CN104092274A - Intelligent charger with output voltage changing function - Google Patents

Intelligent charger with output voltage changing function Download PDF

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Publication number
CN104092274A
CN104092274A CN201410364576.6A CN201410364576A CN104092274A CN 104092274 A CN104092274 A CN 104092274A CN 201410364576 A CN201410364576 A CN 201410364576A CN 104092274 A CN104092274 A CN 104092274A
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China
Prior art keywords
charger
output voltage
processing unit
power subsystem
intelligent
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CN201410364576.6A
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Chinese (zh)
Inventor
章云芳
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深圳市至高通信技术发展有限公司
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Priority to CN201410364576.6A priority Critical patent/CN104092274A/en
Publication of CN104092274A publication Critical patent/CN104092274A/en

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Abstract

The invention discloses an intelligent charger with an output voltage changing function. The intelligent charger comprises a processing unit, a power unit and an interface unit. The processing unit is connected with the power unit and the interface unit. The power unit is connected with the interface unit. The interface unit is connected with an external intelligent terminal. The processing unit conducts handshake and communication with the intelligent terminal through the interface unit and controls the output voltage of the power unit according to handshake and communication results so that the output voltage of the power unit can reach the requirements of the intelligent terminal. The intelligent charger can intelligently switch the output voltages according to the requirements of the intelligent terminal to charge the intelligent terminal and accelerate charging. The invention further discloses a charging method applied to the intelligent charger.

Description

A kind of intelligent alterable changes the charger of output voltage

Technical field

The present invention relates to the communications field, the charger and the charging method that particularly relate to a kind of intelligent alterable and change output voltage.

Background technology

Because intelligent terminal screen is larger, apply manyly, make the power consumption of intelligent terminal increasing, the battery capacity of corresponding intelligent terminal also improves constantly, and makes the charging interval more and more longer, and user is long more and more dissatisfied to the charging interval.

Summary of the invention

The technical problem that the present invention mainly solves is that the charging interval of intelligent terminal is longer, is necessary to provide a kind of intelligent alterable of accelerating charging rate to change charger and the charging method of output voltage.

For solving the problems of the technologies described above, the invention provides the charger that a kind of intelligent alterable changes output voltage, it comprises processing unit, power subsystem and interface unit, described processing unit connects described power subsystem and interface unit, described power subsystem connects described interface unit, described interface unit connects external smart terminal, described processing unit is shaken hands and is communicated by letter by interface unit and intelligent terminal, control the output voltage of described power subsystem with the result of communicating by letter according to shaking hands, make the output voltage of described power subsystem reach the requirement of intelligent terminal.

Further, described processing unit is central processing unit or microprocessor, and described power subsystem is output voltage controllable electric power unit, and described interface unit is USB interface.

Further, in the time that described processing unit does not send instruction to described power subsystem, the default output voltage of described power subsystem is+5V that, in the time that described processing unit sends instruction to described power subsystem, described power subsystem is exported corresponding voltage according to the instruction of described processing unit.

Further, described power subsystem comprises switch, switches the magnitude of voltage of output by described switch.

Further, described switch is single pole multiple throw, described power subsystem switches described single pole multiple throw under described processing unit control, and the intelligent terminal of described processing unit and connecting charger carries out handshake communication, and controls single pole multiple throw by the requirement of described intelligent terminal.

Further, described power subsystem comprises DC/DC translation circuit, pull-up resistor and pull down resistor, the output voltage V of described power subsystem+the be connected to VBUS end of interface unit, and successively by described pull-up resistor and pull down resistor ground connection, node between described pull-up resistor and pull down resistor is electrically connected to described DC/DC translation circuit as feedback end, described pull down resistor is adjustable resistance, described processing unit connects described pull down resistor and can control the resistance value size of described pull down resistor VR, in the time of the resistance value of voltage of transformation sampling pull down resistor, the reference voltage of feedback also and then changes, VD V+ also and then changes, described in described processing unit control, the output voltage values of power subsystem is realized the continuous transformation output of output voltage.

Further, the charger that described intelligent alterable changes output voltage comprises processing unit, power subsystem, interface unit, AD conversion unit, voltage difference amplifier and current sampling resistor, described current sampling resistor is arranged between power subsystem and interface unit, for the size of the output current of sampling, the output current that described AD conversion unit obtains sampling sends to processing unit to process after being converted to digital signal, described processing unit comprises central processing unit, the size of current of described power subsystem output judged and controls by described central processing unit according to the digital signal receiving, described processing unit can be according to power subsystem output described in the Digital Signals of the corresponding output current size receiving or powered-down output.

The charging method that the present invention also provides a kind of intelligent alterable to change output voltage, comprises step S01, connects intelligent charger and intelligent terminal; Step S02, the initial output voltage of intelligent charger is+5V that intelligent terminal detects intelligent charger; Step S03, intelligent terminal is configured and is sent instructions to charger by USB by self, makes charger export suitable quick charge voltage; Step S04, whether charger receive instruction and reply, and "Yes" jumps to step S05, and "No" jumps to step S07; Step S05, intelligent terminal is received replying of charger, is ready to rear notice charger; Step S06, charger is by the requirement output charging voltage of intelligent terminal and start quick charge; Step S07, intelligent terminal is confiscated replying of charger, continue routinely+5V charging.

The invention has the beneficial effects as follows: 1, improve the power output of charger by the method that improves output voltage, to meet the demand of terminal to high-power quick charge; 2, charger has carrying out shake communication function, can and intelligent terminal is shaken hands and communication; 3, this patent charger carries out carrying out shake communication by USB charging inlet and intelligent terminal, and can export different charging voltages by the demand of intelligent terminal; 4, the variable output voltage of charger is mainly realized by following two kinds of methods: one is the output that realizes intelligent charger multiple voltage by the switching of single pole multiple throw; Its two for a change charger voltage transformation parameter realize intelligent charger continuous voltage change output; 5, this patent charger is protected own and load terminal by detecting the size of output current, ensures the safety of work system.The present invention has the charger of carrying out shake communication function to improve power output by the method that improves output voltage, thereby meets the demand of intelligent terminal quick charge and high-power power supply.

Brief description of the drawings

Fig. 1 is the connection diagram of execution mode and the intelligent terminal of a kind of intelligent alterable of the present invention charger of changing output voltage;

Fig. 2 is the schematic diagram that intelligent alterable shown in Fig. 1 changes the charger of output voltage;

Fig. 3 is the power subsystem structural representation of the charger that changes output voltage of intelligent alterable shown in Fig. 1;

Fig. 4 is the schematic diagram that intelligent alterable shown in Fig. 1 changes another execution mode of the charger of output voltage;

Fig. 5 is the frame structure schematic diagram that a kind of intelligent alterable of the present invention changes another execution mode of the charger of output voltage;

Fig. 6 is the schematic flow sheet that intelligent alterable of the present invention changes the charging method of output voltage.

Embodiment

In order to shorten the charging interval, must carry out quick charge, realize quick charge and must improve charge power, improve charge power and must have powerful charger, traditional high-power charger is to increase output current under the constant prerequisite of output voltage, increase output current and can be subject to charging inlet, the restriction of the maximum current that the devices such as charging line allow, therefore be very restricted by the power output that increases the method for output current and improve charger, this patent has proposed to improve by the method that increases output voltage the power output of charger, charger energy and intelligent terminal carrying out shake communication simultaneously, the instruction of sending out according to intelligent terminal carrys out regulation output voltage, farthest meet the demand of intelligent terminal quick charge.Therefore the charger and the charging method that, the invention provides a kind of intelligent alterable that can shorten the charging interval and change output voltage.

The present invention is exactly the power output that improves charger within the scope that supply current allows at devices such as general-purpose interface device, charge power supply lines by the method that improves charger output voltage ensureing.

The power output formula of charger is: P=U × I

Power output, the U that wherein P is charger is that output voltage, I are output current.

Can find out from above formula, in the situation that output current of charger I is constant, its power output P proportional raising with the raising of output voltage U.Therefore the present invention improves output voltage in the situation that keeping outputting current steadily, thereby adds charging quickly.

Below in conjunction with Figure of description of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.For convenience of description, " charger " cited below or " intelligent charger " all refer to intelligent alterable of the present invention and change the charger of output voltage.

Referring to Fig. 1, is the connection diagram of execution mode and the intelligent terminal of the intelligent alterable of the present invention charger that changes output voltage.One end that described intelligent alterable changes the charger 1 of output voltage connects external communication electricity, and the other end is connected with intelligent terminal 2 to be charged.As shown in the figure, wherein VBUS is charging positive supply, is the positive supply of intelligent charger to intelligent terminal charging or power supply; Described positive supply VBUS and ground have formed the electric power loop that charger charges and powers to intelligent terminal; D+/D-is used for transmitting data when communication between charger and intelligent terminal; ID is used for detecting.

Please refer to Fig. 2, the charger 1 of convertible output voltage shown in Fig. 1 comprises processing unit 10, power subsystem 20 and interface unit 30.Described processing unit 10 is central processing unit (CPU) or microprocessor (MCU), and described power subsystem 20 is output voltage controllable electric power unit, and described interface unit 30 is USB interface.Described processing unit 10 connects described power subsystem 20 and interface unit 30.Described power subsystem 20 connects described interface unit 30.Described interface unit 30 connects external smart terminal.Described processing unit 10 is shaken hands and is communicated by letter with intelligent terminal by the USB interface of interface unit 30, control the output voltage of described power subsystem 20 with the result of communicating by letter according to shaking hands, make the output voltage of described power subsystem 20 reach the requirement of intelligent terminal, thereby reach the object of carrying out quick charge with high voltage.

The output voltage of power subsystem 20 is to be controlled by described processing unit 10, and described processing unit 10 regulates the output voltage of described power subsystem 10 according to the demand of intelligent terminal.In the time that described processing unit 10 does not send instruction to described power subsystem 20, the default output voltage of described power subsystem 20 is+5V, with common charger is compatible mutually on the market.In the time that described processing unit 10 sends instruction to described power subsystem 20, described power subsystem 20 is exported corresponding voltage according to the instruction of described processing unit 10, thereby accelerates the charging to intelligent terminal by Intelligent Transformation output voltage.

Described interface unit 30 is that charger and the communicating by letter of intelligent terminal that described intelligent alterable changes output voltage connects.In the above-mentioned execution mode of the present invention, described interface unit 30 adopts usb mode, the interface of intelligent terminal being powered and being charged by VBUS and ground.The VBUS of described USB interface and common USB interface are different, and the default voltage of VBUS of this USB interface is+5V that voltage can raise to meet the demand of quick charge in the time of quick charge.

Meanwhile, the interchange input interface that the present invention adopts can meet civil power alternating voltage and the frequency of countries in the world, is that wide voltage exchanges input interface.

Referring to Fig. 3, is the power subsystem structural representation that intelligent alterable changes the charger of output voltage described in Fig. 1.Described power subsystem 20 comprises K switch, switches the magnitude of voltage of output by described K switch, as+5V, V1, V2 etc.In the present embodiment, described K switch is single pole multiple throw.When work, described power subsystem 20 switches described single pole multiple throw K under described processing unit 10 is controlled, thus the different Voltage-outputs such as realization+5V, V1, V2.The intelligent terminal 2 of described processing unit 20 and connecting charger carries out handshake communication, and controls single pole multiple throw by the requirement of described intelligent terminal 2, makes the voltage of charger output meet the requirement of intelligent terminal 2.Final realization realizes the requirement of high-power quick charge with high voltage.In the above-described embodiment, V2 > V1 >+5V, charger is exported voltage V1 or the V2 of different stage according to the requirement of intelligent terminal 2, thereby realizes quick charge.

Referring to Fig. 4, is the schematic diagram that intelligent alterable changes another execution mode of the charger of output voltage described in Fig. 1.

In the present embodiment, described power subsystem 20 comprises DC/DC translation circuit, pull-up resistor R and pull down resistor VR.The output voltage V of described power subsystem 20+be connected to the VBUS end of interface unit 30, and successively by described pull-up resistor R and pull down resistor VR ground connection.Node A between described pull-up resistor R and pull down resistor VR is electrically connected to described DC/DC translation circuit as feedback end.Described pull down resistor VR is adjustable resistance, and described processing unit 10 connects described pull down resistor VR and can control the resistance value size of described pull down resistor VR.

Described power subsystem 20 is adjusted electric power output voltage and can be met the requirement of terminal being carried out to high-power quick charge by the method that improves charger output voltage by the resistance value of adjusting in voltage transformation feedback circuit.The reference voltage of the feedback that further, A is ordered is:

VA=[V+/(R+VR)]*VR

Wherein, VA represents the magnitude of voltage at A place, is also the reference voltage level of Voltage Feedback.The reference voltage of described DC/DC translation circuit sampling feedback end A place feedback,

In the time of the resistance value of voltage of transformation sampling pull down resistor VR, the reference voltage VA that can obtain feedback according to above formula also and then changes, the reference voltage of feedback has changed, VD V+ also and then changes, thereby realizes the continuous transformation output of output voltage by the output voltage values that processing unit 10 is controlled described power subsystem 20.

In above-mentioned execution mode, the charger that a kind of intelligent alterable of the present invention changes output voltage all can reach the object of regulation output voltage, and final realization improves power output by the method that improves charger output voltage, the satisfied demand that terminal is carried out to high-power quick charge.

Referring to Fig. 5, is the frame structure schematic diagram that a kind of intelligent alterable of the present invention changes another execution mode of the charger of output voltage.The charger that described intelligent alterable changes output voltage comprises processing unit 10, power subsystem 20, interface unit 30, AD conversion unit 40, voltage difference amplifier 50 and current sampling resistor R.Described current sampling resistor R is arranged between power subsystem 20 and interface unit 30, for the size of the output current of sampling.The output current that described AD conversion unit 40 (being called again ADC converting unit) obtains sampling sends to processing unit 10 to process after being converted to digital signal.Described processing unit 10 comprises central processing unit, and described central processing unit is judged according to the digital signal receiving and controlled the size of current that described power subsystem 10 is exported.When work, described processing unit 10 can be exported or powered-down output according to power subsystem 20 described in the Digital Signals of the corresponding output current size receiving, to ensure the safety of whole charging system (charger and intelligent terminal).

Referring to Fig. 6, is the schematic flow sheet that intelligent alterable of the present invention changes the charging method of output voltage.The charging method that intelligent alterable of the present invention changes output voltage comprises:

Step S01, connects intelligent charger and intelligent terminal;

Step S02, the initial output voltage of intelligent charger is+5V that intelligent terminal detects intelligent charger;

Step S03, intelligent terminal is configured and is sent instructions to charger by USB by self, makes charger export suitable quick charge voltage;

Step S04, whether charger receive instruction and reply, and "Yes" jumps to step S05, and "No" jumps to step S07;

Step S05, intelligent terminal is received replying of charger, is ready to rear notice charger;

Step S06, charger is by the requirement output charging voltage of intelligent terminal and start quick charge;

Step S07, intelligent terminal is confiscated replying of charger, continue routinely+5V charging.

Compared to prior art, beneficial effect of the present invention is:

1, improve the power output of charger by the method that improves output voltage, to meet the demand of terminal to high-power quick charge.

2, charger has carrying out shake communication function, can and intelligent terminal is shaken hands and communication.

3, this patent charger carries out carrying out shake communication by USB charging inlet and intelligent terminal, and can export different charging voltages by the demand of intelligent terminal.

4, the variable output voltage of charger is mainly realized by following two kinds of methods: one is the output that realizes intelligent charger multiple voltage by the switching of single pole multiple throw; Its two for a change charger voltage transformation parameter realize intelligent charger continuous voltage change output.

5, this patent charger is protected own and load terminal by detecting the size of output current, ensures the safety of work system.

The present invention has the charger of carrying out shake communication function to improve power output by the method that improves output voltage, thereby meets the demand of intelligent terminal quick charge and high-power power supply.

The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (8)

1. an intelligent alterable changes the charger of output voltage, it is characterized in that, comprise processing unit, power subsystem and interface unit, described processing unit connects described power subsystem and interface unit, described power subsystem connects described interface unit, described interface unit connects external smart terminal, described processing unit is shaken hands and is communicated by letter by interface unit and intelligent terminal, control the output voltage of described power subsystem with the result of communicating by letter according to shaking hands, make the output voltage of described power subsystem reach the requirement of intelligent terminal.
2. intelligent alterable according to claim 1 changes the charger of output voltage, it is characterized in that, described processing unit is central processing unit or microprocessor, and described power subsystem is output voltage controllable electric power unit, and described interface unit is USB interface.
3. intelligent alterable according to claim 1 changes the charger of output voltage, it is characterized in that, in the time that described processing unit does not send instruction to described power subsystem, the default output voltage of described power subsystem is+5V, in the time that described processing unit sends instruction to described power subsystem, described power subsystem is exported corresponding voltage according to the instruction of described processing unit.
4. intelligent alterable according to claim 3 changes the charger of output voltage, it is characterized in that, described power subsystem comprises switch, switches the magnitude of voltage of output by described switch.
5. intelligent alterable according to claim 4 changes the charger of output voltage, it is characterized in that, described switch is single pole multiple throw, described power subsystem switches described single pole multiple throw under described processing unit control, the intelligent terminal of described processing unit and connecting charger carries out handshake communication, and controls single pole multiple throw by the requirement of described intelligent terminal.
6. intelligent alterable according to claim 5 changes the charger of output voltage, it is characterized in that, described power subsystem comprises DC/DC translation circuit, pull-up resistor and pull down resistor, the output voltage V of described power subsystem+the be connected to VBUS end of interface unit, and successively by described pull-up resistor and pull down resistor ground connection, node between described pull-up resistor and pull down resistor is electrically connected to described DC/DC translation circuit as feedback end, described pull down resistor is adjustable resistance, described processing unit connects described pull down resistor and can control the resistance value size of described pull down resistor VR, in the time of the resistance value of voltage of transformation sampling pull down resistor, the reference voltage of feedback also and then changes, VD V+ also and then changes, described in described processing unit control, the output voltage values of power subsystem is realized the continuous transformation output of output voltage.
7. intelligent alterable according to claim 1 changes the charger of output voltage, it is characterized in that, the charger that described intelligent alterable changes output voltage comprises processing unit, power subsystem, interface unit, AD conversion unit, voltage difference amplifier and current sampling resistor, described current sampling resistor is arranged between power subsystem and interface unit, for the size of the output current of sampling, the output current that described AD conversion unit obtains sampling sends to processing unit to process after being converted to digital signal, described processing unit comprises central processing unit, the size of current of described power subsystem output judged and controls by described central processing unit according to the digital signal receiving, described processing unit can be according to power subsystem output described in the Digital Signals of the corresponding output current size receiving or powered-down output.
8. intelligent alterable changes a charging method for output voltage, it is characterized in that, comprising:
Step S01, connects intelligent charger and intelligent terminal;
Step S02, the initial output voltage of intelligent charger is+5V that intelligent terminal detects intelligent charger;
Step S03, intelligent terminal is configured and is sent instructions to charger by USB by self, makes charger export suitable quick charge voltage;
Step S04, whether charger receive instruction and reply, and "Yes" jumps to step S05, and "No" jumps to step S07;
Step S05, intelligent terminal is received replying of charger, is ready to rear notice charger;
Step S06, charger is by the requirement output charging voltage of intelligent terminal and start quick charge;
Step S07, intelligent terminal is confiscated replying of charger, continue routinely+5V charging.
CN201410364576.6A 2014-07-29 2014-07-29 Intelligent charger with output voltage changing function CN104092274A (en)

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