CN202374008U - Mobile phone charging circuit - Google Patents
Mobile phone charging circuit Download PDFInfo
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- CN202374008U CN202374008U CN2011205406028U CN201120540602U CN202374008U CN 202374008 U CN202374008 U CN 202374008U CN 2011205406028 U CN2011205406028 U CN 2011205406028U CN 201120540602 U CN201120540602 U CN 201120540602U CN 202374008 U CN202374008 U CN 202374008U
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Abstract
The utility model discloses a mobile phone charging circuit. The mobile phone charging circuit comprises a charger voltage input port, a charging current detection port, a transistor, a charger voltage output port, a current detection resistor unit, a first resistor, a field-effect tube and a charging current adjusting port, wherein an emitter of the transistor is connected with the charger voltage input port; a collector of the transistor is connected with the charging current detection port; the current detection resistor unit is connected between the charger voltage output port and the charging current detection port; the current detection resistor unit comprises a plurality of current detection resistors which are connected in parallel; the grid electrode of the field-effect tube is connected with the charger voltage input port trough the first resistor; the drain electrode of the field-effect tube is connected with the base of the transistor; and the source electrode of the field-effect tube is connected with the charging current adjusting port. On the premise of ensuring safety of charging, the charging current can be greatly increased and quick charging for a mobile phone battery is realized by the mobile phone charging circuit, and the cost is hardly increased.
Description
Technical field
The utility model relates to charging circuit, more particularly, relates to a kind of cell phone charging circuit.
Background technology
Present cell-phone function is more and more, and function from strength to strength.But the capacity of battery of mobile phone is limited, and mobile phone might use less than one day, and battery electric quantity has just been used up.At present, have two kinds of methods to improve this problem, a kind of is to increase battery capacity, such as increasing to 4000mah; Another kind is to increase charging current, shortens the charging interval, for example, can be full of 60% electric energy to battery in 15 minutes, realizes the purpose of quick electric energy supplement.
In essence, above-mentioned dual mode is all had higher requirement to charging current, promptly has only the raising charging current, could satisfy the charging demand that battery capacity increases, the purpose of perhaps big electric current quick charge.
Existing cell phone charging circuit is as shown in Figure 1, and existing cell phone charging circuit comprises transistor U401, FET U402, resistance R 402-resistance R 405, capacitor C 415 and capacitor C 422.Wherein, the emitter of transistor U401 connects the drain electrode of charger voltage input port VCHG, collector electrode connection charging current detection port ISENSE, base stage connection FET U402; The grid of FET U402 through resistance R 403 be connected with charger voltage input port VCHG, source electrode and charging current regulate port VDRV and be connected; Reference voltage port CHR LDO is connected with charger voltage input port VCHG through resistance R 403; Capacitor C 415 1 ends are connected in node, the other end ground connection of reference voltage port CHR LDO and resistance R 403; Charger inserts a detection mouthful VCDT and is connected with charger voltage input port VCHG through resistance R 402; Resistance R 404 1 ends are connected in charger and insert node, the other end ground connection of detecting mouthful VCDT and resistance R 402; Capacitor C 422 1 ends connect charger voltage input port VCHG, other end ground connection; Resistance R 405 is connected between charging current detection port ISENSE and the charging voltage output port VBAT.
The power of the transistor U401 that adopts in the existing cell phone charging circuit is 1W; Pressure drop through detecting resistance R 405 two ends to be calculating charging current, and the output current that comes oxide-semiconductor control transistors U401 through control FET U402 is to reach the purpose of regulating charging current.
Existing cell phone charging circuit can't be implemented under the prerequisite that guarantees safe charging, gives the battery of mobile phone quick charge.Because when using high-power charger to come as charging mobile phone battery; Because the power of transistor U401 is little; Can cause the damage of transistor U401; Even simply transistor U401 is replaced by more powerful transistor,, and stop charging because the software detection in the mobile phone is big to the pressure drop change at resistance R 405 two ends.
At present, the charging current of mobile phone is generally about 500ma, if be full of the battery of a 4000mah, needs ten hours nearly.In addition, the charging current of 500ma can't be full of the electric energy more than 60% within a short period of time a standard cell, is full of the electric energy more than 60% for example in 15 minutes, for a standard cell.
Therefore, guaranteeing that significantly increasing charging current under the prerequisite of safe charging is the technical problem that this patent solves.
The utility model content
The utility model can't provide a kind of and guarantee under the prerequisite of safe charging, significantly to increase the cell phone charging circuit that charging current realizes the quick charge of mobile phone batteries in the defective that guarantees that mobile phone batteries is carried out quick charge under the prerequisite of safe charging to existing cell phone charging circuit.
The utility model solves the technical scheme that its technical problem adopted: a kind of cell phone charging circuit is provided; Comprise charger voltage input port, charging current detection port and transistor; Wherein, Said transistorized emitter is connected with said charger voltage input port, collector electrode is connected with said charging current detection port, said circuit also comprise the charging voltage output port and be connected said charging voltage output port and said charging current detection port between inspection leakage resistance unit; Said inspection leakage resistance unit comprises the inspection leakage resistance of a plurality of parallel connections; Said circuit also comprises first resistance, FET and charging current adjustment port; Wherein, the grid of said FET through said first resistance be connected with said charger voltage input port, drain electrode is connected with said transistorized base stage, source electrode is connected with said charging current adjustment port.
The cell phone charging circuit of the utility model, the resistance of the inspection leakage resistance of a plurality of parallel connections in the said inspection leakage resistance unit is identical.
Preferably, said inspection leakage resistance unit comprises the inspection leakage resistance of two parallel connections.
The cell phone charging circuit of the utility model; Also comprise the reference voltage port and first electric capacity; Said reference voltage port is connected with said charger voltage input port through said first resistance, and an end of said first electric capacity is connected in node, the other end ground connection of said first resistance and said reference voltage port.
Preferably; Said circuit comprises that also charger inserts detection port, second electric capacity, second resistance and the 3rd resistance; Said charger inserts detection port and is connected with said charger voltage input port through said second resistance; One end of said the 3rd resistance is connected in node, the other end ground connection of said second resistance and said charger insertion detection port, and an end of said second electric capacity is connected with said charger voltage input port, other end ground connection.
The cell phone charging circuit of the utility model has following beneficial effect: through high-power transistor is set, make charging circuit can adapt to high-power charger; In addition; Through the inspection leakage resistance unit of the inspection leakage resistance that comprises a plurality of parallel connections is set between charging current detection port and charging voltage output port; Make under the constant situation of pressure drop at inspection two ends, leakage resistance unit, increased the charging current of output, guaranteed the safety of battery of mobile phone simultaneously; Both combine, and make that the cell phone charging circuit of the utility model can be under the prerequisite that guarantees safe charging, significantly increase charging current, realized the quick charge of mobile phone batteries, and, the increase that does not almost bring cost.
Description of drawings
Fig. 1 is the circuit diagram of existing cell phone charging circuit;
Fig. 2 is the circuit diagram of cell phone charging circuit first embodiment of the utility model;
Fig. 3 is the circuit diagram of cell phone charging circuit second embodiment of the utility model;
Fig. 4 is the circuit diagram of cell phone charging circuit the 3rd embodiment of the utility model;
Fig. 5 is the circuit diagram of cell phone charging circuit the 4th embodiment of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the cell phone charging circuit of the utility model is done further explanation and explanation.
Fig. 2 is the circuit diagram of cell phone charging circuit first embodiment of the utility model; As shown in Figure 2; In the present embodiment; Cell phone charging circuit comprises charger voltage input port 110, charging current detection port 120 and transistor 130, and wherein, the emitter of transistor 130 is connected with charger voltage input port 110, collector electrode is connected with charging current detection port 120; Cell phone charging circuit also comprise charging voltage output port 140 and be connected charging voltage output port 140 and charging current detection port 120 between inspection leakage resistance unit 150, inspection leakage resistance unit 150 comprises the inspection leakage resistance 151 of a plurality of parallel connections; Cell phone charging circuit also comprises first resistance 160, FET 170 and charging current adjustment port one 80; Wherein, the grid of FET 170 warp first resistance 160 is connected with charger voltage input port 110, drain electrode is connected with the base stage of transistor 130, source electrode is connected with charging current adjustment port one 80.
In the present embodiment; The transistor (U401 as shown in Figure 1) that the power of transistor 130 is compared in the existing cell phone charging circuit is big; For example the power of transistor 130 is 3W (example but be not used in restriction), so the cell phone charging circuit of the utility model can adapt to high-power charger.Owing to comprised the inspection leakage resistance 151 of a plurality of parallel connections in the inspection leakage resistance unit 150; Through selection to a plurality of inspection leakage resistance 151 resistances; Can be implemented under the situation that the electric current of transistor 130 output increases, the pressure drop at inspection 150 two ends, leakage resistance unit does not change.Like this, can be under the situation that does not change the software setting in the mobile phone, realize increasing output charging current, be the battery of mobile phone quick charge, and mobile phone can not stop because of the increase of charging current charging yet.Therefore, the cell phone charging circuit of the utility model has versatility.
In the present embodiment; Mobile phone is regulated port 180 monitoring charging current in real time through charging current; Come oxide-semiconductor control transistors 130 through control FET 170, to realize control (this part is a prior art, and its operation principle is not launched to describe at this) to transistor 130 output currents.Therefore, the cell phone charging circuit of the utility model can realize filling soon the charging modes that combines with trickle charge.
What is called is filled soon, is meant to be full of 60% and the charging modes of above electric weight within a short period of time.For example, capacity is the battery of 1000mah, with the current charges of 2A, like this, about half an hour, can be full of the monoblock battery in theory, can be full of 60% electric energy about 15 minutes.So-called trickle charge is meant the charging modes that mobile phone is common.For go on business, the cellphone subscriber of out on tours, what mobile phone had a battery fills function soon, can solve the problem of a lot of reality, makes the use of mobile phone more convenient.
Particularly; In cell phone software, set and fill the time soon; Allow mobile phone in the time that is provided with, battery to be carried out quick charge, after treating to fill end soon, mobile phone is regulated the charging current that port 180 control FETs 170 come oxide-semiconductor control transistors 130 outputs through charging current; Thereby the charging current that makes transistor 130 export reduces when comparatively fast filling pattern, realizes that remaining battery electric quantity is full of with common charging modes.For example; Electric weight is the battery of mobile phone of 1000mah; The charging current of exporting 2A through the cell phone charging circuit of the utility model is its charging, like this, about half an hour, can be full of the electric weight of monoblock battery in theory; Can be full of 60% electric energy about 15 minutes, improve the efficient of charging greatly.Otherwise, if can be full of 60% electric energy in 15 minutes, then can very effective solution practical problem.And remaining 40% electric energy does not just need the mode of quick charge to be full of, and only needs normal charging current, and for example the charging current of 500ma is full of.Like this, avoided causing damage because of filling mobile phone batteries for a long time soon.In addition, through the setting of mobile phone software, can also realize filling to the setting of filling the time soon, soon and the selection of trickle charge pattern and switching etc.
In addition, for the cell phone charging circuit that cooperates the utility model better fill function soon, the requirement of mobile phone batteries is: lithium polymer battery; The internal resistance of cell is as far as possible little; Generate heat when preventing large current charge, increase thermistor on the battery, the battery temperature when being used to control charging; If temperature is too high, then stop charging.Requirement to charger: output voltage 5V, output current satisfy the demand of maximum charging current.
Fig. 3 is the circuit diagram of cell phone charging circuit second embodiment of the utility model, and is as shown in Figure 3, and in the present embodiment, inspection leakage resistance unit 150 comprises the inspection leakage resistance 151 of two parallel connections, and the resistance of two inspection leakage resistances 151 is identical.For example, referring to Fig. 1, the resistance of resistance R 405 is 0.2 Ω; In the present embodiment; Can select two resistances to be inspection leakage resistance 151 parallel connections of 0.1 Ω, even it is the charging current of transistor 130 outputs increases to original twice like this, constant in the pressure drop at inspection 150 two ends, leakage resistance unit.
In the present embodiment, all the other situation are identical with first embodiment, repeat no more at this.In other embodiment of the cell phone charging circuit of the utility model, the resistances of two inspection leakage resistances 151 can be selected as the case may be.
Fig. 4 is the circuit diagram of cell phone charging circuit the 3rd embodiment of the utility model; As shown in Figure 4; In the present embodiment; Cell phone charging circuit also comprises the reference voltage port 190 and first electric capacity 200, and reference voltage port 190 is connected with charger voltage input port 110 through first resistance 160, and an end of first electric capacity 200 is connected in node, the other end ground connection of first resistance 160 and reference voltage port 190.In the present embodiment, all the other situation are identical with first embodiment, repeat no more at this.
Fig. 5 is the circuit diagram of cell phone charging circuit the 4th embodiment of the utility model; As shown in Figure 5; In the present embodiment; Cell phone charging circuit comprises that also charger inserts detection port 210, second electric capacity 220, second resistance 230 and the 3rd resistance 240; Charger inserts detection port 210 and is connected with charger voltage input port 110 through second resistance 230, and an end of the 3rd resistance 240 is connected in node, the other end ground connection of second resistance 230 and charger insertion detection port 210, and an end of second electric capacity 220 is connected with charger voltage input port 110, other end ground connection.In the present embodiment, all the other situation are identical with the 4th embodiment, repeat no more at this.
Technical characterictic among each embodiment of the cell phone charging circuit of the utility model can use separately, also can make up use.In concrete implementation process, can carry out suitable improvement to the cell phone charging circuit of the utility model, to adapt to the specific requirement of concrete condition.Therefore be appreciated that the embodiment according to the utility model just plays exemplary role, and be different from the protection range that limits the utility model.
Claims (5)
1. cell phone charging circuit; Comprise charger voltage input port (110), charging current detection port (120) and transistor (130); Wherein, The emitter of said transistor (130) is connected with said charger voltage input port (110), collector electrode is connected with said charging current detection port (120); Said circuit also comprise charging voltage output port (140) and be connected said charging voltage output port (140) and said charging current detection port (120) between inspection leakage resistance unit (150); It is characterized in that; Said inspection leakage resistance unit (150) comprises the inspection leakage resistance (151) of a plurality of parallel connections; Said circuit also comprises first resistance (160), FET (170) and charging current adjustment port (180), wherein, the grid of said FET (170) through said first resistance (160) be connected with said charger voltage input port (110), drain electrode is connected with the base stage of said transistor (130), source electrode is adjusted port (180) with said charging current and is connected.
2. cell phone charging circuit according to claim 1 is characterized in that, the resistance of the inspection leakage resistance (151) of a plurality of parallel connections in the said inspection leakage resistance unit (150) is identical.
3. cell phone charging circuit according to claim 1 and 2 is characterized in that, said inspection leakage resistance unit (150) comprises the inspection leakage resistance (151) of two parallel connections.
4. cell phone charging circuit according to claim 1; It is characterized in that; Said circuit also comprises reference voltage port (190) and first electric capacity (200); Said reference voltage port (190) is connected with said charger voltage input port (110) through said first resistance (160), and an end of said first electric capacity (200) is connected in node, the other end ground connection of said first resistance (160) and said reference voltage port (190).
5. according to claim 1 or 4 described cell phone charging circuits; It is characterized in that; Said circuit comprises that also charger inserts detection port (210), second electric capacity (220), second resistance (230) and the 3rd resistance (240); Said charger inserts detection port (210) and is connected with said charger voltage input port (110) through said second resistance (230); One end of said the 3rd resistance (240) is connected in node, the other end ground connection of said second resistance (230) and said charger insertion detection port (210), and an end of said second electric capacity (220) is connected with said charger voltage input port (110), other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205406028U CN202374008U (en) | 2011-12-21 | 2011-12-21 | Mobile phone charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205406028U CN202374008U (en) | 2011-12-21 | 2011-12-21 | Mobile phone charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202374008U true CN202374008U (en) | 2012-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205406028U Expired - Lifetime CN202374008U (en) | 2011-12-21 | 2011-12-21 | Mobile phone charging circuit |
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| Country | Link |
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| CN (1) | CN202374008U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201737A (en) * | 2014-08-19 | 2014-12-10 | 深圳市乐得瑞科技有限公司 | Quick charge connecting line and quick charge method of portable electronic equipment |
| CN104701940A (en) * | 2015-03-02 | 2015-06-10 | 上海天奕达电子科技有限公司 | Method and device for quickly charging battery of mobile terminal |
| WO2018076623A1 (en) * | 2016-10-26 | 2018-05-03 | 中兴通讯股份有限公司 | Method and device for detecting charging abnormality and power adapter |
-
2011
- 2011-12-21 CN CN2011205406028U patent/CN202374008U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201737A (en) * | 2014-08-19 | 2014-12-10 | 深圳市乐得瑞科技有限公司 | Quick charge connecting line and quick charge method of portable electronic equipment |
| CN104701940A (en) * | 2015-03-02 | 2015-06-10 | 上海天奕达电子科技有限公司 | Method and device for quickly charging battery of mobile terminal |
| WO2018076623A1 (en) * | 2016-10-26 | 2018-05-03 | 中兴通讯股份有限公司 | Method and device for detecting charging abnormality and power adapter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120808 |