CN107565799A - Power-supply device and its power feedback - Google Patents
Power-supply device and its power feedback Download PDFInfo
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- CN107565799A CN107565799A CN201710796568.2A CN201710796568A CN107565799A CN 107565799 A CN107565799 A CN 107565799A CN 201710796568 A CN201710796568 A CN 201710796568A CN 107565799 A CN107565799 A CN 107565799A
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Abstract
The invention discloses a kind of power-supply device and its power feedback, circuit includes：First voltage feedback end and second voltage feedback end, for the positive feedback pin and negative-feedback pin in the corresponding power supply wiring port for connecting power-supply device；First comparing unit, first the first comparison signal of reference voltage output of unit offer is provided for the voltage fed back according to second voltage feedback end and the first reference voltage, to control the on or off of second switch pipe；Second comparing unit, second the second comparison signal of reference voltage output of unit offer is provided for the voltage fed back according to first voltage feedback end and the second reference voltage, to control the on or off of first switch pipe；Differential amplification unit, for exporting feedback voltage to the voltage regulation unit of power-supply device according to the on off state of first switch pipe and second switch pipe, output voltage is adjusted according to feedback voltage for voltage regulation unit, so that the output voltage of power supply wiring port meets the requirement of load end equipment.
Description
Technical field
The present invention relates to power technique fields, the power feedback and a kind of power supply of more particularly to a kind of power-supply device are set
It is standby.
Background technology
In correlation technique, the design on power feedback mainly has two schemes：One is near-end feedback, i.e., directly
Feedback voltage signal is extracted from voltage supply device voltage output port, and feedback voltage signal is input to power module feedback
Network；Another is far-end feedback, i.e., from load equipment control source port lead, feedback voltage signal is set by voltage supply
Standby voltage output port access power supply feedback network.Above two scheme requires that feedback voltage signal line feeds back with power module
Network is in good connection status, does not allow phenomena such as missing, misconnection occur.
If bad connection occurs between feedback voltage signal line and power module feedback network, be either not connected to or
Phenomena such as misconnection, the voltage of Power Supplying Equipment voltage output port can be caused constantly to rise, until Power Supplying Equipment voltage
The voltage of output port is equal to the maximum output voltage of power supply.The voltage is input to load end equipment by wire, causes to load
End equipment operation irregularity even can burn load end equipment, cause dangerous and economic loss.
In addition, many application loads are not high to power requirement, it is not necessary to voltage are precisely input, therefore, in power input
The not reserved interface being connected with power module feedback network in end, the power feedback of correlation technique can not just use, shadow
Ring production efficiency and cost input.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned technology to a certain extent.Therefore, the present invention
One purpose is to propose a kind of power feedback of power-supply device, can fed back in feedback voltage signal line and power module
When connection status between network changes, the input voltage of proof load end equipment is less than or equal to rated voltage, and energy
It is enough that line loss on power transfer path is compensated, the input voltage of steady load end equipment, so as to ensure load end
Equipment normal operation.In addition, the power feedback of above-mentioned power-supply device is simple in construction, to voltage-regulation and the place of line loss compensation
Reason speed is also very fast, and applicability is also wider.
Second object of the present invention is to propose a kind of power-supply device.
To reach above-mentioned purpose, a kind of power feedback for power-supply device that first aspect present invention embodiment proposes,
Including：First voltage feedback end and second voltage feedback end n, the first voltage feedback end and second voltage feedback end be used for pair
The positive feedback pin and negative-feedback pin in the power supply wiring port of the power-supply device should be connected；First switch pipe, first opens
The first end for closing pipe is connected with the second voltage feedback end；Second switch pipe, the first end of second switch pipe and described first
Pressure feedback port is connected；
First comparing unit, the first input end of first comparing unit are connected with the second voltage feedback end, institute
State the second input of the first comparing unit and the first reference voltage provides unit and is connected, the output end of first comparing unit
It is connected with the control terminal of the second switch pipe, first comparing unit is used for what is fed back according to the second voltage feedback end
Voltage and first reference voltage provide first the first comparison signal of reference voltage output that unit provides, to control described the
The on or off of two switching tubes；
Second comparing unit, the second input of second comparing unit are connected with the first voltage feedback end, institute
State the first input end of the second comparing unit and the second reference voltage provides unit and is connected, the output end of second comparing unit
It is connected with the control terminal of the first switch pipe, second comparing unit is used for what is fed back according to the first voltage feedback end
Voltage and second reference voltage provide second the second comparison signal of reference voltage output that unit provides, to control described the
The on or off of one switching tube；Differential amplification unit, the first input end of the differential amplification unit and the first switch
Second end of pipe is connected, and the second input of the differential amplification unit is connected with the second end of the second switch pipe, described
Differential amplification unit is used to export feedback voltage to institute according to the on off state of the first switch pipe and the second switch pipe
The voltage regulation unit of power-supply device is stated, output voltage is adjusted according to the feedback voltage for the voltage regulation unit,
So that the output voltage of the power supply wiring port meets the requirement of load end equipment.
The power feedback of power-supply device according to embodiments of the present invention, first voltage feedback end and second voltage feedback
Hold for the positive feedback pin and negative-feedback pin in the corresponding power supply wiring port for connecting power-supply device, the of first switch pipe
One end is connected with first voltage feedback end, and the first end of second switch pipe is connected with second voltage feedback end, the first comparing unit
First reference voltage output of unit offer is provided for the voltage fed back according to second voltage feedback end and the first reference voltage
First comparison signal, to control the on or off of second switch pipe, the second comparing unit is used for according to first voltage feedback end
The voltage of feedback and the second reference voltage provide second the second comparison signal of reference voltage output that unit provides, to control first
The on or off of switching tube, differential amplification unit are used to be exported instead according to the on off state of first switch pipe and second switch pipe
Feed is depressed into the voltage regulation unit of power-supply device, and output voltage is adjusted according to feedback voltage for voltage regulation unit, with
The output voltage of power supply wiring port is set to meet the requirement of load end equipment, thereby, it is possible in feedback voltage signal line and power supply
When connection status changes between module feedback network, the input voltage of proof load end equipment is less than or equal to rated voltage,
Load end equipment normal operation is ensured, and can realize and the line loss on power transfer path is compensated, steady load end
The input voltage of equipment, so as to ensure load end equipment normal operation.In addition, the power feedback of above-mentioned power-supply device
Simple in construction, also very fast to voltage-regulation and the processing speed of line loss compensation, applicability is also wider.
In addition, the power feedback of the power-supply device proposed according to the above embodiment of the present invention can also be with following attached
The technical characteristic added：
In one embodiment of the invention, first comparing unit includes：First comparator, the first comparator
First input end of the negative input end as first comparing unit, the positive input terminal of the first comparator is as described
Second input of one comparing unit, the output end of the output end of the first comparator as first comparing unit, institute
The power end for stating first comparator is connected to the internal operating voltages power supply of the power-supply device, the ground terminal of the first comparator
Ground connection；First resistor, the first resistor are connected between negative input end and the ground terminal of the first comparator.
Further, first reference voltage, which provides unit, includes second resistance and 3rd resistor, the second resistance
One end be connected with the internal reference voltage end of the power-supply device, the other end of the second resistance and the 3rd resistor
One end is connected and has first node, and the other end of the 3rd resistor is grounded, the first node and the first comparator
Positive input terminal be connected, wherein, the reference voltage that the internal reference voltage end of the power-supply device provides is set with the load end
Standby required operating voltage is identical.
In one embodiment of the invention, second comparing unit includes：Second comparator, second comparator
First input end of the negative input end as second comparing unit, the positive input terminal of second comparator is as described
Second input of two comparing units, the output end of the output end of second comparator as second comparing unit, institute
The power end for stating the second comparator is connected to the internal operating voltages power supply of the power-supply device, the ground terminal of second comparator
Ground connection；4th resistance, one end of the 4th resistance positive input terminal with second comparator and the first voltage respectively
Feedback end is connected, the other end ground connection of the 4th resistance.
Further, second reference voltage, which provides unit, includes the 5th resistance and the 6th resistance, the 5th resistance
One end be connected with the internal reference voltage end of the power-supply device, the other end of the 5th resistance and the 6th resistance
One end is connected and has section point, and the other end of the 6th resistance is grounded, the section point and second comparator
Negative input end be connected, wherein, the reference voltage that the internal reference voltage end of the power-supply device provides is set with the load end
Standby required operating voltage is identical.
In one embodiment of the invention, the differential amplification unit includes：8th resistance, the one of the 8th resistance
End is connected with the second end of the first switch pipe；9th resistance, one end and the second switch pipe of the 9th resistance
Second end is connected；Operational amplifier, the positive input terminal of the operational amplifier is connected with the other end of the 9th resistance, described
The negative input end of operational amplifier is connected with the other end of the 8th resistance, described in the output end conduct of the operational amplifier
The output end of differential amplification unit, the power end of the operational amplifier are connected to the internal operating voltages electricity of the power-supply device
Source, the ground terminal ground connection of the operational amplifier；Tenth resistance, the tenth resistance are connected to the negative input of the operational amplifier
Between end and output end；11st resistance, one end of the 11st resistance other end with the 9th resistance and institute respectively
The positive input terminal for stating operational amplifier is connected, the other end ground connection of the 11st resistance；12nd resistance, the 12nd electricity
One end of resistance is connected with one end of the 8th resistance, the other end ground connection of the 12nd resistance.
Further, the differential amplification unit also includes the 7th resistance, one end and the described 9th of the 7th resistance
One end of resistance is connected, and the other end of the 7th resistance is connected with the internal reference voltage end of the power-supply device.
In one embodiment of the invention, the multiplication factor of the differential amplification unit is 1.
In one embodiment of the invention, the first switch pipe and second switch pipe are metal-oxide-semiconductor.
To reach above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of power-supply device, and it includes the present invention the
The power feedback for the power-supply device that one side embodiment proposes.
Power-supply device according to embodiments of the present invention, can be between feedback voltage signal line and power module feedback network
When connection status changes, the input voltage of proof load end equipment is less than or equal to rated voltage, and can realize to electricity
Line loss in the transmission path of source compensates, the input voltage of steady load end equipment, so as to ensure load end equipment just
Often operation.In addition, the power feedback of above-mentioned power-supply device is simple in construction, to voltage-regulation and the processing speed of line loss compensation
Also very fast, applicability is also wider.
In addition, the power-supply device proposed according to the above embodiment of the present invention can also have technical characteristic additional as follows：
In one embodiment of the invention, the power-supply device is power supply adaptor.
Brief description of the drawings
Fig. 1 is the structural representation according to the power feedback of the power-supply device of the embodiment of the present invention；
Fig. 2 is the structural representation according to the power feedback of the power-supply device of one embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The power-supply device of the embodiment of the present invention and its power feedback described below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation according to the power feedback of the power-supply device of the embodiment of the present invention.
As shown in figure 1, the power feedback 100 of the power-supply device of the embodiment of the present invention, including：First voltage feedback end
M and second voltage feedback end n, first switch pipe Q1, second switch pipe Q2, the first comparing unit 110, the second comparing unit 130,
Differential amplification unit 150.
Wherein, first voltage feedback end m and second voltage feedback end n is used for the corresponding supply terminals for connecting power-supply device
Positive feedback pin a and negative-feedback pin b in mouth 200；First switch pipe Q1 first end is connected with second voltage feedback n ends；
Second switch pipe Q2 first end is connected with first voltage feedback end m；The first input end c and second of first comparing unit 110
Pressure feedback port n is connected, and the second input d and the first reference voltage of the first comparing unit 110 provide unit 120 and be connected, the
The output end of one comparing unit 110 is connected with second switch pipe Q2 control terminal, and the first comparing unit 110 is used for according to the second electricity
The voltage and the first reference voltage of pressure feedback end n feedbacks provide the first reference voltage output first that unit 120 provides and compare letter
Number U1, to control second switch pipe Q2 on or off；The the second input f and first voltage of second comparing unit 130 are anti-
Feedback end m is connected, and first input end e and the second reference voltage of the second comparing unit 130 provide unit 140 and be connected, and second compares
The output end of unit is connected with first switch pipe Q1 control terminal, and the second comparing unit 130 is used for according to first voltage feedback end m
The voltage of feedback and the second reference voltage provide second reference voltage output the second comparison signal U2 that unit 140 provides, with control
First switch pipe Q1 processed on or off；The first input end g and first switch pipe Q1 of differential amplification unit 150 the second end
It is connected, the second input h of differential amplification unit 150 is connected with second switch pipe Q2 the second end, and differential amplification unit 150 is used
In the voltage-regulation according to first switch pipe Q1 and second switch pipe Q2 on off state output feedback voltage U3 to power-supply device
Output voltage is adjusted according to feedback voltage for unit 300, voltage regulation unit 300, so that power supply wiring port 200 is defeated
Go out the requirement that voltage meets load end equipment.
Specifically, the second voltage feedback end n of power feedback 100 and the power supply wiring of power-supply device of power-supply device
Negative-feedback pin b in port 200 is connected, and can make to draw from the negative-feedback pin b in the power supply wiring port 200 of power-supply device
Feedback voltage Feedback- be input to the power feedback 100 of power-supply device, wherein, feedback voltage Feedback- can make
For the first input end c of the first comparing unit 110 input.The first voltage feedback of the power feedback 100 of power-supply device
End m is connected with the positive feedback pin a in the power supply wiring port 200 of power-supply device, can make the supply terminals from power-supply device
The feedback voltage Feedback+ that positive feedback pin a in mouth 200 is drawn is input to the power feedback 100 of power-supply device, its
In, feedback voltage Feedback+ can be as the second input f of the second comparing unit 130 input.
In one embodiment of the invention, first switch pipe Q1 and second switch pipe Q2 can be metal-oxide-semiconductor.That is,
When first switch pipe Q1 and second switch pipe Q2 control terminal input high level, first switch pipe Q1 and second switch pipe Q2 are led
It is logical；When first switch pipe Q1 and second switch pipe Q2 control terminal input low level, first switch pipe Q1 and second switch pipe
Q2 is turned off.
In one embodiment of the invention, as shown in Fig. 2 the first comparing unit 110 includes：First comparator OP1 and
First resistor R1.
Wherein, first input end c of the first comparator OP1 negative input end as the first comparing unit 110, first compares
Second input c of the device OP1 positive input terminal as first comparing unit 110, first comparator OP1 output end conduct
The output end of first comparing unit, first comparator OP1 power end are connected to the internal operating voltages power supply V of power-supply devicedd,
First comparator OP1 ground terminal ground connection；First resistor R1 is connected between first comparator OP1 negative input end and ground terminal.
In one embodiment of the invention, as shown in Fig. 2 the first reference voltage, which provides unit 120, includes second resistance
R2 and 3rd resistor R3, wherein, second resistance R2 one end is connected with the internal reference voltage end of power-supply device, second resistance R2
The other end be connected with 3rd resistor R3 one end and there is first node A, 3rd resistor R3 other end ground connection, first node
A is connected with first comparator OP1 positive input terminal, wherein, the reference voltage V of the internal reference voltage end offer of power-supply deviceset
It is identical with the operating voltage required for load end equipment.That is, the reference that the internal reference voltage end of power-supply device provides
Voltage VsetSecond resistance R2 and 3rd resistor R3 both ends are applied to, the voltage at 3rd resistor R3 both ends is can obtain by partial pressure, i.e.,
Voltage at first node A, that is, the first reference voltage provide the first reference voltage that unit 120 provides, and are used as first
The input of comparator OP1 positive input terminal.
Further, the first comparing unit 110 is by comparing feedback voltage Feedback+ and the first reference voltage value
The exportable first comparison signal U1 of size, to control second switch pipe Q2 turn-on and turn-off.Specifically, in feedback voltage
When Feedback+ value is more than the value of the first reference voltage, the first comparison signal U1 of the first comparing unit 110 output can be low
Level, now, second switch pipe Q2 shut-offs；When feedback voltage Feedback+ value is less than the value of the first reference voltage, first
The first comparison signal U1 that comparing unit 110 exports can be high level, now, second switch pipe Q2 conductings.
In one embodiment of the invention, as shown in Fig. 2 the second comparing unit 130 includes：Second comparator OP2 and
4th resistance R4.
Wherein, first input end e of the second comparator OP2 negative input end as the second comparing unit 130, second compares
Second input f of the device OP2 positive input terminal as the second comparing unit 130, the second comparator OP2 output end is as second
The output end of comparing unit 130, the second comparator OP2 power end are connected to the internal operating voltages power supply V of power-supply devicedd,
Second comparator OP2 ground terminal ground connection；4th resistance R4 one end is electric with the second comparator OP2 positive input terminal and first respectively
Pressure feedback end m is connected, the 4th resistance R4 other end ground connection.
In one embodiment of the invention, as shown in Fig. 2 the second reference voltage, which provides unit 140, includes the 5th resistance
R5 and the 6th resistance R6, the 5th resistance R5 one end are connected with the internal reference voltage end of power-supply device, and the 5th resistance R5's is another
One end is connected with the 6th resistance R6 one end and has a section point B, the 6th resistance R6 other end ground connection, section point B with
Second comparator OP2 negative input end is connected, wherein, the reference voltage V of the internal reference voltage end offer of power-supply devicesetWith
Operating voltage required for loading end equipment is identical.That is, the reference electricity that the internal reference voltage end of power-supply device provides
Press VsetBe applied to the 5th resistance R5 and the 6th resistance R6 both ends, the voltage at the 6th resistance R6 both ends is can obtain by partial pressure, i.e.,
Voltage at one node B, that is, the second reference voltage provide the second reference voltage that unit 130 provides, and as the second ratio
The input of negative input end compared with device OP2.
Further, the second comparing unit 130 is by comparing feedback voltage Feedback- and the second reference voltage value
The exportable second comparison signal U2 of size, to control first switch pipe Q1 turn-on and turn-off.Specifically, in feedback voltage
When Feedback- value is more than the value of the second reference voltage, the second comparison signal U2 of the second comparing unit 130 output can be low
Level, now, first switch pipe Q1 shut-offs；When feedback voltage Feedback- value is less than the value of the second reference voltage, second
The second comparison signal U2 that comparing unit 130 exports is high level, now, first switch pipe Q1 conductings.
It should be noted that the inside input voltage V of power-supply deviceinIt is exportable after the conversion of voltage regulation unit 300
Voltage Vout, and powered to load end equipment.
In one embodiment of the invention, as shown in Fig. 2 differential amplification unit includes：8th resistance R8, the 9th resistance
R9, operational amplifier OP3, the tenth resistance R10, the 11st resistance R11 and the 12nd resistance R12.
Wherein, the 8th resistance R8 one end is connected with first switch pipe Q1 the second end；9th resistance R9 one end and the
Two switching tube Q2 the second end is connected；Operational amplifier OP3, operational amplifier OP3 positive input terminal are another with the 9th resistance R9's
One end is connected, and operational amplifier OP3 negative input end is connected with the 8th resistance R8 other end, operational amplifier OP3 output
The output end as differential amplification unit 150 is held, operational amplifier OP3 power end is connected to the internal work electricity of power-supply device
Voltage source Vdd, operational amplifier OP3 ground terminal ground connection；Tenth resistance R1 be connected to operational amplifier OP3 negative input end with it is defeated
Go out between end；11st resistance R11 one end respectively with the 9th resistance R9 other end and operational amplifier OP3 positive input terminal
It is connected, the 11st resistance R11 other end ground connection；12nd resistance R12 one end is connected with the 8th resistance R8 one end, and the 12nd
Resistance R12 other end ground connection.
Further, differential amplification unit 150 also includes the 7th resistance R7, wherein, the 7th resistance R7 one end and the 9th
Resistance R9 one end is connected, and the 7th resistance R7 other end is connected with the internal reference voltage end of power-supply device.
In one embodiment of the invention, the tenth resistance R10 of regulation resistance and the 8th resistance R8 resistance are passed through
Resistance of the ratio equal to the 9th resistance R9 and the 11st resistance R11 resistance, the multiplication factor that can make differential amplification unit 150 are
1。
In one embodiment of the invention, can be by adjusting second resistance R2 and 3rd resistor R3 value, regulation first
Reference voltage provides the value for the first reference voltage that unit 120 provides, and the first reference voltage is provided unit 120 provides first
The value of reference voltage is more than the voltage Feedback- of second voltage feedback end n feedbacks value, and can be by adjusting the 5th resistance R5
With the 6th resistance R6 value, the second reference voltage of regulation provides the value for the second reference voltage that unit 140 provides, makes the second reference
The value for the second reference voltage that voltage providing unit 140 provides is less than the voltage Feedback+'s of first voltage feedback end m feedbacks
Value.
In the first aspect of the present invention specific embodiment, when normal between second voltage feedback end n and negative-feedback pin b
Connection, and between first voltage feedback end m and positive feedback pin a during normal connection, first comparator OP1 negative input end it is defeated
Enter and join for the voltage Feedback- of second voltage feedback end n feedbacks, the input of the second comparator OP2 positive input terminal for first
The first reference voltage of the offer of voltage providing unit 120 is examined, the input voltage of first comparator OP1 positive input terminal is more than first
The input voltage of comparator OP1 negative input end, therefore, the first comparison signal U1 of first comparator OP1 outputs is high level,
Second switch pipe Q2 is turned on；The input of second comparator OP2 negative input end provides the offer of unit 140 for the second reference voltage
Second reference voltage, the input of the second comparator OP2 positive input terminal are the voltage Feedback of first voltage feedback end m feedbacks
+, the input voltage of negative input end of the input voltage more than the second comparator OP2 of the second comparator OP2 positive input terminal, because
This, the second comparison signal U2 of the second comparator OP2 outputs is high level, and first switch pipe Q1 is turned on.Second voltage feedback end n
It is connected by first switch pipe Q1 with the first input end g of differential amplification unit 150, first voltage feedback end passes through second switch
Pipe Q2 is connected with the second input h of differential amplification unit 150, and therefore, the input of the first input end of differential amplification unit is
The voltage signal Feedback- of second voltage feedback end n feedbacks, the second input of differential amplification unit are anti-for the first feedback end
The voltage signal Feedback+ of feedback, the feedback voltage U3 of differential amplification unit output can be inputted to the voltage-regulation of power-supply device
Unit 300, voltage regulation unit 300 can adjust voltage regulation unit according to the internal reference voltage and feedback voltage of power-supply device
300 output voltage VoutSize it is so that the output voltage of power supply wiring port 200 meets the requirement at load equipment end, i.e., negative
The input voltage for carrying equipment end is equal to rated voltage.
In the second aspect of the present invention specific embodiment, opened when between second voltage feedback end n and negative-feedback pin b
Road, and between first voltage feedback end m and positive feedback pin a during normal connection, the input of first comparator OP1 negative input end
For 0, the input of first comparator OP1 positive input terminal provides the first reference voltage that unit 120 provides for the first reference voltage,
The input voltage of negative input end of the input voltage of first comparator OP1 positive input terminal more than first comparator OP1, therefore,
First comparison signal U1 of first comparator OP1 outputs is high level, and second switch pipe Q2 is turned on；Second comparator OP2's is negative
The input of input provides the second reference voltage of the offer of unit 140, the second comparator OP2 positive input for the second reference voltage
The voltage Feedback+ that the input at end is fed back for first voltage feedback end, the input voltage of the second comparator OP2 positive input terminal
The input voltage of negative input end more than the second comparator OP2, therefore, the second comparison signal U2 of the second comparator OP2 outputs
For high level, first switch pipe Q1 conductings.A first resistor R1 terminal voltage is 0, other end ground connection, the 12nd resistance R12's
One terminal voltage is 0, other end ground connection, first voltage feedback end m pass through second switch pipe Q2 and differential amplification unit 150 second
Input is connected, and therefore, the first input end g of differential amplification unit 150 input is 0, and the second of differential amplification unit 150 is defeated
Enter to hold the voltage Feedback+ that h is the first feedback end m feedbacks, so as to obtain the feedback voltage U3 that differential amplification unit 150 exports
For the voltage Feedback+ of the first feedback end m feedbacks, that is to say, that the multiplication factor of differential amplification unit 150 is 1, and by difference
The feedback voltage U3 for dividing amplifying unit 150 to export is input to the voltage regulation unit 300 of power-supply device, to realize to power delivery
The line loss in path carries out certain compensation, and the input voltage for being capable of proof load end equipment is less than or equal to rated voltage, ensures
Equipment safety.
In the third aspect of the present invention specific embodiment, opened when between first voltage feedback end m and positive feedback pin a
Road, and between second voltage feedback end n and negative-feedback pin b during normal connection, the input of first comparator OP1 negative input end
For the voltage Feedback- of second voltage feedback end n feedbacks, the input of the second comparator OP2 positive input terminal is the first reference
The first reference voltage that voltage providing unit 120 provides, the input voltage of first comparator OP1 positive input terminal are more than the first ratio
The input voltage of negative input end compared with device OP1, therefore, the first comparison signal U1 of first comparator OP1 outputs is high level, the
Two switching tube Q2 are turned on；The input of second comparator OP2 negative input end provide that unit 140 provides for the second reference voltage the
Two reference voltages, the input of the second comparator OP2 positive input terminal is 0, and the input of the second comparator OP2 positive input terminal is less than
The input of second comparator OP2 negative input end, therefore, the second comparison signal U2 of the second comparator OP2 outputs is low level,
First switch pipe Q1 is turned off.The voltage of the 12nd resistance R12 one end is 0, other end ground connection, therefore, differential amplification unit 150
First input end g input be 0.4th resistance R4 one end and the electricity of the second input h of differential amplification unit 150 and the 7th
Resistance R7 one end is connected, the 4th resistance R4 other end ground connection, the internal reference of the 7th resistance the R7 other end and power-supply device
Voltage end is connected, that is to say, that the internal reference voltage V of power-supply devicesetIt is applied to the 7th resistance R7 and the 4th resistance R4 two
End, by adjusting the 7th resistance R7 and the 4th resistance R4 resistances, it can adjust the voltage swing at the 4th resistance R4 both ends, you can regulation
The size of second input h of differential amplification unit 150 input voltage, and make the magnitude of voltage close to the inside of power-supply device
Reference voltage VsetValue, exportable magnitude of voltage after differential amplification unit 150, i.e. differential amplification unit 150 output feedback
Internal reference voltage Vs of the voltage U3 close to power-supply deviceset, that is to say, that the multiplication factor of differential amplification unit 150 is 1,
And the voltage regulation unit 300 for the feedback voltage U3 input power equipment for exporting differential amplification unit 150, regulation power supply equipment
Voltage regulation unit 300 output voltage VoutThe feedback voltage U3 exported equal to differential amplification unit 150, to ensure power supply
The output voltage of Wiring port 200 meets the requirement of load end equipment, that is, loads the input voltage of end equipment less than or equal to specified
Voltage, ensure equipment safety.
In the fourth aspect of the present invention specific embodiment, opened when between first voltage feedback end m and positive feedback pin a
Road, and when being opened a way between second voltage feedback end n and negative-feedback pin b, the input of first comparator OP1 negative input end is 0,
First comparator OP1 positive input terminal input for the first reference voltage provide unit 120 provide the first reference voltage, first
The input voltage of negative input end of the input voltage of comparator OP1 positive input terminal more than first comparator OP1, therefore, first
First comparison signal U1 of comparator OP1 outputs is high level, and second switch pipe Q2 is turned on；Second comparator OP2 negative input
The input at end provides the second reference voltage of the offer of unit 140 for the second reference voltage, the second comparator OP2 positive input terminal
Input as 0, the input of negative input end of the input less than the second comparator OP2 of the second comparator OP2 positive input terminal, therefore,
Second comparison signal U2 of the second comparator OP2 outputs is low level, and first switch pipe Q1 is turned off.Can be by adjusting the 7th resistance
R7 and the 4th resistance R4 value, adjust the second input h of differential amplification unit 150 input voltage, and make differential amplification list
Internal reference voltage V of second input h of member 150 input voltage close to power-supply deviceset, through differential amplification unit 150
Internal reference electricity of the feedback voltage U3 of exportable magnitude of voltage afterwards, i.e. differential amplification unit 150 output close to power-supply device
Press Vset, that is to say, that the multiplication factor of differential amplification unit 150 is 1, and the feedback voltage that differential amplification unit 150 is exported
The voltage regulation unit 300 of U3 input power equipment, the output voltage V of the voltage regulation unit 300 of regulation power supply equipmentoutDeng
In the feedback voltage U3 that differential amplification unit 150 exports, to ensure that the output voltage of power supply wiring port 200 meets that load end is set
Standby requirement, that is, the input voltage for loading end equipment are less than or equal to rated voltage, ensure equipment safety.
In the fifth aspect of the present invention specific embodiment, connect when between first voltage feedback end m and negative-feedback pin b
When connecing, and being connected between second voltage feedback end n and positive feedback pin a, the first comparison signal U1 of first comparator OP1 outputs
For low level, and the second comparison signal U2 of the second comparator OP2 outputs is low level, first switch pipe Q1 and second switch pipe
Q2 is turned off.By regulation the 7th resistance R7 and the 4th resistance R4 value, second input of differential amplification unit 150 can be adjusted
H input voltage, and the second input h of differential amplification unit 150 input voltage is joined close to the inside of power-supply device
Examine voltage Vset, the feedback voltage U3 of exportable magnitude of voltage after differential amplification unit 150, i.e. differential amplification unit 150 output
Close to the internal reference voltage V of power-supply deviceset, that is to say, that the multiplication factor of differential amplification unit 700 is 1, and by difference
Divide the voltage regulation unit 300 of the feedback voltage U3 input power equipment of the output of amplifying unit 700, the voltage of regulation power supply equipment
The output voltage V of adjustment unit 300outThe feedback voltage U3 exported equal to differential amplification unit 150, to ensure supply terminals
The output voltage of mouth 200 meets the requirement of load end equipment, that is, the input voltage for loading end equipment is less than or equal to rated voltage, protects
Hinder equipment safety.
In other embodiments of the invention, can be by adjusting second resistance R2 and 3rd resistor R3 value, regulation first
Reference voltage provides the value for the first reference voltage that unit 120 provides, and the first reference voltage is provided unit 120 provides first
The value of reference voltage is less than the voltage Feedback- of second voltage feedback end n feedbacks value, and can be by adjusting the 5th resistance R5
With the 6th resistance R6 value, the second reference voltage of regulation provides the value for the second reference voltage that unit 140 provides, makes the second reference
The value for the second reference voltage that voltage providing unit 140 provides is more than the voltage Feedback+'s of first voltage feedback end m feedbacks
Value.
It should be noted that in one embodiment of the invention, can when load end equipment needs to input constant voltage
Load end equipment is connected with feedback signal line, when load end equipment need not input constant voltage, load end equipment is not required to
To be connected, the output voltage port of voltage regulation unit 300 can be grounded with feedback signal line, think load end equipment power supply.
In one embodiment of the invention, can also be by differential amplification list according to different types of voltage regulation unit 300
The output end connection resistance of member 150, to be adjusted to being input to voltage again after the output voltage U3 of differential amplification unit 150 progress partial pressures
Save unit 300.If voltage regulation unit 300 carries feedback signal port, the feedback signal port can be grounded.
The power feedback of power-supply device according to embodiments of the present invention, first voltage feedback end and second voltage feedback
Hold for the positive feedback pin and negative-feedback pin in the corresponding power supply wiring port for connecting power-supply device, the of first switch pipe
One end is connected with first voltage feedback end, and the first end of second switch pipe is connected with second voltage feedback end, the first comparing unit
First reference voltage output of unit offer is provided for the voltage fed back according to second voltage feedback end and the first reference voltage
First comparison signal, to control the on or off of second switch pipe, the second comparing unit is used for according to first voltage feedback end
The voltage of feedback and the second reference voltage provide second the second comparison signal of reference voltage output that unit provides, to control first
The on or off of switching tube, differential amplification unit are used to be exported instead according to the on off state of first switch pipe and second switch pipe
Feed is depressed into the voltage regulation unit of power-supply device, and output voltage is adjusted according to feedback voltage for voltage regulation unit, with
The output voltage of power supply wiring port is set to meet the requirement of load end equipment, thereby, it is possible in feedback voltage signal line and power supply
When connection status changes between module feedback network, the input voltage of proof load end equipment is less than or equal to rated voltage,
And it can realize and real-Time Compensation is carried out to the line loss on power transfer path, the input voltage of steady load end equipment, so as to
Load end equipment normal operation can be ensured.In addition, the power feedback of above-mentioned power-supply device is simple in construction, to voltage-regulation
Also very fast with the processing speed of line loss compensation, applicability is also wider.
Corresponding above-described embodiment, the present invention also propose a kind of power-supply device.
In one embodiment of the invention, power-supply device can be power supply adaptor.
The power-supply device of the embodiment of the present invention includes the power supply feedback electricity for the power-supply device that the above embodiment of the present invention proposes
Road, its specific embodiment can refer to above-described embodiment, to avoid redundancy, will not be repeated here.
Power-supply device according to embodiments of the present invention, can be between feedback voltage signal line and power module feedback network
When connection status changes, the input voltage of proof load end equipment is less than or equal to rated voltage, and can realize to electricity
Line loss in the transmission path of source carries out real-Time Compensation, the input voltage of steady load end equipment, so as to ensure that load end is set
Standby normal operation.In addition, the power feedback of above-mentioned power-supply device is simple in construction, the processing to voltage-regulation and line loss compensation
Speed is also very fast, and applicability is also wider.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize custom logic function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium, which can even is that, to print the paper of described program thereon or other are suitable
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware with another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized：With the logic gates for realizing logic function to data-signal from
Logic circuit is dissipated, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries
Suddenly it is that by program the hardware of correlation can be instructed to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..Although have been shown and retouch above
Embodiments of the invention are stated, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as the limit to the present invention
System, one of ordinary skill in the art can be changed to above-described embodiment, change, replace and become within the scope of the invention
Type.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (11)
- A kind of 1. power feedback of power-supply device, it is characterised in that including：First voltage feedback end and second voltage feedback end, the first voltage feedback end and second voltage feedback end are used for corresponding Connect the positive feedback pin and negative-feedback pin in the power supply wiring port of the power-supply device；First switch pipe, the first end of first switch pipe are connected with the second voltage feedback end；Second switch pipe, the first end of second switch pipe are connected with the first voltage feedback end；First comparing unit, the first input end of first comparing unit are connected with the second voltage feedback end, and described Second input of one comparing unit provides unit with the first reference voltage and is connected, the output end of first comparing unit and institute The control terminal for stating second switch pipe is connected, and first comparing unit is used for the voltage fed back according to the second voltage feedback end First the first comparison signal of reference voltage output of unit offer is provided with first reference voltage, to control described second to open Close the on or off of pipe；Second comparing unit, the second input of second comparing unit are connected with the first voltage feedback end, and described The first input end of two comparing units provides unit with the second reference voltage and is connected, the output end of second comparing unit and institute The control terminal for stating first switch pipe is connected, and second comparing unit is used for the voltage fed back according to the first voltage feedback end Second the second comparison signal of reference voltage output of unit offer is provided with second reference voltage, to control described first to open Close the on or off of pipe；Differential amplification unit, the first input end of the differential amplification unit are connected with the second end of the first switch pipe, institute The second input for stating differential amplification unit is connected with the second end of the second switch pipe, and the differential amplification unit is used for root The voltage that feedback voltage to the power-supply device are exported according to the on off state of the first switch pipe and the second switch pipe is adjusted Unit is saved, output voltage is adjusted according to the feedback voltage for the voltage regulation unit, so that the supply terminals The output voltage of mouth meets the requirement of load end equipment.
- 2. the power feedback of power-supply device as claimed in claim 1, it is characterised in that the first comparing unit bag Include：First comparator, the first input end of the negative input end of the first comparator as first comparing unit are described Second input of the positive input terminal of first comparator as first comparing unit, the output end of the first comparator are made For the output end of first comparing unit, the power end of the first comparator is connected to the internal work of the power-supply device Voltage source, the ground terminal ground connection of the first comparator；First resistor, the first resistor are connected between negative input end and the ground terminal of the first comparator.
- 3. the power feedback of power-supply device as claimed in claim 2, it is characterised in that first reference voltage provides Unit includes second resistance and 3rd resistor, one end of the second resistance and the internal reference voltage end phase of the power-supply device Even, the other end of the second resistance is connected with one end of the 3rd resistor and has first node, the 3rd resistor The other end is grounded, and the first node is connected with the positive input terminal of the first comparator, wherein, the inside of the power-supply device The reference voltage that reference voltage end provides is identical with the operating voltage required for the load end equipment.
- 4. the power feedback of power-supply device as claimed in claim 1, it is characterised in that the second comparing unit bag Include：Second comparator, the first input end of the negative input end of second comparator as second comparing unit are described Second input of the positive input terminal of second comparator as second comparing unit, the output end of second comparator are made For the output end of second comparing unit, the power end of second comparator is connected to the internal work of the power-supply device Voltage source, the ground terminal ground connection of second comparator；4th resistance, one end of the 4th resistance are anti-with the positive input terminal of second comparator and the first voltage respectively Feedback end is connected, the other end ground connection of the 4th resistance.
- 5. the power feedback of power-supply device as claimed in claim 4, it is characterised in that second reference voltage provides Unit includes the 5th resistance and the 6th resistance, one end of the 5th resistance and the internal reference voltage end phase of the power-supply device Even, the other end of the 5th resistance is connected with one end of the 6th resistance and has section point, the 6th resistance The other end is grounded, and the section point is connected with the negative input end of second comparator, wherein, the inside of the power-supply device The reference voltage that reference voltage end provides is identical with the operating voltage required for the load end equipment.
- 6. the power feedback of the power-supply device as any one of claim 1-5, it is characterised in that the difference is put Big unit includes：8th resistance, one end of the 8th resistance are connected with the second end of the first switch pipe；9th resistance, one end of the 9th resistance are connected with the second end of the second switch pipe；Operational amplifier, the positive input terminal of the operational amplifier are connected with the other end of the 9th resistance, and the computing is put The negative input end of big device is connected with the other end of the 8th resistance, and the output end of the operational amplifier is put as the difference The output end of big unit, the power end of the operational amplifier are connected to the internal operating voltages power supply of the power-supply device, institute State the ground terminal ground connection of operational amplifier；Tenth resistance, the tenth resistance are connected between negative input end and the output end of the operational amplifier；11st resistance, one end of the 11st resistance other end with the 9th resistance and the operational amplifier respectively Positive input terminal be connected, the other end of the 11st resistance ground connection；12nd resistance, one end of the 12nd resistance are connected with one end of the 8th resistance, the 12nd resistance The other end is grounded.
- 7. the power feedback of power-supply device as claimed in claim 6, it is characterised in that the differential amplification unit is also wrapped Include the 7th resistance, one end of the 7th resistance is connected with one end of the 9th resistance, the other end of the 7th resistance with The internal reference voltage end of the power-supply device is connected.
- 8. the power feedback of power-supply device as claimed in claim 1, it is characterised in that the differential amplification unit is put Big multiple is 1.
- 9. the power feedback of power-supply device as claimed in claim 1, it is characterised in that the first switch pipe and second Switching tube is metal-oxide-semiconductor.
- 10. a kind of power-supply device, it is characterised in that include the power supply of power-supply device as claimed in any one of claims 1-9 wherein Feedback circuit.
- 11. power-supply device as claimed in claim 10, it is characterised in that the power-supply device is power supply adaptor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710796568.2A CN107565799B (en) | 2017-09-06 | 2017-09-06 | Power-supply device and its power feedback |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710796568.2A CN107565799B (en) | 2017-09-06 | 2017-09-06 | Power-supply device and its power feedback |
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| CN107565799B CN107565799B (en) | 2019-08-20 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003284327A (en) * | 2002-03-26 | 2003-10-03 | Canon Inc | Power source and method for controlling power source |
| CN202014111U (en) * | 2011-03-15 | 2011-10-19 | 网拓(上海)通信技术有限公司 | Charging device for ni-mh (nickel-metal hydride) battery pack |
| CN203674964U (en) * | 2014-01-16 | 2014-06-25 | 中国长城计算机深圳股份有限公司 | Sampling feedback circuit and power supply circuit |
-
2017
- 2017-09-06 CN CN201710796568.2A patent/CN107565799B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003284327A (en) * | 2002-03-26 | 2003-10-03 | Canon Inc | Power source and method for controlling power source |
| CN202014111U (en) * | 2011-03-15 | 2011-10-19 | 网拓(上海)通信技术有限公司 | Charging device for ni-mh (nickel-metal hydride) battery pack |
| CN203674964U (en) * | 2014-01-16 | 2014-06-25 | 中国长城计算机深圳股份有限公司 | Sampling feedback circuit and power supply circuit |
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