CN201781301U - 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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- CN201781301U CN201781301U CN2010202966292U CN201020296629U CN201781301U CN 201781301 U CN201781301 U CN 201781301U CN 2010202966292 U CN2010202966292 U CN 2010202966292U CN 201020296629 U CN201020296629 U CN 201020296629U CN 201781301 U CN201781301 U CN 201781301U
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- leads ends
- charger
- lithium battery
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- vio
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Abstract
The utility model relates to a circuit structure integrated with a battery charger and a direct-current booster, which is provided with a conversion module and a feedback control module; the conversion module comprises a plurality of transistors as switches, the control ends of which are respectively connected with a charging/boosting controller; the feedback control module is connected with the conversion module, and is driven by the charging/boosting input signal received by the feedback control module; under the charging state, an external power supply at the first pin charges a lithium battery at the second pin via the charging/boosting controller in a linear or switching mode; and under the boosting state, the charging/boosting controller controls the lithium battery at the second pin to carry out boost conversion and supply power output higher than the voltage of the battery to a load at the first pin. The utility model 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 utility model relates to a kind of power-supply system of semiconductor integrated circuit, the circuit structure of particularly a kind of integrated battery charger and DC booster.
Background technology
Be being extensive use of of device of power supply along with mobile phone, MP3 and MP4 etc., become more and more important for the power management of those handheld devices with the battery.At present these class handheld devices many by lithium battery as power supply, its output voltage generally at 2.7V to 4.2V; And the transfer of data of handheld devices and signal controlling require supply voltage can be higher than this lithium battery output voltage usually.Therefore, many manufacturers often independently are provided with a battery charger and a DC booster, be embodied as the lithium cell charging of handheld devices respectively and the power supply function that is higher than cell voltage is provided.
As shown in Figure 1, be existing a kind of linear charger of lithium cell charging that is, the external working power of its input VIN, and be connected to Linear Control module 11 and transistor M1 respectively.Lithium battery 12 positive poles are connected with transistor M1 at battery-end VBAT, and output voltage feeds back to Linear Control module 11.Linear Control module 11 is come oxide-semiconductor control transistors M1 conducting degree by the Voltage Feedback of this lithium battery 12, and transistor M1 is carried out current detecting, realizes charging to lithium battery 12 with this.At this moment, lithium battery 12 can be directly for the load that connects provides electrical power, or provide the electrical power that is higher or lower than cell voltage for load by transducer.
As shown in Figure 2, be existing a kind of switching mode charger of lithium cell charging that is, 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 play switch and afterflow effect respectively, and its interconnective node passes through series inductance, and behind battery-end VBAT shunt capacitance, is connected with the positive pole of lithium battery 12.Switch control module 13 is by the Voltage Feedback and the upward detection of charging current of transistor M1 of lithium battery 12, by output PWM (pulsewidth width modulated) signal, conducting and the disconnection of oxide-semiconductor control transistors M1 and M2 realize that the external power supply of input VIN charges to lithium battery 12 respectively; By adjusting the duty ratio of pwm signal, can realize effective control to mean charging current.Compare linear charger shown in Figure 1, this switching mode charger can provide higher charge efficiency, and reduces the quantity of heat given up of charging circuit, thereby more is applicable to the situation of large current charge.
Yet for charger as shown in Figure 1 and Figure 2, it all needs to be connected with DC booster, could provide the power supply that is higher than lithium battery voltage output for handheld devices.Shown in Figure 3, be the circuit block diagram of existing a kind of DC boost converter.If it is connected with Fig. 1, charger shown in Figure 2, promptly connects lithium battery as working power, and load is placed its output VOUT at input VIN.The control module of boosting 17 is by the negative feedback of output VOUT, output pwm signal comes oxide-semiconductor control transistors M1, M2 conducting or disconnection respectively, to be embodied as the energy storage of inductance and electric capacity, or inductance, electric capacity with battery to the load electromotive power output, thereby make output voltage and the electric current that obtains to be higher than input VIN at output VOUT.
As seen, this kind is connected with DC boost converter by battery charger, be respectively battery charge and the power circuit that is higher than cell voltage is provided, more adjunct circuit and discrete component need be set, the circuit structure complexity, increase system cost and volume simultaneously, thereby can not be applicable to handheld devices well.
The utility model content
The purpose of this utility model provides the circuit structure of a kind of integrated battery charger and DC booster, can realize the conversion of battery charge and boost in voltage, reduces adjunct circuit and discrete component, thereby simplied system structure reduces system cost and volume.
In order to achieve the above object, the technical solution of the utility model provides the circuit structure of a kind of integrated battery charger and DC booster, comprises feedback control module, and the modular converter that is connected with described feedback control module; Charging control by described feedback control module detects makes described modular converter work in charging or pressure-increasning state; Described modular converter comprises charger and boost controller and some transistors; These some transistors are as diverter switch, and its control end is connected with described charger and boost controller respectively.
The circuit structure of described integrated battery charger and DC booster also comprises inductance, electric capacity and lithium battery, and is provided with the first leads ends VIO, the second leads ends VBAT; Described inductance is connected between described modular converter and the described second leads ends VBAT, and between described second leads ends VBAT and ground shunt capacitance and lithium battery.
Some described transistor in the described modular converter is arranged between inductance and the described first leads ends VIO; Some described transistors are arranged between inductance and the ground.
Described some transistors also are 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 current detection.
Described charger and boost controller is connected with the second leads ends VBAT with the described first leads ends VIO respectively, and by the detected charging control of described feedback control module, the charging or the operating state of boosting under, respectively with 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, its control is connected with external power source as described first leads ends VIO of working power end, to the lithium cell charging as the second leads ends VBAT of pressure feedback port.
When the described transistor of described charger and boost controller control some of them disconnects, and the Voltage Feedback by the second leads ends VBAT, when controlling other transistor turns, described charger and boost controller is operated in the linear-charging process that the external power supply of the first leads ends VIO is carried out to the lithium battery of the second leads ends VBAT.
When the Voltage Feedback of described charger and boost controller by the second leads ends VBAT, output pwm signal, when controlling some transistorized conductings respectively, described charger and boost controller is operated in the switching mode charging process that the external power supply of the first leads ends VIO is carried out the lithium battery of the second leads ends VBAT.
When the boost signal of described feedback control module is in high potential, described charger and boost controller is operated in the boost conversion state, its control is as the lithium battery of the described second leads ends VBAT of working power end, and the load that connects for the first leads ends VIO as pressure feedback port provides the power supply that is higher than lithium battery voltage output.
Described charger and boost controller is by detecting the load voltage at the first leads ends VIO place, and output pwm signal is controlled some transistorized conductings or disconnection 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 with lithium battery to the load electromotive power output, obtain to be higher than the output voltage of the second leads ends VBAT at the first leads ends VIO with this.
The circuit structure of integrated battery charger described in the utility model and DC booster, compared with prior art, its advantage is:
The utility model detects charging by feedback control module, under charged state, carries out linearity or switching mode charging from the external power supply of the first leads ends VIO to the lithium battery of the second leads ends VBAT by charger and boost controller control; Under pressure-increasning state, charger and boost controller is controlled the lithium battery boost conversion of the second leads ends VBAT, and provide the power supply that is higher than cell voltage output to the load of the first leads ends VIO, realization is integrated to lithium battery charger and DC boost converter, effectively reduced the setting of adjunct circuit and discrete component, simplified the complexity of system, thereby can the reduction system volume, system cost and packaging and testing expense reduced.
And the utility model can be by to the simple deformation of auxiliary circuit, constitute boost, the direct current transducer of step-down or buck, or constitute portable charger, thereby can be widely used in various portable types or non-portable electronic system.
Description of drawings
Fig. 1 is the electrical block diagram of existing linear charger;
Fig. 2 is the electrical block diagram of existing switching mode 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 utility model integrated battery charger and DC booster.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model, solid arrow is represented the input of working power in the accompanying drawing, dotted arrow is represented the input of feedback voltage, dashdotted dovetail arrow is represented the input of current detecting information, and each module of the numeral on the arrow is in which kind of operating state in the following pattern 1,2,3 respectively.
As shown in Figure 4, the circuit structure of the utility model integrated battery charger and DC booster, the modular converter 20 that comprising is used to charge boosts, the feedback control module 21 that is connected with modular converter 20; This modular converter 20 also passes through series inductance 25, and behind the second leads ends VBAT shunt capacitance 26, is connected with the positive pole of lithium battery 12.
Charger and boost controller 22 is connected with the second leads ends VBAT with the first leads ends VIO respectively, by feedback control module 21 detected charging controls, the charging or the operating state of boosting under, respectively with the first leads ends VIO, the second leads ends VBAT as pressure feedback port or working power end.
When external power supply existed, it was connected the working power as charge power supply and charger and boost controller 22 with the first leads ends VIO.At this moment, in the charging 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 can select charging of online property or the work down of switching mode charge mode.
If charger and boost controller 22 is operated in linear-charging pattern (pattern 1), cooperate referring to Fig. 1 and shown in Figure 4, make transistor 24 disconnect all the time, at this moment, the modular converter 20 of dotted portion has constituted the circuit structure of linear charger as shown in Figure 1 among Fig. 4.Charger and boost controller 22 is gone up the Voltage Feedback of lithium battery 12 by the second leads ends VBAT, and transistor 23 carried out current detecting, the conducting of oxide-semiconductor control transistors 23 realizes 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), cooperate referring to Fig. 2 and shown in Figure 4.At this moment, the modular converter 20 of dotted portion has constituted the circuit structure of switching mode charger as shown in Figure 2 among Fig. 4.By receiving the Voltage Feedback that the second leads ends VBAT goes up lithium battery 12, and transistor 23,24 carried out current detecting, charger and boost controller 22 output PWM (pulsewidth width modulated) signals, oxide- semiconductor control transistors 23,24 realizes that in the positive negative cycle conducting at interval of square wave the external power supply of the first leads ends VIO charges to the switching mode that lithium battery 12 carries out respectively; By adjusting the duty ratio of pwm signal, can realize effective control to mean charging current.
Cooperation is referring to Fig. 3 and shown in Figure 4, and when external power supply did not exist, the second leads ends VBAT was connected with the positive pole of lithium battery 12, as the whole system operation power supply.At this moment, the boost signal of feedback control module 21 is placed in high potential, and with the first leads ends VIO as pressure feedback port.When load was connected in the first leads ends VIO, charger and boost controller 22 was operated under the boost mode (mode 3), and promptly the modular converter 20 of dotted portion has constituted DC boost converter as shown in Figure 3 among Fig. 4.
Charger and boost controller 22 is by detecting the load voltage and the load current at the first leads ends VIO place, and output pwm signal comes the conducting or the disconnection of oxide- semiconductor control transistors 23,24 respectively.When transistor 24 conductings, carry out energy storage to inductance 25 and electric capacity 26 electromotive power outputs from the second leads ends VBAT; When transistor 23 conductings, by inductance 25, electric capacity 26 with lithium battery 12 to the load electromotive power output, can obtain be higher than output voltage and the electric current of second leads ends VBAT at the first leads ends VIO this moment, finishes the process of boosting of lithium battery 12.
The utility model detects charging by feedback control module 21, under charged state, carry out linearity or switching mode charging from the external power supply of the first leads ends VIO to the lithium battery 12 of the second leads ends VBAT by charger and boost controller 22 control; Under pressure-increasning state, lithium battery 12 boost conversion of the charger and boost controller 22 controls second leads ends VBAT, and provide the power supply that is higher than cell voltage output to the load of the first leads ends VIO, realization is integrated to lithium battery charger and DC boost converter, effectively reduced the setting of adjunct circuit and discrete component, simplified the complexity of system, thereby can the reduction system volume, system cost and packaging and testing expense reduced.
Simultaneously, the utility model is not limited to the execution mode above-mentioned and charger system that boost converter is integrated.By simple deformation to auxiliary circuit, the utility model can be constituted boost, the direct current transducer of step-down or buck, thereby can be widely used in various portable types or non-portable electronic system.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection range of the present utility model should be limited to the appended claims.
Claims (10)
1. the circuit structure of integrated battery charger and DC booster is characterized in that, comprises feedback control module (21), and the modular converter (20) that is connected with described feedback control module (21); Charging control by described feedback control module (21) detects 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); These some transistors (23,24) are 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 is characterized in that, also comprises inductance (25), electric capacity (26) and lithium battery (12), and is provided with the first leads ends VIO, the second leads ends VBAT; Described inductance (25) is connected between described modular converter (20) and the 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 is characterized in that, the some described transistor (23) in the described modular converter (20) is arranged between inductance (25) and the described first leads ends VIO; Some described transistors (24) are arranged between inductance (25) and the 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) also are 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 current detection.
5. the circuit structure of integrated battery charger as claimed in claim 3 and DC booster, it is characterized in that, described charger and boost controller (22) is connected with the second leads ends VBAT with the described first leads ends VIO respectively, and by the detected charging control of described feedback control module (21), the charging or the operating state of boosting under, respectively with the first leads ends VIO, the second leads ends VBAT as pressure feedback port or working power end.
6. the circuit structure of integrated battery charger as claimed in claim 5 and DC booster, it is characterized in that, when the charging signals of described feedback control module (21) is in high potential, described charger and boost controller (22) is operated in charged state, its control is connected with external power source as described first leads ends VIO of working power end, charges to the lithium battery (12) as the second leads ends VBAT of pressure feedback port.
7. the circuit structure of integrated battery charger as claimed in claim 6 and DC booster, it is characterized in that, controlling described transistor (24) when described charger and boost controller (22) disconnects, and the Voltage Feedback by the second leads ends VBAT, when controlling described transistor (23) conducting, described charger and boost controller (22) is operated in the linear-charging process that the external power supply of the first leads ends VIO is carried out to the lithium battery (12) of the second leads ends VBAT.
8. the circuit structure of integrated battery charger as claimed in claim 6 and DC booster, it is characterized in that, when the Voltage Feedback of described charger and boost controller (22) by the second leads ends VBAT, output pwm signal, when controlling the conducting of some transistors (23,24) respectively, described charger and boost controller (22) is operated in the switching mode charging process that the external power supply of the first leads ends VIO is carried out the lithium battery (12) of the second leads ends VBAT.
9. the circuit structure of integrated battery charger as claimed in claim 5 and DC booster, it is characterized in that, when the boost signal of described feedback control module (21) is in high potential, described charger and boost controller (22) is operated in the boost conversion state, its control is as the lithium battery (12) of the described second leads ends VBAT of working power end, and the load that connects for the first leads ends VIO as pressure feedback port provides the power supply that is higher than lithium battery (12) voltage output.
10. the circuit structure of integrated battery charger as claimed in claim 9 and DC booster, it is characterized in that, described charger and boost controller (22) is by detecting the load voltage at the first leads ends VIO place, output pwm signal is controlled the conducting or the disconnection of some transistors (23,24) respectively, makes the lithium battery (12) of the second leads ends VBAT carry out energy storage to inductance (25) and electric capacity (26) electromotive power output; Or make inductance (25), electric capacity (26) with lithium battery (12) to the load electromotive power output, obtain to be higher than the output voltage of the second leads ends VBAT at the first leads ends VIO with this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202966292U CN201781301U (en) | 2010-08-19 | 2010-08-19 | Circuit structure integrated with battery charger and direct-current booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202966292U CN201781301U (en) | 2010-08-19 | 2010-08-19 | Circuit structure integrated with battery charger and direct-current booster |
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| Publication Number | Publication Date |
|---|---|
| CN201781301U true CN201781301U (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202966292U Expired - Lifetime CN201781301U (en) | 2010-08-19 | 2010-08-19 | Circuit structure integrated with battery charger and direct-current booster |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415978A (en) * | 2011-03-11 | 2013-11-27 | 罗伯特·博世有限公司 | Charging device with safety shutdown |
-
2010
- 2010-08-19 CN CN2010202966292U patent/CN201781301U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103415978A (en) * | 2011-03-11 | 2013-11-27 | 罗伯特·博世有限公司 | Charging device with safety shutdown |
| CN103415978B (en) * | 2011-03-11 | 2016-11-09 | 罗伯特·博世有限公司 | There is the charging device of safe shutdown device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GIANTEC SEMICONDUCTOR, INC. Free format text: FORMER OWNER: MAXLLENT CORP. Effective date: 20111021 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20111021 Address after: Songtao Lu Pudong New Area Zhangjiang hi tech park Shanghai 201203 Lane 647 No. 12 Patentee after: Giantec Semiconductor Inc. Address before: 201203 Shanghai city Pudong New Area road 887 Lane 72 Zuchongzhi Room 201 No. Patentee before: Meiling Microelectronics (Shanghai) Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201203 No. 12, Lane 647, Songtao Road, Shanghai China (Shanghai) Free Trade Pilot Area, Pudong New Area, Shanghai Patentee after: Juchen Semiconductor Co., Ltd. Address before: 201203 No. 12, Lane 647, Songtao Road, Zhangjiang High-tech Park, Pudong New Area, Shanghai Patentee before: Giantec Semiconductor Inc. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110330 |