CN104079053A - Charger feedback circuit - Google Patents
Charger feedback circuit Download PDFInfo
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- CN104079053A CN104079053A CN201310110211.6A CN201310110211A CN104079053A CN 104079053 A CN104079053 A CN 104079053A CN 201310110211 A CN201310110211 A CN 201310110211A CN 104079053 A CN104079053 A CN 104079053A
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Abstract
The invention discloses a charger feedback circuit. The charger feedback circuit comprises a power source input end, a first rectification filter circuit, a control circuit, a voltage transformation circuit, a second rectification filter circuit, a charging output end, a photoelectric coupler, a first voltage stabilizing circuit, an operational amplifier, a second voltage stabilizing circuit and a voltage division circuit. The power source input end is connected with the first rectification filter circuit. The first rectification filter circuit is connected with the control circuit and the voltage transformation circuit. The control circuit is connected with the photoelectric coupler and the voltage division circuit respectively. The voltage transformation circuit is connected with the second rectification filter circuit. The positive output end of the second rectification filter circuit is connected with the optocoupler input positive electrode of the photoelectric coupler, the input end of the first voltage stabilizing circuit, the power source end of the operational amplifier, the input end of the voltage division circuit and the positive electrode of the charging output end. The charging output end is used for being connected with an external battery for charging.
Description
Technical field
The present invention relates to charger, in particular, a kind of charger feedback circuit.
Background technology
In emergent electrical equipment, the charger electrical accessorie that is absolutely necessary, when market there will be charging often, battery explosion or the accident that burns out electronic product occur, so the quality of charger directly determines the even product safety performance of service behaviour of electronic product.Existing market charger quality is uneven, causes the thing side of the electrical equipment such as mobile phone or computer battery explosion to happen occasionally.
Therefore, there is defect in prior art, needs to improve.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of novel charger feedback circuit.
Technical scheme of the present invention is as follows: a kind of charger feedback circuit, and it comprises 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 voltage stabilizing circuit, operational amplifier, the second voltage stabilizing circuit and bleeder circuit; Power input is connected with the first current rectifying and wave filtering circuit, for inputting civil power, is transferred to the first current rectifying and wave filtering circuit; The first current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively, for civil power is carried out to rectifying and wave-filtering, is transferred to respectively control circuit and transforming circuit; Control circuit is connected with photoelectrical coupler, transforming circuit respectively, for according to the feedback information of photoelectrical coupler, adjusts the output current of transforming circuit; Transforming circuit is connected with the second current rectifying and wave filtering circuit, for by civil power step-down, is transferred to the second current rectifying and wave filtering circuit; The cathode output end of the second current rectifying and wave filtering circuit is connected with the optocoupler input positive pole of photoelectrical coupler, the input of the first voltage stabilizing circuit, the power end of operational amplifier, the input of bleeder circuit, the positive pole of charging output respectively; 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 outside battery, charges; The electrode input end of the output concatenation operation amplifier of the first voltage stabilizing circuit; The second voltage stabilizing circuit is the second three-terminal voltage regulator; The output of operational amplifier is connected with the optocoupler input negative pole of photoelectrical coupler, the negative electrode of the second three-terminal voltage regulator respectively; The reference utmost point of the second three-terminal voltage regulator, anode, the earth terminal of operational amplifier, and the output of bleeder circuit, dividing point signal ground altogether.
Preferably, in described charger feedback circuit, described the first current rectifying and wave filtering circuit comprises the electric bridge and the first capacitor C 1 that are made up of four diodes; Transforming circuit comprises transformer T1; The first output termination power ground of electric bridge, the second output connects power supply ground by the first capacitor C 1 and connects the first input end of control circuit and connection transformer T1 by the first resistance R 1; Control circuit is the second input, the adjustable input of connection transformer T1 respectively; The first output of transformer T1 connects the positive pole of the 5th diode D5; The negative input of operational amplifier, common one end that connects the 3rd resistance R 3 of negative pole of charging output, the second output of the other end of the 3rd resistance R 3 and transformer T1 is signal ground altogether; Bleeder circuit comprises the 7th resistance R 7 and the 8th resistance R 8 of series connection; The power end of the negative pole concatenation operation amplifier of the 5th diode D5 is also connected the optocoupler input positive pole of photoelectrical coupler and is connected the input of the first voltage stabilizing circuit, is also connected with one end of the 7th resistance R 7, the positive pole of charging output respectively by the second resistance R 2 by the 4th resistance R 4, also connects signal ground by the second capacitor C 2; The other end of the 7th resistance R 7, respectively with one end of the 8th resistance R 8, the other end of the 8th resistance R 8, the earth terminal of operational amplifier, the reference utmost point of the second three-terminal voltage regulator, the anode signal ground altogether of the second three-terminal voltage regulator; The first output of photoelectrical coupler connects control circuit, the second output termination power ground.
Preferably, in described charger feedback circuit, the negative pole of the 5th diode D5 connects the positive pole of the 6th diode D6, and the negative pole of the 6th diode D6 connects the positive pole of charging output.
Preferably, in described charger feedback circuit, the positive pole of the negative pole connecting luminous diode of the 6th diode D6, 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 negative pole of the 7th diode, and the positive pole of the 7th diode is connected with the optocoupler input negative pole of photoelectrical coupler, the negative electrode of the second three-terminal voltage regulator respectively.
Preferably, described charger feedback circuit also comprises a fuse, and it is arranged between power input and the first current rectifying and wave filtering circuit.
Preferably, in described charger feedback circuit, described fuse is arranged between the positive pole and the first current rectifying and wave filtering circuit of power input.
Preferably, in described charger feedback circuit, the power input of described control circuit connects the first output of the first resistance R 1, earth terminal ground connection, input connection photoelectrical coupler, the second input of output connection transformer 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 voltage stabilizing circuit comprises the first three-terminal voltage regulator, the 5th resistance R 5 and the 6th resistance R 6; The negative electrode of the first three-terminal voltage regulator be connected with reference to one end of the utmost point and the 5th resistance R 5, as the input of the first voltage stabilizing circuit; The other end of the 5th resistance R 5 is connected with one end of the 6th resistance R 6, the electrode input end of operational amplifier respectively; The other end of the anode of the first three-terminal voltage regulator and the 6th resistance R 6 is signal ground altogether.
Adopt such scheme, the present invention is by providing battery charger feedback control circuit device, in the time that battery charges, battery status is carried out to Real-Time Monitoring feedback, and then adjust the feedback control circuit of charging current, avoid over-charging of battery to burn out property or safety problem occur; Thereby the deficiency that has solved charging circuit feedback fraction, has improved charging efficiency and charging security, reduce the generation of charging accident, promote charging circuit global reliability.
Brief description of the drawings
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.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1, one embodiment of the present of invention are, a kind of charger feedback circuit, it comprises 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 voltage stabilizing circuit, operational amplifier, the second voltage stabilizing circuit and bleeder circuit.
Power input is connected with the first current rectifying and wave filtering circuit, for inputting civil power, is transferred to the first current rectifying and wave filtering circuit; For example, power input is a two-pin plug.Preferably, also comprise a fuse, it is arranged between power input and the first current rectifying and wave filtering circuit.Preferably, described fuse is arranged between the positive pole and the first current rectifying and wave filtering circuit of power input.
The first current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively, for civil power is carried out to rectifying and wave-filtering, is transferred to respectively control circuit and transforming circuit; Preferably, the first current rectifying and wave filtering circuit is the combination of bridge rectifier and filter circuit.
Control circuit is connected with photoelectrical coupler, transforming circuit respectively, for according to the feedback information of photoelectrical coupler, adjusts the output current of transforming circuit; When the rechargeable battery charging when outside is almost full of, photoelectrical coupler feedback signal, control circuit is automatically adjusted transforming circuit and is reduced charging current, when the rechargeable battery charging when outside is full of, photoelectrical coupler feedback signal, control circuit is adjusted the transforming circuit charging current of breaking.
Transforming circuit is connected with the second current rectifying and wave filtering circuit, for by civil power step-down, is transferred to the second current rectifying and wave filtering circuit; The controlled circuit of transforming circuit is controlled automatically.
The cathode output end of the second current rectifying and wave filtering circuit is connected with the optocoupler input positive pole of photoelectrical coupler, the input of the first voltage stabilizing circuit, the power end of operational amplifier, the input of bleeder circuit, the positive pole of charging output respectively; 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 outside battery, charges; For example, inserting mobile phone or other-end by adaptive plug, is its charging; And for example, charging output arranges induction coil, has set up while being connected for sensing with outside battery, automatically starts charging.
The electrode input end of the output concatenation operation amplifier of the first voltage stabilizing circuit; The second voltage stabilizing circuit is the second three-terminal voltage regulator; The output of operational amplifier is connected with the optocoupler input negative pole of photoelectrical coupler, the negative electrode of the second three-terminal voltage regulator respectively; The reference utmost point of the second three-terminal voltage regulator, anode, the earth terminal of operational amplifier, and the output of bleeder circuit, dividing point signal ground altogether.For example, three-terminal voltage regulator is LM431 or TL431 etc.
Preferably, as shown in Figure 2, an example is that described the first current rectifying and wave filtering circuit comprises the electric bridge and the first capacitor C 1 that are made up of four diodes.
Transforming circuit comprises transformer T1; Preferably, described transformer T1 is switch transformer; For example it is controlled by control circuit automatically, automatically opens or close series switch.
As shown in Figure 2, the first output termination power ground of electric bridge, the second output connects power supply ground by the first capacitor C 1 and connects the first input end of control circuit Z1 and connection transformer T1 by the first resistance R 1; For example, the first input end of electric bridge connects the positive pole of power input, the negative pole of the second input termination power input of electric bridge.Preferably, a fuse F1 is set between the positive pole of power input and the first input end of electric bridge.
Control circuit Z1 is the second input, the adjustable input of connection transformer T1 respectively; For example, control circuit is a microprocessor or microcontroller.
The first output of transformer T1 connects the positive pole of the 5th diode D5; The second output of transformer T1 connects signal ground.
The negative input of operational amplifier, common one end that connects the 3rd resistance R 3 of negative pole of charging output, the second output of the other end of the 3rd resistance R 3 and transformer T1 is signal ground altogether.It should be noted that, the present invention and each embodiment thereof, be not restricted for the specification of resistance, electric capacity, diode etc., the effect that only needs it can realize charging feedback and control.
Bleeder circuit comprises the 7th resistance R 7 and the 8th resistance R 8 of series connection; Or, the resistance of the high value of can also connecting again.
The power end of the negative pole concatenation operation amplifier of the 5th diode D5 is also connected the optocoupler input positive pole of photoelectrical coupler and is connected the input of the first voltage stabilizing circuit, is also connected with one end of the 7th resistance R 7, the positive pole of charging output respectively by the second resistance R 2 by the 4th resistance R 4, also connects signal ground by the second capacitor C 2; The other end of the 7th resistance R 7, respectively with one end of the 8th resistance R 8, the other end of the 8th resistance R 8, the earth terminal of operational amplifier, the reference utmost point of the second three-terminal voltage regulator, the anode signal ground altogether of the second three-terminal voltage regulator; The first output of photoelectrical coupler connects control circuit, the second output termination power ground.
Preferably, the negative pole of the 5th diode D5 connects the positive pole of the 6th diode D6, and the negative pole of the 6th diode D6 connects the positive pole of charging output; Further realize and strengthen rectification effect.Preferably, the positive pole of the negative pole connecting luminous diode of the 6th diode D6, the negative pole of light-emitting diode connects the positive pole of charging output, is used to indicate charged state.
In conjunction with being applied to above-mentioned arbitrary embodiment, preferred, the output of operational amplifier connects the negative pole of the 7th diode, and the positive pole of the 7th diode is connected with the optocoupler input negative pole of photoelectrical coupler, the negative electrode of the second three-terminal voltage regulator respectively.
Preferably, the power input of described control circuit connects the first output of the first resistance R 1, earth terminal ground connection, input connection photoelectrical coupler, the second input of output connection transformer T1, the adjustable input of adjustment end connection transformer T1.
In conjunction with being applied to above-mentioned arbitrary embodiment, preferred, the first voltage stabilizing circuit comprises the first three-terminal voltage regulator, the 5th resistance R 5 and the 6th resistance R 6; The negative electrode of the first three-terminal voltage regulator be connected with reference to one end of the utmost point and the 5th resistance R 5, as the input of the first voltage stabilizing circuit; The other end of the 5th resistance R 5 is connected with one end of the 6th resistance R 6, the electrode input end of operational amplifier respectively; The other end of the anode of the first three-terminal voltage regulator and the 6th resistance R 6 is signal ground altogether.
Preferably, all components and parts that connect signal ground, unification connects a signal ground altogether, by this signal ground ground connection.And/or, all components and parts that connect power supply ground, unification connects a power ground altogether, by this power ground ground connection.
Continue below, taking Fig. 2 as example, principle of the present invention and realization to be described, an embodiment is, as shown in Figure 2, F1 is fuse, and D1～D4, D5, D6 are rectifier diode, C1, C2 are filter capacitor, R1～R8 is resistance, and yellow square frame is control circuit part, and T1 is switch transformer, U1 is optocoupler, U2, U3 are high-precision voltage stabilizing device 431, and A1 is transport and placing device, and BAT is cell load.Operation principle is as follows: after civil power powers on, and through D1～D4 rectification, C1 filtering, high-tension electricity is delivered to time polar circuit by transformer T1 step-down, by D5 rectification, C2 filtering, then access battery by D6.
When cell voltage is during lower than full piezoelectric voltage, a point voltage is lower, and d point voltage is lower, not conducting of U3, and in optocoupler U1, diode does not have electric current to flow through, and its triode is closed, and control circuit does not have feedback signal, and charging circuit charges to battery always.
In the time that charging current is excessive, R3 both end voltage raises, and b point voltage raises, amplifier output low level, electric current flows through from R4, U1, D7, and control circuit obtains output current and crosses large-signal, thereby adjustment output current, makes charging current in stable state, prevent battery overcurrent heating blast.
Along with the carrying out of charging, cell voltage raises, and a point voltage also raises, corresponding d point voltage raises, U3 conducting, and optocoupler U1 has electric current to flow through, control circuit obtains feedback signal and reduces charging current, enters little electric current floating charge state, and this floating charge state is safe charging state.
Like this, just can realize and improve charging circuit feedback performance, Real-Time Monitoring cell voltage state prevents battery overcharge, improves charging security energy; And, by Real-Time Monitoring battery charging state, adjust charging current, make charging more rationally, more energy-conservation.
Further, embodiments of the invention can also be, each technical characterictic of the various embodiments described above, the charger feedback circuit being mutually combined to form.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a charger feedback circuit, it is characterized in that, comprise 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 voltage stabilizing circuit, operational amplifier, the second voltage stabilizing circuit and bleeder circuit;
Power input is connected with the first current rectifying and wave filtering circuit, for inputting civil power, is transferred to the first current rectifying and wave filtering circuit;
The first current rectifying and wave filtering circuit is connected with control circuit, transforming circuit respectively, for civil power is carried out to rectifying and wave-filtering, is transferred to respectively control circuit and transforming circuit;
Control circuit is connected with photoelectrical coupler, transforming circuit respectively, for according to the feedback information of photoelectrical coupler, adjusts the output current of transforming circuit;
Transforming circuit is connected with the second current rectifying and wave filtering circuit, for by civil power step-down, is transferred to the second current rectifying and wave filtering circuit;
The cathode output end of the second current rectifying and wave filtering circuit is connected with the optocoupler input positive pole of photoelectrical coupler, the input of the first voltage stabilizing circuit, the power end of operational amplifier, the input of bleeder circuit, the positive pole of charging output respectively;
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 outside battery, charges;
The electrode input end of the output concatenation operation amplifier of the first voltage stabilizing circuit;
The second voltage stabilizing circuit is the second three-terminal voltage regulator;
The output of operational amplifier is connected with the optocoupler input negative pole of photoelectrical coupler, the negative electrode of the second three-terminal voltage regulator respectively;
The reference utmost point of the second three-terminal voltage regulator, anode, the earth terminal of operational amplifier, and the output of bleeder circuit, dividing point signal ground altogether.
2. charger feedback circuit according to claim 1, is characterized in that, described the first current rectifying and wave filtering circuit comprises the electric bridge and the first capacitor C 1 that are made up of four diodes;
Transforming circuit comprises transformer T1;
The first output termination power ground of electric bridge, the second output connects power supply ground by the first capacitor C 1 and connects the first input end of control circuit and connection transformer T1 by the first resistance R 1;
Control circuit is the second input, the adjustable input of connection transformer T1 respectively;
The first output of transformer T1 connects the positive pole of the 5th diode D5;
The negative input of operational amplifier, common one end that connects the 3rd resistance R 3 of negative pole of charging output, the second output of the other end of the 3rd resistance R 3 and transformer T1 is signal ground altogether;
Bleeder circuit comprises the 7th resistance R 7 and the 8th resistance R 8 of series connection;
The power end of the negative pole concatenation operation amplifier of the 5th diode D5 is also connected the optocoupler input positive pole of photoelectrical coupler and is connected the input of the first voltage stabilizing circuit, is also connected with one end of the 7th resistance R 7, the positive pole of charging output respectively by the second resistance R 2 by the 4th resistance R 4, also connects signal ground by the second capacitor C 2;
The other end of the 7th resistance R 7, respectively with one end of the 8th resistance R 8, the other end of the 8th resistance R 8, the earth terminal of operational amplifier, the reference utmost point of the second three-terminal voltage regulator, the anode signal ground altogether of the second three-terminal voltage regulator;
The first output of photoelectrical coupler connects control circuit, the second output termination power ground.
3. charger feedback circuit according to claim 2, is characterized in that, the negative pole of the 5th diode D5 connects the positive pole of the 6th diode D6, and the negative pole of the 6th diode D6 connects the positive pole of charging output.
4. charger feedback circuit according to claim 3, is characterized in that, the positive pole of the negative pole connecting luminous diode of the 6th diode D6, and the negative pole of light-emitting diode connects the positive pole of charging output.
5. charger feedback circuit according to claim 3, it is characterized in that, the output of operational amplifier connects the negative pole of the 7th diode, and the positive pole of the 7th diode is connected with the optocoupler input negative pole of photoelectrical coupler, the negative electrode of the second three-terminal voltage regulator respectively.
6. charger feedback circuit according to claim 1, is characterized in that, also comprise a fuse, it is arranged between power input and the first current rectifying and wave filtering circuit.
7. charger feedback circuit according to claim 6, is characterized in that, described fuse is arranged between the positive pole and the first current rectifying and wave filtering circuit of power input.
8. charger feedback circuit according to claim 1, it is characterized in that, the power input of described control circuit connects the first output of the first resistance R 1, earth terminal ground connection, input connection photoelectrical coupler, the second input of output connection transformer T1, the adjustable input of adjustment end connection transformer T1.
9. charger feedback circuit according to claim 1, is characterized in that, described transformer T1 is switch transformer.
10. according to the arbitrary described charger feedback circuit of claim 1 to 9, it is characterized in that, the first voltage stabilizing circuit comprises the first three-terminal voltage regulator, the 5th resistance R 5 and the 6th resistance R 6;
The negative electrode of the first three-terminal voltage regulator be connected with reference to one end of the utmost point and the 5th resistance R 5, as the input of the first voltage stabilizing circuit;
The other end of the 5th resistance R 5 is connected with one end of the 6th resistance R 6, the electrode input end of operational amplifier respectively;
The other end of the anode of the first three-terminal voltage regulator and the 6th resistance R 6 is 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 |
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| Publication Number | Publication Date |
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| CN104079053A true CN104079053A (en) | 2014-10-01 |
| CN104079053B CN104079053B (en) | 2016-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310110211.6A Expired - Fee Related CN104079053B (en) | 2013-03-29 | 2013-03-29 | Charger feedback circuit |
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Cited By (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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100085022A1 (en) * | 2008-10-07 | 2010-04-08 | Makita Corporation | Charging apparatus |
| 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 |
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2013
- 2013-03-29 CN CN201310110211.6A patent/CN104079053B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100085022A1 (en) * | 2008-10-07 | 2010-04-08 | Makita Corporation | Charging apparatus |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN104079053B (en) | 2016-09-07 |
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Granted publication date: 20160907 Termination date: 20190329 |