CN103326407A - Battery charging source detection shifting device and method - Google Patents
Battery charging source detection shifting device and method Download PDFInfo
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- CN103326407A CN103326407A CN2012100790025A CN201210079002A CN103326407A CN 103326407 A CN103326407 A CN 103326407A CN 2012100790025 A CN2012100790025 A CN 2012100790025A CN 201210079002 A CN201210079002 A CN 201210079002A CN 103326407 A CN103326407 A CN 103326407A
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Abstract
The invention provides a battery charging source detection shifting device and method. The device comprises a detection shifting unit and a control unit. The detection shifting unit outputs the voltage provided by a first voltage source and a second voltage source according to the coupling situation between the first voltage source, the second voltage source and a first input interface, a second input interface, wherein the output priority of the first voltage source is higher than that of the second voltage source. The control unit controls the detection shifting unit to connect on the first voltage source and the second voltage source simultaneously when the battery charging source detection shifting device is in an express charge mode.
Description
Technical field
The present invention is relevant a kind of electronic installation, and particularly detects switching device shifter and method relevant for a kind of charging source.
Background technology
Along with the rapid emergence of digital 3C industry, so that the development of the electric equipment products such as mobile phone, digital camera, digital code camera, palmtop PC (Personal DigitalAssistant, PDA) and portable computer is more flourishing and universal.Yet, the battery charger of above-mentioned electric equipment products mostly is greatly exclusive specification, therefore, when the user wants more to renew machine or changes brand, will be so that battery charger originally can't continue use, so not only can cause the waste of resource, allow user's burden increase, and can cause to environment the pollution of secondary.
Furthermore, European Union stipulates all charger for mobile phone because of the reason of response environmental protection in recent years, must be Small Universal serial bus (Micro Universal Serial Bus, Micro USB) charger, but because the charger power of Micro USB is less, the maximum constraints electric current is 1.5A, can't satisfy the charging interval demand of panel computer, therefore, many large factories just begin to design the to one's name charger of product, to meet design requirement in order to meet the specification of own product.
Different consumer product machines all have different charging designs, have dual mode to solve the problem of product interoperability, and the first is to wait for the unified charging of safety decree specification, follows specifications design.The second is when deisgn product, just considers mutually with the charging modes that is compatible to other, allows the consumer find at any time charger and prolongs service time of electronic product.Yet product design is oversimplified, so that the cost increase, and can reduce system safety, increase the generation of problem.
Summary of the invention
The invention provides a kind of charging source and detect switching device shifter and method, can make the electronic installation of using charging source detection switching device shifter be compatible to the charge voltage source of different size.
One embodiment of the invention proposes a kind of charging source and detects switching device shifter.Charging source detects switching device shifter and has first input end mouth and the second input port, is suitable for respectively coupling the first voltage source and second voltage source.Charging source detects switching device shifter and comprises detection switch unit and control unit.Detect switch unit and couple first input end mouth and the second input port, control unit couples the detection switch unit.
In the present embodiment, detect switch unit and export the voltage that the first voltage source and second voltage source provide according to the situation that couples of first, second voltage source and first, second input port, wherein the output priority of the first voltage source is higher than the second voltage source.Control signal was filled in output one soon when control unit was in fast mold filling formula at charging source detection switching device shifter, detected the charge path in switch unit while conducting the first voltage source and second voltage source with control.
In one embodiment of this invention, above-mentioned detection switch unit comprises the switch unit that couples first input end mouth and the second input port, and switch unit is exported the voltage that the first voltage source or second voltage source provide.
In one embodiment of this invention, above-mentioned switch unit comprises diode, P transistor npn npn, the first resistance.The anode of diode is suitable for coupling the first input end mouth, and the negative electrode of diode couples the output that charging source detects switching device shifter.The grid of P transistor npn npn and source electrode couple respectively anode and the negative electrode of diode, and the drain electrode of P transistor npn npn couples the second input port.The first resistance is coupled between the grid and ground connection of P transistor npn npn.
In one embodiment of this invention, above-mentioned switch unit comprises detecting unit and switch element.Detecting unit couples the output that charging source detects switching device shifter, and the detection charging source detects the output of switching device shifter, and produce a specification signal according to the output that charging source detects switching device shifter, wherein specification signal indication charging source detects the specification of the voltage that switching device shifter exports.Switch element is coupled in the second input port and charging source detects between the output of switching device shifter, and the conducting state of switch element is controlled by control unit.
In one embodiment of this invention, when charging source detection switching device shifter was in fast mold filling formula, control unit output was filled control signal soon with the actuating switch unit.
In one embodiment of this invention, above-mentioned switch element is a transistor.
In one embodiment of this invention, above-mentioned detecting unit comprises pressurizer, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first comparator, the second comparator, the 3rd comparator.Pressurizer couples the output that charging source detects switching device shifter, and produces the first reference voltage, the second reference voltage and the 3rd reference voltage according to the voltage of charging source detection switching device shifter output.The second to the 5th resistance string is connected between the output and ground connection of charging source detection switching device shifter.The positive input terminal of the first comparator couples the first reference voltage, and the negative input end of the first comparator couples the common joint of the second resistance, the 3rd resistance.The positive input terminal of the second comparator couples the second reference voltage, and the negative input end of the second comparator couples the common joint of the 3rd resistance, the 4th resistance.The positive input terminal of the 3rd comparator couples the 3rd reference voltage, and the negative input end of the 3rd comparator couples the common joint of the 4th resistance, the 5th resistance, the output output specification signal of the first to the 3rd comparator.
In one embodiment of this invention, charging source detection switching device shifter also comprises the first voltage protection circuit and second voltage protective circuit.The first voltage protection circuit is coupled to the first input end mouth and detects between the switch unit; whether the voltage that differentiating the first voltage source provides drops in the first predeterminated voltage scope, with the Voltage-output that determines whether the first voltage source to be provided to detecting switch unit.The second voltage protective circuit is coupled in the second input port and detects between the switch unit; whether the voltage that differentiating the second voltage source provides drops in the second predeterminated voltage scope, with the Voltage-output that determines whether the second voltage source to be provided to detecting switch unit.
One embodiment of the invention proposes a kind of charging source and detects changing method, is used for a charging source and detects switching device shifter, and charging source detects switching device shifter and has a first input end mouth and one second input port, is suitable for respectively coupling one first voltage source and a second voltage source.Charging source detects changing method and comprises the situation that couples that detects first, second voltage source and first, second input port; The situation that couples according to first, second voltage source and first, second input port is exported the voltage that the first voltage source and second voltage source provide, and wherein the output priority of the first voltage source is higher than the second voltage source; Judge that charging source detects switching device shifter and whether is in fast mold filling formula; And if charging source is when detecting switching device shifter and being in fast mold filling formula, simultaneously the charge path in conducting the first voltage source and second voltage source.
In one embodiment of this invention, charging source detects the output that changing method also comprises detection charging source detection switching device shifter; And produce a specification signal according to the output that charging source detects switching device shifter, wherein specification signal indication charging source detects the specification of the voltage that switching device shifter exports.
In one embodiment of this invention, charging source detects changing method and comprises also whether the voltage specification that detects first, second voltage source that couples with first, second input port falls within its corresponding predeterminated voltage scope, with decision whether with first, second voltage source as charge power supply.
Based on above-mentioned, the charging source of the embodiment of the invention detects switching device shifter and method can detect for the situation that couples between first, second voltage source and first, second input port, and optionally exports the voltage that first and second voltage source provides according to this.Further, when charging source detection switching device shifter entered fast mold filling formula, control unit can be controlled the charge path that detects first and second voltage source of simultaneously conducting of switch unit, to accelerate charging rate.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate accompanying drawing to be described in detail below.
Description of drawings
Figure 1A illustrates the electronic system schematic diagram of the application charging source detection switching device shifter of one embodiment of the invention;
Figure 1B is the electronic system schematic diagram that the application charging source of another embodiment of the present invention detects switching device shifter;
Fig. 2 A is the circuit diagram that the charging source of Figure 1A detects switching device shifter;
Fig. 2 B is the circuit diagram that the charging source of Figure 1B detects switching device shifter;
Fig. 3 A is the flow chart that the charging source of one embodiment of the invention detects changing method;
Fig. 3 B is the flow chart that the charging source of another embodiment of the present invention detects changing method.
Description of reference numerals:
100,100A, 200A, 200B: charging source detects switching device shifter;
110: the first input end mouth;
120: the second input ports;
130,130A: detect switch unit;
132: switch unit;
134: detecting unit;
136: switch element;
140: control unit;
150: the first voltage protection circuits;
160: the second voltage protective circuit;
170: charging chip;
180: battery;
190: electronic installation;
C1: the first comparator;
C2: the second comparator;
C3: the 3rd comparator;
D1: diode;
R1: the first resistance;
R2: the second resistance;
R3: the 3rd resistance;
R4: the 4th resistance;
R5: the 5th resistance;
T1: pressurizer;
The U1:P transistor npn npn;
F: fill soon control signal;
S: specification signal;
3000A, 3000B: method;
S3100, S3150, S3200, S3220, S3240, S3300, S3400, S3500: step.
Embodiment
Figure 1A illustrates the electronic system schematic diagram of the application charging source detection switching device shifter of one embodiment of the invention.Electronic system comprises that charging source detects switching device shifter 100, charging chip 170, battery 180 and electronic installation 190.Wherein charging source detects switching device shifter 100 and couples charging chip 170, and charging chip 170 couples battery 180 and electronic installation 190.Charging source detects switching device shifter 100 and has first input end mouth 110 and the second input port 120, is suitable for respectively coupling the first voltage source and second voltage source.Charging source detects switching device shifter 100 and comprises detection switch unit 130 and control unit 140.Detect switch unit 130 and couple first input end mouth 110 and the second input port 120, control unit 140 couples and detects switch unit 130.
In the present embodiment, detect switch unit 130 and export the voltage that the first voltage source and second voltage source provide according to first, second voltage source and first, second input port 110,120 the situation that couples, wherein the output priority of the first voltage source is higher than the second voltage source.For instance, the first voltage source can be AC transformer for example, and the second voltage source can for example be the USB power supply unit.Wherein the specification of AC transformer can for example be 9～19 volts voltage source and 1.5 amperes～4.7 amperes electric current is provided, and the specification of USB power supply unit can for example be 5 volts voltage source and 1.5 amperes electric current is provided.Relatively, first, second input port 110,120 can for example be respectively direct current (Direct Current, DC) circular hole or universal serial convergence bus (Universal Serial Bus, USB).It should be noted that above-mentioned voltage source and input only are an exemplary embodiment, the invention is not restricted to this, the number of input port and voltage source and kind can be adjusted according to designer's demand.
In addition, control signal F was filled in output one soon when control unit 140 was in fast mold filling formula at charging source detection switching device shifter 100, detected the charge path in 130 while of switch unit conducting the first voltage source and second voltage source with control.In other words, so rely on detection switch unit 130 to detect and switch and export the voltage that first, second voltage source provides, the charging source of the present embodiment detects switching device shifter can make charging chip 170 according to the output voltage that detects switch unit 130 battery 180 be charged, and then make electronic installation 190 can be compatible to simultaneously the voltage source of different size, and the mode that electronic installation 190 can full blast is charged.
Specifically, the detection switch unit 130 of the present embodiment can comprise switch unit 132, detecting unit 134 and switch element 136.Switch unit 132 couples first input end mouth 110 and the second input port 120, the voltage that it provides in order to export the first voltage source or second voltage source.The first voltage that switch unit 132 is exported or second voltage just can be by 180 chargings of 170 pairs of batteries of charging chip and to electronic installation 190 power supplies.
In addition, switch unit 132 output that can further be designed to the first voltage source has precedence over the output in second voltage source.For example, in the situation that being coupled in first, the second voltage source detects switch unit 130, if be coupled in after the first voltage source when detecting switch unit 130, switch unit 132 will switch charging path to the first voltage source, change the output of the first voltage source into the outputting cutting with the second voltage source again.Or be that first and second voltage source is coupled in when detecting switch unit 130 simultaneously, switch unit 132 selects the charging path to the first voltage source, with the Voltage-output that the first voltage source is provided.Thus, the charging source of the present embodiment detects just changeable suitable charge path of switching device shifter 100, and then selects the charge power supply of full blast to come by 180 chargings of 170 pairs of batteries of charging chip.
In addition, detecting unit 134 couples the output that charging source detects switching device shifter 100, detect the output of switching device shifter 100 to detect charging source, and produce a specification signal S according to the output that charging source detects switching device shifter 100, wherein specification signal S indication charging source detects the specification of the voltage that switching device shifter 100 exports.Particularly, detecting unit 134 is in order to differentiating the specification of first, second voltage source, and specification signal S is informed to charging chip 170, and so charging chip 170 can be learnt scope and the size of charging current.
In addition, switch element 136 is coupled in the second input port 120 and charging source detects between the output of switching device shifter 100, and the conducting state of switch element 136 is controlled by control unit 140.In the present embodiment, switch unit 132 all is coupled at first and second voltage source under the state of charging source detection switching device shifter 100, can preferentially export the first voltage source, that is the situations that detection switch unit 130 is preset provide single charging source.If the user wants to add the efficient of charging quickly, can make charging source detect switching device shifter 100 and enter fast mold filling formula, that is utilize control unit 140 outputs one to fill soon the charge path that control signal F makes switch element 136 conducting second voltage sources, allow the voltage in second voltage source also can export charging chip 170 to, so that electronic installation 190 is compatible in the voltage source of different size, and can promote the charge efficiency of battery 180.
Following content will be enumerated the working example of the detection switch unit of Figure 1A.Table one shows the detection switching behavior that the detection switch unit presents.
(table)
| Project | The first voltage source | The second voltage source | Output | State |
| 1 | Have | Nothing | The first voltage source | Standard charging |
| 2 | Nothing | Have | The second voltage source | The thread charging |
| 3 | Have | Have | The first voltage source | Direct current is preferential |
| 4 | Have | Have | First, second voltage source | Quick charge |
Please refer to table one, table one has shown that charging source detects switching device shifter 100 coupling situation and exporting situation for the first voltage source and second voltage source.In working example, the second voltage source is 5 volts voltage source and is coupled in charging source via universal serial convergence bus (Universal Serial Bus, USB) and detects switching device shifter 100.The first voltage source is general AC transformer, and providing for example is 9 volts～19 volts voltage, and is coupled in charging source by the direct current circular hole and detects switching device shifter 100.When only the first voltage source or second voltage source are coupled in first input end mouth 110 or the second input port 120, detect the voltage of switch unit 132 exportable the first voltage sources in the switch unit 130 or the voltage in second voltage source, and the voltage in second voltage source also can be exported by actuating switch unit 136.When the first voltage source and second voltage source are coupled in when detecting switch unit 130 simultaneously, the voltage of the first voltage source can preferentially be exported, and wish is when using quick charge, and actuating switch unit 136 is to allow the voltage in second voltage source and the voltage of the first voltage source export simultaneously again.
Referring again to Figure 1A, in order to protect the electronic installation 190 that is recharged, avoid unsuitable voltage source that excessive charging current is provided, charging source detects switching device shifter 100 can also comprise the first voltage protection circuit 150 and second voltage protective circuit 160.
The first voltage protection circuit 150 is coupled in first input end mouth 110 and detects between the switch unit 130; and whether the voltage of differentiating the first voltage source and providing drop in the first predeterminated voltage scope, with the Voltage-output that determines whether the first voltage source to be provided to detecting switch unit 130.Similarly; second voltage protective circuit 160 is coupled in the second input port 120 and detects between the switch unit 130; and whether the voltage of differentiating the second voltage source and providing drop in the second predeterminated voltage scope, with the Voltage-output that determines whether the second voltage source to be provided to detecting switch unit 130.Wherein the first predeterminated voltage and the second predeterminated voltage are associated with the use voltage specification of the electronic installation 190 that is recharged.In other words, first, second voltage source through the first voltage protection circuit 150 and second voltage protective circuit 160 differentiate whether meet the scope of predeterminated voltage after, just can by detecting unit 134 differentiation specifications, export again charging chip 170 to.
Figure 1B is the electronic system schematic diagram that the application charging source of another embodiment of the present invention detects switching device shifter.It is similar to the charging source detection switching device shifter 100 of Figure 1A that the charging source of Figure 1B detects switching device shifter 100A, and therefore identical element represents with identical label.The Main Differences that the charging source of the present embodiment detects the charging source detection switching device shifter 100 of switching device shifter 100A and Figure 1A is: in the present embodiment, detect switch unit 130A and comprise detecting unit 134 and switch element 136.Wherein detect the voltage that switch unit 130A exports the first voltage source predeterminablely, and the voltage in second voltage source can be exported or not export by the conducting situation of switch element 136.Because detecting unit 134 illustrates in the embodiment of Figure 1A with the effect of switch element 136, thereby does not repeat them here.
Fig. 2 A is the circuit diagram that the charging source of Figure 1A detects switching device shifter.Please refer to Fig. 2 A.In the present embodiment, switch element 136 is a transistor, for example is PNP transistor or NPN transistor.Switch unit 132 comprises diode D1, P transistor npn npn U1 and the first resistance R 1.Wherein the anode of diode D1 couples the first voltage protection circuit 150, and the negative electrode of diode D1 couples the output that charging source detects switching device shifter 200A.The grid of P transistor npn npn U1 and source electrode couple respectively anode and the negative electrode of diode D1, and the drain electrode of P transistor npn npn U1 couples the second input port 120 by second voltage protective circuit 160.The first resistance R 1 is coupled between the grid and ground connection of P transistor npn npn U1.When the first voltage source and second voltage source simultaneously or when successively being coupled to charging source and detecting switching device shifter 200A, the Voltage-output that the Voltage-output that can rely on the conducting state of P transistor npn npn U1 to control the first voltage source has precedence over the second voltage source (in the present embodiment, the voltage that the voltage that the first voltage source provides provides greater than the second voltage source, the first voltage source can for example be an AC transformer, and the second voltage source then can for example be a USB power supply unit).
Detecting unit 134 comprises pressurizer T1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the first comparator C 1, the second comparator C 2, the 3rd comparator C 3.Pressurizer T1 couples the output that charging source detects switching device shifter 200A, and produces the first reference voltage, the second reference voltage and the 3rd reference voltage according to the voltage of charging source detection switching device shifter 200A output.Second to the 5th resistance R 2～R5 is serially connected between the output and ground connection of charging source detection switching device shifter 200A.The positive input terminal of the first comparator C 1 couples the first reference voltage, and the negative input end of the first comparator C 1 couples the common joint of the second resistance R 2, the 3rd resistance R 3.The positive input terminal of the second comparator C 2 couples the second reference voltage, and the negative input end of the second comparator C 2 couples the common joint of the 3rd resistance R 3, the 4th resistance R 4.The positive input terminal of the 3rd comparator C 3 couples the 3rd reference voltage, and the negative input end of the 3rd comparator C 3 couples the common joint of the 4th resistance R 4, the 5th resistance R 5, the output output specification signal S of first to the 3rd comparator C 1～C3.
In addition, first voltage protection circuit 150 of the present embodiment, second voltage protective circuit 160 are made of a comparator, a transistor, a bleeder circuit (being made of two resistance) and a pressurizer respectively, and it couples relation shown in Fig. 2 A.Because its execution mode knows usually that by this area tool the knowledgeable is known, thereby do not repeat them here it and couple relation and move.
Particularly; when the first voltage source is coupled to first input end mouth 110 and the second input port 120 when not coupling with the second voltage source; if the voltage that the first voltage source provides drops in the first predeterminated voltage scope, the first voltage protection circuit 150 Voltage-output that the first voltage source is provided then.This moment, P transistor npn npn U1 closed because its grid voltage raises, make diode D1 conducting (so the time diode D1 anode voltage greater than cathode voltage), and then make charging source detect switching device shifter 200A to export the voltage that the first voltage source provides.
Similarly, when the first voltage source and second voltage source are coupled to respectively first input end mouth 110 and the second input port 120, if its voltage that provides drops on respectively in the first predeterminated voltage scope and the second predeterminated voltage scope, P transistor npn npn U1 also will be in closed condition (because its grid voltage is drawn high by the voltage that the first voltage source is provided), so charging source detection switching device shifter 200A also will export the voltage that the first voltage source provides this moment.Be in fast charge mode if it should be noted that charging source detection this moment switching device shifter 200A, control unit 140 is with actuating switch unit 136, so that the voltage that the second voltage source provides also can arrive charging chip 170, and then improves charge efficiency.
In addition; when the first voltage source is not coupled to first input end mouth 110 and the second input port 120 when coupling with the second voltage source; if the voltage that the second voltage source provides drops in the second predeterminated voltage scope, second voltage protective circuit 160 Voltage-output that the second voltage source is provided then.This moment, P transistor npn npn U1 was because of its grid and be not applied to voltage, and presented the state of conducting.Therefore, the voltage that provides of second voltage source can export charging chip 170 to via P transistor npn npn U1.This moment, diode D1 can prevent that the voltage that the second voltage source provides from pouring in down a chimney the output voltage values that affects charging source detection switching device shifter 200A to the first voltage protection circuit 150.
In addition, the specification signal S that exports of the detecting unit 134 of the present embodiment can indicate three kinds of different specifications.Shown in Fig. 2 A, charging source detects the reference voltage (for example 5 volts of (V)/0.5 ampere (A), 9V/1.5A and the 12V/3A shown in Fig. 2 A) that voltage that switching device shifter 200A exports can provide three different magnitudes of voltage after via pressurizer T1 voltage stabilizing.In addition, the bleeder circuit that the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 and the 5th resistance R 5 consist of can detect the voltage that switching device shifter 200A exports to charging source and carry out dividing potential drop, and then offers respectively the different dividing potential drop of negative input end of the first comparator C 1, the second comparator C 2, the 3rd comparator C 3.So can learn just that by the output voltage level height of judging the first comparator C 1, the second comparator C 2, the 3rd comparator C 3 charging source detects the voltage specification that switching device shifter 200A exports.
Fig. 2 B is the circuit diagram that the charging source of Figure 1B detects switching device shifter.Please refer to Fig. 2 B.The difference that the charging source of the present embodiment detects the charging source detection switching device shifter 200A of switching device shifter 200B and Fig. 2 A is; the output of first voltage protection circuit 150 of the present embodiment directly is coupled to the output that charging source detects switching device shifter 200B, and the output of second voltage protective circuit 160 only is coupled to switch element 136.
Shown in Fig. 2 B, suppose that the voltage that the first voltage source and second voltage source provide drops on respectively in the first predeterminated voltage scope and the second predeterminated voltage scope.When the first voltage source is coupled to first input end mouth 110 and the second input port 120 when not coupling with the second voltage source, the voltage that the first voltage source provides will directly be output.And when the first voltage source and second voltage source are coupled to respectively first input end mouth 110 and the second input port 120, if charging source detection this moment switching device shifter 200A is in non-fast charge mode, but control unit 140 closing switch unit 136 make charging source detect the voltage that the preferential output of switching device shifter 200B the first voltage source provides.On the contrary, if charging source detection this moment switching device shifter 200A is in fast charge mode, but control unit 140 actuating switch unit 136 so that the voltage that first, second voltage source provides all can arrive charging chip 170, and then improve charge efficiency.In addition, when the first voltage source is not coupled to first input end mouth 110 and the second input port 120 when coupling with the second voltage source, then can pass through control unit 140 actuating switch unit 136, so that the voltage that the second voltage source provides can arrive charging chip 170.
Fig. 3 A is the flow chart that the charging source of one embodiment of the invention detects changing method.Please refer to Fig. 3 A, concluding charging source that above-mentioned charging source detects switching device shifter detects changing method 3000A and can may further comprise the steps: detect first, second voltage source and first, second input port 110,120 couple situation (S3100), then, export the voltage (S3200) that the first voltage source and second voltage source provide according to first, second voltage source and first, second input port 110,120 the situation that couples, wherein the output priority of the first voltage source is higher than the second voltage source.Then judge that charging source detects switching device shifter 100 and whether is in fast mold filling formula (S3300), be in fast mold filling formula if charging source detects switching device shifter 100, then the charge path (S3400) in while conducting the first voltage source and second voltage source.On the contrary, switching device shifter 100 is non-to be in fast mold filling formula if charging source detects, then the corresponding charge path of voltage source (S3500) that couples mutually of conducting and input port.
Fig. 3 B is the flow chart that the charging source of another embodiment of the present invention detects changing method.In the embodiment of the present embodiment and Fig. 3 A, both main difference is as described below.Specifically, the charging source of the present embodiment detects changing method 3000B and also comprises the output (S3220) that detects charging source detection switching device shifter 100, and produce a specification signal (S3240) according to the output that charging source detects switching device shifter 100, wherein specification signal indication charging source detects the specification of the voltage that switching device shifter 100 exports.In addition, export before the voltage that the first voltage source and second voltage source provide according to first, second voltage source and first, second input port 110,120 the situation that couples, charging source detects changing method 3000B and comprises also whether the voltage specification that detects first, second voltage source that couples with first, second input port drops in its corresponding predeterminated voltage scope (S3150), with decision whether with first, second voltage source as charge power supply.
In sum, the charging source of the embodiment of the invention detects switching device shifter and method and can detect and switch for first and second voltage source, and optionally exports the voltage that first and second voltage source provides according to this.Further, when charging source detection switching device shifter was in fast mold filling formula, control unit can be controlled the charge path that detects first and second voltage source of simultaneously conducting of switch unit, to accelerate charging rate.Therefore it is compatible in the charge voltage source of different size that the charging source of using the embodiment of the invention detects the electronic installation of switching device shifter and method, also can make different voltage sources become simultaneously the charging source, increases charge efficiency.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (11)
1. a charging source detects switching device shifter, has a first input end mouth and one second input port, is suitable for respectively coupling one first voltage source and a second voltage source, and this charging source detects switching device shifter and comprises:
One detects switch unit, couple this first input end mouth and this second input port, the situation that couples according to this first voltage source, second voltage source and this first input end mouth, the second input port is exported the voltage that this first voltage source and this second voltage source provide, and wherein the output priority of this first voltage source is higher than this second voltage source; And
One control unit couples this detection switch unit, and control signal is filled in output one soon when this charging source detection switching device shifter is in fast mold filling formula, to control the charge path in this detection switch unit while this first voltage source of conducting and this second voltage source.
2. charging source according to claim 1 detects switching device shifter, and wherein this detection switch unit comprises:
One switches the unit, couples this first input end mouth and this second input port, exports the voltage that this first voltage source or this second voltage source provide.
3. charging source according to claim 2 detects switching device shifter, and wherein this switch unit comprises:
One diode, its anode are suitable for coupling this first input end mouth, and the negative electrode of this diode couples the output that this charging source detects switching device shifter;
One P transistor npn npn, its grid and source electrode couple respectively anode and the negative electrode of this diode, and the drain electrode of this P transistor npn npn couples this second input port; And
One first resistance is coupled between the grid and ground connection of this P transistor npn npn.
4. charging source according to claim 1 detects switching device shifter, and wherein this detection switch unit comprises:
One detecting unit, couple the output that this charging source detects switching device shifter, detect the output that this charging source detects switching device shifter, and produce a specification signal according to the output that this charging source detects switching device shifter, wherein this specification signal indicates this charging source to detect the specification of the voltage that switching device shifter exports; And
One switch element is coupled between the output of this second input port and this charging source detection switching device shifter, and the conducting state of this switch element is controlled by this control unit.
5. charging source according to claim 4 detects switching device shifter, and wherein when this charging source detection switching device shifter was in fast mold filling formula, this control unit was exported this and filled soon control signal with this switch element of conducting.
6. charging source according to claim 4 detects switching device shifter, and wherein this switch element is a transistor.
7. charging source according to claim 4 detects switching device shifter, and wherein this detecting unit comprises:
One pressurizer couples the output that this charging source detects switching device shifter, and the voltage that detects switching device shifter output according to this charging source produces one first reference voltage, one second reference voltage and one the 3rd reference voltage;
One second resistance;
One the 3rd resistance;
One the 4th resistance;
One the 5th resistance, this second resistance, the 3rd resistance, the 4th resistance and the 5th resistance string are connected between the output and ground connection of this charging source detection switching device shifter;
One first comparator, its positive input terminal couple this first reference voltage, and the negative input end of this first comparator couples the common joint of this second resistance, the 3rd resistance;
One second comparator, its positive input terminal couple this second reference voltage, and the negative input end of this second comparator couples the common joint of the 3rd resistance, the 4th resistance; And
One the 3rd comparator, its positive input terminal couples the 3rd reference voltage, and the negative input end of the 3rd comparator couples the common joint of the 4th resistance, the 5th resistance, and the output of this first comparator, the second comparator and the 3rd comparator is exported this specification signal.
8. charging source according to claim 1 detects switching device shifter, also comprises:
One first voltage protection circuit, be coupled between this first input end mouth and this detection switch unit, whether the voltage that differentiating this first voltage source provides drops in the one first predeterminated voltage scope, detects switch unit to determine the Voltage-output that whether this first voltage source is provided to this; And
One second voltage protective circuit; be coupled between this second input port and this detection switch unit; whether the voltage that differentiating this second voltage source provides drops in the one second predeterminated voltage scope, detects switch unit to determine the Voltage-output that whether this second voltage source is provided to this.
9. a charging source detects changing method, be applicable to a charging source and detect switching device shifter, this charging source detects switching device shifter and has a first input end mouth and one second input port, is suitable for respectively coupling one first voltage source and a second voltage source, and this charging source detects changing method and comprises:
Detect the situation that couples of this first voltage source, second voltage source and this first input end mouth, the second input port;
The situation that couples according to this first voltage source, second voltage source and this first input end mouth, the second input port is exported the voltage that this first voltage source and this second voltage source provide, and wherein the output priority of this first voltage source is higher than this second voltage source;
Judge that this charging source detects switching device shifter and whether is in fast mold filling formula; And
When if this charging source detection switching device shifter is in fast mold filling formula, the charge path in while this first voltage source of conducting and this second voltage source.
10. charging source according to claim 9 detects changing method, also comprises:
Detect the output that this charging source detects switching device shifter; And
The output that detects switching device shifter according to this charging source produces a specification signal, and wherein this specification signal indicates this charging source to detect the specification of the voltage that switching device shifter exports.
11. charging source according to claim 9 detects changing method, also comprises:
Detect this first voltage source that couples with this first input end mouth, the second input port, whether the voltage specification in second voltage source drops in its corresponding predeterminated voltage scope, with decision whether with this first voltage source, second voltage source as charge power supply.
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| CN2012100790025A CN103326407A (en) | 2012-03-22 | 2012-03-22 | Battery charging source detection shifting device and method |
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| CN2012100790025A CN103326407A (en) | 2012-03-22 | 2012-03-22 | Battery charging source detection shifting device and method |
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Application publication date: 20130925 |