CN204559536U

CN204559536U - Commutation circuit and charging device

Info

Publication number: CN204559536U
Application number: CN201420866491.3U
Authority: CN
Inventors: 曾勇; 高方成; 程超会; 刘冬; 刘伦杰; 杨琪; 林振华
Original assignee: SHENZHEN GOLDWEB TECHNOLOGY Co Ltd
Current assignee: Shenzhen Hai Yun New Energy Co ltd
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2015-08-12
Anticipated expiration: 2024-12-30

Abstract

The utility model is applicable to circuit field, provides a kind of commutation circuit and charging device.Commutation circuit comprises power supply interface, access detection module and handover module; Access detection module generates interrupt signal with electronic equipment by when not being connected and being switched to electrical connection in the power pins of power supply interface; The preinstalled circuit that the data pin of power supply interface and switching signal are specified, when the switching signal triggered by interrupt signal being detected, is electrically connected by handover module; Wherein, preinstalled circuit is the telecommunication circuit for communicating with described electronic equipment, or preinstalled circuit is the voltage matches circuit for adjusting the charging voltage exported to electronic equipment.Thus electronic equipment by do not connect be switched to electrical connection time, handover module can be controlled telecommunication circuit or voltage matches circuit are electrically connected with the data pin of power supply interface, data interaction is carried out by telecommunication circuit and electronic equipment, or the voltage of the signal of telecommunication exported to electronic equipment by voltage matches control circui charging device.

Description

Commutation circuit and charging device

Technical field

The utility model belongs to circuit field, particularly relates to a kind of commutation circuit and charging device.

Background technology

Existing charging device, under the power supply interface of this charging device cooperates with the processor (such as CC3200) of this charging device, only supports charging adjusting function or only has data communication function; Such as, for TI low-power consumption scheme chip CC3200, this CC3200 chip does not have USB (Universal SerialBus, USB) interface, cannot by the compatible charging voltage adjusting function of power supply interface and data communication function.

Utility model content

The purpose of this utility model is to provide a kind of commutation circuit and charging device, controls handover module and carries out communication switching, to be realized the adjustment communication of charging voltage and the switching that communicates of data transfer communications by same power supply interface.

First aspect, the utility model provides a kind of commutation circuit, described commutation circuit comprises power supply interface, described commutation circuit also comprises access detection module and handover module, described access detection module is electrically connected with the power pins of described power supply interface, and described handover module is electrically connected with the data pin of described power supply interface;

Described access detection module generates interrupt signal with electronic equipment by when not being connected and being switched to electrical connection in the power pins of described power supply interface;

The preinstalled circuit that the data pin of described power supply interface and described switching signal are specified, when the switching signal triggered by described interrupt signal being detected, is electrically connected by described handover module;

Wherein, described preinstalled circuit is the telecommunication circuit for communicating with described electronic equipment, or described preinstalled circuit is the voltage matches circuit for adjusting the charging voltage exported to described electronic equipment.

Alternatively, described access detection module comprises current detecting unit and amplifies comparing unit, the power pins of described power supply interface, described current detecting unit and the electrical connection of amplification comparing unit;

Described current detecting unit the power pins of described power supply interface with electronic equipment by detecting the electric current exported to the power pins of described power supply interface when not being connected and being switched to electrical connection, and export the voltage differential signal corresponding with the electric current detected;

Described amplification comparing unit carries out signal amplification to described voltage differential signal and signal compares, and output signal compares the described interrupt signal of gained.

Alternatively, described handover module has the first correction data end, the first negative data end, the second correction data end, the second negative data end, the 3rd correction data end, the 3rd negative data end and controlled end; Described first correction data end and the described first negative data end correspondence of described handover module connect described voltage matches circuit, described second correction data end and the described second negative data end correspondence of described handover module connect described telecommunication circuit, and the described 3rd correction data end of described handover module and described 3rd negative data end correspondence connect the data pin of described power supply interface; Described handover module accesses described switching signal from described controlled end;

Described handover module comprises switching chip, the first resistance, the second resistance, the first diode, the first voltage stabilizing didoe, the second diode, the second voltage stabilizing didoe, the 3rd diode, the 3rd voltage stabilizing didoe, the 4th diode and the 4th voltage stabilizing didoe, wherein, first correction data pin of described switching chip and the first negative data pin correspond to described first correction data end and described first negative data end, second correction data pin of described switching chip and the second negative data pin correspond to described second correction data end and described second negative data end, second end of described first resistance and the second end of described second resistance correspond to described 3rd correction data end and described 3rd negative data end, the enable pin of described switching chip is the controlled end of described handover module, 3rd correction data pin of described switching chip and the 3rd negative data pin correspondence connect the first end of described first resistance and the first end of described second resistance, the ground pin ground connection of described switching chip, the negative electrode of described first diode connects the second end of described second resistance, the anode of described first voltage stabilizing didoe and negative electrode correspondence connect anode and the ground of described first diode, the minus earth of described second diode, the anode of described second voltage stabilizing didoe and negative electrode correspondence connect the anode of described second diode and the second end of described second resistance, the negative electrode of described 3rd diode connects the second end of described first resistance, the anode of described 3rd voltage stabilizing didoe and negative electrode correspondence connect anode and the ground of described 3rd diode, the minus earth of described 4th diode, the anode of described 4th voltage stabilizing didoe and negative electrode correspondence connect the anode of described 4th diode and the second end of described first resistance.

Alternatively, described current detecting unit has current detecting end, electronegative potential output and high-potential output end, the power pins of power supply interface described in described current detecting termination, and described electronegative potential output and described high-potential output end connect described amplification comparing unit;

Described current detecting unit comprises the first electric capacity, the 4th electric capacity, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, wherein, second end of described 4th resistance, second end of described 5th resistance and the second end of described 6th resistance correspond to the described current detecting end of described current detecting unit, described electronegative potential output and described high-potential output end, first termination first power supply of described 4th resistance, described 3rd resistance and described 4th resistor coupled in parallel, second end of the 4th resistance described in first termination of described 5th resistance, the first end of the 4th resistance described in first termination of described 6th resistance, described first electric capacity and the 7th resistor coupled in parallel are between second end and ground of described 6th resistance, described 4th Capacitance parallel connection is between the first end and the first end of described 6th resistance of the 5th resistance.

Alternatively, described amplification comparing unit has high potential input, electronegative potential input and interrupt output end, described high potential input and described electronegative potential input current detecting unit described in termination, and described amplification comparing unit exports described interrupt signal from described interrupt output end;

Described amplification comparing unit comprises the 5th diode, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the second electric capacity, the 3rd electric capacity and amplifies comparable chip; wherein, first high potential input pin of described amplification comparable chip and the first electronegative potential input pin correspond to high potential input and the electronegative potential input of described amplification comparing unit, second end of described 9th resistance is the interrupt output end of described amplification comparing unit, first output pin of described amplification comparable chip is connected with the second high potential input pin of described amplification comparable chip, described second electric capacity and described 8th resistor coupled in parallel are between first output pin and described first electronegative potential input pin of described amplification comparable chip, described tenth resistance and described 11 resistance be connected in series the second electronegative potential input pin a little connecing described amplification comparable chip, described tenth resistance and described 11 resistant series are between the first VDD-to-VSS, the power pins of described amplification comparable chip connects the first power supply, the second output pin of comparable chip is amplified described in first termination of described 9th resistance, described 3rd electric capacity and described 12 resistor coupled in parallel are between second end and ground of described 9th resistance, described 5th diode is connected between the second end of second source and described 9th resistance.

Second aspect, the utility model provides a kind of charging device, described charging device comprises commutation circuit, described commutation circuit comprises power supply interface, described commutation circuit also comprises access detection module and handover module, described access detection module is electrically connected with the power pins of described power supply interface, and described handover module is electrically connected with the data pin of described power supply interface;

The beneficial effects of the utility model: add handover module in charging device, electronic equipment by do not connect be switched to electrical connection time, this handover module can be controlled telecommunication circuit or voltage matches circuit are electrically connected with the data pin of power supply interface; Data interaction is carried out by this telecommunication circuit and electronic equipment, or the voltage of the signal of telecommunication exported to electronic equipment by voltage matches control circui charging device.

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the composition structure chart of the commutation circuit that the utility model embodiment provides;

Fig. 2 is the one optimization composition structure chart of the commutation circuit that the utility model embodiment provides;

Fig. 3 is a kind of physical circuit figure of the commutation circuit that the utility model embodiment provides.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In order to technical scheme described in the utility model is described, be described below by specific embodiment.

It should be noted that, the charging device described in the utility model embodiment, this charging device has power supply interface.It should be noted that, the power supply interface that this charging device has can be one or more; For each power supply interface, after the charging inlet grafting of this power supply interface and electronic equipment, the power pins of this power supply interface is electrically connected with the power pins of the charging inlet of electronic equipment, thus this charging device exports the signal of telecommunication by the power pins of its power supply interface, by this signal of telecommunication to power electronic equipment and/or be that battery core in electronic equipment is charged.

In addition, under the state of the power supply interface of this charging device and the charging inlet grafting of electronic equipment, the data pin of this power supply interface is electrically connected with the data pin of charging inlet, thus charging device carries out data interaction by its data pin and electronic equipment.

It should be noted that, this charging device has telecommunication circuit; Wherein, this telecommunication circuit is used for: set up and the communication connection of electronic equipment, after treating successfully to establish a communications link, by this communication connection and electronic device data mutual; Wherein, the data that this telecommunication circuit can be mutual with electronic equipment comprise current data, sensing data, file etc., and the utility model embodiment does not limit.

As the utility model embodiment one execution mode, can this telecommunication circuit can and electronic equipment between the communication connection of setting up comprise: based on the communication connection of I2C (Inter-Integrated Circuit) agreement.

It should be noted that, for this charging device, also to there is processor module; After communication connection set up by this telecommunication circuit and electronic equipment, this processor module receives the data of electronic equipment transmission by this telecommunication circuit, and this processor module also sends data by this telecommunication circuit to electronic equipment.Wherein, for the processor module in charging device, electronic device design can be adopted to go out, the processor chips with data-handling capacity can also be adopted to realize; Can according to user's request, programme to realize various function to this processor module, this processor module can be performed: export the data meeting form needed for telecommunication circuit to telecommunication circuit, or parse correct data from the formatted data of tool that telecommunication circuit receives.

Alternatively, this processor module adopts single-chip microcomputer, arm processor, programmable logic device etc. to have chip or the electronic circuit realization of data processing function.As the utility model one execution mode, processor module employing model is that the processor chips of CC3200 realize.

It should be noted that, this charging device also has voltage matches circuit; Wherein, voltage matches circuit is used for: in the process that charging device is charged to the battery core of electronic equipment by its power pins, the Voltage Cortrol instruction that electronic equipment sends can be received, the voltage (i.e. charging voltage) of the signal of telecommunication that adjustment charging device exports to electronic equipment.

In order to realize the data pin of charging device by this power supply interface be electrically connected with this telecommunication circuit or be electrically connected with this voltage matches circuit between switching, the utility model embodiment with the addition of commutation circuit in charging device.

The described commutation circuit that theres is provided of the utility model embodiment for convenience of description, Fig. 1 shows the composition structure of the commutation circuit that the utility model embodiment provides, but Fig. 1 illustrate only the part relevant to the utility model embodiment.

As shown in Figure 1, the commutation circuit that the utility model embodiment provides comprises above-mentioned power supply interface.

What deserves to be explained is, described commutation circuit also comprises access detection module 11 and handover module 12, and described access detection module 11 is electrically connected with the power pins of described power supply interface, and described handover module 12 is electrically connected with the data pin of described power supply interface.

Particularly, because described access detection module 11 is electrically connected with the power pins of described power supply interface, described access detection module 11 can detect the change of the signal of telecommunication in the power pins of this power supply interface in real time; Illustrate, described access detection module 11 can detect the voltage of the signal of telecommunication in the power pins of this power supply interface; Illustrate, described access detection module 11 can detect the electric current of the signal of telecommunication flow through in the power pins of this power supply interface again.

During the charging inlet grafting not with electronic equipment of the power supply interface of charging device, the power pins of the power supply interface of charging device is not electrically connected with the power pins of the charging inlet of electronic equipment, and described access detection module 11 is constant from the signal of telecommunication that the power pins of this power supply interface detects substantially.During the charging inlet grafting of the power supply interface of charging device and electronic equipment, the power pins of the power supply interface of charging device is electrically connected with the power pins of the charging inlet of electronic equipment, charging device is charged to power electronic equipment and/or to the battery core of electronic equipment by the power pins of its power supply interface, and the power pins of the power supply interface of this charging device can exist electric current; The signal of telecommunication detected when the charging inlet grafting not with electronic equipment of the power supply interface of charging device relative to described access detection module 11, the signal of telecommunication that described access detection module 11 detects from the power pins of this power supply interface when the charging inlet grafting of the power supply interface of charging device and electronic equipment has greatly changed.

In the utility model embodiment, described access detection module 11 generates interrupt signal with electronic equipment by when not being connected and being switched to electrical connection in the power pins of described power supply interface.

Particularly, relative to the signal of telecommunication detected from the power pins of this power supply interface when the charging inlet grafting not with electronic equipment of the power supply interface of charging device, the signal of telecommunication that described access detection module 11 detects from the power pins of this power supply interface when the charging inlet grafting of the power supply interface of charging device and electronic equipment has greatly changed; Therefore, the power supply interface of charging device and the charging inlet of electronic equipment never grafting are transformed in the process of grafting, described access detection module 11 detects the signal of telecommunication of change from the power pins of this power supply interface, described access detection module 11, when the signal of telecommunication of this change being detected, generates interrupt signal.

As the utility model embodiment one execution mode, processor module, when this interrupt signal that described access detection module 11 generates being detected, generates switching signal according to the switch mode preset.

As the utility model embodiment one execution mode, electronic equipment also comprises circuits for triggering, and this trigger, when this interrupt signal that described access detection module 11 generates being detected, generates switching signal according to the switch mode preset.Wherein, present embodiment does not limit which kind of electronic device composition circuits for triggering of employing, does not limit the operation principle of these circuits for triggering.Preferably, described circuits for triggering adopt trigger and peripheral circuit composition.

It should be noted that, the above-mentioned switch mode preset at least can comprise following four kinds:

The first, under default situations, handover module 12 is electrically connected with this voltage matches circuit 13, once detect that this interrupt signal generates for described handover module 12 being switched to the switching signal be electrically connected with this telecommunication circuit 14.

The second, under default situations, handover module 12 is electrically connected with this telecommunication circuit 14, once detect that this interrupt signal generates for described handover module 12 being switched to the switching signal be electrically connected with this voltage matches circuit 13.

The third, no matter when this interrupt signal being detected, handover module 12 with which preinstalled circuit (comprising this voltage matches circuit 13 and this telecommunication circuit 14) be electrically connected, once the switching signal of this interrupt signal generation for being electrically connected with this telecommunication circuit 14 by described handover module 12 be detected.

4th kind, no matter when this interrupt signal being detected, handover module 12 with which preinstalled circuit (comprising this voltage matches circuit 13 and this telecommunication circuit 14) be electrically connected, once the switching signal of this interrupt signal generation for being electrically connected with this voltage matches circuit 13 by described handover module 12 be detected.

As the utility model one execution mode, first the switching signal of specifying this telecommunication circuit 14 is generated after this interrupt signal that described access detection module 11 generates being detected, this telecommunication circuit 14 is electrically connected with the data pin of power supply interface by handover module 12, and telecommunication circuit 14 adopts handshake method and electronic equipment to establish a communications link (such as based on the communication connection of I2C agreement); Set up this communication connection if unsuccessful, then generate the switching signal performing this voltage matches circuit 13, voltage matches circuit 13 is electrically connected with the data pin of power supply interface; If successfully set up this communication connection, then this telecommunication circuit 14 is kept to be electrically connected with the data pin of power supply interface.

Accordingly, in the utility model embodiment, the preinstalled circuit that the data pin of described power supply interface and described switching signal are specified, when the switching signal triggered by described interrupt signal being detected, is electrically connected by described handover module 12; Wherein, described preinstalled circuit is the telecommunication circuit 14 for communicating with described electronic equipment, or described preinstalled circuit is the voltage matches circuit 13 for adjusting the charging voltage exported to described electronic equipment.

It should be noted that, described handover module 12 for: according to switching signal, the preinstalled circuit of specifying with described switching signal is electrically connected, and the preinstalled circuit that the data pin of the power supply interface of charging device and described switching signal are specified is electrically connected.The utility model embodiment forms this handover module 12 to which kind of electronic device of employing and does not limit, and does not limit the operation principle of this handover module 12.

As the utility model embodiment one execution mode, if the power supply interface of power supply unit has two single data pins (comprising data pin U_D+, data pin U_D-), the double-point double-throw switch adopting electricity controlled is as this handover module 12.

When switching signal designated communication circuit 14, handover module 12, when receiving this switching signal, controls this double-point double-throw switch and this telecommunication circuit 14 is electrically connected respectively with the two single data pins (comprising data pin U_D+, data pin U_D-) of this power supply interface; And then telecommunication circuit 14 establishes a communications link by this two single data pin (comprising data pin U_D+, data pin U_D-) and electronic equipment, the data interaction with electronic equipment is carried out in the communication connection of setting up based on success.

When switching signal given voltage match circuit 13, handover module 12, when receiving this switching signal, controls this double-point double-throw switch and is electrically connected respectively with the two single data pins (comprising data pin U_D+, data pin U_D-) of this power supply interface by this voltage matches circuit 13; And then pass through its power pins in the process of the battery core charging in electronic equipment at charging device, voltage matches circuit 13 receives the Voltage Cortrol instruction of electronic equipment transmission by this two single data pin (comprising data pin U_D+, data pin U_D-), controls the voltage (i.e. charging voltage) of the signal of telecommunication that charging device is exported to electronic equipment by its power pins.

Preferably, the signal of telecommunication exporting predeterminated voltage only supported by charging device, and this predeterminated voltage comprises 5V, 9V and 12V; When voltage matches circuit 13 receives the Voltage Cortrol instruction of electronic equipment transmission by this two single data pin (comprising data pin U_D+, data pin U_D-), if the voltage that this Voltage Cortrol instruction is specified is any one this predeterminated voltage, voltage matches circuit 13 controls charging device and exports to electronic equipment the voltage that described Voltage Cortrol instruction specifies by its power pins; If the voltage that this Voltage Cortrol instruction is specified is not any one this predeterminated voltage, voltage matches circuit 13 controls charging device and exports default voltage (such as 5V) by its power pins to electronic equipment, can to or do not support the response of the voltage that Voltage Cortrol instruction is specified to electronic equipment feedback.

Fig. 2 shows the one optimization composition structure of the commutation circuit that the utility model embodiment provides, but illustrate only the part relevant to the utility model embodiment.

As an execution mode of the utility model embodiment, see Fig. 2, described access detection module 11 comprises current detecting unit 111 and amplifies comparing unit 112, power pins, the described current detecting unit 111 of described power supply interface and amplify comparing unit 112 and be electrically connected.

Current detecting unit 111 as shown in Figure 2, described current detecting unit 111 the power pins of described power supply interface with electronic equipment by detecting the electric current exported to the power pins of described power supply interface when not being connected and being switched to electrical connection, and export the voltage differential signal corresponding with the electric current detected.

Particularly, during the charging inlet grafting not with electronic equipment of the power supply interface of charging device, the power pins of the power supply interface of charging device is not electrically connected with the power pins of the charging inlet of electronic equipment, and the power pins of this power supply interface does not exist electric current; During the charging inlet grafting of the power supply interface of charging device and electronic equipment, the power pins of the power supply interface of charging device is electrically connected with the power pins of the charging inlet of electronic equipment, charging device is by its power pins to power electronic equipment and/or to the battery core charging in electronic equipment, and the power pins of this power supply interface does not exist electric current.

In present embodiment, by whether the real-time power pins detecting this power supply interface of current detecting unit 111 exists electric current, the size of current of existence; The current conversion that power pins from this power supply interface detects is become voltage difference and formation voltage difference signal by current detecting unit 111.

It should be noted that, present embodiment does not limit which kind of electronic device composition current detecting unit 111 of employing, does not limit the operation principle of this current detecting unit 111.Preferably, the current conversion detected also is become voltage difference by the electric current that current detecting unit 111 is detected from the power pins of this power supply interface by resistance detection, and obtains voltage differential signal.

Amplification comparing unit 112 as shown in Figure 2, described amplification comparing unit 112 carries out signal amplification to described voltage differential signal and signal compares, and output signal compares the described interrupt signal of gained.

It should be noted that, amplify comparing unit 112 and include reference signal circuit, this reference signal circuit is used for: generate reference voltage difference signal.

In the present embodiment, first described amplification comparing unit 112 carries out signal amplification to the voltage differential signal that this current detecting unit 111 exports; For the multiplication factor that this signal amplifies, do not limit at this, can set according to embody rule occasion.

Then, the voltage differential signal after signal amplifies by amplification comparing unit 112 carries out signal with the reference voltage difference signal that this reference signal circuit exports and compares, and should draw an analogy the signal of telecommunication comparing gained compared with circuit output signal, this signal of telecommunication is loaded with signal comparative result.

Illustrate, the power supply interface of charging device and the charging inlet of electronic equipment never grafting are transformed in the process of grafting, and described current detecting unit 111 detects the electric current of change from the power pins of this power supply interface and changes out the voltage differential signal of change; Thus, described amplification comparing unit 112 carries out to the voltage differential signal of this change the signal of telecommunication that signal amplification and reference voltage difference signal carry out obtaining after signal compares carrying vicissitudinous comparative result, and the signal of telecommunication of this year vicissitudinous comparative result is the interrupt signal described in the utility model embodiment.Such as, when the power supply interface of charging device and the non-grafting of the charging inlet of electronic equipment, the amplitude of the signal of telecommunication after signal amplifies is less than the amplitude of this reference voltage difference signal, exports the signal of telecommunication that comparative result is " 0 "; When the charging inlet grafting of the power supply interface of charging device and electronic equipment, the amplitude of the signal of telecommunication after signal amplifies is greater than the amplitude of this reference voltage difference signal, exports the signal of telecommunication that comparative result is " 1 "; Therefore, the power supply interface of charging device and the charging inlet of electronic equipment never grafting are transformed in the process of grafting, the signal of telecommunication of the comparative result (being become " 1 " from " 0 ") of exporting change.

It should be noted that, present embodiment forms this amplification comparing unit 112 to which kind of electronic device of employing and does not limit, and does not limit the operation principle of this amplification comparing unit 112.Alternatively, amplifier is adopted to carry out signal amplification to described voltage differential signal, described voltage differential signal after adopting comparator (such as amplifier comparator) to be amplified by signal and reference voltage difference signal compare, and export the signal of telecommunication being loaded with comparative result.

Fig. 3 shows a kind of physical circuit figure of the commutation circuit that the utility model embodiment provides, but illustrate only the part relevant to the utility model embodiment.

As an execution mode of the utility model embodiment, see Fig. 3, power supply interface adopts power supply chip U1 to realize, and power supply chip U1 has power pins U_VCC, correction data pin U_D+, negative data pin U_D-and ground pin GND; Wherein, the ground pin GND ground connection of this power supply chip U1, the power pins U_VCC of this power supply chip U1 is the power pins of described power supply interface, and correction data pin U_D+ and the negative data pin U_D-of this power supply chip U1 are the data pin of this power supply interface; Preferably, the correction data pin U_D+ of this power supply chip U1 and negative data pin U_D-is two single data pins of this power supply interface.

As an execution mode of the utility model embodiment, see Fig. 3, described handover module 12 has the first correction data end, the first negative data end, the second correction data end, the second negative data end, the 3rd correction data end, the 3rd negative data end and controlled end CTL; Described first correction data end and the described first negative data end correspondence of described handover module 12 connect described voltage matches circuit 13, described second correction data end and the described second negative data end correspondence of described handover module 12 connect described telecommunication circuit 14, and the described 3rd correction data end of described handover module 12 and described 3rd negative data end correspondence connect the data pin of described power supply interface; Described handover module 12 accesses described switching signal from described controlled end CTL.Illustrate, the 3rd correction data end of described handover module 12 and the 3rd negative data end correspondence meet correction data pin U_D+ and the negative data pin U_D-of this power supply chip U1.

See Fig. 3, described handover module 12 comprises switching chip U3, the first resistance R1, the second resistance R2, the first diode D1, the first voltage stabilizing didoe D2, the second diode D3, the second voltage stabilizing didoe D4, the 3rd diode D5, the 3rd voltage stabilizing didoe D6, the 4th diode D7 and the 4th voltage stabilizing didoe D8; wherein, the first correction data pin D1+ of described switching chip U3 and the first negative data pin D1-corresponds to described first correction data end and described first negative data end, the second correction data pin D2+ of described switching chip U3 and the second negative data pin D2-corresponds to described second correction data end and described second negative data end, second end of described first resistance R1 and second end of described second resistance R2 correspond to described 3rd correction data end and described 3rd negative data end, the enable pin EN of described switching chip U3 is the controlled end CTL of described handover module 12, the 3rd correction data pin D3+ of described switching chip U3 and the 3rd negative data pin D3-correspondence connects the first end of described first resistance R1 and the first end of described second resistance R2, the ground pin GND ground connection of described switching chip U3, the negative electrode of described first diode D1 connects second end of described second resistance R2, the anode of described first voltage stabilizing didoe D2 and negative electrode correspondence connect anode and the ground of described first diode D1, the minus earth of described second diode D3, the anode of described second voltage stabilizing didoe D4 and negative electrode correspondence connect the anode of described second diode D3 and second end of described second resistance R2, the negative electrode of described 3rd diode D5 connects second end of described first resistance R1, the anode of described 3rd voltage stabilizing didoe D6 and negative electrode correspondence connect anode and the ground of described 3rd diode D5, the minus earth of described 4th diode D7, the anode of described 4th voltage stabilizing didoe D8 and negative electrode correspondence connect the anode of described 4th diode D7 and second end of described first resistance R1.

The operation principle of the handover module 12 described in Fig. 3 is: if described switching signal designated communication circuit 14, then when described switching chip U3 receives this switching signal from enable pin EN, switch chip U3 and the second correction data pin D2+ is met the 3rd correction data pin D3+, switch chip U3 and the second negative data pin D2-is met three negative data pin D3-.Thus telecommunication circuit 14 establishes a communications link with electronic equipment by the data pin (comprising data pin U_D+, data pin U_D-) of power supply interface, and the data interaction with electronic equipment is carried out in the communication connection of setting up based on success.

If described switching signal given voltage match circuit 13, then when described switching chip U3 receives this switching signal from enable pin EN, switch chip U3 and the first correction data pin D1+ is met the 3rd correction data pin D3+, switch chip U3 and the first negative data pin D1-is met three negative data pin D3-.And then pass through its power pins in the process of the battery core charging in electronic equipment at charging device, voltage matches circuit 13 receives by the two single data pins (comprising data pin U_D+, data pin U_D-) of power supply interface the Voltage Cortrol instruction that electronic equipment sends, and controls the voltage (i.e. charging voltage) of the signal of telecommunication that charging device is exported to electronic equipment by its power pins.

As an execution mode of the utility model embodiment, see Fig. 3, described current detecting unit 111 has current detecting end, electronegative potential output and high-potential output end, the power pins of power supply interface described in described current detecting termination, described electronegative potential output and described high-potential output end connect described amplification comparing unit 112.Illustrate, the current detecting end of described current detecting unit 111 has power pins U_VCC with power supply chip U1 and is electrically connected.

See Fig. 3, described current detecting unit 111 comprises the first electric capacity C1, the 4th electric capacity C4, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, wherein, second end of described 4th resistance R4, second end of described 5th resistance R5 and second end of described 6th resistance R6 correspond to the described current detecting end of described current detecting unit 111, described electronegative potential output and described high-potential output end, the first termination first power supply VCC1 of described 4th resistance R4, described 3rd resistance R3 is in parallel with described 4th resistance R4, second end of the 4th resistance R4 described in first termination of described 5th resistance R5, the first end of the 4th resistance R4 described in first termination of described 6th resistance R6, between the second end that described first electric capacity C1 and the 7th resistance R7 is connected in parallel on described 6th resistance R6 and ground, described 4th electric capacity C4 is connected in parallel between the first end of the 5th resistance R5 and the first end of described 6th resistance R6.

The operation principle of the current detecting unit 111 shown in Fig. 3 is: the 3rd resistance R3 and described 4th resistance R4 is connected in parallel between the first power supply VCC1 and the power pins of power supply interface, the electric current flowing through the power pins of this power supply interface is detected by the 3rd resistance R3 of parallel connection and described 4th resistance R4, the current conversion detected is voltage difference and obtains voltage differential signal, this voltage differential signal exports this voltage differential signal from the electronegative potential output of current detecting unit 111 and high-potential output end after the 5th resistance R5 and the 6th resistance R6.

As an execution mode of the utility model embodiment, see Fig. 3, described amplification comparing unit 112 has high potential input, electronegative potential input and interrupt output end S_OUT, described high potential input and described electronegative potential input current detecting unit 111 described in termination, and described amplification comparing unit 112 exports described interrupt signal from described interrupt output end S_OUT;

See Fig. 3, described amplification comparing unit 112 comprises the 5th diode D5, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the second electric capacity C2, the 3rd electric capacity C3 and amplifies comparable chip U2; wherein, the first high potential input pin IN1+ of described amplification comparable chip U2 and the first electronegative potential input pin IN1-corresponds to high potential input and the electronegative potential input of described amplification comparing unit 112, second end of described 9th resistance R9 is the interrupt output end S_OUT of described amplification comparing unit 112, the first output pin OUT1 of described amplification comparable chip U2 is connected with the second high potential input pin IN2+ of described amplification comparable chip U2, described second electric capacity C2 and described 8th resistance R8 is connected in parallel between the first output pin OUT1 of described amplification comparable chip U2 and described first electronegative potential input pin IN1-, described tenth resistance R10 and described 11 resistance R11 is connected in series the second electronegative potential input pin IN2-a little meeting described amplification comparable chip U2, described tenth resistance R10 and described 11 resistance R11 is connected between the first power supply VCC1 and ground, the power pins VDD of described amplification comparable chip U2 meets the first power supply VCC1, the ground pin VSS ground connection of described amplification comparable chip U2, the second output pin OUT2 of comparable chip U2 is amplified described in first termination of described 9th resistance R9, between the second end that described 3rd electric capacity C3 and described 12 resistance R12 is connected in parallel on described 9th resistance R9 and ground, described 5th diode D5 is connected between second end of second source VCC2 and described 9th resistance R9.

The operation principle of amplification comparing unit 112 is as shown in Figure 3: amplify comparing unit 112 accesses the output of described current detecting unit 111 voltage differential signal from described high potential input and described electronegative potential input, amplify comparable chip U2 and first signal amplification is carried out to this voltage differential signal, and output signal this voltage differential signal after amplifying from the first output pin OUT1, then, amplify comparable chip U2 and access this voltage differential signal exported from the first output pin OUT1 from the second high potential input pin IN2+, reference voltage difference signal is accessed from the second electronegative potential input pin IN2-, carry out signal to this voltage differential signal accessed from the first output pin OUT1 with the reference voltage difference signal accessed from the second electronegative potential input pin IN2-to compare, and the signal of telecommunication being loaded with comparative result is exported from the second output pin OUT2, the signal of telecommunication of comparative result is loaded with described in finally exporting from described amplification comparing unit 112 from described interrupt output end S_OUT.Wherein, this reference voltage difference signal is the voltage be connected in series a little stating the tenth resistance R10 and described 11 resistance R11.

Illustrate, when the power supply interface of charging device and the non-grafting of the charging inlet of electronic equipment, the amplitude of the signal of telecommunication after signal amplifies is less than the amplitude of this reference voltage difference signal, exports the signal of telecommunication that comparative result is " 0 "; When the charging inlet grafting of the power supply interface of charging device and electronic equipment, the amplitude of the signal of telecommunication after signal amplifies is greater than the amplitude of this reference voltage difference signal, exports the signal of telecommunication that comparative result is " 1 "; Therefore, the power supply interface of charging device and the charging inlet of electronic equipment never grafting are transformed in the process of grafting, the signal of telecommunication (interrupt signal namely described in the utility model embodiment) of the comparative result (being become " 1 " from " 0 ") of exporting change.

It should be noted that, the commutation circuit that the utility model embodiment provides is applicable to the charging device that the utility model embodiment provides.

The utility model embodiment also provides a kind of charging device, described charging device comprises commutation circuit, described commutation circuit comprises power supply interface, described commutation circuit also comprises access detection module and handover module, described access detection module is electrically connected with the power pins of described power supply interface, and described handover module is electrically connected with the data pin of described power supply interface;

As the utility model embodiment one execution mode, described access detection module comprises current detecting unit and amplifies comparing unit, the power pins of described power supply interface, described current detecting unit and the electrical connection of amplification comparing unit;

As the utility model embodiment one execution mode, described handover module has the first correction data end, the first negative data end, the second correction data end, the second negative data end, the 3rd correction data end, the 3rd negative data end and controlled end CTL; Described first correction data end and the described first negative data end correspondence of described handover module connect described voltage matches circuit, described second correction data end and the described second negative data end correspondence of described handover module connect described telecommunication circuit, and the described 3rd correction data end of described handover module and described 3rd negative data end correspondence connect the data pin of described power supply interface; Described handover module accesses described switching signal from described controlled end CTL;

Described handover module comprises switching chip U3, the first resistance R1, the second resistance R2, the first diode D1, the first voltage stabilizing didoe D2, the second diode D3, the second voltage stabilizing didoe D4, the 3rd diode D5, the 3rd voltage stabilizing didoe D6, the 4th diode D7 and the 4th voltage stabilizing didoe D8; wherein, the first correction data pin D1+ of described switching chip U3 and the first negative data pin D1-corresponds to described first correction data end and described first negative data end, the second correction data pin D2+ of described switching chip U3 and the second negative data pin D2-corresponds to described second correction data end and described second negative data end, second end of described first resistance R1 and second end of described second resistance R2 correspond to described 3rd correction data end and described 3rd negative data end, the enable pin EN of described switching chip U3 is the controlled end CTL of described handover module, the 3rd correction data pin D3+ of described switching chip U3 and the 3rd negative data pin D3-correspondence connects the first end of described first resistance R1 and the first end of described second resistance R2, the ground pin ground connection of described switching chip U3, the negative electrode of described first diode D1 connects second end of described second resistance R2, the anode of described first voltage stabilizing didoe D2 and negative electrode correspondence connect anode and the ground of described first diode D1, the minus earth of described second diode D3, the anode of described second voltage stabilizing didoe D4 and negative electrode correspondence connect the anode of described second diode D3 and second end of described second resistance R2, the negative electrode of described 3rd diode D5 connects second end of described first resistance R1, the anode of described 3rd voltage stabilizing didoe D6 and negative electrode correspondence connect anode and the ground of described 3rd diode D5, the minus earth of described 4th diode D7, the anode of described 4th voltage stabilizing didoe D8 and negative electrode correspondence connect the anode of described 4th diode D7 and second end of described first resistance R1.

As the utility model embodiment one execution mode, described current detecting unit has current detecting end, electronegative potential output and high-potential output end, the power pins of power supply interface described in described current detecting termination, described electronegative potential output and described high-potential output end connect described amplification comparing unit;

Described current detecting unit comprises the first electric capacity C1, the 4th electric capacity C4, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, wherein, second end of described 4th resistance R4, second end of described 5th resistance R5 and second end of described 6th resistance R6 correspond to the described current detecting end of described current detecting unit, described electronegative potential output and described high-potential output end, the first termination first power supply VCC1 of described 4th resistance R4, described 3rd resistance R3 is in parallel with described 4th resistance R4, second end of the 4th resistance R4 described in first termination of described 5th resistance R5, the first end of the 4th resistance R4 described in first termination of described 6th resistance R6, between the second end that described first electric capacity C1 and the 7th resistance R7 is connected in parallel on described 6th resistance R6 and ground, described 4th electric capacity C4 is connected in parallel between the first end of the 5th resistance R5 and the first end of described 6th resistance R6.

As the utility model embodiment one execution mode, described amplification comparing unit has high potential input, electronegative potential input and interrupt output end S_OUT, described high potential input and described electronegative potential input current detecting unit described in termination, and described amplification comparing unit exports described interrupt signal from described interrupt output end S_OUT;

Described amplification comparing unit comprises the 5th diode D5, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, the 12 resistance R12, the second electric capacity C2, the 3rd electric capacity C3 and amplifies comparable chip U2; wherein, the first high potential input pin IN1+ of described amplification comparable chip U2 and the first electronegative potential input pin IN1-corresponds to high potential input and the electronegative potential input of described amplification comparing unit, second end of described 9th resistance R9 is the interrupt output end S_OUT of described amplification comparing unit, the first output pin OUT1 of described amplification comparable chip U2 is connected with the second high potential input pin IN2+ of described amplification comparable chip U2, described second electric capacity C2 and described 8th resistance R8 is connected in parallel between the first output pin OUT1 of described amplification comparable chip U2 and described first electronegative potential input pin IN1-, described tenth resistance R10 and described 11 resistance R11 is connected in series the second electronegative potential input pin IN2-a little meeting described amplification comparable chip U2, described tenth resistance R10 and described 11 resistance R11 is connected between the first power supply VCC1 and ground, the power pins of described amplification comparable chip U2 meets the first power supply VCC1, the second output pin OUT2 of comparable chip U2 is amplified described in first termination of described 9th resistance R9, between the second end that described 3rd electric capacity C3 and described 12 resistance R12 is connected in parallel on described 9th resistance R9 and ground, described 5th diode D5 is connected between second end of second source VCC2 and described 9th resistance R9.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; make some equivalent alternative or obvious modification without departing from the concept of the premise utility; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the utility model is determined by submitted to claims.

Claims

1. a commutation circuit, described commutation circuit comprises power supply interface, it is characterized in that, described commutation circuit also comprises access detection module and handover module, described access detection module is electrically connected with the power pins of described power supply interface, and described handover module is electrically connected with the data pin of described power supply interface;

2. commutation circuit as claimed in claim 1, is characterized in that, described access detection module comprises current detecting unit and amplifies comparing unit, the power pins of described power supply interface, described current detecting unit and the electrical connection of amplification comparing unit;

3. commutation circuit as claimed in claim 1, it is characterized in that, described handover module has the first correction data end, the first negative data end, the second correction data end, the second negative data end, the 3rd correction data end, the 3rd negative data end and controlled end; Described first correction data end and the described first negative data end correspondence of described handover module connect described voltage matches circuit, described second correction data end and the described second negative data end correspondence of described handover module connect described telecommunication circuit, and the described 3rd correction data end of described handover module and described 3rd negative data end correspondence connect the data pin of described power supply interface; Described handover module accesses described switching signal from described controlled end;

4. commutation circuit as claimed in claim 2, it is characterized in that, described current detecting unit has current detecting end, electronegative potential output and high-potential output end, the power pins of power supply interface described in described current detecting termination, described electronegative potential output and described high-potential output end connect described amplification comparing unit;

5. the commutation circuit as described in claim 2 or 4, it is characterized in that, described amplification comparing unit has high potential input, electronegative potential input and interrupt output end, described high potential input and described electronegative potential input current detecting unit described in termination, and described amplification comparing unit exports described interrupt signal from described interrupt output end;

6. a charging device, described charging device comprises commutation circuit, described commutation circuit comprises power supply interface, it is characterized in that, described commutation circuit also comprises access detection module and handover module, described access detection module is electrically connected with the power pins of described power supply interface, and described handover module is electrically connected with the data pin of described power supply interface;

7. charging device as claimed in claim 6, is characterized in that, described access detection module comprises current detecting unit and amplifies comparing unit, the power pins of described power supply interface, described current detecting unit and the electrical connection of amplification comparing unit;

8. charging device as claimed in claim 6, it is characterized in that, described handover module has the first correction data end, the first negative data end, the second correction data end, the second negative data end, the 3rd correction data end, the 3rd negative data end and controlled end; Described first correction data end and the described first negative data end correspondence of described handover module connect described voltage matches circuit, described second correction data end and the described second negative data end correspondence of described handover module connect described telecommunication circuit, and the described 3rd correction data end of described handover module and described 3rd negative data end correspondence connect the data pin of described power supply interface; Described handover module accesses described switching signal from described controlled end;

9. charging device as claimed in claim 7, it is characterized in that, described current detecting unit has current detecting end, electronegative potential output and high-potential output end, the power pins of power supply interface described in described current detecting termination, described electronegative potential output and described high-potential output end connect described amplification comparing unit;

10. the charging device as described in claim 7 or 9, it is characterized in that, described amplification comparing unit has high potential input, electronegative potential input and interrupt output end, described high potential input and described electronegative potential input current detecting unit described in termination, and described amplification comparing unit exports described interrupt signal from described interrupt output end;