CN103248078A - Power supply management system, power supply management method and electronic device - Google Patents
Power supply management system, power supply management method and electronic device Download PDFInfo
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- CN103248078A CN103248078A CN2012100285967A CN201210028596A CN103248078A CN 103248078 A CN103248078 A CN 103248078A CN 2012100285967 A CN2012100285967 A CN 2012100285967A CN 201210028596 A CN201210028596 A CN 201210028596A CN 103248078 A CN103248078 A CN 103248078A
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Abstract
The invention provides a power supply management system, a power supply management method and an electronic device. The power supply management method comprises the following steps: judging whether supply voltage is smaller than a first voltage value or not; if the supply voltage is smaller than the first voltage value, increasing the supply voltage to the first voltage value so as to operate at least one load; and if the supply voltage is greater than or equal to the first voltage value, directly supplying the supply voltage to the load to operate the load, thus improving the conversion efficiency of the system.
Description
Technical field
The present invention relates to a kind of power-supply management system and method thereof, particularly a kind of power-supply management system of energy elevator system conversion efficiency is put and method.
Background technology
Along with making rapid progress of science and technology, digital camera (Digital Still Camera in recent years, DSC) product is constantly weeded out the old and bring forth the new, the functional requirement of consumer's logarithmic code camera also constantly promotes, for example, screen sizes, gps satellite navigation, WI-FI function, big capacity memory body, the anti-hand shake of optics, the number of taking pictures increase etc.And work as the product function demand more for a long time, except meeting make design more complicated, the required power supply that provides also can be more many groups, but digital camera is to use lithium battery (Lithium Battery mostly now, Li) and alkaline battery (Alkaline Battery, AA) provide camera power supply, and cell voltage can reduce with service time, and can't effectively provide each assembly required operating voltage.
At present the traditional method major part be by power management chip with the direct boost conversion of cell voltage to 5V, for motor running, be transformed into the required operating voltage of system from the 5V step-down more afterwards.Yet, usually the required about 3.3V of operating voltage of system, sometimes the voltage supplied of battery just has been enough to for its running, and therefore traditional power management can make power consumption in meaningless conversion, make power conversion efficiency reduce, and then shorten the useful life of product.
Therefore, need badly and propose a kind of novelty and effective power management method, the phase can promote whole conversion efficiency, and then prolongs the service time of product.
Summary of the invention
In view of above-mentioned, one of purpose of the embodiment of the invention is to propose a kind of power-supply management system and method thereof, and it can avoid power consumption in insignificant conversion, promoting whole conversion efficiency, and then prolongs service time of product.
According to the disclosed method for managing power supply of the embodiment of the invention, comprising: judge that whether a supply voltage is less than one first magnitude of voltage.If supply voltage then will be supplied boost in voltage to the first magnitude of voltage, at least one load operation less than first magnitude of voltage.If supply voltage more than or equal to first magnitude of voltage, then directly provides supply voltage to load operation.
According to another embodiment of the present invention, power-supply management system comprises a power-supply unit and a power management chip.Power-supply unit is used to provide a supply voltage.Power management chip is coupled to power-supply unit, is used for judging that whether supply voltage is less than one first magnitude of voltage.Wherein, if supply voltage is less than first magnitude of voltage, then power management chip will be supplied boost in voltage to the first magnitude of voltage, at least one load operation, and if supply voltage more than or equal to first magnitude of voltage, then power management chip directly provides supply voltage to load operation.
According to further embodiment of this invention, a kind of electronic installation comprises power-supply management system as described in the present invention, and wherein the voltage that produces of first passage is for motor module running, the whole system running of the sub-device of power voltage supply that second channel produces.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 shows the system block diagram of the electronic installation of the embodiment of the invention;
Fig. 2 shows the flow chart of the method for managing power supply of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing structural principle of the present invention and operation principle are done concrete description:
Fig. 1 shows the system block diagram of the electronic installation of the embodiment of the invention.Electronic installation 1 can be digital camera, digital code camera, computer, personal digital assistant, satellite navigation system, multimedia player or mobile phone, but not as limit.
Consult Fig. 1, in the present embodiment, electronic installation 1 is example with the digital camera, mainly comprises a power-supply management system 11 and a plurality of load 131-13N (all being called load 13).Power-supply management system 11 comprises a power-supply unit 111 and a power management chip 113.Power-supply unit 111 is used to provide electric power and gives electronic installation 1; Power management chip 113 is coupled to power-supply unit 111, is used for converting the electric power that power-supply unit 111 provides to operating voltage that each load 131-13N is suitable for.Specifically, power-supply unit 111 comprises lithium battery (Li battery) or alkaline battery (Alkaline battery), is to be example with the lithium battery in the present embodiment, but is not limited thereto.Load 13 comprises motor module 131, flash modules, camera lens module, image sensor, memory body, digital signal process chip (DSP) 13N, display module and combination thereof, but is not limited with the revealer.
Power management chip 113 comprises a plurality of passages (channel), be a first passage 1131, a second channel 1132 ..., a N passage 113N, correspond respectively to different load 131-13N.Specifically, behind the supply voltage that power management chip 113 reception power-supply units 111 provide, it is boosted in meeting or step-down is converted to the required operating voltage of load 131-13N, for example, the voltage that first passage 1131 produces is for motor module 131 runnings, and 132 runnings of sub-device 1 whole system of the power voltage supply that second channel 1132 produces.
The operating voltage difference that each load 131-13N is required, among the embodiment, the operating voltages that motor module 131 needs usually can be bigger than the supply voltage that power-supply unit 111 provides, for example, 5V; And system's 132 required operating voltages can be less, for example, and 3.3V.So for the booster tension conversion efficiency, when power-supply unit 111 provides supply voltage, for example, lithium battery is inserted in the electronic installation 1, operations such as power management chip 113 can judge whether present electronic installation 1 must operate motor module 131, for example, focuses earlier, shooting.If must operate motor module 131, represent that then the supply undertension that power-supply unit 111 provides uses for motor module 131, just can will supply boost in voltage via first passage 131 and give motor module 131 runnings to 5V.
Otherwise if under the situation that motor module 131 need not move, for example, digital camera is in preview, play photo and when making video recording, the supply voltage that power-supply unit 111 provides just might be enough to supply with the running of other loads 13.Therefore, power management chip 113 can further be judged supply voltage more whether less than first a default magnitude of voltage, and among the embodiment, default first magnitude of voltage can be, but does not limit 3.7V.
If judge that supply voltage is less than first magnitude of voltage, then power management chip 113 can will be supplied boost in voltage by first passage 1131 earlier and be converted to first magnitude of voltage, and the supply voltage after will boosting exports second channel 1132 to via first passage 1131, to supply voltage step-down by second channel 1132 more afterwards and be converted to the operating voltage that system 132 can operate, as 3.3V, for system's 132 runnings.If judge supply voltage more than or equal to first magnitude of voltage, then power management chip 113 just can directly provide supply voltage to load 13 runnings.Specifically, power management chip 113 directly exports the supply voltage that power-supply unit 111 produces to second channel 1132 via first passage 1131, and will supply voltage step-down by second channel 1132 and be converted to the operating voltage that system 132 can operate, as 3.3V, for system's 132 runnings.Start after the load of second channel 1132 correspondences, just can in regular turn the supply voltage step-down be converted to the operating voltage that all the other loads 13 are suitable for.Specifically, among the embodiment, each the channel start order in the power management chip 113 can be done transfer according to user's demand, and therefore, the last second channel of Yu Shizuo may not be preferential boot sequence.And the power management chip 113 setting first passages that the present invention proposes are that override starts, and second channel is the startup of the 4th cis-position, but are not limited with the revealer.
What deserves to be mentioned is that passage 1131-113N comprises MOSFET respectively, but also can be any suitable element, as NMOS, PMOS, diode or polarized lense pipe, and above-mentioned combination, so be not limited with the revealer.Because it is anti-that the MOSFET of passage 1131-113N inside has group, can produce the pressure reduction of about 0.2V, and the voltage that causes actual converted to go out is lower than the operating voltage that system 132 can operate, so the operating voltage that default first magnitude of voltage of the present invention can operate a little more than system 132.For example, if the operating voltage that system 132 can operate is 3.3V, then first magnitude of voltage can be set at 3.7V as the current potential of judging the supply voltage that power-supply unit 111 provides.
In view of above-mentioned about electric power management mechanism of the present invention, be to be criterion with first magnitude of voltage, and when supply voltage is lower than this first magnitude of voltage, can will supply boost in voltage to the first magnitude of voltage by first passage 1131 earlier, by second channel 1,132 the first magnitude of voltage step-down is changed to system end again, to the 5V practice of step-down again, conversion efficiency of the present invention will significantly promote, and especially show the most under the situation that motor module 131 need not operate compared to traditional supply voltage that boosts earlier.
Fig. 2 shows the flow chart of the method for managing power supply of the embodiment of the invention.Method for managing power supply is applicable to electronic installation shown in Figure 11.Method for managing power supply below is described, please consults Fig. 1 simultaneously.
At first, the user inserts lithium battery in the electronic installation 1, so that a supply voltage (step S201) to be provided.Microprocessor (not shown) in the electronic installation 1 is just sent enable signal and is started power management chip 113 (step S203).Afterwards, power management chip 113 can judge whether present electronic installation 1 must operate motor module 131 (step S205) earlier, if, just power management chip 113 operates (step S207) via the first passage 1131 supply voltage that boosts for motor module 131.
If need not running to motor module 131, just power management chip 113 judges that more whether supply voltage is less than default first magnitude of voltage (step S209), as 3.7V.If be converted to first magnitude of voltage (step S211) just power management chip 113 will be supplied boost in voltage via first passage 1131; If step S209 is judged as not, power management chip 113 just directly will be supplied voltage via first passage 1131 outputs (step S213).At last, power management chip 113 is done the step-down conversion with the supply voltage that step S207, S211, S213 handle back (boosting or directly output), for system 132 running, and will supply voltage step-down in regular turn and be converted to the suitable operating voltage (step S215) of all the other loads 13.
According to above-described embodiment, power-supply management system proposed by the invention and method thereof, mainly be under the situation that motor module 131 need not move, be criterion with first magnitude of voltage, if the voltage of supplying is less than first magnitude of voltage, just only need the supply power supply is boosted to first magnitude of voltage (as 3.7V) step-down again; Otherwise, can directly output to second channel 1132 and do the step-down conversion, for each load 13 running.Compared to existing boost earlier supply voltage to 5V again the practice of step-down only can obtain 84.92% conversion efficiency, and the present invention is when cell voltage is 3.7V, the step-down conversion efficiency is 97.36%; When cell voltage was 4.2V, the step-down conversion efficiency was 96.09%; Even and when cell voltage is 3.3V, need earlier 3.3V by first passage 1131 boost conversion to 3.69V, again with 3.69V as the input power supply of second channel 1132 and carry out step-down and change to system power supply 3.3V, its complete conversion efficiency also reaches 90.28%.Therefore, the mode that the present invention proposes more can significantly promote the whole conversion efficiency of power management, and then prolongs the useful life of product.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. a method for managing power supply is characterized in that, comprises:
Judge that whether a supply voltage is less than one first magnitude of voltage;
If this supply voltage then should be supplied boost in voltage to this first magnitude of voltage less than this first magnitude of voltage; And
If this supply voltage then provides this supply voltage to give at least one load more than or equal to this first magnitude of voltage.
2. method for managing power supply according to claim 1 is characterized in that, provides this step that supply voltage gives this load to comprise:
This supply voltage step-down is converted to an operating voltage of this load.
3. method for managing power supply according to claim 1 and 2 is characterized in that, the step of this supply boost in voltage to this first magnitude of voltage comprised:
Should supply boost in voltage and be converted to this first magnitude of voltage by the passage that boosts; And
Downgrade this supply voltage by a buck channel, to be converted to this operating voltage.
4. method for managing power supply according to claim 3, it is characterized in that, described method for managing power supply is applicable to a power management chip, this power management chip comprises a first passage and a second channel, wherein this first passage was in order to should supply boost in voltage to this first magnitude of voltage, and should supply voltage and transport to this second channel, and this second channel is in order to make this supply voltage step-down, so that should supply voltage transitions this operating voltage to this load.
5. method for managing power supply according to claim 1 is characterized in that, this first magnitude of voltage is 3.7V.
6. a power-supply management system is characterized in that, comprises:
One power-supply unit is in order to provide a supply voltage; And
One power management chip is coupled to this power-supply unit, in order to judge that whether this supply voltage is less than one first magnitude of voltage;
Wherein, if this supply voltage is less than this first magnitude of voltage, then this power management chip should be supplied boost in voltage to this first magnitude of voltage, and if this supplies voltage more than or equal to this first magnitude of voltage, then this power management chip provides this supply voltage to give at least one load.
7. power-supply management system according to claim 6, it is characterized in that, this power management chip comprises a first passage and a second channel, when this supplies voltage more than or equal to this first magnitude of voltage, then export this supply voltage to this second channel from this first passage, and change this supply voltage with this second channel step-down.
8. according to claim 6 or 7 described power-supply management systems, it is characterized in that, when this supplies voltage less than this first magnitude of voltage, then this power management chip should be supplied boost in voltage by this first passage and be converted to this first magnitude of voltage, and changed this supply voltage by this second channel step-down again.
9. power-supply management system according to claim 8 is characterized in that, this first magnitude of voltage is 3.7V.
10. an electronic installation comprises power-supply management system as claimed in claim 8, and it is characterized in that the voltage that this first passage produces is for motor module running, and the voltage that this second channel produces is for the whole system running of this electronic installation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210028596.7A CN103248078B (en) | 2012-02-09 | 2012-02-09 | Power-supply management system and method thereof and electronic installation |
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| CN201210028596.7A CN103248078B (en) | 2012-02-09 | 2012-02-09 | Power-supply management system and method thereof and electronic installation |
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| CN103248078A true CN103248078A (en) | 2013-08-14 |
| CN103248078B CN103248078B (en) | 2016-05-18 |
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Citations (4)
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| US20030193364A1 (en) * | 2002-04-16 | 2003-10-16 | Liu Kwang H. | Biasing system and method for low voltage DC-DC converters with built-in N-FETs |
| CN2840472Y (en) * | 2005-09-26 | 2006-11-22 | 群联电子股份有限公司 | Battery power supply return circuit dynamic distributor |
| CN101355824A (en) * | 2007-07-24 | 2009-01-28 | 群光电子股份有限公司 | USB loudspeaker system |
| US20100211921A1 (en) * | 2007-05-31 | 2010-08-19 | Beijing Transpacific Ip Technology Development Ltd | Development verification apparatus for universal chip |
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2012
- 2012-02-09 CN CN201210028596.7A patent/CN103248078B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030193364A1 (en) * | 2002-04-16 | 2003-10-16 | Liu Kwang H. | Biasing system and method for low voltage DC-DC converters with built-in N-FETs |
| CN2840472Y (en) * | 2005-09-26 | 2006-11-22 | 群联电子股份有限公司 | Battery power supply return circuit dynamic distributor |
| US20100211921A1 (en) * | 2007-05-31 | 2010-08-19 | Beijing Transpacific Ip Technology Development Ltd | Development verification apparatus for universal chip |
| CN101355824A (en) * | 2007-07-24 | 2009-01-28 | 群光电子股份有限公司 | USB loudspeaker system |
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| CN103248078B (en) | 2016-05-18 |
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