CN104917267B - The two-in-one charging circuit of compatible MTK and QC2.0 charging schemes - Google Patents

The two-in-one charging circuit of compatible MTK and QC2.0 charging schemes Download PDF

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Publication number
CN104917267B
CN104917267B CN201510306842.4A CN201510306842A CN104917267B CN 104917267 B CN104917267 B CN 104917267B CN 201510306842 A CN201510306842 A CN 201510306842A CN 104917267 B CN104917267 B CN 104917267B
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module
charging
output
mtk
connected
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CN201510306842.4A
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CN104917267A (en
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卓彦宏
毛燦豪
王令彬
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凤冠电机(深圳)有限公司
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Abstract

The present invention discloses a kind of two-in-one charging circuit of compatible MTK and QC2.0 charging schemes, including the EMI processing being sequentially connected electrically and rectification filtering module, high frequency transformer, output rectification filter module and USB port module;USB port module is connected with QC2.0 charging scheme recognition detection modules, the feedback winding of high frequency transformer is connected with MTK charging scheme recognition detection modules, the output end of QC2.0 charging scheme recognition detection modules and MTK charging scheme recognition detection modules is connected with charging output control module, and charging output control module is electrically connected with high frequency transformer;The charging scheme of mobile phone is detected by corresponding detection module, testing result feeds back to charging output control module, the voltage output of high frequency transformer is controlled by charging output control module, so as to obtain the charging voltage for being adapted to charging scheme in USB port module;The present invention can adapt to two kinds of charging schemes, highly versatile automatically.

Description

The two-in-one charging circuit of compatible MTK and QC2.0 charging schemes

Technical field

Filled soon the present invention relates to rapid nitriding field, more particularly to a kind of compatible MTK and QC2.0 charging schemes mobile phone Circuit.

Background technology

In the prior art, the quick charge scheme of mobile phone mainly has two kinds, and a kind of is MediaTek Inc MTK charging schemes, another is the QC2.0 charging schemes of Qualcomm, and both charging schemes are to charger output voltage It is required that it is different, it is necessary to different charging circuit, so can not be shared using the charger for mobile phone of two kinds of charging schemes, in intelligent hand Under the present situation of machine popularization, charger, which can not be shared, brings certain difficulty to daily life.

The content of the invention

The technical problems to be solved by the invention be to provide a kind of highly versatile, suitable for USB charge compatible MTK and The two-in-one charging circuit of QC2.0 charging schemes.

In order to solve the above technical problems, the technical scheme is that:Compatible MTK and QC2.0 charging schemes it is two-in-one Charging circuit, including input the EMI being connected processing and rectification filtering module, the EMI processing and rectification filtering module with civil power Output end electrically connected with the input of high frequency transformer, the output end of the high frequency transformer is electrically connected with output rectification filter Module, the output end of the output rectification filter module is connected with USB port module;

QC2.0 charging scheme recognition detections are connected between the USB port module and the output rectification filter module Module, the feedback winding of the high frequency transformer is connected with MTK charging scheme recognition detection modules, the QC2.0 charging schemes The output end of recognition detection module and the MTK charging schemes recognition detection module is connected with charging output control module, described Charging output control module is electrically connected with the high frequency transformer.

As a kind of perferred technical scheme, the QC2.0 charging schemes recognition detection module includes and the USB port The USB charging port D+ D- signals combination detection module of module electrical connection, the USB charging ports D+ D- signal combine detections The output end of module is electrically connected with MTK and QC2.0 automatic switching modules, and the output end of the output rectification filter module is connected with Output sampling and error amplification module, the MTK and QC2.0 automatic switching modules output end and the output sampling and error Amplification module is connected, and the output end of the output sampling and error amplification module passes through optical coupling module and the charging output control Module is electrically connected.

As a kind of perferred technical scheme, the MTK charging schemes recognition detection module includes and the high frequency transformation The output end of the output detection of the feedback winding electrical connection of device and MTK identification modules, output detection and MTK identification modules with The charging output control module connection.

As a kind of perferred technical scheme, the charging output control module includes PWM controller, the PWM controls The output end of device is connected with switching tube, and the switching tube is electrically connected with the high frequency transformer.

The two-in-one charging circuit of compatible MTK and QC2.0 charging schemes, including with civil power input the EMI that be connected handle and Rectification filtering module, the EMI processing and the output end of rectification filtering module are electrically connected with the input of high frequency transformer, described The output end of high frequency transformer is electrically connected with output rectification filter module, and the output end of the output rectification filter module is connected with USB port module;

QC2.0 charging scheme recognition detections are connected between the USB port module and the output rectification filter module Module, the output rectification filter module is also associated with MTK charging scheme recognition detection modules, and the QC2.0 charging schemes are known The output end of other detection module and the MTK charging schemes recognition detection module is connected with charging output control module, described to fill Electricity output control module is electrically connected with the high frequency transformer.

As a kind of perferred technical scheme, the MTK charging schemes recognition detection module includes and the output rectification The output electric current measure module of filtration module electrical connection, the output electric current measure module is connected with MTK electric current identification modules, institute MTK electric currents identification module is stated to electrically connect with the charging output control module.

As a kind of perferred technical scheme, the QC2.0 charging schemes recognition detection module includes and the USB port The USB charging port D+ D- signals combination detection module of module electrical connection, the USB charging ports D+ D- signal combine detections The output end of module is electrically connected with MTK and QC2.0 automatic switching modules, and the output end of the output rectification filter module is connected with Output sampling and error amplification module, the MTK and QC2.0 automatic switching modules output end and the output sampling and error Amplification module is connected, and the output end of the output sampling and error amplification module passes through optical coupling module and the charging output control Module is electrically connected.

As a kind of perferred technical scheme, the charging output control module includes PWM controller, the PWM controls The output end of device is connected with switching tube, and the switching tube is electrically connected with the high frequency transformer.

By adopting the above-described technical solution, the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes, including with The output end of the EMI processing of civil power input connection and rectification filtering module, the EMI processing and rectification filtering module becomes with high frequency The input electrical connection of depressor, the output end of the high frequency transformer is electrically connected with output rectification filter module, and the output is whole The output end of stream filtration module is connected with USB port module;Between the USB port module and the output rectification filter module QC2.0 charging scheme recognition detection modules are connected with, the feedback winding of the high frequency transformer is connected with the identification of MTK charging schemes The output end of detection module, the QC2.0 charging schemes recognition detection module and the MTK charging schemes recognition detection module connects Charging output control module is connected to, the charging output control module is electrically connected with the high frequency transformer;Charged by QC2.0 Scheme recognition detection module and MTK charging scheme recognition detections module detect the charging scheme used of mobile phone, testing result Charging output control module is fed back to, the voltage output of high frequency transformer is controlled by charging output control module, so that at USB ends Mouth mold block obtains the charging voltage for being adapted to charging scheme;The present invention can adapt to two kinds of charging schemes, highly versatile automatically.

Brief description of the drawings

Fig. 1 is the theory diagram of the embodiment of the present invention one;

Fig. 2 is the operation principle block diagram of the MTK charging schemes of the embodiment of the present invention one;

Fig. 3 is the operation principle block diagram of the QC2.0 charging schemes of the embodiment of the present invention one;

Fig. 4 is a kind of circuit diagram of the embodiment of the present invention one;

Fig. 5 is another circuit diagram of the embodiment of the present invention one;

Fig. 6 is the theory diagram of the embodiment of the present invention two.

Embodiment

With reference to the accompanying drawings and examples, the present invention is expanded on further.In the following detailed description, only explanation is passed through Mode describes some one exemplary embodiments of the present invention.Undoubtedly, one of ordinary skill in the art will recognize, In the case of without departing from the spirit and scope of the present invention, described embodiment can be repaiied with a variety of modes Just.Therefore, accompanying drawing and description are inherently illustrative, are not intended to limit the scope of the claims.

Embodiment one:

As shown in figure 1, the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes, including input what is be connected with civil power EMI processing and rectification filtering module, the input electricity of the output end and high frequency transformer of the EMI processing and rectification filtering module Connection, the output end of the high frequency transformer is electrically connected with output rectification filter module, the output rectification filter module it is defeated Go out end and be connected with USB port module;

QC2.0 charging scheme recognition detections are connected between the USB port module and the output rectification filter module Module, the QC2.0 charging schemes recognition detection module include the USB charging ports D+ that is electrically connected with the USB port module D- signals combine detection module, the output end of USB charging ports D+ D- signals combination detection module be electrically connected with MTK with QC2.0 automatic switching modules, the output end of the output rectification filter module is connected with output sampling and error amplification module, institute State MTK to be connected with the output sampling and error amplification module with the output end of QC2.0 automatic switching modules, the output sampling And the output end of error amplification module is electrically connected by optical coupling module with the charging output control module.The high frequency transformer Feedback winding be connected with MTK charging scheme recognition detection modules, the MTK charging schemes recognition detection module include with it is described The output detection of the feedback winding electrical connection of high frequency transformer and MTK identification modules, the output detection and MTK identification modules Output end is connected with the charging output control module.The QC2.0 charging schemes recognition detection module and the MTK charging sides The output end of case recognition detection module is connected with charging output control module, and the charging output control module is controlled including PWM Device, the output end of the PWM controller is connected with switching tube, and the switching tube is electrically connected with the high frequency transformer, described to open High frequency transformer described in Guan Guanyu is electrically connected.The QC2.0 charging schemes recognition detection module output sampling and error amplification mould The output end of block is connected by optical coupling module with the PWM controller, the output inspection of the MTK charging schemes recognition detection module Survey and MTK identification modules are connected with the PWM controller.

The present invention can be quickly to the use MTK's (Lian Fake schemes) and QC2.0 (high pass scheme) for filling function soon Smart mobile phone is charged, and charging scheme that can be different to two kinds carries out automatic identification, to respectively reach filling for corresponding scheme Electric agreement

When charging circuit fills scheme soon using MTK, as shown in Fig. 2 using PWM controller detection high frequency transformer feedback around The output voltage signal sensed in group, then PWM controller this signal is handled come controlling switch pipe dutycycle come The output voltage of high frequency transformer is adjusted;When charging circuit fills scheme soon using QC2.0, as shown in figure 3, by right Signal combination on USB charging port D+ D- is detected, detection data then are conveyed into PWM controller, PWM controller The characteristic that modulated signal adjusts corresponding output voltage fills scheme soon to adapt to QC2.0;The present invention can be in same circuit certainly It is dynamic to identify that MTK fills scheme and QC2.0 and fills scheme soon and charged soon.

The concrete operating principle of the present invention is as follows:MTK signals or QC2.0 signals are not detected by when circuit connects civil power When, USB port module output 5V voltages.When detecting MTK scheme charging signals, PWM controller passes through to having sensed output The detection of the high frequency transformer assists winding of voltage signal, then according to the signal of detection come the increasing of the dutycycle of controlling switch pipe It is big or reduce to adjust being raised and lowered for output voltage.In the process, QC2.0 control loops are now to disconnect.If The D+/D- signals combination that MTK/QC2.0 automatic switch-over circuits detect in USB output port is QC2.0 charge protocols agreement When signal is combined, MTK/QC2.0 automatic switch-over circuits shut-off MTK is recognized on loop, D+ D- of the PWM controller according to USB port Signal combination carry out regulation to output voltage.

A kind of quick charge scheme is the QC2.0 schemes of high pass in the present invention, using the D+ and D- of USB port voltage come The voltage for notifying charger to export, when without the signal voltage matched with QC2.0 schemes, the output voltage of USB port 5V, if this D+ and D- voltage is in the scope of QC2.0 schemes, the output voltage of USB port can raise as 9V, 12V or Depending on 20V, the voltage for depending on D+ and D-.

Another quick charge scheme is Lian Fa sections MTK scheme in the present invention, and this quick charge standard is to utilize USB The output current signal of port is completed and charger and the communication that is electrically charged between articles for use.Generally, USB port is defeated It is also 5V to go out voltage, when output current changes the scheme matching for producing corresponding voltage signal and MTK, the output electricity of charger It is 7V, 9V or 12V that pressure, which just makees corresponding rise, and the signal that this electric current changes, through a wherein winding for transformer, is conveyed to IC is detected, then changes the voltage of output.

A modules can be relatively common using prior art in theory diagram as shown in Figure 1 of the embodiment of the present invention , ripe, with identical function module realize that can realize the physical circuit figure of theory diagram function shown in Fig. 1 has very It is a variety of, Fig. 4 and shown in Fig. 5 be two of which.

As shown in Figure 4, (for example it is set in 3.5V and defeated when output voltage is more than the starting voltage of QC2.0 loop settings Go out is 5V), it at this moment be will pass through in the light idol U1A of QC2.0 loop than larger electric current, make the resistance of second half even U1B of light Anti- is in low impedance state.U1B and resistance R12 series connection is can see in Fig. 4 MTK output voltage detection loops, when U1B impedances are in During low impedance state, the output voltage of MTK loops is mainly determined by R12 and R22, and the setting of the two resistance is exactly initial 5V voltages.If at this moment MTK loops are connected to signal, the other voltages higher than 5V will be exported by MTK standard.This time is even U1B impedances be may proceed to be in low impedance state, and voltage is still controlled by MTK loops.

If at this moment MTK loops are not connected to signal, but QC2.0 loop is connected to signal, at this moment the light of QC2.0 loop Even U1A will pass through fewer electric current, reach the fixed other voltages of QC2.0 loop until going out voltage and rising, at this moment U1A Electric current just make that U1B impedances are connected after R12 and R22 is just set to the QC2.0 fixed other voltages of loop.(this be What feedback loop was automatically arrived) thus reach MTK loops and QC2.0 loop system automatic switchover, only lie in him and receive That standard number and the sixth of the twelve Earthly Branches.

In Figure 5, it can be seen that 5V starting voltage is provided and is gone to set and is performed with MTK loops, be exactly 5V only by MTK loops go to control and set.QC2.0 loop is cut off by Q3 during starting.When two standards are all not connected to signal, Only MTK loops are in work.And output voltage is set 5V.Afterwards, will be defeated by MTK standard when MTK loops are connected to signal Go out the other voltages higher than 5V, as this is with only MTK loops.Because QC2.0 loop is cut off by Q3.

If at this moment receiving QC2.0 standard signal, Q3 is just opened, while MTK loops can be cut off, is at this moment only remained Lower QC2.0 control loop is set as voltage the voltage set by QC2.0 standard in work.

Embodiment two:

The present embodiment and embodiment one are essentially identical, and difference is:As shown in fig. 6, compatibility MTK and QC2.0 chargings The two-in-one charging circuit of scheme, including EMI be connected processing and rectification filtering module are inputted with civil power, the EMI handle and The output end of rectification filtering module is electrically connected with the input of high frequency transformer, and the output end of the high frequency transformer is electrically connected with Output rectification filter module, the output end of the output rectification filter module is connected with USB port module;

QC2.0 charging scheme recognition detections are connected between the USB port module and the output rectification filter module Module, the output rectification filter module is also associated with MTK charging scheme recognition detection modules, and the QC2.0 charging schemes are known The output end of other detection module and the MTK charging schemes recognition detection module is connected with charging output control module, described to fill Electricity output control module is electrically connected with the high frequency transformer.

The MTK charging schemes recognition detection module includes the output current electrically connected with the output rectification filter module Detection module, the output electric current measure module is connected with MTK electric current identification modules, the MTK electric currents identification module with it is described The output control module that charges is electrically connected.MTK output current signal directly in output loop detection, is no longer detected with transformer. The QC2.0 charging schemes recognition detection module include the USB charging ports D+ that electrically connect with the USB port module D- believe Number combine detection module, the output end of the USB charging ports D+ D- signals combination detection module is electrically connected with MTK and QC2.0 Automatic switching module, the output end of the output rectification filter module is connected with output sampling and error amplification module, the MTK It is connected with the output end of QC2.0 automatic switching modules with the output sampling and error amplification module, the output is sampled and missed The output end of poor amplification module is electrically connected by optical coupling module with the charging output control module.The charging output control mould Block includes PWM controller, and the output end of the PWM controller is connected with switching tube, the switching tube and the high frequency transformer Electrical connection.

General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (6)

1. the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes, it is characterised in that:Including inputting what is be connected with civil power EMI processing and rectification filtering module, the input electricity of the output end and high frequency transformer of the EMI processing and rectification filtering module Connection, the output end of the high frequency transformer is electrically connected with output rectification filter module, the output rectification filter module it is defeated Go out end and be connected with USB port module;
QC2.0 charging scheme recognition detection modules are connected between the USB port module and the output rectification filter module, The feedback winding of the high frequency transformer is connected with MTK charging scheme recognition detection modules, the QC2.0 charging schemes identification inspection The output end for surveying module and the MTK charging schemes recognition detection module is connected with charging output control module, and the charging is defeated Go out control module to electrically connect with the high frequency transformer;
The QC2.0 charging schemes recognition detection module include the USB charging ports D+ that is electrically connected with the USB port module D- signals combine detection module, the output end of USB charging ports D+ D- signals combination detection module be electrically connected with MTK with QC2.0 automatic switching modules, the output end of the output rectification filter module is connected with output sampling and error amplification module, institute State MTK to be connected with the output sampling and error amplification module with the output end of QC2.0 automatic switching modules, the output sampling And the output end of error amplification module is electrically connected by optical coupling module with the charging output control module.
2. the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes as claimed in claim 1, it is characterised in that:It is described MTK charging scheme recognition detections module includes the output detection electrically connected with the feedback winding of the high frequency transformer and MTK knows The output end of other module, the output detection and MTK identification modules is connected with the charging output control module.
3. the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes as claimed in claim 1 or 2, it is characterised in that: The charging output control module includes PWM controller, and the output end of the PWM controller is connected with switching tube, the switch Pipe is electrically connected with the high frequency transformer.
4. the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes, it is characterised in that:Including inputting what is be connected with civil power EMI processing and rectification filtering module, the input electricity of the output end and high frequency transformer of the EMI processing and rectification filtering module Connection, the output end of the high frequency transformer is electrically connected with output rectification filter module, the output rectification filter module it is defeated Go out end and be connected with USB port module;
QC2.0 charging scheme recognition detection modules are connected between the USB port module and the output rectification filter module, The output rectification filter module is also associated with MTK charging scheme recognition detection modules, the QC2.0 charging schemes recognition detection The output end of module and the MTK charging schemes recognition detection module is connected with charging output control module, the charging output Control module is electrically connected with the high frequency transformer;The QC2.0 charging schemes recognition detection module includes and the USB port The USB charging port D+ D- signals combination detection module of module electrical connection, the USB charging ports D+ D- signal combine detections The output end of module is electrically connected with MTK and QC2.0 automatic switching modules, and the output end of the output rectification filter module is connected with Output sampling and error amplification module, the MTK and QC2.0 automatic switching modules output end and the output sampling and error Amplification module is connected, and the output end of the output sampling and error amplification module passes through optical coupling module and the charging output control Module is electrically connected.
5. the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes as claimed in claim 4, it is characterised in that:It is described MTK charging scheme recognition detections module includes the output electric current measure module electrically connected with the output rectification filter module, institute State output electric current measure module and be connected with MTK electric current identification modules, the MTK electric currents identification module and the charging output control Module is electrically connected.
6. the two-in-one charging circuit of compatibility MTK and QC2.0 charging schemes as claimed in claim 4, it is characterised in that:It is described The output control module that charges includes PWM controller, and the output end of the PWM controller is connected with switching tube, the switching tube with The high frequency transformer electrical connection.
CN201510306842.4A 2015-06-05 2015-06-05 The two-in-one charging circuit of compatible MTK and QC2.0 charging schemes CN104917267B (en)

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CN105471047B (en) * 2016-01-08 2019-10-01 深圳市博巨兴微电子科技有限公司 A kind of QC2.0 protocol circuit for mobile power source electric discharge
KR20180016444A (en) * 2016-02-05 2018-02-14 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Charging system for terminal, charging method and power adapter, switching power supply
EP3276782B1 (en) * 2016-07-26 2018-11-28 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system and method, and power adapter
SG11201700428UA (en) * 2016-02-05 2017-09-28 Guangdong Oppo Mobile Telecommunications Corp Ltd Charge method, adapter and mobile terminal
CN105610221B (en) * 2016-02-26 2018-07-17 深圳市博巨兴实业发展有限公司 A kind of QC2.0 fast charge protocol circuits applied to mobile power charging
CN106125013B (en) * 2016-09-05 2019-05-24 东莞市旺达富自动化设备有限公司 A kind of fast charge class Testing System of Product Aging of highly compatible

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CN202333937U (en) * 2011-11-28 2012-07-11 八叶(厦门)新能源科技有限公司 Two-string lithium battery charging circuit
CN202888879U (en) * 2012-09-18 2013-04-17 东莞市金欣电子有限公司 Multifunctional quick-charging phone charger with USB HUB interface

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