CN210608648U - External wireless charging receiving device - Google Patents
External wireless charging receiving device Download PDFInfo
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- CN210608648U CN210608648U CN201920752012.8U CN201920752012U CN210608648U CN 210608648 U CN210608648 U CN 210608648U CN 201920752012 U CN201920752012 U CN 201920752012U CN 210608648 U CN210608648 U CN 210608648U
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Abstract
The utility model discloses an external wireless receiving arrangement that charges belongs to the wireless field of charging, specifically includes: the protocol identification logic controller is in protocol communication with the first connecting terminal and controls the direct current conversion module to output direct current voltage suitable for being connected to first external equipment of the first connecting terminal to carry out wireless charging; the data transmission switch, the first charging switch and the second charging switch are controlled through protocol communication with the second connecting terminal, and the second external equipment connected to the second connecting terminal is controlled to transmit data to and charge the first external equipment. The beneficial effects of the above technical scheme are: the wireless charging function requirement of the terminal equipment without the wireless charging receiving end can be realized, and all functions of the external interface of the terminal equipment can be switched out, so that the original functions of the equipment are not limited or reduced.
Description
Technical Field
The utility model relates to a wireless field of charging especially relates to an external wireless receiving arrangement and working method that charges.
Background
With the development of wireless communication technology, wireless charging technology gradually becomes mainstream, and people have more and more demands on wireless charging. Wherein with the help of wireless charging process, the realization that can be simple and convenient is compared in wired charging mode to mobile terminal's the charging, can save the connection of charging wire.
The currently and generally used wireless charging receiving device generally comprises a resonant circuit and an alternating voltage conversion circuit, wherein the resonant circuit is used for coupling alternating voltage of a wireless charging transmitting terminal, the alternating voltage conversion circuit is used for converting the alternating voltage into direct voltage and transmitting the direct voltage to a connecting terminal, and equipment accessing the connecting terminal is wirelessly charged.
However, in the receiving end and the terminal device for wireless charging, generally, due to the considerations of saving the manufacturing cost, simplifying the manufacturing process, and the like, only one interface for charging is arranged, but the operation requirements in actual life are ignored, when the wireless charging receiving device is used for wirelessly charging the terminal device, the charging port of the terminal device is occupied, the terminal device at this time cannot realize data transmission or other functions, and the voltage values suitable for charging are different for different terminal devices, and the unmatched voltage values are input into the terminal device to wirelessly charge the terminal device, thereby reducing the charging efficiency.
Disclosure of Invention
According to the defects and problems in the prior art, an external wireless charging receiving device is provided.
The receiving end controller receives the alternating voltage from the wireless charging transmitting end;
the input end of the direct current conversion module is connected with the output end of the receiving end controller, and the output end of the direct current conversion module is connected with a first connecting terminal;
the first signal identification end of the protocol identification logic controller is connected with the first connecting terminal and is used for identifying the charging type of the first external equipment;
a first output end of the protocol identification logic controller is connected with the direct current conversion module and outputs a corresponding control signal to control the direct current conversion module to output the charging voltage suitable for wirelessly charging the first external device;
the second connecting terminal is connected with the first connecting terminal through a data transmission channel and provides a second external device with access to the second connecting terminal, a data transmission channel for data transmission is arranged between the first external device and the second external device, and the data transmission channel is initially conducted;
a second signal identification end of the protocol identification logic controller is connected with the second connecting terminal, performs protocol communication with the second connecting terminal, and obtains the equipment type of the second external equipment according to the equipment type indication;
the voltage input end of the protocol identification logic controller is connected with the output end of the receiving end controller, and the second output end of the protocol identification logic controller is connected with a data transmission switch arranged on the data transmission channel:
when the receiving end controller supplies power to the protocol identification logic controller through the voltage input end, the protocol identification logic controller controls the data transmission switch to cut off the data transmission channel through the second output end; and
and when the protocol identification logic controller judges that the second external equipment is data transmission equipment, the protocol identification logic controller controls the data transmission switch to conduct the data transmission channel through the second output end.
Preferably, a resonant circuit is formed by connecting a capacitor and an inductor in series, and an input end of the resonant circuit is coupled to an output end of a wireless charging transmitting end to receive the alternating voltage from the wireless charging transmitting end.
Preferably, an input end of the receiving end controller is connected to an output end of the resonant tank, an output end of the receiving end controller is connected to an input end of the dc conversion module and an input end of the protocol identification logic controller, and the receiving end controller converts an ac voltage output by the resonant tank into a dc voltage and transmits the dc voltage to the dc conversion module and the protocol identification logic controller.
Preferably, the dc conversion module specifically includes:
the main controller is connected with the output end of the receiving end controller;
one end of the first resistor is connected with the output end of the receiving end controller;
the second resistor is connected between the other end of the first resistor and a ground terminal in series;
the voltage division branches are connected between the other end of the first resistor and a voltage division switch respectively and are connected with the second resistor in parallel;
each voltage division branch is respectively provided with a third resistor with the same resistance value as the second resistor, one end of the voltage division switch is connected with the voltage division branch in parallel, and the other end of the voltage division switch is grounded;
the first output end of the protocol identification logic controller is connected with the voltage division switch and is used for controlling the on-off of the voltage division switch by a control signal output by the protocol identification logic controller;
and the feedback circuit is connected out of a connecting end between the first resistor and each third resistor, is connected to the input end of the main controller, and is used for feeding back the real-time voltage value of the charging voltage to the main controller.
Preferably, the output end of the dc conversion module is connected to the input end of the first connection terminal through a first charging channel, a first charging switch for controlling on/off of the first charging channel is disposed on the first charging channel, and the first charging switch is connected to a third output end of the protocol identification logic controller;
the second connecting terminal is also connected with the first connecting terminal through a second charging channel, a second charging switch for controlling the on-off of the second charging channel is arranged on the second charging channel, and the second charging switch is connected with a fourth output end of the protocol identification logic controller;
when the protocol identification logic controller judges that the second external equipment is peripheral charging equipment, the protocol identification logic controller controls the first charging switch to be switched off through the third output end and controls the second charging switch to be switched on through the fourth output end, and the second external equipment supplies power to the first external equipment through the second charging channel.
Preferably, the protocol identification logic controller determines a level change of the pulse signal sent from the second connection terminal, and further determines that the second external device is a data transmission device.
Preferably, when the level of the pulse signal sent by the second connection terminal changes to a low level for 50% of the duration and a high level for 50% of the duration within a preset single time period, the protocol identification logic controller determines that the second external device is a data transmission device.
Preferably, when the level of the pulse signal sent by the second connection terminal changes to a low level for 30% of the duration and a high level for 70% of the duration within a preset single time period, the protocol identification logic controller determines that the second external device is a data transmission device.
Preferably, the protocol identification logic controller determines a level change of the pulse signal sent by the second connection terminal, and further determines that the second external device is an external charging device.
Preferably, when the level of the pulse signal sent by the second connection terminal changes to a duration that the low level occupies 100% or a duration that the high level occupies 100% within a preset single time period, the protocol identification logic controller determines that the second external device is a peripheral power supply device.
Preferably, a voltage input end of the protocol identification logic controller is connected with a temperature detection protection circuit, and the temperature detection protection circuit is used for detecting the internal temperature of the protocol identification logic controller and performing over-temperature protection on the protocol identification logic controller.
Preferably, a current detection circuit is arranged between the first charging switch and the first connection terminal, and is used for the protocol identification logic controller to detect the input current of the first connection terminal and perform overcurrent protection on the first connection terminal.
Preferably, a voltage detection circuit is arranged between the first connection terminal and the second connection terminal, and is used for the protocol identification logic controller to detect input voltages of the first connection terminal and the second connection terminal and perform overvoltage protection on the first connection terminal and the second connection terminal.
Preferably, the data transmission switch is kept in a closed state when the receiving end does not have current to pass through and does not work, and is used for data transmission between the first external device and the second external device.
The beneficial effects of the above technical scheme are:
(1) the wireless charging function can be realized for terminal equipment which does not have wireless charging, and the direct-current voltage value for wireless charging can be correspondingly adjusted for different types of terminal equipment, so that the charging efficiency is improved;
(2) when the terminal equipment is wirelessly charged, the terminal equipment can realize the function of data transmission with other equipment, and when the terminal equipment is not wirelessly charged, namely the wireless charging receiving device does not receive the alternating current of the wireless charging transmitting terminal, and when the wireless charging receiving device does not work, the terminal equipment can still realize the function of data transmission with other equipment.
Drawings
Fig. 1 is a schematic structural composition diagram of a receiving end in the prior art;
FIG. 2 is a schematic diagram of a receiving end according to a preferred embodiment of the present invention
FIG. 3 is a schematic diagram of the resonant tank and the controller at the receiving end according to the preferred embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating the structure of a DC conversion module according to a preferred embodiment of the present invention;
FIG. 5 is a block diagram of a protocol identification logic controller according to a preferred embodiment of the present invention;
FIG. 6 is a schematic diagram of a data transmission switch according to a preferred embodiment of the present invention;
FIG. 7 is a schematic diagram illustrating a second charge switch according to a preferred embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a temperature detection circuit according to a preferred embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating the structure of a current detection circuit according to a preferred embodiment of the present invention;
FIG. 10 is a schematic diagram illustrating the structure of a voltage detection circuit according to a preferred embodiment of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The currently commonly used wireless charging receiving device is mainly as shown in fig. 1, and includes a resonant circuit 001, a receiving terminal controller 002, a connection terminal 003, an Over Current Protection (OCP) 004 and an Over Temperature Protection (OTP) 005. Wherein, receiving end controller 002 includes an alternating current to direct current converting circuit, when the wireless receiving device that charges works, resonant circuit 001 receives the alternating voltage of the wireless transmitting end that charges, after receiving end controller 002 carries out voltage conversion, transmit direct current voltage to terminal equipment through connecting terminal 003, cycle-by-cycle current limit protection circuit 004 and temperature protection circuit 005 are connected with receiving end controller 002, wherein, cycle-by-cycle current limit protection circuit 04 limits the maximum operating current of receiving end controller 002 and connecting terminal 003, temperature protection circuit 005 limits the maximum temperature rise of receiving end controller 002 and connecting terminal 003 during operation.
In a preferred embodiment of the present invention, an external wireless charging receiving apparatus is shown in fig. 2, and specifically includes:
the receiving end controller 2 receives the alternating voltage from the wireless charging transmitting end, converts the alternating voltage into direct voltage and outputs the direct voltage;
the input end of the direct current conversion module 3 is connected with the output end 21 of the receiving end controller 2, the output end of the direct current conversion module 3 is connected with a first connecting terminal 6, and the direct current conversion module 3 is used for outputting wireless charging voltage so as to wirelessly charge a first external device 13 connected with the first connecting terminal 6;
the protocol identification logic controller 4 is connected with the first signal identification terminal 42 of the protocol identification logic controller 4 and used for identifying the charging type of the accessed first external equipment 13, and the first signal identification terminal 42 of the protocol identification logic controller 4 is connected with the first connection terminal 6;
a first output end 41 of the protocol identification logic controller 4 is connected to the dc conversion module 3, and is configured to output a corresponding control signal according to the identified charging type to control the dc conversion module 3 to output a charging voltage suitable for wirelessly charging the first external device 13;
a second connection terminal 8 connected to the first connection terminal 6 through a data transmission channel M5 and providing the second external device 14 with access to the second connection terminal 8, wherein the first external device 13 and the second external device 14 can perform data transmission through a data transmission channel M5, and the data transmission channel M5 is initially turned on;
the second signal identification terminal 44 of the protocol identification logic controller 4 is connected to the second connection terminal 8, and is used for identifying and obtaining the device type of the second external device 14;
the voltage input end 40 of the protocol identification logic controller is connected with the output end 21 of the receiving end controller 2, the second output end 46 of the protocol identification logic controller 4 is connected with the data transmission switch 9 arranged on the data transmission channel M5:
when the receiving-end controller 2 supplies power to the protocol identification logic controller 4 through the voltage input end 40, the protocol identification logic controller 4 controls the data transmission switch 9 to cut off the data transmission channel M5 through the second output end 46; and
when the device type indicates that the second external device 14 is a data transfer device, the protocol identification logic controller 4 controls the data transfer switch 9 to turn on the data transfer channel M5 through the second output terminal 46.
Specifically, the protocol for communication between the protocol identification logic controller 4 and the first connection terminal 6 and the second connection terminal 8 in the present invention is mainly a TYPE-C protocol, the protocol identification logic controller 4 performs identification control by using an LP001 chip, when the first connection terminal and the second connection terminal are not connected to an external device, the protocol identification logic controller continuously sends a low voltage square wave to detect and determine whether the external device is connected, when the first connection terminal and the second connection terminal are connected to the external device, the protocol identification logic controller 4 detects a voltage change of the first signal identification terminal 42 or the second signal identification terminal 44, and at this time, the protocol identification logic controller 4 performs protocol communication with the first external device 13 connected to the first connection terminal 6 or the second external device 14 connected to the second connection terminal 8.
Specifically, there are a large number of terminal devices without a wireless charging function, and the receiving end of the present invention can be used for terminal devices without a wireless charging function to wirelessly charge the terminal devices, and to perform data transmission to a first external device connected to a first connection terminal through a second external device connected to a second connection terminal.
In the preferred embodiment of the present invention, the input terminal of the receiving terminal controller 2 is connected to the output terminal of a resonant tank 1, and the input terminal of the resonant tank is coupled to the output terminal of a wireless charging transmitting terminal;
the resonant circuit 1 receives the alternating voltage output by the wireless charging transmitting terminal and sends the alternating voltage to the receiving terminal controller 2, and the receiving terminal controller 2 converts the input alternating voltage into direct voltage and outputs the direct voltage.
Specifically, the resonant tank 1 and the receiving-end controller 2 are structured as shown in fig. 3, the output terminal 21 of the receiving-end controller is RX _ OUT, and the resonant tank 1 is composed of an inductor L1 and capacitors C1, C2, C3, C4 and C5 connected to one end of the inductor L1 in parallel with the inductor. The input end of the resonant circuit 1 is coupled to the output end of a wireless charging transmitting end, the output end of the resonant circuit 1 is connected with the input end of the receiving end controller 2, the resonant circuit 2 receives alternating-current voltage output by the wireless charging transmitting end and sends the alternating-current voltage to the receiving end controller 2, and the receiving end controller 2 converts the input alternating-current voltage into direct-current voltage and outputs the direct-current voltage through the output end RX _ OUT.
In a preferred embodiment of the present invention, the dc conversion module 3 is configured to output a wireless charging voltage for a first external device connected to the first connection terminal to perform wireless charging.
As shown in fig. 4, the dc conversion module 3 includes:
a main controller 31 connected to the output terminal RX _ OUT of the receiving terminal controller;
a first resistor R1, wherein one end of the first resistor R1 is connected to the output terminal VOS of the main controller 31;
the second resistor R2, the second resistor R2 is connected in series between the other end of the first resistor R1 and the ground terminal;
the two voltage division branches M1 and M2 are respectively connected between the other end of the first resistor R1 and the voltage division switch Q1 and are respectively connected with the second resistor R1 in parallel;
the two voltage division branches M1 and M2 are respectively provided with a third resistor R3 and a third resistor R4 which have the same resistance as the second resistor R2, one end of a voltage division switch Q1 is connected with the voltage division branches M1 and M2 in parallel, and the other end of the voltage division switch Q1 is grounded;
the voltage dividing switch Q1 is connected to the first output end 41 of the protocol identification logic controller 4, and the corresponding port is BUCK _9V _ EN, and is configured to perform on-off control according to the control signal output by the protocol identification logic controller 4, so as to control the dc conversion module 3 to output a charging voltage suitable for wirelessly charging the first external device 13;
and a feedback line M3, which is connected to the input terminal of the main controller 31 from the connection terminal between the first resistor R1 and the third resistors R3 and R4, for feeding back the real-time voltage value of the charging voltage to the main controller 31.
Specifically, different terminal devices have different direct-current voltages suitable for wireless charging, and the direct-current conversion module 3 converts the direct-current voltage value output by the direct-current conversion module 3 through the on-off state of the voltage dividing switch Q1, so that the first external device 13 connected to the first connection terminal 6 performs more efficient wireless charging.
In a preferred embodiment of the present invention, the output terminal DC _ OUT of the DC conversion module 3 is connected to the input terminal of the first connection terminal 6 through a first charging channel M4, a first charging switch 5 for controlling the on/off of the first charging channel M4 is disposed on the first charging channel M4, the first charging switch 5 is connected to a third output terminal 45 of the protocol identification logic controller 4, and a corresponding port is VBUS _ P _ CTRL _ P1;
the second connection terminal 8 is further connected with the first connection terminal 6 through a second charging channel M6, a second charging switch 7 for controlling the on/OFF of the second charging channel M6 is disposed on the second charging channel M6, the second charging switch 7 is connected with a fourth output terminal 43 of the protocol recognition logic controller 4, and the port is composed of SW4_ CTRL and VBUS _ OFF _ CTRL;
when the device type indicates that the second external device 14 is a peripheral charging device, the protocol recognition logic controller 4 controls the first charging switch 5 to be opened through the third output terminal VBUS _ P _ CTRL _ P1, and controls the second charging switch 6 to be closed through the fourth output terminals SW4_ CTRL and VBUS _ OFF _ CTRL, and the second external device 14 supplies power to the first external device 13 through the second charging channel M6.
Specifically, the second signal identification terminal 42 of the protocol identification logic controller 4, which is composed of NET _ CC2_ P1 and NET _ CC1_ P2, is connected to the second connection terminal 8, and identifies the charging type of the second external device 14 connected to the second connection terminal 8 through protocol communication;
when the second external device 14 is a data transmission device, the protocol identification logic controller 4 controls the data transmission switch 9 to turn on the data transmission channel M5 through the second output terminal 46, which is the CC _ SW port.
When the second external device 14 is a peripheral charging device, the protocol identification logic controller 4 controls the first charging switch 5 to be opened through the third output terminal VBUS _ P _ CTRL _ P1, and controls the second charging switch 7 to be closed through the fourth output terminals SW4_ CTRL and VBUS _ OFF _ CTRL, and the second external device 14 supplies power to the first external device 13 through the second charging channel M6.
Specifically, one end 51 of the first charging switch 5 is connected to the output end of the dc conversion module, the other end 51 of the second charging switch is connected to the port 60 of the first connection terminal, and the protocol identification logic controller controls the on/off state of the first charging switch 7 through the protocol identification logic controller.
Specifically, as shown in fig. 5, the data transmission switch 9 is made of a depletion mode fet, one end 90 of the data transmission switch 9, corresponding to CC2_ P1 and CC1_ P2 in the figure, is connected to the first connection terminal, one end 91 of the data transmission switch, corresponding to CC2_ P2 and CC1_ P1 in the figure, is connected to the second connection terminal, the protocol identification logic controller controls the port 92 of the data transmission switch to be in an on-off state through CC-SW, and is closed in the initial condition of the data transmission switch 9, and when the input terminal VDDD of the protocol identification logic controller 4 receives a dc voltage transmitted by the receiving terminal controller RX _ OUT, the data transmission switch 9 is opened.
Specifically, as shown in fig. 6, the second charging switch 7 has a structure in which one end of the second charging switch 7 is connected to the first connection terminal, the other end of the second charging switch 7 is connected to the port 80 of the second connection terminal, and the protocol identification logic controller controls the on/OFF state of the second charging switch 7 through the fourth output terminals SW4_ CTRL and VBUS _ OFF _ CTRL of the protocol identification logic controller.
Specifically, when the first external device 13 is simultaneously connected to the wireless charging receiving apparatus and the peripheral power supply device, that is, the second external device 14 is the peripheral power supply device, the protocol identification logic controller 4 in the wireless charging receiving apparatus starts to operate, and after the type of the second external device 14 is determined, the first external device 13 and the second external device 14 are controlled to perform charging with higher charging efficiency than the wireless charging.
Specifically, when the first external device 13 is simultaneously connected to the wireless charging receiving device and the data transmission device, that is, the second external device 14 is the data transmission device, the first external device 13 and the receiving-end controller 2 are wirelessly charged, and the first external device 13 and the second external device 14 perform data transmission.
In an embodiment of the present invention, when the level of the pulse signal sent by the second connection terminal 14 changes to a low level for 50% of the duration time and a high level for 50% of the duration time within a predetermined single time period, or when the level of the pulse signal sent by the second connection terminal 8 changes to a low level for 30% of the duration time and a high level for 70% of the duration time within a predetermined single time period, the protocol identification logic controller determines that the second external device is a data transmission device.
The protocol recognition logic controller 4 determines the level change of the pulse signal sent from the second connection terminal 8, and further determines that the second external device 14 is an external charging device.
In an embodiment of the present invention, when the level of the pulse signal sent by the second connection terminal 8 changes to a low level for a duration of 100% within a preset single time period, or the level of the pulse signal sent by the second connection terminal 8 changes to a high level for a duration of 100%, the protocol identification logic controller 4 determines that the second external device 14 is a peripheral power supply device.
In other embodiments of the present invention, the protocol identification logic controller 4 determines the level change of the pulse signal sent by the second connection terminal 8, and the duration of the high and low levels of the pulse signal sent by the second connection terminal in a preset single time period may be different combinations of the above values, or different combinations of the above values according to actual situations, and is not limited to the specific values in the above embodiments.
In the preferred embodiment of the present invention, as shown in fig. 7, the temperature detection protection loop 10 is connected to the temperature detection protection loop 10 through a voltage input terminal 40 of the protocol identification logic controller 4, which is VDDD, and the temperature detection protection loop 10 is configured to detect an internal temperature of the protocol identification logic controller 4 and perform over-temperature protection on the protocol identification logic controller 4 when the internal temperature is higher than a predetermined temperature.
Specifically, a thermistor is arranged in the temperature detection loop, the working temperature of the protocol identification logic controller at the moment is judged through temperature detection of the thermistor, over-temperature protection is carried out on the protocol identification logic controller 4 when the temperature of the thermistor is higher than a preset temperature, and the service life of the protocol identification logic controller 4 is prolonged.
IN a preferred embodiment of the present invention, as shown IN fig. 8, the current detection circuit 11 is disposed between the output end VBUS _ TYPE OUT _ SENSE _ IN of the first charge switch 5 and the input end VBUS _ TYPE OUT of the first connection terminal 6, and the protocol identification logic controller 4 detects a current through the current detection circuit 11 and performs an overcurrent protection on the first connection terminal 6 when the current is greater than a predetermined current.
In a preferred embodiment of the present invention, as shown in fig. 9, a voltage detection circuit 12 is disposed between the first connection terminal 6 and the second connection terminal 8, and the protocol identification logic controller 4 detects the voltage through the voltage detection circuit 12 and performs overvoltage protection on the first connection terminal and the second connection terminal when the voltage is greater than a predetermined voltage.
In the preferred embodiment of the present invention, the protocol identification logic controller 4, as shown in fig. 10, the voltage input terminal VDDD of the protocol identification logic controller 4 is connected to the output terminal RX _ OUT of the receiving terminal controller 2, and receives the dc voltage from the receiving terminal controller 2, and the identification logic controller 4 disconnects the data transmission switch through the second output terminal CC _ SW;
the protocol identification logic controller 4 is connected with the first connection terminal 6 through a first signal identification terminal NET _ CC2_ P1 and NET _ CC1_ P2, performs protocol communication with the first external device 13 connected to the first connection terminal 6, obtains a direct-current voltage value suitable for wireless charging of the first external device 13, and controls the on-off state of a voltage division switch Q1 of the direct-current conversion module 3 through a first output terminal BUCK _9V _ EN, so that the direct-current conversion module outputs a voltage suitable for wireless charging of the first external device 13 through a first charging channel M4;
the second signal identification terminals NET _ CC1_ P2 and NET _ CC2_ P1 of the protocol identification logic controller 4 perform protocol communication with the first external device 14 connected to the second connection terminal 6 to obtain the device type of the second external device 14:
when the second external device 14 is a data transmission device, the protocol identification logic controller 4 closes the data transmission switch through the second output terminal CC _ SW, and the second external device 14 performs data transmission on the first external device 13;
when the second external device 14 is a peripheral power supply device, the protocol identification logic controller 4 controls the first charging switch 5 to be opened through the third output terminal VBUS _ P _ CTRL _ P1, and controls the second charging switch 7 to be closed through the fourth output terminals SW4_ CTRL and VBUS _ OFF _ CTRL, and the second external device 14 supplies power to the first external device 13 through the second charging channel M6.
The voltage input end VDDD of the protocol identification logic controller 4 is also connected with the temperature detection loop 10, and is used for judging the working temperature of the protocol identification logic controller 4 at the moment and performing temperature protection on the protocol identification logic controller 4.
The protocol recognition logic controller 4 controls the current detection circuit to detect the current input to the first connection terminal, and performs current protection on the first connection terminal and the first external device connected to the first connection terminal.
The protocol recognition logic controller 4 controls the voltage detection module to detect the voltages input to the first connection terminal and the second connection terminal, and performs voltage protection on the first connection terminal and the second connection terminal.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (14)
1. An external wireless charging receiving device, comprising:
the receiving end controller receives the alternating voltage from the wireless charging transmitting end;
the input end of the direct current conversion module is connected with the output end of the receiving end controller, and the output end of the direct current conversion module is connected with a first connecting terminal;
the first signal identification end of the protocol identification logic controller is connected with the first connecting terminal and is used for identifying the charging type of the first external equipment;
a first output end of the protocol identification logic controller is connected with the direct current conversion module and outputs a corresponding control signal to control the direct current conversion module to output the charging voltage suitable for wirelessly charging the first external device;
the second connecting terminal is connected with the first connecting terminal through a data transmission channel and provides a second external device with access to the second connecting terminal, a data transmission channel for data transmission is arranged between the first external device and the second external device, and the data transmission channel is initially conducted; a second signal identification end of the protocol identification logic controller is connected with the second connecting terminal, performs protocol communication with the second connecting terminal, and obtains the equipment type of the second external equipment according to the equipment type indication;
the voltage input end of the protocol identification logic controller is connected with the output end of the receiving end controller, and the second output end of the protocol identification logic controller is connected with a data transmission switch arranged on the data transmission channel:
when the receiving end controller supplies power to the protocol identification logic controller through the voltage input end, the protocol identification logic controller controls the data transmission switch to cut off the data transmission channel through the second output end; and
and when the protocol identification logic controller judges that the second external equipment is data transmission equipment, the protocol identification logic controller controls the data transmission switch to conduct the data transmission channel through the second output end.
2. The external wireless charging receiver according to claim 1, wherein a resonant tank is formed by connecting a capacitor and an inductor in series, and an input terminal of the resonant tank is coupled to an output terminal of a wireless charging transmitter for receiving the ac voltage from the wireless charging transmitter.
3. The external wireless charging receiver according to claim 2, wherein an input terminal of the receiving terminal controller is connected to an output terminal of the resonant tank, and an output terminal of the receiving terminal controller is connected to an input terminal of the dc conversion module and an input terminal of the protocol identification logic controller, so as to convert an ac voltage output from the resonant tank into a dc voltage and transmit the dc voltage to the dc conversion module and the protocol identification logic controller.
4. The external wireless charging receiving device according to claim 1, wherein the dc conversion module specifically comprises:
the main controller is connected with the output end of the receiving end controller;
one end of the first resistor is connected with the output end of the receiving end controller;
the second resistor is connected between the other end of the first resistor and a ground terminal in series;
the voltage division branches are connected between the other end of the first resistor and a voltage division switch respectively and are connected with the second resistor in parallel;
each voltage division branch is respectively provided with a third resistor with the same resistance value as the second resistor, one end of the voltage division switch is connected with the voltage division branch in parallel, and the other end of the voltage division switch is grounded;
the first output end of the protocol identification logic controller is connected with the voltage division switch and is used for controlling the on-off of the voltage division switch by a control signal output by the protocol identification logic controller;
and the feedback circuit is connected out of a connecting end between the first resistor and each third resistor, is connected to the input end of the main controller, and is used for feeding back the real-time voltage value of the charging voltage to the main controller.
5. The external wireless charging receiving device according to claim 1, wherein the output end of the dc conversion module is connected to the input end of the first connection terminal through a first charging channel, a first charging switch for controlling on/off of the first charging channel is disposed on the first charging channel, and the first charging switch is connected to a third output end of the protocol identification logic controller;
the second connecting terminal is also connected with the first connecting terminal through a second charging channel, a second charging switch for controlling the on-off of the second charging channel is arranged on the second charging channel, and the second charging switch is connected with a fourth output end of the protocol identification logic controller;
when the protocol identification logic controller judges that the second external equipment is peripheral charging equipment, the protocol identification logic controller controls the first charging switch to be switched off through the third output end and controls the second charging switch to be switched on through the fourth output end, and the second external equipment supplies power to the first external equipment through the second charging channel.
6. The external wireless charging receiver according to claim 1, wherein the protocol identification logic controller determines a level change of the pulse signal transmitted from the second connection terminal, and further determines that the second external device is a data transmission device.
7. The external wireless charging receiver according to claim 6, wherein the protocol identification logic controller determines that the second external device is a data transmission device when the level of the pulse signal transmitted from the second connection terminal changes to a low level for 50% of the duration and a high level for 50% of the duration within a predetermined single time period.
8. The external wireless charging receiver according to claim 6, wherein the protocol identification logic controller determines that the second external device is a data transmission device when the level of the pulse signal transmitted from the second connection terminal changes to a low level for 30% of the duration and a high level for 70% of the duration within a predetermined single time period.
9. The external wireless charging receiver according to claim 5, wherein the protocol identification logic controller determines a level change of the pulse signal sent by the second connection terminal, and further determines that the second external device is an external charging device.
10. The external wireless charging receiver according to claim 9, wherein when the level of the pulse signal sent from the second connection terminal changes to a low level for 100% of the duration or a high level for 100% of the duration within a predetermined single time period, the protocol identification logic controller determines that the second external device is an external power supply device.
11. The external wireless charging receiving device according to claim 1, wherein a voltage input terminal of the protocol identification logic controller is connected to a temperature detection protection circuit, and the temperature detection protection circuit is configured to detect an internal temperature of the protocol identification logic controller and perform over-temperature protection on the protocol identification logic controller.
12. The external wireless charging receiving device according to claim 5, wherein a current detection circuit is arranged between the first charging switch and the first connection terminal, and is used for the protocol identification logic controller to detect an input current of the first connection terminal and perform overcurrent protection on the first connection terminal.
13. The external wireless charging receiver according to claim 1, wherein a voltage detection circuit is disposed between the first connection terminal and the second connection terminal, and is configured to detect the input voltages of the first connection terminal and the second connection terminal by the protocol recognition logic controller, so as to perform overvoltage protection on the first connection terminal and the second connection terminal.
14. The external wireless charging receiving device according to claim 1, wherein the data transmission switch is kept in a closed state when the receiving terminal does not have current to pass through and does not operate, and is used for data transmission between the first external device and the second external device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920752012.8U CN210608648U (en) | 2019-05-23 | 2019-05-23 | External wireless charging receiving device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920752012.8U CN210608648U (en) | 2019-05-23 | 2019-05-23 | External wireless charging receiving device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224477A (en) * | 2019-05-23 | 2019-09-10 | 苏州蓝沛无线通信科技有限公司 | A kind of external wireless charging receiver and working method |
| WO2023010506A1 (en) * | 2021-08-06 | 2023-02-09 | 深圳市华思旭科技有限公司 | Charging circuit and electronic device |
-
2019
- 2019-05-23 CN CN201920752012.8U patent/CN210608648U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224477A (en) * | 2019-05-23 | 2019-09-10 | 苏州蓝沛无线通信科技有限公司 | A kind of external wireless charging receiver and working method |
| WO2023010506A1 (en) * | 2021-08-06 | 2023-02-09 | 深圳市华思旭科技有限公司 | Charging circuit and electronic device |
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