CN109546845A - Based on the series-parallel electronic load circuit of MOSFET and fixed resistance - Google Patents
Based on the series-parallel electronic load circuit of MOSFET and fixed resistance Download PDFInfo
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- CN109546845A CN109546845A CN201811630749.9A CN201811630749A CN109546845A CN 109546845 A CN109546845 A CN 109546845A CN 201811630749 A CN201811630749 A CN 201811630749A CN 109546845 A CN109546845 A CN 109546845A
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- mosfet
- resistance
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- load
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- 230000005611 electricity Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- H02M1/00—Details of apparatus for conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention belongs to DC circuit fields, and in particular to a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance, including multiple load units, the load unit include: MOSFET, are two MOSFET, described two MOSFET series connection；Resistance, it is in parallel again with concatenated two MOSFET；Wherein, multiple load units compose in parallel electronic load circuit.The present invention improves the stability based on MOSFET and fixed resistance series-parallel electronic load circuit.
Description
Technical field
The invention belongs to DC circuit fields, and in particular to a kind of Electronic Negative series-parallel based on MOSFET and fixed resistance
Carry circuit.
Background technique
Traditional electronic load circuit is controlled by single triode or MOSFET work in linear zone, electronic load
Power is much, and the power of triode or MOSFET consumption is with regard to much.Triode or MOSFET belong to temperature sensor, knot
Warm height will be burnt to a certain extent.This circuit can reduce triode or MOSFET itself by accessing certain fixed resistance
Power consumption, improve triode or the stability of MOSFET.
It solves the above problems to realize, present invention employs a kind of electronics series-parallel based on MOSFET and fixed resistance
Load circuit.
Summary of the invention
It is excellent it is an object of the invention to solve at least the above problems and/or defect, and provide at least to will be described later
Point.
It is a still further object of the present invention to provide a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance,
Greatly improve triode or the stability of MOSFET.
It is a still further object of the present invention to provide a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance,
Which raises the stability based on MOSFET and fixed resistance series-parallel electronic load circuit.
In order to realize these purposes and other advantages according to the present invention, the present invention provides a kind of based on MOSFET and solid
Determine the series-parallel electronic load circuit of resistance, including multiple load units, the load unit includes:
MOSFET is two MOSFET, described two MOSFET series connection；
Resistance, it is in parallel again with concatenated two MOSFET；
Wherein, multiple load units compose in parallel electronic load circuit.
Preferably, when multiple load units are a load unit comprising the first MOSFET, the 2nd MOSFET and the
One resistance, the source electrode of the first MOSFET are connected to drain electrode and the contact of the first resistor of the 2nd MOSFET, institute
The drain electrode for stating the first MOSFET is connected to the first resistor；
Preferably, when the multiple load unit is two load units, second load unit therein includes the
Three MOSFET, the 4th MOSFET and second resistance, the 3rd MOSFET connect with the 4th MOSFET, the second resistance
It connects with the 3rd MOSFET；
Wherein, the source electrode of the 3rd MOSFET is connected to the drain electrode of the 4th MOSFET and connecing for the second resistance
The drain electrode of point, the 3rd MOSFET is connected to the second resistance；
Wherein, the 3rd MOSFET and the 4th MOSFET and the first MOSFET and the 2nd MOSFET be simultaneously
Connection, the first resistor and the second resistance are in parallel.
Preferably, the model of each MOSFET in multiple load units is identical, each electricity in multiple load units
The resistance value of resistance is different.
The present invention is include at least the following beneficial effects:
1, a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance provided by the invention, plurality of mould
The function of block module is identical, only because the resistance value of resistance in parallel is different, can respectively divide in different operating voltages
The dissipated power of load is maximum, so that the dissipated power for undertaking MOSFET is minimum.
2, a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance provided by the invention, structure letter
It is single, it is at low cost, there is the market competitiveness, convenient for promoting.
3, a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance provided by the invention, passes through access
Certain fixed resistance reduces the power consumption of MOSFET itself, improves the stability of MOSFET.
Detailed description of the invention
Fig. 1 is one embodiment of the electronic load circuit series-parallel based on MOSFET and fixed resistance of the present invention
Circuit fundamental diagram；
Fig. 2 is that the circuit work of the electronic load circuit series-parallel based on MOSFET and fixed resistance of the present invention is former
Reason figure；
Wherein, Q1 is the first MOSFET, and Q2 is the 2nd MOSFET, and Q3 is the 3rd MOSFET, and Q4 is the 4th MOSFET, and R1 is
First resistor, R2 are second resistance, and Q2N-1 is 2N-1MOSFET, and Q2N is 2NMOSFET, and RN is N resistance.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
In the present specification, when an element is mentioned as " be connected to or be coupled to " another element or " is arranged another
In one element " when, can " direct " be connected to or be coupled to another element or it is " direct " be arranged in another element.Or with
The intervenient mode of other elements is connected to or is coupled to another element or is arranged in another element, unless it is by volume
" be coupled directly to or be connected to " another element or " directly setting " are in another element.Furthermore, it is to be understood that when an element quilt
It, can when referring to as " on another element ", " above another element ", " under another element " or " below another element "
It contacts with another element " direct " or is contacted in a manner of having intervened other elements therebetween with another element, unless it is mentioned as
It is directly contacted with another element.
As shown in Fig. 2, the present invention provides a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance, packet
Multiple load units are included, the load unit includes:
MOSFET is two MOSFET, described two MOSFET series connection；
Resistance, it is in parallel again with concatenated two MOSFET；
Wherein, multiple load units compose in parallel electronic load circuit.
For convenience of explanation, wherein the load unit that multiple load units include can successively be defined as the first load list
Member, the second load unit, third load unit ..., N load unit, wherein two MOSFET in the first load unit
It can be successively defined as the first MOSFET, the 2nd MOSFET, resistance is defined as first resistor, similarly, in N load unit
MOSFET and resistance, being defined as Q2N-1 is 2N-1MOSFET, and Q2N is 2NMOSFET, and RN is N resistance.
On the basis of above situation, another embodiment, when multiple load units are a load unit comprising the
The source electrode of one MOSFET, the 2nd MOSFET and first resistor, the first MOSFET is connected to the drain electrode of the 2nd MOSFET
Drain electrode with the contact of the first resistor, the first MOSFET is connected to the first resistor；
Wherein, the grid connection of the first MOSFET and the grid of the 2nd MOSFET are all connection control circuits.
On the basis of the above embodiments, another embodiment, as shown in Figure 1, the multiple load unit is two negative
When carrier unit, second load unit therein includes the 3rd MOSFET, the 4th MOSFET and second resistance, the third
MOSFET connects with the 4th MOSFET, and the second resistance is connected with the 3rd MOSFET；
Wherein, the source electrode of the 3rd MOSFET is connected to the drain electrode of the 4th MOSFET and connecing for the second resistance
Point, the drain electrode of the 3rd MOSFET are connected to the second resistance, the grid connection of the 3rd MOSFET and the described 4th
The grid of MOSFET is all connection control circuit.
Wherein, the 3rd MOSFET and the 4th MOSFET and the first MOSFET and the 2nd MOSFET be simultaneously
Connection, the first resistor and the second resistance are in parallel.
Wherein, the model of each MOSFET in multiple load units is identical, each resistance in multiple load units
Resistance value is different.
The grid of each MOSFET in multiple load units connects to the control circuit.
The working principle of the invention: it is illustrated so that multiple load units are two load units as an example:
The function of two the first load units of module and the second load unit is identical in Fig. 1, only because R1 and R2
Resistance value it is different, the dissipated power that can respectively share in different operating voltages is maximum.It is analyzed by taking the first module as an example below
Its working principle.If:
The all-in resistance of R: the first module；
The resistance of RQ1:MOSFETQ1；
The resistance of RQ2:MOSFETQ2；
RDSON:MOSFETQ1, MOSFETQ2 fully on resistance, if all MOSFET are using same model
MOSFET, RDSON are consistent；
According to circuit diagram, it can be deduced that the all-in resistance R=RQ1//R1+RQ2 of the first module, when Q1, Q2 are opened completely
RQ1=RQ2=RDSON；Although the first module has minimum resistance Rmin=2*RDSON electric current at this time when R1 is much larger than RDSON
It is very big, but voltage is very low, power consumption is little whole MOSFET undertakes.With the increase of voltage, it is desirable that electronic load is inhaled
When the power of receipts increases, we can reduce the grid voltage of Q1, and RQ1 is allowed to increase, and the voltage and current on such R1 can all increase
Add.It plays and most of power is shared by R1 when electronic load needs to absorb high-power.When Q2 cut-off, RQ2 is infinitely great, institute
It is also infinitely great with the all-in resistance R of module.So we can reduce the grid electricity of Q2 when electronic load needs to absorb low current
Pressure increases RQ2.Need to increase the resistance value of R2 if R1 to be allowed carries on a shoulder pole more power, so needing using multiple and different resistance values
Resistance participate in wired in parallel have reached voltage difference variation when reduce MOSFET power consumption.
The present invention provides based on a kind of scheme in parallel again after MOSFET and the series-parallel comprising modules of fixed resistance, lead to
It crosses and fixed resistance (module formed using different fixed resistance R is in parallel again to adapt to different voltage and currents later) is allowed to undertake most
The dissipated power that the control of high current voltage undertakes MOSFET is minimum.
The invention discloses a kind of by the series-parallel based on MOSFET and fixed resistance of MOSFET and electricity group mixing control
Electronic load circuit, traditional electronic load circuit are controlled by single triode or MOSFET work in linear zone, electronics
The power of load is much, and the power of triode or MOSFET consumption is with regard to much.Triode or MOSFET belong to temperature sensitivity
Device, junction temperature height will be burnt to a certain extent.This circuit can by access certain fixed resistance reduce triode or
The power consumption of MOSFET itself improves triode or the stability of MOSFET.
It is readily apparent that those skilled in the art can obtain from the various structures of embodiment according to the present invention
Obtain the various effects not yet referred directly to according to unpainful each embodiment.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With.It can be applied to various suitable the field of the invention completely.It for those skilled in the art, can be easily
Realize other modification.Therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (4)
1. a kind of electronic load circuit series-parallel based on MOSFET and fixed resistance, which is characterized in that single including multiple loads
Member, the load unit include:
MOSFET is two MOSFET, described two MOSFET series connection；
Resistance, it is in parallel again with concatenated two MOSFET；
Wherein, multiple load units compose in parallel electronic load circuit.
2. the electronic load circuit series-parallel based on MOSFET and fixed resistance as described in claim 1, which is characterized in that more
When a load unit is a load unit comprising the first MOSFET, the 2nd MOSFET and first resistor, described first
The source electrode of MOSFET is connected to drain electrode and the contact of the first resistor of the 2nd MOSFET, the leakage of the first MOSFET
Pole is connected to the first resistor.
3. the electronic load circuit series-parallel based on MOSFET and fixed resistance as claimed in claim 2, which is characterized in that institute
State multiple load units be two load units when, second load unit therein include the 3rd MOSFET, the 4th MOSFET
And second resistance, the 3rd MOSFET connect with the 4th MOSFET, the second resistance and the 3rd MOSFET go here and there
Connection；
Wherein, the source electrode of the 3rd MOSFET is connected to drain electrode and the contact of the second resistance of the 4th MOSFET,
The drain electrode of 3rd MOSFET is connected to the second resistance；
Wherein, the 3rd MOSFET and the 4th MOSFET are in parallel with the first MOSFET and the 2nd MOSFET,
The first resistor and the second resistance are in parallel.
4. the electronic load circuit series-parallel based on MOSFET and fixed resistance as described in claim 1, which is characterized in that more
The model of each MOSFET in a load unit is identical, and the resistance value of each resistance in multiple load units is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630749.9A CN109546845B (en) | 2018-12-29 | 2018-12-29 | Electronic load circuit based on MOSFET and fixed resistor series-parallel connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811630749.9A CN109546845B (en) | 2018-12-29 | 2018-12-29 | Electronic load circuit based on MOSFET and fixed resistor series-parallel connection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109546845A true CN109546845A (en) | 2019-03-29 |
| CN109546845B CN109546845B (en) | 2024-08-20 |
Family
ID=65831047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811630749.9A Active CN109546845B (en) | 2018-12-29 | 2018-12-29 | Electronic load circuit based on MOSFET and fixed resistor series-parallel connection |
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Citations (18)
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| NL7513099A (en) * | 1974-11-07 | 1976-05-11 | Hitachi Ltd | COMPENSATED PULSE GENERATOR. |
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| NL7513099A (en) * | 1974-11-07 | 1976-05-11 | Hitachi Ltd | COMPENSATED PULSE GENERATOR. |
| CN1060744A (en) * | 1990-10-12 | 1992-04-29 | 雷伊化学有限公司 | Overcurrent protective device |
| JPH08154024A (en) * | 1994-06-13 | 1996-06-11 | Takeshi Ikeda | Tuned amplifier |
| JPH1032475A (en) * | 1996-05-17 | 1998-02-03 | Denso Corp | Load driving circuit |
| JP2000193692A (en) * | 1998-12-28 | 2000-07-14 | Yazaki Corp | Over-current detection circuit and over-current detection/protection circuit |
| US20020149036A1 (en) * | 2001-04-11 | 2002-10-17 | Kabushiki Kaisha Toshiba | Semiconductor integrated circuit |
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| Publication number | Publication date |
|---|---|
| CN109546845B (en) | 2024-08-20 |
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