CN106325343B - Has the power supply device of electric wire voltage-drop compensation - Google Patents
Has the power supply device of electric wire voltage-drop compensation Download PDFInfo
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- CN106325343B CN106325343B CN201510340472.6A CN201510340472A CN106325343B CN 106325343 B CN106325343 B CN 106325343B CN 201510340472 A CN201510340472 A CN 201510340472A CN 106325343 B CN106325343 B CN 106325343B
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Abstract
The present invention provides a kind of power supply device for having electric wire voltage-drop compensation.Power supply device includes the first power pin, second source pin, direct current output voltage-stablizer, current sensing circuit and compensation circuit.First power pin is couple to external loading by the first wire and the second wire respectively with second source pin.Direct current output voltage-stablizer receives input voltage and feedback voltage, and produces output voltage and output current according to this.Current sensing circuit produces sensing voltage according to this to sense output current.Compensation circuit reacts on sensing voltage to produce offset voltage, and wherein offset voltage is the voltage drop of the first wire and the voltage drop sum of the second wire.Compensation circuit according to offset voltage to be compensated to output voltage so that the load voltage of external loading maintains stable voltage.
Description
Technical field
The invention relates to a kind of power supply device, and in particular to a kind of power supply for having electric wire voltage-drop compensation
Feeding mechanism.
Background technology
In general, power supply device can be couple to mostly by power transmission line (cable) load (such as mobile phone,
The electronic installations such as tablet personal computer, notebook computer or portable power source), to be powered to load (or charging).However, power supply passes
Defeated line generally has impedance in itself.When load increase make it that power transmission line is in itself when becoming big by the electric current of power transmission line
Impedance on the joint of circuit or power transmission line will produce obvious voltage drop.There is provided by power supply device
Output voltage is usually definite value, therefore, electric current is will be with to be sent to the load voltage of load end by power transmission line
Increase and decline.Consequently, it is possible to can may influence whether the electronic installation of load end normally operate (or charging).Especially
It is, once caused voltage drop is excessive on power transmission line so that and the load voltage values received by load end are down to electronics
When below the permissible minimum value of device, or even the electronic installation of load end can be made to decommission.
Therefore, in general application, it will usually be connected to load using extra detection wire (sensing wire)
End, to detect the load voltage of load end.However, this extra detection wire may reduce the Reliability of power transmission line
And the cost of power transmission line can be increased.Therefore, on the premise of extra detection wire is not used, how power delivery is reduced
The influence of voltage drop on line to the voltage of load end, is that this area is faced to improve the stability of the voltage of load end
One of important topic.
The content of the invention
In view of this, one exemplary embodiment of the invention provides a kind of power supply device for having electric wire voltage-drop compensation, borrows
An offset voltage is produced to detect the output current of power supply device, and according to this offset voltage come to power supply device
Output voltage compensate, to improve the stability of the voltage of load end.
The power supply device of the tool electric wire voltage-drop compensation of the one exemplary embodiment of the present invention can be used to supply power to outside
Load.This power supply device may include the first power pin, second source pin, direct current output voltage-stablizer, current sense electricity
Road and compensation circuit.First power pin can be used to be couple to the first power supply contact of external loading by the first wire.The
Two power pins can be used to be couple to the second source contact of external loading by the second wire.Direct current output voltage-stablizer can be used to
Input voltage and feedback voltage are received, and produces output voltage and output current according to this.Current sensing circuit can be coupled in direct current
To sense output current between the output voltage terminal of output voltage stabilizer and the first power pin, or it is coupled in direct current output voltage stabilizing
To sense output current between the reference voltage end and second source pin of device, and sensing voltage is produced according to this.Compensation circuit can
Current sensing circuit is couple to receive sensing voltage.Compensation circuit can be coupled in the first power pin and second source pin it
Between or be coupled between the output voltage terminal of direct current output voltage-stablizer and the reference voltage end of direct current output voltage-stablizer with produce
Feedback voltage.Compensation circuit can react on sensing voltage to produce offset voltage, and using the offset voltage to output voltage
Compensate.Offset voltage can be voltage drop sum of the voltage drop with the second wire of the first wire.
In one embodiment of this invention, above-mentioned current sensing circuit can be coupled in the output electricity of direct current output voltage-stablizer
Between pressure side and the first power pin.The reference voltage end of direct current output voltage-stablizer can be couple to second source pin.Electric current sense
Slowdown monitoring circuit may include detection resistance and subtracter.Detection resistance can be coupled in the output voltage terminal and of direct current output voltage-stablizer
To detect output current between one power pin.Subtracter can be couple to the both ends of detection resistance with the both ends to detection resistance
Voltage carries out subtraction, and produces sensing voltage according to this.
In one embodiment of this invention, above-mentioned subtracter may include operational amplifier, first resistor, second resistance,
3rd resistor and the 4th resistance.The output end of operational amplifier can be used to produce sensing voltage.First resistor can be coupled in directly
Flow between the output voltage terminal of output voltage stabilizer and the non-inverting input of operational amplifier.Second resistance can be coupled in computing and put
Between the non-inverting input and second source pin of big device.3rd resistor can be coupled in the first power pin and operational amplifier
Inverting input between.4th resistance can be coupled in operational amplifier inverting input and operational amplifier output end it
Between.
In one embodiment of this invention, above-mentioned compensation circuit can be coupled in the output voltage terminal of direct current output voltage-stablizer
Between the reference voltage end of direct current output voltage-stablizer.Compensation circuit may include voltage-to-current converter, compensation resistance and
Bleeder circuit.The input of voltage-to-current converter can be couple to current sensing circuit to receive sensing voltage, and produce according to this
Raw setting electric current.Compensation resistance can be coupled in the output of the output voltage terminal and voltage-to-current converter of direct current output voltage-stablizer
Between end.Compensation resistance can be used to react on setting electric current and produce offset voltage.Bleeder circuit can be coupled in voltage to electric current
Between the output end of converter and the reference voltage end of direct current output voltage-stablizer, feedback is produced to react on the offset voltage
Voltage.
In one embodiment of this invention, above-mentioned voltage-to-current converter may include voltage follower (Voltage
Follower) and setting resistance.The first input end of voltage follower can be used to receive sensing voltage to be used as setting voltage.
The output end of voltage follower can be couple to the output end of voltage-to-current converter.Setting resistance can be coupled in voltage follower
The second input and direct current output voltage-stablizer reference voltage end between.Setting resistance can be used to react on setting voltage to produce
Raw setting electric current.
In one embodiment of this invention, above-mentioned voltage follower may include operational amplifier and transistor.Computing
The non-inverting input of amplifier can be couple to the first input end of voltage follower.The inverting input of operational amplifier can coupling
It is connected to the second input of voltage follower.The control terminal of transistor can be couple to the output end of operational amplifier.Transistor
First end can be couple to the output end of voltage follower.Second end of transistor can be couple to the anti-phase input of operational amplifier
End.
In one embodiment of this invention, above-mentioned bleeder circuit may include first resistor and second resistance.First electricity
Resistance can be coupled between the output end of voltage-to-current converter and the feedback end of direct current output voltage-stablizer.Second resistance can couple
Between the feedback end of direct current output voltage-stablizer and the reference voltage end of direct current output voltage-stablizer.
In one embodiment of this invention, above-mentioned compensation circuit can be coupled in the first power pin and second source pin
Between.Compensation circuit may include voltage-to-current converter, compensation resistance and bleeder circuit.Voltage-to-current converter it is defeated
Current sensing circuit can be couple to receive sensing voltage by entering end, and produce setting electric current according to this.Compensation resistance can be coupled in the
Between one power pin and the output end of voltage-to-current converter.Compensation resistance can be used to react on setting electric current and produce benefit
Repay voltage.Bleeder circuit can be coupled between the output end of voltage-to-current converter and second source pin, to react on
The offset voltage and produce feedback voltage.
In one embodiment of this invention, above-mentioned voltage-to-current converter may include voltage follower and setting electricity
Resistance.The first input end of voltage follower can be used to receive sensing voltage to be used as setting voltage.The output end of voltage follower
The output end of voltage-to-current converter can be couple to.Setting resistance can be coupled in the second input and second of voltage follower
Between power pin.Setting resistance can be used to react on setting voltage to produce setting electric current.
In one embodiment of this invention, above-mentioned voltage follower may include operational amplifier and transistor.Computing
The non-inverting input of amplifier can be couple to the first input end of voltage follower.The inverting input of operational amplifier can coupling
It is connected to the second input of voltage follower.The control terminal of transistor can be couple to the output end of operational amplifier.Transistor
First end can be couple to the output end of voltage follower.Second end of transistor can be couple to the anti-phase input of operational amplifier
End.
In one embodiment of this invention, above-mentioned bleeder circuit may include first resistor and second resistance.First electricity
Resistance can be coupled between the output end of voltage-to-current converter and the feedback end of direct current output voltage-stablizer.Second resistance can couple
Between the feedback end and second source pin of direct current output voltage-stablizer.
In one embodiment of this invention, above-mentioned current sensing circuit can be coupled in the reference electricity of direct current output voltage-stablizer
Between pressure side and second source pin.The output voltage terminal of direct current output voltage-stablizer can be couple to the first power pin.Electric current sense
Slowdown monitoring circuit may include detection resistance and subtracter.Detection resistance can be coupled in the reference voltage end of direct current output voltage-stablizer and the
To detect output current between two power pins.Subtracter can be couple to the both ends of detection resistance with the both ends to detection resistance
Voltage carries out subtraction, and produces sensing voltage according to this.
In one embodiment of this invention, above-mentioned subtracter may include operational amplifier, first resistor, second resistance,
3rd resistor and the 4th resistance.The output end of operational amplifier can be used to produce sensing voltage.First resistor can be coupled in
Between two power pins and the non-inverting input of operational amplifier.Second resistance can be coupled in the noninverting defeated of operational amplifier
Enter between end and the reference voltage end of direct current output voltage-stablizer.3rd resistor can be coupled in the reference voltage of direct current output voltage-stablizer
Between end and the inverting input of operational amplifier.4th resistance can be coupled in the inverting input of operational amplifier and computing is put
Between the output end of big device.
Based on above-mentioned, in the above embodiment of the present invention, power supply device can be detected by current sensor
Output current (namely being supplied to the load current of external loading).When the output current increases, the setting electric current in compensation circuit
Current value also increase in certain proportion so that the magnitude of voltage of offset voltage caused by compensation circuit is consequently increased.Such as
This one, even if output current changes voltage drop and the voltage drop of the second wire of the first wire are changed therewith, compensation is electric
Road can still produce correspondingly sized offset voltage to enter Mobile state compensation to output voltage, so that load voltage maintains stabilization
Magnitude of voltage.Therefore, when power supply device is in high capacity, the stability of load voltage still can be lifted effectively, and can be changed
Kind load end because momentary load sharply increases and caused by load voltage moment decline the problem of.In addition, the above-mentioned reality of the present invention
Load terminal voltage need not be detected using extra detection wire by applying the power supply device of example, therefore can increase power supply supply dress
The Reliability for the wire put and the cost and size for reducing wire.
For features described above of the invention and advantage can be become apparent, special embodiment below, and it is detailed to coordinate accompanying drawing to make
Carefully it is described as follows.
Brief description of the drawings
Following accompanying drawing is the part for specification of the present invention, shows the example embodiment of the present invention, accompanying drawing is with saying
The description of bright book illustrates the principle of the present invention together.
Fig. 1 is the schematic diagram of the power supply device 100 of the tool electric wire voltage-drop compensation shown in one embodiment of the invention；
Fig. 2 is the schematic diagram of the power supply device 200 of the tool electric wire voltage-drop compensation shown in another embodiment of the present invention；
Fig. 3 is the schematic diagram of the power supply device 300 of the tool electric wire voltage-drop compensation shown in further embodiment of this invention；
Fig. 4 is the schematic diagram of the power supply device 400 of the tool electric wire voltage-drop compensation shown in further embodiment of this invention.
Description of reference numerals：
100、200、300、400：Power supply device；
110：Direct current output voltage-stablizer；
120、120’：Current sensing circuit；
121、121’：Subtracter；
130、130’：Compensation circuit；
131：Voltage-to-current converter；
131_1：Voltage follower；
135：Bleeder circuit；
900：External loading；
CN1：First power supply contact；
CN2：Second source contact；
FB：Feedback end；
Ifb：Electric current；
Iout：Output current；
Iset：Setting electric current；
OP1、OP2：Operational amplifier；
OUT：Output voltage terminal；
P1：First power pin；
P2：Second source pin；
Q：Transistor；
R1、Ra：First resistor；
R2、Rb：Second resistance；
R3：Compensate resistance；
Rc：3rd resistor；
Rd：4th resistance；
Rdet：Detection resistance；
Rset：Set resistance；
RW1、RW2：Resistance；
Vcmp：Offset voltage；
Vd：Voltage difference；
Vdc、Vdc’：DC voltage；
Vfb：Feedback voltage；
Vin：Input voltage；
VL：Load voltage；
VO、VO’：Output voltage；
Vsen：Sense voltage；
Vset：Set voltage；
VSS：Reference voltage end；
VW1、VW2：Voltage drop；
W1：First wire；
W2：Second wire.
Embodiment
In order that present disclosure can easily be understood, below can actually evidence as the present invention especially exemplified by embodiment
With the example of implementation.In addition, in place of all possibility, element/component/step of identical label is used in drawings and the embodiments,
Represent same or like part.
Fig. 1 is refer to below, and Fig. 1 is the power supply device of the tool electric wire voltage-drop compensation shown in one embodiment of the invention
100 schematic diagram.As shown in figure 1, power supply device 100 can be powered to external loading 900.External loading 900 can example
The electronic installation such as mobile phone, tablet personal computer, notebook computer or portable power source in this way, but the present invention is not limited thereto.Power supply supplies
Device 100 is answered to may include the first power pin P1, second source pin P2, direct current output voltage-stablizer 110, current sensing circuit
120 and compensation circuit 130, but not limited to this.First power pin P1 and second source pin P2 can have different voltage
Polarity.
First power pin P1 can be used to be couple to the first power supply contact CN1 of external loading 900 by the first wire W1.
Second source pin P2 can be used to be couple to the second source contact CN2 of external loading 900 by the second wire W2.First power supply
Contact CN1 and second source contact CN2 can have different polarity of voltage.First wire W1 can have a resistance RW1, and second
Wire W2 can have a resistance RW2.Direct current output voltage-stablizer 110 can be used to receive an input voltage vin and a feedback voltage
Vfb, and DC voltage Vdc (i.e. output voltage VO) and output current Iout is produced according to this, wherein input voltage vin can be straight
Flow power supply or AC power.
When the output current Iout that power supply device 100 is exported passes through the first wire W1, external loading 900 and
Two wire W2 and when being back to power supply device 100, a voltage drop VW1 will be produced in the first wire W1, and in the second wire
W2 produces a voltage drop VW2, and wherein voltage drop VW1, VW2 numerical value is directly proportional to output current Iout.Therefore, external loading
Load voltage VL between 900 the first power supply contact CN1 and second source contact CN2 will be less than the first power pin P1 with
Output voltage VO between second source pin P2, and load voltage VL will be with output current Iout size of current and change
Become.
In order to allow load voltage VL all to keep stable in the case of any output current Iout current value, at this
In embodiment, the reference voltage end VSS of direct current output voltage-stablizer 110 can be directly coupled to second source pin P2.Current sense
Circuit 120 can be coupled between the output voltage terminal OUT of direct current output voltage-stablizer 110 and the first power pin P1 to sense output
Electric current Iout, and sensing voltage Vsen is produced according to this.And compensation circuit 130 can be couple to current sensing circuit 120 to receive sense
Survey voltage Vsen.In addition, compensation circuit 130 can be coupled in the output voltage terminal OUT and direct current of direct current output voltage-stablizer 110
To produce feedback voltage Vfb between the reference voltage end VSS of output voltage stabilizer 110.The output voltage of direct current output voltage-stablizer 110
End OUT and reference voltage end VSS can have different polarity of voltage.Particularly, compensation circuit 130 can react on sensing voltage
Vsen is to produce offset voltage Vcmp, to be carried out to the output voltage VO between the first power pin P1 and second source pin P2
Compensation, wherein offset voltage Vcmp are the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 sums.
In one embodiment of this invention, as shown in Fig. 2 current sensing circuit 120 may include detection resistance Rdet and
Subtracter 121, but not limited to this.Detection resistance Rdet can be coupled in the output voltage terminal OUT and of direct current output voltage-stablizer 110
To detect output current Iout between one power pin P1.Subtracter 121 can be couple to detection resistance Rdet both ends with to inspection
The voltage at measuring resistance Rdet both ends carries out subtraction (such as voltage difference Vd shown in Fig. 2), and produces sensing voltage according to this
Vsen。
Subtracter 121 may include operational amplifier OP1, first resistor Ra, second resistance Rb, 3rd resistor Rc and the 4th
Resistance Rd, but not limited to this.Operational amplifier OP1 output end senses voltage Vsen to produce.First resistor Ra is coupled in
Between the output voltage terminal OUT and operational amplifier OP1 of direct current output voltage-stablizer 110 non-inverting input.Second resistance Rb
It is coupled between operational amplifier OP1 non-inverting input and second source pin P2.3rd resistor Rc is coupled in the first electricity
Between source pin P1 and operational amplifier OP1 inverting input.4th resistance Rd is coupled in the anti-phase defeated of operational amplifier OP1
Enter between end and operational amplifier OP1 output end.
On the other hand, compensation circuit 130 may include voltage-to-current converter 131, compensation resistance R3 and bleeder circuit
135.The input of voltage-to-current converter 131 is couple to current sensing circuit 120 and senses voltage Vsen to receive, and according to this
Produce setting electric current Iset.Compensation resistance R3 is coupled in the output voltage terminal OUT and voltage to electric current of direct current output voltage-stablizer 110
Between the output end of converter 131.Compensation resistance R3 produces offset voltage Vcmp to react on setting electric current Iset.Partial pressure
Circuit 135 can be coupled in the output end of voltage-to-current converter 131 and the reference voltage end VSS of direct current output voltage-stablizer 110
Between to produce feedback voltage Vfb.
Voltage-to-current converter 131 may include voltage follower (Voltage follower) 131_1 and setting electricity
Hinder Rset, but not limited to this.Voltage follower 131_1 first input end can be used to receive sensing voltage Vsen to be used as setting
Voltage Vset.Voltage follower 131_1 output end can be couple to the output end of voltage-to-current converter 131.Set resistance
Rset can be coupled in voltage follower 131_1 the second input and direct current output voltage-stablizer 110 reference voltage end VSS it
Between, it can be used to react on setting voltage Vset to produce setting electric current Iset.
Voltage follower 131_1 may include that operational amplifier OP2 and transistor Q, wherein transistor Q can connect for two-carrier
Junction transistor (BJT) or metal-oxide half field effect transistor (MOSFET), but not limited to this.Operational amplifier OP2's is noninverting defeated
Enter the first input end that end is couple to voltage follower 131_1.Operational amplifier OP2 inverting input is couple to voltage with coupling
Device 131_1 the second input.Transistor Q control terminal is couple to operational amplifier OP2 output end.The first of transistor Q
End is couple to voltage follower 131_1 output end.Transistor Q the second end is couple to operational amplifier OP2 anti-phase input
End.
Bleeder circuit 135 may include first resistor R1 and second resistance R2.First resistor R1 is coupled in voltage to electric current
Between the output end of converter 131 and the feedback end FB of direct current output voltage-stablizer 110.It is steady that second resistance R2 is coupled in direct current output
Between the feedback end FB of depressor 110 and the reference voltage end VSS of direct current output voltage-stablizer 110.
Running below for the power supply device 100 shown in Fig. 1 illustrates.For convenience of explanation, following
Embodiment in, it is assumed that first resistor Ra's, second resistance Rb, 3rd resistor Rc and the 4th resistance Rd in subtracter 121
Resistance value is all identical, and the first resistor R1 and second resistance R2 of bleeder circuit 135 resistance value are greatly in setting resistance Rset
Resistance value, therefore the electric current Ifb for flowing into bleeder circuit 135 be can be neglected, but the present invention is not limited thereto.In this situation
Under, sensing voltage Vsen is by equal to the voltage difference Vd at detection resistance Rdet both ends caused by current sensing circuit 120.In addition,
Negative-feedback characteristic based on voltage follower 131_1, therefore set voltage Vset and be substantially equal to sense voltage Vsen.Therefore set
Electric current Iset can be as shown in formula (1), and setting voltage Vset can be as shown in formula (2), and offset voltage Vcmp can be as shown in formula (3).
Iset=Vset ÷ Rset formulas (1)
Vset=Vsen=Vd=Iout × Rdet formulas (2)
Vcmp=Iset × R3 formulas (3)
If formula (1) and formula (2) are substituted into formula (3), offset voltage Vcmp can be as shown in formula (4).
Vcmp=Iout × ((Rdet × R3) ÷ Rset) formula (4)
When external loading 900 does not consume power, namely when output current Iout is zero, the electricity at detection resistance Rdet both ends
Pressure difference Vd is zero so that sets voltage Vset as zero, therefore setting electric current Iset is zero.Now, compensating will not produce on resistance R3
Raw offset voltage Vcmp.In addition, the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 be all zero (because
Output current Iout is that zero), therefore, load voltage VL will be equal to output voltage VO, that is to say that direct current output voltage-stablizer 110 is produced
Raw DC voltage Vdc, as shown in formula (5).
VL=VO=Vdc=(1+ ((R1+R3) ÷ R2)) × Vfb formulas (5)
Relatively, when external loading 900 consumes power because coming into operation, namely output current Iout be more than zero when,
According to formula (4), the offset voltage Vcmp being not zero will be produced on compensation resistance R3.Now, direct current output voltage-stablizer 110 is through mending
DC voltage Vdc ' after repaying will as shown in formula (6), and the output voltage VO after compensating ' then as shown in formula (7).
Vdc '=(1+ ((R1+R3) ÷ R2)) × Vfb+Vcmp formulas (6)
VO '=Vdc '-Vd formulas (7)
In addition, the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 can respectively such as formula (8) and
Shown in formula (9).In order to which load voltage VL can keep stablizing, namely change regardless of output current Iout size of current,
Load voltage VL can be stable at ((1+ ((R1+R3) ÷ R2)) × Vfb) (load voltage VL when i.e. output current Iout is zero
Magnitude of voltage), therefore formula (10) can be set up.Formula (6), (7) are substituted into formula (10) and can obtain formula (11).By formula (4), (8), (9)
And voltage difference Vd=Iout × Rdet substitutes into formula (11) and can obtain formula (12).
VW1=Iout × RW1 formulas (8)
VW2=Iout × RW2 formulas (9)
VL=VO '-VW1-VW2=((1+ ((R1+R3) ÷ R2)) × Vfb) formula (10)
Vcmp-Vd=VW1+VW2 formulas (11)
((Rdet × R3) ÷ Rset)-Rdet=RW1+RW2 formulas (12)
As long as the it follows that resistance of the resistance RW2 by the first wire W1 of measurement resistance RW1 and the second wire W2
Value, and by adjusting detection resistance Rdet, compensation resistance R3 and setting resistance Rset resistance value with the bar of meeting formula (12)
Part, you can corresponding offset voltage Vcmp is produced to be compensated to output voltage VO, so that load voltage VL keeps steady
It is fixed.
For example, in the above-described embodiments, it is assumed that direct current output voltage-stablizer 110 can be used to produce 5 volts of direct current
Vdc is pressed, the first wire W1 resistance RW1 resistance value is 0.2 ohm (Ω), and the second wire W2 resistance RW2 resistance value
For 0.2 ohm.For meeting formula (12), detection resistance Rdet resistance value can be 0.01 ohm, setting resistance Rset resistance
Value can be 2.5 kilohms (K Ω), and the resistance value for compensating resistance R3 can be 102.5 kilohms, but not limited to this.
When external loading 900 does not consume power, namely output current Iout is 0 ampere-hour, detection resistance Rdet both ends
Voltage difference Vd be 0 volt, therefore setting electric current Iset be 0 ampere.Now, offset voltage will not be produced by compensating on resistance R3
Vcmp.In addition, the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 are 0 volt, therefore, load
Voltage VL is equal to output voltage VO, is also equal to DC voltage Vdc caused by direct current output voltage-stablizer 110 (being 5 volts).
On the other hand, when external loading 900 consumes power because coming into operation, it is assumed herein that output current Iout is 1
Ampere, then the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 are 0.2 volt, and detection resistance Rdet
Voltage difference Vd, the sensing voltage Vsen and setting voltage Vset at both ends are 0.01 volt.Consequently, it is possible to transistor Q will be led
Logical and setting electric current Iset is 0.004 milliampere.Now, compensating will be because setting electric current Iset be (for 0.004 milliampere on resistance R3
Training) flow through and produce offset voltage Vcmp as 0.41 volt.Now, the DC voltage Vdc of direct current output voltage-stablizer 110 is because of compensation
Voltage Vcmp is drawn high (or compensation) to 5.41 volts for 0.41 volt.Due to the voltage difference Vd at detection resistance Rdet both ends
For 0.01 volt, therefore the output voltage VO after compensating ' it is 5.4 volts.Output voltage VO after compensation ' led in deduction first
In the case of line W1 voltage drop VW1 and the second wire W2 voltage drop VW2 (all for 0.2 volt), load voltage VL is still 5 volts
It is special.
Herein it is noted that the usual very littles of voltage difference Vd at the both ends due to detection resistance Rdet, therefore formula (7) and formula
(11) the voltage difference Vd in is generally negligible.Therefore, offset voltage Vcmp substantially can be considered the first wire W1 voltage
VW1 and the second wire W2 voltage drop VW2 sums drop.
It follows that when the output current Iout detected by detection resistance Rdet (namely is supplied to external loading 900
Load current) increase when, setting electric current Iset current value also increase in certain proportion (according to formula (1), (2)) so that mend
The magnitude of voltage for repaying voltage Vcmp is consequently increased to be compensated to output voltage VO.Consequently, it is possible to the output electricity after compensating
Pressure VO ' can be such that load voltage VL is not influenceed (i.e. by the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2
Output current Iout influence) and maintain stable magnitude of voltage.
An one exemplary embodiment is different from, Fig. 2 is the electricity of the tool electric wire voltage-drop compensation shown in another embodiment of the present invention
The schematic diagram of source supply device 200.Please merge reference picture 1 and the power supply device 200 shown in Fig. 2, Fig. 2 equally includes first
Power pin P1, second source pin P2, direct current output voltage-stablizer 110, current sensing circuit 120 and compensation circuit 130 '.
The circuit framework of direct current output voltage-stablizer 110, current sensing circuit 120 and compensation circuit 130 ' shown in Fig. 2 is similar respectively
In the circuit framework of the direct current output voltage-stablizer 110 shown in Fig. 1, current sensing circuit 120 and compensation circuit 130, therefore can join
The related description for stating Fig. 1 is admitted to analogize, will not be repeated here.
Compared to the compensation circuit 130 shown in Fig. 1 be coupled to output voltage terminal OUT in direct current output voltage-stablizer 110 with
Between the reference voltage end VSS of direct current output voltage-stablizer 110, the compensation circuit 130 ' shown in Fig. 2 is coupled to connect in the first power supply
Between pin P1 and second source pin P2.In other words, offset voltage Vcmp caused by Fig. 1 compensation circuit 130 is direct
Compensation is caused by direct current output voltage-stablizer 110 on DC voltage Vdc, so as to be compensated indirectly to output voltage VO
(as shown in formula (7)).Relatively, offset voltage Vcmp caused by Fig. 2 compensation circuit 130 ' is then directly to output electricity
Pressure VO is compensated.
Running below for the power supply device 200 shown in Fig. 2 illustrates.For convenience of explanation, following
Embodiment in, it is also assumed that first resistor Ra, second resistance Rb, 3rd resistor Rc and the 4th resistance in subtracter 121
Rd resistance value is all identical, and the first resistor R1 and second resistance R2 of bleeder circuit 135 resistance value are greatly in setting resistance
Rset resistance value, therefore the electric current Ifb for flowing into bleeder circuit 135 can be neglected, but the present invention is not limited thereto.In this feelings
Under condition, sensing voltage Vsen is by equal to the voltage difference Vd at detection resistance Rdet both ends caused by current sensing circuit 120.Separately
Outside, the negative-feedback characteristic based on voltage follower 131_1, therefore set voltage Vset and be substantially equal to sense voltage Vsen.Therefore
Setting electric current Iset can be as shown in formula (1), and setting voltage Vset can be as shown in formula (2), and offset voltage Vcmp can be such as formula (3) institute
Show.
When external loading 900 does not consume power, namely when output current Iout is zero, the electricity at detection resistance Rdet both ends
Pressure difference Vd is zero so that sets voltage Vset as zero, therefore setting electric current Iset is zero.Now, compensating will not produce on resistance R3
Raw offset voltage Vcmp.In addition, the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 be all zero (because
Output current Iout is that zero), therefore, load voltage VL will be equal to output voltage VO, be also equal to direct current output voltage-stablizer 110 and be produced
Raw DC voltage Vdc, as shown in formula (5).In other words, now DC voltage Vdc caused by direct current output voltage-stablizer 110
It is output voltage VO and load voltage VL.
Relatively, when external loading 900 consumes power because coming into operation, namely output current Iout be more than zero when,
According to formula (4), the offset voltage Vcmp being not zero will be produced on compensation resistance R3.Now, the output voltage VO after compensating '
Then as shown in formula (13).
VO '=(1+ ((R1+R3) ÷ R2)) × Vfb+Vcmp formulas (13)
In addition, the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 can respectively such as formula (8) and
Shown in formula (9).In order to which load voltage VL can keep stablizing, namely change regardless of output current Iout size of current,
Load voltage VL can be stable at ((1+ ((R1+R3) ÷ R2)) × Vfb) (load voltage VL when i.e. output current Iout is zero
Magnitude of voltage), therefore formula (10) can be set up.Formula (13) is substituted into formula (10) and can obtain formula (14).Formula (4), (8), (9) are substituted into
Formula (14) can obtain formula (15).
Vcmp=VW1+VW2 formulas (14)
((Rdet × R3) ÷ Rset)=RW1+RW2 formulas (15)
As long as the it follows that resistance of the resistance RW2 by the first wire W1 of measurement resistance RW1 and the second wire W2
Value, and by adjusting detection resistance Rdet, compensation resistance R3 and setting resistance Rset resistance value with the bar of meeting formula (15)
Part, you can corresponding offset voltage Vcmp is produced to be compensated to output voltage VO, so that load voltage VL keeps steady
It is fixed.Herein it is noted that the usual very littles of voltage difference Vd at the both ends due to detection resistance Rdet, therefore the voltage in formula (7)
Poor Vd is generally negligible.Therefore the DC voltage Vdc ' after compensating substantially can be considered the output voltage VO after compensation '.
For example, in the above-described embodiments, it is assumed that direct current output voltage-stablizer 110 can be used to produce 5 volts of direct current
Vdc is pressed, the first wire W1 resistance RW1 resistance value is 0.2 ohm (Ω), and the second wire W2 resistance RW2 resistance value
For 0.2 ohm.For meeting formula (15), detection resistance Rdet resistance value can be 0.01 ohm, setting resistance Rset resistance
Value can be 2.5 kilohms (K Ω), and the resistance value for compensating resistance R3 can be 100 kilohms, but not limited to this.
When external loading 900 does not consume power, namely output current Iout is 0 ampere-hour, detection resistance Rdet both ends
Voltage difference Vd be 0 volt, therefore setting electric current Iset be 0 ampere.Now, offset voltage will not be produced by compensating on resistance R3
Vcmp.In addition, the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 are 0 volt, therefore, load
Voltage VL is equal to output voltage VO, that is to say DC voltage Vdc caused by direct current output voltage-stablizer 110 (for 5 volts).
On the other hand, when external loading 900 consumes power because coming into operation, it is assumed herein that output current Iout is 1
Ampere, then the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2 are 0.2 volt, and detection resistance Rdet
Voltage difference Vd, the sensing voltage Vsen and setting voltage Vset at both ends are 0.01 volt.Consequently, it is possible to transistor Q will be led
Logical and setting electric current Iset is 0.004 milliampere.Now, compensating will be because setting electric current Iset be (for 0.004 milliampere on resistance R3
Training) flow through and produce offset voltage Vcmp as 0.4 volt.Now, output voltage VO because offset voltage Vcmp be 0.4 volt and by
(or compensation) is drawn high to 5.4 volts.Output voltage VO after compensation ' deducting the first wire W1 voltage drop VW1 and second
In the case of wire W2 voltage drop VW2 (being all 0.2 volt), load voltage VL is still 5 volts.
It follows that when the output current Iout detected by detection resistance Rdet (namely is supplied to external loading 900
Load current) increase when, setting electric current Iset current value also increase in certain proportion (according to formula (1), (2)) so that mend
The magnitude of voltage for repaying voltage Vcmp is consequently increased to be compensated to output voltage VO.Consequently, it is possible to the output electricity after compensating
Pressure VO ' can be such that load voltage VL is not influenceed (i.e. by the first wire W1 voltage drop VW1 and the second wire W2 voltage drop VW2
Output current Iout influence) and maintain stable magnitude of voltage.
The embodiment shown in Fig. 1 is different from, Fig. 3 is the power supply of the tool electric wire voltage-drop compensation shown in further embodiment of this invention
The schematic diagram of feeding mechanism 300.Please merge reference picture 1 and the power supply device 300 shown in Fig. 3, Fig. 3 equally includes the first electricity
Source pin P1, second source pin P2, direct current output voltage-stablizer 110, current sensing circuit 120 ' and compensation circuit 130, and
Current sensing circuit 120 ' equally includes detection resistance Rdet and subtracter 121 '.Direct current output voltage-stablizer shown in Fig. 3
110th, the circuit framework of current sensing circuit 120 ', detection resistance Rdet, subtracter 121 ' and compensation circuit 130 is similar respectively
In the direct current output voltage-stablizer 110 shown in Fig. 1, current sensing circuit 120, detection resistance Rdet, subtracter 121 and compensation electricity
The circuit framework on road 130, therefore the related description for referring to above-mentioned Fig. 1 will not be repeated here with analogizing.
The difference of the power supply device 300 shown in power supply device 100 and Fig. 3 shown in Fig. 1 is only that：Fig. 1 institutes
The current sensing circuit 120 shown be coupled to the output voltage terminal OUT and the first power pin P1 of direct current output voltage-stablizer 110 it
Between to sense output current Iout and produce sensing voltage Vsen, and the reference voltage end VSS of direct current output voltage-stablizer 110 according to this
It is coupled to second source pin P2.And the current sensing circuit 120 ' shown in Fig. 3 is then coupled in direct current output voltage-stablizer 110
Reference voltage end VSS and second source pin P2 between with sense output current Iout and according to this produce sensing voltage Vsen,
And the output voltage terminal OUT of direct current output voltage-stablizer 110 is then coupled to the first power pin P1.However, the power supply shown in Fig. 3
The running of feeding mechanism 300 is similar to the running of the power supply device 100 shown in Fig. 1.Therefore, the power supply shown in Fig. 3
The running of feeding mechanism 300 refers to above-mentioned Fig. 1 related description to analogize, therefore will not be repeated here.
Fig. 4 is refer to below, and Fig. 4 is the power supply device of the tool electric wire voltage-drop compensation shown in further embodiment of this invention
400 schematic diagram.Please merge reference picture 2 and the power supply device 400 shown in Fig. 4, Fig. 4 equally includes the first power pin
P1, second source pin P2, direct current output voltage-stablizer 110, current sensing circuit 120 ' and compensation circuit 130 '.Shown in Fig. 4
Direct current output voltage-stablizer 110, the circuit framework of current sensing circuit 120 ' and compensation circuit 130 ' be analogous respectively to Fig. 2 institutes
The circuit framework of direct current output voltage-stablizer 110, current sensing circuit 120 and the compensation circuit 130 ' shown, therefore refer to above-mentioned
Fig. 1 related description will not be repeated here with analogizing.
The difference of the power supply device 400 shown in power supply device 200 and Fig. 4 shown in Fig. 2 is only that：Fig. 2 institutes
The current sensing circuit 120 shown be coupled to the output voltage terminal OUT and the first power pin P1 of direct current output voltage-stablizer 110 it
Between to sense output current Iout and produce sensing voltage Vsen, and the reference voltage end VSS of direct current output voltage-stablizer 110 according to this
It is coupled to second source pin P2.And the current sensing circuit 120 ' shown in Fig. 4 is then coupled in direct current output voltage-stablizer 110
Reference voltage end VSS and second source pin P2 between with sense output current Iout and according to this produce sensing voltage Vsen,
And the output voltage terminal OUT of direct current output voltage-stablizer 110 is then coupled to the first power pin P1.However, the power supply shown in Fig. 4
The running of feeding mechanism 400 is similar to the running of the power supply device 200 shown in Fig. 2.Therefore, the power supply shown in Fig. 4
The running of feeding mechanism 400 refers to above-mentioned Fig. 2 related description to analogize, therefore will not be repeated here.
In summary, in the above embodiment of the present invention, (namely can be carried by current sensor to detect output current
Supply the load current of external loading).When the output current increases, the current value of the setting electric current in compensation circuit is also with certain
Ratio increase so that the magnitude of voltage of offset voltage caused by compensation circuit is consequently increased.Consequently, it is possible to even if output electricity
Stream changes the voltage drop for causing the first wire and the voltage drop of the second wire changes therewith, and compensation circuit can still produce correspondingly sized
Offset voltage to be compensated to output voltage so that load voltage maintains stable magnitude of voltage.Therefore, can be effectively
Power supply device is lifted in high capacity, the stability of the load voltage of external loading, and load end can be improved because moment is born
The problem of load sharply increases and causes load voltage moment to decline.In addition, the power supply supply dress of the above embodiment of the present invention
Load terminal voltage need not be detected using extra detection wire by putting, therefore can increase the believable of the wire of power supply device
Spend and reduce the cost and size of wire.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (11)
- A kind of 1. power supply device for having electric wire voltage-drop compensation, to supply power to external loading, it is characterised in that the power supply Feeding mechanism includes：First power pin, to be couple to the first power supply contact of the external loading by the first wire；Second source pin, to be couple to the second source contact of the external loading by the second wire；Direct current output voltage-stablizer, to receive input voltage and feedback voltage, and output voltage and output current is produced according to this；Current sensing circuit, be coupled between the output voltage terminal of the direct current output voltage-stablizer and first power pin with Sense the output current, or be coupled in the reference voltage end of the direct current output voltage-stablizer and the second source pin it Between to sense the output current, and produce sensing voltage according to this；AndCompensation circuit, the current sensing circuit is couple to receive the sensing voltage, and be coupled in first power supply and connect Between pin and the second source pin or be coupled in the output voltage terminal of the direct current output voltage-stablizer with it is described straight Flow between the reference voltage end of output voltage stabilizer to produce the feedback voltage, wherein the compensation circuit react on it is described Sensing voltage is compensated to produce offset voltage, and using the offset voltage to the output voltage, wherein the benefit The voltage drop and the voltage drop sum of second wire that voltage is first wire are repaid,Wherein described compensation circuit includes：Voltage-to-current converter, the input of the voltage-to-current converter are couple to the current sensing circuit to receive The sensing voltage, and setting electric current is produced according to this；Resistance is compensated, is coupled in the output voltage terminal of the direct current output voltage-stablizer and the voltage-to-current converter Between output end, or it is coupled between first power pin and the output end of the voltage-to-current converter, to React on the setting electric current and produce the offset voltage；AndBleeder circuit, it is coupled in the described of the output end of the voltage-to-current converter and the direct current output voltage-stablizer Between reference voltage end, or be coupled in the output end of the voltage-to-current converter and the second source pin it Between, produce the feedback voltage to react on the offset voltage.
- 2. the power supply device of tool electric wire voltage-drop compensation according to claim 1, it is characterised in that the current sense Circuit is coupled between the output voltage terminal of the direct current output voltage-stablizer and first power pin, and the direct current The reference voltage end of output voltage stabilizer is couple to the second source pin, and the current sensing circuit includes：Detection resistance, it is coupled between the output voltage terminal of the direct current output voltage-stablizer and first power pin, To detect the output current；AndSubtracter, the both ends for being couple to the detection resistance carry out subtraction fortune with the voltage at the both ends to the detection resistance Calculate, and produce the sensing voltage according to this.
- 3. the power supply device of tool electric wire voltage-drop compensation according to claim 2, it is characterised in that the subtracter bag Include：Operational amplifier, the output end of the operational amplifier is producing the sensing voltage；First resistor, it is coupled in the noninverting of the output voltage terminal of the direct current output voltage-stablizer and the operational amplifier Between input；Second resistance, it is coupled between the non-inverting input of the operational amplifier and the second source pin；3rd resistor, it is coupled between first power pin and the inverting input of the operational amplifier；And4th resistance, be coupled in the inverting input of the operational amplifier and the operational amplifier output end it Between.
- 4. the power supply device of tool electric wire voltage-drop compensation according to claim 1, it is characterised in that the voltage to electricity Stream transformer includes：Voltage follower, the first input end of the voltage follower to receive the sensing voltage using as setting voltage, The output end of the voltage follower is couple to the output end of the voltage-to-current converter；AndResistance is set, is coupled in the second input of the voltage follower with the described of the direct current output voltage-stablizer with reference to electricity Between pressure side, to react on the setting voltage to produce the setting electric current.
- 5. the power supply device of tool electric wire voltage-drop compensation according to claim 4, it is characterised in that the voltage is with coupling Device includes：Operational amplifier, the non-inverting input of the operational amplifier are couple to first input of the voltage follower End, the inverting input of the operational amplifier are couple to second input of the voltage follower；AndTransistor, the control terminal of the transistor are couple to the output end of the operational amplifier, the first end of the transistor The output end of the voltage follower is couple to, the second end of the transistor is couple to the anti-phase of the operational amplifier Input.
- 6. the power supply device of tool electric wire voltage-drop compensation according to claim 1, it is characterised in that the bleeder circuit Including：First resistor, be coupled in the output end of the voltage-to-current converter with the direct current output voltage-stablizer one are anti- Between feedback end；AndSecond resistance, it is coupled in the feedback end of the direct current output voltage-stablizer and the ginseng of the direct current output voltage-stablizer Examine between voltage end.
- 7. the power supply device of tool electric wire voltage-drop compensation according to claim 1, it is characterised in that the voltage to electricity Stream transformer includes：Voltage follower, the first input end of the voltage follower to receive the sensing voltage using as setting voltage, The output end of the voltage follower is couple to the output end of the voltage-to-current converter；AndResistance is set, is coupled between the second input of the voltage follower and the second source pin, to react Voltage is set to produce the setting electric current in described.
- 8. the power supply device of tool electric wire voltage-drop compensation according to claim 7, it is characterised in that the voltage is with coupling Device includes：Operational amplifier, the non-inverting input of the operational amplifier are couple to first input of the voltage follower End, the inverting input of the operational amplifier are couple to second input of the voltage follower；AndTransistor, the control terminal of the transistor are couple to the output end of the operational amplifier, the first end of the transistor The output end of the voltage follower is couple to, the second end of the transistor is couple to the described of the operational amplifier Inverting input.
- 9. the power supply device of tool electric wire voltage-drop compensation according to claim 1, it is characterised in that the bleeder circuit Including：First resistor, it is coupled in the output end of the voltage-to-current converter and the feedback of the direct current output voltage-stablizer Between end；AndSecond resistance, it is coupled between the feedback end of the direct current output voltage-stablizer and the second source pin.
- 10. the power supply device of tool electric wire voltage-drop compensation according to claim 1, it is characterised in that the electric current sense Slowdown monitoring circuit is coupled between the reference voltage end of the direct current output voltage-stablizer and the second source pin, and described straight The output voltage terminal of stream output voltage stabilizer is couple to first power pin, and the current sensing circuit includes：Detection resistance, it is coupled between the reference voltage end of the direct current output voltage-stablizer and the second source pin, To detect the output current；AndSubtracter, the both ends for being couple to the detection resistance carry out subtraction fortune with the voltage at the both ends to the detection resistance Calculate, and produce the sensing voltage according to this.
- 11. the power supply device of tool electric wire voltage-drop compensation according to claim 10, it is characterised in that the subtracter Including：Operational amplifier, the output end of the operational amplifier is producing the sensing voltage；First resistor, it is coupled between the second source pin and the non-inverting input of the operational amplifier；Second resistance, it is coupled in the described of the non-inverting input of the operational amplifier and the direct current output voltage-stablizer Between reference voltage end；3rd resistor, it is coupled in the anti-phase defeated of the reference voltage end of the direct current output voltage-stablizer and the operational amplifier Enter between end；And4th resistance, be coupled in the inverting input of the operational amplifier and the operational amplifier output end it Between.
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| CN108808685B (en) * | 2018-03-26 | 2020-12-11 | 北京航天发射技术研究所 | Power supply voltage digital compensation system and method |
| CN108874021B (en) * | 2018-09-04 | 2020-07-24 | 广东小天才科技有限公司 | Dynamic compensation circuit for line voltage drop |
| CN109951075B (en) * | 2019-03-11 | 2020-11-10 | 深圳市核达中远通电源技术股份有限公司 | Load regulation control circuit of switching power supply and implementation method thereof |
| CN110762794B (en) * | 2019-10-31 | 2021-07-20 | 广东美的制冷设备有限公司 | Power supply voltage determining method and device, compressor and air conditioner |
| CN111813174A (en) * | 2020-07-20 | 2020-10-23 | 无锡英诺浦斯微电子有限公司 | Control device and regulation method for output voltage of synchronous rectification chip changing along with current |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201503559U (en) * | 2009-09-30 | 2010-06-09 | 东莞市大忠电子有限公司 | Voltage-drop compensation circuit for power adapter output lines |
| TW201106598A (en) * | 2009-08-13 | 2011-02-16 | Niko Semiconductor Co Ltd | Power control circuit with wire compensation and wire compensation method of the same |
| CN102067048A (en) * | 2008-06-17 | 2011-05-18 | 罗斯蒙德公司 | RF adapter for field device with variable voltage drop |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8754622B2 (en) * | 2009-10-30 | 2014-06-17 | Linear Technology Corporation | Voltage regulator compensating for voltage drop along conductors between regulator output and load |
| TWI429174B (en) * | 2010-09-15 | 2014-03-01 | Analog Vision Technology Inc | Active wire compensation circuit and controller with the same |
| KR20120048876A (en) * | 2010-11-08 | 2012-05-16 | 현대중공업 주식회사 | Welding power supply and welding voltage regulation method thereof |
| TWI451224B (en) * | 2011-12-21 | 2014-09-01 | Anpec Electronics Corp | Dynamic voltage adjustment device and power transmission system using the same |
-
2015
- 2015-06-18 CN CN201510340472.6A patent/CN106325343B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102067048A (en) * | 2008-06-17 | 2011-05-18 | 罗斯蒙德公司 | RF adapter for field device with variable voltage drop |
| TW201106598A (en) * | 2009-08-13 | 2011-02-16 | Niko Semiconductor Co Ltd | Power control circuit with wire compensation and wire compensation method of the same |
| CN201503559U (en) * | 2009-09-30 | 2010-06-09 | 东莞市大忠电子有限公司 | Voltage-drop compensation circuit for power adapter output lines |
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