CN201038802Y - Multifunctional charger - Google Patents

Abstract

The utility model discloses a novel multifunctional charger, belonging to the latest application of a power and electronic technique. The utility model provides three input modes, namely, a common 220V AC power supply input, a vehicle-load 12V input and a computer USB port 5V input, and the utility model also can charge digital products such as various cell phones, digital cameras, and digital camcorders that are provided with USB ports and also can charge four 5 model batteries. The utility model is characterized in that the volume is small, the integrated degree is high, and various necessary electronic products can be charged in various situations with the utility model.

Description

A kind of multifunctional charger

Technical field:

The utility model relates to a kind of multifunctional charger, belongs to the power electronics applied technical field.

Background technology:

Along with the develop rapidly in epoch, digital product miscellaneous has become the necessity of people life, enjoy new science and technology to we bring fast happy convenient the time, the charging problem of these products is also more and more perplexing people.Current, commercially available charger charging modes and function singleness are difficult to satisfy modern life active rate height, and rhythm is fast, to accompanied electronic article claimed structure compactness, the characteristics of diverse in function.Under this background, the Multifunctional USB charger has just arisen at the historic moment.It mainly has three kinds of input modes, the input of promptly public 220V alternating current frequently, input of notebook computer USB mouth and vehicle-mounted 12V input, and be electronic product chargings such as mobile phone, mp3, digital camera simultaneously, also kept simultaneously and be the interface of ni-mh AA type battery charge, be very easy to people's life.Therefore, we can expect that fully the wide range of commercial that this product has is worth.

Summary of the invention:

The purpose of this utility model is to provide a kind of multifunctional charger, can be under multiple situation for multiple indispensable electronic product and battery charge single with the charge mode that overcomes existing charger, the deficiency of charge prepd category limitation.Has the advantage that portable machine charges whenever and wherever possible.

The technical scheme that realizes above-mentioned purpose is: the cell-phone charging module is mutually integrated with the digital product charging module with USB interface and No. 5 (NI-G/ni-mh) charging cell modules.And three modules organically are connected as a single entity by input/output interface.

A kind of multifunctional charger has USB5V direct-flow input circuit, vehicle-mounted 12V direct-flow input circuit, the public input circuit of 220V alternating current frequently; Three kinds of circuit all are connected in the charger on the mainboard, and the dividing potential drop effect parallel connection by voltage outputs to current output terminal.

The structure of USB5V direct-flow input circuit is: by a USB extended line, its wide mouth end inserts in the computer, and other end reservation+5V pressure-wire and earth connection insert mainboard AAT3680 pin.

The structure of vehicle-mounted 12V direct-flow input circuit is: by a vehicle power line, its round mouth termination is gone in the automobile cigarette lighter, and other end reservation+12V pressure-wire and earth connection insert mainboard MAX712 chip pin.

The structure of the public input circuit of 220V alternating current frequently is: by a two-seater plug, it can insert in the public 220V power supply frequently, and the line other end inserts in the mainboard PWM rectification circuit.

Specifically, its innovative point is to provide the 220V ac power supply, also has power supply of 12V vehicle power and 5VUSB electric supply interface formula.The conversion that various input voltages are necessary each other adapting to the needs of various charging module input voltages, thereby is organically united multiple input function.Simultaneously, various charge function modules are carried out integrated, realize multiple output function, be mobile phone, essential items such as mp3, battery etc. with oneself charge.It provides 3 kinds of input modes, promptly common 220V AC power input, vehicle-mounted 12V input and computer USB interface 5V input.And can be the mobile phone of various models simultaneously, digital camera, Digital Video etc. have the digital product of USB interface, also can be No. 5 battery charge of 4 joints, the utlity model has that volume is little, integrated level is high, and can be the characteristics that multiple at present indispensable electronic product charges under multiple varying environment.

Description of drawings:

Fig. 1 is the lithium ion cell charging characteristic curve of AAT3680;

Fig. 2 is the peripheral typical application drawing of AAT3680;

Fig. 3 is USB port specification figure;

Fig. 4 is the peripheral typical application circuit figure of MAX712;

Fig. 5 is input, output module schematic diagram;

Fig. 6 is a voltage-type three-phase bridge PWM rectification circuit;

Fig. 7 is the PWM output waveform.

Embodiment:

By above given accompanying drawing, can understand and understand internal circuit configuration of the present utility model, below in conjunction with accompanying drawing,, will and realize that the technical scheme of purpose is more clear to the purpose of this utility model by the description of embodiment.

Replaceable handset port, slot USB line interface, No. 5 charging battery cartridges are arranged,

The structure of replaceable handset port is: is connected to cell phone mainboard AAT3680 output by interface pedestal, is inserted with dissimilar replaceable cellular phone power supplies interfaces on the base,

The structure of slot USB line interface is: inserted in the charging device by the slot end, its other end use+5V power line and ground wire insert charger AAT3680 and MAX712 chip output,

The structure of No. 5 charging battery cartridges is: be connected into the PWM rectification circuit output end by the battery case lead-in wire.

One, output

1. the cell-phone charging module sees also accompanying drawing 1,2.The AAT3680 lithium ion battery linear-charging managing chip that the cell-phone charging module adopts U.S. AATI Science and Technology Ltd. to produce, use the charger peripheral circuit of AAT3680 design very simple, be very suitable for the compact design needs of portable type electronic product.For the design mobile phone, PDA, digital camera, the charger for lithium ion battery of hand-held instrument etc. can satisfy the needs to the lithium ion cell charging management.Be illustrated in figure 1 as the lithium ion cell charging characteristic of this circuit, input voltage 4.5V～15V, output voltage 4.1V or 4.2V, low excessively as lithium ion battery voltage when the charging beginning, then adopt the trickle charge mode that lithium ion battery is carried out precharge earlier.When lithium ion battery has certain electric current, voltage, promptly enter constant current charging mode, the voltage of lithium ion battery raises gradually.When the voltage of lithium ion battery is elevated to 4.0V (V _CH=4.1V) or 4.1V (V _CH=4.2V) time, changing the constant voltage charge pattern over to, charging current reduces gradually, and when electric current and voltage had all reached the target setting value, charging process finished.Adopt circuit shown in the accompanying drawing 2, the full name to its temperature and charged state in the time of can realizing lithium ion cell charging is monitored.When lithium ion battery generation overcurrent, when short circuit and overtemperature, will close automatically, thus protection electrical equipment and lithium ion battery.Have the lithium ion battery temperature-monitoring function simultaneously, utilize the temperature sensor of lithium ion battery, continuous detecting lithium ion battery temperature when temperature exceeds setting range, is closed the charging of lithium ion battery automatically or is automatically switched to the trickle charge pattern.In addition, this circuit also has automatically charging again, trickle charge, and two times of trickle charges, constant current charge, constant voltage charge, under voltage stops automatically, multiple functions such as low-power consumption dormancy.

2.mp3 digital cameras etc. have the charging module of the digital product of USB socket, see also accompanying drawing 3.Because of the required supply power voltage difference of each digital equipment charging lithium ion battery, when assembled product, can carry out selectivity and install rated voltage, its benefit is the injury of having avoided universal charger to cause owing to voltage is unbalanced for lithium ion battery.For cooperating the lithium ion battery of various lithium ion batteries and varying number, AAT3680 can be with charging voltage V _CHBe predisposed to 4.1V, 4.2V, 8.2V or 8.4V.

3.5 number (NI-G/ni-mh) battery charging module.See also accompanying drawing 5.MAX712 is the quick charge managing chip that Maxim company produces, and is fit to the charging needs of NI-G or Ni-MH battery, can realize rechargeable battery quantity and the control of maximum charge time.In addition, this integrated circuit also has the charging process automation, and the charging interval is short, efficient height, advantage such as flexible and convenient to use.In the accompanying drawing 5, this circuit is selected the quick charge time, T to three joint AA type 1Ah Ni-MH battery chargings _FAST=90min.Power input voltage has 3V, 4.5V, 6V, 9V, 12V, specifications such as 15V and 18V.Select supply voltage U for 5 kinds at accompanying drawing _DC=9V, input current are 800mA.C ₁Be input filtering electric capacity, R ₁Be current-limiting resistance, the voltage of inner shunt regulator is 5V, with R1 the minimal power electric current that V+ holds is defined as 5mA, works as C ₂Both end voltage U _C2During=V+=+5V, the beginning quick charge.

Two, input

1.220V exchange input.For the cell-phone charging module, can be directly as the input power supply; For other lithium ion cell charging modules, according to the V of AAT3680 _CHThe difference of the value of setting is converted into different direct voltages with the 220V interchange, and equipment is charged; For nickel-cadmium/nickel-hydrogen cell,, the 220V interchange is converted into different voltage battery is charged according to rechargeable battery quantity and the different choice of maximum charge time.

2.12V vehicle power input.For cell-phone charging module and lithium ion cell charging module,, can directly charge to equipment because the input range of AAT3680 is 4.5V～15V; For the nickel-cadmium/nickel-hydrogen cell charging module, when the input voltage of selection circuit is 12V, suitably regulate current-limiting resistance R ₁Value, can be directly as the input power supply.

3.USB5V power supply input.Can be to mobile phone and other lithium ion modules directly as the input power supply; For the nickel-cadmium/nickel-hydrogen cell charging module, when the input voltage of selection circuit is 4.5V, suitably regulate current-limiting resistance R ₁Value, the USB5V power supply can be directly as the input power supply.

4. when the equipment of above three kinds of input modes does not all possess, still the battery that is full of electricity can be put into charging battery cartridge, utilize the circumscribed USB extended line to carry out emergent charging for mobile phone and mp3 conversely.Referring to accompanying drawing.

A kind of multifunctional charger has multiple peripheral hardware output function and multiple voltage input function, can give the battery charge of several different types of electronic products.These battery varieties comprise: (1) gives conventional 1.5V chargeable No.5 cell charging; (2) give mp3 or mp4 charging with lithium battery; (3) give digital phase, the Digital Video charging that lithium battery is arranged; (4) give 4.2V charging mobile phone battery with lithium battery.The multiple voltage input function, can realize the input of following several voltages: (1) all can provide the voltage of 5V earlier at the USB mouth of general computer, can use the USB interface of computer as the original input voltage of voltage; (2) all can provide the voltage output of 12V on the present automobile, can be used as voltage source; (3) the most conventional input voltage source of household voltage 220V also can be used as the input voltage source of this product.The voltage input mode is the 5V that is easy to get commonly used as the voltage of input voltage source, 12V, and 220V, increasing along with computer user, automobile have more, and the generally use of household voltage, and this product is well-adapted.Have multinomial voltage input function and multinomial voltage output function, but for the used battery of different electronic products.

Fig. 5, charger integration USB transmission line (G) inserts computer or independent USB input port, and by USB interface (A) VBUS pin and GND pin output 5V direct current, electric current exports required charging device to through chip AAT3680.

Charger integrated on-board electric power connection line (B) inserts in the interior cigar lighter of car, can be charger 12V is provided direct current, and direct current exports required charging device to through chip MAX712.

Charger integrated power supply plug (I) inserts in the common 220V socket, by pwm circuit, carries out rectification, filtering, is depressured to charger chips required input voltage (C), by another input pattern is provided for charger.

Cell-phone charging module (D) by the AAT3680 chip, is carried out cell-phone charging, and charger cell-phone charging module (D) contains a plurality of dissimilar handset ports, at the mobile phone of different model, and interface pattern difference.

Lithium electricity charging module (E) at the calling hierarchy difference of object, by selecting AAT3680 chip or MAX712 chip, charges to the digital product of supporting the USB charge function.This module comprises the USB connecting line of a standard, is connected to the USB input of equipment.

Ni-MH battery charging module (F), by integrated MAX712 chip, to No. 5 Ni-MH battery chargings, and the quantity of programmable Ni-MH battery to be charged (1～16 joint).This module connects a battery case by lead.

Input input 5V DC power supply, electric current is connected to chip AAT3680, and typical application circuit such as Fig. 2 detect resistance R _SENSEIn time, recharges and utilizes charging current to monitor charging current in the future through the pressure of out-of-date generation under the state, obtains the charging current feedback thus.By the continuous monitoring of the realization of the voltage between measurement TS and VSS pin to the lithium ion battery temperature, the thermistor in the lithium ion battery as temperature sensor, output signal is imported in the temperature detection comparator of AAT3680 after RT1 and RT2 dividing potential drop, compare with the threshold voltage of inside, whether allow charging, charging characteristic curve such as Fig. 1 with decision.After charging allowed, electric current was held the mobile phone charging interface of flowing through through BAT, is input on the cell phone mainboard, can begin to cell-phone charging.After the charging, charger is realized charged state output, provides a lithium ion cell charging state output via AAT3680 STAT function, and it is the serial data output of an opening, can export the different conditions function that shows 5 kinds of lithium ion batteries.The STAT section is connected with the VP section by a LED, and AAT3680 exports one group at every turn long information of 4 cycles, can express a certain state of lithium ion cell charging.Behind to be charged the finishing, LED light indication charging finishes.

Input input 12V DC power supply, electric current is connected to chip MAX712, and typical application circuit such as Fig. 4 change input resistance (R1=(U _Dcmin-5)/(5 * 10 ^-3)), the setting power input voltage is 12V, input current is 800mA.C ₁Be input filtering electric capacity, R ₁Be current-limiting resistance, the voltage of inner shunt regulator is 5V, with R1 the minimal power electric current that V+ holds is defined as 5mA, U _DCThrough R ₁To C ₂C is worked as in charging ₂Both end voltage U _C2=V ₊During=+ 5V, begin battery is carried out quick charge.

Shown voltage-type three-phase modulations PWM rectification circuit (Fig. 6), can realize the conversion of alternating current to direct current, and the output dc voltage size is adjustable arbitrarily, circuit is carried out sinusoidal wave PWM control, ac input end A, B, C at bridge can get sine pulse width modulation (PWM) impulse wave voltage, every voltage is controlled, as shown in Figure 7, output voltage U _o=(t _On/ T) * U _iThis shows, by pwm circuit, by changing t _OnBe worth size, can be required 5V of charger chips and 12V input voltage with public affairs frequency 220V voltage transition, thereby power for charger charges.

Claims (2)

1. a multifunctional charger is characterized in that: USB5V direct-flow input circuit, vehicle-mounted 12V direct-flow input circuit, the public input circuit of 220V alternating current are frequently arranged; The structure of USB5V direct-flow input circuit is: by a USB extended line, its wide mouth end inserts in the computer, and other end reservation+5V pressure-wire and earth connection insert mainboard AAT3680 pin;

The structure of vehicle-mounted 12V direct-flow input circuit is: by a vehicle power line, its round mouth termination is gone in the automobile cigarette lighter, and other end reservation+12V pressure-wire and earth connection insert mainboard MAX712 chip pin;

The structure of the public input circuit of 220V alternating current frequently is: by a two-seater plug, it can insert in the public 220V power supply frequently, and the line other end inserts in the mainboard PWM rectification circuit.

2. according to right 1 described a kind of multifunctional charger, it is characterized in that: replaceable handset port, slot USB line interface, No. 5 charging battery cartridges are arranged,

The structure of replaceable handset port is: is connected to cell phone mainboard AAT3680 output by interface pedestal, is inserted with dissimilar replaceable cellular phone power supplies interfaces on the base,

The structure of slot USB line interface is: inserted in the charging device by the slot end, its other end use+5V power line and ground wire insert charger AAT3680 and MAX712 chip output,

The structure of No. 5 charging battery cartridges is: be connected into the PWM rectification circuit output end by the battery case lead-in wire.

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