structural diagram of a USB charging control device in a preferred embodiment of the present invention.

FIG. 2 is a structural diagram of an electronic switch module of a USB charging control device in a preferred embodiment of the present invention.

Fig. 3 is a structural diagram of another USB charging control device in a preferred embodiment of the present invention.

Fig. 4 is a structural diagram of another USB charging control device in a preferred embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present disclosure may repeat reference numerals and/or reference letters in different instances, such repetition is for simplicity and clarity and does not in itself indicate a relationship between the various embodiments and/or arrangements discussed. In addition, various specific process and material examples are provided herein, but one of ordinary skill in the art may recognize the use of other processes and/or the use of other materials.

Please refer to FIG. 1 , in this preferred embodiment, the USB charging control device includes: a control module 10 , an electronic switch module 20 and a USB interface module 30 .

Wherein, the USB interface module 30 has a first differential signal port, a charging port 32, an ID port 33 and a ground port 34; the first differential signal port includes a first positive signal port (D+) 311 and a first negative signal port (D- )312.

The control module 10 is connected to the first differential signal port through the electronic switch module 20 for detecting the signal of the first differential signal port to identify the charging type. The control module 10 is connected with the charging port 32 and the battery 40 for charging the battery 40 in a corresponding charging mode according to the charging type. The electronic switch module 20 is respectively connected with the charging port 32 of the USB interface module 30 and the control module 10 to obtain the working voltage from the charging port 32 and the control module 10 respectively.

Wherein, the control module 10 has a second differential signal port, a voltage input port 12 , a power supply output port 13 , a charging output port 14 , a power collection port 15 and an ID identification port 16 .

Wherein, the second differential port includes a second positive signal port 111 and a second negative signal port 112 . The second positive signal port 111 is connected to the corresponding signal port of the electronic switch module 20 to be connected to the first positive signal port of the USB interface module 30 through the electronic switch module 20 . The second negative signal port 112 is connected to the corresponding signal port of the electronic switch module 20 to be connected to the first negative signal port of the USB interface module 30 through the electronic switch module 20 . The control module 10 identifies the charging type through the second differential signal port 11 .

The voltage input port 12 is connected to the charging port 32 of the USB interface module 30 to obtain the voltage obtained from the outside by the USB interface module 30 .

The power supply output port 13 is connected to the electronic switch module 20 to supply power to the electronic switch module 20 when the battery power of the terminal is normal.

The charging output port 14 is connected to the battery 40 of the terminal for outputting a charging voltage to the battery 40 of the terminal. The control module 10 adopts a corresponding charging strategy to charge the battery 40 according to the charging type.

The power collection port 15 is connected to the battery for obtaining voltage from the battery 40 or detecting the voltage of the battery 40 so as to judge the power of the battery 40 .

The ID identification port 16 is connected to the ID port 33 of the USB interface module 30 for identifying signals therein, so as to determine whether the current terminal is a slave device or a master device.

Please refer to FIG. 2 at the same time, the electronic switch module 20 includes a power supply unit 21, a control unit 22, a gating unit 23, at least three differential signal ports, a power supply port 24 and a control port 25, wherein in this embodiment, the at least three The differential signal ports are respectively the third differential signal port 27a, the fourth differential signal port 27b, the fifth differential signal port 27c, and the sixth differential signal port 27d. The control unit 22 is connected to the gate unit 23 , and the third differential signal port, the fourth differential signal port, the fifth differential signal port and the sixth differential signal port are connected to the gate unit 23 respectively.

The power supply port 24 is respectively connected to the charging port 32 of the USB interface module 30 and the power supply output port 13 of the control module 10 to obtain electric energy from the control module 10 or the USB interface module 30 respectively. The power supply port 24 is connected to the power supply unit 21 , and the power supply unit 21 is connected to the control unit 22 for supplying power to the control unit 22 of the electronic switch module 20 . The power supply unit 21 can be a charge pump, and of course can also be other voltage conversion circuits.

The control port 25 is connected to the baseband of the terminal to obtain baseband control signals. The control unit 22 is connected to transmit the received control signal to the control unit 22 . The control unit 22 is respectively connected with the at least two gating units, that is, the first gating unit 231 and the second gating unit 232, so as to control the first gating unit 231 and the second gating unit according to the control signal. 232 works in a corresponding manner, that is, the control unit 22 is used to control the gating unit 23 to connect the third differential signal port with one of the fourth differential signal port, the fifth differential signal port and the sixth differential signal port. connect.

The control unit 22 can be implemented by using a logic control chip connected to an operational amplifier, or by using a single integrated chip. For example, in this embodiment, the control unit 22 includes a logic control chip and two operational amplifiers respectively connected to the logic control chip. The gating unit 231 is a common gating circuit or a gating chip.

In this embodiment, the gating unit 23 includes a first gating unit 231 and a second gating unit 232 , and the first gating unit 231 and the second gating unit 232 are respectively connected to the control unit 22 .

Wherein, the third differential signal port includes a third positive signal sub-port 271a and a third negative signal sub-port 272a. The fourth differential signal port includes a fourth positive signal sub-port 271b and a fourth negative signal sub-port 272b. The fifth differential signal port includes a fifth positive signal sub-port 271c and a fifth negative signal sub-port 272c. The sixth differential signal port includes a sixth positive signal sub-port 271d and a sixth negative signal sub-port 272d.

Wherein, the first gating unit 231 is respectively connected to the third positive signal sub-port 271a, the fourth positive signal sub-port 271b, the fifth positive signal sub-port 271c and the sixth positive signal sub-port 271d. The second gating unit 232 is respectively connected to the third negative signal sub-port 272a, the fourth negative signal sub-port 272b, the fifth negative signal sub-port 272c and the sixth negative signal sub-port 272d. The control unit 22 controls the first gating unit 231 to connect the third positive signal sub-port 271a with the fourth positive signal sub-port 271b, the fifth positive signal sub-port 271c and the sixth positive signal sub-port according to the received control signal. 271d, and control the second gating unit 232 to connect the third negative signal sub-port 272a with one of the fourth negative signal sub-port 272b and the fifth negative signal sub-port 272c according to the received control signal. port connection.

Wherein, in this embodiment, the fourth positive signal sub-port 271b is a DP port, and the fourth negative signal sub-port 272b is a DN port. The fifth positive signal sub-port 271c is an HDP port, and the fifth negative signal sub-port 272c is an HDN port. The sixth positive signal sub-port 271d is an AUDP port, and the sixth negative signal sub-port 272d is an AUDN port.

As can be seen from the above, the embodiment of the present invention connects the power supply port 24 of the electronic switch module 20 to the charging port 32 of the USB interface module 30 and the power supply output port 13 of the control module 10 respectively, so that even if the battery 40 of the terminal is out of power or When the voltage is too low, the electronic switch module 20 can also obtain the working voltage from the USB interface module, so as to avoid incorrect identification of the charging type caused by the power failure of the electronic switch module 20 .

In other embodiments, as shown in FIG. 3 , the power supply port 24 of the electronic switch module 20 is connected to the power supply output port 13 of the control module 10 through a diode D1 . Wherein, the anode of the diode D1 is connected to the power supply output port 13 of the control module 10 , and the cathode of the diode D1 is connected to the power supply port 24 of the electronic switch module 20 . The diode D1 prevents the voltage provided by the USB interface module 30 from directly pouring into the control module 10 , which has the function of protecting the control module 10 .

In other embodiments, as shown in FIG. 4 , the power supply port 24 of the electronic switch module 20 is connected to the charging port of the USB interface module 30 through a voltage stabilizing circuit U, so as to prevent damage to the electronic switch module 20 by the pulse current. Or it is used to prevent damage to the electronic switch module 20 due to overvoltage. For example, the voltage stabilizing circuit U can use a voltage stabilizing diode.

The embodiment of the present invention also provides a mobile terminal, including a battery and a USB charging control device, the battery is connected to the USB charging control device, and the USB charging control device is the USB charging control device in the above embodiment.

In summary, although the present invention has been disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present invention, and those of ordinary skill in the art can make various modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope defined in the claims.

Claims (10)

1. A USB charging control device, characterized in that, comprising: a control module, an electronic switch module and a USB interface module, the USB interface module having a first differential signal port and a charging port; The control module is connected to the first differential signal port through the electronic switch module, so as to detect the signal of the first differential signal port to identify the charging type; The power supply port of the electronic switch module is respectively connected with the charging port and the control module, so as to obtain the working voltage from the charging port and the control module respectively. 2. The USB charging control device according to claim 1, wherein the power supply port of the electronic switch module is connected to the control module through a diode, the anode of the diode is connected to the control module, and the anode of the diode is connected to the control module. The negative pole is connected with the power supply output port of the electronic switch module. 3. The USB charging control device according to claim 1, wherein the power port of the electronic switch module is connected to the control module through a voltage stabilizing circuit. 4. The USB charging control device according to claim 3, wherein the voltage stabilizing circuit is a voltage stabilizing diode. 5. The USB charging control device according to claim 1, wherein the electronic switch module comprises a control unit, a gating unit, a third differential signal port, a fourth differential signal port, a fifth differential signal port, and a second differential signal port. Six differential signal ports; The control unit is connected to the gating unit, and the third differential signal port, the fourth differential signal port, the fifth differential signal port, and the sixth differential signal port are respectively connected to the gating unit; The control unit is configured to control the gating unit to connect the third differential signal port to one of the fourth differential signal port, the fifth differential signal port and the sixth differential signal port. 6. The USB charging control device according to claim 5, further comprising a power supply unit connected to the power supply port and the control unit. 7. The USB charging control device according to claim 6, wherein the power supply unit is a charge pump. 8. The USB charging control device according to claim 6, wherein the power supply unit is a voltage conversion circuit. 9. The USB charging control device according to claim 1, wherein the first differential signal port includes a first positive signal sub-port and a first negative signal sub-port. 10. A mobile terminal, characterized in that it comprises a battery and a USB charging control device, the battery is connected to the USB charging control device, and the USB charging control device is the USB charging control device described in any one of claims 1-9. Charge control device.