CN104821722B - A kind of dc source application circuit and dc source conversion equipment - Google Patents
A kind of dc source application circuit and dc source conversion equipment Download PDFInfo
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- CN104821722B CN104821722B CN201510219857.7A CN201510219857A CN104821722B CN 104821722 B CN104821722 B CN 104821722B CN 201510219857 A CN201510219857 A CN 201510219857A CN 104821722 B CN104821722 B CN 104821722B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/0093—Converters characterised by their input or output configuration wherein the output is created by adding a regulated voltage to or subtracting it from an unregulated input
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- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of dc source application circuit and dc source conversion equipment, including N roads DC supply input circuit, N roads decision circuitry, M roads compare output circuit and M roads indicating circuit；N roads decision circuitry connects N roads DC supply input circuit respectively, and the output end of N roads decision circuitry all connects the output end of dc source application circuit；The input for comparing output circuit per road all connects the output end of N roads decision circuitry；Per road indicating circuit one end, output circuit, the output end of other end connection N roads decision circuitry are compared in connection all the way.Judge whether output current meets high current demand by the switch key of pressing instruction circuit；If the light emitting diode of indicating circuit does not light, illustrate that needs continue to connect DC supply input, in the case where increasing to the D.C. power requirement of High-current output, be effectively utilized the dc source of output low current, it is to avoid waste.
Description
Technical field
The invention belongs to power circuit design field, specifically, be related to a kind of dc source application circuit and
Dc source conversion equipment with the dc source application circuit.
Background technology
, it is necessary to use power supply adaptor when being charged for the mobile terminal such as mobile phone, PAD.Power supply adaptor
DC voltage needed for 220V alternating voltages to be converted to mobile terminal charges for mobile terminal, and its output current is general in 1A-
In the range of 2A.
With the extension and the development of technology of mobile terminal performance, the capacity of battery of mobile terminal is also gradually increasing, then
Need the charging current exported also in increase along with the power supply adaptor charged for mobile terminal, the problem of this brings is,
The small power supply adaptor of some output currents is eliminated and produces waste.
The content of the invention
, can be less by output current this application provides a kind of dc source application circuit and dc source conversion equipment
DC supply input is integrated into the dc source of larger current output, is effectively utilized the small power supply adaptor of output current, keeps away
Exempt to waste.
In order to solve the above technical problems, the application is achieved using following technical scheme：
Propose a kind of dc source application circuit, including N roads DC supply input circuit, in addition to N roads decision circuitry, M
Compare output circuit, M roads indicating circuit in road；N roads decision circuitry connects N roads DC supply input circuit respectively, often
Road decision circuitry realizes turn-on and turn-off according to the input of dc source；The output end of N roads decision circuitry all connects described
The output end of dc source application circuit；The input for comparing output circuit per road all connects the output of N roads decision circuitry
End；Compare output circuit per road to be compared with setting value by the difference between being inputted end, realize and compare output per road
The turn-on and turn-off of circuit；Per road indicating circuit one end, output circuit is compared in connection all the way, and the other end connects the N roads and judges electricity
The output end on road, when the output end of N roads decision circuitry imposes a condition with being compared the output end difference satisfaction of output circuit,
Indicating circuit ON operation；Wherein described N, M are the positive integer more than or equal to 1.
Further, judge that process circuit includes first switch pipe, second switch pipe, the first divider resistance, second per road
Divider resistance, dropping resistor and diode；The first end of first divider resistance, the first end of the dropping resistor and described
The second input connection of first switch pipe is with DC supply input circuit all the way；The second end connection of first divider resistance
The first end of second divider resistance, the second end ground connection of second divider resistance；Second end of the dropping resistor and
The first input end of the first switch pipe all connects the second input of the second switch pipe, the of the second switch pipe
One input connects the second end of first divider resistance, the output head grounding of the second switch pipe；The first switch
The output end of pipe connects the positive pole of the diode, and the negative pole of the diode connects the output of the dc source application circuit
End.
Further, output circuit is compared per road includes switch key, the 3rd divider resistance, the 4th divider resistance, the 3rd
Switching tube and comparator；The first end of the switch key connects the output end of N roads decision circuitry, the switch key
Second end connects the first end of the 3rd divider resistance and the first input end of the comparator, the 3rd divider resistance
Second end connects the first end of the 4th divider resistance and the second input of the comparator, the 4th divider resistance
Second end is grounded；The output end of the comparator connects the first input end of the 3rd switching tube, the second of the 3rd switching tube
Input connects indicating circuit, the output head grounding of the 3rd switching tube all the way.
Further, light emitting diode is included per road indicating circuit, when indicating circuit is turned on, the light emitting diode hair
Light；Or include buzzer, when indicating circuit is turned on, the buzzer warning per road indicating circuit；Or per road indicating circuit bag
Display screen is included, when indicating circuit is turned on, the display screen work.
Further, the switch key is four contact switch buttons, and the first contact of the four contact switch button connects
Two inputs of the comparator are connect, the second contact portion comparator power supply of the four contact switch button is described
The output end of N roads decision circuitry described in 3rd contact of four contact switch buttons and the 4th contact portion.
Further, the second switch pipe and the 3rd switching tube are NPN triode；The second switch pipe and institute
The first input end for stating the 3rd switching tube is the base stage of NPN triode, the of the second switch pipe and the 3rd switching tube
Two inputs are the colelctor electrode of NPN triode, and the output end of the second switch pipe and the 3rd switching tube is NPN triode
Emitter stage.
Further, the 3rd switching tube is NMOS FETs；The first input end of 3rd switching tube is
The grid of NMOS FETs, the second input of the 3rd switching tube is the drain electrode of NMOS FETs, and the described 3rd opens
The output end for closing pipe is the source electrode of NMOS FETs.
Further, the first switch pipe is PMOS FETs；The first input end of the first switch pipe is
The grid of PMOS FETs, the second input of the first switch pipe is the source electrode of PMOS FETs, and described first opens
The output end for closing pipe is the drain electrode of PMOS FETs.
Further, the first switch pipe is PNP triode；The first input end of the first switch pipe is PNP tri-
The base stage of pole pipe, the second input of the first switch is the emitter stage of PNP triode, the output end of the first switch pipe
For the colelctor electrode of PNP triode.
Propose a kind of dc source conversion equipment, including N number of power input terminal, dc source application circuit and M electricity
Source output terminal；The dc source application circuit includes N roads DC supply input circuit, in addition to N roads decision circuitry, M roads
Compare output circuit, M roads indicating circuit；N roads decision circuitry connects N roads DC supply input circuit respectively, per road
Decision circuitry realizes turn-on and turn-off according to the input of dc source；The output end of N roads decision circuitry all connects described straight
Flow the output end of power supply application circuit；The input for comparing output circuit per road all connects the output end of N roads decision circuitry；
Compare output circuit per road to be compared with setting value by the difference between being inputted end, realize and compare output circuit per road
Turn-on and turn-off；Per road indicating circuit one end, output circuit is compared in connection all the way, other end connection N roads decision circuitry
Output end, when the output end of N roads decision circuitry imposes a condition with being compared the output end difference satisfaction of output circuit, is indicated
Circuit turn-on works；N number of power input terminal connects the N roads DC supply input electricity of the dc source application circuit
Road, the output end of the dc source application circuit connects the M power output terminal, wherein, M, N are more than or equal to 1
Integer.
Compared with prior art, the advantage and good effect of the application is：The dc source application circuit that the application is proposed
In dc source conversion equipment, including N roads DC supply input circuit, N roads decision circuitry, M roads compare output circuit and M roads
Indicating circuit；Can be inputted per road DC supply input circuit all the way dc source to decision circuitry all the way, such as power adaptation
The dc source of device output, when decision circuitry judges that the dc source of input meets minimum input voltage condition, output input
Dc source；When on N roads, the input of DC supply input circuit all meets minimum output voltage condition, N roads DC supply input
Exported after the judgement of N roads decision circuitry；Because the output end of N roads decision circuitry all connects the output of dc source application circuit
End, then N roads decision circuitry is parallel connectivity in circuit connection, then based on parallel connection the characteristics of, it is in parallel after dc source
It is output as the Parallel opertation of N roads DC supply input, namely the electric current summation that output current is N roads DC supply input so that
The electric current increase of dc source output, the need for the output current of increase disclosure satisfy that High-current output；Compare output circuit and
Indicating circuit cooperating, can point out whether the output current after parallel connection meets output needs, when meeting output needs, N roads
The Parallel opertation of DC supply input is loaded on two inputs for comparing output circuit so that compare output circuit output energy
Enough excite indicating circuit to send the control signal of indication signal, so as to show that output current meets output current demand, otherwise compare
Output compared with output circuit can not excite indicating circuit to send indication signal, then illustrate that needs continue to be incorporated to DC supply input increasing
Big output current, until indicating circuit sends indication signal；The application propose dc source application circuit by output current compared with
Small DC supply input is integrated into the dc source of larger current output, and provides the finger whether electric current meets output demand
Show, be effectively utilized the small dc source of output current, for example, the power supply adaptor of mobile terminal charging, it is to avoid waste.
After the detailed description that the application embodiment is read in conjunction with the figure, other features and advantage of the application will become more
Plus it is clear.
Brief description of the drawings
Fig. 1 is the circuit frame figure for the dc source application circuit that the embodiment of the present application is proposed；
Fig. 2 is the circuit frame figure for the dc source application circuit that the embodiment of the present application is proposed；
Fig. 3 is the circuit diagram for the dc source application circuit that the embodiment of the present application is proposed；
Fig. 4 is the frame diagram for the dc source conversion equipment that the embodiment of the present application is proposed.
Embodiment
The embodiment to the application is described in more detail below in conjunction with the accompanying drawings.
As shown in figure 1, the dc source application circuit proposed for the embodiment of the present application, including N roads DC supply input electricity
Road IN1, IN2 ... INN, N road decision circuitry 11, M roads comparison circuit 12 and M roads indicating circuit 13；11 points of N roads decision circuitry
Not Lian Jie N roads DC supply input circuit, turn-on and turn-off are realized according to the input of dc source per road decision circuitry 11；N roads
The output end of decision circuitry 11 all connects the output end OUT of dc source application circuit；Compare the input of output circuit 12 per road
The output end of end all connection N roads decision circuitries 11；Difference between comparing output circuit 12 per road by being inputted end is with setting
Definite value is compared, and realizes the turn-on and turn-off for comparing output circuit per road；Compare all the way per one end connection of road indicating circuit 13
Output circuit 12, the output end of other end connection N roads decision circuitry 11, when the output end of N roads decision circuitry 11 is with being compared output
When the output end difference satisfaction of circuit 12 imposes a condition, the ON operation of indicating circuit 13；Wherein N, M are more than or equal to 1 just
Integer.
In the dc source application circuit proposed according to the embodiment of the present application, it can be inputted per road DC supply input circuit
Dc source is in decision circuitry 11 all the way all the way, for example, the direct current for the power supply adaptor output that low current all the way is exported
Source is input in decision circuitry all the way, when decision circuitry judges that the dc source of input meets minimum output voltage condition, output
The dc source of input；The dc source of output, which is loaded into, to be compared on output circuit, and instruction is excited by comparing output circuit output
Circuit sends the control signal of indication signal, so that indicating circuit indicates whether the electric current of the DC voltage of output meets defeated
Go out condition.
So that direct-current input power supplying circuit is that can export the power supply adaptor of 5V1A dc sources as an example, 5V2A is if desired exported
Dc source, then only when output dc source electric current be 2A when, compare output circuit can export excite instruction electricity
Road sends the control signal of indication signal so that indicating circuit sends the indication signal that output current meets output demand.
When on N roads, the input of DC supply input circuit all meets minimum output voltage condition, N roads DC supply input warp
Exported after the judgement of N roads decision circuitry, because the output end of N roads decision circuitry all connects the output end of dc source application circuit
OUT, then N roads decision circuitry connect upper parallel connectivity in circuit, then based on parallel connection the characteristics of, it is in parallel after dc source
It is output as the Parallel opertation of N roads DC supply input, namely the electric current summation that output current is N roads DC supply input so that
The electric current increase of dc source output, the output current of increase disclosure satisfy that the demand of High-current output；Compare output circuit and
Indicating circuit cooperating, can point out whether the output current after parallel connection meets output demand, when meeting output demand, N roads
The Parallel opertation of DC supply input is loaded on two inputs for comparing output circuit so that compare the output of output circuit
It can excite and refer to that circuit sends the control signal of indication signal, so that show that output current meets the demand of output current, it is no
Then comparing the output of output circuit can not excite indicating circuit to send indication signal, then illustrates that needs continue to be incorporated to dc source defeated
Enter and increase output current, indicate that indicating circuit sends indication signal.
It is whole by the less DC supply input of output current in the dc source application circuit that the embodiment of the present application is proposed
The dc source of larger direct current output is combined into, and provides the instruction whether output current meets output demand, is effectively utilized defeated
Go out the small dc source of electric current, for example, the power supply adaptor of mobile terminal charging, it is to avoid waste.
As shown in Fig. 2 a concrete application embodiment of the dc source application circuit proposed for the embodiment of the present application；Often
Road decision circuitry 11 include first switch pipe Q1N, second switch pipe Q2N, the first divider resistance R1N, the second divider resistance R2N,
Dropping resistor R5N and diode D1N；First divider resistance R1N first end, dropping resistor R5N first end and first switch
Pipe Q1N the second input connection is with DC supply input circuit INx all the way, and x is between 1 and N；First divider resistance R1N
The second end connect the second divider resistance R2N first end, the second divider resistance R2N the second end ground connection；Dropping resistor R5N's
Second end and first switch pipe Q1N first input end all connect second switch pipe Q2N the second input, second switch pipe
Q2N first input end connects the first divider resistance R1N the second end, second switch pipe Q2N output head grounding；First switch
Pipe Q1N output end connection diode D1N positive pole, diode D1N negative pole connection dc source output OUT.
Comparing output circuit per road includes switch key SW, the 3rd divider resistance R3, the 4th divider resistance R4, the 3rd switch
Pipe Q3 and comparator U；The output end of switch key SW first end connection N roads decision circuitry, namely dc source application circuit
Output end OUT, switch key SW the second end connects the 3rd divider resistance R3 first end and comparator U the first input
End, the 3rd divider resistance R3 the second end connects the 4th divider resistance R4 first end and comparator U the second input, the 4th
Divider resistance R4 the second end ground connection；Comparator U output end connects the 3rd switching tube Q3 first input end, the 3rd switching tube
Q3 the second input connects indicating circuit 13, the 3rd switching tube Q3 output head grounding all the way.
Include a light emitting diode D2 per road indicating circuit, wherein light emitting diode D2 positive pole connection N roads judge electricity
The input on road, negative pole connects the 3rd switching tube Q3 output end；Make when the comparator U for comparing output circuit exports high level signal
Obtain after the 3rd switching tube Q3 conductings, indicating circuit is connected to become path so that light emitting diode D2 is luminous；Namely send instruction letter
Number, indicate that output meets current needs.
Indicating circuit is used to indicate whether output current meets demand, and therefore, the embodiment of the present application does not limit indicating circuit
The mode of indication signal is sent, for example, includes buzzer, when indicating circuit is turned on, buzzer warning per road indicating circuit；Or
Include display screen per road indicating circuit, when indicating circuit is turned on, display screen work etc..
In the embodiment of the present application, N roads DC supply input circuit IN1, IN2 ... INN takes N values according to actual needs,
By taking the output dc source of DC power source adapter as an example, the mobile terminal maximum demand 2A if desired charged input current enters
Row charging, then need dc source to export the dc source that OUT exports 2A, if DC power source adapter can only export 1A direct current
Power supply, then N values take 2, namely need the DC supply input of two-way power supply adaptor.
So that N takes 2, DC supply input to be output as 5V2A for 5V1A and dc source as an example, then the embodiment of the present application is carried
The dc source application circuit gone out includes 2 tunnel DC supply input circuits and 2 tunnel decision circuitries；Wherein, first via decision circuitry
In, the first divider resistance R11 and the second divider resistance R21 value need whether the dc source for judging input meets minimum defeated
Enter voltage conditions, if the dc source of input needs to meet minimum 5V1A condition, the first divider resistance and the second partial pressure electricity
The value of resistance needs to meet：The voltage of V1 nodes after DC supply input circuit IN1 input voltage partial pressure is met second
Switching tube Q21 conducting voltage；Resistance R51 is to ensure, when the voltage of input can not make it that Q21 is turned on, it is ensured that Q11 has
Effect shut-off；And when input voltage make it that Q21 is turned on, input voltage passes through R51, then by Q21 ground connection, it is ensured that Q11 has
Effect conducting；So to cause R51 to try one's best greatly, more than 100K ohm, the when input voltage for reducing Q21 conductings passes through the resistance to ground
Loss.Similarly, in No. second input circuit the first divider resistance R12 and the second divider resistance R22 value needs to meet：
The voltage of V1 nodes after DC supply input IN2 input voltage partial pressure is met to second switch pipe Q22 conducting voltage；And
Resistance R52 action principle is identical with R51.
In two decision circuitries, after the conducting of second switch pipe so that resistance（R51/R52）The second end ground connection, then cause
Second input terminal voltage of first switch pipe is higher than first input end voltage, then first switch pipe is turned on so that direct current input electricity
Source IN1 and IN2 are input to dc source output OUT；It is achieved in the effect of two-way DC supply input Parallel opertation,
That is, output 5V2A dc source output after two 5V1A DC supply input is in parallel.
Comparing output circuit and indicating circuit is used to indicate whether the electric current for exporting dc source meets demand to user；
Comparator U first input end connects the 3rd divider resistance R3 first end, and comparator U the second input connects the 3rd partial pressure
Resistance R3 and the 4th divider resistance R4 connection ends, namely comparator U first input end is with the input pressure difference of the second input
With the pressure difference after partial pressure before 3rd divider resistance R3 and the 4th divider resistance R4 partial pressures；After switch key SW is pressed, N roads judge
The output of circuit, which is carried in compare in output circuit, causes the 3rd divider resistance R3 and the 4th divider resistance R4 to carry out partial pressure, partial pressure
Voltage it is required that the voltage difference of input comparator U first input end and the second input to meet comparator U outputs high
Level；After comparator U output high level, the 3rd switching tube Q3 conductings so that light emitting diode D2 is lighted because there is loop,
It is indicated above the demand that dc source output meets 5V2A；If dc source exports the current needs for being unsatisfactory for 2A, the 3rd point
Piezoresistance R3 and the 4th divider resistance R4 branch pressure voltage can not meet comparison circuit U output high level, then the 3rd switching tube Q3
It can not turn on, therefore light emitting diode D2 is not present loop and can not lighted, then demonstrates the need for increasing N values, such as N needs to take 3,
Thus come realize the demand of satisfaction Current Voltage export.
It is respectively used to indicate the DC supply input of different current values per road indicating circuit, such as when M takes 3, indicates respectively
2A dc source output, 2.5A dc source output and 3A dc source output, user can be according to actual needs
The key switch of the different indicating circuits of selection pressing, to check whether output meets the demand of itself, if it is not satisfied, then can be with
Increase DC supply input to increase dc source output current, until the power indicating circuit of correspondence output current value is luminous
Diode is lit.
As shown in figure 1, also include current-limiting resistance R6 in indicating circuit, current-limiting resistance R6 first end connection direct current
The output end OUT of source application circuit, its second end connecting luminous diode D2 positive pole.Current-limiting resistance R6 prevents electric current excessive,
Light emitting diode D2 is protected not to be burned.
At switch key SW the second end, comparator U feeder ear U-P is also connected with, the purpose so set is, it is ensured that
Just comparator U is powered only when switch key SW is pressed, so that comparator U is not pressing switch key
When SW, in off position, therefore in the absence of any loss.
Second switch pipe Q2N and the 3rd switching tube Q3 can be NPN triode；Then, now, second switch pipe Q2N and
Three switching tube Q3 first input end is the base stage of NPN triode, second switch pipe Q2N and the 3rd switching tube Q3 the second input
Hold the colelctor electrode for NPN triode, second switch pipe Q2N and the 3rd switching tube Q3 output end are the emitter stage of NPN triode.
3rd switching tube Q3 can also be NMOS FETs；Then, now, the 3rd switching tube Q3 first input end is
The grid of NMOS FETs, the 3rd switching tube Q3 the second input is the drain electrode of NMOS FETs, the 3rd switching tube Q3
Output end be NMOS FETs source electrode.
The preferred PMOS FETs of first switch pipe Q1N；Then, now, first switch pipe Q1N first input end is PMOS
The grid of FET, first switch pipe Q1N the second input is the source electrode of PMOS FETs, first switch pipe Q1N's
Output end is the drain electrode of PMOS FETs.First switch pipe Q1N can also be PNP triode, the first of first switch pipe Q1N
Input is the base stage of PNP triode, and first switch Q1N the second input is the emitter stage of PNP triode, first switch pipe
Q1N output end is the colelctor electrode of PNP triode.
Below using first switch pipe Q1N as PMOS FETs, second switch pipe Q2N and the 3rd switching tube Q3 are NPN tri-
Exemplified by pole pipe, as shown in figure 3, describing the dc source application of the embodiment of the present application proposition in detail with a specific embodiment circuit
Circuit.
In Fig. 3,3 tunnel DC supply input circuit IN1, IN2 and IN3 are set, three tunnel decision circuitries, three tunnels compare output electricity
Road and No. 3 indicating circuits；Wherein first via indicating circuit indicates 2A dc source output, and No. second indicating circuit indicates 2.5A
Dc source output, No. threeth indicating circuit indicates 3A dc source output.With the straight of every road DC supply input circuit
Stream power supply is 5V1A, be actually needed output dc source be 5V3A exemplified by, if only connection first via DC supply input circuit IN1
With the second tunnel DC supply input circuit IN2, then after divider resistance R11 and the R21 partial pressure of first via decision circuitry, triode
Q21 is turned on so that FET Q11 source voltage is turned on higher than grid voltage, exports 5V1A dc source to direct current
After the output end OUT of power supply application circuit, divider resistance R12 and the R22 partial pressure of the second tunnel decision circuitry, triode Q22 conductings,
So that FET Q12 source voltage is turned on higher than grid voltage, 5V1A dc source is exported to dc source application
The output end OUT of circuit, then the output end OUT outputs 5V2A of dc source application dc source.
The setting of each divider resistance for comparing output circuit according to output current, it is necessary to set, if it is desired to output current
For 2A, then the setting of divider resistance it is required that the pressure difference of the voltage before voltage and partial pressure after partial pressure to meet comparator output high
The requirement of level, if for example, when comparator requires that the voltage of in-phase input end is higher than the voltage at least 100mv of backward end, comparing
Device exports high level signal, and now, if dc source output is only 1A, 1A electric current causes after divider resistance partial pressure
Voltage before voltage, with partial pressure, the two pressure difference cannot meet the requirement that comparator exports high level, then comparator can only export low
Level, then light emitting diode in the absence of loop due to that can not light.
Now, the switch key SW3 of the 3rd road out-put supply indicating circuit is selected, 5V2A voltage x current is through divider resistance
After R33 and R43 partial pressures, in comparator U3 in-phase input end input DC power output voltage, in inverting input input point
Voltage after pressure, but divider resistance R33 and R43 resistance setting are, when meeting 5V3A situation, to produce branch pressure voltage and meet
Comparator U3 exports the condition of high level, and when being output as 5V2A, the voltage difference before voltage and partial pressure after partial pressure can not expire
Sufficient comparator U3 exports the condition of high level, then comparator U3 exports low level, and light emitting diode D23 can not in the absence of loop
Light, then explanation needs to increase DC supply input.
Now, connection three-way direct current power supply input circuit IN3 can be increased so that the output end of dc source application circuit
OUT output current increase, in pressing switch key SW3 makes that light emitting diode D23 can be lighted, and illustrating that output current meets needs
Seek size.
Similarly, it is necessary to when 2.5A is exported, press the switch key SW2 in the second road out-put supply indicating circuit to observe hair
Whether optical diode D22 lights, and lights according to light emitting diode D22 or do not light to decide whether to also need to increase direct current
Power input.
In above-described embodiment, each divider resistance compared in output circuit needs to use powerful resistance, according to reality
Electric current and allow the voltage integrated of input to consider the resistance of selection resistance that border needs, it is small that resistance is also tried one's best, as long as can
Meet the light emitting diode when switch key is pressed and can be lit and illustrate that dc source output can meet demand.
The dc source application circuit proposed based on above-mentioned the embodiment of the present application, as shown in figure 4, the embodiment of the present application is also carried
Go out a kind of dc source conversion equipment, including PN, M power output terminal Q1 of N number of power input terminal P1, P2 ...,
Q2 ..., QM and above-mentioned dc source application circuit；The N roads of N number of power input terminal connection dc source application circuit are straight
Flow power supply input circuit, output end OUT M power output terminal of connection of dc source application circuit.
Exemplified by maximum charging current for 2A mobile terminal charging, the dc source proposed using the embodiment of the present application
Conversion equipment, such as one USB-hub, corresponding power input terminal and power output terminal are USB interface, can be by two
The power supply adaptor for being output as the output of 1A low current is connected on two power input terminals, then is exported by power output terminal
2A dc source exports for giving mobile terminal charging, and whether meets electric current need by press of key switch inquiry output
Ask, if only connecting a power supply adaptor, light emitting diode does not light, and points out user to reconnect a power supply adaptor.By
This, be effectively utilized the small power supply adaptor of output current, it is to avoid wastes.
Dc source application circuit and dc source conversion equipment that above-mentioned the embodiment of the present application is proposed, by multichannel low current
The dc source of output carries out Parallel opertation, increases output current, and be provided with out-put supply indicating circuit to judge output
Whether electric current meets demand, in the case where increasing to the D.C. power requirement of High-current output, is effectively utilized the small electricity of output
The dc source of stream, it is to avoid waste.
It should be noted that described above is not limitation of the present invention, the present invention is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the present invention, also should
Belong to protection scope of the present invention.
Claims (9)
1. a kind of dc source application circuit, including N roads DC supply input circuit, it is characterised in that also judge electricity including N roads
Output circuit, M roads indicating circuit are compared in road, M roads；
N roads decision circuitry connects N roads DC supply input circuit respectively, per road decision circuitry according to dc source
Turn-on and turn-off are realized in input；The output end of N roads decision circuitry all connects the output end of the dc source application circuit；
The input for comparing output circuit per road all connects the output end of N roads decision circuitry；Compare output circuit per road to lead to
Cross the difference being inputted between end to be compared with setting value, realize the turn-on and turn-off for comparing output circuit per road；
Per road indicating circuit one end, output circuit is compared in connection all the way, and the other end connects the output end of N roads decision circuitry, when
When the output end of N roads decision circuitry imposes a condition with being compared the output end difference satisfaction of output circuit, indicating circuit conducting
Work；Wherein described N, M are the positive integer more than or equal to 1;
Include first switch pipe, second switch pipe, the first divider resistance, the second divider resistance, dropping resistor per road decision circuitry
And diode；The second of the first end of first divider resistance, the first end of the dropping resistor and the first switch pipe
Input connection is with DC supply input circuit all the way；Second end of first divider resistance connects second divider resistance
First end, second divider resistance the second end ground connection；Second end of the dropping resistor and the first switch pipe
First input end all connects the second input of the second switch pipe, and the first input end connection of the second switch pipe is described
Second end of the first divider resistance, the output head grounding of the second switch pipe；The output end connection institute of the first switch pipe
The positive pole of diode is stated, the negative pole of the diode connects the output end of the dc source application circuit.
2. dc source application circuit according to claim 1, it is characterised in that comparing output circuit per road includes switch
Button, the 3rd divider resistance, the 4th divider resistance, the 3rd switching tube and comparator；The first end connection institute of the switch key
State the output end of N roads decision circuitry, the second end of the switch key connects the first end of the 3rd divider resistance and described
The first input end of comparator, the second end of the 3rd divider resistance connects the first end of the 4th divider resistance and described
Second input of comparator, the second end ground connection of the 4th divider resistance；The output end connection the 3rd of the comparator is opened
The first input end of pipe is closed, the second input of the 3rd switching tube connects indicating circuit all the way, the 3rd switching tube
Output head grounding.
3. dc source application circuit according to claim 2, it is characterised in that include light-emitting diodes per road indicating circuit
Pipe, when indicating circuit is turned on, the lumination of light emitting diode；Or include buzzer per road indicating circuit, when indicating circuit is led
When logical, the buzzer warning；Or include display screen per road indicating circuit, and when indicating circuit is turned on, the display screen work.
4. dc source application circuit according to claim 2, it is characterised in that the switch key is four contact switch
Button, two inputs of comparator described in the first contact portion of the four contact switch button, four contact switch is pressed
Second contact portion comparator power supply of key, described in the 3rd contact of the four contact switch button and the 4th contact portion
The output end of N roads decision circuitry.
5. dc source application circuit according to claim 2, it is characterised in that the second switch pipe and the described 3rd
Switching tube is NPN triode；The first input end of the second switch pipe and the 3rd switching tube is the base of NPN triode
Second input of pole, the second switch pipe and the 3rd switching tube is the colelctor electrode of NPN triode, the second switch
The output end of pipe and the 3rd switching tube is the emitter stage of NPN triode.
6. dc source application circuit according to claim 2, it is characterised in that the 3rd switching tube is NMOS effects
Ying Guan；The first input end of 3rd switching tube is the grid of NMOS FETs, the second input of the 3rd switching tube
Hold as the drain electrode of NMOS FETs, the output end of the 3rd switching tube is the source electrode of NMOS FETs.
7. dc source application circuit according to claim 1, it is characterised in that the first switch pipe is PMOS effects
Ying Guan；The first input end of the first switch pipe is the grid of PMOS FETs, the second input of the first switch pipe
Hold as the source electrode of PMOS FETs, the output end of the first switch pipe is the drain electrode of PMOS FETs.
8. dc source application circuit according to claim 1, it is characterised in that the first switch pipe is the poles of PNP tri-
Pipe；The first input end of the first switch pipe is the base stage of PNP triode, and the second input of the first switch is PNP
The emitter stage of triode, the output end of the first switch pipe is the colelctor electrode of PNP triode.
9. dc source conversion equipment, it is characterised in that including N number of power input terminal, M power output terminal and the power
Profit requires the dc source application circuit described in any one of 1-8；N number of power input terminal connects the dc source application
The N roads DC supply input circuit of circuit, the output end of the dc source application circuit connects the M power output end
Son, wherein, M, N are the integer more than or equal to 1.
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| CN201510219857.7A CN104821722B (en) | 2015-05-04 | 2015-05-04 | A kind of dc source application circuit and dc source conversion equipment |
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| CN201510219857.7A CN104821722B (en) | 2015-05-04 | 2015-05-04 | A kind of dc source application circuit and dc source conversion equipment |
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| CN104821722B true CN104821722B (en) | 2017-09-22 |
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| CN105446918B (en) * | 2015-12-02 | 2018-01-09 | 青岛海信移动通信技术股份有限公司 | A kind of USB HUB power circuit and USB HUB |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201781310U (en) * | 2010-04-29 | 2011-03-30 | 比亚迪股份有限公司 | Battery charge control circuit |
| CN102222955A (en) * | 2011-06-17 | 2011-10-19 | 中达电通股份有限公司 | Control circuit and method for protecting storage battery pack |
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| US5025204A (en) * | 1990-01-05 | 1991-06-18 | Hewlett-Packard Company | Current mirror using resistor ratios in CMOS process |
| CN102340152A (en) * | 2010-07-15 | 2012-02-01 | 中兴电工机械股份有限公司 | System for connecting multiple groups of fuel battery converters in parallel and control method thereof |
| CN203722283U (en) * | 2013-12-27 | 2014-07-16 | 中兴通讯股份有限公司 | Charging cable and charging system |
| CN204741413U (en) * | 2015-05-04 | 2015-11-04 | 青岛歌尔声学科技有限公司 | DC power supply application circuit and DC power supply conversion equipment |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201781310U (en) * | 2010-04-29 | 2011-03-30 | 比亚迪股份有限公司 | Battery charge control circuit |
| CN102222955A (en) * | 2011-06-17 | 2011-10-19 | 中达电通股份有限公司 | Control circuit and method for protecting storage battery pack |
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