CN107565799B - Power-supply device and its power feedback - Google Patents
Power-supply device and its power feedback Download PDFInfo
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- CN107565799B CN107565799B CN201710796568.2A CN201710796568A CN107565799B CN 107565799 B CN107565799 B CN 107565799B CN 201710796568 A CN201710796568 A CN 201710796568A CN 107565799 B CN107565799 B CN 107565799B
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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, positive feedback pin and negative-feedback pin for being correspondingly connected in the power supply wiring port of power-supply device；First comparing unit, voltage and the first reference voltage for being fed back according to second voltage feedback end provide first the first comparison signal of reference voltage output that unit provides, to control the on or off of second switch；Second comparing unit, voltage and the second reference voltage for being fed back according to first voltage feedback end provide second the second comparison signal of reference voltage output that unit provides, to control the on or off of first switch tube；Differential amplification unit, for exporting the voltage regulation unit of feedback voltage to power-supply device according to the switch state of first switch tube and second switch, voltage regulation unit is adjusted output voltage according to feedback voltage, 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, in particular to the power feedback and a kind of power supply of a kind of power-supply device are set
It is standby.
Background technique
In the related technology, about the design of power feedback, mainly there are two schemes: one is proximal 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；The other is far-end feedback is set feedback voltage signal by voltage supply that is, from load equipment voltage input port lead
Power supply feedback network is accessed in standby voltage output port.Above two scheme requires that feedback voltage signal line and power module are fed back
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 perhaps not connected to or
Phenomena such as misconnection, can cause the voltage of Power Supplying Equipment voltage output port 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 conducting 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, do not need to precisely input voltage, therefore, in power input
There is no the reserved interface connecting with power module feedback network, the power feedbacks of the relevant technologies not just to be available at end, shadow
Ring production efficiency and cost input.
Summary of the invention
The present invention is directed at least solve one of the technical problem in above-mentioned technology to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of power feedback of power-supply device, can feed 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 voltage rating, 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 operates normally.In addition, the power feedback structure of above-mentioned power-supply device is simple, to the place of voltage adjusting and line loss compensation
It is also very fast to manage speed, applicability is also relatively wide.
Second object of the present invention is to propose a kind of power-supply device.
In order to achieve the above objectives, a kind of power feedback for power-supply device that first aspect present invention embodiment proposes,
Include: first voltage feedback end and second voltage feedback end n, the first voltage feedback end and second voltage feedback end 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 tube, first opens
The first end for closing pipe is connected with the second voltage feedback end；Second switch, the first end of second switch 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
It states the second input terminal 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, what first comparing unit was used to be 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 terminal of second comparing unit are connected with the first voltage feedback end, institute
It states 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 tube, what second comparing unit was used to be 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
The second end of pipe is connected, and the second input terminal of the differential amplification unit is connected with the second end of the second switch, described
Differential amplification unit is used to export feedback voltage to institute according to the switch state of the first switch tube and the second switch
The voltage regulation unit of power-supply device is stated, the voltage regulation unit is adjusted output voltage according to the feedback voltage,
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 an embodiment of the present invention, first voltage feedback end and second voltage feedback
Hold positive feedback pin and negative-feedback pin for being correspondingly connected in the power supply wiring port of power-supply device, the of first switch tube
One end is connected with first voltage feedback end, and the first end of second switch is connected with second voltage feedback end, the first comparing unit
Voltage and the first reference voltage for being fed back according to second voltage feedback end provide the first reference voltage output that unit provides
First comparison signal, to control the on or off of second switch, 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 according to the switch state of first switch tube and second switch anti-
Feed is depressed into the voltage regulation unit of power-supply device, and voltage regulation unit is adjusted output voltage according to feedback voltage, 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 voltage rating,
It ensures that load end equipment operates normally, and can be realized and the line loss on power transfer path is compensated, steady load end
The input voltage of equipment, so as to ensure that load end equipment operates normally.In addition, the power feedback of above-mentioned power-supply device
Structure is simple, adjusts to voltage and the processing speed of line loss compensation is also very fast, applicability is also relatively wide.
In addition, the power feedback of the power-supply device proposed according to that above embodiment of the present invention can also have it is 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 terminal of one comparing unit, 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 the negative input end and ground terminal of the first comparator.
Further, it includes second resistance and 3rd resistor, the second resistance that first reference voltage, which provides unit,
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: the 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 terminal of two comparing units, 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 respectively with the positive input terminal of second comparator and the first voltage
Feedback end is connected, the other end ground connection of the 4th resistance.
Further, it includes the 5th resistance and the 6th resistance, the 5th resistance that second reference voltage, which provides unit,
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 second node, and the other end of the 6th resistance is grounded, the second node 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: the 8th resistance, and the one of the 8th resistance
End is connected with the second end of the first switch tube；9th resistance, one end and the second switch 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；Eleventh resistor, one end of the eleventh resistor respectively with the other end of the 9th resistance and institute
The positive input terminal for stating operational amplifier is connected, the other end ground connection of the eleventh resistor；Twelfth resistor, the 12nd electricity
One end of resistance is connected with one end of the 8th resistance, the other end ground connection of the twelfth resistor.
Further, the differential amplification unit further 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 amplification factor of the differential amplification unit is 1.
In one embodiment of the invention, the first switch tube and second switch are metal-oxide-semiconductor.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of power-supply device comprising the present invention the
The power feedback for the power-supply device that one side embodiment proposes.
Power-supply device according to an embodiment 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 voltage rating, and can be realized 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 structure of above-mentioned power-supply device is simple, to the processing speed of voltage adjusting and line loss compensation
Also very fast, applicability is also relatively wide.
In addition, the power-supply device proposed according to that above embodiment of the present invention can also have the following additional technical features:
In one embodiment of the invention, the power-supply device is power supply adaptor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram according to the power feedback of the power-supply device of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram according to the power feedback of the power-supply device of one embodiment of the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The power-supply device and its power feedback of the embodiment of the present invention described with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram 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, comprising: first voltage feedback end
M and second voltage feedback end n, first switch tube Q1, second switch 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 to be correspondingly connected with the supply terminals of power-supply device
Positive feedback pin a and negative-feedback pin b in mouth 200；The first end of first switch tube Q1 is connected with the second voltage feedback end n；
The first end of second switch Q2 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 terminal d of the first comparing unit 110 provides unit 120 with the first reference voltage and is connected, the
The output end of one comparing unit 110 is connected with the control terminal of second switch Q2, 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 feedback provide the first reference voltage output first that unit 120 provides and compare letter
Number U1, to control the on or off of second switch Q2；The the second input terminal f and first voltage of second comparing unit 130 are anti-
It presents end m to be connected, the first input end e of the second comparing unit 130 provides unit 140 with the second reference voltage and is connected, and second compares
The output end of unit is connected with the control terminal of first switch tube Q1, 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
The on or off of first switch tube Q1 processed；The second end of the first input end g and first switch tube Q1 of differential amplification unit 150
It is connected, the second input terminal h of differential amplification unit 150 is connected with the second end of second switch Q2, and differential amplification unit 150 is used
It is adjusted in the voltage for exporting feedback voltage U3 to power-supply device according to the switch state of first switch tube Q1 and second switch Q2
Unit 300, voltage regulation unit 300 are adjusted output voltage according to feedback voltage, so that power supply wiring port 200 is defeated
Voltage meets the requirement of load end equipment out.
Specifically, the power supply wiring of the second voltage feedback end n of the power feedback 100 of power-supply device and power-supply device
Negative-feedback pin b in port 200 is connected, and the negative-feedback pin b from the power supply wiring port 200 of power-supply device can be made to draw
Feedback voltage Feedback- be input to the power feedback 100 of power-supply device, wherein feedback voltage Feedback- can make
For the input of the first input end c of the first comparing unit 110.The first voltage of the power feedback 100 of power-supply device is fed back
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,
In, feedback voltage Feedback+ can be used as the input of the second input terminal f of the second comparing unit 130.
In one embodiment of the invention, first switch tube Q1 and second switch Q2 can be metal-oxide-semiconductor.That is,
When the control terminal input high level of first switch tube Q1 and second switch Q2, first switch tube Q1 and second switch Q2 are led
It is logical；When the control terminal input low level of first switch tube Q1 and second switch Q2, first switch tube Q1 and second switch
Q2 shutdown.
In one embodiment of the invention, as shown in Fig. 2, the first comparing unit 110 include: first comparator OP1 and
First resistor R1.
Wherein, first input end c of the negative input end of first comparator OP1 as the first comparing unit 110, first compares
Second input terminal c of the positive input terminal of device OP1 as first comparing unit 110, the output end conduct of first comparator OP1
The output end of first comparing unit, the power end of first comparator OP1 are connected to the internal operating voltages power supply V of power-supply devicedd,
The ground terminal of first comparator OP1 is grounded；First resistor R1 is connected between the negative input end and ground terminal of first comparator OP1.
In one embodiment of the invention, as shown in Fig. 2, it includes second resistance that the first reference voltage, which provides unit 120,
R2 and 3rd resistor R3, wherein one end of second resistance R2 is connected with the internal reference voltage end of power-supply device, second resistance R2
The other end be connected with one end of 3rd resistor R3 and there is first node A, the other end of 3rd resistor R3 is grounded, first node
A is connected with the positive input terminal of first comparator OP1, wherein the reference voltage V that the internal reference voltage end of power-supply device providesset
It is identical as operating voltage required for load end equipment.That is, the reference that the internal reference voltage end of power-supply device provides
Voltage VsetIt is applied to second resistance R2 and the both ends 3rd resistor R3, the voltage at the both ends 3rd resistor R3 can be obtained by dividing, i.e.,
Voltage at first node A, that is, the first reference voltage provide the first reference voltage that unit 120 provides, and as first
The input of the positive input terminal of comparator OP1.
Further, the first comparing unit 110 by comparing feedback voltage Feedback+ and the first reference voltage value
The exportable first comparison signal U1 of size, to control the turn-on and turn-off of second switch Q2.Specifically, in feedback voltage
When the value of Feedback+ is greater than the value of the first reference voltage, the first comparison signal U1 of the first comparing unit 110 output can be low
Level, at this point, second switch Q2 is turned off；Feedback voltage Feedback+ value less than the first reference voltage value when, first
The first comparison signal U1 that comparing unit 110 exports can be high level, at this point, second switch Q2 is connected.
In one embodiment of the invention, as shown in Fig. 2, the second comparing unit 130 include: the second comparator OP2 and
4th resistance R4.
Wherein, first input end e of the negative input end of the second comparator OP2 as the second comparing unit 130, second compares
Second input terminal f of the positive input terminal of device OP2 as the second comparing unit 130, the output end of the second comparator OP2 is as second
The output end of comparing unit 130, the power end of the second comparator OP2 are connected to the internal operating voltages power supply V of power-supply devicedd,
The ground terminal of second comparator OP2 is grounded；One end of 4th resistance R4 is electric with the positive input terminal of the second comparator OP2 and first respectively
Feedback end m is pressed to be connected, the other end ground connection of the 4th resistance R4.
In one embodiment of the invention, as shown in Fig. 2, it includes the 5th resistance that the second reference voltage, which provides unit 140,
R5 and the 6th resistance R6, one end of the 5th resistance R5 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 one end of the 6th resistance R6 and has second node B, and the other end of the 6th resistance R6 is grounded, second node B with
The negative input end of second comparator OP2 is connected, wherein the reference voltage V that the internal reference voltage end of power-supply device providessetWith
It is identical to load operating voltage required for end equipment.That is, the reference electricity that the internal reference voltage end of power-supply device provides
Press VsetIt is applied to the 5th resistance R5 and the 6th both ends resistance R6, by dividing the voltage at available 6th both ends resistance R6, i.e., the
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 by comparing feedback voltage Feedback- and the second reference voltage value
The exportable second comparison signal U2 of size, to control the turn-on and turn-off of first switch tube Q1.Specifically, in feedback voltage
When the value of Feedback- is greater than the value of the second reference voltage, the second comparison signal U2 of the second comparing unit 130 output can be low
Level, at this point, first switch tube Q1 is turned off；Feedback voltage Feedback- value less than the second reference voltage value when, second
The second comparison signal U2 that comparing unit 130 exports is high level, at this point, first switch tube Q1 is connected.
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 power to load end equipment.
In one embodiment of the invention, as shown in Fig. 2, differential amplification unit includes: the 8th resistance R8, the 9th resistance
R9, operational amplifier OP3, the tenth resistance R10, eleventh resistor R11 and twelfth resistor R12.
Wherein, one end of the 8th resistance R8 is connected with the second end of first switch tube Q1；One end of 9th resistance R9 and the
The second end of two switching tube Q2 is connected；Operational amplifier OP3, the positive input terminal of operational amplifier OP3 are another with the 9th resistance R9's
One end is connected, and the negative input end of operational amplifier OP3 is connected with the other end of the 8th resistance R8, the output of operational amplifier OP3
The output end as differential amplification unit 150 is held, the power end of operational amplifier OP3 is connected to the internal work electricity of power-supply device
Voltage source Vdd, the ground terminal ground connection of operational amplifier OP3；Tenth resistance R1 be connected to the negative input end of operational amplifier OP3 with it is defeated
Between outlet；One end of eleventh resistor R11 positive input terminal with the other end of the 9th resistance R9 and operational amplifier OP3 respectively
It is connected, the other end ground connection of eleventh resistor R11；The one end twelfth resistor R12 is connected with one end of the 8th resistance R8, and the 12nd
The other end of resistance R12 is grounded.
Further, differential amplification unit 150 further includes the 7th resistance R7, wherein one end and the 9th of the 7th resistance R7
One end of resistance R9 is connected, and the other end of the 7th resistance R7 is connected with the internal reference voltage end of power-supply device.
In one embodiment of the invention, pass through the resistance value of the resistance value and the 8th resistance R8 of the tenth resistance R10 of adjusting
The resistance value of the ratio resistance value equal to the 9th resistance R9 and eleventh resistor R11, can make the amplification factor of differential amplification unit 150
1。
In one embodiment of the invention, first can be adjusted by the value of adjusting second resistance R2 and 3rd resistor R3
Reference voltage provides the value for the first reference voltage that unit 120 provides, and the first reference voltage is made to provide unit 120 provides first
The value of reference voltage is greater than the value of the voltage Feedback- of second voltage feedback end n feedback, and can be by adjusting the 5th resistance R5
With the value of the 6th resistance R6, adjusts the second reference voltage and the value for the second reference voltage that unit 140 provides is provided, make 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 feedback
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 when normally being connected between first voltage feedback end m and positive feedback pin a, the negative input end of first comparator OP1 it is defeated
Enter the voltage Feedback- fed back for second voltage feedback end n, the input of the positive input terminal of the second comparator OP2 is the first ginseng
The first reference voltage of the offer of voltage providing unit 120 is examined, the input voltage of the positive input terminal of first comparator OP1 is greater than first
The input voltage of the negative input end of comparator OP1, therefore, the first comparison signal U1 of first comparator OP1 output are high level,
Second switch Q2 conducting；The input of the negative input end of second comparator OP2 provides what unit 140 provided for the second reference voltage
Second reference voltage, the input of the positive input terminal of the second comparator OP2 are the voltage Feedback of first voltage feedback end m feedback
+, the input voltage of negative input end of the input voltage greater than the second comparator OP2 of the positive input terminal of the second comparator OP2, because
This, the second comparison signal U2 of the second comparator OP2 output is high level, first switch tube Q1 conducting.Second voltage feedback end n
It is connected by first switch tube 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 terminal 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 feedback, the second input terminal of differential amplification unit are that the first feedback end is anti-
The voltage signal Feedback+ of feedback, the voltage that the feedback voltage U3 of differential amplification unit output can be input to power-supply device are adjusted
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 voltage rating.
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 when normally being connected between first voltage feedback end m and positive feedback pin a, the input of the negative input end of first comparator OP1
It is 0, the input of the positive input terminal of first comparator OP1 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 the positive input terminal of first comparator OP1 greater than first comparator OP1, therefore,
First comparison signal U1 of first comparator OP1 output is high level, second switch Q2 conducting；Second comparator OP2's is negative
The input of input terminal provides the second reference voltage that unit 140 provides, the positive input of the second comparator OP2 for the second reference voltage
The input at end is the voltage Feedback+ of first voltage feedback end feedback, the input voltage of the positive input terminal of the second comparator OP2
The input voltage of negative input end greater than the second comparator OP2, therefore, the second comparison signal U2 of the second comparator OP2 output
For high level, first switch tube Q1 conducting.One end voltage of first resistor R1 is 0, other end ground connection, twelfth resistor R12's
One end voltage is 0, and other end ground connection, first voltage feedback end m passes through second switch Q2 and the second of differential amplification unit 150
Input terminal is connected, and therefore, the input of the first input end g of differential amplification unit 150 is 0, and the second of differential amplification unit 150 is defeated
Entering to hold h is the voltage Feedback+ of the first feedback end m feedback, so as to obtain the feedback voltage U3 that differential amplification unit 150 exports
For the voltage Feedback+ of the first feedback end m feedback, that is to say, that the amplification factor of differential amplification unit 150 is 1, and will be poor
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 capableing of proof load end equipment is less than or equal to voltage rating, 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 when normally being connected between second voltage feedback end n and negative-feedback pin b, the input of the negative input end of first comparator OP1
For the voltage Feedback- of second voltage feedback end n feedback, the input of the positive input terminal of the second comparator OP2 is the first reference
The first reference voltage that voltage providing unit 120 provides, the input voltage of the positive input terminal of first comparator OP1 are greater 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 output are high level, the
Two switching tube Q2 conducting；The input of the negative input end of second comparator OP2 provide that unit 140 provides for the second reference voltage
Two reference voltages, the input of the positive input terminal of the second comparator OP2 are 0, and the input of the positive input terminal of the second comparator OP2 is less than
The input of the negative input end of second comparator OP2, therefore, the second comparison signal U2 of the second comparator OP2 output are low level,
First switch tube Q1 shutdown.The voltage of one end of twelfth resistor R12 is 0, other end ground connection, therefore, differential amplification unit 150
First input end g input be 0.One end of 4th resistance R4 and the second input terminal h of differential amplification unit 150 and the 7th electricity
The one end for hindering R7 is connected, the other end ground connection of the 4th resistance R4, the internal reference of the other end and power-supply device of the 7th resistance R7
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 is adjusted the voltage swing at the 4th both ends resistance R4, that is, is adjusted by adjusting the 7th resistance R7 and the 4th resistance R4 resistance value
The size of the input voltage of second input terminal h of differential amplification unit 150, and make the voltage value close to the inside of power-supply device
Reference voltage VsetValue, exportable voltage value after differential amplification unit 150, i.e. differential amplification unit 150 output feedback
Internal reference voltage V of the voltage U3 close to power-supply deviceset, that is to say, that the amplification 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, adjust power-supply device
Voltage regulation unit 300 output voltage VoutEqual to the feedback voltage U3 that differential amplification unit 150 exports, to guarantee power supply
The output voltage of Wiring port 200 meets the requirement of load end equipment, i.e. the input voltage of load end equipment is less than or equal to specified
Voltage ensures 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 opening a way between second voltage feedback end n and negative-feedback pin b, the input of the negative input end of first comparator OP1 is 0,
The input of the positive input terminal of first comparator OP1 provides the first reference voltage that unit 120 provides for the first reference voltage, and first
The input voltage of negative input end of the input voltage of the positive input terminal of comparator OP1 greater than first comparator OP1, therefore, first
First comparison signal U1 of comparator OP1 output is high level, second switch Q2 conducting；The negative input of second comparator OP2
The input at end provides the second reference voltage that unit 140 provides for the second reference voltage, the positive input terminal of the second comparator OP2
Input is 0, the input of negative input end of the input less than the second comparator OP2 of the positive input terminal of the second comparator OP2, therefore,
Second comparison signal U2 of the second comparator OP2 output is low level, first switch tube Q1 shutdown.It can be by adjusting the 7th resistance
The value of R7 and the 4th resistance R4, adjust the input voltage of the second input terminal h of differential amplification unit 150, and make differential amplification list
Internal reference voltage V of the input voltage of second input terminal h of member 150 close to power-supply deviceset, through differential amplification unit 150
Internal reference electricity of the feedback voltage U3 of exportable voltage value afterwards, i.e. differential amplification unit 150 output close to power-supply device
Press Vset, that is to say, that the amplification 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 adjusts the output voltage V of the voltage regulation unit 300 of power-supply deviceoutDeng
In the feedback voltage U3 that differential amplification unit 150 exports, set with guaranteeing that the output voltage of power supply wiring port 200 meets load end
The input voltage of standby requirement, i.e. load end equipment is less than or equal to voltage rating, ensures equipment safety.
In the fifth aspect of the invention in 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 output
The second comparison signal U2 for low level, and the second comparator OP2 output is low level, first switch tube Q1 and second switch
Q2 is turned off.The second input terminal of differential amplification unit 150 can be adjusted by the value of the 7th resistance R7 and the 4th resistance R4 of adjusting
The input voltage of h, and join the input voltage of the second input terminal h of differential amplification unit 150 close to the inside of power-supply device
Examine voltage Vset, the feedback voltage U3 of exportable voltage value 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 amplification factor of differential amplification unit 700 is 1, and will be poor
The voltage regulation unit 300 for the feedback voltage U3 input power equipment for dividing amplifying unit 700 to export, adjusts the voltage of power-supply device
Adjust the output voltage V of unit 300outEqual to the feedback voltage U3 that differential amplification unit 150 exports, to guarantee supply terminals
The output voltage of mouth 200 meets the requirement of load end equipment, i.e. the input voltage of load end equipment is less than or equal to voltage rating, guarantor
Hinder equipment safety.
In other embodiments of the invention, first can be adjusted by the value of adjusting second resistance R2 and 3rd resistor R3
Reference voltage provides the value for the first reference voltage that unit 120 provides, and the first reference voltage is made to provide unit 120 provides first
The value of reference voltage is less than the value of the voltage Feedback- of second voltage feedback end n feedback, and can be by adjusting the 5th resistance R5
With the value of the 6th resistance R6, adjusts the second reference voltage and the value for the second reference voltage that unit 140 provides is provided, make the second reference
The value for the second reference voltage that voltage providing unit 140 provides is greater than the voltage Feedback+'s of first voltage feedback end m feedback
Value.
It should be noted that in one embodiment of the invention, it, can when load end equipment needs to input constant voltage
Load end equipment is connect with feedback signal line, when load end equipment does not need input constant voltage, load end equipment is not required to
It to connect, the output voltage port of voltage regulation unit 300 can be grounded with feedback signal line, for load end equipment power supply.
It 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 of member 150 connects resistance, is input to voltage tune again after dividing with the output voltage U3 to differential amplification unit 150
Save unit 300.If voltage regulation unit 300 has feedback signal port, which can be grounded.
The power feedback of power-supply device according to an embodiment of the present invention, first voltage feedback end and second voltage feedback
Hold positive feedback pin and negative-feedback pin for being correspondingly connected in the power supply wiring port of power-supply device, the of first switch tube
One end is connected with first voltage feedback end, and the first end of second switch is connected with second voltage feedback end, the first comparing unit
Voltage and the first reference voltage for being fed back according to second voltage feedback end provide the first reference voltage output that unit provides
First comparison signal, to control the on or off of second switch, 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 according to the switch state of first switch tube and second switch anti-
Feed is depressed into the voltage regulation unit of power-supply device, and voltage regulation unit is adjusted output voltage according to feedback voltage, 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 voltage rating,
And it can be realized to the line loss progress real-time compensation on power transfer path, the input voltage of steady load end equipment, thus
It can ensure that load end equipment operates normally.In addition, the power feedback structure of above-mentioned power-supply device is simple, voltage is adjusted
Also very fast with the processing speed of line loss compensation, applicability is also relatively wide.
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, specific embodiment can refer to above-described embodiment, and to avoid redundancy, details are not described herein.
Power-supply device according to an embodiment 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 voltage rating, and can be realized 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
It is standby to operate normally.In addition, the power feedback structure of above-mentioned power-supply device is simple, the processing to voltage adjusting and line loss compensation
Speed is also very fast, and applicability is also relatively wide.
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 spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing custom logic function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang 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 instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(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 can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when 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 section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware in another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized: have for data-signal is realized the logic gates of logic function from
Logic circuit is dissipated, the 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 understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..Although having been shown and retouching above
The embodiment of the present invention is stated, it is to be understood that above-described embodiment is exemplary, and should not be understood as to limit of the invention
System, those skilled in the art can be changed above-described embodiment, modify, replace and become within the scope of the invention
Type.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It 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 specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
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 be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (11)
1. a kind of power feedback of power-supply device characterized by comprising
First voltage feedback end and second voltage feedback end, the first voltage feedback end and second voltage feedback end are for corresponding to
Connect the positive feedback pin and negative-feedback pin in the power supply wiring port of the power-supply device；
First switch tube, the first end of first switch tube are connected with the second voltage feedback end；
Second switch, the first end of second switch 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 terminal 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 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 that unit provides is provided with first reference voltage, is opened with controlling described second
Close the on or off of pipe；
Second comparing unit, the second input terminal 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 tube 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 that unit provides is provided with second reference voltage, is opened with controlling described first
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 tube, institute
The second input terminal for stating differential amplification unit is connected with the second end of the second switch, and the differential amplification unit is used for root
The voltage tune of feedback voltage to the power-supply device is exported according to the switch state of the first switch tube and the second switch
Unit is saved, the voltage regulation unit is adjusted output voltage according to the feedback voltage, 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 described in claim 1, which is characterized in that the first comparing unit packet
It includes:
First comparator, first input end of the negative input end of the first comparator as first comparing unit are described
The output end of second input terminal of the positive input terminal of first comparator as first comparing unit, the first comparator is 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 the negative input end and ground terminal of the first comparator.
3. the power feedback of power-supply device as claimed in claim 2, which is characterized in that first reference voltage provides
Unit includes second resistance and 3rd resistor, the internal reference voltage end phase of one end of the second resistance and 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
Other end ground connection, the first node are 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 as operating voltage required for the load end equipment.
4. the power feedback of power-supply device as described in claim 1, which is characterized in that the second comparing unit packet
It includes:
Second comparator, first input end of the negative input end of second comparator as second comparing unit are described
The output end of second input terminal of the positive input terminal of second comparator as second comparing unit, second comparator is made
Power end for the output end of second comparing unit, second comparator is connected to the internal work of the power-supply device
Voltage source, the ground terminal ground connection of second comparator；
One end of 4th resistance, the 4th resistance is anti-with the positive input terminal of second comparator and the first voltage respectively
It presents end to be connected, the other end ground connection of the 4th resistance.
5. the power feedback of power-supply device as claimed in claim 4, which is characterized 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 second node, the 6th resistance
Other end ground connection, the second node are 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 as operating voltage required for the load end equipment.
6. the power feedback of power-supply device according to any one of claims 1 to 5, which is characterized in that the difference is put
Big unit includes:
One end of 8th resistance, the 8th resistance is connected with the second end of the first switch tube；
One end of 9th resistance, the 9th resistance is connected with the second end of the second switch；
Operational amplifier, the positive input terminal of the operational amplifier are connected with the other end of the 9th resistance, and the operation 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 the negative input end and output end of the operational amplifier；
Eleventh resistor, one end of eleventh resistor other end and the operational amplifier with the 9th resistance respectively
Positive input terminal be connected, the other end of eleventh resistor ground connection；
Twelfth resistor, one end of the twelfth resistor are connected with one end of the 8th resistance, the twelfth resistor
Other end ground connection.
7. the power feedback of power-supply device as claimed in claim 6, which is characterized 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 described in claim 1, which is characterized in that the differential amplification unit is put
Big multiple is 1.
9. the power feedback of power-supply device as described in claim 1, which is characterized in that the first switch tube and second
Switching tube is metal-oxide-semiconductor.
10. a kind of power-supply device, which is characterized in that the power supply including power-supply device as claimed in any one of claims 1-9 wherein
Feed circuit.
11. power-supply device as claimed in claim 10, which is characterized 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 |
Applications Claiming Priority (1)
| 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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| Publication Number | Publication Date |
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| CN107565799A CN107565799A (en) | 2018-01-09 |
| CN107565799B true 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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