CN100401616C - Plower supply managing circuit for battery power supply device - Google Patents
Plower supply managing circuit for battery power supply device Download PDFInfo
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- CN100401616C CN100401616C CNB2004100287169A CN200410028716A CN100401616C CN 100401616 C CN100401616 C CN 100401616C CN B2004100287169 A CNB2004100287169 A CN B2004100287169A CN 200410028716 A CN200410028716 A CN 200410028716A CN 100401616 C CN100401616 C CN 100401616C
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Abstract
The present invention relates to a power managing circuit for portable electronic equipment, which comprises an external AC or DC accommodator. The accommodator receives the back coupling data which are from a charge controller of the portable equipment. The back coupling data comprise the requirements of the electric current and the battery voltage of the battery charging and the power requirements of the portable equipment. The external AC or DC accommodator adjusts the direct current output by use of the back coupling data to satisfy the requirement of the battery charging and the power requirement of the portable equipment.
Description
Technical field
The present invention relates to the power management of battery supply set, relate to a kind of electric power management circuit more specifically, it comprises external ac/dc (AC/DC) adapter by the battery charge controller control of portable set.
Background technology
Present battery charger can be divided into two kinds of independent design and implementation: exchange (AC) adapter and battery charger.
Exchange (AC) adapter two kinds of designs arranged at present:
The low-cost transformer of 1) 60 a hertz-band full-wave rectifier and a filter capacitors.The coil of common transformer has high impedance makes it become constant current source surely.
2) frequency of interchange (AC) adapter of high-frequency-conduct travelling version is usually greater than 100 KHz.Electric resistance impedance is the direct function (X of frequency
L=2 π f L and Xc=1/2 π f C), simultaneously the big more inductance L of frequency and capacitor C are just more little when impedance phase.For example, the inductor size ratio of 600,000 hertz and 60 hertz correspondences of frequency is 60/60,000 or 1/10,000=0.0001.The interchange of this travelling version (AC) adapter adopts high-frequency switched-mode power supply supply (SMPS, Switch ModePower Supply) design, its advantage is that size is little, in light weight, is subjected to very much traveller's favor, but its cost is than the adapter height of other type.
The most adapter that uses comprises the pulse-width modulation PWM circuit and produces the controller (this controller comprises mains switch and DC-DC converter circuit, and this DC-DC converter circuit can be the converter circuit of voltage-dropping type, flyback type, booster type, bridge-type or other type) of a scalable output at present.
The battery charger of (for example notebook, mobile phone and personal digital assistant PDA) all is used for controlling the power division of battery charge and/or system usually in the system.Battery charger has 3 kinds of common designs usually:
1) simple switch adaptor charge device adopts a single electron switch that adapter is directly connected to battery.Then, when reaching final charging voltage, turn-off this switch.Although such charger circuit cost is relatively cheap, it needs a constant current to exchange (AC) adapter (its frequency is 60 hertz usually, and very heavy).This battery charge scheme is very compromise, and long, the most charging of its charging interval is discontented, its use only limits to several chemical cells such as lithium (LiIon) battery, ni-mh (NiMH) battery and NI-G (NiCd) battery.
2) linear regulator-linear regulator is by producing a fixedly output voltage to too much input voltage consumption on regulating element.This causes its efficient usually only is 50% or lower.Used up power is dispersed in the adjuster, thereby has increased the temperature in the small sized product that closely links to each other with adjuster.These used up power have shortened most important battery life for the portable product user greatly in addition.The advantage of linear regulator be simple and cost low, lack and the internal temperature height but its shortcoming is a battery life.
3) switch mode regulator-as mentioned above, this method adopt the switched-mode power supply supply input voltage efficiently (90%-95%) convert battery charging voltage to.Optimum charging scheme can obtain by constant-current mode is switched to constant-voltage mode.The advantage of this type design is that charging is fast, efficient is high, be applicable to various adapters and chemical cell, but its shortcoming is that cost is than linear regulator height.
Shown in Figure 1 is a kind of conventional power source management circuit that is used for portable set.Portable set 10 comprises one or more batteries 30, the one or more active systems 18,20 and/or 22 that link to each other with an AC/DC adapter 12.Adapter 12 transmission may command power charge the battery and give coupled system's power supply.According to battery charge for example, cell voltage and/or from the available horsepower of adapter 12, battery charger circuit 14 provides scalable power (voltage and/or electric current) to give battery 30.It shown in Figure 1A the block diagram of conventional batteries charger circuit 14.One skilled in the art will appreciate that charger generally includes the error amplifier 34 of a plurality of monitoring cell voltages and/or electric current, if cell voltage and/or electric current surpass a certain predetermined threshold value, this error amplifier just produces an error signal.In addition, an error amplifier also is used for monitoring the availability of input power, if from the available horsepower surplus of adapter 12, this error amplifier just produces an error signal.Battery charger circuit 14 also comprises a PWM generator and controller 36.Controller 36 receives the error signal that error amplifier produces, thereby adjusts the duty ratio of PWM generator.This pwm signal is provided for mains switch and DC-DC converter 38, thereby produces a scalable DC source that is used for battery charge.
Similarly, ac/dc (AC/DC) adapter 12 comprises a PWM generator and controller, also comprises mains switch and DC-DC converter that a scalable out-put supply is provided.Because adapter 12 and battery charger circuit 14 all comprise a PWM generator and controller and mains switch and DC-DC converter, just exist and repeat.
Summary of the invention
Therefore, the invention provides a kind of electric power management circuit, it comprises external ac/dc (AC/DC) adapter by battery charge controller control.In this one exemplary embodiment, this charge controller comprises the error amplifier that produces a feedback control signal, and this ac/dc (AC/DC) adapter receives the duty ratio that this feedback control signal is adjusted its PWM generator simultaneously.In the present embodiment, no longer need PWM generator and controller and mains switch and DC-DC converter in the charger circuit, thereby simplified electric power management circuit, also the heat in the conventional batteries charger circuit is produced part simultaneously and move on to external AC/DC adapter.
Comprise a portable electric appts and the electric power management circuit that is used for this equipment in system's one exemplary embodiment; This portable electric appts comprises a rechargeable battery and a charge controller; This charge controller comprises the circuit of the feedback signal that produces an expression cell voltage and/or battery charge.This electric power management circuit also comprises external ac/dc (AC/DC) adapter by a DC source signal of alternating current source generation, and this adapter comprises PWM generator and the controller that produces a pulse-width modulation PWM signal.This controller receiving feedback signals is also adjusted the duty ratio of pwm signal, thereby adjusts DC source voltage of signals and/or current value.
In other example embodiment, the invention provides a kind of ac/dc (AC/DC) adapter, this adapter comprises: a PWM generator that produces a pwm signal, the controller of the feedback signal that reception is produced by the external portable electronic equipment, a DC-DC converter circuit that produces a DC source signal.This controller is adjusted the duty ratio of pwm signal according to feedback signal, thereby adjusts DC source voltage of signals and/or current value.
What be worth those skilled in the art's attention is that though following detailed is based on most preferred embodiment and the using method thereof that provides, the present invention is not limited only to these embodiment and using method.On the contrary, the scope that the present invention relates to is extensive, and its scope is only required to limit by respective right.
Description of drawings
Shown in Figure 1 is a kind of block diagram of conventional power source management circuit;
It shown in Figure 1A a kind of block diagram of conventional batteries charger circuit;
Shown in Figure 2 is the block diagram of an exemplary electric power management circuit of the present invention;
It shown in Fig. 3 A, 3B and the 3C block diagram of exemplary ac/dc AC/DC adapter of the present invention.
Embodiment
Shown in Figure 2 is the block diagram of an exemplary electric power management circuit of the present invention.The same with conventional power source management circuit shown in Figure 1, circuit shown in Figure 2 comprises the system 10 by 32 power supplies of ac/dc (AC/DC) adapter.Yet in the present embodiment, adapter 32 can receive the one or more feedback control signals by the error amplifier generation of charger.Therefore, only need charger to comprise error amplifier in the present embodiment, this also extends to a charge controller 24.Charge controller 24 comprises the error amplifier of a plurality of monitoring cell voltages and/or electric current, if cell voltage and/or electric current surpass a certain predetermined threshold value, error amplifier just produces an error signal.In addition, this error amplifier also is used for monitoring the availability of input power, and produces an error signal according to the battery charge demand that conforms to the power demand of active system.At this, these error signals are generally defined as feedback control signal 26, and it is used for adjusting the duty ratio of PWM generator.It is being in the U.S. Patent application of " voltage mode high accuracy battery charger ", application number 09/948,828, the existing patent No. 6,498,461 by the title that transfers same assignee, is hereby incorporated by reference that a kind of battery charger circuit also discloses.6,498, the feedback control signal that produces in 461 patents is represented cell voltage, battery charge and from the available horsepower of DC source, thereby its duty ratio adjustment of adjusting PWM generator sends the power of battery to.Other charging circuit well known in the art and all these battery chargers are all thought the replaceable equivalent circuit of charge controller 24 of the present invention.
As mentioned above, a kind of switched-mode power supply supply (SMPS) ac/dc (AC/DC) adapter comprises: pwm circuit (generator and controller), the DC-DC converter in a mains switch and a Constant Direct Current source of generation.In this one exemplary embodiment, the PWM controller of ac/dc (AC/DC) adapter receives the feedback information of charge controller 24 generations and adjusts direct current output.
It shown in Fig. 3 A, 3B and the 3C exemplary communication circuit diagram of simplifying communication between the charge controller 24 of portable system 10 and the adapter of the present invention 32.In Fig. 3 A, adapter 32 ' comprises a serial communication interface 35 (for example RS232, RS434, metal wire and USB etc.), and interface 35 receives a serial feedback control signal 26 ' that is produced by charge controller.In the present embodiment, send adapter 32 ' to after the feedback control signal of charge controller generation is converted into the serial communication data.In Fig. 3 B, feedback control signal 26 " be the analog signal that produces by error amplifier, corresponding, adapter 32 " comprise a suitable analog interface (for example buffer).Fig. 3 C adopts an independently control signal wire, but with feedback signal 26 ' " be modulated on the power line.In the present embodiment, adapter 32 ' " and system 10 ' all adopt modulation/demodulation circuit (42 and 44) to be created in the feedback signal of transmitting on the power line 26 ' ".
Therefore, electric power management circuit provided by the invention has been got rid of the needs to the power circuit in the conventional batteries charger circuit, but the power circuit in employing ac/dc of the present invention (AC/DC) adapter, thereby produce scalable, may command power charges the battery and/or give powering portable devices.Advantageously, the power consumption of the cost of mains switch and equipment is all subdued.The cost of pilot controller is also subdued.Because no longer need the mains switch of large volume, also saved the printed circuit board space in the equipment.In addition, adopt the optimal charge scheme can shorten the battery charge time that is full of that reaches.Those skilled in the art will know many improvement of the present invention, and it all is conspicuous that all these improve those skilled in the art, all thinks all to be subject to claim of the present invention within spirit of the present invention.
Claims (15)
1. the electric power management circuit of a portable electric appts, it comprises:
A portable electric appts, described portable electric appts comprise a rechargeable battery and a charge controller, and described charge controller comprises the circuit of the feedback signal that produces an expression battery charge power;
An external AC/DC adapter that produces a DC source signal by an alternating current source, described external AC/DC adapter comprises the PWM generator and the controller that receives described feedback signal that produce a pulse-width modulation PWM signal, thereby described controller is adjusted the power that the duty ratio of described pwm signal is adjusted described DC source signal, wherein in described external AC/DC adapter and described charge controller, only described external AC/DC adapter comprises described PWM generator.
2. the electric power management circuit of portable electric appts according to claim 1, wherein said portable electric appts also comprises a serial data interface, described feedback signal is a serial data, and described external AC/DC adapter also comprises a serial communication interface that receives described serial data.
3. the electric power management circuit of portable electric appts according to claim 1, wherein said feedback signal comprises an analog signal.
4. the electric power management circuit of portable electric appts according to claim 1, described portable electric appts comprises also described feedback signal is modulated to modulation circuit on the described DC source signal that described external AC/DC adapter also comprises the demodulator circuit of the described feedback signal of demodulation that is connected with described DC source signal.
5. the electric power management circuit of portable electric appts according to claim 1, wherein said charge controller also comprise the circuit of the feedback signal of the power demand that produces a described portable electric appts of expression and battery charge.
6. electronic equipment, it comprises:
A controller, described controller produce the feedback signal of the power condition of a described electronic equipment of expression;
An adapter, described adapter respond the output direct current signal of described feedback signal adjustment from it, and wherein in described adapter and described controller, only described adapter comprises a PWM generator.
7. electronic equipment according to claim 6 also comprises a rechargeable battery; Wherein under a kind of battery charge supplying mode, described controller provides described output direct current signal from described adapter to described rechargeable battery.
8. electronic equipment according to claim 6, wherein said controller comprises at least one error amplifier, described error amplifier is signal and a corresponding threshold level of the described power condition of a described electronic equipment of expression relatively, and wherein said controller provides described feedback signal according to the difference of described power condition and corresponding threshold level.
9. electronic equipment according to claim 6, wherein said controller comprise a serial data interface, and described feedback signal comprises a serial data signal.
10. electronic equipment according to claim 6, wherein said controller comprise an analog interface, and described feedback signal comprises an analog signal.
11. electronic equipment according to claim 6, described controller comprise described feedback signal is modulated to modulation circuit on the described output direct current signal.
12. electronic equipment according to claim 6, the described power condition of described electronic equipment are the power condition of a rechargeable battery of described electronic equipment.
13. electronic equipment according to claim 12, the described power condition of described rechargeable battery are battery voltage.
14. electronic equipment according to claim 12, the described power condition of described rechargeable battery are battery charge level.
15. electronic equipment according to claim 6, the power demand of at least one active system that the described power condition of described electronic equipment is described electronic equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100287169A CN100401616C (en) | 2004-03-17 | 2004-03-17 | Plower supply managing circuit for battery power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100287169A CN100401616C (en) | 2004-03-17 | 2004-03-17 | Plower supply managing circuit for battery power supply device |
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| Publication Number | Publication Date |
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| CN1592029A CN1592029A (en) | 2005-03-09 |
| CN100401616C true CN100401616C (en) | 2008-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100287169A Expired - Lifetime CN100401616C (en) | 2004-03-17 | 2004-03-17 | Plower supply managing circuit for battery power supply device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839397B (en) * | 2009-03-20 | 2011-11-16 | 凹凸电子（武汉）有限公司 | Portable lighting device and method for supplying power to load circuit |
| US8508142B2 (en) | 2009-03-20 | 2013-08-13 | O2Micro Inc. | Portable lighting device and method thereof |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110121653A1 (en) * | 2005-02-18 | 2011-05-26 | O2Micro International Limited | Parallel powering of portable electrical devices |
| TWI336550B (en) * | 2006-09-13 | 2011-01-21 | O2Micro Int Ltd | Adapter, with power allocation control, adapter controller, power supply system and electronic device |
| CN100413176C (en) * | 2006-10-11 | 2008-08-20 | 何岳明 | Switching circuit of AC/DC bi service electric tool |
| CN101163293B (en) * | 2006-11-24 | 2010-06-09 | 中兴通讯股份有限公司 | Microcontroller based mobile communication power source management control system |
| CN102437623B (en) * | 2010-09-29 | 2014-07-02 | 联想(北京)有限公司 | Adapter, terminal device, USB (universal serial bus) connection device and charging base station |
| WO2014173262A1 (en) | 2013-04-22 | 2014-10-30 | Mediatek Inc. | Method for communicating electronic apparatus with adaptor via specific communication interface to adjust operation behavior of adaptor, electronic apparatus, and corresponding adaptor |
| CN104810873B (en) | 2014-01-28 | 2018-03-16 | 广东欧珀移动通信有限公司 | Electronic equipment battery charge controller and method |
| WO2015113461A1 (en) | 2014-01-28 | 2015-08-06 | 广东欧珀移动通信有限公司 | Power adapter and terminal |
| CN106329688B (en) * | 2014-01-28 | 2019-09-27 | Oppo广东移动通信有限公司 | Electronic equipment and its power supply adaptor |
| CN104606785B (en) * | 2015-01-23 | 2017-10-10 | 深圳市科曼医疗设备有限公司 | The control method of defibrillation monitor |
| US10291073B2 (en) * | 2016-06-13 | 2019-05-14 | Qualcomm Incorporated | Devices and methods for controlling transmitter power supply based on wireless receiver request |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572110A (en) * | 1994-12-15 | 1996-11-05 | Intel Corporation | Smart battery charger system |
| US5684382A (en) * | 1996-07-19 | 1997-11-04 | Compaq Computer Corporation | Control of computer AC adapter output voltage via battery pack feedback |
| US6498461B1 (en) * | 2001-08-17 | 2002-12-24 | O2 Micro International Limited | Voltage mode, high accuracy battery charger |
-
2004
- 2004-03-17 CN CNB2004100287169A patent/CN100401616C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5572110A (en) * | 1994-12-15 | 1996-11-05 | Intel Corporation | Smart battery charger system |
| US5684382A (en) * | 1996-07-19 | 1997-11-04 | Compaq Computer Corporation | Control of computer AC adapter output voltage via battery pack feedback |
| US6498461B1 (en) * | 2001-08-17 | 2002-12-24 | O2 Micro International Limited | Voltage mode, high accuracy battery charger |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839397B (en) * | 2009-03-20 | 2011-11-16 | 凹凸电子（武汉）有限公司 | Portable lighting device and method for supplying power to load circuit |
| US8120263B2 (en) | 2009-03-20 | 2012-02-21 | O2Micro, Inc | Portable lighting device and method thereof |
| US8508142B2 (en) | 2009-03-20 | 2013-08-13 | O2Micro Inc. | Portable lighting device and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1592029A (en) | 2005-03-09 |
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Effective date of registration: 20200805 Address after: 1st floor, building A6, software new town, No.9, Huacheng Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province Patentee after: O2Micro Electronics (Wuhan) Co.,Ltd. Address before: Grand Cayman British Cayman Islands Patentee before: O2Micro International Ltd. |
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Effective date of registration: 20200923 Address after: 1-121, 2 / F, No.1, Shanyuan street, Haidian District, Beijing 100089 Patentee after: Beijing Dashun Technology Co.,Ltd. Address before: 430074, Hubei province Wuhan East Lake New Technology Development Zone Huacheng Avenue 9 Software Metro A6 building, 1 floor Patentee before: O2Micro Electronics (Wuhan) Co.,Ltd. |
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