CN106100292A - A kind of small power DC power supply able to programme and power configuration method - Google Patents
A kind of small power DC power supply able to programme and power configuration method Download PDFInfo
- Publication number
- CN106100292A CN106100292A CN201610704187.2A CN201610704187A CN106100292A CN 106100292 A CN106100292 A CN 106100292A CN 201610704187 A CN201610704187 A CN 201610704187A CN 106100292 A CN106100292 A CN 106100292A
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- difference amplifier
- power supply
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- voltage
- power
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- 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
- H02M1/0083—Converters characterised by their input or output configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Amplifiers (AREA)
Abstract
A kind of small power DC power supply able to programme and power configuration method, this power supply includes: power module, it is made up of external power source, linear power supply, electric charge pump, linear power supply is powered by external power source and is produced direct current malleation, electric charge pump is powered by external power source and is produced direct current negative pressure, and power module to each difference amplifier to power to produce positive and negative direct voltage output；Microcontroller, including AD conversion unit module, D/A conversion unit module and several I/O mouths, and electrically connects with external control mouth；First, second and third difference amplifier；Single-pole double-throw switch (SPDT)；First and second switch；Sampling resistor；Adder；This DC source can be programmed and be configured to constant pressure source or constant-current source exports to external circuitry；Present configuration is simple, convenient configuration, it is possible to the small voltage required for providing conveniently, flexibly for automotive test field and current range.
Description
Technical field
The present invention, about the small power DC power supply able to programme of a kind of field tests and power configuration method, particularly relates to
A kind of small power DC power supply able to programme simulating the output of various sensors for automotive test field.
Background technology
A few days ago, in a lot of field tests, often there is a need to simulate the application scenario of some sensors output.Common, pass
The collection capacity of sensor is all to export to outer detecting circuit with electric current or voltage form, is requiring that strict such as automobile is led
Territory, test request does various detection for each functional module, and it is defeated that this just requires to must provide for simulating various sensor
Going out the equipment of feature, can to detect each middle functional module the most normal.
Traditional programmable power supply volume is big, and power is big, and price is high, and the output characteristic one of sensor in automotive field
As be all low-voltage, the occasion of small area analysis, it is desirable to programmed configurations is more flexible；Use conventional programmable voltage cost performance very
Difference, operation complexity, can not meet many operational requirements.And low power programmable power supply meets this test very much
Demand.
Summary of the invention
For solving to there are the problems referred to above in prior art, specific embodiments of the present invention is as follows:
The invention provides a kind of small power DC power supply able to programme, it is characterised in that this DC source includes:
Power module, it is inputted power supply by outside, linear power supply, electric charge pump are constituted, and described linear power supply is by described
Outside input power supply produces direct-flow positive voltage, and described electric charge pump is produced direct current negative electricity by described outside input power supply
Pressure, described power module is that the power pin of following each difference amplifier powers to produce positive and negative direct voltage output；
Microcontroller, this microcontroller includes AD conversion unit module, D/A conversion unit module and several I/O mouths
Constituting, described microcontroller is electrically connected with external control mouth by described I/O mouth；
First difference amplifier；Second difference amplifier；3rd difference amplifier；Single-pole double-throw switch (SPDT)；First switch；The
Two switches；Sampling resistor；Adder；
Described DC source is programmed when being configured to constant pressure source output, and constant voltage power supply circuit includes described microcontroller, hilted broadsword
Commutator, the first difference amplifier and the first switch, described first difference amplifier is connected by described single-pole double-throw switch (SPDT)
To the D/A conversion unit module of described microcontroller, the outfan of described first difference amplifier is connected to by the first switch
Constant source voltage delivery outlet, and be connected with external circuitry by constant source voltage delivery outlet；
Described DC source is programmed when being configured to constant-current source output, and constant-current source circuit includes described microcontroller, hilted broadsword
Commutator, the second difference amplifier, sampling resistor, the 3rd difference amplifier, adder and second switch, described second difference
Amplifier is connected to the D/A conversion unit module of described microcontroller by described single-pole double-throw switch (SPDT), and described second difference is put
The outfan of big device is connected to one end of described sampling resistor, and two differential input ends of the 3rd difference amplifier are coupled with institute
Stating the two ends of sampling resistor, described 3rd difference amplifier is connected to the analog digital conversion of described microcontroller by described adder
Unit module, the other end of described sampling resistor connects constant-current source electric current delivery outlet, and by constant-current source electric current delivery outlet with outer
Boundary's circuit is connected.
Coordinating resolution element to realize addition and subtraction counting circuit, signal amplification circuit etc. by operational amplifier, amplifier is put
Signal on big sampling resistor is supplied to microcontroller, and microcontroller receives and wants remote control signal, and according to sample circuit
Feedback adjusts the voltage and current of output in real time；Described microcontroller is single-chip microcomputer or DSP；Described linear power supply is defeated by outside
Enter power supply power generation+9V direct-flow positive voltage, described electric charge pump by outside input power supply power generation-9V direct current bear
Voltage.
Further, first, second and third described difference amplifier model is SGM8425.
Further, described sampling resistor is 5 ohm.
A kind of programmed configurations method of described small power DC power supply able to programme, described DC source is programmed to perseverance
During stream source module output, receiving on external equipment by programmable constant-current source output, described single-chip microcomputer controls institute by described I/O mouth
Stating single-pole double-throw switch (SPDT) and be switched to described this direction of second difference amplifier, the most described second switch closes, when needs are defeated
When going out a certain current value, how much current being presently required by described external control mouth notice single-chip microcomputer, externally output is still from outward
Portion absorbs electric current；Described single-chip microcomputer adjusts output voltage by built-in described D/A conversion unit module, thus impact is described
The output voltage of the second difference amplifier, current value is transformed into magnitude of voltage, described 3rd difference amplifier by described sampling resistor
Magnitude of voltage is amplified to suitable size, and the output of the 3rd difference amplifier plus positive bias voltage, is made described by described adder
The negative voltage that 3rd difference amplifier may export is changed into the AD conversion unit module of described single-chip microcomputer and just can detect
Voltage is for detection, if single-chip microcomputer detects that voltage is less than normal, corresponding externally output electric current is less than normal, then incrementally increase described digital-to-analogue
The output voltage of converting unit module, thus improve the output voltage values of described second difference amplifier until output electric current reaches
The value needed.In like manner, when exporting electric current and needing to diminish, adjust toward rightabout.
Owing to this is fed back to dynamic process, so driving force and working power at described second difference amplifier are electric
In the range of pressure, current value accurately can be obtained, and owing to described second difference amplifier works in positive-negative power pattern, institute
Both electric current can be externally exported with this constant-current source and electric current can also be absorbed from outside.
When described DC source is programmed to the output of constant pressure source pattern, constant source voltage delivery outlet is received external equipment
On, single-pole double-throw switch (SPDT) described in described Single-chip Controlling is switched to described this direction of first difference amplifier, and described first opens
Closing Guan Bi, described second switch turns off, owing to the external circuit of described first difference amplifier is fixed, so amplification is also solid
Fixed, described single-chip microcomputer has only to receive external input signal and arranges the output voltage of suitable D/A conversion unit module, just can
Access output voltage accurately；Thus reach to configure the function of controllable constant potential source.
Present configuration is simple, convenient configuration, it is possible to convenient, flexibly provide for automotive test field required for less
Voltage and current scope.
Accompanying drawing explanation
In order to be easier to understand the present invention, below by accompanying drawing, the present invention is further elaborated.
Fig. 1 is the structured flowchart of present invention small power DC able to programme power supply comprising modules；
Fig. 2 is the practical circuit diagram of present invention small power DC able to programme power supply.
Reference:
1. outside input power supply 2. linear power supply 3. electric charge pump 4. microcontroller 5. D/A conversion unit module
6. single-pole double-throw switch (SPDT) 7. first difference amplifier 8. first switch 9. second switch 10. constant source voltage delivery outlets 11.
Constant-current source electric current delivery outlet 12. sampling resistor 13. adder 14. external control mouth 15. AD conversion unit module 16.
Two difference amplifier 17. the 3rd difference amplifiers.
Above-mentioned accompanying drawing is only used for aiding in illustrating the technology contents of the present invention, is not necessarily drawn to scale, thus is not construed as
Limiting the scope of the invention.
Detailed description of the invention
As shown in Figure 1-2, the invention provides a kind of small power DC power supply able to programme, this DC source includes: power supply
Module, it is made up of outside input power supply 1, linear power supply 2, electric charge pump 3, and described linear power supply 2 is by described outside input
Power supply 1 produces direct-flow positive voltage, and described electric charge pump 3 is produced negative DC voltage by described outside input power supply 1, described
Power module is that the power pin of following first, second and third difference amplifier powers to produce positive and negative direct voltage output；
Single-chip microcomputer 4, single-chip microcomputer 4 includes AD conversion unit module 5, D/A conversion unit module 15 and several I/O mouths
Constituting, single-chip microcomputer 4 is electrically connected with external control mouth 14 by described I/O mouth；
First difference amplifier 7；Second difference amplifier 16；3rd difference amplifier 17；Single-pole double-throw switch (SPDT) 6；First
Switch 8；Second switch 9；Sampling resistor 12；Adder 13 discrete component such as grade；
When described DC source is programmed to constant pressure source output, constant voltage power supply circuit is by described single-chip microcomputer 4, single-pole double-throw switch (SPDT)
6, the first difference amplifier 7 and the first switch 8 composition, and be connected with external circuitry by constant source voltage delivery outlet 10；
This DC source be programmed to constant-current source output time, constant-current source circuit by described single-chip microcomputer 4, single-pole double-throw switch (SPDT) 6,
Second difference amplifier 16, sampling resistor the 12, the 3rd difference amplifier 17, adder 13 and second switch 9 are constituted, and by perseverance
Stream source electric current delivery outlet 11 is connected with external circuitry.
Real work flow process and collocation method are as follows:
Constant-current source pattern: receiving on external equipment by programmable constant-current source output, single-chip microcomputer 4 controls hilted broadsword by I/O mouth
Commutator 6 is switched to second this direction of difference amplifier 16, and second switch 9 closes simultaneously, when needs export a certain electric current
During value, notifying that single-chip microcomputer 4 needs how much current now by external control mouth 14, externally output still absorbs electric current from outside；
Single-chip microcomputer 4 adjusts output voltage by built-in DAC converting unit module 5, affects the output voltage of the second difference amplifier 2,
Current value is transformed into magnitude of voltage by sampling resistor 12, and magnitude of voltage is amplified to suitable size, adder by the 3rd difference amplifier 17
The output of the 3rd difference amplifier 17 is turned by 13 plus positive bias voltage, the negative voltage making the 3rd difference amplifier 17 to export
Become the positive voltage confession detection that the ADC converting unit module 15 of single-chip microcomputer 4 can detect, if single-chip microcomputer 4 detects that voltage is inclined
Little, corresponding externally output electric current is less than normal, then incrementally increase the output voltage of DAC converting unit module 5, thus it is poor to improve second
Divide the output voltage values of amplifier 16 until output electric current reaches the value needed.In like manner, when exporting electric current and needing to diminish, toward phase
Opposite direction adjusts.
Owing to this is fed back to dynamic process, so at the driving force of the second difference amplifier 16 and working power voltage
In the range of, current value accurately can be obtained, and owing to the second difference amplifier 16 works in positive-negative power pattern, so should
Constant-current source both can externally export electric current can also absorb electric current from outside.
Constant pressure source pattern: receive on external equipment by constant source voltage delivery outlet 10, single-chip microcomputer 4 controls single-pole double-throw switch (SPDT)
6 are switched to the first difference amplifier 7 path, and the first switch 8 Guan Bi, second switch 9 turns off, due to the first difference amplifier 7
External circuit is fixed, so amplification is also fixed, single-chip microcomputer 4 has only to receive external input signal and arranges suitable DAC and turn
Change the output voltage of unit module 5, just can obtain output voltage accurately.Thus reach the function of controllable constant potential source.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of the spirit or essential attributes of the present invention, it is possible to realize the present invention in other specific forms.Therefore, no matter
From the point of view of which point, all should regard embodiment as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all by fall in the implication of equivalency and scope of claim
Change is included in the present invention.Should not be considered as limiting involved claim by any reference in claim.
Although moreover, it will be appreciated that this specification is been described by according to embodiment, but the most each embodiment only wraps
Containing an independent technical scheme, this narrating mode of description is only that for clarity sake those skilled in the art should
Description can also be formed those skilled in the art through appropriately combined as an entirety, the technical scheme in each embodiment
May be appreciated other embodiments.
Claims (4)
1. a small power DC power supply able to programme, it is characterised in that this DC source includes:
Power module, it is inputted power supply (1) by outside, linear power supply (2), electric charge pump (3) are constituted, described linear power supply
(2) being produced direct-flow positive voltage by described outside input power supply (1), described electric charge pump (3) is by described outside input power supply electricity
Source (1) produces negative DC voltage, described power module be the power pin of following each difference amplifier power to produce positive and negative directly
Stream voltage output；
Microcontroller (4), this microcontroller (4) include AD conversion unit module (15), D/A conversion unit module (5) and if
Dry I/O mouth, described microcontroller (4) is electrically connected with external control mouth (14) by described I/O mouth；
First difference amplifier (7)；Second difference amplifier (16)；3rd difference amplifier (17)；Single-pole double-throw switch (SPDT) (6)；
First switch (8)；Second switch (9)；Sampling resistor (12)；Adder (13)；
Described DC source is programmed when being configured to constant pressure source output, and constant voltage power supply circuit includes that described microcontroller (4), hilted broadsword are double
Throw switch (6), the first difference amplifier (7) and the first switch (8), described first difference amplifier (7) is double by described hilted broadsword
Throw switch (6) is connected to the D/A conversion unit module (5) of described microcontroller (4), described first difference amplifier (7) defeated
Go out end and be connected to constant source voltage delivery outlet (10) by the first switch (8), and by constant source voltage delivery outlet (10) with outer
Boundary's circuit is connected；
Described DC source is programmed when being configured to constant-current source output, and constant-current source circuit includes that described microcontroller (4), hilted broadsword are double
Throw switch (6), the second difference amplifier (16), sampling resistor (12), the 3rd difference amplifier (17), adder (13) and second
Switch (9), described second difference amplifier (16) is connected to described microcontroller (4) by described single-pole double-throw switch (SPDT) (6)
D/A conversion unit module (5), the outfan of described second difference amplifier (16) is connected to the one of described sampling resistor (12)
End, two differential input ends of the 3rd difference amplifier (17) are coupled with the two ends of described sampling resistor (12), and the described 3rd
Difference amplifier (17) is connected to the AD conversion unit module (15) of described microcontroller (4) by described adder (13),
The other end of described sampling resistor (12) connects constant-current source electric current delivery outlet (11), and by constant-current source electric current delivery outlet (11) with
External circuitry is connected.
Described microcontroller (4) is single-chip microcomputer or DSP.
Described linear power supply (2) by outside input power supply (1) power supply produce+9V direct-flow positive voltage, described electric charge pump (3) by
Outside input power supply (1) power supply produces-9V negative DC voltage.
Small power DC power supply able to programme the most as claimed in claim 1, it is characterised in that: first, second and third described difference is put
Big device (7,16,17) model is SGM8425.
Small power DC power supply able to programme the most as claimed in claim 1, it is characterised in that: described sampling resistor (12) is 5
Ohm.
4. a collocation method for the small power DC power supply able to programme as according to any one of claim 1-3, its feature exists
In: when described DC source is configured to the output of constant-current source pattern, programmable constant-current source output is received on external equipment, described
Single-chip microcomputer (4) by described I/O mouth control described single-pole double-throw switch (SPDT) (6) be switched to described second difference amplifier (16) this
Direction, the most described second switch (9) closes, and when needs export a certain current value, is led to by described external control mouth (14)
Knowing that single-chip microcomputer (4) is presently required how much current, externally output still absorbs electric current from outside；Described single-chip microcomputer (4) is by built-in
Described D/A conversion unit module (5) adjust output voltage, thus affect described second difference amplifier (16) output electricity
Pressure, current value is transformed into magnitude of voltage by described sampling resistor (12), and magnitude of voltage is amplified to by described 3rd difference amplifier (17)
Suitable size, described adder (13) is by the output of the 3rd difference amplifier (17) plus positive bias voltage, and it is described 3rd poor to make
The negative voltage dividing amplifier (17) to export is changed into the AD conversion unit module (15) of described single-chip microcomputer (4) and can detect
Positive voltage for detection, if single-chip microcomputer (4) detects that voltage is less than normal, corresponding externally output electric current is less than normal, then incrementally increase
The output voltage of described D/A conversion unit module (5), thus improve the output voltage values of described second difference amplifier (16)
Until output electric current reaches the value needed.In like manner, when exporting electric current and needing to diminish, adjust toward rightabout.
Owing to this is fed back to dynamic process, so driving force and working power described second difference amplifier (16) are electric
In the range of pressure, current value accurately can be obtained, and owing to described second difference amplifier (16) works in positive-negative power mould
Formula, so this constant-current source both can externally export electric current and can also absorb electric current from outside.
When described DC source is configured to the output of constant pressure source pattern, constant source voltage delivery outlet (10) is received external equipment
On, described single-chip microcomputer (4) controls described single-pole double-throw switch (SPDT) (6) and is switched to described this direction of first difference amplifier (7), institute
Stating the first switch (8) Guan Bi, described second switch (9) turns off, owing to the external circuit of described first difference amplifier (7) is solid
Fixed, so amplification is also fixed, described single-chip microcomputer (4) has only to receive external input signal and arranges suitable digital-to-analogue conversion list
The output voltage of element module (5), just can obtain output voltage accurately；Thus reach to configure the function of controllable constant potential source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610704187.2A CN106100292B (en) | 2016-08-22 | 2016-08-22 | A kind of programmable small power DC power supply and power configuration method |
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| CN201610704187.2A CN106100292B (en) | 2016-08-22 | 2016-08-22 | A kind of programmable small power DC power supply and power configuration method |
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| CN106100292A true CN106100292A (en) | 2016-11-09 |
| CN106100292B CN106100292B (en) | 2018-11-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108390561A (en) * | 2018-03-06 | 2018-08-10 | 安徽卓越动力科技有限公司 | A kind of DC/DC DCPS digitally controlled power sources design |
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| CN106100292B (en) | 2018-11-13 |
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Denomination of invention: A programmable low power DC power supply and its configuration method Effective date of registration: 20220628 Granted publication date: 20181113 Pledgee: Fengxian Branch of Shanghai Rural Commercial Bank Co.,Ltd. Pledgor: SHANGHAI E-PLANET ELECTRONIC TECHNOLOGY CO.,LTD. Registration number: Y2022310000095 |