Lightweight portable computer charging circuitTechnical field
The present invention relates to electronic circuit product technical fields, specially lightweight portable computer charging circuit.
Background technique
With social development, laptop, net book, tablet computer etc. is all towards powerful, the side of weight savingTo development.But matching charger is basic or is perseverance 220V AC conversion by inductance transformation and rectifier bridge principleStraightening galvanic electricity charges to electrical equipment.Inductance principle must use inductance coil, this result in charger volume andWeight is difficult to reduce.And charger can only be adapted to 220V alternating current, be not suitable for vehicle-mounted, and go abroad, the use environments such as mobile office.Many notebooks in the market, net book, the equipment such as tablet computer itself are made very light, but equipment charger is but difficult as handMachine quick charger equally accomplishes lightweight.
Existing portable computer charger mostly uses 50HZ Industrial Frequency Transformer, by large-scale copper coil winding transformation,Size is big, and weight is big, and design has redundant power, so power is also big, generally 40W or so.Mobile phone quick charger is generally adoptedWith switching circuit and high frequency transformer, size is smaller, and power is up to 24-30W or so, if not considering redundant power, as justIt is enough to take charger.As long as so adding modulation circuit by current-modulation to be that portable computer is compatible with mobile phone quick chargerSpecification can use.
In addition, Industrial Frequency Transformer transformation specification is designed depending on coil windings, it can only be according to a kind of fixation of design alternativeTransformation specification.And switching circuit and high frequency transformer principle add the mobile phone quick charger of modulation circuit can be by different againMode is compatible with 110V, 220V alternating current and 12V mobile unit electric current, can also be compatible with the charger baby for meeting respective standard.This hairBright to take electricity from RAPID CHARGING POWER SUPPLY by modulation circuit, power supply to the device greatly improves portable equipment chargingCompatibility.
Prior art disadvantage is that the charger of portable computer (such as net book, tablet computer etc.) is all very heavy, unfavorableIn portable.
For this purpose, we have proposed lightweight portable computer charging circuits to solve above-mentioned drawback.
Summary of the invention
The purpose of the present invention is to provide lightweight portable computer charging circuits, to solve to propose in above-mentioned background techniqueThe problem of.
To achieve the above object, the invention provides the following technical scheme: lightweight portable computer charging circuit, including controlThe modulation circuit of USB interface in system processed and forming control system, the control system include that RAPID CHARGING POWER SUPPLY, USB connectThe modulation circuit and different size electrical equipment of mouth, the modulation of the output end, input terminal and USB interface of the RAPID CHARGING POWER SUPPLYTwo-way electric connection between the output end of circuit, input terminal, the output end and different size of the modulation circuit of the USB interface are usedIt is electrically connected between the input terminal of electric equipment；
The modulation circuit of the USB interface includes switch module and Voltage stabilizing module, and the switch module is made of K1 and K2,The Voltage stabilizing module includes ZD, and the left end of the K1 and K2 are respectively connected to D- and D+, the right end of the K1 be electrically parallel with ZD andResistance, resistance include R2 and R3, and electrical series between the R2 and R3, for the K2 right end equipped with three wiring, three wiring are sameShi Binglian accesses the both ends of R2, left side access GND, the output of the right cathode between the R3 and ZD, between the R2 and ZD electricallyIt is connected with R1, R1 is exported far from one end left end access VBUS, the right end anode of ZD, taken in the Voltage stabilizing module by the way that signal is quenchedDifferent voltages feed back to D- and D+ out, realize different output.
Preferably, the right end of the K1 also accesses in three wiring of K2 right end in the wiring of upper end.
Preferably, the Voltage stabilizing module available model is the replacement of the voltage stabilizing chips such as TL431, T133.
Preferably, the replacement of the analog switch chips such as model CD4052 can be used in the switch module.
Preferably, singlechip chip replacement also can be used in the Voltage stabilizing module and switch module.
Preferably, the RAPID CHARGING POWER SUPPLY includes fast charge charger baby, mobile phone quick charger and vehicle-mounted quick charge headDeng.
Preferably, the different size electrical equipment includes the products such as laptop, net book and tablet computer.
Compared with prior art, the beneficial effects of the present invention are: structure of the invention setting rationally, functional, have withLower advantage:
1. passing through light maturation and adding modulation circuit to the mobile phone fast charge equipment of alternating current highly compatible to realize to penRemember the bigger charging of mobile devices such as this computer, the portability and compatibility of quick charger is utilized, is substituted common stupidWeight laptop charger, improves to the charging convenience of the mobile devices such as laptop, is conducive to improve mobile device justThe property taken and cruising ability can be realized different voltages area, the power supply of the various ways such as vehicle-mounted and mobile charging treasured；
2. the electric current after transformation is supplied to use by modulation circuit come transformation by switching circuit and high frequency transformerThis portable, multiple compatibility charging modes of electric equipment；
3. the charger under compared with prior art, present invention decreases volume and weights, portability and compatibility are improved.
Detailed description of the invention
Fig. 1 is the modulation circuit structural schematic diagram of USB interface of the present invention；
Fig. 2 is control system architecture schematic diagram of the present invention；
Fig. 3 is fast charge USB plug stitch definition structure schematic diagram of the present invention；
Fig. 4 is the voltage output schematic diagram of QC2.0 fast charge agreement of the present invention；
Fig. 5 is the voltage output schematic diagram of QC3.0 fast charge agreement of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, completeSite preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
Fig. 1 to Fig. 5 is please referred to, the present invention provides a kind of technical solution: lightweight portable computer charging circuit, including controlThe modulation circuit of USB interface in system processed and forming control system, control system include RAPID CHARGING POWER SUPPLY, USB interfaceModulation circuit and different size electrical equipment, the modulation circuit of the output end of RAPID CHARGING POWER SUPPLY, input terminal and USB interface it is defeatedTwo-way electric connection between outlet, input terminal, the output end of the modulation circuit of USB interface and the input of different size electrical equipmentIt is electrically connected between end；
The modulation circuit of USB interface includes switch module and Voltage stabilizing module, and switch module is made of K1 and K2, pressure stabilizing mouldBlock includes that the left end of ZD, K1 and K2 are respectively connected to D- and D+, and the right end of K1 is electrically parallel with ZD and resistance, resistance include R2 andElectrical series between R3, R2 and R3, K2 right end are equipped with three wiring, the both ends of three wiring parallel connection access simultaneously R2, R3 and ZDBetween left side access GND, the output of the right cathode, be electrically connected with R1 between R2 and ZD, R1 is accessed far from one end left end of ZDVBUS, right end anode export, and take out different voltages by signal quenched (switch) in Voltage stabilizing module and feed back to D- and D+, realize notSame output.
The right end of K1 also accesses in three wiring of K2 right end in the wiring of upper end, and K2 controls three wiring, and K1 controls twoWiring.
Voltage stabilizing module available model is the replacement of the voltage stabilizing chips such as TL431, T133.
The replacement of the analog switch chips such as model CD4052 can be used in switch module.
Singlechip chip replacement also can be used in Voltage stabilizing module and switch module, easy to use, convenient for according to actual needs intoRow selection.
RAPID CHARGING POWER SUPPLY includes fast charge charger baby, mobile phone quick charger and vehicle-mounted quick charge head etc..
Different size electrical equipment includes the products such as laptop, net book and tablet computer.
The present invention has used for reference current common mobile phone quick charge to solve lightweight, portability and generalization problemPrinciple, utilization on the market common mobile phone quick charger to laptop, net book, the charging such as tablet computer, Neng GoujiThe volume and weight of charger is carried needed for big reduction.It can be compatible with vehicle mounted electric easily using the USB interface of international standardSource, mobile power source and external common voltage (such as 110V alternating current) charge.
The technical solution adopted by the present invention may be implemented fast to common mobile phone quick charger/vehicle-mounted by modulation circuitThe power supply units input modulating signals such as fast charging head/fast charge charger baby, so that the output of power supply unit USB jack meets fast charge agreementIt is required that electric current, then by modulation circuit USB port export electric current be supplied to electrical equipment charging.Mobile phone quick charger is basicInternational standard is realized, same fast charge agreement is met, is often adapted to different city's electrical specifications of multiple countries and regions, andAlternating current is modulated into the electric current output for meeting fast charge agreement.Onboard charger and mobile power source also have many compatible quick charge associationsThe product of view.So the present invention can be compatible with a variety of power supply modes.Furthermore for alternating current be modulated into charging current mobile phone it is quickCharger widespread commercial, light degree is considerably beyond laptop charger.
Charger under compared with prior art, present invention decreases volume and weights, improve portability and compatibility.
Such as the original-pack charger weight about 200G of Microsoft's money tablet computer, pilot sample weight of the present invention only 93G.VolumeAlso about original half is narrowed down to.
The part that the present invention modulates circuit is by taking QualCom company QC standard fast charge agreement as an example.Also it can use the countryThe similar fast charge agreement of the similar company such as producer OPPO, Huawei or Samsung, apple realizes said function, only in modulation systemIt is upper slightly to distinguish.
Working principle: product of the present invention includes modulation circuit and ampere wires and output plug with USB interface, works as bandIt, will after having the modulation circuit access RAPID CHARGING POWER SUPPLY (charger, onboard charger, quick charge are precious) of USB standard interfaceAccording to corresponding fast charge protocol, by D+, D- stitch adjusts VBUS stitch to RAPID CHARGING POWER SUPPLY feedback signalOutput voltage.The voltage of VBUS stitch output can be connected to the notebook for needing to charge by ampere wires and output plugComputer, net book, on the products such as tablet computer.These products generally have different charging voltages, such as high-power notebookGenerally in 20V or so, net book and tablet computer are in 12-20V or so.Applicable charging can be obtained by circuit modulationVoltage.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be withA variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understandingAnd modification, the scope of the present invention is defined by the appended.