CN104917267A - Two-in-one charging circuit compatible with MTK and QC2.0 charging schemes - Google Patents
Two-in-one charging circuit compatible with MTK and QC2.0 charging schemes Download PDFInfo
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Abstract
The invention discloses a two-in-one charging circuit compatible with MTK and QC2.0 charging schemes. The two-in-one charging circuit comprises an EMI processing and rectification-filtration module, a high-frequency transformer, an output rectification-filtration module and a USB port module which are electrically connected in sequence, wherein the USB port module is connected with a QC2.0 charging scheme identification and detection module, a feedback winding of the high-frequency transformer is connected with an MTK charging scheme identification and detection module, output ends of the QC2.0 charging scheme identification and detection module and the MTK charging scheme identification and detection module are each connected with a charging output control module, the charging output control module is electrically connected with the high-frequency transformer. The charging scheme of a mobile phone is detected through the corresponding detection module, the detection results are fed back to the charging output control module, and voltage output of the high-frequency transformer is controlled by the charging output control module, thus a charging voltage suitable for the charging scheme is obtained in the USB port module; and the two-in-one charging circuit can automatically adapt to the two charging schemes and is high in universality.
Description
Technical field
The present invention relates to rapid nitriding field, particularly relate to a kind of compatible MTK and QC2.0 charging scheme mobile phone charging quickly road.
Background technology
In prior art, the quick charge scheme of mobile phone mainly contains two kinds, a kind of is the MTK charging scheme of MediaTek Inc, another kind is the QC2.0 charging scheme of Qualcomm, these two kinds of charging schemes are different to the requirement of charger output voltage, need different charging circuits, so adopt the charger for mobile phone of two kinds of charging schemes to share, under the present situation that smart mobile phone is universal, charger cannot share and bring certain difficulty to daily life.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of highly versatile, is applicable to the two-in-one charging circuit of compatible MTK and the QC2.0 charging scheme of USB charging.
For solving the problems of the technologies described above, technical scheme of the present invention is: the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module;
QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, the feedback winding switching of described high frequency transformer has MTK charging scheme recognition detection module, the output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, and described charging output control module is electrically connected with described high frequency transformer.
As the preferred technical scheme of one, described QC2.0 charging scheme recognition detection module comprise the USB charging port D+ that is electrically connected with described USB port module D-signal combination detection module, described USB charging port D+ the output of D-signal combination detection module be electrically connected with MTK and QC2.0 automatic switching module, the output of described output rectification filter module is connected with and exports sampling and error amplification module, the output of described MTK and QC2.0 automatic switching module to sample and error amplification module is connected with described output, the described output exporting sampling and error amplification module is electrically connected with described charging output control module by optical coupling module.
As the preferred technical scheme of one, described MTK charging scheme recognition detection module comprises the output detections and MTK identification module that are connected with the feedback winding electric of described high frequency transformer, and the output of described output detections and MTK identification module is connected with described charging output control module.
As the preferred technical scheme of one, described charging output control module comprises PWM controller, and the output of described PWM controller is connected with switching tube, and described switching tube is electrically connected with described high frequency transformer.
The two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module;
QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, described output rectification filter module is also connected with MTK charging scheme recognition detection module, the output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, and described charging output control module is electrically connected with described high frequency transformer.
As the preferred technical scheme of one, described MTK charging scheme recognition detection module comprises the output electric current measure module be electrically connected with described output rectification filter module, described output electric current measure model calling has MTK electric current identification module, and described MTK electric current identification module is electrically connected with described charging output control module.
As the preferred technical scheme of one, described QC2.0 charging scheme recognition detection module comprise the USB charging port D+ that is electrically connected with described USB port module D-signal combination detection module, described USB charging port D+ the output of D-signal combination detection module be electrically connected with MTK and QC2.0 automatic switching module, the output of described output rectification filter module is connected with and exports sampling and error amplification module, the output of described MTK and QC2.0 automatic switching module to sample and error amplification module is connected with described output, the described output exporting sampling and error amplification module is electrically connected with described charging output control module by optical coupling module.
As the preferred technical scheme of one, described charging output control module comprises PWM controller, and the output of described PWM controller is connected with switching tube, and described switching tube is electrically connected with described high frequency transformer.
Owing to have employed technique scheme, the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module; QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, the feedback winding switching of described high frequency transformer has MTK charging scheme recognition detection module, the output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, and described charging output control module is electrically connected with described high frequency transformer; By the charging scheme adopted of QC2.0 charging scheme recognition detection module and MTK charging scheme recognition detection module detection of handset, testing result feeds back to charging output control module, the voltage being controlled high frequency transformer by charging output control module exports, thus obtains the charging voltage being applicable to charging scheme in USB port module; The present invention can adapt to two kinds of charging schemes automatically, highly versatile.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention one;
Fig. 2 is the operation principle block diagram of the embodiment of the present invention one MTK charging scheme;
Fig. 3 is the operation principle block diagram of the embodiment of the present invention one QC2.0 charging scheme;
Fig. 4 is a kind of circuit diagram of the embodiment of the present invention one;
Fig. 5 is the another kind of 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
Below in conjunction with drawings and Examples, set forth the present invention further.In the following detailed description, the mode only by illustrating describes some one exemplary embodiment of the present invention.Undoubtedly, those of ordinary skill in the art can recognize, when without departing from the spirit and scope of the present invention, can revise by various different mode to described embodiment.Therefore, accompanying drawing is illustrative with being described in essence, instead of for limiting the protection range of claim.
Embodiment one:
As shown in Figure 1, the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module;
QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, described QC2.0 charging scheme recognition detection module comprise the USB charging port D+ that is electrically connected with described USB port module D-signal combination detection module, described USB charging port D+ the output of D-signal combination detection module be electrically connected with MTK and QC2.0 automatic switching module, the output of described output rectification filter module is connected with and exports sampling and error amplification module, the output of described MTK and QC2.0 automatic switching module to sample and error amplification module is connected with described output, the described output exporting sampling and error amplification module is electrically connected with described charging output control module by optical coupling module.The feedback winding switching of described high frequency transformer has MTK charging scheme recognition detection module, described MTK charging scheme recognition detection module comprises the output detections and MTK identification module that are connected with the feedback winding electric of described high frequency transformer, and the output of described output detections and MTK identification module is connected with described charging output control module.The output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, described charging output control module comprises PWM controller, the output of described PWM controller is connected with switching tube, described switching tube is electrically connected with described high frequency transformer, and described switching tube is electrically connected with described high frequency transformer.The output that described QC2.0 charging scheme recognition detection module exports sampling and error amplification module is connected with described PWM controller by optical coupling module, and output detections and the MTK identification module of described MTK charging scheme recognition detection module are connected with described PWM controller.
The present invention can charge to the smart mobile phone with employing MTK (Lian Fake scheme) and the QC2.0 (high pass scheme) filling function soon fast, automatically can identify two kinds of different charging schemes, to reach the charge protocol of corresponding scheme respectively
When charging circuit utilizes MTK to fill scheme soon, as shown in Figure 2, adopt PWM controller to detect the output voltage signal that senses on high frequency transformer feedback winding, the output voltage of duty ratio to high frequency transformer that then PWM controller processes control switch pipe to this signal regulates; When charging circuit adopts QC2.0 to fill scheme soon, as shown in Figure 3, by to USB charging port D+ signal combination on D-detect, then detection data are flowed to PWM controller, PWM controller modulation signal regulates the characteristic of corresponding output voltage to fill scheme soon to adapt to QC2.0; The present invention can automatically identify MTK and fill scheme soon and QC2.0 fills scheme soon and charges in same circuit.
Specific works principle of the present invention is as follows: when MTK signal or QC2.0 signal not detected when circuit ON civil power, and USB port module exports 5V voltage.When MTK scheme charging signals being detected, PWM controller, by assisting the detection of winding to the high frequency transformer responding to output voltage signal, is then carried out the increase of the duty ratio of control switch pipe according to the signal detected or reduces to come rising or the reduction of regulation output voltage.In the process, QC2.0 control loop is now disconnect.If when MTK/QC2.0 automatic switch-over circuit detects that the D+/D-signal combination on USB output port is the signal combination of QC2.0 charge protocol agreement, MTK/QC2.0 automatic switch-over circuit turns off MTK and identifies loop, and PWM controller carries out the adjustment to output voltage according to the signal combination on the D+ D-of USB port.
In the present invention, a kind of quick charge scheme is the QC2.0 scheme of high pass, utilize the voltage of D+ and D-of USB port to notify the voltage that charger should export, when there is no the signal voltage with QC2.0 scheme coupling, the output voltage of USB port is 5V, if the voltage of this D+ and D-is when the scope of QC2.0 scheme, the output voltage of USB port can raise as 9V, 12V or 20V, depends on the voltage of D+ and D-and determines.
The scheme of another kind of quick charge scheme Shi Lianfa section MTK in the present invention, this quick charge standard be utilize the output current signal of USB port and charger and by charging articles for use between communication.Generally, the output voltage of USB port is also 5V, when output current change produces the scheme coupling of corresponding voltage signal and MTK, it is 7V, 9V or 12V that the output voltage of charger just does corresponding rising, the signal that this electric current changes, through a wherein winding of transformer, flow to and detect IC, then change the voltage of output.
In embodiment of the present invention theory diagram as shown in Figure 1 modules can adopt prior art more common, module that is ripe, that have identical function realizes, the physical circuit figure that can realize the function of theory diagram shown in Fig. 1 has a variety of, and shown in Fig. 4 and Fig. 5 is wherein two kinds.
As shown in Figure 4, when output voltage is greater than the starting voltage of QC2.0 loop settings (being such as set in 3.5V and exporting is 5V), at this moment will flow through larger electric current at the even U1A of the light of the loop of QC2.0, make the impedance of second half U1B of light idol be low impedance state.Can see that U1B and resistance R12 connects in the MTK output voltage detection loop of Fig. 4, when U1B impedance is low impedance state, the output voltage of MTK loop is mainly determined by R12 and R22, and what these two resistance set is exactly initial 5V voltage.If at this moment MTK loop receives signal, other voltage higher than 5V will be exported by the standard of MTK.This time, even U1B impedance can continue in low impedance state, and voltage is still controlled by MTK loop.
If at this moment MTK loop does not receive signal, but the loop of QC2.0 receives signal, at this moment the even U1A of the light of the loop of QC2.0 will flow through fewer electric current, until go out voltage rise to reach other fixed voltage of the loop of QC2.0, at this moment the electric current of U1A just makes U1B impedance connect after R12 and R22 is just set to other fixed voltage of the loop of QC2.0.Loop system that (this reaches automatically at feedback loop) just reaches like this MTK loop and QC2.0 automatically switches, only lie in he receive that standard number and the sixth of the twelve Earthly Branches.
In Figure 5, can see, the starting voltage of 5V be provided and goes setting and execution with MTK loop, be exactly that 5V is only gone to control and setting by MTK loop.Time initial, the loop of QC2.0 is cut off by Q3.When two standards all do not receive signal, only has MTK loop in work.And output voltage is set 5V.Afterwards, when MTK loop receives signal, will export other voltage higher than 5V by the standard of MTK, this is the same with only having MTK loop.Because the loop of QC2.0 is cut off by Q3.
If at this moment receive the standard signal of QC2.0, Q3 is just opened, and MTK loop can be cut off simultaneously, and at this moment only the control loop of remaining QC2.0, in work, is set as voltage the voltage set by standard of QC2.0.
Embodiment two:
The present embodiment is substantially identical with embodiment one, difference is: as shown in Figure 6, the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module;
QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, described output rectification filter module is also connected with MTK charging scheme recognition detection module, the output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, and described charging output control module is electrically connected with described high frequency transformer.
Described MTK charging scheme recognition detection module comprises the output electric current measure module be electrically connected with described output rectification filter module, described output electric current measure model calling has MTK electric current identification module, and described MTK electric current identification module is electrically connected with described charging output control module.The output current signal of MTK directly detects at output loop, no longer detects with transformer.Described QC2.0 charging scheme recognition detection module comprise the USB charging port D+ that is electrically connected with described USB port module D-signal combination detection module, described USB charging port D+ the output of D-signal combination detection module be electrically connected with MTK and QC2.0 automatic switching module, the output of described output rectification filter module is connected with and exports sampling and error amplification module, the output of described MTK and QC2.0 automatic switching module to sample and error amplification module is connected with described output, the described output exporting sampling and error amplification module is electrically connected with described charging output control module by optical coupling module.Described charging output control module comprises PWM controller, and the output of described PWM controller is connected with switching tube, and described switching tube is electrically connected with described high frequency transformer.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (8)
1. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, it is characterized in that: comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module;
QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, the feedback winding switching of described high frequency transformer has MTK charging scheme recognition detection module, the output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, and described charging output control module is electrically connected with described high frequency transformer.
2. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme as claimed in claim 1, it is characterized in that: described QC2.0 charging scheme recognition detection module comprise the USB charging port D+ that is electrically connected with described USB port module D-signal combination detection module, described USB charging port D+ the output of D-signal combination detection module be electrically connected with MTK and QC2.0 automatic switching module, the output of described output rectification filter module is connected with and exports sampling and error amplification module, the output of described MTK and QC2.0 automatic switching module to sample and error amplification module is connected with described output, the described output exporting sampling and error amplification module is electrically connected with described charging output control module by optical coupling module.
3. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme as claimed in claim 1, it is characterized in that: described MTK charging scheme recognition detection module comprises the output detections and MTK identification module that are connected with the feedback winding electric of described high frequency transformer, and the output of described output detections and MTK identification module is connected with described charging output control module.
4. the two-in-one charging circuit of compatible MTK and the QC2.0 charging scheme as described in claim 1,2 or 3, it is characterized in that: described charging output control module comprises PWM controller, the output of described PWM controller is connected with switching tube, and described switching tube is electrically connected with described high frequency transformer.
5. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme, it is characterized in that: comprise the EMI process and rectification filtering module that are connected with civil power input, described EMI process and the output of rectification filtering module are electrically connected with the input of high frequency transformer, the output of described high frequency transformer is electrically connected with output rectification filter module, and the output of described output rectification filter module is connected with USB port module;
QC2.0 charging scheme recognition detection module is connected with between described USB port module and described output rectification filter module, described output rectification filter module is also connected with MTK charging scheme recognition detection module, the output of described QC2.0 charging scheme recognition detection module and described MTK charging scheme recognition detection module is connected with charging output control module, and described charging output control module is electrically connected with described high frequency transformer.
6. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme as claimed in claim 5, it is characterized in that: described MTK charging scheme recognition detection module comprises the output electric current measure module be electrically connected with described output rectification filter module, described output electric current measure model calling has MTK electric current identification module, and described MTK electric current identification module is electrically connected with described charging output control module.
7. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme as claimed in claim 1, it is characterized in that: described QC2.0 charging scheme recognition detection module comprise the USB charging port D+ that is electrically connected with described USB port module D-signal combination detection module, described USB charging port D+ the output of D-signal combination detection module be electrically connected with MTK and QC2.0 automatic switching module, the output of described output rectification filter module is connected with and exports sampling and error amplification module, the output of described MTK and QC2.0 automatic switching module to sample and error amplification module is connected with described output, the described output exporting sampling and error amplification module is electrically connected with described charging output control module by optical coupling module.
8. the two-in-one charging circuit of compatible MTK and QC2.0 charging scheme as claimed in claim 5, it is characterized in that: described charging output control module comprises PWM controller, the output of described PWM controller is connected with switching tube, and described switching tube is electrically connected with described high frequency transformer.
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