CN102130491B - Power supply system and portable electronic device - Google Patents
Power supply system and portable electronic device Download PDFInfo
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- CN102130491B CN102130491B CN201010000869.8A CN201010000869A CN102130491B CN 102130491 B CN102130491 B CN 102130491B CN 201010000869 A CN201010000869 A CN 201010000869A CN 102130491 B CN102130491 B CN 102130491B
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Abstract
The invention relates to a power supply system and a portable electronic device. The power supply system comprises a transformer, a battery, a selection module, a first-stage direct current conversion module, a plurality of second-stage direct current conversion modules and a switching module, wherein the transformer is used for converting an external alternating current power supply to an external direct current power supply; the battery is used for providing a power supply of the battery; the selection module is used for outputting the external direct current power supply or the power supply of the battery; the first-stage direct current conversion module is used for converting the power supply outputted by the selection module to a first direct current power supply; each second-stage direct current conversion module is used for converting the input power supply to a second direct current power supply; and the switching module is used for selecting the first direct current power supply outputting the power supply of the battery or the first-stage direct current conversion module as the input power supply of each second-stage direct current conversion module according to the external direct current power supply.
Description
Technical field
The present invention relates to a kind of power system and portable electron device, particularly relate to and a kind ofly only need in existing design architecture, increase the part of minority, can significantly improve the power system of power supply conversion efficiency and use the portable electron device of this power system.
Background technology
Along with scientific and technological development and the progress of industry, portable electron device, as mobile computer, mobile phone, camera, MP3 player etc., the chance being used in daily life also significantly increases.Generally speaking, portable electron device compact in size, is also pursued the increase of system effectiveness and portable use time except emphasizing now.Yet when system effectiveness increases, the power consumption that system consumes often also can synchronously increase, and is unfavorable for the endurance of battery, therefore in product design, system effectiveness and battery endurance often fish and bear's paw cannot get both.
Traditionally, increase battery endurance only has two kinds of modes: the first strengthens battery capacity, but relatively can increase product cost; It two is to change high efficiency part, to reduce the energy loss of power supply transfer process, but can increase design cost equally.Hence one can see that, increase battery endurance and must significantly increase manufacturing cost, and then increase production unit cost, loses the competitiveness of product.
Therefore, how not increase too much manufacturing cost, but can significantly promote battery endurance, becoming one of target that industry makes great efforts.
Summary of the invention
Therefore, main purpose of the present invention is to provide a kind of power system and portable electron device.
The present invention discloses a kind of power system, for a portable electron device, promotes the portable use time, and this power system includes a transformer, is used for receiving an external AC power supply, so that this external AC power supply is converted to an external direct current power supply; One battery, is used for store electrical energy, so that a battery supply to be provided; One selects module, is used for according to the chimerism of this external AC power supply and this transformer, exports this external direct current power supply or this battery supply; One first order DC conversion modules, is coupled to this selection module, is used for this selection power supply that module exports to be converted to one first DC power supply; A plurality of second level DC conversion modules, each second level DC conversion modules is used for an input power to be converted to one second DC power supply; An and handover module, be coupled to this external direct current power supply, this battery supply, this first order DC conversion modules and the plurality of second level DC conversion modules, be used for according to this external direct current power supply, this input power that this first DC power supply of selecting this battery supply of output or this first order DC conversion modules is each second level DC conversion modules.
The present invention also discloses a kind of portable electron device, can promote battery endurance, includes a running circuit, includes a plurality of operating modules, is used for carrying out a plurality of operational functions; And a power system, include a transformer, be used for receiving an external AC power supply, so that this external AC power supply is converted to an external direct current power supply; One battery, is used for store electrical energy, so that a battery supply to be provided; One selects module, is used for according to the chimerism of this external AC power supply and this transformer, exports this external direct current power supply or this battery supply; One first order DC conversion modules, is coupled to this selection module, is used for this selection power supply that module exports to be converted to one first DC power supply; A plurality of second level DC conversion modules, each second level DC conversion modules is used for an input power to be converted to one second DC power supply, to be supplied to the plurality of sub-operating module; An and handover module, be coupled to this external direct current power supply, this battery supply, this first order DC conversion modules and the plurality of second level DC conversion modules, be used for according to this external direct current power supply, this input power that this first DC power supply of selecting this battery supply of output or this first order DC conversion modules is each second level DC conversion modules.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of an existing power system.
Fig. 2 is the schematic diagram of a second level DC conversion modules in Fig. 1.
Fig. 3 A is the schematic diagram of the embodiment of the present invention one power system.
Fig. 3 B is the schematic diagram of a handover module in Fig. 3 A.
Reference numeral explanation
10,30 power systems
V_AD external direct current power supply
V_BT battery supply
VDC_1, VDC_2_1～VDC_2_n, VDC_2_x DC power supply
100 select module
IDC_1 first order DC conversion modules
IDC_2_1～IDC_2_n, IDC_2_x second level DC conversion modules
Q1, Q2 switching transistor
200 control modules
202,204 drivers
V_FB feedbacks signal
L inductance
C electric capacity
ND node
300 handover modules
PMOS P transistor npn npn
D1, D2 diode
G grid
D drain electrode
S source electrode
Embodiment
The electronic installation that the present invention be directed to " multiple stage type power supply supply framework ", main purpose is in existing design architecture, the part that only increases minority improves power supply conversion efficiency, to reduce conversion consume, and then increases battery endurance.First, " multiple stage type power supply supply framework " is a kind of power supply supply framework being usually used in the highly energy-consuming portable electron devices such as mobile computer, and its typical framework can be reduced to a power system 10, as shown in Figure 1.Power system 10 is used for an external direct current power supply V_AD or a battery supply V_BT to be converted to suitable DC power supply VDC_2_1～VDC_2_n, and it includes a selection module 100, a first order DC conversion modules IDC_1 and second level DC conversion modules IDC_2_1～IDC_2_n.External direct current power supply V_AD represents the DC power supply that produces or change out by external power source, take mobile computer as example, is generally by transformer, civil power (alternating current) is converted to the DC power supply of 19V.Battery supply V_BT represents the DC power supply that rechargeable battery is exported, and is usually less than external direct current power supply V_AD, is 12V～16V.DC power supply VDC_2_1～VDC_2_n represents to operate different operating modules in circuit and carries out the required power supply of corresponding operational function, and its magnitude of voltage may be identical or different, viewing system demand and determining.In addition, should be noted, Fig. 1 is only used for illustrating the concept of multiple stage type power supply supply framework, therefore omitted the irrelevant circuit unit of object of realizing with institute of the present invention wish, as charging circuit etc., the technology that this answers those skilled in the art can know with reference to prior art, therefore do not describe in detail.
In Fig. 1, select to select an output power supply wherein to first order DC conversion modules IDC_1 in module 100 use cause external direct current power supply V_AD and battery supply V_BT, the logic of its selection is (to indicate external power supply) when external direct current power supply V_AD is greater than a default value, output external direct current power supply V_AD, otherwise, output battery supply V_BT.First order DC conversion modules IDC_1 is electrically connected at and selects module 100, the power supply that is used for that selection module 100 is exported is converted to the DC power supply VDC_1 of 5V, then DC power supply VDC_1 is provided and gives second level DC conversion modules IDC_2_1～IDC_2_n use.Second level DC conversion modules IDC_2_1～IDC_2_n is connected in first order DC conversion modules IDC_1 and selects module 100, can be driven by DC power supply VDC_1, the DC power supply V_AD or the battery supply V_BT that select module 100 to export are converted to DC power supply VDC_2_1～VDC_2_n, for the different operating modules that should operate in circuit.Generally speaking, the function mode of first order DC conversion modules IDC_1 and second level DC conversion modules IDC_2_1～IDC_2_n is similar, common technology is with pulse width modulation (Pulse Width Modulation, PWM) mode, carries out DC power supply conversion (step-down).Please refer to Fig. 2, Fig. 2 is the schematic diagram of arbitrary second level DC conversion modules IDC_2_x.In the DC conversion modules IDC_2_x of the second level, one control module 200 is a Pwm controller, be used for according to a back coupling signal V_FB, via driver 202,204, the work period of control switch transistor Q1, Q2 (Duty Cycle), with the capacitor and inductor effect of utilizing an inductance L and a capacitor C to be produced, DC power supply V_AD or battery supply V_BT are converted to the DC power supply VDC_2_x of suitable size.
With regard to circuit framework, no matter the size of DC power supply VDC_1 why, as long as the magnitude of voltage of DC power supply VDC_1 is enough to drive control module 200 runnings, second level DC conversion modules IDC_2_x all can by DC power supply V_AD or battery supply V_BT be converted to DC power supply VDC_2_x.Yet on side circuit, the resistance to pressure of switching transistor Q1, Q2 has its restriction, if excessive power supply is poured into the grid of switching transistor Q1, Q2, can because of moment grid burn to excessive switching transistor Q1, the Q2 of causing of source electrode pressure reduction.In this case, transistorized manufacturer all can provide the reference data of transistor voltage endurance capability, for designer's reference; Certainly, the transistor that voltage endurance capability is higher, price is also higher.Generally speaking, its grid of switching transistor Q1, Q2 that DC conversion modules IDC_2_1～IDC_2_n in the second level is used to the withstand voltage of source electrode is 20V.In other words, if directly export high-tension external direct current power supply V_AD (about 19V) to second level DC conversion modules IDC_2_1～IDC_2_n, be easy to cause second level DC conversion modules IDC_2_1～IDC_2_n to burn, this is also the reason that power system 10 needs two-stage DC conversion modules.
The size of input power, except affecting whether second level DC conversion modules IDC_2_1～IDC_2_n burn, also can affect its power supply conversion efficiency.Power supply conversion efficiency is subject to the impact of the imperfect factor in circuit, and one of them is exactly draining to the conducting resistance of source electrode of switching transistor Q1, Q2, and conducting resistance is relevant to the voltage difference of source electrode with grid.Generally speaking, when the voltage difference draining to source electrode of switching transistor Q1, Q2 is identical, grid is higher to the voltage difference of source electrode, and conducting resistance is less, and power supply conversion efficiency is better, that is conversion loss is fewer.
Therefore,, in order to improve battery endurance, the present invention drives the voltage of second level DC conversion modules IDC_2_1～IDC_2_n while being raising system use battery supply V_BT, to reduce the conducting resistance of switching transistor Q1, Q2, and then improve power supply conversion efficiency.Please refer to Fig. 3 A, Fig. 3 A is the schematic diagram of the embodiment of the present invention one power system 30.For clearly demonstrating concept of the present invention, in power system 30 with power system 10 in the assembly of identical function adopt same-sign and title.Therefore, comparison diagram 1 and Fig. 3 A are known, power system 30 is between first order DC conversion modules IDC_1 and a node ND, to increase by a handover module 300 in power system 10, its objective is for when power system 30 is used battery supply V_BT, using the input power of battery supply V_BT as second level DC conversion modules IDC_2_1～IDC_2_n.The function mode of remaining component in power system 30, as selected module 100, first order DC conversion modules IDC_1 and second level DC conversion modules IDC_2_1～IDC_2_n etc., as hereinbefore, therefore it will not go into details.
The magnitude of voltage of battery supply V_BT is 12V～16V, the withstand voltage upper limit far below the grid of switching transistor Q1, Q2 to source electrode, therefore be applicable to being used as the input power of second level DC conversion modules IDC_2_1～IDC_2_n, can promote power supply conversion efficiency simultaneously, reduce the energy loss while using battery supply V_BT, and then increase battery endurance.
Specifically,, please continue to refer to Fig. 3 B, Fig. 3 B is the schematic diagram of handover module 300 in Fig. 3 A.Handover module 300 includes a P transistor npn npn PMOS and diode D1, D2.The drain D of P transistor npn npn PMOS is coupled to one end of diode D2, and grid G is coupled to external direct current power supply V_AD, and source S is coupled to battery supply V_BT.Therefore, when system is not connected to external power supply, external direct current power supply V_AD is 0, and battery supply V_BT is 12V～16V, make P transistor npn npn PMOS conducting, so that battery supply V_BT is sent to second level DC conversion modules IDC_2_1～IDC_2_n via diode D2.Now, the magnitude of voltage of node ND (voltage that is about battery supply V_BT subtracts the limit voltage of diode D2) is greater than the DC power supply VDC_1 of 5V, so diode D1 closes, and can avoid battery supply V_BT to pour into first order DC conversion modules IDC_1.
Therefore,, by handover module 300, when system is connected to external power supply, power system 30 is to using the input power of DC power supply VDC_1 as second level DC conversion modules IDC_2_1～IDC_2_n; And when system is not connected to external power supply, 30 of power systems are usingd the input power of battery supply V_BT as second level DC conversion modules IDC_2_1～IDC_2_n.Thus, when portable electron device is used battery, the present invention can effectively reduce the conducting resistance of second level DC conversion modules IDC_2_1～IDC_2_n, and then improves the power supply conversion efficiency of second level DC conversion modules IDC_2_1～IDC_2_n.Thus, the energy loss of power supply transfer process is minimized, and in other words, can reduce the consumption of battery electric quantity, to extend battery endurance.
Should be noted, Fig. 3 A and Fig. 3 B illustrate spirit of the present invention, and other circuit that can in good time battery supply V_BT be switched to the input power of second level DC conversion modules IDC_2_1～IDC_2_n all can be used for the present invention, and is not limited to this.In addition, omitted other irrelevant assembly of object of realizing with institute of the present invention wish in power system 30, those skilled in the art can, according to required, do suitable variation.For example, above stated specification is to take two level frameworks as example, in fact, and the also applicable the present invention of other multi-stage power source supply system; Meanwhile, the quantity of the DC conversion modules of every one-level does not also have any restriction, looks closely system requirements and determines.In addition,, in Fig. 3 A, first order DC conversion modules IDC_1 and second level DC conversion modules IDC_2_1～IDC_2_n also can be used other common direct current switch technology, are not limited to pulse width modulating technology.Moreover, handover module 300 is in order to battery supply V_BT is switched to the input power of second level DC conversion modules IDC_2_1～IDC_2_n in good time, and avoid battery supply V_BT to pour in down a chimney to the DC power supply VDC_1 of first order DC conversion modules IDC_1 or first order DC conversion modules IDC_1 output pouring into rechargeable battery, everyly can realize this object person, all can be used to realize handover module 300, and be not limited to the example of Fig. 3 B.
By handover module 300, portable electron device can effectively improve the power supply conversion efficiency while using battery, to reduce energy loss, and then extends battery endurance.From actual measurement, when the input power of second level DC conversion modules IDC_2_1～IDC_2_n changes the battery supply of 12V～16V into by the DC power supply VDC_1 of 5V, the conducting resistance of switching transistor Q1, Q2 can reduce approximately 17～40%, thereby can effectively reduce power supply conversion loss.The more important thing is, handover module 300 as shown in Figure 3 B, its manufacturing cost increasing is lower than 3 yuan of New Taiwan Dollar.In other words, only needing increases a little manufacturing cost, can obviously promote power supply conversion efficiency, and then extends service time of battery.
In sum, electronic installation for " multiple stage type power supply supply framework ", the present invention only need increase the part of minority in existing design architecture, can significantly improve power supply conversion efficiency, and then reduce conversion and consume, increase battery endurance, to promote the product competitiveness of portable electron device.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (12)
1. a power system, promotes the portable use time for a portable electron device, and this power system includes:
One transformer, is used for receiving an external AC power supply, so that this external AC power supply is converted to an external direct current power supply;
One battery, is used for store electrical energy, so that a battery supply to be provided;
One selects module, is used for, according to the electric connection state of this external AC power supply and this transformer, exporting this external direct current power supply or this battery supply;
One first order DC conversion modules, is coupled to this selection module, and the power supply that is used for that this selection module is exported is converted to one first DC power supply;
A plurality of second level DC conversion modules, each second level DC conversion modules is coupled to this first order DC conversion modules and this selection module, is used for using an input power as driving external direct current power supply or this battery supply by this selection module output to be converted to one second DC power supply; And
One handover module, be coupled to this external direct current power supply, this battery supply, this first order DC conversion modules and the plurality of second level DC conversion modules, be used for according to this external direct current power supply, select this input power that this battery supply of output or this first DC power supply are each second level DC conversion modules.
2. power system as claimed in claim 1, wherein this selection module, when this external AC power supply is electrically connected at this transformer, is exported this external direct current power supply to this first order DC conversion modules.
3. power system as claimed in claim 1, wherein this selection module, when this external AC power supply is not electrically connected at this transformer, is exported this battery supply to this first order DC conversion modules.
4. power system as claimed in claim 1, wherein this handover module includes:
One transistor, includes a first end and is coupled to this external direct current power supply, and one second end is coupled to this battery supply, and one the 3rd end, is used for according to the magnitude of voltage of this external direct current power supply of this first end, and this second end of conducting to the signal of the 3rd end links;
One first diode, is coupled between this first order DC conversion modules and the plurality of second level DC conversion modules; And
One second diode, is coupled between this transistorized the 3rd end and the plurality of second level DC conversion modules.
5. power system as claimed in claim 4, wherein this transistor is a P-type mos transistor, and this first end is a grid, and this second end is one source pole, and the 3rd end is a drain electrode.
6. power system as claimed in claim 4, wherein the magnitude of voltage of this first DC power supply is less than the magnitude of voltage of this battery supply.
7. a portable electron device, can promote battery endurance, includes:
One running circuit, includes a plurality of operating modules, is used for carrying out a plurality of operational functions; And
One power system, includes:
One transformer, is used for receiving an external AC power supply, so that this external AC power supply is converted to an external direct current power supply;
One battery, is used for store electrical energy, so that a battery supply to be provided;
One selects module, is used for, according to the electric connection state of this external AC power supply and this transformer, exporting this external direct current power supply or this battery supply;
One first order DC conversion modules, is coupled to this selection module, and the power supply that is used for that this selection module is exported is converted to one first DC power supply;
A plurality of second level DC conversion modules, each second level DC conversion modules is coupled to this first order DC conversion modules and this selection module, be used for an input power as driving external direct current power supply or this battery supply by this selection module output to be converted to one second DC power supply, to be supplied to the plurality of operating module; And
One handover module, be coupled to this external direct current power supply, this battery supply, this first order DC conversion modules and the plurality of second level DC conversion modules, be used for according to this external direct current power supply, select this input power that this battery supply of output or this first DC power supply are each second level DC conversion modules.
8. portable electron device as claimed in claim 7, wherein this selection module, when this external AC power supply is electrically connected at this transformer, is exported this external direct current power supply to this first order DC conversion modules.
9. portable electron device as claimed in claim 7, wherein this selection module, when this external AC power supply is not electrically connected at this transformer, is exported this battery supply to this first order DC conversion modules.
10. portable electron device as claimed in claim 7, wherein this handover module includes:
One transistor, includes a first end and is coupled to this external direct current power supply, and one second end is coupled to this battery supply, and one the 3rd end, is used for according to the magnitude of voltage of this external direct current power supply of this first end, and this second end of conducting to the signal of the 3rd end links;
One first diode, is coupled between this first order DC conversion modules and the plurality of second level DC conversion modules; And
One second diode, is coupled between this transistorized the 3rd end and the plurality of second level DC conversion modules.
11. portable electron devices as claimed in claim 10, wherein this transistor is a P-type mos transistor, and this first end is a grid, and this second end is one source pole, and the 3rd end is a drain electrode.
12. portable electron devices as claimed in claim 10, wherein the magnitude of voltage of this first DC power supply is less than the magnitude of voltage of this battery supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010000869.8A CN102130491B (en) | 2010-01-19 | 2010-01-19 | Power supply system and portable electronic device |
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| CN201010000869.8A CN102130491B (en) | 2010-01-19 | 2010-01-19 | Power supply system and portable electronic device |
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| CN102130491A CN102130491A (en) | 2011-07-20 |
| CN102130491B true CN102130491B (en) | 2014-03-12 |
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| CN110176946A (en) * | 2019-01-30 | 2019-08-27 | 深圳市晟瑞科技有限公司 | A kind of relay amplification device and relay amplifier |
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| CN2510913Y (en) * | 2001-07-31 | 2002-09-11 | 陈德福 | Multifunctional power source supplier |
| CN200953483Y (en) * | 2006-09-20 | 2007-09-26 | 李然 | USB equipment power supply device |
| CN101312303A (en) * | 2007-05-21 | 2008-11-26 | 佛山普立华科技有限公司 | Power source switching apparatus |
| WO2010000544A2 (en) * | 2008-07-03 | 2010-01-07 | Sinitec Vertriebsgesellschaft Mbh | Circuit arrangement and control circuit for a power supply unit, computer power supply unit and method for switching a power supply unit |
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2010
- 2010-01-19 CN CN201010000869.8A patent/CN102130491B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2510913Y (en) * | 2001-07-31 | 2002-09-11 | 陈德福 | Multifunctional power source supplier |
| CN200953483Y (en) * | 2006-09-20 | 2007-09-26 | 李然 | USB equipment power supply device |
| CN101312303A (en) * | 2007-05-21 | 2008-11-26 | 佛山普立华科技有限公司 | Power source switching apparatus |
| WO2010000544A2 (en) * | 2008-07-03 | 2010-01-07 | Sinitec Vertriebsgesellschaft Mbh | Circuit arrangement and control circuit for a power supply unit, computer power supply unit and method for switching a power supply unit |
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