CN104882953A - Mobile phone charging control circuit - Google Patents
Mobile phone charging control circuit Download PDFInfo
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- CN104882953A CN104882953A CN201510283604.6A CN201510283604A CN104882953A CN 104882953 A CN104882953 A CN 104882953A CN 201510283604 A CN201510283604 A CN 201510283604A CN 104882953 A CN104882953 A CN 104882953A
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- transformer
- control circuit
- triode
- mobile phone
- charging control
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Abstract
The invention discloses a mobile phone charging control circuit comprising a rectifier bridge circuit, a transformer, a triode, and a feedback control circuit; an input end of the rectifier bridge circuit is connected with an external civil power; a positive output end of the rectifier bridge circuit is connected with an A end of a transformer primary winding, and also connected with a cathode of a first Zener diode; an node of the first Zener diode is connected with a B end of the transformer primary winding through a capacitor; the positive output end of the rectifier bridge circuit is also connected with a base electrode of the triode through a start resistor; a collector of the triode is connected with the B end of the transformer primary winding; an emitter electrode of the triode is connected with a negative output end of the rectifier bridge circuit through a resistor; a secondary winding of the transformer is an output end; a sampling winding of the transformer is connected with the base electrode of the triode through the feedback control circuit. The mobile phone charging control circuit is simple in circuit, easy to realize, low in cost, small in size, can be conveniently arranged in the mobile phone, and has excellent application prospect.
Description
Technical field
The present invention relates to a kind of charging control circuit for mobile phone, belong to charging technique field.
Background technology
At present, be applied to the charging control circuit on mobile phone on the market, circuit more complicated, used electronic devices and components are more, and cost of manufacture is higher, thus cause the volume of circuit board comparatively large, are not easy to be arranged on interior of mobile phone.
Summary of the invention
The object of the invention is to overcome the existing charging control circuit be applied on mobile phone, circuit more complicated, used electronic devices and components are more, and cost of manufacture is higher, thus cause the volume of circuit board comparatively large, are not easy to be arranged on interior of mobile phone.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of charging control circuit for mobile phone, it is characterized in that: comprise rectifier circuit, transformer T1, triode Q1, feedback control circuit, the external civil power of input of described rectifier circuit, the positive output end of described rectifier circuit is held with the A of transformer T1 armature winding and is connected, the positive output end of described rectifier circuit is also connected with the negative pole of the first voltage stabilizing didoe D1, the positive pole of described first voltage stabilizing didoe D1 to be held with the B of transformer T1 armature winding by electric capacity C1 and is connected, the positive output end of described rectifier circuit is also connected with the base stage of triode Q1 by starting resistance R1, the collector electrode of described triode Q1 is held with the B of transformer T1 armature winding and is connected, the emitter of described triode Q1 is connected with the negative output terminal of rectifier circuit by resistance R2, one end of described transformer T1 secondary winding is also connected with the positive pole of light-emitting diode D2, the negative pole of described Schottky diode VD is in series with current-limiting resistance R3, the rear end parallel connection of described current-limiting resistance R3 is load RL, described load RL is as the output of charging control circuit, the sampling winding of described transformer T1 is connected by the base stage of feedback control circuit with triode Q1, described feedback control circuit comprises sampling current resistance R4, second voltage stabilizing didoe D2, first diode D3, second diode D4, one end that described transformer T1 samples winding respectively with one end of sampling current resistance R4, the negative pole of the first diode D3 is connected, the other end that the positive pole of described first diode D3 also samples winding by polar capacitor C2 and transformer T1 is connected, the other end of described sampling current resistance R4 is connected with the base stage of triode Q1 by electric capacity C3, the positive pole of described second voltage stabilizing didoe D2 is connected with the positive pole of the first diode D3, the negative pole of described second voltage stabilizing didoe D2 is connected with the base stage of triode Q1, the positive pole of described second diode D4 is connected with the other end that transformer T1 samples winding, the negative pole of described second diode D4 is connected with the base stage of triode Q1.
Aforesaid a kind of charging control circuit for mobile phone, is characterized in that: described triode Q1 is NPN triode.
Aforesaid a kind of charging control circuit for mobile phone, is characterized in that: the two ends of described transformer T1 secondary winding are also parallel with filter capacitor C4.
Aforesaid a kind of charging control circuit for mobile phone, is characterized in that: described transformer T1 is high frequency switch transformer.
Aforesaid a kind of charging control circuit for mobile phone, is characterized in that: the positive input terminal series connection of described rectifier circuit is fuse F1.
Aforesaid a kind of charging control circuit for mobile phone, is characterized in that: the output voltage of described transformer T1 secondary winding is between 5V-6.2V.
Aforesaid a kind of charging control circuit for mobile phone, is characterized in that: the rear end of described current-limiting resistance R3 is in series with light-emitting diode D5.
The invention has the beneficial effects as follows: the charging control circuit for mobile phone of the present invention, being provided with feedback control circuit, when charging saturated, output voltage can being reduced, prevent from overcharging, circuit is simple, and used electronic devices and components are few, easily realize, with low cost, volume is little, is convenient to be arranged in mobile phone, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the system block diagram of a kind of charging control circuit for mobile phone of the present invention.
Embodiment
Below in conjunction with Figure of description, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, charging control circuit for mobile phone of the present invention, comprise rectifier circuit, transformer T1, triode Q1, feedback control circuit, the external civil power of input of rectifier circuit, the positive output end of rectifier circuit is held with the A of transformer T1 armature winding and is connected, the positive output end of rectifier circuit is also connected with the negative pole of the first voltage stabilizing didoe D1, the positive pole of the first voltage stabilizing didoe D1 to be held with the B of transformer T1 armature winding by electric capacity C1 and is connected, the positive output end of rectifier circuit is also connected with the base stage of triode Q1 by starting resistance R1, the collector electrode of triode Q1 is held with the B of transformer T1 armature winding and is connected, the emitter of triode Q1 is connected with the negative output terminal of rectifier circuit by resistance R2, one end of transformer T1 secondary winding is also connected with the positive pole of light-emitting diode D2, the negative pole of Schottky diode VD is in series with current-limiting resistance R3, the rear end parallel connection of current-limiting resistance R3 is load RL, load RL is as the output of charging control circuit, the sampling winding of transformer T1 is connected by the base stage of feedback control circuit with triode Q1, feedback control circuit comprises sampling current resistance R4, second voltage stabilizing didoe D2, first diode D3, second diode D4, one end that transformer T1 samples winding respectively with one end of sampling current resistance R4, the negative pole of the first diode D3 is connected, the other end that the positive pole of the first diode D3 also samples winding by polar capacitor C2 and transformer T1 is connected, the other end of sampling current resistance R4 is connected with the base stage of triode Q1 by electric capacity C3, the positive pole of described second voltage stabilizing didoe D2 is connected with the positive pole of the first diode D3, the negative pole of described second voltage stabilizing didoe D2 is connected with the base stage of triode Q1, the positive pole of described second diode D4 is connected with the other end that transformer T1 samples winding, the negative pole of described second diode D4 is connected with the base stage of triode Q1.
Described triode Q1 is NPN triode, the two ends of transformer T1 secondary winding are also parallel with filter capacitor C4, improve the stability of output voltage, to give the charge in batteries in mobile phone, transformer T1 is high frequency switch transformer, iron core is high frequency ferrite core, there is high resistivity, to reduce eddy current, improve conversion effect, by external load resistance RL, output voltage is between 5V-6.2V, a little more than the 5V voltage giving storage battery in mobile phone, be convenient to charge to storage battery in mobile phone, the positive input terminal series connection of rectifier circuit is fuse F1, prevent electric current excessive, burn out other electronic devices and components.
The rear end of described current-limiting resistance R3 is in series with light-emitting diode D5.
Charging control circuit for mobile phone of the present invention, operation principle is: civil power inputs, rectifier circuit rectification, transformer T1 is delivered to through the first voltage stabilizing didoe D1, starting resistance R1, the emitter current started is provided to triode Q1, when triode Q1 is in cut-off state, the normal work of transformer T1 armature winding, the voltage exporting 5V-6.2V charges to storage battery in mobile phone, when in mobile phone, charge in batteries is saturated, voltage reaches more than 5V, output voltage close to transformer T1 reaches the highest, voltage on the sampling current resistance R4 of feedback control circuit raises along with the output of transformer T1 is greater than and increases, cause triode Q1 conducting, the armature winding of transformer T1 does not work, do not carry out voltage output, realize FEEDBACK CONTROL like this, even if charging is not pulled out, in fact also do not charge, easy to use, simple and reliable.
Charging control circuit for mobile phone of the present invention, is provided with feedback control circuit, when charging saturated, can reduce output voltage, prevent from overcharging, circuit is simple, and used electronic devices and components are few, easily realize, with low cost, volume is little, is convenient to be arranged in mobile phone, has a good application prospect.
More than show and describe general principle of the present invention, principal character and advantage.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (7)
1. the charging control circuit for mobile phone, it is characterized in that: comprise rectifier circuit, transformer T1, triode Q1, feedback control circuit, the external civil power of input of described rectifier circuit, the positive output end of described rectifier circuit is held with the A of transformer T1 armature winding and is connected, the positive output end of described rectifier circuit is also connected with the negative pole of the first voltage stabilizing didoe D1, the positive pole of described first voltage stabilizing didoe D1 to be held with the B of transformer T1 armature winding by electric capacity C1 and is connected, the positive output end of described rectifier circuit is also connected with the base stage of triode Q1 by starting resistance R1, the collector electrode of described triode Q1 is held with the B of transformer T1 armature winding and is connected, the emitter of described triode Q1 is connected with the negative output terminal of rectifier circuit by resistance R2, one end of described transformer T1 secondary winding is also connected with the positive pole of light-emitting diode D2, the negative pole of described Schottky diode VD is in series with current-limiting resistance R3, the rear end parallel connection of described current-limiting resistance R3 is load RL, described load RL is as the output of charging control circuit, the sampling winding of described transformer T1 is connected by the base stage of feedback control circuit with triode Q1, described feedback control circuit comprises sampling current resistance R4, second voltage stabilizing didoe D2, first diode D3, second diode D4, one end that described transformer T1 samples winding respectively with one end of sampling current resistance R4, the negative pole of the first diode D3 is connected, the other end that the positive pole of described first diode D3 also samples winding by polar capacitor C2 and transformer T1 is connected, the other end of described sampling current resistance R4 is connected with the base stage of triode Q1 by electric capacity C3, the positive pole of described second voltage stabilizing didoe D2 is connected with the positive pole of the first diode D3, the negative pole of described second voltage stabilizing didoe D2 is connected with the base stage of triode Q1, the positive pole of described second diode D4 is connected with the other end that transformer T1 samples winding, the negative pole of described second diode D4 is connected with the base stage of triode Q1.
2. a kind of charging control circuit for mobile phone according to claim 1, is characterized in that: described triode Q1 is NPN triode.
3. a kind of charging control circuit for mobile phone according to claim 1, is characterized in that: the two ends of described transformer T1 secondary winding are also parallel with filter capacitor C4.
4. a kind of charging control circuit for mobile phone according to claim 1, is characterized in that: described transformer T1 is high frequency switch transformer.
5. a kind of charging control circuit for mobile phone according to claim 1, is characterized in that: the positive input terminal series connection of described rectifier circuit is fuse F1.
6. a kind of charging control circuit for mobile phone according to claim 1, is characterized in that: the output voltage of described transformer T1 secondary winding is between 5V-6.2V.
7. a kind of charging control circuit for mobile phone according to claim 1, is characterized in that: the rear end of described current-limiting resistance R3 is in series with light-emitting diode D5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510283604.6A CN104882953A (en) | 2015-05-29 | 2015-05-29 | Mobile phone charging control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510283604.6A CN104882953A (en) | 2015-05-29 | 2015-05-29 | Mobile phone charging control circuit |
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| CN104882953A true CN104882953A (en) | 2015-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510283604.6A Pending CN104882953A (en) | 2015-05-29 | 2015-05-29 | Mobile phone charging control circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2678230Y (en) * | 2003-08-01 | 2005-02-09 | 深圳市中资源科技发展有限公司 | Charger for battery of mobile phone |
| CN101567631A (en) * | 2009-06-03 | 2009-10-28 | 江苏银佳企业集团有限公司 | Wide voltage self-excited switching power supply |
| CN202353252U (en) * | 2011-11-23 | 2012-07-25 | 台州市椒江神舟电子电器厂 | Intelligent electronic charger |
| GB2509566B (en) * | 2013-01-08 | 2014-12-31 | Energy Control Ltd | A secondary battery assembly with an overcharge protection circuit |
| CN204732947U (en) * | 2015-05-29 | 2015-10-28 | 苏州工业职业技术学院 | A kind of charging control circuit for mobile phone |
-
2015
- 2015-05-29 CN CN201510283604.6A patent/CN104882953A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2678230Y (en) * | 2003-08-01 | 2005-02-09 | 深圳市中资源科技发展有限公司 | Charger for battery of mobile phone |
| CN101567631A (en) * | 2009-06-03 | 2009-10-28 | 江苏银佳企业集团有限公司 | Wide voltage self-excited switching power supply |
| CN202353252U (en) * | 2011-11-23 | 2012-07-25 | 台州市椒江神舟电子电器厂 | Intelligent electronic charger |
| GB2509566B (en) * | 2013-01-08 | 2014-12-31 | Energy Control Ltd | A secondary battery assembly with an overcharge protection circuit |
| CN204732947U (en) * | 2015-05-29 | 2015-10-28 | 苏州工业职业技术学院 | A kind of charging control circuit for mobile phone |
Non-Patent Citations (1)
| Title |
|---|
| 硬软兼得: "手机充电器电路图", 《HTTP://BLOG.SINA.COM.CN/S/BLOG_4AD042E50100PZAD.HTML》 * |
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Application publication date: 20150902 |
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| RJ01 | Rejection of invention patent application after publication |