CN2722488Y - Battery recharger of mobile phone - Google Patents
Battery recharger of mobile phone Download PDFInfo
- Publication number
- CN2722488Y CN2722488Y CN2004200070082U CN200420007008U CN2722488Y CN 2722488 Y CN2722488 Y CN 2722488Y CN 2004200070082 U CN2004200070082 U CN 2004200070082U CN 200420007008 U CN200420007008 U CN 200420007008U CN 2722488 Y CN2722488 Y CN 2722488Y
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- control module
- input
- voltage
- charger
- mobile phone
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Abstract
The utility model discloses a battery recharger of mobile phone. Through one step of decreasing the energy consumption of the charger when light loading or empty loading, the efficiency of the mobile phone charger can be raised, and a proper safety protection is provided for the charging process of the mobile phone battery. The service lives of the mobile phone battery and the charger body can be extended. At the same time, the components are reduced, so the cost of manufacture is decreased. The charger switch circuit comprises a control module. The control module comprises a rectifier voltage input terminal, a source terminal and a control terminal. The rectifier voltage input terminal is connected with the output terminal of a pi type wave filter, the source terminal is connected with the input terminal of an isolation transformer, and the control terminal is connected with the common terminal of the pi type wave filter and the isolation transformer through two resistors and a diode in series connection. One end of two capacitances is respectively connected with both sides of the resistors which are directly connected with the control terminal, and the other end is connected with the source terminal of the control module.
Description
Technical field
The utility model relates to a kind of charger, is specially adapted to the charger of battery of mobile phone.
Background technology
The flourishing necessity of deepening the mutual communication of people of the growth of economic height, the use of mobile phone can be said so and generally be arrived the almost state of staff one machine, generalization and globalization along with mobile phone, people are to battery charger for mobile phone having higher requirement qualitatively in every respect, except the performance requirement that must reach high efficiency, energy-conservation aspect, and also must reach light, thin, short, little exquisiteness design in appearance.But the design of present mobile telephone cell charger will be reached high efficiency and the little design pointer of volume of pursuing power supply unit at the same time, and technology is to have the considerable contradiction that designs each other basically.
The utility model content
The utility model order is to provide a kind of battery charger for mobile phone; can advance by step reduction charger at underloading or zero load time institute's consuming electric power; improve the charger for mobile phone effect; and the charging process to battery of mobile phone gives suitable safeguard protection; prolong the useful life of battery of mobile phone and charger itself; reduce components and parts simultaneously and use, reduce production costs.
The utility model is to realize like this, its circuit of a kind of battery charger for mobile phone comprises high-voltage rectifier, pi type filter, switching circuit, an isolating transformer and a lower pressure rectifier circuit, described charger switch circuit comprises a control module, control module has the commutating voltage input, three links of source terminal and control end, described commutating voltage input is connected with pi type filter one output, source terminal is connected with isolating transformer one input, control end is connected with the common port of a diode with described pi type filter and isolating transformer by two resistance of series connection, have two electric capacity one ends to be connected to and the direct-connected resistance of described control end both sides, the other end links to each other with the control module source terminal;
The commutating voltage input of described control module is an anodal and current source of letting out the utmost point, an electric current restriction comparison amplifier of the interior field effect transistor of link control module respectively, the drain electrode of wherein said field effect transistor links to each other with the control module source terminal, grid links to each other with a reverser, electric current restriction comparison amplifier negative pole is connected with electric current restriction adjusting module, and current source is connected with a switch; Described reverser input is connected with one or four input nand gate outputs, and this NAND gate input is connected with a frequency eliminating circuit, a magnetic hysteresis temperature shut-down module, an oscillator, a rest-set flip-flop, a low frequency operational module respectively; An action shut-down/automatically actuated amplifier that is used to control described switch, its electrode input end is connected with the control end of described switch and control module, and output is connected with described frequency eliminating circuit; Described rest-set flip-flop and oscillator, one or gate output terminal be connected, the output of described electric current restriction comparison amplifier and load variations edge module by one with constitute an input described or door behind the door, described or another input of door is connected with a low frequency operational module with a pulse width modulation comparison amplifier, and pulse width modulation comparison amplifier negative input is connected with oscillator; The desired signal of oscillator is provided by the low frequency operational module; Two field effect transistor are arranged, and the source electrode of its public connection connects described control module control end, public connection by a resistance grid is connected with the output that error amplifier is adjusted in a shunting, and described amplifier negative input is connected with the drain electrode of two field effect transistor; The drain electrode of described two field effect transistor, one connects described electric current restriction adjusting module, and another current source, resistance by a parallel connection is connected with the control module source terminal, and is connected with pulse width modulation comparison amplifier electrode input end by a resistance; Cross-over connection one electric capacity between pulse width modulation comparison amplifier electrode input end and the control module source terminal.
Described charger has a voltage feedback loop, and its input is connected with the charger voltage output, and its output is connected with switching circuit by an optical coupler.
After adopting said structure, the utility model in use voltage, current feedback loop constantly detects the current/voltage situation of output, and send information to control module and adjust output voltage, the entire work process that is transformer is in the loop control state, has guaranteed accuracy, the stability of charger output voltage; In like manner, if charger is in underloading or Light Condition, control module is adjusted the charger power output, saves electric energy.Simultaneously; the existing charger of contrast; the control module that the utility model adopts has reduced much components and parts required in the charger circuit; reduced cost; with minimum cost; minimum components and parts, reach general battery charger for mobile phone required decide the opening automatically of voltage constant-current circuit, short-circuit protection.
Description of drawings
Fig. 1 is the utility model schematic diagram;
Fig. 2 has the schematic diagram of voltage feedback loop for the utility model;
Fig. 3 is the utility model control module schematic diagram;
Fig. 4 is existing charger circuit schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
Fig. 1 is a constant-current charge device schematic diagram, its circuit comprises high-voltage rectifier 1, pi type filter 2, switching circuit 3, isolating transformer 4 and a lower pressure rectifier circuit 5, charger switch circuit bag 3 is drawn together a control module 31, control module has commutating voltage input D, three links of source terminal S and control end C, commutating voltage input D is connected with pi type filter 2 one outputs, source terminal S is connected with isolating transformer 4 one inputs, control end C is by two resistance R 1 of series connection, R2 is connected with the common port of pi type filter 2 with isolating transformer 4 with a diode D1, two capacitor C 1 are arranged, C2 one end is connected to and the direct-connected resistance R of control end C 1 both sides, and the other end links to each other with control module source terminal S.
As shown in Figure 3, control module 31 commutating voltage input D are the anodal and current source I1 who lets out the utmost point, an electric current restriction comparison amplifier OP1 of link control module 31 interior field effect transistor Q1 respectively, wherein the drain electrode of field effect transistor Q1 links to each other with control module source terminal S, grid links to each other with a reverser NOT1, electric current restriction comparison amplifier OP1 negative pole is connected with electric current restriction adjusting module 311, and current source I1 is connected with a switch S 1; Reverser NOT1 input is connected with one or four input nand gate NAND1 outputs, and this NAND gate input is connected with a frequency eliminating circuit 312, a magnetic hysteresis temperature shut-down module 313, an oscillator U1, a rest-set flip-flop RSFF1 and a low frequency operational module 315 respectively; Shut-down that is used to control the action of described switch/start its electrode input end of amplifier OP2 automatically to be connected with the control end C of switch S 1 and control module 31, output is connected with frequency eliminating circuit 312; Rest-set flip-flop RSFF1 and oscillator U1, one or a door OR1 output be connected, the output of electric current restriction comparison amplifier OP1 and load variations edge module 314 by one with door AND1 after constitute or the input of door OR1, or another input of door OR1 is connected with a low frequency operational module 315 with a pulse width modulation comparison amplifier OP4, pulse width modulation comparison amplifier OP4 negative input is connected with oscillator U1 with low frequency operational module 315, and the desired signal of oscillator is provided by low frequency operational module 315; The source electrode of two field effect transistor Q1, the public connection of Q2 is by a resistance R
CThe grid of link control module control end, public connection is connected with the output that error amplifier OP3 is adjusted in a shunting, and the amplifier negative input is connected with the drain electrode of two field effect transistor; The drain electrode of two field effect transistor Q2, Q3, Q2 connects electric current restriction adjusting module 311, another current source I2 by a parallel connection is connected with control module 31 source terminal S with resistance R 6, and is connected with pulse width modulation comparison amplifier OP4 electrode input end by a resistance R 5; Cross-over connection one capacitor C 6 between pulse width modulation comparison amplifier electrode input end and the control module source terminal.
Shown in Fig. 1,3, when charger shown in Figure 1 is connected with the mains, input voltage VIN is powered to control module as an external power source via voltage rectifier 1, pi type filter 2 backs, capacitor C 1 is charged to control end C by control module commutating voltage input D simultaneously, when terminals C voltage probably reaches relative voltage with terminals S and is 5.6V, switch S 1 action, switch to control module 31 internal electric sources, control module is by internal electric source and capacitor C 1 power supply, and this moment, high-voltage field effect transistor Q1 began action.When the Vc of control end C during greater than 5.6V switch S 1 switch to internal electric source, if during, then switch to the use external power source less than 4.7V.
Shunting adjuster/error amplifier OP3 is used for controlling Vc, makes Vc maintain 5.6V, the switch opens in the place ahead then when Vc is lower than 5.6, this moment I
FBTo descend, then the V+ of pulse width modulation comparator descends, and it is big that Duty becomes, and Vout also just increases, and Vc rises, I
FBRise, then the V+ of pulse width modulation comparator rises, and Duty reduces, and Vout also just reduces, and Vout reduces, and Vc descends ... so circulation just can have been reached stable control.
Electric current restriction comparison amplifier OP1 is as heavy load, be when electric current is excessive in the circuit, Vc descends, switch On, "-" terminal potential of comparison amplifier descends, then the output frequently of the high electricity of comparator, if directly receive R end with this signal this moment, then R=1 might occur, the phenomenon of S=1 makes rest-set flip-flop be in illegal state.In the circuit, will add as the field effect transistor OP1 signal of high-voltage switch gear in the load variations edge circuit 314 in case plant the situation generation here.
Magnetic hysteresis temperature shut-down module 313 is to be used for avoiding when the isolating transformer temperature is too high, and the hysteresis that is produced has influence on the operate as normal of circuit.During charger work, control module operates in the high frequency state of 42KHz, the direct voltage that is to say high pressure can be cut into high-frequency square-wave signal, and the voltage quasi position via isolating transformer secondary side acquisition expection is filtered into a required VD through current rectifying and wave filtering circuit again.
As shown in Figure 2, the utility model has the circuit theory diagrams of voltage feedback loop, increase a voltage feedback loop 6, specifically, described voltage feedback loop input is the circuit of a voltage induced, the light-emitting diode and the voltage stabilizing didoe VR1 that comprise two resistance R 4, R5, optical coupler U1, it is in parallel after wherein resistance R 5 is connected with light-emitting diode with resistance R 4, connect with voltage stabilizing didoe again and be placed between charger two outputs, R5 is a low resistance resistance optionally, the output ripple peak current of restriction photoelectrical coupler light-emitting diode; Output is a power supply differentiator that is made of resistance R 3, capacitor C 3 and optical coupler U1, be connected on the circuit between the common port of control end C and pi type filter and isolating transformer, wherein the photoelectrical coupler U1 collection utmost point is connected to the ground of charger primary side, emitter-base bandgap grading is connected to the anode of the diode D1 that is connected with control module 31 control ends, this kind connection allows optical coupler be electricity state stably in circuit, otherwise if optical sensor is placed the negative electrode of D1, it will become switch, and its parasitism will produce extra EMI electric current.
Charger shown in Figure 2 is operated in when deciding voltage status, and is identical with the charger course of work shown in Figure 1.But the peak current interior as if control module in the course of work is lower than the extreme value of internal current, voltage feedback loop action this moment, and charger transfers the constant-voltage charge pattern to by the constant-current charge pattern.
If unusual condition takes place, as overload, short circuit or feedback unusually etc., control module can reach the security regulations of stoppage protection by overheated shutdown of inner setting and the action of electric current restricted internal loop; If control module can be adjusted the charger power output, and reach the pattern of energy saving standby when underloading.
Such as the output short circuit or open the loop, avoid a large amount of foreign currents to flow into control end C, capacitor C 1 can discharge into 4.7V, renews automatically start to close field-effect transistor Q1 when 4.7V, and circuit is controlled in the standby of low current.When renewing attitude automatically, control module can periodically renew the supply output of power supply, so can recover normal power supply supply when fault is got rid of.Above-mentioned characteristic provide an approximate power supply supply of decide voltage/decide electric current CC export not must secondary side voltage or current feedback, the adjustment of output voltage can be subjected to the influence of capacitor C 2 both end voltage with the quality of output voltage change degree.
The error amount that the action that these capacitor C 2 both end voltage change with output voltage can be caused by the leakage inductance value of transformer influences.Resistance R 2 and capacitor C 2 can partly filter out the tip voltage of leakage inductance, to reduce this error.Provide the output loading adjustment better with standard De Luan depressor manufacturing technology in this circuit than linear transformer, the solution of an ideal source in using, many small power supply is provided, stricter if desired load voltage stabilizing, see through the optics connecting structure, use control module that the fixedly characteristic of output current still can be provided.
Fig. 4 is existing charger circuit schematic diagram, and comparison diagram 1,2 and Fig. 4 are not difficult to find out, the components and parts that the utility model uses have lacked much relatively.
Claims (5)
1, a kind of battery charger for mobile phone, its circuit comprise high-voltage rectifier, pi type filter, switching circuit, isolating transformer and individual lower pressure rectifier circuit, it is characterized in that:
Described charger switch circuit comprises a control module, control module has commutating voltage input, source terminal and three links of control end, described commutating voltage input is connected with pi type filter one output, source terminal is connected with isolating transformer one input, control end is connected with the common port of a diode with described pi type filter and isolating transformer by two resistance of series connection, have two electric capacity one ends to be connected to and the direct-connected resistance of described control end both sides, the other end links to each other with the control module source terminal;
The commutating voltage input of described control module is an anodal and current source of letting out the utmost point, an electric current restriction comparison amplifier of the interior field effect transistor of link control module respectively, the drain electrode of wherein said field effect transistor links to each other with the control module source terminal, grid links to each other with a reverser, electric current restriction comparison amplifier negative pole is connected with electric current restriction adjusting module, and current source is connected with a switch; Described reverser input is connected with one or four input nand gate outputs, and this NAND gate input is connected with a frequency eliminating circuit, a magnetic hysteresis temperature shut-down module, an oscillator, a rest-set flip-flop, a low frequency operational module respectively; An action shut-down/automatically actuated amplifier that is used to control described switch, its electrode input end is connected with the control end of described switch and control module, and output is connected with described frequency eliminating circuit; Described rest-set flip-flop and oscillator, one or gate output terminal be connected, the output of described electric current restriction comparison amplifier and load variations edge module by one with constitute an input described or door behind the door, described or another input of door is connected with a low frequency operational module with a pulse width modulation comparison amplifier, pulse width modulation comparison amplifier negative input is connected with oscillator, and the desired signal of oscillator is provided by the low frequency operational module; Two field effect transistor are arranged, and the source electrode of its public connection connects described control module control end, public connection by a resistance grid is connected with the output that error amplifier is adjusted in a shunting, and described amplifier negative input is connected with the drain electrode of two field effect transistor; The drain electrode of described two field effect transistor, one connects described electric current restriction adjusting module, and another current source, resistance by a parallel connection is connected with the control module source terminal, and is connected with pulse width modulation comparison amplifier electrode input end by a resistance; Cross-over connection one electric capacity between pulse width modulation comparison amplifier electrode input end and the control module source terminal.
2, the described battery charger for mobile phone of claim 1 is characterized in that: a voltage feedback loop is arranged, and its input is connected with the charger voltage output, and its output is connected with switching circuit.
3, the described battery charger for mobile phone of claim 2, it is characterized in that: described voltage feedback loop input is the circuit of a voltage induced, light-emitting diode and a voltage stabilizing didoe of comprising a resistance, optical coupler, described light-emitting diode is in parallel with resistance, connects with voltage stabilizing didoe to be placed between charger two outputs again; Output is by a resistance, an electric capacity and the power supply differentiator that optical coupler constitutes, and is connected on the circuit between the common port of control module control end and pi type filter and isolating transformer.
4, the described battery charger for mobile phone of claim 3 is characterized in that: the resistance of connecting between the light-emitting diode of the optical coupler of the defeated as end of described Voltage Feedback and transformer output.
5, claim 3 or 4 described battery charger for mobile phone is characterized in that: the described photoelectrical coupler collection utmost point is connected between the common port of pi type filter and isolating transformer, and emitter-base bandgap grading is connected to the anode of the diode that is connected with the control module control end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004200070082U CN2722488Y (en) | 2004-03-15 | 2004-03-15 | Battery recharger of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004200070082U CN2722488Y (en) | 2004-03-15 | 2004-03-15 | Battery recharger of mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2722488Y true CN2722488Y (en) | 2005-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2004200070082U Expired - Fee Related CN2722488Y (en) | 2004-03-15 | 2004-03-15 | Battery recharger of mobile phone |
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| CN (1) | CN2722488Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101312295B (en) * | 2007-05-25 | 2010-06-02 | 仁宝电脑工业股份有限公司 | Charging circuit |
| CN101471581B (en) * | 2007-12-27 | 2010-12-01 | 深圳富泰宏精密工业有限公司 | Charging protection device |
| CN101278477B (en) * | 2005-10-24 | 2011-05-18 | 三星电子株式会社 | Digital audio amplifier and digital audio amplifying method therefor |
| CN102593881A (en) * | 2011-11-14 | 2012-07-18 | 深圳市海思半导体有限公司 | Charging power supply circuit, method and application apparatus |
| WO2013075397A1 (en) * | 2011-11-25 | 2013-05-30 | 欧姆龙株式会社 | Photoelectric sensor |
-
2004
- 2004-03-15 CN CN2004200070082U patent/CN2722488Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101278477B (en) * | 2005-10-24 | 2011-05-18 | 三星电子株式会社 | Digital audio amplifier and digital audio amplifying method therefor |
| CN101312295B (en) * | 2007-05-25 | 2010-06-02 | 仁宝电脑工业股份有限公司 | Charging circuit |
| CN101471581B (en) * | 2007-12-27 | 2010-12-01 | 深圳富泰宏精密工业有限公司 | Charging protection device |
| CN102593881A (en) * | 2011-11-14 | 2012-07-18 | 深圳市海思半导体有限公司 | Charging power supply circuit, method and application apparatus |
| CN102593881B (en) * | 2011-11-14 | 2014-07-09 | 深圳市海思半导体有限公司 | Charging power supply circuit, method and application apparatus |
| WO2013075397A1 (en) * | 2011-11-25 | 2013-05-30 | 欧姆龙株式会社 | Photoelectric sensor |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |