CN106549463B - USB TYPE-C PD bypass charging circuit - Google Patents
USB TYPE-C PD bypass charging circuit Download PDFInfo
- Publication number
- CN106549463B CN106549463B CN201710021597.1A CN201710021597A CN106549463B CN 106549463 B CN106549463 B CN 106549463B CN 201710021597 A CN201710021597 A CN 201710021597A CN 106549463 B CN106549463 B CN 106549463B
- Authority
- CN
- China
- Prior art keywords
- mobile power
- adapter
- load
- detection module
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Power Sources (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a USB TYPE-C PD bypass charging circuit, which comprises an adapter access detection module, a TypeC signal line switching module and an output load access detection module, wherein the adapter access detection module comprises an adapter and a mobile power input end, and the output load access detection module comprises a mobile power output end and a load end; the TypeC signal line switching module comprises an MCU, and a CC signal switching switch S1 and a CC signal switching switch S2 which are controlled to be opened or closed by the MCU, wherein the CC signal switching switch S1 and the CC signal switching switch S2 are arranged between a CC pin of a mobile power input end and a CC pin of a mobile power output end in a crossing way. The realization of the USB TYPE-C PD bypass function is that whether Sink equipment is accessed is detected by the TYPE-C Source end through detecting the CC signal, PD communication can be actively initiated to provide proper, quick and safe power supply level for Sink after the access is detected, the difficulty of implemented software is greatly reduced, and meanwhile, the stability, the compatibility and the safety are obviously improved.
Description
Technical Field
The invention relates to the technical field of USB TYPE-C bypass functions, in particular to a USB TYPE-C PD bypass charging circuit.
Background
With the development of USB connectors, a new generation of USB connector USB Type-C is proposed. The new interface is characterized by thinner appearance, faster transmission speed, stronger power transmission capability and support of the two-sided forward and reverse plug-in function. These new features of USB Type-C greatly improve the user experience of traditional USB, support blind mating, and can provide up to 100W of power transfer with support of the USB Power Delivery (USB PD) protocol. Because of the strong power transmission capability of USB Type-C, a series of products using USB Type-C interface, such as personal computers, tablet computers, and mobile phones, are presented in the market, including MACBook, which is a new version. In order to meet the function of quick charging of equipment, power transmission with different voltage levels is required to be realized by matching with a Type-C PD protocol. The Type-C PD protocol can theoretically achieve any voltage output of up to 20V in steps of 10mV, but currently commonly used PD voltage levels are 5V, 9V, 12V, 15V and 20V.
Due to the great popularization of USB Type-C products and the higher requirement on the charging speed, a mobile power supply with Type-C PD function appears. The mobile power supply with the Type-C PD function can provide proper voltage for different USB Type-C devices, and the charging speed of the devices is improved. When the input end of the mobile power supply is connected with the adapter, and the output end of the mobile power supply is connected with the load, the power of the adapter needs to be directly bypassed to the output end of the mobile power supply for directly supplying power to the load for the mobile power supply supporting the bypass function. The input end and output end of the traditional mobile power supply are 5V, and the function is relatively simple to realize. However, as a mobile power supply supporting Type-C PD, its input terminal will follow the power supply capability of the connected adapter to select a suitable voltage, and its output terminal will select different power supply voltages according to the different connected loads. Thus, the mobile power supply has various voltage levels at the input end and the output end when being charged and discharged independently. Therefore, when the bypass function is performed on the mobile power supply with the input and output terminals supporting the PD function, the voltage levels of the input and output terminals need to be matched again to enable the load to acquire safe power supply voltage from the adapter terminal, otherwise, the risk of damage to the load exists.
In order to realize the mobile power bypass function of supporting the PD function by both input and output, the mobile power bypass function can be used for carrying out PD communication with the adapter and the load respectively at the input end and the output end of the mobile power through software, respectively acquiring the voltage and current capability which can be supported by the adapter and the voltage grade which can be accepted by the load end, and then comprehensively matching and selecting the voltage grade which can be supported by one adapter, can be accepted by the load end and can be charged quickly through a program. And finally, carrying out PD request again on the adapter according to the voltage level obtained by comprehensive program matching to obtain the matched voltage level, and simultaneously re-carrying out PD communication with the load end to apply voltage to the adapter to provide the voltage to the load so as to complete the bypass function. The mode of carrying out PD communication with the adapter and the load for many times based on the software for carrying out voltage level adjustment has high requirements on the implementation of the software, any failure of communication needs an additional software error prevention mechanism to be corrected, and the stability is relatively low. The USB Type-C push out is not long enough that the various adapters and loads of the PD function do not have to perform exactly according to the PD protocol, so there is still a great uncertainty about supporting the various adapters and loads when using this way to bypass the function, resulting in a decrease in the compatibility of the mobile power supply products. The bypass voltage is acquired through the mode that the software communicates with the adapter and the load PD for many times, so that the software requirement is high in implementation, and the stability and the compatibility are low.
Disclosure of Invention
The invention aims to provide a USB TYPE-C PD bypass charging circuit, which is used for solving the problems that the TYPE-C PD bypass provided in the background technology has high software requirements, large implementation difficulty and relatively low compatibility.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the USB TYPE-C PD bypass charging circuit comprises an adapter access detection module, a TypeC signal line switching module and an output load access detection module, wherein the adapter access detection module comprises an adapter and a mobile power input end, and the output load access detection module comprises a mobile power output end and a load end; the TypeC signal line switching module comprises an MCU, and a CC signal switching switch S1 and a CC signal switching switch S2 which are controlled to be opened or closed by the MCU, wherein the CC signal switching switch S1 and the CC signal switching switch S2 are arranged between a CC pin of a mobile power input end and a CC pin of a mobile power output end in a crossing way.
Preferably, the mobile power supply input end is provided with a resistor Rd1 and a resistor Rd2, one end of the resistor Rd1 is connected with the MCU, the other end of the resistor Rd1 is connected with the mobile power supply input end through a switch S5, one end of the resistor Rd2 is connected with the MCU, and the other end of the resistor Rd2 is connected with the mobile power supply input end through a switch S6.
Preferably, the adapter is electrically connected with the mobile power input end, and the adapter and the mobile power input end together form an adapter access detection module.
Preferably, the mobile power supply output end is electrically connected with the load end, and the mobile power supply output end and the load end form an output load access detection module together.
Compared with the prior art, the invention has the beneficial effects that: the implementation of the USB TYPE-C PD bypass function is that whether Sink equipment is connected or not is detected by a TYPE-C Source end through detecting CC signals, PD communication is actively initiated to provide proper, quick and safe power supply grades for Sink after the connection is detected, the CC signals which are connected to an adapter through detecting the CC signals which are connected to the adapter through a mobile power supply input end and the CC signals which are connected to a load through detecting the CC signals which are connected to a mobile power supply output end through detecting the adapter and the load through a mobile power supply MCU and a peripheral detection module, and then the CC signals of the adapter end are directly connected to the load through switching, so that the connection of the adapter and the load is realized, the adapter is independent of the mobile power supply, PD communication can be carried out on the load certainly, and an acceptable, quick and safe charging voltage grade is provided for the load.
Drawings
FIG. 1 is a schematic diagram of an overall implementation of the bypass function of the present invention;
FIG. 2 is a schematic diagram of an adapter access detection module according to the present invention;
fig. 3 is a schematic diagram of an output load access detection module according to the present invention.
In the figure: 1. the adapter is connected with the detection module, the TypeC signal line switching module, the output load is connected with the detection module, the adapter is connected with the adapter, the mobile power input end, the mobile power output end and the load end.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-3, the present invention provides a technical solution: the invention discloses a USB TYPE-C PD bypass charging circuit, which comprises an adapter access detection module 1, a TypeC signal line switching module 2, an output load access detection module 3, an adapter 4, a mobile power input end 5, a mobile power output end 6 and a load end 7, wherein the adapter access detection module 1, the TypeC signal line switching module 2 and the output load access detection module 3 are formed, the adapter access detection module 1 comprises an adapter 4 and a mobile power input end 5, the output load access detection module 3 comprises a mobile power output end 6 and a load end 7, the TypeC signal line switching module 2 comprises an MCU, a CC signal switching switch S1 and a CC signal switching switch S2 which are controlled to be opened or closed by the MCU, and the CC signal switching switch S1 and the CC signal switching switch S2 are arranged between a CC pin of the mobile power input end 5 and a CC pin of the mobile power output end 6 in a crossing mode.
When the adapter 4 is connected to the mobile power input end 5, when only one CC signal line exists IN the Type-C cable IN the Type-C signal line switching module 2, the mobile power needs to identify which CC pin of the mobile power input end 5 the CC signal of the Type-C cable is connected to, the CC signal switching switch S1 and the CC signal switching switch S2 of the mobile power input end 5 need to be closed first, and when the adapter 4 is connected to the mobile power input end 5 through the Type-C cable, the pull-up resistor Rp1 or Rp2 on the CC pin of the adapter 4 is connected to the resistor Rd1 or the resistor Rd2 of the mobile power input end 5 through the CC signal line inside the Type-C cable, the MCU detects the voltages on the pins of the mobile power input ends 5cc1_in and cc2_in through ADC sampling, the CC signal line of the Type-C cable with the voltage consistent with the partial pressure value of the pull-up resistor Rp and the pull-down resistor Rd is connected to the CC direction of the mobile power supply, when the load end 7 is connected to the mobile power supply output end 6, the CC signal change-over switch S1 and the CC signal change-over switch S2 of the mobile power supply output end 6 need to be closed firstly, the Rp1 or Rp2 pull-up resistor of the mobile power supply output end 6 is connected with the resistor Rd1 or the resistor Rd2 pull-down resistor of the load end 7 through the Type-C cable, and the mobile power supply can determine which CC pin of the mobile power supply output end 6 is connected with the CC signal line after the CC signal of the load end 7 is connected to through the Type-C cable by sampling the voltage of the output end CC pin of the MCU, so that the CC connection direction is determined.
IN the above embodiment, specifically, the adapter 4 is electrically connected to the mobile power input end 5, and the adapter 4 and the mobile power input end 5 together form an adapter access detection module 1, the mcu detects voltages on pins 5cc1_in and cc2_in of the mobile power through ADC sampling, and if the voltage matches with the voltage division value of the pull-up resistor Rp and the pull-down resistor Rd, the CC pin is a TypeC cable CC signal line connected to the CC direction of the mobile power;
in the above embodiment, specifically, the mobile power output end 6 is electrically connected with the load end 7, and the mobile power output end 6 and the load end 7 form the output load access detection module 3 together, and the mobile power can determine which CC pin of the mobile power output end 6 is connected to the CC signal line after the CC signal of the load is passed through the Type-C cable by detecting the voltage on the CC pin of the output end through the ADC sampling of the MCU, so as to determine the direction of CC connection.
Working principle: the invention realizes the bypass function of the USB TYPE-C PD, which consists of an adapter access detection module 1, a TypeC signal line switching module 2 and an output load access detection module 3;
further, when the adapter 4 is connected to the mobile power input end 5, only one CC signal line is connected to the Type-C cable, the mobile power needs to identify which CC pin of the input end of the mobile power is connected to the CC signal of the Type-C cable, as shown IN fig. 2, the CC signal switch S1 and the CC signal switch S2 of the mobile power input end 5 need to be closed first, when the adapter 4 is connected to the input end of the mobile power through the Type-C cable, the pull-up resistor Rp1 or Rp2 on the CC pin of the adapter 4 is connected to the resistor Rd1 or the resistor Rd2 of the mobile power input end 5 through the CC signal line IN the Type-C cable, so that a correct Type-C connection is established, the MCU detects the voltages on the mobile power input ends 5cc1_in and cc2_in pins through ADC sampling, and if the voltages coincide with the partial voltage value of the pull-up resistor Rp and the pull-down resistor Rd is the direction IN which CC signal line of the Type-C cable CC signal line is connected to the mobile power;
further, when the load is connected to the mobile power output end 6, as shown in fig. 3, the CC signal switch S1 and the CC signal switch S2 of the mobile power output end 6 need to be closed first, the Rp1 or Rp2 pull-up resistor of the mobile power output end 6 is connected to the resistor Rd1 or the resistor Rd2 pull-down resistor of the load through a Type-C cable, and the mobile power can determine which CC pin of the mobile power output end 6 the CC signal of the load is connected to through the CC signal line after the CC signal of the load is detected through ADC sampling of the MCU, thereby determining the direction of CC connection;
further, the mobile power supply entering bypass function is that under the condition that both the adapter 4 and the load are connected, according to the above detection steps, it can be clearly judged which CC pin of the mobile power supply input end 5 the CC signal wire is connected to after the adapter 4 is connected through the Type-C cable, meanwhile, it can also be judged which CC pin of the mobile power supply output end 6 is connected to the CC signal wire of the Type-C cable of the output end, as shown IN fig. 1, when both the input end and the output end of the mobile power supply detect the connection direction of the CC signal wire, the MCU needs to disconnect the S5, the S6, the S7 and the S8, and then close the Svbus switch, and then reconnect the CC circuit according to the connection direction of the detected CC signal wire, if the adapter 4 connects the CC signal to the CC1_IN pin of the mobile power supply input end 5 through the cable, and the load connects the CC signal to the CC1_OUT pin of the mobile power supply output end 6 through the cable, and then the CC signal switch S2 is disconnected, so that the adapter is connected to the CC1 through the cable and then connected to the load pin 1 through the independent wire; if the adapter 4 connects the CC signal to the CC2_IN pin of the mobile power input end 5 through the cable and the load also connects the CC signal to the CC2_OUT pin of the mobile power output end 6 through the cable, the switch of the CC signal change-over switch S1 is closed, and the switch of the CC signal change-over switch S2 is opened; otherwise, the CC signal change-over switch S1 switch should be opened, the CC signal change-over switch S2 switch should be closed, so that even if the CC signal line of the input end cable is connected to the cc1_in pin of the mobile power supply and the CC signal line of the output end cable is connected to the cc2_out or the CC signal line of the input end cable is connected to the cc2_in pin of the mobile power supply, the output end cable CC signal is connected to the cc1_out, the CC signal change-over switch S1 and the CC signal change-over switch S2 switch are also required to make a correct CC connection, so that the CC signal line of the adapter end cable is always connected to the CC signal line of the load end 7 cable, the pull-up resistor inside the adapter 4 is always connected to the pull-down resistor of the load end 7, at this time, the adapter 4 also performs PD communication with the load to apply a proper voltage, if the EMark cable of the output end of the mobile power supply needs to be supported, the VCONN 7 needs to be configured according to the detected direction of the CC signal connection of the load end 7, if the load end is required to be connected to the load end 7CC signal, the load end is always connected to the load end 2 switch is required to be opened, and if the load end of the load end is required to be opened, and the load end 2 switch is required to be opened, and the load end cable is required to be opened; if the CC signal of the cable at the load end 7 is connected to the CC2_OUT pin of the load end 7 of the mobile power supply, the S4 switch is required to be opened, the S3 switch is required to be closed, the CC1_OUT pin is used as a VCONN to supply power to the EMarok cable, all the switch switching is realized by uniformly performing switch scheduling after the MCU comprehensively judging the detected access direction of the cable at the input and output ends so as to ensure the correct connection of the circuit, and the adapter 4 connected to the mobile power supply and the load can be independently communicated with the mobile power supply to perform PD through disconnecting and reconnecting the CC communication circuit, so that the load can apply for safe and efficient power supply according to different adapters 4 connected when bypassing.
In view of the foregoing, the basic principles, features and advantages of the invention have been shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and their equivalents.
Claims (1)
1. A USB TYPE-C PD bypass charging circuit is characterized in that: the system comprises an adapter access detection module, a TypeC signal line switching module and an output load access detection module, wherein the adapter access detection module comprises an adapter and a mobile power input end, and the output load access detection module comprises a mobile power output end and a load end; the TypeC signal line switching module comprises an MCU, and a CC signal switching switch S1 and a CC signal switching switch S2 which are controlled to be opened or closed by the MCU, wherein the CC signal switching switch S1 and the CC signal switching switch S2 are arranged between a CC pin of a mobile power input end and a CC pin of a mobile power output end in a crossing way; the mobile power supply input end is provided with a resistor Rd1 and a resistor Rd2, one end of the resistor Rd1 is connected with the MCU, the other end of the resistor Rd1 is connected with the mobile power supply input end through a switch S5, one end of the resistor Rd2 is connected with the MCU, and the other end of the resistor Rd2 is connected with the mobile power supply input end through a switch S6; the adapter is electrically connected with the mobile power input end, and the adapter and the mobile power input end form an adapter access detection module together; the mobile power supply output end and the load end are electrically connected, and the mobile power supply output end and the load end form an output load access detection module together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021597.1A CN106549463B (en) | 2017-01-12 | 2017-01-12 | USB TYPE-C PD bypass charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710021597.1A CN106549463B (en) | 2017-01-12 | 2017-01-12 | USB TYPE-C PD bypass charging circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106549463A CN106549463A (en) | 2017-03-29 |
| CN106549463B true CN106549463B (en) | 2023-09-26 |
Family
ID=58397401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710021597.1A Active CN106549463B (en) | 2017-01-12 | 2017-01-12 | USB TYPE-C PD bypass charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106549463B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108984454B (en) * | 2018-09-13 | 2024-03-22 | 武汉芯昌科技有限公司 | Master-slave role integrated interface circuit based on TYPE-C protocol and detection method |
| CN111342532B (en) * | 2020-05-20 | 2020-09-08 | 北京小米移动软件有限公司 | Charging circuit and charger in-place detection method |
| CN111697663B (en) * | 2020-06-29 | 2022-02-08 | 维沃移动通信有限公司 | Charging circuit and charging cable |
| CN114113748B (en) * | 2021-11-23 | 2024-04-12 | 上海挚达科技发展股份有限公司 | Charging detection device |
| CN114490496B (en) * | 2022-02-16 | 2024-04-26 | 深圳市新龙鹏科技有限公司 | TypeC double-blind-mate communication control circuit and control method |
| CN116226010A (en) * | 2023-03-17 | 2023-06-06 | 成绎半导体(苏州)有限公司 | USB PD interface circuit, data line and charging method |
| CN117375210B (en) * | 2023-12-07 | 2024-02-20 | 广州通则康威科技股份有限公司 | Power supply circuit suitable for CPE equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881391A (en) * | 2015-06-10 | 2015-09-02 | 赛尔康技术（深圳）有限公司 | Identification circuit for USB Type-C interface |
| CN105932738A (en) * | 2016-05-31 | 2016-09-07 | 珠海市魅族科技有限公司 | Electric transmission control method, mobile power supply and terminal equipment |
| CN106030974A (en) * | 2014-11-11 | 2016-10-12 | 广东欧珀移动通信有限公司 | Power adapter and terminal |
| CN106291210A (en) * | 2015-05-22 | 2017-01-04 | 快捷半导体(苏州)有限公司 | USB interface detector, detection method, USB connector and electronic equipment |
| CN206533157U (en) * | 2017-01-12 | 2017-09-29 | 东莞市太业电子股份有限公司 | A kind of USB TYPE C PD bypass charging circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2535814B (en) * | 2015-02-25 | 2017-07-12 | Cirrus Logic Int Semiconductor Ltd | Connectors for audio data transfer |
-
2017
- 2017-01-12 CN CN201710021597.1A patent/CN106549463B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106030974A (en) * | 2014-11-11 | 2016-10-12 | 广东欧珀移动通信有限公司 | Power adapter and terminal |
| CN106291210A (en) * | 2015-05-22 | 2017-01-04 | 快捷半导体(苏州)有限公司 | USB interface detector, detection method, USB connector and electronic equipment |
| CN104881391A (en) * | 2015-06-10 | 2015-09-02 | 赛尔康技术（深圳）有限公司 | Identification circuit for USB Type-C interface |
| CN105932738A (en) * | 2016-05-31 | 2016-09-07 | 珠海市魅族科技有限公司 | Electric transmission control method, mobile power supply and terminal equipment |
| CN206533157U (en) * | 2017-01-12 | 2017-09-29 | 东莞市太业电子股份有限公司 | A kind of USB TYPE C PD bypass charging circuit |
Non-Patent Citations (1)
| Title |
|---|
| "连接器";佚名;《今日电子》(第04期);第65-66页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106549463A (en) | 2017-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106549463B (en) | USB TYPE-C PD bypass charging circuit | |
| CN106291210B (en) | USB interface detector, USB interface detection method, USB connector and electronic equipment | |
| US9606953B2 (en) | Method, apparatus, and computer program product for entering accessory docking mode in USB type C | |
| US8756358B2 (en) | Method and device for identifying universal serial bus (USB) insertion or charger insertion of mobile terminal | |
| CN104756350B (en) | High voltage special charging port | |
| US8760123B2 (en) | High voltage dedicated charging port | |
| CN105281398B (en) | Portable equipment, CA cable assembly and USB system | |
| CN108535594A (en) | Interface grafting abnormal detection circuit and method | |
| US20170005495A1 (en) | Method and apparatus for charging electronic device with usb connection | |
| US11611221B2 (en) | Electronic device and accessory with quick charging and audio transmission functions | |
| WO2019010822A1 (en) | Fast charging adapter and fast charging cable structure | |
| US10236697B2 (en) | Charge storage and power routing for dongles and adapters | |
| CN106597143B (en) | Test equipment and test method | |
| CN109494822B (en) | Terminal equipment, charger, charging system and charging method | |
| CN205355480U (en) | Single adapter and T head and H head thereof | |
| US9912016B2 (en) | Link for battery power transfer between portable electronic devices | |
| US9502911B2 (en) | Battery charging device with charging profile data update facility | |
| CN214100897U (en) | One drags two quick charge circuit and keysets thereof | |
| US9864714B2 (en) | Electronic system for performing recharging and data communication | |
| CN106549459B (en) | Determination method of charging voltage and mobile terminal | |
| CN102096457B (en) | processing device and operating system | |
| CN203520878U (en) | Multifunctional U disk | |
| CN202798652U (en) | Signal conversion circuit and interface switching equipment | |
| JP2018511879A (en) | Interface identification method and terminal | |
| CN107706977B (en) | Charging current detection method and charging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |