CN104079053B - Charger feedback circuit - Google Patents
Charger feedback circuit Download PDFInfo
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- CN104079053B CN104079053B CN201310110211.6A CN201310110211A CN104079053B CN 104079053 B CN104079053 B CN 104079053B CN 201310110211 A CN201310110211 A CN 201310110211A CN 104079053 B CN104079053 B CN 104079053B
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Abstract
The invention discloses a kind of charger feedback circuit, it includes power input, the first current rectifying and wave filtering circuit, control circuit, transforming circuit, the second current rectifying and wave filtering circuit, charging output, photoelectrical coupler, the first mu balanced circuit, operational amplifier, the second mu balanced circuit and bleeder circuit；Power input and the first current rectifying and wave filtering circuit connect；First current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively；Control circuit is connected with photoelectrical coupler, transforming circuit respectively；Transforming circuit and the second current rectifying and wave filtering circuit connect；The cathode output end of the second current rectifying and wave filtering circuit inputs positive pole respectively with the optocoupler of photoelectrical coupler, the input of the first mu balanced circuit, the power end of operational amplifier, the input of bleeder circuit, the positive pole of charging output are connected；Charging output, for connecting the battery of outside, is charged.
Description
Technical field
The present invention relates to charger, in particular, a kind of charger feedback circuit.
Background technology
In emergent electrical equipment, charger is requisite electrical accessorie, electricity when market there will be charging often
Explode or burn out the accident generation of electronic product in pond, so the good and bad work directly determining electronic product of charger
Make performance even product safety performance.Existing market charger quality is uneven, causes mobile phone or computer etc.
The thing side of electrical equipment battery explosion happens occasionally.
Therefore, prior art existing defects, need to improve.
Summary of the invention
The technical problem to be solved is to provide a kind of novel charger feedback circuit.
Technical scheme is as follows: a kind of charger feedback circuit, it include power input, first
Current rectifying and wave filtering circuit, control circuit, transforming circuit, the second current rectifying and wave filtering circuit, charging output, photoelectricity
Coupler, the first mu balanced circuit, operational amplifier, the second mu balanced circuit and bleeder circuit；Power supply inputs
End is connected with the first current rectifying and wave filtering circuit, is used for inputting civil power, is transferred to the first current rectifying and wave filtering circuit；First
Current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively, for civil power is carried out rectifying and wave-filtering, point
Supplementary biography is passed to control circuit and transforming circuit；Control circuit is connected with photoelectrical coupler, transforming circuit respectively,
For the feedback information according to photoelectrical coupler, adjust the output electric current of transforming circuit；Transforming circuit and second
Current rectifying and wave filtering circuit connects, and for being depressured by civil power, is transferred to the second current rectifying and wave filtering circuit；Second rectification filter
The cathode output end of wave circuit inputs positive pole, the input of the first mu balanced circuit with the optocoupler of photoelectrical coupler respectively
End, the power end of operational amplifier, the input of bleeder circuit, the positive pole of charging output connect；Second
The cathode output end of current rectifying and wave filtering circuit connects signal ground；The negative input of operational amplifier, charging output
Negative pole altogether signal ground；Charging output, for connecting the battery of outside, is charged；First mu balanced circuit
The electrode input end of output concatenation operation amplifier；Second mu balanced circuit is the second three-terminal voltage regulator；
The output of operational amplifier inputs negative pole, the second three-terminal voltage regulator with the optocoupler of photoelectrical coupler respectively
Negative electrode connect；The reference pole of the second three-terminal voltage regulator, anode, the earth terminal of operational amplifier, with
And the output of bleeder circuit, dividing point signal ground altogether.
Preferably, in described charger feedback circuit, described first current rectifying and wave filtering circuit includes by four two poles
The electric bridge of pipe composition and the first electric capacity C1；Transforming circuit includes transformer T1；First output termination of electric bridge
Power supply ground, the second output connects power supply ground by the first electric capacity C1 and connects control by the first resistance R1
Circuit and the first input end of connection transformer T1；The second of control circuit connection transformer T1 respectively
Input, adjustable input；First output of transformer T1 connects the positive pole of the 5th diode D5；Fortune
Calculate the negative input of amplifier, the negative pole of charging output connects one end of the 3rd resistance R3 jointly, and the 3rd
The other end of resistance R3 is total to signal ground with second output of transformer T1；Bleeder circuit includes the of series connection
Seven resistance R7 and the 8th resistance R8；The power end of the negative pole concatenation operation amplifier of the 5th diode D5 and
Connect the optocoupler input positive pole of photoelectrical coupler by the 4th resistance R4 and connect the by the second resistance R2
The input of one mu balanced circuit is also connected with one end, the positive pole of charging output of the 7th resistance R7 respectively,
Signal ground is connect also by the second electric capacity C2；The other end of the 7th resistance R7, respectively with the 8th resistance R8's
One end, the other end of the 8th resistance R8, the earth terminal of operational amplifier, the ginseng of the second three-terminal voltage regulator
Examine the anode signal ground altogether of pole, the second three-terminal voltage regulator；First output of photoelectrical coupler connects control
Circuit processed, the second output termination power ground.
Preferably, in described charger feedback circuit, the negative pole of the 5th diode D5 connects the 6th diode
The positive pole of D6, the negative pole of the 6th diode D6 connects the positive pole of charging output.
Preferably, in described charger feedback circuit, the negative pole connecting luminous diode of the 6th diode D6
Positive pole, the negative pole of light emitting diode connects the positive pole of charging output.
Preferably, in described charger feedback circuit, the output of operational amplifier connects the 7th diode
Negative pole, the positive pole of the 7th diode is respectively with the optocoupler of photoelectrical coupler input negative pole, the two or three end is adjustable surely
The negative electrode of depressor connects.
Preferably, described charger feedback circuit also includes a fuse, and it is arranged at power input and
Between one current rectifying and wave filtering circuit.
Preferably, in described charger feedback circuit, described fuse be arranged at the positive pole of power input with
Between first current rectifying and wave filtering circuit.
Preferably, in described charger feedback circuit, the power input of described control circuit connects the first electricity
Resistance R1, earth terminal ground connection, input connect the first output of photoelectrical coupler, output connection transformer
Second input of T1, the adjustable input of adjustment end connection transformer T1.
Preferably, in described charger feedback circuit, described transformer T1 is switch transformer.
Preferably, in described charger feedback circuit, the first mu balanced circuit include the first three-terminal voltage regulator,
5th resistance R5 and the 6th resistance R6；The negative electrode of the first three-terminal voltage regulator and reference pole and the 5th
One end of resistance R5 connects, as the input of the first mu balanced circuit；The other end of the 5th resistance R5 is respectively
It is connected with one end, the electrode input end of operational amplifier of the 6th resistance R6；First three-terminal voltage regulator
The other end of anode and the 6th resistance R6 signal ground altogether.
Using such scheme, the present invention is by providing battery charger feedback control circuit device, when battery fills
During electricity, battery status is monitored in real time feedback, and then adjusts the feedback control circuit of charging current, it is to avoid
Over-charging of battery burns out generation property or safety problem；Thus solve the deficiency of charging circuit feedback fraction, carry
High charging efficiency and charging security, reduce the generation of charging accident, and improving charging circuit entirety can
By property.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of one embodiment of the present of invention；
Fig. 2 is the schematic diagram of another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As it is shown in figure 1, one embodiment of the present of invention is, a kind of charger feedback circuit, it includes power supply
Input, the first current rectifying and wave filtering circuit, control circuit, transforming circuit, the second current rectifying and wave filtering circuit, charging
Output, photoelectrical coupler, the first mu balanced circuit, operational amplifier, the second mu balanced circuit and dividing potential drop electricity
Road.
Power input and the first current rectifying and wave filtering circuit connect, and are used for inputting civil power, are transferred to the first rectification filter
Wave circuit；Such as, power input is a two-pin plug.Preferably, also including a fuse, it is arranged
Between power input and the first current rectifying and wave filtering circuit.Preferably, described fuse is arranged at power supply input
Between positive pole and first current rectifying and wave filtering circuit of end.
First current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively, for civil power is carried out rectification
Filtering, is respectively transmitted to control circuit and transforming circuit；Preferably, the first current rectifying and wave filtering circuit is that bridge-type is whole
Current circuit and the combination of filter circuit.
Control circuit is connected with photoelectrical coupler, transforming circuit respectively, for the feedback according to photoelectrical coupler
Information, adjusts the output electric current of transforming circuit；When the rechargeable battery charged when outside is almost full of,
Photoelectrical coupler feedback signal, control circuit automatically adjust transforming circuit reduce charging current, when outside
When the rechargeable battery of charging is full of, photoelectrical coupler feedback signal, control circuit adjusts transforming circuit drop and fills
Electricity electric current.
Transforming circuit and the second current rectifying and wave filtering circuit connect, and for being depressured by civil power, are transferred to the second rectification filter
Wave circuit；The controlled circuit of transforming circuit automatically controls.
The cathode output end of the second current rectifying and wave filtering circuit input with the optocoupler of photoelectrical coupler respectively positive pole, first
The input of mu balanced circuit, the power end of operational amplifier, the input of bleeder circuit, charging output
Positive pole connects；The cathode output end of the second current rectifying and wave filtering circuit connects signal ground.
The negative input of operational amplifier, the negative pole signal ground altogether of charging output.
Charging output, for connecting the battery of outside, is charged；Such as, hand is inserted by adaptive plug
Machine or other-end, charge for it；And for example, charging output induction coil is set, be used for sensing with
When outside battery establishes connection, automatically begin to charging.
The electrode input end of the output concatenation operation amplifier of the first mu balanced circuit；Second mu balanced circuit is
Two three-terminal voltage regulators；The output of operational amplifier input with the optocoupler of photoelectrical coupler respectively negative pole,
The negative electrode of the second three-terminal voltage regulator connects；The reference pole of the second three-terminal voltage regulator, anode, computing
The earth terminal of amplifier, and the output of bleeder circuit, dividing point signal ground altogether.Such as, three ends are adjustable
Voltage-stablizer is LM431 or TL431 etc..
Preferably, as in figure 2 it is shown, an example is, described first current rectifying and wave filtering circuit includes by four two
The electric bridge of pole pipe composition and the first electric capacity C1.
Transforming circuit includes transformer T1；Preferably, described transformer T1 is switch transformer；Such as its
It is controlled automatically by control circuit, automatically opens up or close series switch.
As in figure 2 it is shown, the first output termination power ground of electric bridge, the second output is connect by the first electric capacity C1
Power supply ground also inputs by the first of the first resistance R1 connection control circuit Z1 and connection transformer T1
End；Such as, the first input end of electric bridge connects the positive pole of power input, the second input termination power of electric bridge
The negative pole of input.Preferably, between positive pole and the first input end of electric bridge of power input, a guarantor is set
Danger silk F1.
Control circuit Z1 second input of connection transformer T1, adjustable input respectively；Such as, control
Circuit is a microprocessor or microcontroller.
First output of transformer T1 connects the positive pole of the 5th diode D5；The second of transformer T1 is defeated
Go out end and connect signal ground.
The negative input of operational amplifier, the negative pole of charging output connect one end of the 3rd resistance R3 jointly,
The other end of the 3rd resistance R3 and second output of transformer T1 signal ground altogether.It should be noted that this
Invention and each embodiment thereof, the specification for resistance, electric capacity, diode etc. is not restricted, and only needs it can
Realize the effect of charging feedback and control.
Bleeder circuit includes the 7th resistance R7 and the 8th resistance R8 of series connection；Or, it is also possible to connect one again
The resistance of high value.
The power end of the negative pole concatenation operation amplifier of the 5th diode D5 is also connected by the 4th resistance R4
Photoelectrical coupler optocoupler input positive pole and by the second resistance R2 connect the first mu balanced circuit input,
And be connected with one end, the positive pole of charging output of the 7th resistance R7 respectively, connect also by the second electric capacity C2
Signal ground；The other end of the 7th resistance R7, respectively with one end of the 8th resistance R8, the 8th resistance R8
The other end, the earth terminal of operational amplifier, the reference pole of the second three-terminal voltage regulator, the two or three end is adjustable
The anode of voltage-stablizer signal ground altogether；First output of photoelectrical coupler connects control circuit, the second output
Connect power supply ground.
Preferably, the negative pole of the 5th diode D5 connects the positive pole of the 6th diode D6, the 6th diode D6
Negative pole connect charging output positive pole；Realize further and strengthen rectification effect.Preferably, the 6th 2
The positive pole of the negative pole connecting luminous diode of pole pipe D6, the negative pole of light emitting diode is just connecting charging output
Pole, is used for indicating charged state.
It is conjointly employed in any of the above-described embodiment, it is preferred that the output of operational amplifier connects the seven or two pole
The negative pole of pipe, the positive pole of the 7th diode inputs negative pole respectively with the optocoupler of photoelectrical coupler, the two or three end can
The negative electrode adjusting voltage-stablizer connects.
Preferably, the power input of described control circuit connects the first resistance R1, earth terminal ground connection, input
End connects the first output of photoelectrical coupler, second input of output connection transformer T1, adjusts end
The adjustable input of connection transformer T1.
It is conjointly employed in any of the above-described embodiment, it is preferred that the first mu balanced circuit includes that the one or three end is adjustable surely
Depressor, the 5th resistance R5 and the 6th resistance R6；The negative electrode of the first three-terminal voltage regulator with reference to pole, with
And the 5th resistance R5 one end connect, as the input of the first mu balanced circuit；Another of 5th resistance R5
End is connected with one end, the electrode input end of operational amplifier of the 6th resistance R6 respectively；One or three end is adjustable surely
The anode of depressor and the other end of the 6th resistance R6 signal ground altogether.
Preferably, all components and parts connecing signal ground, unification connects a signal ground, altogether by this signal ground
Ground connection.And/or, all components and parts connecing power supply ground, unification connects a power ground, altogether by this power ground
Ground connection.
Continue with as a example by Fig. 2, illustrate that principle and the realization of the present invention, an embodiment are, such as Fig. 2
Shown in, F1 is fuse, D1～D4, D5, D6 are commutation diode, and C1, C2 are filter capacitor,
R1～R8 is resistance, and yellow box is control circuit part, and T1 is switch transformer, and U1 is optocoupler, U2,
U3 is high-precision voltage stabilizing device 431, and A1 is transport and placing device, and BAT is cell load.Operation principle is as follows: civil power
After powering on, through D1～D4 rectification, C1 filters, and high-tension electricity is delivered to time pole by transformer T1 step-down
Circuit, by D5 rectification, C2 filters, then accesses battery by D6.
When cell voltage is less than full piezoelectric voltage, a point voltage is relatively low, and d point voltage is relatively low, and U3 is not turned on, light
In coupling U1, diode does not has electric current to flow through, and its triode is closed, and control circuit does not has feedback signal, charged electrical
Battery is charged by road always.
When charging current is excessive, R3 both end voltage raises, i.e. b point voltage raises, amplifier output low level,
Electric current flows through from R4, U1, D7, and control circuit obtains exporting the excessive signal of electric current, thus adjusts output electricity
Stream, makes charging current be in stable state, prevents battery from overcurrent heating blast.
Along with the carrying out of charging, cell voltage raises, and a point voltage also raises, and corresponding d point voltage raises, U3
Conducting, optocoupler U1 has electric current to flow through, and control circuit obtains feedback signal and reduces charging current, enters small area analysis
Floating charging state, this floating charge state is safe charging state.
So, it becomes possible to realize and improve charging circuit feedback performance, monitoring cell voltage state prevents in real time
Battery overcharge, improves charging security energy；Further, by monitoring battery charging state in real time, adjustment is filled
Electricity electric current, makes charging more reasonable, more energy efficient.
Further, embodiments of the invention are it is also possible that each technical characteristic of the various embodiments described above, mutually
The charger feedback circuit that combination is formed.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (10)
1. a charger feedback circuit, it is characterised in that include power input, the first rectifying and wave-filtering
Circuit, control circuit, transforming circuit, the second current rectifying and wave filtering circuit, charging output, photoelectrical coupler,
First mu balanced circuit, operational amplifier, the second mu balanced circuit and bleeder circuit；
Power input and the first current rectifying and wave filtering circuit connect, and are used for inputting civil power, are transferred to the first rectification filter
Wave circuit；
First current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively, for civil power is carried out rectification
Filtering, is respectively transmitted to control circuit and transforming circuit；
Control circuit is connected with photoelectrical coupler, transforming circuit respectively, for the feedback according to photoelectrical coupler
Information, adjusts the output electric current of transforming circuit；
Transforming circuit and the second current rectifying and wave filtering circuit connect, and for being depressured by civil power, are transferred to the second rectification filter
Wave circuit；
The cathode output end of the second current rectifying and wave filtering circuit input with the optocoupler of photoelectrical coupler respectively positive pole, first
The input of mu balanced circuit, the power end of operational amplifier, the input of bleeder circuit, charging output
Positive pole connects；
The cathode output end of the second current rectifying and wave filtering circuit connects signal ground；
The negative input of operational amplifier, the negative pole signal ground altogether of charging output；
Charging output, for connecting the battery of outside, is charged；
The electrode input end of the output concatenation operation amplifier of the first mu balanced circuit；
Second mu balanced circuit is the second three-terminal voltage regulator；
The output of operational amplifier is respectively with the optocoupler of photoelectrical coupler input negative pole, the two or three end is adjustable surely
The negative electrode of depressor connects；
The reference pole of the second three-terminal voltage regulator, anode, the earth terminal of operational amplifier, and dividing potential drop electricity
The output on road, dividing point signal ground altogether.
Charger feedback circuit the most according to claim 1, it is characterised in that described first rectification filter
Wave circuit includes electric bridge and the first electric capacity C1 being made up of four diodes；
Transforming circuit includes transformer T1；
First output termination power ground of electric bridge, the second output connects power supply ground by the first electric capacity C1 and leads to
Cross the first resistance R1 and connect control circuit and the first input end of connection transformer T1；
Control circuit second input of connection transformer T1, adjustable input respectively；
First output of transformer T1 connects the positive pole of the 5th diode D5；
The negative input of operational amplifier, the negative pole of charging output connect one end of the 3rd resistance R3 jointly,
The other end of the 3rd resistance R3 and second output of transformer T1 signal ground altogether；
Bleeder circuit includes the 7th resistance R7 and the 8th resistance R8 of series connection；
The power end of the negative pole concatenation operation amplifier of the 5th diode D5 is also connected by the 4th resistance R4
Photoelectrical coupler optocoupler input positive pole and by the second resistance R2 connect the first mu balanced circuit input,
And be connected with one end, the positive pole of charging output of the 7th resistance R7 respectively, connect also by the second electric capacity C2
Signal ground；
The other end of the 7th resistance R7, respectively with one end of the 8th resistance R8, the 8th resistance R8 another
End, the reference pole of the earth terminal of operational amplifier, the second three-terminal voltage regulator, the two or the three adjustable voltage stabilizing of end
The anode of device signal ground altogether；
First output of photoelectrical coupler connects control circuit, the second output termination power ground.
Charger feedback circuit the most according to claim 2, it is characterised in that the 5th diode D5
Negative pole connect the positive pole of the 6th diode D6, the negative pole of the 6th diode D6 is just connecting charging output
Pole.
Charger feedback circuit the most according to claim 3, it is characterised in that the 6th diode D6
The positive pole of negative pole connecting luminous diode, the negative pole of light emitting diode connects the positive pole of charging output.
Charger feedback circuit the most according to claim 3, it is characterised in that operational amplifier defeated
Going out end and connect the negative pole of the 7th diode, the positive pole of the 7th diode inputs with the optocoupler of photoelectrical coupler respectively
Negative pole, the negative electrode of the second three-terminal voltage regulator connect.
Charger feedback circuit the most according to claim 1, it is characterised in that also include a fuse,
It is arranged between power input and the first current rectifying and wave filtering circuit.
Charger feedback circuit the most according to claim 6, it is characterised in that described fuse is arranged
Between power input and the first current rectifying and wave filtering circuit.
Charger feedback circuit the most according to claim 1, it is characterised in that described control circuit
Power input connects the first resistance R1, earth terminal ground connection, the first output of input connection photoelectrical coupler
End, second input of output connection transformer T1, the adjustable input of adjustment end connection transformer T1.
Charger feedback circuit the most according to claim 1, it is characterised in that described transformer T1
For switch transformer.
10. according to the arbitrary described charger feedback circuit of claim 1 to 9, it is characterised in that first is steady
Volt circuit includes the first three-terminal voltage regulator, the 5th resistance R5 and the 6th resistance R6；
The negative electrode of the first three-terminal voltage regulator is connected with the one end with reference to pole and the 5th resistance R5, as
The input of the first mu balanced circuit；
The other end of the 5th resistance R5 inputs with one end of the 6th resistance R6, the positive pole of operational amplifier respectively
End connects；
The anode of the first three-terminal voltage regulator and the other end of the 6th resistance R6 signal ground altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110211.6A CN104079053B (en) | 2013-03-29 | 2013-03-29 | Charger feedback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310110211.6A CN104079053B (en) | 2013-03-29 | 2013-03-29 | Charger feedback circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104079053A CN104079053A (en) | 2014-10-01 |
| CN104079053B true CN104079053B (en) | 2016-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310110211.6A Expired - Fee Related CN104079053B (en) | 2013-03-29 | 2013-03-29 | Charger feedback circuit |
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| Country | Link |
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| CN (1) | CN104079053B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256829A (en) * | 2018-08-13 | 2019-01-22 | 浙江特康电子科技有限公司 | Charger output voltage auto-adjusting circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490742U (en) * | 2009-07-27 | 2010-05-26 | 黎承理 | Charger with charging polarity conversion function |
| CN101917057A (en) * | 2010-08-26 | 2010-12-15 | 江西联创通信有限公司 | Multi-functional serial voltage-stabilizing power supply |
| CN102013721A (en) * | 2009-09-07 | 2011-04-13 | 飞宏科技股份有限公司 | Power supply system for reducing countercurrent |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5519138B2 (en) * | 2008-10-07 | 2014-06-11 | 株式会社マキタ | Charger |
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2013
- 2013-03-29 CN CN201310110211.6A patent/CN104079053B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201490742U (en) * | 2009-07-27 | 2010-05-26 | 黎承理 | Charger with charging polarity conversion function |
| CN102013721A (en) * | 2009-09-07 | 2011-04-13 | 飞宏科技股份有限公司 | Power supply system for reducing countercurrent |
| CN101917057A (en) * | 2010-08-26 | 2010-12-15 | 江西联创通信有限公司 | Multi-functional serial voltage-stabilizing power supply |
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| CN104079053A (en) | 2014-10-01 |
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Granted publication date: 20160907 Termination date: 20190329 |