CN104979873A - Circuit structure integrated with battery charger and direct-current booster - Google Patents
Circuit structure integrated with battery charger and direct-current booster Download PDFInfo
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- CN104979873A CN104979873A CN201510398165.3A CN201510398165A CN104979873A CN 104979873 A CN104979873 A CN 104979873A CN 201510398165 A CN201510398165 A CN 201510398165A CN 104979873 A CN104979873 A CN 104979873A
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- charger
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Abstract
The invention relates to a circuit structure integrated with a battery charger and a direct-current booster. The circuit structure comprises a conversion module and a feedback control module connected with the conversion module. The conversion module comprises a plurality of transistors as switches. The control ends of the transistors are respectively connected with a charging/boosting controller. The feedback control module is driven by a received charging/boosting input signal. In the charging state, an external power supply at a first pin charges a lithium battery at a second pin via the charging/boosting controller in the linear or switching manner. In the boosting state, the charging/boosting controller controls the lithium battery at the second pin to carry out the boosting conversion and supply power output higher than the voltage of the battery to a load at the first pin. The circuit structure realizes the integration of the lithium battery charger and the direct-current boost converter, effectively reduces the arrangement of additional circuits and discrete components, simplifies the complexity of a system, reduces the size of the system, and decreases the cost of the system and packaging test.
Description
Technical field
The application relates to a kind of power-supply system of semiconductor integrated circuit, particularly the circuit structure of a kind of integrated battery charger and DC booster.
Background technology
Along with mobile phone, MP3 and MP4 etc. take battery as widely using of the device of power supply, the power management for those handheld devices becomes more and more important.Current this kind of handheld devices many by lithium battery as power supply, its output voltage is generally at 2.7V to 4.2V; And the transfer of data of handheld devices and signal controlling require that power electric pressure energy is higher than this lithium battery output voltage usually.Therefore, many manufacturers are often independently provided with a battery charger and a DC booster, are embodied as the lithium cell charging of handheld devices respectively, and provide the power supply function higher than cell voltage.
As shown in Figure 1, be existing a kind of linear charger for lithium cell charging, the external working power of its input VIN, and be connected to Linear Control module 11 and transistor M1 respectively.Lithium battery 12 positive pole is connected with transistor M1 at battery-end VBAT, and output voltage feeds back to Linear Control module 11.Linear Control module 11 controls transistor M1 conducting degree by the Voltage Feedback of this lithium battery 12, and carries out current detecting to transistor M1, realizes the charging to lithium battery 12 with this.Now, lithium battery 12 can directly for the load connected provides electrical power, or by transducer for load provides electrical power higher or lower than cell voltage.
As shown in Figure 2, be existing a kind of switching type charger for lithium cell charging, the external working power of its input VIN, and be connected to switch control module 13 and transistor M1 respectively.Transistor M1 and transistor M2 plays switch and afterflow effect respectively, and its interconnective node by series inductance, and after battery-end VBAT shunt capacitance, is connected with the positive pole of lithium battery 12.Switch control module 13 is by the detection of charging current on the Voltage Feedback of lithium battery 12 and transistor M1, by exporting PWM (pulsewidth width modulated) signal, control conducting and the disconnection of transistor M1 and M2 respectively, the external power supply realizing input VIN charges to lithium battery 12; By adjusting the duty ratio of pwm signal, the effective control to mean charging current can be realized.Compare linear charger shown in Fig. 1, this switching type charger can provide higher charge efficiency, and reduces the quantity of heat given up of charging circuit, is thus more suitable for the situation of large current charge.
But for charger as shown in Figure 1 and Figure 2, it all needs to be connected with DC booster, the power supply higher than lithium battery voltage could be provided to export for handheld devices.Shown in Fig. 3, it is the circuit block diagram of existing a kind of DC boost converter.If charger is connected shown in its with Fig. 1, Fig. 2, namely connects lithium battery as working power at input VIN, and load is placed in its output VOUT.Boosting rectifier control module 17 is by the negative feedback of output VOUT, output pwm signal controls transistor M1, M2 respectively and is turned on or off, to be embodied as the energy storage of inductance and electric capacity, or inductance, electric capacity to load electromotive power output, thus make to obtain higher than the output voltage of input VIN and electric current at output VOUT together with battery.
Visible, this kind is connected with DC boost converter by battery charger, be respectively battery charging and the power circuit higher than cell voltage is provided, need to arrange more adjunct circuit and discrete component, circuit structure is complicated, add system cost and volume simultaneously, thus can not be applicable to handheld devices well.
Summary of the invention
The object of the application is to provide the circuit structure of a kind of integrated battery charger and DC booster, can realize the conversion of battery charging and boost in voltage, reduce adjunct circuit and discrete component, thus simplied system structure, reduce system cost and volume.
In order to achieve the above object, the technical scheme of the application is to provide the circuit structure of a kind of integrated battery charger and DC booster, comprises feedback control module, and the modular converter be connected with described feedback control module; The charging/boosting input signal detected by described feedback control module controls, and makes described modular converter work in charging or pressure-increasning state; Described modular converter comprises charger and boost controller and some transistors; This some transistor is as diverter switch, and its control end is connected with described charger and boost controller respectively.
Described integrated battery charger and the circuit structure of DC booster, also comprise inductance, electric capacity and lithium battery, and be provided with the first leads ends VIO, the second leads ends VBAT; Described inductance is connected between described modular converter and described second leads ends VBAT, and between described second leads ends VBAT and ground shunt capacitance and lithium battery.
Some described transistor in described modular converter is arranged between inductance and described first leads ends VIO; Some described transistors are arranged between inductance and ground.
Described some transistors are also respectively equipped with lead-in wire and are connected with described charger and boost controller, to the data of described charger and boost controller output electric current measure.
Described charger and boost controller is connected with described first leads ends VIO and the second leads ends VBAT respectively, and the charging/boosting input signal detected by described feedback control module controls, charging or boosting operating state under, respectively using the first leads ends VIO, the second leads ends VBAT as pressure feedback port or working power end.
When the charging signals of described feedback control module is in high potential, described charger and boost controller is operated in charged state, it controls to be connected with external power source, to the lithium cell charging of the second leads ends VBAT as pressure feedback port as the described first leads ends VIO of working power end.
Disconnect when described charger and boost controller controls transistor described in some of them, and pass through the Voltage Feedback of the second leads ends VBAT, when controlling other transistor turns, described charger and boost controller is operated in the linear-charging process of being carried out to the lithium battery of the second leads ends VBAT by the external power supply of the first leads ends VIO.
When described charger and boost controller is by the Voltage Feedback of the second leads ends VBAT, output pwm signal, when controlling the conducting of some transistors respectively, described charger and boost controller is operated in the switching mode charging process of being carried out the lithium battery of the second leads ends VBAT by the external power supply of the first leads ends VIO.
When the boost signal of described feedback control module is in high potential, described charger and boost controller is operated in boost conversion state, it controls the lithium battery as the described second leads ends VBAT of working power end, for the load connected as the first leads ends VIO of pressure feedback port provides the power supply higher than lithium battery voltage to export.
Described charger and boost controller is by the load voltage at detection first leads ends VIO place, and output pwm signal controls being turned on or off of some transistors respectively, makes the lithium battery of the second leads ends VBAT carry out energy storage to inductance and electric capacity electromotive power output; Or make inductance, electric capacity to load electromotive power output together with lithium battery, with this at the output voltage of the first leads ends VIO acquisition higher than the second leads ends VBAT.
The circuit structure of integrated battery charger and DC booster described in the application, compared with prior art, its advantage is:
The application detects charging/boosting input signal by feedback control module, in the charge state, carries out linear or switching mode charging by the charger and boost controller lithium battery controlled from the external power supply of the first leads ends VIO to the second leads ends VBAT; Under pressure-increasning state, charger and boost controller controls the lithium battery boost conversion of the second leads ends VBAT, and provide the power supply higher than cell voltage to export to the load of the first leads ends VIO, realize to lithium battery charger and DC boost converter integrated, effectively reduce the setting of adjunct circuit and discrete component, simplify the complexity of system, thus can reduction system volume, reduce system cost and packaging and testing expense.
And the application can by simple deformation to auxiliary circuit, form the direct current transducer of boosting, step-down or buck, or form portable charger, thus can be widely used in the electronic system of various portable type or non-portable formula.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of existing linear charger;
Fig. 2 is the electrical block diagram of existing switching type charger;
Fig. 3 is the electrical block diagram of existing DC boost converter;
Fig. 4 is the schematic diagram of the circuit structure of the application's integrated battery charger and DC booster.
Embodiment
The embodiment of the application is described below in conjunction with accompanying drawing, in accompanying drawing, solid arrow represents the input of working power, dotted arrow represents the input of feedback voltage, dashdotted dovetail arrow represents the input of current detecting information, and each module of the numeral on arrow is in which kind of operating state in following pattern 1,2,3 respectively.
As shown in Figure 4, the circuit structure of the application's integrated battery charger and DC booster, comprises for the modular converter 20 of charging pressure-boosting, the feedback control module 21 that is connected with modular converter 20; This modular converter 20 also by series inductance 25, and after the second leads ends VBAT shunt capacitance 26, is connected with the positive pole of lithium battery 12.
Modular converter 20 comprises charger and boost controller 22 and two transistors 23,24, these two transistors 23,24 are as diverter switch, its control end is connected with charger and boost controller 22 respectively, is separately respectively equipped with lead-in wire and is connected with charger and boost controller 22 and carries out current detecting.Transistor 23 1 termination first leads ends VIO, transistor 24 one end ground connection; Two transistor 23,24 other end is connected with inductance 25 after being connected.
Charger and boost controller 22 is connected with the first leads ends VIO and the second leads ends VBAT respectively, the charging/boosting input signal detected by feedback control module 21 controls, charging or boosting operating state under, respectively using the first leads ends VIO, the second leads ends VBAT as pressure feedback port or working power end.
When external power supply exists, it is connected the working power as charge power supply and charger and boost controller 22 with the first leads ends VIO.Now, in the charging/boosting input signal that feedback control module 21 receives, charging signals is in high potential, causes charger and boost controller 22 to receive the Voltage Feedback of lithium battery 12 from the second leads ends VBAT, and online property can be selected to charge or work under switching mode charge mode.
If charger and boost controller 22 is operated in linear charge mode (pattern 1), coordinate see shown in Fig. 1 and Fig. 4, make transistor 24 disconnect all the time, now, in Fig. 4, the modular converter 20 of dotted portion constitutes the circuit structure of linear charger as shown in Figure 1.Charger and boost controller 22 is by the Voltage Feedback of lithium battery 12 on the second leads ends VBAT, and current detecting is carried out to transistor 23, control the conducting of transistor 23, realize the external power supply of the first leads ends VIO with this, to the linear-charging process of the lithium battery 12 of the second leads ends VBAT.
If charger and boost controller 22 is operated in switching mode charge mode (pattern 2), coordinate see shown in Fig. 2 and Fig. 4.Now, in Fig. 4, the modular converter 20 of dotted portion constitutes the circuit structure of switching type charger as shown in Figure 2.By receiving the Voltage Feedback of lithium battery 12 on the second leads ends VBAT, and current detecting is carried out to transistor 23,24, charger and boost controller 22 exports PWM (pulsewidth width modulated) signal, control the positive and negative period distances conducting of transistor 23,24 at square wave respectively, the switching mode charging that the external power supply realizing the first leads ends VIO carries out lithium battery 12; By adjusting the duty ratio of pwm signal, the effective control to mean charging current can be realized.
Coordinate see shown in Fig. 3 and Fig. 4, when external power supply does not exist, the second leads ends VBAT is connected with the positive pole of lithium battery 12, as the working power of whole system.Now, the boost signal of feedback control module 21 is placed in high potential, and using the first leads ends VIO as pressure feedback port.When load is connected to the first leads ends VIO, under charger and boost controller 22 is operated in boost mode (mode 3), namely in Fig. 4, the modular converter 20 of dotted portion constitutes DC boost converter as shown in Figure 3.
Charger and boost controller 22 passes through load voltage and the load current at detection first leads ends VIO place, and output pwm signal controls being turned on or off of transistor 23,24 respectively.Energy storage is carried out from the second leads ends VBAT to inductance 25 and electric capacity 26 electromotive power output when transistor 24 conducting; When transistor 23 conducting, by inductance 25, electric capacity 26 together with lithium battery 12 to load electromotive power output, now can obtain output voltage higher than the second leads ends VBAT and electric current at the first leads ends VIO, complete the boost process of lithium battery 12.
The application detects charging/boosting input signal by feedback control module 21, in the charge state, carries out linear or switching mode charging by charger and boost controller 22 lithium battery 12 controlled from the external power supply of the first leads ends VIO to the second leads ends VBAT; Under pressure-increasning state, charger and boost controller 22 controls lithium battery 12 boost conversion of the second leads ends VBAT, and provide the power supply higher than cell voltage to export to the load of the first leads ends VIO, realize to lithium battery charger and DC boost converter integrated, effectively reduce the setting of adjunct circuit and discrete component, simplify the complexity of system, thus can reduction system volume, reduce system cost and packaging and testing expense.
Meanwhile, the application is not limited to the execution mode of the above-mentioned charger system integrated with boost converter.By the simple deformation to auxiliary circuit, the application can be formed the direct current transducer of boosting, step-down or buck, thus can be widely used in the electronic system of various portable type or non-portable formula.
Claims (4)
1. a circuit structure for integrated battery charger and DC booster, is characterized in that, comprises feedback control module (21), and the modular converter (20) be connected with described feedback control module (21); The charging/boosting input signal detected by described feedback control module (21) controls, and makes described modular converter (20) work in charging or pressure-increasning state; Described modular converter (20) comprises charger and boost controller (22) and some transistors (23,24); This some transistor (23,24) is as diverter switch, and its control end is connected with described charger and boost controller (22) respectively.
2. the circuit structure of integrated battery charger as claimed in claim 1 and DC booster, it is characterized in that, also comprise inductance (25), electric capacity (26) and lithium battery (12), and be provided with the first leads ends VI0, the second leads ends VBAT; Described inductance (25) is connected between described modular converter (20) and described second leads ends VBAT, and between described second leads ends VBAT and ground shunt capacitance (26) and lithium battery (12).
3. the circuit structure of integrated battery charger as claimed in claim 2 and DC booster, it is characterized in that, the some described transistor (23) in described modular converter (20) is arranged between inductance (25) and described first leads ends VI0; Some described transistors (24) are arranged between inductance (25) and ground.
4. the circuit structure of integrated battery charger as claimed in claim 3 and DC booster, it is characterized in that, described some transistors (23,24) are also respectively equipped with lead-in wire and are connected with described charger and boost controller (22), to the data of described charger and boost controller (22) output electric current measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398165.3A CN104979873A (en) | 2015-06-30 | 2015-06-30 | Circuit structure integrated with battery charger and direct-current booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510398165.3A CN104979873A (en) | 2015-06-30 | 2015-06-30 | Circuit structure integrated with battery charger and direct-current booster |
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| CN104979873A true CN104979873A (en) | 2015-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510398165.3A Pending CN104979873A (en) | 2015-06-30 | 2015-06-30 | Circuit structure integrated with battery charger and direct-current booster |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834653A (en) * | 2017-11-28 | 2018-03-23 | 维沃移动通信有限公司 | The battery control circuit and mobile terminal of a kind of mobile terminal |
| CN114683955A (en) * | 2022-04-08 | 2022-07-01 | 重庆金康赛力斯新能源汽车设计院有限公司 | Boost control device and method and related equipment |
| CN115085314A (en) * | 2022-06-24 | 2022-09-20 | 上海南麟电子股份有限公司 | Asynchronous boosting and charging control circuit, chip, system and method for battery |
-
2015
- 2015-06-30 CN CN201510398165.3A patent/CN104979873A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834653A (en) * | 2017-11-28 | 2018-03-23 | 维沃移动通信有限公司 | The battery control circuit and mobile terminal of a kind of mobile terminal |
| CN114683955A (en) * | 2022-04-08 | 2022-07-01 | 重庆金康赛力斯新能源汽车设计院有限公司 | Boost control device and method and related equipment |
| CN114683955B (en) * | 2022-04-08 | 2024-04-19 | 重庆金康赛力斯新能源汽车设计院有限公司 | Boost control device, method and related equipment |
| CN115085314A (en) * | 2022-06-24 | 2022-09-20 | 上海南麟电子股份有限公司 | Asynchronous boosting and charging control circuit, chip, system and method for battery |
| CN115085314B (en) * | 2022-06-24 | 2023-07-18 | 上海南麟电子股份有限公司 | Asynchronous boost charging control circuit, chip, system and method for battery |
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Addressee: Dan Yunfeng Document name: Notification of Publication of the Application for Invention |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151014 |
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