CN1512642A - Wireless terminal module power supply system - Google Patents
Wireless terminal module power supply system Download PDFInfo
- Publication number
- CN1512642A CN1512642A CNA02159192XA CN02159192A CN1512642A CN 1512642 A CN1512642 A CN 1512642A CN A02159192X A CNA02159192X A CN A02159192XA CN 02159192 A CN02159192 A CN 02159192A CN 1512642 A CN1512642 A CN 1512642A
- Authority
- CN
- China
- Prior art keywords
- power supply
- wireless terminal
- terminal module
- circuit
- external power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
This invention relates to a radio terminal module power supply system including a power supply loop composed of a storage power supply with variable electricity and a first capacitor, parallel to the module. When the module is in shock load, the capacitor can provide electricity to the module to avoide over large voltage drop resulted when a terminal equipment is at large power emitting to increase the effect of batteries.
Description
Technical field
The present invention relates to a kind of electric power system that is applied to use the mobile device of radiotechnics, particularly a kind of wireless terminal module work moment needs the electric power system of big electric current.
Background technology
Along with popularizing of GSM/GPRS technology, wireless GSM/GPRS module has obtained a large amount of application, wireless GSM/GPRS module is made up of the radio circuit of GSM/GPRS protocol stack, baseband processor and band antenna assembly, finish processing to voice, signaling, transfer of data, it is the chief component of wireless terminal, by in inner or outside this module of expansion, can make PDA (palmtop PC) possess wireless communication function.When the GSM/GPRS module under ideal case, the electric current that needs is very little, then needs bigger electric current in wireless terminal module burst load such as registered network, this wireless terminal module of moment of sending data.For example, the supply current that wireless GSM/GPRS module needs under the normal ideal case only is tens milliamperes, but when sending data, the burst current that wireless GSM/GPRS module needs can reach about 2 amperes, cause bigger electric voltage dropping, if surpass the electric voltage dropping scope that GSM/GPRS module operate as normal is allowed, will cause GSM/GPRS module cisco unity malfunction, and therefore reduce the usefulness of utilizing of battery.
Consider the effect of above-mentioned electric voltage dropping, when utilizing wireless GSM/GPRS modular design product, often to consider the resistance that as far as possible reduces power connector and the length of patch cables, and Module Design often recommends the designer that battery and module is direct-connected, and the charging circuit of employing inside modules, may bring the restriction of all multimodes itself thus, as there is not a charging indication etc., the charging deixis often by the software monitoring and indication on upper strata, is often brought the complexity and the ineffective activity of design when some systems of exploitation.
In addition, for the convenience and the purpose of energy saving of managing, prior art comprises an independently power management chip mostly in circuit, this managing chip carries out handover management by set of circuits to multiple power supplies when burst load, identification overtension, brownout and electric current carried out the clamper restriction increased the complexity and the cost of design.
Summary of the invention
Electric supply system when the purpose of this invention is to provide a kind of wireless terminal module burst load, the power supply power supply that is used to solve the wireless terminal module burst load that is similar to wireless GSM/GPRS module one class.
The method according to this invention, a kind of wireless terminal module for power supply system, be used for to the wireless terminal module for power supply, comprise a power supply loop that connects to form by the variable storage power of an electric weight and first electric capacity, described electric capacity is in parallel with described wireless terminal module, and this electric capacity can provide electric energy to this wireless terminal module when described wireless terminal module burst load.
That optimizes also comprises an external power supply device, and this external power supply device comprises:
One voltage stabilizing circuit links to each other with the external power supply input, is used for external power supply is adapted to the required working power of wireless terminal module;
One voltage decision circuitry also links to each other with the external power supply input, detects the voltage signal of external power supply input and has judged whether that according to this voltage signal external power supply inserts, if having, then exports a control signal;
One switch, form by two MOSFET, the drain electrode of described two MOSFET is connected together, source electrode links to each other with electric capacity with storage power respectively, grid then lumps together with above-mentioned voltage decision circuitry and links to each other, and this switch receives control signal that described voltage decision circuitry sends and switches between external power supply and storage power according to this control signal during work.
Further comprise the RC charging circuit that the described switch of a control is slowly opened, the two ends of second electric capacity in this RC circuit are connected on the positive pole of storage power and the grid of described switch MOS FET respectively, and the resistance of this circuit is by the grounded-grid of above-mentioned MOSFET.
Best described storage power is a lithium battery.
Best described voltage stabilizing circuit is LDO (low output) voltage stabilizing circuit.
Electric power system of the present invention, it is big by first capacitor's capacity that the rear end adds is set, the ESR value is little, the excessive electric voltage dropping of having avoided terminal equipment when high-power emission, to cause, the current over pulse phenomenon that causes when utilizing the soft switch technique of RC circuit to solve the first electric capacity momentary charge that above-mentioned rear end adds is not used independent power management chip.
Description of drawings
Fig. 1 is an embodiment of the present invention electric power system principle assumption diagram;
To be the GSM/GPRS module require schematic diagram to the control of GSM/GPRS burst to Fig. 2;
Fig. 3 is that embodiment of the present invention realizes that current limliting ensures the schematic diagram of circuit;
Embodiment
For those skilled in the art better understands the present invention, further describe preferred implementation of the present invention below in conjunction with accompanying drawing.
In the present invention, described storage power can be a lithium battery, also can be hydrogen battery or other electrical storage device, in the present embodiment, unified is that example illustrates design philosophy of the present invention with the battery, no longer distinguishing battery in the following description is lithium battery or hydrogen battery, the electric capacity that the rear end adds in the circuit in preferred implementation of the present invention is a super capacitor in addition, the capacitance of optimizing is between 100～400mF, the ESR value is between 50～80m Ω, below just be that example describes method of the present invention in detail with the super capacitor, please see Figure 1 preferred embodiment for the present invention electric power system structure chart of describing, described electric power system comprises three parts: 1, battery feed circuit connects super capacitor to the terminal module circuit supply by battery; 2, external power supply power supply circuits connect the LDO voltage stabilizing circuit, to the terminal module circuit supply; 3, power supply switch, turn-off certainly, current-limiting circuit, comprise a switch and a voltage decision circuitry, be used for the switching of power supply, the self-shield of battery and the capacitances to supply power that may cause when preventing to carry out the switching of two-way power supply be foot phenomenon not.
The composition and the function of various piece are described in detail in detail below, please referring again to shown in Figure 1:
Battery is connected with a charging circuit, this charging circuit by external power supply to battery charge, at this moment the power supply to the terminal module circuit is all realized by external power supply, specifically realize by a switch, describe in detail in the back, in addition, described battery also links to each other with super capacitor, form one road power supply circuits, described battery charges to super capacitor, and super capacitor stores an amount of energy by charging, when sudden load has sudden power supply to need, confess electric current by super capacitor, safeguards system is to the requirement of sudden electric current.Concrete, when sudden load inserts, the output voltage of energy-storage travelling wave tube super capacitor has electric voltage dropping, but because the appearance value of the super capacitor that adds in the present embodiment is big, the ESR value is very low, and paroxysmal big electric current power supply not only can be provided, and because the ESR value of electric capacity is very little, the change pulse of the supply power voltage of sudden load is kept within the specific limits, reach standard-required with this amplitude that ensures electric voltage dropping.
Please see Figure the 2 GSM/GPRS modules of describing the control of GSM/GPRS burst is required schematic diagram, wireless GSM/GPRS module is generally supply voltage 3.3V～4.8V to the requirement of power supply, burst current (Transmit burst) when sending data can reach about 2A, and the voltage (VBATT+) of this moment can not be lower than 3.3V (minimum value min.3.3V), electric voltage dropping should be at 400mV with interior (electric voltage dropping maximum max.400mV), when electric voltage dropping surpassed 400mV, wireless GSM/GPRS module was with cisco unity malfunction.
The present invention is by these super capacitor power supply circuits, when the wireless terminal module needs power supply to provide the electric current supply of burst for it, can effectively drop-off voltage be controlled in the 200mV, reduced electric voltage dropping to wireless terminal module adverse influence, improved the power supply usefulness of battery significantly, this is very important for utilizing battery powered hand-held terminal device.
External power supply also is absolutely necessary in implementation of the present invention, need as the battery charger of Fig. 1 sign, can form on the one hand battery charge by an integrated chip, when battery need charge, by external power supply in time to its charging.In addition; an external power supply and a voltage stabilizing circuit are formed another road power-supplying circuit; described voltage stabilizing circuit can be LDO commonly used (Low dropout; low voltage stabilizing circuit) circuit; this relatively is easy to realize; because power supply all is to link to each other with adapter usually; place in circuit again; therefore; the external power supply that is addressed in the present invention all refers to the power supply through adapter output; because it is existing through the power supply of adapter and the circuit of not exclusively suitable wireless terminal module; also added a voltage stabilizing circuit in the present invention; be used for converting above-mentioned adaptor power supplies to terminating circuit required power supply; below further narration embodiments of the present invention; provide two-way reliable power supply as above-mentioned; also need a power supply switch circuit between the two-way power supply, effectively to switch; simultaneously owing to added super capacitor; the capacitances to supply power that must guarantee not cause the overcurrent self-shield of battery when charging to electric capacity and prevent to carry out may cause when the two-way power supply switches is foot phenomenon not; comprise also among the present invention that following mask body describes in detail from turn-offing and current-limiting circuit.
Switch referring to circuit structure shown in Figure 1 explanation power circuit, from the realization of turn-off function:
Switch shown in Figure 1 can be realized by the MOSFET (mos field effect transistor) of P raceway groove, concrete is made up of two MOSFET, the drain electrode of two MOSFET is connected together when realizing, the benefit of doing like this is that electric current recharges battery when having prevented the external power supply power supply, mistake appears in the indicating status of avoiding charging, in addition, the source electrode of two MOSFET links to each other with electric capacity with battery respectively, grid then lumps together with above-mentioned voltage decision circuitry and links to each other, do not need grid voltage control during normal power supply, power circuit switches by the voltage decision circuitry to detect whether the external AC power supply access is arranged, as after having detected described external power supply access signal, this voltage decision circuitry is exported a control signal and is given described switch, control switch cuts off battery supply, the power supply of circuit is all realized by external power source behind the external power supply ensure to insert because battery does not participate in power supply, can guarantee to the charging circuit state indication of battery charge accurately.
Utilizing in concrete the application increases a switching device or adopts a voltage comparator circuit can control the shutoff of MOS switch, realizes the shutoff certainly of battery, guarantees that battery can be owing to brownout causes inefficacy.
Internal resistance owing to described super capacitor in the present embodiment is very little; so can produce constantly because the big electric current that the electric capacity momentary charge produces at some; cause the overcurrent self-shield of battery; realize that below in conjunction with circuit structure explanation shown in Figure 3 current limliting ensures the operation principle of circuit; switch mosfet and super capacitor constitute one road RC charging circuit, wherein R among Fig. 3
SBe the internal resistance of source, R1 is the RDS (on) of MOSFET, R
CBe the ESR of super capacitor, C
SAppearance value for super capacitor; Current limliting ensures that circuit is by another road R2, the C1 charging circuit is formed, this RC charging circuit and switch, super capacitor parallel connection, concrete, the two ends of the capacitor C 1 in this RC circuit are connected on the positive pole of storage power and the grid of described switch MOS FET respectively, the resistance R 2 of this circuit is by the grounded-grid of above-mentioned MOSFET, its current limliting ensures that principle is to make according to the maximum rated power electric current of battery the charging current of switch and super capacitor one tunnel, make it can not cause the self-shield of battery, and calculate the charging interval of this super capacitor RC charging circuit; With this time be standard, set the R2 on another road, the value of C1, reaches the purpose that does not cause the overcurrent self-shield of battery when charging to electric capacity at the opening time with control MOS switch.On the other hand, be the capacitances to supply power that prevents to carry out to cause when the two-way power supply switches foot phenomenon not, then the output of external power supply to be transferred to suitable value, and take into account opening the time of control switch simultaneously, the time of opening of control switch is by adjusting R2, the value of C1 realizes, need guarantee during design that the reaction time of charging is not too long, when ensureing that high-power emission and power supply switch to powered battery, electric capacity can provide sufficient electric current and the electric voltage dropping scope can not drop to below the required operating voltage of circuit.
The present invention is applied in the wireless PDA or is used as single wireless modulation-demodulation apparatus and PDA or notebook, simply, flexibly, has effectively solved this class circuit power supply, power supply are switched and the demand of function such as current limliting.
The above only is a preferred implementation of the present invention; be not limited to claim scope of the present invention; any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (5)
1, a kind of wireless terminal module for power supply system, be used for to the wireless terminal module for power supply, it is characterized in that: comprise a power supply loop that connects to form by the variable storage power of an electric weight and first electric capacity, described electric capacity is in parallel with described wireless terminal module, and this electric capacity can provide electric energy to this wireless terminal module when described wireless terminal module burst load.
2, wireless terminal module for power supply according to claim 1 system is characterized in that also comprising an external power supply device, and this external power supply device comprises:
One voltage stabilizing circuit links to each other with the external power supply input, is used for external power supply is adapted to the required working power of wireless terminal module;
One voltage decision circuitry also links to each other with the external power supply input, detects the voltage signal of external power supply input and has judged whether that according to this voltage signal external power supply inserts, if having, then exports a control signal;
One switch, form by two MOSFET, the drain electrode of described two MOSFET is connected together, source electrode links to each other with electric capacity with storage power respectively, grid then lumps together with above-mentioned voltage decision circuitry and links to each other, and this switch receives control signal that described voltage decision circuitry sends and switches between external power supply and storage power according to this control signal during work.
3, wireless terminal module for power supply according to claim 2 system, it is characterized in that also comprising the slowly RC charging circuit of unlatching of the described switch of a control, the two ends of second electric capacity in this RC circuit are connected on the positive pole of storage power and the grid of described switch MOS FET respectively, and the resistance of this circuit is by the grounded-grid of above-mentioned switch MOS FET.
4, according to claim 1,2 or 3 each described wireless terminal module for power supply systems, it is characterized in that described storage power is a lithium battery.
5, wireless terminal module for power supply according to claim 2 system is characterized in that described voltage stabilizing circuit is the LDO voltage stabilizing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02159192XA CN1309143C (en) | 2002-12-30 | 2002-12-30 | Wireless terminal module power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB02159192XA CN1309143C (en) | 2002-12-30 | 2002-12-30 | Wireless terminal module power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1512642A true CN1512642A (en) | 2004-07-14 |
| CN1309143C CN1309143C (en) | 2007-04-04 |
Family
ID=34237355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02159192XA Expired - Fee Related CN1309143C (en) | 2002-12-30 | 2002-12-30 | Wireless terminal module power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1309143C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7633286B2 (en) | 2005-08-31 | 2009-12-15 | Yamatake Corporation | Electric current monitoring device |
| CN102590609A (en) * | 2012-02-16 | 2012-07-18 | 惠州Tcl移动通信有限公司 | Mobile terminal and method for measuring power consumption of mobile terminal |
| CN105515070A (en) * | 2014-09-23 | 2016-04-20 | 成都国星通信有限公司 | Power supply method for power source of Beidou RDSS launching power amplifier powered by low-voltage battery or low-power power source |
| CN106356988A (en) * | 2016-10-09 | 2017-01-25 | 珠海市杰理科技有限公司 | Power switching and controlling circuit |
| CN110014963A (en) * | 2017-12-14 | 2019-07-16 | 浙江万马新能源有限公司 | Charging gun power down unlocks power supply circuit and its control method |
| CN110622386A (en) * | 2018-02-28 | 2019-12-27 | 深圳市大疆创新科技有限公司 | Battery control circuit, power control system and movable platform |
| CN111130345A (en) * | 2020-01-09 | 2020-05-08 | 上海金智晟东电力科技有限公司 | Automatic power supply device of internet of things sensor, internet of things sensor and internet of things equipment |
| US10879738B2 (en) | 2019-05-27 | 2020-12-29 | Wistron Corporation | Electronic apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI94685C (en) * | 1993-11-22 | 1995-10-10 | Nokia Mobile Phones Ltd | Key switched power source for time-multiplexed radio telephone systems |
| US5517153A (en) * | 1995-06-07 | 1996-05-14 | Sgs-Thomson Microelectronics, Inc. | Power supply isolation and switching circuit |
| US6046577A (en) * | 1997-01-02 | 2000-04-04 | Texas Instruments Incorporated | Low-dropout voltage regulator incorporating a current efficient transient response boost circuit |
| EP1202427B1 (en) * | 2000-10-27 | 2013-08-28 | Invensys Systems, Inc. | Load voltage controller for a field device and related control method |
-
2002
- 2002-12-30 CN CNB02159192XA patent/CN1309143C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7633286B2 (en) | 2005-08-31 | 2009-12-15 | Yamatake Corporation | Electric current monitoring device |
| CN102590609A (en) * | 2012-02-16 | 2012-07-18 | 惠州Tcl移动通信有限公司 | Mobile terminal and method for measuring power consumption of mobile terminal |
| CN102590609B (en) * | 2012-02-16 | 2015-12-16 | 惠州Tcl移动通信有限公司 | The method of mobile terminal and measurement mobile terminal power consumption |
| CN105515070A (en) * | 2014-09-23 | 2016-04-20 | 成都国星通信有限公司 | Power supply method for power source of Beidou RDSS launching power amplifier powered by low-voltage battery or low-power power source |
| CN105515070B (en) * | 2014-09-23 | 2018-03-30 | 成都国星通信有限公司 | A kind of Big Dipper RDSS transmitting amplifier power supply method of supplying power to of small-power power power supply |
| CN106356988A (en) * | 2016-10-09 | 2017-01-25 | 珠海市杰理科技有限公司 | Power switching and controlling circuit |
| CN106356988B (en) * | 2016-10-09 | 2019-01-15 | 珠海市杰理科技股份有限公司 | Power supply control switching circuit |
| CN110014963A (en) * | 2017-12-14 | 2019-07-16 | 浙江万马新能源有限公司 | Charging gun power down unlocks power supply circuit and its control method |
| CN110622386A (en) * | 2018-02-28 | 2019-12-27 | 深圳市大疆创新科技有限公司 | Battery control circuit, power control system and movable platform |
| CN110622386B (en) * | 2018-02-28 | 2023-09-12 | 深圳市大疆创新科技有限公司 | Battery control circuit, power supply control system and movable platform |
| US10879738B2 (en) | 2019-05-27 | 2020-12-29 | Wistron Corporation | Electronic apparatus |
| CN111130345A (en) * | 2020-01-09 | 2020-05-08 | 上海金智晟东电力科技有限公司 | Automatic power supply device of internet of things sensor, internet of things sensor and internet of things equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1309143C (en) | 2007-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP4167423A1 (en) | Energy storage system | |
| CN1140034C (en) | Series-connected circuit for secondary batteries | |
| CN1099148C (en) | Battery pack for portable electric apparatus and method for charging thereof | |
| CN1305289C (en) | Apparatus and method for charging from one mobile apparatus to an other mobile apparatus | |
| CN102340169A (en) | Double battery power supply circuit | |
| CN103560550B (en) | One can be powered and charging device to mobile electronic device simultaneously | |
| CN1309143C (en) | Wireless terminal module power supply system | |
| CN102118052B (en) | Power supply management system | |
| WO2021155240A1 (en) | Multi-mode dc-to-dc power converter | |
| CN1949620A (en) | Power managing system with multi-charging modes | |
| CN114696384A (en) | Power supply control method and power supply controller of terminal and terminal | |
| CN106451752B (en) | Battery voltage equalizing circuit suitable for UPS | |
| CN101976823A (en) | Undervoltage protection circuit for battery | |
| CN201222649Y (en) | Overdischarging protection circuit capable of charging battery | |
| CN103795400B (en) | High-precision sampling circuit based on VICOR module | |
| CN114696387A (en) | Terminal discharge control method, discharge controller and terminal | |
| CN218415857U (en) | Power supply circuit of mobile phone power supply | |
| CN210327112U (en) | Power management circuit, electric equipment and electric equipment system | |
| CN213402485U (en) | Battery output undervoltage protection circuit and battery protection management device | |
| CN2586282Y (en) | Energy reclaiming battery charging/discharging device | |
| CN215528640U (en) | Charging circuit | |
| CN217508270U (en) | Undervoltage and short-circuit protection circuit | |
| CN211958804U (en) | Multifunctional charging device and system | |
| CN111448738B (en) | Multifunctional charging device and system | |
| EP4228120A1 (en) | Power system, charging method, and discharging method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070404 Termination date: 20201230 |