CN106849641A - A kind of mu balanced circuit - Google Patents
A kind of mu balanced circuit Download PDFInfo
- Publication number
- CN106849641A CN106849641A CN201710164927.2A CN201710164927A CN106849641A CN 106849641 A CN106849641 A CN 106849641A CN 201710164927 A CN201710164927 A CN 201710164927A CN 106849641 A CN106849641 A CN 106849641A
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- Prior art keywords
- voltage
- resistance
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- electrically connected
- monitored
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Classifications
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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
- 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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
-
- 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)
- Networks Using Active Elements (AREA)
Abstract
The invention discloses a kind of mu balanced circuit, including TL431, photoelectrical coupler, control signal input source, monitored signal source output, the control signal input source is connected with TL431, the K ends of the TL431 are electrically connected with photoelectrical coupler, R ends are electrically connected with monitored signal source output, A ends connect earth terminal, and the TL431 determines whether K ends and A ends turn on according to the magnitude of voltage at R ends, and K ends and the conducting of A ends make the output voltage of the monitored signal source output of photoelectrical coupler job control.Through the above way, TL431 mu balanced circuits of the present invention, be controlled using two kinds of entirely different and independent power supplys and solve chip two groups of voltage signals do not interfere with each other in use, it is achieved thereby that can independent control High voltage output power supply voltage stabilizing loop circuit.
Description
Technical field
The present invention relates to mu balanced circuit field, more particularly to a kind of TL431 mu balanced circuits.
Background technology
The power supply that current existing use TL431 carries out output voltage control substantially belongs to directly use the allusion quotation of TL431
Type recommends circuit, and the mode for employing same control source is controlled work, that is to say, that chip internal be triggered after it is defeated
The voltage signal that goes out and monitored voltage signal are same voltage signals, this mode not by the input source of signal and
The monitoring voltage input of signal is separated, and input voltage cannot exceed 36V for this voltage stabilizing chips of TL431, because signal
Source comes from same port, and the voltage at signal monitoring end is also limit by this way, so limits the use of TL431
Scope cannot be used in occasion of the output voltage more than 36V.
The content of the invention
The present invention solves the technical problem of a kind of TL431 mu balanced circuits are provided, can be input into by two kinds completely
Different and independent power supplys is controlled and solves chip two groups of voltage signals do not interfere with each other in use, so as to realize
Can independent control High voltage output power supply voltage stabilizing loop circuit.
In order to solve the above technical problems, one aspect of the present invention is：A kind of TL431 mu balanced circuits are provided,
Including TL431, photoelectrical coupler, control signal input source, monitored signal source output, the control signal input source with
TL431 is connected, and K ends and the photoelectrical coupler of the TL431 are electrically connected with, and R ends are electrically connected with monitored signal source output,
A ends connect earth terminal, and the TL431 determines whether K ends and A ends turn on according to the magnitude of voltage at R ends, and K ends and the conducting of A ends make photoelectricity
The output voltage of the monitored signal source output of coupler job control.
In a preferred embodiment of the present invention, the voltage of the monitored signal source output is more than 36V.
In a preferred embodiment of the present invention, the control signal input source is electrically connected with the K ends of TL431, described
Photoelectrical coupler is electrically connected between control signal input source and TL431, and the TL431 makes K according to the magnitude of voltage size at R ends
End and A terminations are logical makes photoelectrical coupler energization work, according to photoelectrical coupler brightness adjusting the defeated of monitored signal source output
Go out voltage.
In a preferred embodiment of the present invention, first resistor and the second electricity are in series with the monitored signal source output
Resistance carries out partial pressure to monitored signal, and the R ends of the TL431 are electrically connected between first resistor and second resistance, according to the
Magnitude of voltage between one resistance and second resistance determines whether to turn at K ends and A ends.
In a preferred embodiment of the present invention, the voltage at the R ends turns on K ends and A ends more than 2.5V, is less than
2.5V disconnects K ends and A ends, and K ends and A ends pass to the monitored signal source output output of control photoelectrical coupler job control
Burning voltage.
In a preferred embodiment of the present invention, the PM Serial regulations being also electrically connected with including triode and with triode
Signal source, described triode one end is electrically connected at the K ends of TK431, and the other end is connected with reality with monitored signal source output
When adjustment output voltage height.
In a preferred embodiment of the present invention, power supply signal of the control signal input source input voltage less than 36V.
In a preferred embodiment of the present invention, 3rd resistor, the 4th electricity are in series with the monitored signal source output
Resistance and the 5th resistance carry out partial pressure to monitored signal, the R ends of the TL431 be electrically connected at the 4th resistance and the 5th resistance it
Between, determining whether K ends and A ends lead according to the voltage value changes between the 4th resistance and the 5th resistance, K ends and A ends turn on to control
The monitored signal source output output burning voltage of photoelectrical coupler job control processed.
In a preferred embodiment of the present invention, the control signal input source is electrically connected with the R ends of TL431, gives
One, the R ends voltage signal of TL431, makes TL431 adjustment circuit output currents.
In a preferred embodiment of the present invention, the signal input sources processed include input resistance, input capacitance and two poles
Pipe, the input resistance and Diode series, and the R ends of TL431 are electrically connected to, described input capacitance one end is electrically connected at
Between input resistance and diode, other end ground connection, the signal input sources processed export the voltage signal of 2.5V to the R of TL431
End.
In a preferred embodiment of the present invention, it is electrically connected with for reducing noise signal on the photoelectrical coupler
Electric capacity.
The beneficial effects of the invention are as follows：TL431 mu balanced circuits of the present invention, can be input into entirely different and only by two kinds
Vertical power supply is controlled and solves chip two groups of voltage signals do not interfere with each other in use, it is achieved thereby that can independently control
The power supply voltage stabilizing loop circuit of High voltage output processed.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing, wherein：
Fig. 1 is the structural representation of TL431 mu balanced circuits one of the present invention preferred embodiment；
Fig. 2 is the structural representation of another preferred embodiment of TL431 mu balanced circuits shown in Fig. 1；
Fig. 3 is the partial structural diagram of TL431 mu balanced circuits shown in Fig. 2；
The mark of each part is as follows in accompanying drawing：1st, TL431,2, photoelectrical coupler, 3, control signal input source, 4, monitored output
Signal source, 5, first resistor, 6, second resistance, 7, triode, 8, PM Serial regulation signal sources, 1 ', TL431,2 ', light thermocouple
Clutch, 3 ', control signal input source, 4 ', monitored signal source output, 5 ', 3rd resistor, the 6 ', the 4th resistance, the 7 ', the 5th
Resistance, 8 ', input resistance, 9 ', input capacitance, 10 ', diode, 11 ', electric capacity.
Specific embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
Embodiment 1, refers to Fig. 1, a kind of mu balanced circuit, including TL431 1, photoelectrical coupler 2, control signal input source
3rd, be monitored signal source output 4, and control signal input source 3 is connected with TL431 1, K ends and the photoelectrical coupler 2 of TL431 1
It is electrically connected with, R ends are electrically connected with monitored signal source output 3, A ends connection earth terminal, magnitudes of voltage of the TL431 1 according to R ends
Determine whether K ends and A ends turn on, K ends and the conducting of A ends make the output of the monitored signal source output 3 of the job control of photoelectrical coupler 2
Voltage.The voltage of monitored signal source output 4 is more than 36V.Power supply signal of the input voltage of control signal input source 3 less than 36V.
Control signal input source 3 is electrically connected with the K ends of TL431 1, and it is defeated that photoelectrical coupler 2 is electrically connected at control signal
Enter between source 3 and TL431 1, TL431 1 leads to K ends and A terminations according to the magnitude of voltage size at R ends makes photoelectrical coupler 2 be powered
Work, according to the brightness of photoelectrical coupler 2 adjusting the output voltage of monitored signal source output 4.The K ends and A ends of TL431 1 are led
After logical, make conducting between 1 jiao of photoelectrical coupler 2 and 2 jiaos make photoelectrical coupler shinny, 3 jiaos of photoelectrical coupler 2 and 4 jiaos it
Between conduction amount according to the brightness of photoelectrical coupler determine.
Being in series with 6 pairs of monitored signals of first resistor 5 and second resistance on monitored signal source output 4 carries out partial pressure,
The R ends of TL431 1 are electrically connected between first resistor 5 and second resistance 6, according between first resistor 5 and second resistance 6
Magnitude of voltage determines whether to turn at K ends and A ends.The voltage at R ends turns on K ends and A ends more than 2.5V, less than 2.5V make K ends and
A ends disconnect, and K ends and A ends turn on to control the monitored signal source output output burning voltage of the job control of photoelectrical coupler 2.
Also include triode 7 and the PM Serial regulations signal source 8 being electrically connected with triode 7, the one end of triode 7 is electrical
The K ends of TK431 1 are connected to, the other end is connected with the height of real-time adjustment output voltage with monitored signal source output 4, complete
Linear adjustment, while also there is soft start.
By the control signal input source 3 of TL431（12V）With monitored signal source output 4（OUT）Separately, do so is good
Place is exactly that two signals do not interfere with each other, and allows the input voltage of TL431 1 can to utilize low-tension supply signal.Monitored output
Signal source 4 is OUT, is also the R ports of TL431 1, and reference voltage is 2.5V, and we are using simplest electric resistance partial pressure
Mode, is also the tandem circuit of TL431, and partial pressure calculates first resistor 5 and second resistance 6 according to known output voltage signal
Value, working characteristics and principle further according to TL431 1 realize final loop voltage stabilizing, high so as to obtain a stability, essence
Degree output voltage high.
Embodiment 2, refering to Fig. 2 to Fig. 3, a kind of TL431 mu balanced circuits, including TL431 1 ', photoelectrical coupler 2 ', control
Signal input sources 3 ', monitored signal source output 4 ', control signal input source are connected with TL431, the K ends of TL431 1 ' and light
Electric coupler 2 ' is electrically connected with, and R ends are electrically connected with monitored signal source output 4 ', A ends connection earth terminal, the bases of TL431 1 '
The magnitude of voltage at R ends determines whether K ends and A ends turn on, and K ends and the conducting of A ends make the monitored output of the job control of photoelectrical coupler 2 '
The output voltage of signal source 4 '.
The voltage of monitored signal source output 4 ' is more than 36V.Be in series with monitored signal source output 4 ' 3rd resistor 5 ',
4th resistance 6 ' and the 5th resistance 7 ' carry out partial pressure to monitored signal, and the R ends of TL431 1 ' are electrically connected at the 4th resistance 6 '
And the 5th between resistance 7 ', determine whether are K ends and A ends according to the voltage value changes between the 4th resistance 6 ' and the 5th resistance 7 '
Lead, K ends and A ends turn on to control the monitored output of the signal source output 4 ' burning voltage of the job control of photoelectrical coupler 2 '.
Control signal input source 3 ' is electrically connected with the R ends of TL431 1 ', gives one, the R ends voltage letter of TL431 1 '
Number, make the size of the adjustment circuit output currents of TL431 1 '.
Control signal input source 3 ' includes input resistance 8 ', input capacitance 9 ' and diode 10 ', input resistance 8 ' and two poles
Pipe 10 ' is connected, and is electrically connected to the R ends of TL431 1 ', and 9 ' input capacitance one end are electrically connected at input resistance 8 ' and two poles
Between pipe 10 ', other end ground connection, the voltage signal of the output of control signal input source 3 ' 2.5V is to the R ends of TL431 1 '.Light thermocouple
The electric capacity 11 ' for reducing noise signal is electrically connected with clutch 2 ' so that the relatively reliable stabilization of circuit work.
The R ends a reference source voltage of TL431 1 ' is generally 2.5V or so, so being needed the R ends of TL431 1 ' in application
Voltage is set in 2.5V by way of electric resistance partial pressure,（The output voltage for such as designing needs by partial pressure electricity when being 120VDC
120VDC voltages are set in 2.5V at the R ends for being connected to TL431 by resistance by way of electric resistance partial pressure,）Reference voltage is set
Afterwards, the R terminal voltages of TL431 1 ' are also changing when output voltage is in change, and now TL431 1 ' is according to itself R end
Conducting of the voltage change to adjust K ends to the A ends of TL431 1 ' whether control the interior light emitting diodes of photoelectrical coupler 2 '
Whether work by signal transmission to insulating power supply primary side device, and adjust insulating power supply primary side signal control primary side chip
Working condition, so as to reach the purpose of output voltage stabilizing.
Prior art is different from, TL431 mu balanced circuits of the present invention can be input into entirely different and independent by two kinds
Power supply is controlled and solves chip two groups of voltage signals do not interfere with each other in use, it is achieved thereby that can independent control it is high
Press the power supply voltage stabilizing loop circuit of output.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
Equivalent structure or equivalent flow conversion that bright description is made, or directly or indirectly it is used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (12)
1. a kind of mu balanced circuit, it is characterised in that including TL431, photoelectrical coupler, control signal input source, monitored output
Signal source, the control signal input source is connected with TL431, and K ends and the photoelectrical coupler of the TL431 are electrically connected with, R ends
It is electrically connected with monitored signal source output, A ends connection earth terminal, the TL431 determines K ends and A ends according to the magnitude of voltage at R ends
Whether turn on, K ends and the conducting of A ends make the output voltage of the monitored signal source output of photoelectrical coupler job control.
2. mu balanced circuit according to claim 1, it is characterised in that the voltage of the monitored signal source output is more than
36V。
3. mu balanced circuit according to claim 2, it is characterised in that the K ends electricity of the control signal input source and TL431
Property connection, the photoelectrical coupler is electrically connected between control signal input source and TL431, electricity of the TL431 according to R ends
Pressure value size makes K ends and A terminations are logical makes photoelectrical coupler energization work, according to photoelectrical coupler brightness adjusting monitored output
The output voltage of signal source.
4. mu balanced circuit according to claim 3, it is characterised in that be in series with first on the monitored signal source output
Resistance and second resistance carry out partial pressure to monitored signal, and the R ends of the TL431 are electrically connected at first resistor and second resistance
Between, determined whether to turn at K ends and A ends according to the magnitude of voltage between first resistor and second resistance.
5. mu balanced circuit according to claim 4, it is characterised in that the voltage at the R ends makes K ends and A ends more than 2.5V
Conducting, K ends and A ends are disconnected less than 2.5V, and photoelectrical coupler job control is monitored to export letter to control for K ends and the conducting of A ends
Number source output burning voltage.
6. TL431 mu balanced circuits according to claim 5, it is characterised in that also including triode and with triode electricity
Property connection PM Serial regulation signal sources, described triode one end is electrically connected at the K ends of TK431, and the other end is defeated with monitored
Go out signal source to be connected with the height of real-time adjustment output voltage.
7. mu balanced circuit according to claim 6, it is characterised in that the control signal input source input voltage is less than
The power supply signal of 36V.
8. mu balanced circuit according to claim 7, it is characterised in that the control signal input source input voltage is 12V
Power supply signal.
9. mu balanced circuit according to claim 2, it is characterised in that be in series with the 3rd on the monitored signal source output
Resistance, the 4th resistance and the 5th resistance carry out partial pressure to monitored signal, and the R ends of the TL431 are electrically connected at the 4th resistance
And the 5th between resistance, determine whether K ends and A ends turn on according to the voltage value changes between the 4th resistance and the 5th resistance, K ends
Turn on to control the monitored signal source output output burning voltage of photoelectrical coupler job control with A ends.
10. mu balanced circuit according to claim 9, it is characterised in that the R ends of the control signal input source and TL431
It is electrically connected with, gives one, the R ends voltage signal of TL431, makes TL431 adjustment circuit output currents.
11. mu balanced circuits according to claim 10, it is characterised in that the control signal input source includes input electricity
Resistance, input capacitance and diode, the input resistance and Diode series, and it is electrically connected to the R ends of TL431, the input
Electric capacity one end is electrically connected between input resistance and diode, and other end ground connection, the control signal input source exports 2.5V
Voltage signal to the R ends of TL431.
12. mu balanced circuits according to claim 11, it is characterised in that be electrically connected with the photoelectrical coupler for
Reduce the electric capacity of noise signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164927.2A CN106849641A (en) | 2017-03-20 | 2017-03-20 | A kind of mu balanced circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710164927.2A CN106849641A (en) | 2017-03-20 | 2017-03-20 | A kind of mu balanced circuit |
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| Publication Number | Publication Date |
|---|---|
| CN106849641A true CN106849641A (en) | 2017-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710164927.2A Pending CN106849641A (en) | 2017-03-20 | 2017-03-20 | A kind of mu balanced circuit |
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| CN (1) | CN106849641A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110855127A (en) * | 2019-11-27 | 2020-02-28 | 常州格力博有限公司 | Feedback control circuit, charger and switching power supply |
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| US20070211503A1 (en) * | 2006-03-07 | 2007-09-13 | Manabu Oyama | Charge-pump type switching power supply apparatus |
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Application publication date: 20170613 |