CN110086338A - A kind of line loss compensation circuit of DC/DC converter - Google Patents
A kind of line loss compensation circuit of DC/DC converter Download PDFInfo
- Publication number
- CN110086338A CN110086338A CN201910421731.6A CN201910421731A CN110086338A CN 110086338 A CN110086338 A CN 110086338A CN 201910421731 A CN201910421731 A CN 201910421731A CN 110086338 A CN110086338 A CN 110086338A
- Authority
- CN
- China
- Prior art keywords
- converter
- line loss
- loss compensation
- circuit
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/1566—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators with means for compensating against rapid load changes, e.g. with auxiliary current source, with dual mode control or with inductance variation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of line loss compensation circuits of DC/DC converter, its main feature is that, including a voltage detecting circuit, a current detection circuit and a line loss compensation circuit；The output end of the voltage detecting circuit connection DC/DC converter；The current detection circuit is connected between the output end and load input terminal of DC/DC converter；The both ends of the input terminal connection current detection circuit of the line loss compensation circuit；The Voltage Feedback port of the output end connection DC/DC converter of the line loss compensation circuit；One end of the inverting input terminal connection current sense resistor R_sense of the operational amplifier U1；The drain electrode of the non-inverting input terminal connection MOSFET pipe Q1 of the operational amplifier U1；The grid of the output end connection MOSFET pipe Q1 of the operational amplifier U1.Line loss compensation circuit proposed by the present invention can adjust in real time the output voltage of DC/DC converter, the voltage loss in effective compensation connecting wire according to the fluctuation of output electric current, and the precision of proof load end supply voltage improves the reliability of loaded work piece.
Description
Technical field
The present invention relates to electric and electronic powers to convert field, in particular to a kind of line loss compensation circuit of DC/DC converter.
Background technique
The advantages that DC/DC converter is due to its high efficiency, small size, high power density at present, in computer, communication, vapour
The fields such as vehicle electronics are widely used.DC/DC converter is defeated under conditions of input voltage or load current fluctuations
Constant voltage powering load out.The output end of converter generally goes through longer conducting wire and is connected with load, due to conducting wire electricity
Resistance generates pressure drop, and the actual power voltage of load end is lower than the output voltage of converter, and load terminal voltage is not able to satisfy required
Required precision, cause user equipment can not work normally or functional reliability reduce.For proof load end voltage and transformation
The output voltage of device is consistent, and needs to adjust the output voltage of DC/DC converter in real time according to the design parameter of load current,
With the pressure drop of compensating wire, the constant of load terminal voltage is maintained.
Summary of the invention
The purpose of the present invention is design a kind of line loss compensation circuit of DC/DC converter.
To achieve the goals above, the embodiment of the invention provides a kind of line loss compensation circuits of DC/DC converter, including
One voltage detecting circuit, a current detection circuit and a line loss compensation circuit, the voltage detecting circuit connect DC/DC converter
Output end, the current detection circuit is connected between the output end and load input terminal of DC/DC converter, and the line loss is mended
The both ends of the input terminal connection current detection circuit of circuit are repaid, the output end of the line loss compensation circuit connects DC/DC converter
Voltage Feedback port.
Further, the voltage detecting circuit includes resistance R1 and R2.
Further, the current detection circuit includes resistance R_sense.
Further, the line loss compensation circuit includes operational amplifier U1, MOSFET pipe Q1 and resistance R3, R4.
Further, one end of the inverting input terminal connection current sense resistor R_sense of the operational amplifier U1；It is described
One end of the non-inverting input terminal connection resistance R4 of operational amplifier U1.
Further, the output end of the grid connection operational amplifier U1 of the MOSFET pipe Q1；The MOSFET pipe Q1's
The non-inverting input terminal of drain electrode connection operational amplifier U1；One end of the source electrode connection resistance R3 of the MOSFET pipe Q1；The electricity
Hinder the other end ground connection of R3.
Further, the MOSFET pipe Q1 is managed using N-channel MOS FET.
Further, the DC/DC converter is switching power circuit or linear power source circuit.
The embodiment of the invention provides a kind of line loss compensation circuits of DC/DC converter, are examined by voltage detecting circuit, electric current
Slowdown monitoring circuit and line loss compensation circuit composition.Circuit real-time detection load current adjusts feedback voltage according to the parameter of load current
Value changes the output voltage of DC/DC converter with the voltage drop of compensating wire.The line loss compensation circuit is built simply, is ensured
The supply voltage precision of load end, improves the reliability of DC/DC converter applications.
Detailed description of the invention
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
The detailed description of one step, in which:
Fig. 1 is the transformer configuration block diagram provided in an embodiment of the present invention with line loss compensation circuit；
Fig. 2 is line loss compensation circuit schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with attached drawing, method of the present invention is described in further detail.
Fig. 1 is the transformer configuration block diagram provided in an embodiment of the present invention with line loss compensation circuit, as shown, described
The output end of one end connection DC/DC converter of current detection circuit, the other end connection load of the current detection circuit
Input terminal, the both ends of the input terminal connection current detection circuit of the line loss compensation circuit, the voltage of the line loss compensation circuit
Thermal compensation signal, which exports, gives DC/DC converter.
Fig. 2 is line loss compensation circuit schematic diagram provided in an embodiment of the present invention, as shown, including voltage detecting electricity
Road, a current detection circuit and a line loss compensation circuit, the output end of the voltage detecting circuit connection DC/DC converter, institute
Current detection circuit is stated to be connected between the output end and load input terminal of DC/DC converter, the line loss compensation circuit it is defeated
Enter the both ends of end connection current detection circuit, the Voltage Feedback of the output end connection DC/DC converter of the line loss compensation circuit
Port.
Further, the voltage detecting circuit includes resistance R1 and R2.
Further, the current detection circuit includes resistance R_sense.
Further, the line loss compensation circuit includes operational amplifier U1, MOSFET pipe Q1 and resistance R3, R4.
Further, one end of the inverting input terminal connection current sense resistor R_sense of the operational amplifier U1；It is described
One end of the non-inverting input terminal connection resistance R4 of operational amplifier U1.
Further, the output end of the grid connection operational amplifier U1 of the MOSFET pipe Q1；The MOSFET pipe Q1's
The non-inverting input terminal of drain electrode connection operational amplifier U1；One end of the source electrode connection resistance R3 of the MOSFET pipe Q1；The electricity
Hinder the other end ground connection of R3.
Further, the MOSFET pipe Q1 is managed using N-channel MOS FET.
Further, the DC/DC converter is switching power circuit or linear power source circuit.
The line loss compensation circuit of DC/DC converter provided in an embodiment of the present invention is by voltage detecting circuit, current detecting electricity
Road and line loss compensation circuit composition.Divider resistance R1 and R2 constitute voltage detecting circuit, and voltage sense signal passes to change
The Voltage Feedback port VFB of parallel operation.When the end voltage of divider resistance R2 increases, it is defeated that converter adjusts internal running parameter reduction
Voltage out；When the decline of the end voltage of divider resistance R2, converter adjusts internal running parameter boosted output voltages, to guarantee
Output voltage remains constant.
Due to the presence of conducting wire equivalent impedance R_line, have one between the output end and load input terminal of DC/DC converter
Fixed voltage drop, causes load supplying voltage to be lower than the output voltage of converter, and the functional reliability of load reduces.Current detecting
The current signal of resistance R_sense detection is input to operational amplifier U1, the non-inverting input terminal connection of the operational amplifier U1
One end of resistance R4, one end of the inverting input terminal connection resistance R_sense of the operational amplifier U1.
The output voltage of operational amplifier U1 directly drives MOSFET pipe Q1, the output end connection of the operational amplifier U1
The grid of MOSFET pipe Q1, the drain electrode of the non-inverting input terminal connection MOSFET pipe Q1 of the operational amplifier U1.
When load is in light condition, the pressure difference of current sense resistor R_sense is zero.With the increasing of load current
Greatly, after the pressure difference of current sense resistor R_sense is more than setting value, operational amplifier U1 drives MOSFET pipe Q1 conducting, drags down
The current potential of divider resistance R2, DC/DC converter adjusts internal running parameter boosted output voltages, with the perseverance of proof load end voltage
It is fixed.
The line loss compensation circuit is built and is formed by resistance, operational amplifier and MOSFET pipe, and circuit is simple and reliable, design
It is at low cost.The line loss compensation circuit can adjust in real time the output voltage of DC/DC converter according to the fluctuation of output electric current, have
Voltage loss in effect compensation connecting wire, the precision of proof load end supply voltage improve the reliability of loaded work piece.
The above description is only a preferred embodiment of the present invention, is not intended to restrict the invention, it is clear that those skilled in the art
Various changes and modifications can be made to the invention by member without departing from the spirit and scope of the present invention.If in this way, of the invention
Within the scope of the claims of the present invention and its equivalent technology, then the present invention is also intended to encompass these to these modifications and variations
Including modification and variation.
Claims (6)
1. a kind of line loss compensation circuit of DC/DC converter, it is characterised in that: including a voltage detecting circuit, a current detecting
Circuit and a line loss compensation circuit；The output end of the voltage detecting circuit connection DC/DC converter；The current detection circuit
It is connected between the output end and load input terminal of DC/DC converter；The input terminal connection electric current inspection of the line loss compensation circuit
The both ends of slowdown monitoring circuit；The Voltage Feedback port of the output end connection DC/DC converter of the line loss compensation circuit.
2. converter according to claim 1, it is characterised in that: the voltage detecting circuit includes resistance R1 and R2；Institute
Stating current detection circuit includes resistance R_sense；The line loss compensation circuit includes operational amplifier U1, MOSFET pipe Q1 and electricity
Hinder R3, R4.
3. according to claim 1 to converter described in 2 any claims, it is characterised in that: the operational amplifier U1's
One end of inverting input terminal connection current sense resistor R_sense；The non-inverting input terminal of the operational amplifier U1 connects resistance
One end of R4.
4. according to claim 1 to converter described in 2 any claims, it is characterised in that: the grid of the MOSFET pipe Q1
The output end of pole connection operational amplifier U1；The non-inverting input terminal of the drain electrode connection operational amplifier U1 of the MOSFET pipe Q1；
One end of the source electrode connection resistance R3 of the MOSFET pipe Q1；The other end of the resistance R3 is grounded.
5. according to claim 1 to converter described in 2 any claims, it is characterised in that: the MOSFET pipe Q1 uses N
Channel mosfet pipe.
6. converter according to claim 1, it is characterised in that: the DC/DC converter is switching power circuit or line
Property power circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421731.6A CN110086338A (en) | 2019-05-21 | 2019-05-21 | A kind of line loss compensation circuit of DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910421731.6A CN110086338A (en) | 2019-05-21 | 2019-05-21 | A kind of line loss compensation circuit of DC/DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110086338A true CN110086338A (en) | 2019-08-02 |
Family
ID=67421082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910421731.6A Pending CN110086338A (en) | 2019-05-21 | 2019-05-21 | A kind of line loss compensation circuit of DC/DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110086338A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181355A (en) * | 2020-01-19 | 2020-05-19 | 苏州浪潮智能科技有限公司 | Device and method for adjusting output voltage of power circuit |
| CN112350575A (en) * | 2020-09-11 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Buck circuit for dynamically adjusting output voltage and dynamic adjusting method |
| CN113687679A (en) * | 2021-07-06 | 2021-11-23 | 逸超科技(北京)有限公司 | Cable voltage drop compensation circuit and ultrasonic imaging system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333221A (en) * | 2014-10-23 | 2015-02-04 | 中山大学 | Adaptive line loss compensation circuit for DC-DC (direct current) converter |
| CN106160472A (en) * | 2016-08-11 | 2016-11-23 | 深圳欧创芯半导体有限公司 | Line loss compensation method and device for electric pressure converter |
| CN106655777A (en) * | 2017-02-20 | 2017-05-10 | 苏州智浦芯联电子科技股份有限公司 | Switching power supply output cable pressure drop compensating circuit and compensating method |
| CN107482909A (en) * | 2017-07-28 | 2017-12-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of line loss compensation circuit of power supply |
| CN108923645A (en) * | 2018-06-29 | 2018-11-30 | 苏州锴威特半导体有限公司 | A kind of switching power circuit with line loss compensation |
-
2019
- 2019-05-21 CN CN201910421731.6A patent/CN110086338A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333221A (en) * | 2014-10-23 | 2015-02-04 | 中山大学 | Adaptive line loss compensation circuit for DC-DC (direct current) converter |
| CN106160472A (en) * | 2016-08-11 | 2016-11-23 | 深圳欧创芯半导体有限公司 | Line loss compensation method and device for electric pressure converter |
| CN106655777A (en) * | 2017-02-20 | 2017-05-10 | 苏州智浦芯联电子科技股份有限公司 | Switching power supply output cable pressure drop compensating circuit and compensating method |
| CN107482909A (en) * | 2017-07-28 | 2017-12-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of line loss compensation circuit of power supply |
| CN108923645A (en) * | 2018-06-29 | 2018-11-30 | 苏州锴威特半导体有限公司 | A kind of switching power circuit with line loss compensation |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111181355A (en) * | 2020-01-19 | 2020-05-19 | 苏州浪潮智能科技有限公司 | Device and method for adjusting output voltage of power circuit |
| CN111181355B (en) * | 2020-01-19 | 2021-06-01 | 苏州浪潮智能科技有限公司 | Device and method for adjusting output voltage of power circuit |
| CN112350575A (en) * | 2020-09-11 | 2021-02-09 | 苏州浪潮智能科技有限公司 | Buck circuit for dynamically adjusting output voltage and dynamic adjusting method |
| CN113687679A (en) * | 2021-07-06 | 2021-11-23 | 逸超科技(北京)有限公司 | Cable voltage drop compensation circuit and ultrasonic imaging system |
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Application publication date: 20190802 |