CN106450991A - OTG patch cord - Google Patents
OTG patch cord Download PDFInfo
- Publication number
- CN106450991A CN106450991A CN201610822866.XA CN201610822866A CN106450991A CN 106450991 A CN106450991 A CN 106450991A CN 201610822866 A CN201610822866 A CN 201610822866A CN 106450991 A CN106450991 A CN 106450991A
- Authority
- CN
- China
- Prior art keywords
- otg
- current limiting
- resistance
- limiting element
- current
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
- H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6616—Structural association with built-in electrical component with built-in single component with resistor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/6608—Structural association with built-in electrical component with built-in single component
- H01R13/6633—Structural association with built-in electrical component with built-in single component with inductive component, e.g. transformer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6666—Structural association with built-in electrical component with built-in electronic circuit with built-in overvoltage protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses an OTG patch cord, which comprises a connecting line, a first connector, a second connector and a current limiting element, wherein the first connector and the second connector are connected to two ends of the connecting line respectively; the connecting line comprises a ground wire and a power line; and the current limiting element is connected to the power line in series. According to the OTG patch cord disclosed by the embodiment of the invention, the current limiting element is connected to the power line in series, so that the transient increase amplitude, generated by a capacitive load, of charging current in the charging process is suppressed by using the current limiting effect of the current limiting element; the problem that a primary device falsely starts an OCP protection function due to the fact that the charging current exceeds a current threshold through which the primary device starts OCP protection is solved; the fast charging process can be normally carried out; and normal use of an OTG function is ensured.
Description
Technical field
The present invention relates to electronic technology field, especially relate to a kind of OTG patchcord.
Background technology
Continuous development with electronic technology and maturation, the mobile terminal such as smart mobile phone, panel computer and various USB set
Standby become increasingly popular.Various equipment one side need to charge, and on the other hand need each other to carry out data transmission, and OTG (On-
The-Go) patchcord is just well positioned to meet aforementioned need.
When two equipment connect the two ends of OTG patchcord respectively, one of equipment is referred to as main equipment, another equipment
Referred to as from equipment, main equipment can be to from equipment charge.When main equipment possesses OTG function, successively connect master in OTG patchcord and set
Standby and after equipment, main equipment can carry out quick charge with 5V power supply to from equipment, if having larger appearance from equipment VBUS end
Property element, now charging current be instantly increased, instantaneous value can reach several amperes.
Possess the IC boosting of typically passing through to boost of the main equipment of OTG function and produce the output of 5V power supply, in order to prevent to from setting
For bringing security risk, the boosting IC of main equipment typically has overcurrent protection (Over Current Protection, OCP)
Function.While main equipment produces the output of 5V power supply, also can detect the size of output current, when the electric current of output exceedes electric current
It is judged as during threshold value (usually several ampere) from equipment short circuit, now the boosting IC of main equipment will start OCP function, close
Disconnected 5V boosting output, to shield to from equipment.
If however, main equipment connects from moment of equipment because the electric capacity transient high-current producing that charges exceedes aforementioned currents
During threshold value, main equipment will be mistaken for from equipment short circuit, and then error starting OCP function, turn off 5V boosting output, terminate quickly filling
Electric process, thus affect the normal use of OTG function.
Content of the invention
The main purpose of the embodiment of the present invention is to provide a kind of OTG patchcord it is intended to solve master during quick charge
Equipment error starting OCP and affect the normal technical problem using of OTG function.
To achieve these objectives, a kind of OTG patchcord is proposed, described OTG patchcord include connecting line, be connected to described
First union joint at connecting line two ends and the second union joint and current limiting element, described connecting line includes ground wire and power line, institute
State current limiting element to be series on described power line.
Further, described current limiting element is resistance.
Further, the resistance of described resistance is between 0 to 1 Europe.
Further, described current limiting element includes an inductance.
Further, described current limiting element also includes a backward diode, described backward diode and described inductance in parallel.
Further, described current limiting element also includes a resistance, described resistance and described inductance in parallel.
Further, the D.C. resistance resistance of described inductance is between 0 to 0.5 Europe.
Further, the resistance of described resistance is between 50 to 150 Europe.
Further, described power line is VBUS line.
Further, described connecting line also includes ID line data line.
A kind of OTG patchcord that the embodiment of the present invention is provided, by a current limiting element of connecting on the power line, using limit
The metering function of fluid element suppresses the amplitude that the charging current producing in charging process is instantly increased because of capacitive load, prevents from filling
Electric current exceedes main equipment and starts the current threshold of OCP protection and lead to main equipment error starting OCP defencive function so that quickly filling
Electric process can be normally carried out the normal use it is ensured that OTG function.
Brief description
Fig. 1 is the circuit diagram of the OTG patchcord of first embodiment of the invention；
Fig. 2 is the circuit diagram of the OTG patchcord of second embodiment of the invention；
Fig. 3 is the circuit diagram of the OTG patchcord of third embodiment of the invention；
Fig. 4 is the circuit diagram of the OTG patchcord of fourth embodiment of the invention.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment one
Referring to Fig. 1, the OTG patchcord of first embodiment of the invention is proposed, described OTG patchcord includes connecting line and connection
Head.Union joint includes the first union joint and the second union joint, is connected to connecting line two ends, wherein, connects the first union joint
Equipment be main equipment, connect the second union joint equipment be from equipment.Connecting line includes power line (as VBUS line) and ground wire
(as GND line), further, can also include ID line (as USB_ID line) data line (as USB_DM line and USB_DP line).
Additionally, the embodiment of the present invention is also additionally arranged a current limiting element, this current limiting element is series on power line, by current limliting
The metering function of element, can suppress the amplitude that in charging process, charging current is instantly increased, and prevent charging current from exceeding master and set
The standby current threshold starting OCP protection.
Current limiting element in the present embodiment is the resistance R1 of a little resistance, its Standard resistance range probably within 1 Europe, preferably
Between 0 to 0.5 Europe.
As shown in figure 1, ID line USB_ID connects ground wire GND, when the first union joint of OTG patchcord connects main equipment,
USB_ID signal enters OTG pattern by main equipment, and boosting produces the output of 5V power supply.When the second union joint of OTG patchcord connects
When equipment, the 5V power supply that main equipment boosting produces carries out quick charge to from equipment.Now, charging current is instantly increased, but
The pressure drop being series at the resistance R1 of power line VBUS also can accordingly increase and suppress the increasing degree of charging current, thus avoiding
Charging current excessive and lead to main equipment error starting OCP function it is ensured that quick charge process be normally carried out it is ensured that OTG
The normal use of function.
Embodiment two
With reference to Fig. 2, the OTG patchcord of second embodiment of the invention is proposed, the present embodiment with the difference of first embodiment is
Current limiting element is different, and the current limiting element of the present embodiment is D.C. resistance (DC Resistance, a DCR) less electricity of resistance
Sense L, its DCR Standard resistance range, probably within 1 Europe, is preferably between 0 to 0.5 Europe.
In the same manner, when charging current is instantly increased, the pressure drop being series at the inductance L of power line VBUS also can accordingly increase and press down
The increasing degree of charging current processed, thus it is excessive and lead to main equipment error starting OCP function it is ensured that fast to avoid charging current
Fast charging process be normally carried out the normal use it is ensured that OTG function.
With respect to first embodiment, because the resistance of the DCR resistance ratio resistance of inductance in the present embodiment is little, therefore normally
Pressure drop during charging is also less, such that it is able to reduce to the impact charging normal.
Embodiment three
With reference to Fig. 3, the OTG patchcord of third embodiment of the invention is proposed, the present embodiment with the difference of second embodiment is
Current limiting element also includes a backward diode D, and this backward diode D is in parallel with inductance L, i.e. inductance L and backward diode D
It is connected on power line VBUS after parallel connection.
In a second embodiment, the inductance L's that frequently plug OTG patchcord can cause to be series on power line VBUS is reverse
Potential raises, thus affecting the effect of plug OTG patchcord next time.The present embodiment is in inductance L two ends one reverse two pole of parallel connection
It is possible to the energy storage of the power down sense L that quickly releases after pipe D, quickly reduce its reverse potential, it is to avoid frequently plug OTG patchcord is made
The problem that the reverse potential of the inductance L becoming raises is it is ensured that plug the effect of OTG patchcord next time.
Example IV
With reference to Fig. 4, the OTG patchcord of fourth embodiment of the invention is proposed, the present embodiment with the difference of second embodiment is
Current limiting element also includes a resistance R2, and this resistance R2 is in parallel with inductance L, is connected on electricity after inductance L and resistance R2 parallel connection
On the line VBUS of source.The Standard resistance range of resistance R2 can arrive between hundreds of Europe tens, is preferably between 50 to 150 Europe.
In the present embodiment, the effect of parallel resistance resistance R2 is identical with the effect of backward diode D in parallel in embodiment three,
It is provided to the energy storage of power down sense L of quickly releasing, quickly reduce its reverse potential, and the one-tenth of the scheme than backward diode in parallel
This is lower.
The OTG patchcord of the embodiment of the present invention, by a current limiting element of connecting on the power line, using the limit of current limiting element
The amplitude that in stream effect suppression charging process, charging current is instantly increased, prevents charging current from exceeding the electricity that main equipment starts OCP
Stream threshold value and lead to main equipment error starting OCP function it is ensured that quick charge process be normally carried out it is ensured that OTG function
Normal use.
The preferred embodiments of the present invention above by reference to brief description, not thereby limit to the interest field of the present invention.This
Skilled person, without departing from the scope of the present invention and essence, can have multiple flexible programs to realize the present invention, for example as one
The feature of individual embodiment can be used for another embodiment and obtains another embodiment.All institutes within the technology design with the present invention
Any modification, equivalent and the improvement made, all should be within the interest field of the present invention.
Claims (10)
1. a kind of OTG patchcord it is characterised in that include connecting line, be connected to described connecting line two ends first connection
Head and the second union joint and current limiting element, described connecting line includes ground wire and power line, and described current limiting element is series at described
On power line.
2. OTG patchcord according to claim 1 is it is characterised in that described current limiting element is resistance.
3. OTG patchcord according to claim 2 is it is characterised in that the resistance of described resistance is between 0 to 1 Europe.
4. OTG patchcord according to claim 1 is it is characterised in that described current limiting element includes an inductance.
5. OTG patchcord according to claim 4 is it is characterised in that described current limiting element also includes a backward diode,
Described backward diode and described inductance in parallel.
6. OTG patchcord according to claim 4 is it is characterised in that described current limiting element also includes a resistance, described electricity
Resistance and described inductance in parallel.
7. the OTG patchcord according to any one of claim 4-6 is it is characterised in that the D.C. resistance resistance of described inductance
Between 0 to 0.5 Europe.
8. OTG patchcord according to claim 6 it is characterised in that described resistance resistance between 50 to 150 Europe it
Between.
9. the OTG patchcord according to any one of claim 1-6 is it is characterised in that described power line is VBUS line.
10. the OTG patchcord according to any one of claim 1-6 it is characterised in that described connecting line also include ID line and
Data wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610822866.XA CN106450991A (en) | 2016-09-13 | 2016-09-13 | OTG patch cord |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610822866.XA CN106450991A (en) | 2016-09-13 | 2016-09-13 | OTG patch cord |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106450991A true CN106450991A (en) | 2017-02-22 |
Family
ID=58168175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610822866.XA Pending CN106450991A (en) | 2016-09-13 | 2016-09-13 | OTG patch cord |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106450991A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202550248U (en) * | 2011-11-23 | 2012-11-21 | 天津市天堰医教科技开发有限公司 | USB data line with overvoltage and overcurrent protection |
| EP2650752A2 (en) * | 2012-04-09 | 2013-10-16 | Huawei Device Co., Ltd. | Terminal device and power supply method for terminal device |
| EP2738642A1 (en) * | 2012-12-03 | 2014-06-04 | Samsung Electronics Co., Ltd | Method of sensing connection of usb device in power save mode and image forming apparatus for performing the same |
| CN104716428A (en) * | 2015-03-13 | 2015-06-17 | 惠州Tcl移动通信有限公司 | Antenna bandwidth expansion device and mobile terminal |
-
2016
- 2016-09-13 CN CN201610822866.XA patent/CN106450991A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202550248U (en) * | 2011-11-23 | 2012-11-21 | 天津市天堰医教科技开发有限公司 | USB data line with overvoltage and overcurrent protection |
| EP2650752A2 (en) * | 2012-04-09 | 2013-10-16 | Huawei Device Co., Ltd. | Terminal device and power supply method for terminal device |
| EP2738642A1 (en) * | 2012-12-03 | 2014-06-04 | Samsung Electronics Co., Ltd | Method of sensing connection of usb device in power save mode and image forming apparatus for performing the same |
| CN104716428A (en) * | 2015-03-13 | 2015-06-17 | 惠州Tcl移动通信有限公司 | Antenna bandwidth expansion device and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |
|
| RJ01 | Rejection of invention patent application after publication |