Disclosure of utility model
The utility model provides an external internet charging combination device and a charging system, which can realize that mobile terminal equipment such as a mobile phone, a computer and the like can charge when external equipment is used for transmitting an external network.
The utility model provides an external connection internet charging combination device which comprises an SOC chip, a charging protocol chip, a USB male head, a USB female head, a voltage reducing module and a power supply selecting module;
The SOC chip and the charging protocol chip are connected through I2C communication;
The USB male head and the USB female head comprise a power port, a communication port, a grounding end and a data port, wherein the power port is electrically connected with the power supply selection module, the communication port is electrically connected with the charging protocol chip, the grounding end is grounded, the data port of the USB male head is electrically connected with the SOC chip, and the data port of the USB female head is electrically connected with the charging protocol chip;
The power supply selection module is electrically connected with the SOC chip through the voltage reduction module and is used for supplying power to the SOC chip;
the SOC chip or the charging protocol chip is electrically connected with the power supply selection module and used for controlling a power supply source of the SOC chip.
In an embodiment, the power supply selection module includes a first PMOS power tube and a second PMOS power tube, where a source of the first PMOS power tube is connected with a source of the second PMOS power tube, a drain of the first PMOS power tube is electrically connected with a USB male power port, a drain of the second PMOS power tube is electrically connected with a power port of the USB female, and gates of the first PMOS power tube and the second PMOS power tube are respectively electrically connected with the SOC chip or the charging protocol chip.
In an embodiment, the voltage reducing module includes a first voltage reducing module and a second voltage reducing module, one end of the first voltage reducing module is electrically connected with the source electrode of the first PMOS power tube, and the other end of the first voltage reducing module is electrically connected with the SOC chip through the second voltage reducing module.
Optionally, the first voltage reducing module is a voltage reducing module for converting the voltage in the range of 5V-20V into the voltage of 5V, and the second voltage reducing module is a voltage reducing module for converting the voltage of 5V into 3.8V.
In an embodiment, the external internet charging combination device further comprises a wireless charging module, so that wireless charging is realized through a power supply externally connected with the USB female connector.
Optionally, the wireless charging module includes controller, driver, voltage-current inductor and coil, the output of driver is connected with the coil, the both ends of controller are connected with SOC chip electricity and driver electricity respectively, the both ends of voltage-current inductor are connected with the output electricity of controller and driver respectively.
In one embodiment, the high-speed clock input port of the SOC chip is electrically connected to a temperature compensated crystal oscillator.
In one embodiment, the low-speed clock input port of the SOC chip is electrically connected to a crystal oscillator.
The utility model also provides a charging system which comprises an external power supply, terminal equipment and the external internet charging combination device, wherein one end of the external internet charging combination device is electrically connected with the external power supply through a USB female head, and the other end of the external internet charging combination device is electrically connected with the terminal equipment through a USB male head.
The utility model realizes the external network transmission function of the terminal equipment by connecting the USB male head with the SOC chip, and simultaneously supplies power to the SOC chip and the mobile terminal equipment by the power supply selection module. When the USB female head is connected with the charging power supply, the power supply mode of the control chip is automatically switched, the terminal equipment is used for supplying power to the control chip and converting the power supply of the control chip into an external power supply connected with the USB female head to supply power to the control chip, and meanwhile, the external power supply can charge the terminal equipment, so that the problem that mobile terminal equipment such as a mobile phone and a computer in the prior art cannot charge an external network while transmitting power to an external network by using the external equipment and the electric quantity is exhausted is effectively solved.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the prior art, in order to improve the network transmission capability of a mobile phone terminal or a computer terminal, an external device is generally used to enable the mobile phone terminal or the computer terminal to communicate with an external network, for example, when the mobile phone is connected with the external device, a mobile phone interface is occupied, although the external network transmission is realized, the charging is influenced due to the fact that the mobile phone interface is occupied, for example, when the computer is connected with the external device, the external network transmission is realized, but when a special charger for the computer is not carried, the computer cannot effectively transmit the external network transmission and simultaneously charge. Therefore, the utility model provides the external internet charging combined device which can realize that the terminal equipment charges when the external equipment is used for transmitting the external network.
In order to make the technical scheme of the present utility model more clear, the following detailed description of the embodiments of the present utility model is given with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a use case of an external internet charging combination device provided by the utility model, fig. 2 is a schematic structural diagram of another use case of an external internet charging combination device provided by the utility model, and fig. 3 is a schematic circuit structure diagram of an external internet charging combination device provided by the utility model.
The embodiment of the utility model provides an external connection internet charging combination device which comprises an SOC chip, a charging protocol chip, a USB Male (Male), a USB Female (Femalee), a voltage reducing module and a power supply selection module, wherein the SOC chip and the charging protocol chip are in communication connection through an I2C (serial communication bus), the USB Male and the USB Female comprise a power port, a communication port, a grounding end and a data port, the power port is electrically connected with the power supply selection module, the communication port is electrically connected with the charging protocol chip, the grounding end is grounded, the data port of the USB Male is electrically connected with the SOC chip, the data port of the USB Female is electrically connected with the charging protocol chip, the power supply selection module is electrically connected with the SOC chip through the voltage reducing module and is used for supplying power to the SOC chip, and the SOC chip or the charging protocol chip is electrically connected with the power supply selection module and is used for controlling a power supply source for the SOC chip.
Referring to fig. 1, 2 and 3, the external internet charging combined device comprises an SOC chip U1, a charging protocol chip U2, a USB male head J1, a USB female head J2, a voltage reduction module and a power supply selection module, wherein the SOC chip U1 and the charging protocol chip U2 are in communication connection through I2C, the USB male head J1 and the USB female head J2 comprise a power port VBUS, a communication port CC1/CC2, a grounding end GND and a data port D+ and D-, the power port VBUS is electrically connected with the power supply selection module, the communication port CC1/CC2 is electrically connected with the charging protocol chip U2, the grounding end GND+ of the USB male head J1 is electrically connected with the SOC chip U1, the data port D+ of the USB female head J2 is electrically connected with the charging protocol chip U2 through the voltage reduction module and is used for electrically connecting the SOC chip U1, and the SOC chip U1 or the charging protocol chip U2 is electrically connected with the power supply control module and is used for electrically supplying power to the SOC chip U1.
Specifically, the USB male connector J1 can be inserted into an interface of a mobile phone or a computer terminal, the USB female connector J2 can be connected with an external power supply, such as a power supply charger, the charging protocol chip U2 is an existing chip, and can identify existing fast charging scheme chargers such as PD/QC/BC1.2/FCP, the USB male connector J1 and the USB female connector J2 can be type-c interfaces, and the connection of the external network device through the SOC chip U1 is the prior art, which is not described herein;
When the USB plug J1 is inserted into the terminal, as shown in figure 1, the terminal equipment supplies power to the SOC chip U1 through the power supply selection module when the USB plug J1 is inserted into the terminal, and when the USB plug J1 is inserted into the terminal, the USB plug J2 is inserted into the external power supply charger, as shown in figure 2, the external power supply is inserted into the external power supply charger when the USB plug J1 is inserted into the terminal, and supplies power to the SOC chip U1 through the power supply selection module and the voltage reduction module when the external power supply supplies power to the terminal through the power supply selection module and the USB plug J1.
Fig. 5 is a circuit schematic diagram of the power supply selection module in fig. 3, in some specific embodiments, as shown in fig. 5, the power supply selection module includes a first PMOS power tube Q1 and a second PMOS power tube Q2, a source S of the first PMOS power tube Q1 is connected to a source S of the second PMOS power tube Q2, a drain D of the first PMOS power tube Q1 is electrically connected to a power supply port VBUS of the USB male head J1, a drain D of the second PMOS power tube Q2 is electrically connected to a power supply port VBUS of the USB female head J2, and gates G of the first PMOS power tube Q1 and the second PMOS power tube Q2 are respectively electrically connected to the SOC chip U1 or the charging protocol chip U2.
Specifically, the SOC chip U1 and the charging protocol chip U2 may be electrically connected to the power supply selection module and used for controlling a power supply to the SOC chip U1, in some examples, as shown in fig. 1, the gates G of the first PMOS power tube Q1 and the second PMOS power tube Q2 are electrically connected to the SOC chip U1, the SOC chip U1 is used for controlling the first PMOS power tube Q1 and the second PMOS power tube Q2, and in other examples, as shown in fig. 2, in particular, the gates G of the first PMOS power tube Q1 and the second PMOS power tube Q2 are electrically connected to the charging protocol chip U2, and the charging protocol chip U2 is used for controlling the first PMOS power tube Q1 and the second PMOS power tube Q2.
In some specific embodiments, referring to fig. 4, the buck module includes a first buck module U3 and a second buck module U4, one end of the first buck module U3 is electrically connected to the source S of the first PMOS power transistor Q1, and the other end of the first buck module U3 is electrically connected to the SOC chip U1 through the second buck module U4.
In some specific embodiments, the first buck module U3 is a 5V to 20V to 5V buck module.
In some specific embodiments, the second buck module U4 is a 5V to 3.8V buck module.
Specifically, no matter terminal power supply or power supply, the voltage is converted into 5V through the first voltage reduction module U3 of the voltage reduction module, and then converted into 3.8V used by the SOC chip U1 through the second voltage reduction module U4.
Fig. 4 is a schematic structural diagram of the wireless charging module in fig. 3, and the external internet charging combination device provided by the embodiment of the utility model further includes a wireless charging module, so as to realize wireless charging through a power supply externally connected with the USB female connector J2. As shown in fig. 4, the wireless charging module includes a controller U5, a driver U6, a voltage-current sensor and a coil L, wherein an output end of the driver U6 is connected with the coil L, two ends of the controller U5 are respectively electrically connected with the SOC chip U1 and the driver U6, and two ends of the voltage-current sensor are respectively electrically connected with the output ends of the controller U5 and the driver U6.
Specifically, the 5V converted by the first voltage reduction module U3 is used for supplying power to wireless charging, the controller U5 is used as a core part of the wireless charging module and is responsible for coordinating the whole wireless charging process, including tasks such as analysis of a charging protocol, control of charging power, execution of a safety protection mechanism and the like, relevant instructions and state information from the SOC chip U1 are received, the wireless charging process is accurately controlled, the driver U6 converts a control signal sent by the controller U5 into an electric signal required by driving the wireless charging coil L, the output end of the driver U6 is connected with the coil L, the coil L is used as a transmitting end of wireless charging, an alternating electromagnetic field is generated by the coil L under the driving of the driver U6, when equipment with the wireless charging receiving coil is close (such as a wireless charging earphone) and the like, wireless transmission of electric energy can be achieved, and a voltage current sensor monitors the voltage and current state generated by the coil L in real time, so that safety and high efficiency of the wireless charging process are ensured.
In some specific embodiments, the high-speed clock input port of the SOC chip U1 is electrically connected to the temperature compensated crystal oscillator TCXO, and receives a precise and stable clock signal.
In some specific embodiments, the low-speed clock input port of the SOC chip U1 is electrically connected to the crystal oscillator crystal, so as to ensure that the SOC chip has a reliable and stable low-frequency clock reference during the operation process.
In some specific embodiments, the SOC chip U1 is connected to a bluetooth communication module, so as to facilitate bluetooth communication.
In some specific embodiments, the SOC chip U1 is connected to a GPS communication module, and integrates support for GPS signal processing, or communicates with the GPS module through an external interface, so as to obtain related data such as geographic location information, time synchronization, and the like.
In some specific embodiments, the model of the SOC chip U1 may be XY3100, XY3100 is a low power NB-IoT chip, and is integrated with BLE, GNSS and Wi-Fi Scan, and optimizes cost and power consumption performance in a device location tracking scenario, while having a smaller volume to activate more applications of the internet of things.
In some specific embodiments, the charging protocol chip U2 may be IP2723T, CYPD3171 or the like.
The embodiment of the utility model also provides a charging system which comprises an external power supply, terminal equipment and the external internet charging combination device in the embodiment, wherein one end of the external internet charging combination device is electrically connected with the external power supply through a USB female head, and the other end of the external internet charging combination device is electrically connected with the terminal equipment through a USB male head.
The embodiment of the utility model provides an external internet charging combination device and a charging system, and the specific application flow is as follows in use:
Only when the USB male head J1 is connected with the terminal, the USB female head J2 is not connected with an external power supply charger, at the moment, the charging protocol chip U2 follows the USB typeC protocol and communicates with the SOC chip U1 through I2C, the charging protocol chip U2 informs a mobile phone/a computer, and the ends of the SOC chip U1 and the charging protocol chip U2 are USB device equipment;
The CC1/CC2 pins of the USB male head J1 and the USB female head J2 are pulled down in the charging protocol chip U2 to enable the mobile phone or the computer to recognize that the equipment is in a device mode, and the mobile phone or the computer works as a USB HOST mode;
At this time, the mobile phone or the computer outputs a 5V power supply, the power supply path starts from a USB male J1 power supply pin VBUS of the terminal mobile phone/computer, the power supply path reaches the point A along a dotted line path E, the high voltage is converted into 5V (5-20V voltage is converted into 5V) through a first PMOS power tube Q1 to the point B, and then the 5V is further converted into 3.8V working voltage required by the SOC chip U1 through a second voltage reduction module U4;
Meanwhile, the SOC chip U1, the USB male head J1 and the mobile phone/computer are in data communication through a USB 2.0 interface, so that information interaction and data transmission between the Internet surfing equipment and the mobile phone/computer are realized, and the SOC chip U1 or the charging protocol chip U2 is electrically connected with the grid G, so that the conduction state of the first PMOS power tube Q1 is controlled;
After an external charger is inserted, the first PMOS power tube Q1 is controlled to be disconnected through the grid G of the first PMOS power tube Q1 and the grid G of the second PMOS power tube Q2, the second PMOS power tube Q2 is conducted, current backflow is prevented, the point B is connected with voltage to keep the SOC chip U1 to be continuously powered off, a charging protocol chip U2 component in the device is communicated with the charger through a CC1/CC2 wire or a traditional D+/D-data wire of the USB master J2, a fast charging protocol supported by the charger is identified, such as PD, FCP, QC 3.0.0/2.0, a charging mode special by Apple, an AFC and the like, or the externally inserted charger is identified to be CDP/DCP through BC1.2, and after the type of the charger is identified, the SOC chip U1 or the charging protocol chip U2 is identified to be powered on after the fast charging protocol is completed, the first PMOS power tube Q1 is controlled to be powered on;
The SOC chip U1 and the charging protocol chip U2 carry out handshake communication with a mobile phone/computer through a USB fast charging protocol, the Power Role is carried out, namely, the two parties exchange Power roles, the terminal self Power supply is stopped, the mobile phone/computer stops supplying Power to the SOC chip U1 and the charging protocol chip U2 and switches to a charging mode, and receives voltage from a charger, at the moment, the voltage of the charger is transmitted in the directions of a C point, a B point, an A point and a straight line D through a USB female J2 connection point, a second PMOS Power tube Q2, the B point, the A point and the straight line D, and the mobile phone/computer can be charged on the premise that the SOC chip U1 works normally;
meanwhile, the voltage generated by the charger passes through the point B, then the voltage generated by the charger is converted into 5V through the first voltage reduction module U3, and then the 5V is converted into 3.8V through the second voltage reduction module U4 to supply power to the SOC chip U1.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not deviate the essence of the corresponding technical solution from the scope of the technical solution of the embodiments of the present utility model.