CN208257477U - A kind of charging control switching circuit - Google Patents
A kind of charging control switching circuit Download PDFInfo
- Publication number
- CN208257477U CN208257477U CN201820950110.8U CN201820950110U CN208257477U CN 208257477 U CN208257477 U CN 208257477U CN 201820950110 U CN201820950110 U CN 201820950110U CN 208257477 U CN208257477 U CN 208257477U
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- output end
- usb interface
- usb
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of charging control switching circuit, the control circuit includes voltage input end, at least two voltage output ends, at least two USB interfaces, the signal input part of one USB interface is connected to a voltage output end, switching circuit is connected between voltage input end and a USB interface, detection circuit, detection circuit includes driving circuit, voltage generation circuit and voltage detecting circuit, the port voltage of voltage detecting circuit detection voltage output end, driving circuit output drive signal is to switching circuit, voltage generation circuit is for generating detectable voltage signals.The charging control switching circuit of the utility model can realize that the IC of more mouthfuls of single supply output, any one USB interface support the function of fast charge, can save IC area, reduce cost by a quick-charging circuit.
Description
[technical field]
The utility model relates to charging technique fields, specifically, being related to a kind of charging control switching circuit.
[background technique]
Portable device is liked due to it has the advantages that small in size, portable by consumer, sets with portable
Standby to wait the universal of portable devices application, function constantly improve, and the function that user uses is more, the power consumption of portable device
Continue to increase, user in use, can frequently encounter the problem of battery capacity deficiency, therefore more and more people need with
When easily charge everywhere to portable devices such as portable devices, conventional charging modes speed is slow, and charging modes
It is confined to the charging limitation of conventional 5V/1.5A, cannot largely be met the needs of users.
The fast charge equipment with multiple USB outlets is more and more currently on the market, in the prior art for giving
The USB fast charge socket of the electronic products such as mobile phone charging, is generally provided only with a USB fast charge output interface, when in use, same
Time can only charge to an electronic product, and the practicality is not strong, and adaptability is not strong.
[utility model content]
The main purpose of the utility model is to provide a kind of charging equipment that more mouthfuls of output is supported suitable for internal single supply
Charging control switching circuit.
In order to realize above-mentioned main purpose, charging control switching circuit provided by the utility model includes voltage input
End, at least two voltage output ends, at least two USB interfaces, a USB interface signal input part to be connected to a voltage defeated
Outlet is connected with switching circuit, detection circuit between voltage input end and a USB interface；Detection circuit include driving circuit,
Voltage generation circuit and voltage detecting circuit, voltage detecting circuit detect the port voltage of voltage output end, and driving circuit is defeated
Driving signal is to switching circuit out, and voltage generation circuit is for generating detectable voltage signals.
It can be seen that charging control switching circuit provided by the utility model each USB interface and voltage input end it
Between be provided with a switching circuit, by being switched on and off for digital circuit and detection circuit co- controlling switching circuit, when
When an only USB interface access electronic equipment, which controls this USB interface can be with quick charge, there are two
Or more than two USB interfaces can simultaneously fill two or more electronic equipments when accessing electronic equipment simultaneously
Electricity can realize that the IC of more mouthfuls of single supply output, any one USB interface are supported by using a quick-charging circuit
The function of fast charge can save IC area, reduce cost.
Wherein, detection circuit is by driving circuit, voltage generation circuit and voltage detecting circuit composition, and wherein voltage generates
The voltage load capacity is weak that circuit generates, voltage detecting circuit can be used for detecting the output voltage of voltage output end, and use
It is detected in the insertion of electronic equipment, voltage generation circuit and driving circuit are used cooperatively the extraction inspection that can complete electronic equipment
It surveys.
Further embodiment is, driving circuit includes operational amplifier and charge pump circuit, operational amplifier and charge pump
Circuit electrical connection.
Further embodiment is that switching circuit includes NMOS tube, the grid of NMOS tube and the output end electricity of charge pump circuit
Connection.
As it can be seen that digital control drive circuit opens charge pump circuit when USB interface accesses electronic equipment, so that
On voltage input end and voltage output end access NOMS pipe conducting and to voltage output end provide voltage, to electronic equipment into
Row charging.
One Preferable scheme is that, voltage generation circuit includes voltage-stablizer, control circuit and PMOS tube, voltage-stablizer and control
Circuit electrical connection processed, control circuit control the on-off of PMOS tube.
[Detailed description of the invention]
Fig. 1 is a kind of schematic diagram for the control switching circuit embodiment that charges of the utility model.
Fig. 2 is the circuit diagram of the first detection circuit in a kind of charging control switching circuit embodiment of the utility model.
Fig. 3 is the circuit diagram of the second detection circuit in a kind of charging control switching circuit embodiment of the utility model.
Fig. 4 is the first timing diagram in a kind of charging control switching circuit embodiment of the utility model.
Fig. 5 is a kind of flow chart for the control method that charging control switching circuit embodiment is realized of the utility model.
Fig. 6 is a kind of second timing of the control method that charging control switching circuit embodiment is realized of the utility model
Figure.
Fig. 7 is a kind of third timing for the control method that charging control switching circuit embodiment is realized of the utility model
Figure.
[specific embodiment]
In order to which the objects, technical solutions and advantages of utility model are more clearly understood, with reference to the accompanying drawings and embodiments,
The present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain this
Utility model, and it is not exclusively for the utility model.
Referring to Fig. 1, a kind of charging control switching circuit of the utility model includes voltage input end 10, first voltage output
The signal input part of end 20, second voltage output end 30, the first usb 1 and secondary USB interface 2, the first usb 1 connects
It is connected to first voltage output end 20, the second end ground connection of the first usb 1, the signal input part of secondary USB interface 2 is connected to
Second voltage output end 30, the second end ground connection of secondary USB interface 2, connects between voltage input end 10 and the first usb 1
There are first switch circuit, the first detection circuit 40, second switch electricity is connected between voltage input end 10 and secondary USB interface 2
Road, the second detection circuit 40.Preferably, first switch circuit includes NMOS tube Q1, and second switch circuit includes NMOS tube Q2.
Referring to fig. 2, the first detection circuit 40 includes driving circuit 41, voltage generation circuit 42 and voltage detecting circuit
43, voltage detecting circuit 43 detects the port voltage of first voltage output end 20,41 output drive signal of driving circuit to first
Switching circuit, voltage generation circuit 42 is for generating detectable voltage signals.Driving circuit 41 includes operational amplifier and charge pump
The grid of circuit 11, NMOS tube Q1 is electrically connected with the output end of charge pump circuit 11,11 electricity of operational amplifier and charge pump circuit
Connection.As it can be seen that digital control drive circuit 41 opens charge pump circuit 11 when the first usb 1 accesses electronic equipment, from
And NOMS pipe Q1 on 20 access of voltage input end 10 and first voltage output end is connected and to first voltage output end
20 provide voltage, charge to electronic equipment.
Referring to Fig. 3, the second detection circuit 50 includes driving circuit 51, voltage generation circuit 52 and voltage detecting circuit
53, voltage detecting circuit 53 detects the port voltage of second voltage output end 30,51 output drive signal of driving circuit to second
Switching circuit, voltage generation circuit 52 is for generating detectable voltage signals.Driving circuit 51 includes operational amplifier and charge pump
The grid of circuit 21, NMOS tube Q2 is electrically connected with the output end of charge pump circuit 21,21 electricity of operational amplifier and charge pump circuit
Connection.As it can be seen that digital control drive circuit 51 opens charge pump circuit 21 when secondary USB interface 2 accesses electronic equipment, from
And NOMS pipe Q2 on 30 access of voltage input end 10 and second voltage output end is connected and to second voltage output end
30 provide voltage, charge to electronic equipment.
Preferably, voltage generation circuit 42 includes voltage-stablizer, control circuit 12 and PMOS tube Q3, voltage detecting circuit 43
Including first voltage comparator, voltage-stablizer is electrically connected with control circuit 12, and control circuit 12 controls the on-off of PMOS tube Q3, voltage
Generation circuit 52 includes voltage-stablizer, control circuit 22 and PMOS tube Q4, and voltage detecting circuit 53 includes second voltage comparator,
Voltage-stablizer is electrically connected with control circuit 22, and control circuit 22 controls the on-off of PMOS tube Q4, and first voltage comparator is for comparing
The voltage of first voltage output end 20, second voltage comparator are used to compare the voltage of second voltage output end 30.
Referring to fig. 4, Fig. 4 be the utility model it is a kind of charging control switching circuit embodiment in the first timing diagram, this when
Sequence figure is the timing diagram of the first detection circuit 40.At the t0 moment, the first usb 1 does not have electronic equipment insertion, and voltage generates electricity
42 output voltage of road is voltage Vs, and load capacity is weaker, NMOS tube Q1 stopping, and the voltage of first voltage output end 20 is
Voltage Vs, voltage detecting circuit 43 detect the voltage of first voltage output end 20, and at the t1 moment, the first USB port 1 has detected electricity
Sub- equipment insertion, starts to extract electric current to the first detection circuit 40, because of 42 load capacity is weak of voltage generation circuit, first voltage
The voltage of output end 20 is pulled low, and voltage detecting circuit 43 detects that the voltage of first voltage output end 20 is consistently less than with reference to electricity
After pressure value a period of time, which is K*Vs (K < 1), then closes the output of voltage generation circuit 42, and close electricity
Press detection circuit 43.
At the t3 moment, digital control drive circuit 41 opens charge pump circuit 11, to open voltage input end 10 and the
NMOS tube Q1 on one voltage output end, 20 access, the voltage difference at the control both ends NMOS tube Q1 are Vth3, first voltage output
The output voltage at end 20 is voltage Vout-Vth3, i.e. the voltage of voltage input end 10 subtracts the voltage difference at the both ends NMOS tube Q1,
At this point, opening voltage generation circuit 42, output voltage is voltage Vout+Vth1, because of 42 load capacity is weak of voltage generation circuit,
The connected electronic equipment of meeting is pulled down to the voltage Vout1 of first voltage output end, at this time voltage Vout1=Vout-Vth3.
At the t4 moment, the first usb 1 is disconnected with electronic equipment, the voltage Vout+ that voltage generation circuit 42 exports
Vth1 is greater than the voltage Vout1 of first voltage output end 20 at this time, and voltage Vout1 can gradually rise.
It is driven after the voltage Vout1 of first voltage output end 20 is higher than the voltage Vout of voltage input end 10 at the t5 moment
Charge pump circuit 11 in dynamic circuit 41 is closed under loop control, and NMOS tube Q1 stopping generates at this point, closing voltage
Circuit 42.
At the t6 moment, digital control opening voltage generation circuit 42 and voltage detecting circuit 43, first voltage output end 20
The voltage Vout1 of output is voltage Vs, at this point, the first USB interface waits electronic equipment connection.
So charging control switching circuit provided by the utility model is between each USB interface and voltage input end
It is provided with a switching circuit, by being switched on and off for digital circuit and detection circuit co- controlling switching circuit, when only
When having USB interface access electronic equipment, the control circuit control this USB interface can with quick charge, when there are two or two
When a above USB interface accesses electronic equipment simultaneously, it can charge, lead to two or more electronic equipments simultaneously
The IC that more mouthfuls of single supply output can be realized using a quick-charging circuit is crossed, any one USB interface all supports fast charge
Function, IC area can be saved, reduce cost.
The control method for applying above-mentioned charging control switching circuit embodiment to be realized below with reference to Fig. 5 and Fig. 7 introduction.
Referring to Fig. 5, above-mentioned charging method for handover control includes: firstly, execution step S1, determines that USB interface connects shape in no equipment
After state, detection circuit detects the port voltage of voltage output end, wherein is determining the first usb 1 and the 2nd USB
After interface 2 is in no equipment connection status, the first detection circuit 40 examines the port voltage of first voltage output end 20
It surveys, the second detection circuit 50 detects the port voltage of second voltage output end 30.
Specifically, referring to Fig. 6, Fig. 6 is that two USB interfaces are all connected to by no electronic equipment and are sequentially ingressed into two electronics and set
Standby timing diagram.At the t0 moment, two USB ports are all connected without electronic equipment, and two NMOS tubes are turned off, voltage input end 10
Output voltage is voltage V1, first voltage output end 20 and all output voltage Vs of second voltage output end 30.At the t1 moment, first
USB port 1 has electronic equipment insertion, and the voltage of first voltage output end 20 is pulled low, and the first detection circuit 40 detects the first USB
Mouth 1 has electronic equipment insertion.Wherein, when determining the first usb 1 in no equipment connection status, voltage detecting circuit 43
After the output voltage detected is consistently less than reference voltage value within the preset time, then it can determine that the first usb 1 satisfaction is set
The condition of standby connection.When determining secondary USB interface in no equipment connection status, the voltage detecting circuit of the second detection circuit
After the output voltage detected is consistently less than reference voltage value within the preset time, then it can determine that secondary USB interface satisfaction is set
The condition of standby connection, the reference voltage value are K*Vs (K < 1).
Then, step S2 is executed, however, it is determined that after the first usb 1 meets the condition of equipment connection, then disconnect the first detection
The output of the voltage detecting circuit 43 of circuit 40.Wherein, at the t2 moment, digital control 20 output voltage of first voltage output end is
0V.Then, execute step S3, judge whether to reach the first preset time, as judging result be it is no, then continue to execute step S3.
If determination reaches the first preset time, S4 is thened follow the steps, then first switch circuit conducting and to first voltage
Output end 20 provides voltage, and the first usb 1 enters the first charge mode, which is fast charge mode.Specifically
NMOS tube Q1 is opened at the t3 moment in ground, and 20 output voltage of first voltage output end is voltage V1-Vth3, and digital control inside is filled
For electric circuit connection to the first USB port 1, the first USB1 mouth 1 just supports fast charge output, if the equipment of connection supports fast charge, charging
Circuit sets the fast charge signal of equipment hair automatically, and adjustment output voltage meets electronic equipment demand, first voltage to voltage V2
The output voltage of output end 20 with voltage input end voltage change.Wherein, the value of voltage V2 is charging circuit according to electronics
The voltage of device request adjustment.
In the t3-t4 period, if the first usb 1 connection device request is low pressure fast charge, i.e. voltage V2 < voltage
V1, digital control second voltage output end 30 are adjusted to voltage Vs1 (Vs1 < Vs).
Then, step S5 is executed, when the first usb 1 is continuously in the first charge mode, is determining that the 2nd USB connects
After mouth 2 meets the condition of equipment connection, it is determined that the first usb 1 and secondary USB interface 2 are in the second charge mode, should
Second charge mode is trickle charge mode.Specifically, at the t4 moment, secondary USB interface 2 has electronic equipment insertion, and second voltage is defeated
The voltage of outlet 30 is pulled low, and the second detection circuit 50 detects that secondary USB interface 2 has electronic equipment insertion.At the t5 moment, number
Word control shutdown NMOS tube Q1 and NMOSQ2, reduce the output voltage of voltage input end 10 to voltage V1.
At the t6 moment, digital control unlatching NMOS tube Q1 and NMOSQ2, first voltage output end 20 and second voltage are exported
30 all output voltage V1-Vth3 are held, the first usb 1 and secondary USB interface 2 are in trickle charge mode, and all only support 5V defeated
BC1.2, apple and Samsung agreement out.
In above-mentioned steps S2, however, it is determined that after secondary USB interface first meets the condition of equipment connection, then disconnect the second detection
The output of the voltage detecting circuit of circuit, and judge whether to reach the second preset time, if so, then second switch circuit is connected
And voltage is provided to second voltage output end, secondary USB interface enters the first charge mode.
In above-mentioned steps S5, when the first usb 1 and secondary USB interface 2 are in the second charge mode, determine
After no equipment connection status, the voltage value of second voltage output end 30 gradually rises and is higher than voltage secondary USB interface 2
After the voltage value of input terminal 10, second switch circuit cut-off, the first usb 1 is again introduced into first within the preset time and fills
Power mode.Wherein, when secondary USB interface 2 detects the extraction of electronic equipment, the voltage of second voltage output end 30 can gradually be risen
After voltage that is high and being more than voltage input end 10, NMOS tube Q2 is turned off, at this point, secondary USB interface 2 is in detecting state, the
One usb 1 is in powered-down state, after NMOS tube Q1 turns off a period of time, can reenter step S4, the first usb 1
Into the first charge mode.
If detecting again, the electronic equipment of the first usb 1 is extracted, and can re-execute the steps S1, the first usb 1
With secondary USB interface 2 all in insertion detecting state.
It specifically, should referring to the third timing diagram that Fig. 7, Fig. 7 are in the utility model charging method for handover control embodiment
Timing diagram is two USB interfaces by there is electronic equipment to be connected to the timing diagram for disconnecting two electronic equipments and connecting.At the t0 moment,
First usb 1 has electronic equipment to connect with secondary USB interface 2, first voltage output end 20 and second voltage output end 30
All output voltage V1-Vth3.At the t1 moment, secondary USB interface 2 detects that electronic equipment disconnects, the second detection circuit 50
The voltage that middle voltage generation circuit 52 exports is higher than voltage V1-Vth3, and the voltage of second voltage output end 30 gradually rises, voltage
Detection circuit 53 detects that the electronic equipment of secondary USB interface 2 is extracted.At the t2 moment, digital control shutdown NOMS pipe Q1 and
NOMS pipe Q2, at the t3 moment, only the first usb 1 has electronic equipment connection, digital control charge inside circuit connection to
NMOS tube Q1,20 output voltage V1-Vth3 of first voltage output end are opened in one usb 1, control, and the first usb 1 is supported
Fast charge output, and according to connection electronic equipment request, the voltage Vout to voltage V2 of adjustable voltage input end 10, this
When, the output voltage of first voltage output end 20 is voltage V2-Vth3, the output of electronic equipment fast charge.
Wherein, at the t3 moment, secondary USB interface does not have electronic equipment connection, and voltage generates electricity in the second detection circuit 50
42 output voltage Vs of road, cut-in voltage detection circuit 43 detect the voltage of second voltage output end 30, identify secondary USB interface 2
Whether electronic equipment insertion is had.
At the t4 moment, the first usb 1 detects that electronic equipment is extracted, and after electronic equipment is extracted, charging circuit is detected not
It is requested to fast charge, output voltage can be adjusted to voltage V1, and since the first usb 1 does not have electronic equipment to take out electricity, voltage generates electricity
The port the LDO output voltage on road 42 is voltage V1+Vth1, and the voltage of first voltage output end 20 can gradually rise, and is made in loop
With lower closing NMOS tube Q1.
At the t5 moment, the digital control voltage generation circuit 42 closed in the first detection circuit 40, first voltage output end
Voltage become 0V, the voltage of digital control voltage input terminal is adjusted to voltage V1.
At the t6 moment, the 42 output voltage Vs of voltage generation circuit in the first detection circuit 40, cut-in voltage detection are opened
Circuit 43 detects the voltage of first voltage output end 20, and whether the first usb 1 of detection has electronic equipment insertion.At this time first
Usb 1 and secondary USB interface 2 are all inserted into without electronic equipment, 10 output voltage V1 of voltage input end, first voltage output end
20 output voltage and the output voltage of second voltage output end 30 are all voltage Vs, and two USB interfaces are detected all in insertion
Stage.
In the present embodiment, if the first usb 1 elder generation off device connects, only remaining secondary USB interface 2 has equipment connection
When, number will control charge inside circuit connection to secondary USB interface 2, at this point, secondary USB interface 2 supports fast charge output.
In the t3-t4 period, if the first usb 1 connection device request is low pressure fast charge, i.e. voltage V2 < voltage
V1, digital control second voltage output end 30 are adjusted to voltage Vs1 (Vs1 < Vs).
So charging method for handover control provided by the utility model is between each USB interface and voltage input end
It is provided with a switching circuit, by being switched on and off for digital circuit and detection circuit co- controlling switching circuit, when only
When having USB interface access electronic equipment, the control circuit control this USB interface can with quick charge, when there are two or two
When a above USB interface accesses electronic equipment simultaneously, it can charge simultaneously to two or more electronic equipments, it can
To detect the state of USB interface plug automatically, stability is high, while compatible generic USB interface, practicability are good.
It should be noted that the above is only the preferred embodiment of the utility model, but the design concept of utility model is not
It is confined to this, it is all to conceive the insubstantial modifications made to the utility model using this, also each fall within the protection of the utility model
Within the scope of.
Claims (4)
1. a kind of charging control switching circuit characterized by comprising
Voltage input end, at least two voltage output ends and at least two USB interfaces, the signal of a USB interface are defeated
Enter end and be connected to the voltage output end, switch electricity is connected between the voltage input end and a USB interface
Road, detection circuit；
The detection circuit includes driving circuit, voltage generation circuit and voltage detecting circuit, the voltage detecting circuit inspection
The port voltage of the voltage output end, the driving circuit output drive signal to the switching circuit are surveyed, the voltage produces
Raw circuit is for generating detectable voltage signals.
2. charging control switching circuit according to claim 1, it is characterised in that:
The driving circuit includes operational amplifier and charge pump circuit, and the operational amplifier is electrically connected with the charge pump circuit
It connects.
3. charging control switching circuit according to claim 2, it is characterised in that:
The switching circuit includes NMOS tube, and the grid of the NMOS tube is electrically connected with the output end of the charge pump circuit.
4. charging control switching circuit according to claim 1 or 2, it is characterised in that:
The voltage generation circuit includes voltage-stablizer, control circuit and PMOS tube, and the voltage-stablizer and the control circuit are electric
Connection, the control circuit control the on-off of the PMOS tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950110.8U CN208257477U (en) | 2018-06-20 | 2018-06-20 | A kind of charging control switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820950110.8U CN208257477U (en) | 2018-06-20 | 2018-06-20 | A kind of charging control switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208257477U true CN208257477U (en) | 2018-12-18 |
Family
ID=64654539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820950110.8U Active CN208257477U (en) | 2018-06-20 | 2018-06-20 | A kind of charging control switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208257477U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539830A (en) * | 2018-06-20 | 2018-09-14 | 深圳英集芯科技有限公司 | A kind of charging control switching circuit and control method |
-
2018
- 2018-06-20 CN CN201820950110.8U patent/CN208257477U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539830A (en) * | 2018-06-20 | 2018-09-14 | 深圳英集芯科技有限公司 | A kind of charging control switching circuit and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108539830A (en) | A kind of charging control switching circuit and control method | |
| CN103762690B (en) | Charging system | |
| CN105576766A (en) | Automatic load detection circuit and mobile power supply applying the circuit | |
| CN104810909B (en) | Control method for quickly charging and system | |
| US20130082533A1 (en) | Systems and methods for delivering power in response to a connection event | |
| US8816644B2 (en) | Interrupting the charging status of a rechargeable battery | |
| CN203747485U (en) | Electronic equipment charging device and power supply adapter thereof | |
| CN203859558U (en) | Electronic equipment and external charging circuit thereof | |
| CN211018357U (en) | Charging detection circuit, charging bin and charging system | |
| US20130113414A1 (en) | Automatic mobile device detector | |
| CN111313515A (en) | Multi-output-port fast charging switching circuit and method | |
| CN202978308U (en) | Movable power supply device | |
| CN104242389B (en) | Charging circuit, battery core and mobile terminal | |
| CN205450144U (en) | Test auxiliary circuit discharges | |
| CN105680513B (en) | A kind of electronic installation with power supply circuit | |
| CN105634143B (en) | Wireless power and power receiving device and its operating method | |
| CN104795864B (en) | A kind of mobile terminal and charged state detection method of accurate detection charged state | |
| CN106451599A (en) | Charging method and charging system | |
| CN208257477U (en) | A kind of charging control switching circuit | |
| CN202153645U (en) | Electric device based on OTG interface charging | |
| CN103855781A (en) | Charger and electronic device | |
| CN108054818A (en) | The changeable TYPEC mouthfuls charging circuits and charging method to charge with TYPEA mouthfuls or C mouthfuls chargings | |
| CN105742915A (en) | Solar powered wiring board with automatic power-off function | |
| CN203250173U (en) | Apparatus for controlling power supply | |
| CN203014439U (en) | Automatic identification apparatus of charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 3104, block a, building 8, Shenzhen International Innovation Valley, Dashi 1st Road, Xili community, Nanshan District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen yingjixin Technology Co.,Ltd. Address before: 1301, building A2, Kexing Science Park, 15 Keyuan Road, Yuehai street, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN INJOINIC TECHNOLOGY Co.,Ltd. |