CN106410871A - Power supply management system and method - Google Patents
Power supply management system and method Download PDFInfo
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- CN106410871A CN106410871A CN201510422358.8A CN201510422358A CN106410871A CN 106410871 A CN106410871 A CN 106410871A CN 201510422358 A CN201510422358 A CN 201510422358A CN 106410871 A CN106410871 A CN 106410871A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The present invention provides a power supply management system and method used for an electronic device containing a battery and a power supply management unit. The system comprises a comparison unit of which the negative input end is connected with the battery and the positive input end accesses a preset voltage, wherein the comparison unit is used for outputting an enabling signal based on a comparison result of a battery voltage received by the negative input end and a preset voltage; a boost unit of which the enabling end is connected with the output end of the comparison unit, the input end is connected with the battery and the output end is connected with the power supply management unit, wherein the boost unit is used for rising and outputting the battery voltage based on the enabling signal; a time delay unit in parallel connection between the output end of the battery and the output end of the boost unit and used for switching the voltage provided by the battery to the power supply management unit to the voltage provided by the boost unit to the power supply management unit after the boost unit boosts to a preset output voltage. According to the present invention, the endurance time of the electronic device can be prolonged.
Description
Technical field
The present invention relates to the power technique fields of electronic equipment, more particularly, to a kind of power-supply management system and method.
Background technology
The cruising time of electronic equipment is short to be one of most significant problems of impact Consumer's Experience.Intelligence is set
Standby (as mobile phone etc.) continuation of the journey is substantially 1 day, and user needs to be charged whenever and wherever possible.
It is true that the reason electronic equipment actively shuts down is the voltage that Power Management Unit therein can be provided by
The normal work of circuitry cannot be met, then electronic equipment arranges power-off operation according to this voltage, to protect
Hardware in electronic equipment.This shutdown voltage is in 3.5v.In fact, when cell voltage is equal to 3.5V
When, battery dump energy is probably the 5% of battery Full Charge Capacity.Taking the lithium battery of one piece of 3000mAH as a example,
The electricity being equivalent to 3000*5%=150mAH is not utilized.MP3 power consumption play by general mobile phone
30-50mA is it is seen then that 150mAH electricity can support broadcasting MP3 to reach 3-5 hour.How to utilize this portion
Divide battery electric quantity, to improve the cruising time of electronic equipment, be those skilled in the art's problem to be solved.
Content of the invention
The embodiment of the present invention provides a kind of power-supply management system and method, for solving in prior art due to electricity
When the cell voltage in pond is less than the running voltage of circuitry, battery cannot provide running voltage to lead to electronics
The problem of equipment shutdown.
The embodiment of the present invention employs the following technical solutions：
In a first aspect, providing a kind of power-supply management system, for comprising the electronics of battery and Power Management Unit
Equipment, including：Negative input end is connected with battery, the comparing unit of positive input terminal access predeterminated voltage, is used for
Enable letter is exported with the comparative result of described predeterminated voltage based on the cell voltage that described negative input end is received
Number；Enable Pin is connected with the outfan of described comparing unit, input is connected described battery, outfan connects
The boosting unit of described Power Management Unit, for being risen described cell voltage based on described enable signal
Height simultaneously exports；It is connected in parallel on the delay unit between the outfan of described battery and the outfan of boosting unit, use
Will be from described battery to described power management list after boosting to default output voltage in described boosting unit
Unit provides voltage switching to provide voltage to from described boosting unit to described Power Management Unit.
Preferably, described comparing unit includes：The bleeder circuit being connected with described battery.
Preferably, described delay unit includes：Delay circuit, including：Output all with described comparing unit
Input and Enable Pin and outfan that end is connected, for boosting to default output in described boosting unit
Cut-off signal is exported after voltage；First controlled switching circuit, including：Outfan with described delay circuit
Connected controlled end, connect the first end of outfan of described battery, connect the outfan of described boosting unit
The second end.
Preferably, described delay unit includes：Second controlled switching circuit, including：Defeated with described battery
Go out the end first end being connected, the second end being connected with the outfan of described boosting unit and controlled end；Relatively
Circuit, including：The negative input end being connected with the outfan of described battery and the outfan of described boosting unit
Connected positive input terminal, connect described 3rd controlled switch controlled end outfan.
Preferably, described power-supply management system also includes：Be connected to described battery and Power Management Unit it
Between voltage output unit.
Preferably, described boosting unit includes：It is connected between outfan and the ground wire of described boosting unit
Filtering circuit.
Second aspect, also provides a kind of electronic equipment, including：Battery, Power Management Unit, and as above
Arbitrary described power-supply management system.
3rd fermentation, also provides a kind of method for managing power supply, for comprising the shifting of battery and Power Management Unit
Dynamic equipment, methods described to be executed by any of the above-described power-supply management system, including：Based on being obtained from battery
Cell voltage and the comparative result of predeterminated voltage, output enables signal；Based on described enable signal by described electricity
Cell voltage is raised；After the process that described cell voltage is raised, will be to described power management
The cell voltage of unit output switches to the voltage after rising.
Preferably, described based on being obtained from the cell voltage of battery and the comparative result of predeterminated voltage, output makes
The mode of energy signal includes：Acquired cell voltage is carried out voltage division processing；By the voltage after partial pressure and in advance
If voltage is compared, and enable signal is exported according to comparative result.
Preferably, described after the process that described cell voltage is raised, will be to described power management
The mode that the cell voltage of unit output switches to the voltage after rising includes：Described cell voltage is being boosted
To output cut-off signal during default output voltage；Described battery and described electricity are disconnected based on described cut-off signal
Conducting relation between source control unit, and to the voltage after the output rising of described Power Management Unit.
Preferably, described after the process that described cell voltage is raised, will be to described power management
The mode that the cell voltage of unit output switches to the voltage after rising includes：Relatively described cell voltage and liter
Press through the voltage that journey is exported, voltage after described rising is higher than described cell voltage, then will be to described electricity
The cell voltage of source control unit output switches to the voltage after rising.
As described above, the power-supply management system of the present invention and method, have the advantages that：Monitoring battery
Voltage, and when cell voltage is less than predeterminated voltage, cell voltage is boosted, to realize when battery electricity
When pressure deficiency thinks that PMU and circuitry are powered, circuitry still can thus extend electricity with normal work
In the cruising time of sub- equipment, utilize between delay circuit delay switching battery and boosting unit during boosting
Power supply relation is it can be ensured that before boosting unit boosts to preset voltage value, PMU and circuitry still can be just
Often work；In addition, for the battery electricity preventing the predeterminated voltage of the positive input terminal of comparing unit from being exported by battery
Pressure affects and produces unstable magnitude of voltage, comprises bleeder circuit in described comparing unit, reduces by two with effective
Magnitude of voltage to be compared；Further, using delay circuit and the first controlled switching circuit, can be directed to different
The duration setting delay time of booster circuit boost process, shortens switching time as far as possible；Additionally, use comparing
Circuit and the second controlled switching circuit, adaptive can be carried widely using the boosting unit of different model
For delay duration.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, the embodiment of the present invention will be retouched below
In stating the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
Some embodiments of the present invention, for those of ordinary skill in the art, are not paying creative work
Under the premise of, content that can also be according to embodiments of the present invention obtains other accompanying drawings with these accompanying drawings.
Fig. 1 is the block diagram of an embodiment of the power-supply management system of the present invention.
Fig. 2 is the block diagram of another embodiment of the power-supply management system of the present invention.
Fig. 3 is the flow chart of an embodiment of the method for managing power supply of the present invention.
Specific embodiment
For make present invention solves the technical problem that, the technical scheme that adopts and the technique effect that reaches clearer,
Below in conjunction with accompanying drawing, the technical scheme of the embodiment of the present invention is described in further detail it is clear that being retouched
The embodiment stated is only a part of embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other reality that those skilled in the art are obtained under the premise of not making creative work
Apply example, broadly fall into the scope of protection of the invention.
Embodiment one
As shown in figure 1, the present invention provides a kind of power-supply management system.Described power-supply management system 1 is peace
Dress comprises circuit, even soft between battery 2 and Power Management Unit (PMU) 3 in the electronic device
The system 1 of part.Wherein, described Power Management Unit 3 has multiple inputs and multiple outfan, institute
State input and can receive cell voltage from battery, described outfan connect the circuit unit of required power supply/
Chip.Because the supply voltage of described circuit unit/chip is incomplete same, so, described power management
Unit 3 can carry out corresponding step-up/down process for received voltage.
Described electronic equipment refers to chip/circuit unit that is battery-powered and comprising different power voltage
Equipment, it includes but is not limited to：Mobile phone, panel computer, notebook computer, Wearable electronic equipment
Deng.
Described power-supply management system 1 includes：Comparing unit 11, boosting unit 12, delay unit 13.
Described comparing unit 11 negative input end is connected with battery, positive input terminal accesses predeterminated voltage, for being based on
The cell voltage that described negative input end is received to export enable signal with the comparative result of described predeterminated voltage.
Here, the negative input end of described comparing unit 11 and positive input terminal can be the negative input of comparator therein
End and positive input terminal.As shown in Figure 2.
Wherein, described predeterminated voltage can be by being wanted defeated according to the PMU that described power-supply management system 1 is connected
Magnitude of voltage obtained by the difference of the supply voltage going out and described boosting unit 12 boosting amplitude.For example, described
The supply voltage that PMU is exported is 3.5v, and described boosting unit 12 boosting amplitude is 0.1v, then described default
Voltage is 3.4v.That is, when the supply voltage that the negative input end of described comparator is received is less than 3.4v
When, described comparing unit 11 output enables signal, conversely, then not exporting.Wherein, described enable signal
Can be correspondingly arranged according to the significant level of connected Enable Pin.For example, the significant level of Enable Pin is
High level, when the voltage of the negative input end of described comparator is less than the voltage of positive input terminal, described comparator
The high level of output is described enable signal.And for example, the significant level of Enable Pin is low level, when described ratio
When the voltage of the relatively negative input end of device is less than the voltage of positive input terminal, described comparator exports high level, then institute
State and in comparing unit 11, be additionally provided with the phase inverter being connected with the outfan of described comparator, corresponded to final output
Low level enable signal.
Preferably, also include in described comparing unit 11：Bleeder circuit.
Described bleeder circuit is connected with the outfan of described battery and the negative input end of comparator, can be in proportion
The cell voltage that exported of battery described in partial pressure.The magnitude of voltage of predeterminated voltage so can be reduced.For example,
Described cell voltage is 3.5v, and described bleeder circuit is by cell voltage partial pressure 1/10 so that described comparator
The voltage that accepted of negative input end be 0.35v, accordingly, described predeterminated voltage only needs as 0.34v
Determine whether described cell voltage can provide the voltage of 3.5v for PMU.So, electricity can effectively be prevented
It is impossible to provide the situation of stable predeterminated voltage to occur during the not enough power supply of pond.
The Enable Pin of described boosting unit 12 is connected with the outfan of described comparing unit 11, input is connected
Described battery, outfan connect described Power Management Unit, for based on described enable signal by described battery
Voltage is raised and is exported.
Specifically, after described boosting unit 12 receives the enable signal that described comparing unit 11 is exported,
The cell voltage being inputted is raised and is exported according to default boosting amplitude.For example, described boosting is single
The default boosting 0.3v of unit 12, then be increased to 3.7v by the voltage of the 3.4v of input and export to described power supply pipe
Reason unit (i.e. PMU).Thus, each chip that the voltage conversion being received one-tenth is connected by described PMU/
The supply voltage of circuit unit.Because the voltage that described boosting unit 12 is exported is more than each chip/circuit unit
Supply voltage, so, cell voltage relatively low it is impossible to during direct normal power supply, in described electronic equipment
Each functional chip/circuit unit remain to normal work.
Here, described boosting unit 12 includes but is not limited to：Boost chip.
In order to prevent described boosting unit 12 in boost process produced shakiness burr voltage to PMU
Impact, be connected with the filtering circuit of ground connection in the outfan of described boosting unit 12.For example, described filtration
Circuit includes：Ground capacity.
The Enable Pin of described delay unit 13 connects the outfan of described comparing unit 11 and is connected in parallel on described
Between the outfan of the outfan of battery and boosting unit 12, for based on described enable signal, in described liter
Pressure unit 12 will provide electricity from described battery to described Power Management Unit after boosting to default output voltage
Crush-cutting shifts to provide voltage from described boosting unit 12 to described Power Management Unit.
Specifically, because described boosting unit 12 is from starting output voltage based on enable signal, until being exported
The voltage that reaches needed for PMU of voltage there is a fixed response time, in order to prevent PMU not to be provided that during this period
Stabilized power source, described delay unit 13 continues to be powered by described battery during this period, until described boosting unit
12 voltages being exported meet the power demands of PMU, then switch over.
Described delay unit 13 can arrange switching duration it is also possible to pass through circuit by way of software controls
Mode realizes above-mentioned functions.
Preferably, as shown in Fig. 2 described delay unit 13 includes：Delay circuit 131 and first is controlled
On-off circuit 132.
Described delay circuit 131 includes：The input that is all connected with the outfan of described comparing unit 11 and making
Energy end and outfan, disconnect for output after boosting to default output voltage in described boosting unit 12
Signal.
Specifically, the Enable Pin of described delay circuit 131 is receiving the outfan institute of described comparing unit 11
The timer starting when enabling signal within startup of output, when described timer countdown is to 0, output
Cut-off signal, and by described timer reset to initial time.Wherein, described initial time predeterminable for institute
State boosting unit 12 and boost to the time span needed for default output voltage.Described cut-off signal can be according to institute
Depending on stating the useful signal of controlled end of the first controlled switching circuit 132.For example, described first controlled switch
Controlled switch (as PMOS switch) is comprised, then described cut-off signal is high level in circuit 132.
Described first controlled switching circuit 132 includes：With being subject to that the outfan of described delay circuit 131 is connected
Control end, connect described battery the first end of outfan, connect described boosting unit 12 outfan second
End.
Here, described first controlled switching circuit 132 is before described delay circuit 131 output cut-off signal
In the conduction state, described first controlled switching circuit 132 in the conduction state is by the output of described battery
End is connected so that described PMU directly receives the cell voltage of described battery with the input of PMU.
When described controlled end receives cut-off signal, controlled in described first controlled switching circuit 132
Switch off, then the circuit connecting between described battery and PMU disconnects, then described PMU is by described
Boosting unit 12 is powered.
As another preferred version, described delay unit 13 includes：Second controlled switching circuit, compare
Circuit.
Described second controlled switching circuit includes：The first end being connected with the outfan of described battery with described
The second end and controlled end that the outfan of boosting unit 12 is connected.
Described comparison circuit includes：The negative input end being connected with the outfan of described battery and described boosting are single
The connected positive input terminal of the outfan of unit 12, the outfan of the controlled end of described 3rd controlled switch of connection.
Wherein, described second controlled switching circuit is before described comparison circuit output switching signal, by institute
State the outfan of battery and PMU conducting connects.Described comparison circuit obtains and comparative cell voltage in real time
The voltage being exported with boosting unit 12, when the voltage that described boosting unit 12 is exported is higher than described electricity
During cell voltage, described comparison circuit exports high level, and this high level controls described second controlled switching circuit
The conducting of battery and PMU is switched to the outfan of described boosting unit 12 and the conducting of PMU.
Further, since the power demands of different chip/circuit units in described electronic equipment are different,
The supply voltage very little of some chip/circuit units, need not be carried out the cell voltage of described battery at boosting
Reason, so, described power-supply management system 1 also includes：Be connected to described battery and Power Management Unit it
Between voltage output unit, for directly the cell voltage of described battery being transported to described Power Management Unit.
As shown in Fig. 2 the structure example of the power-supply management system 1 of the present invention is as follows：
Described power-supply management system 1 includes：Comparing unit 11, boosting unit 12 and delay unit 13, its
In, described delay unit 13 includes：Delay circuit 131 and the first controlled switching circuit 132.
The negative input end of described comparing unit 11 connects battery, positive input terminal connects predeterminated voltage, outfan
Connect the Enable Pin of boosting unit 12 and delay unit 13 respectively；The input of described delay circuit 131
Also connect the outfan of described comparing unit 11, the outfan of described delay circuit 131 connects described first
The controlled end of the PMOS switch in controlled switching circuit 132, described first controlled switching circuit 132 is even
It is connected between described battery and the outfan of boosting unit 12.Export effectively in described comparing unit 11
Before enabling signal, described first controlled switching circuit 132 turns on.
Based on above-mentioned annexation, the work process of described power-supply management system 1 is exemplified below：
When the cell voltage of battery is more than predeterminated voltage, described comparing unit 11 exports invalid enable letter
Number be low level, described boosting unit 12 do not work and described delay unit 13 in first controlled open
Close circuit 132 and turn on described battery and PMU.From described battery directly to each input of described PMU
Output cell voltage.
When the cell voltage of battery is less than predeterminated voltage, described comparing unit 11 exports effective enable to be believed
Number：High level.Described boosting unit 12 starts to export the voltage gradually rising from 0v；Meanwhile,
Described delay circuit 131 proceeds by countdown, and when countdown is to 0, described delay circuit 131 is defeated
Go out low level cut-off signal, then lead to described first controlled switching circuit 132 to disconnect, then by described
Boosting unit 12 continues to power to PMU.
When the cell voltage of battery is more than predeterminated voltage, described comparing unit 11 exports invalid enable letter
Number：Low level.Described boosting unit 12 does not work；Meanwhile, described delay circuit 131 does not work
And export low level so that described first controlled switch turns on to described first controlled switching circuit 132,
Then powered from described battery to PMU.
Embodiment two
As shown in figure 3, the present invention also provides a kind of battery management method.Described battery management method mainly by
Power-supply management system is executing.Described power-supply management system is arranged on and comprises battery and Power Management Unit
(PMU) in electronic equipment.Wherein, described Power Management Unit has multiple inputs and multiple defeated
Go out end, described input can receive the cell voltage from battery, described outfan connects required power supply
Circuit unit/chip.Because the supply voltage of described circuit unit/chip is incomplete same, so, institute
State Power Management Unit and can carry out corresponding step-up/down process for received voltage.
In step sl, described power-supply management system is based on the cell voltage being obtained from battery and predeterminated voltage
Comparative result, output enables signal.
Specifically, the cell voltage from battery can be turned by described power-supply management system using mode converter
Change the cell voltage of numeral into, and the cell voltage of described numeral be compared with default magnitude of voltage,
If the cell voltage from battery is more than predeterminated voltage, export invalid enable signal, conversely, then defeated
Go out effective enable signal.
Described power-supply management system can also be by the circuit unit comprising hardware, the unit even comprising software
Realize.Described power-supply management system comprises comparing unit, boosting unit and delay unit.
The negative input end of described comparing unit and positive input terminal can be the negative input end of comparator therein and just defeated
Enter end.As shown in Figure 2.
Wherein, described predeterminated voltage will be able to export by the PMU being connected according to described power-supply management system
Supply voltage boost with described boosting unit amplitude difference obtained by magnitude of voltage.For example, described PMU institute
The supply voltage of output is 3.5v, and described boosting unit boosting amplitude is 0.1v, then described predeterminated voltage is 3.4v.
That is, when the supply voltage that the negative input end of described comparator is received is less than 3.4v, described comparison
Unit output enables signal, conversely, then not exporting.Wherein, described enable signal can be according to connected
Enable Pin significant level being correspondingly arranged.For example, the significant level of Enable Pin is high level, when described
When the voltage of the negative input end of comparator is less than the voltage of positive input terminal, the high level of described comparator output is
Described enable signal.And for example, the significant level of Enable Pin is low level, when the negative input end of described comparator
Voltage be less than positive input terminal voltage when, described comparator exports high level, then in described comparing unit also
It is provided with the phase inverter being connected with the outfan of described comparator, low level enable signal is corresponded to final output.
Preferably, described step S1 includes：Step S11 and S12.
In step s 11, acquired cell voltage is carried out voltage division processing by described power-supply management system.
In step s 12, the voltage after partial pressure and predeterminated voltage are compared by described power-supply management system,
And enable signal is exported according to comparative result.
Specifically, also include in described comparing unit：Bleeder circuit.
Described bleeder circuit is connected with the outfan of described battery and the negative input end of comparator, can be in proportion
The cell voltage that exported of battery described in partial pressure.The magnitude of voltage of predeterminated voltage so can be reduced.For example,
Described cell voltage is 3.5v, and described bleeder circuit is by cell voltage partial pressure 1/10 so that described comparator
The voltage that accepted of negative input end be 0.35v, accordingly, described predeterminated voltage only needs as 0.34v
Determine whether described cell voltage can provide the voltage of 3.5v for PMU.So, electricity can effectively be prevented
It is impossible to provide the situation of stable predeterminated voltage to occur during the not enough power supply of pond.
In step s 12, described power-supply management system is based on described enable signal and gives described cell voltage
Raise.
Specifically, the Enable Pin of described boosting unit is connected with the outfan of described comparing unit, input connects
Connect described battery, outfan connects described Power Management Unit, for based on described enable signal by described electricity
Cell voltage is raised and is exported.
Specifically, after described boosting unit receives the enable signal that described comparing unit is exported, according to pre-
If boosting amplitude the cell voltage being inputted is raised and is exported.For example, described boosting unit is preset
Boosting 0.3v, then be increased to 3.7v by the voltage of the 3.4v of input and export to described Power Management Unit (i.e.
PMU).Thus, the voltage conversion being received is become the confession of each chip/circuit unit being connected by described PMU
Piezoelectric voltage.Because the voltage that described boosting unit is exported is more than the supply voltage of each chip/circuit unit, institute
With, cell voltage relatively low it is impossible to during direct normal power supply, each functional chip/electricity in described electronic equipment
Road unit remains to normal work.
Here, described boosting unit includes but is not limited to：Boost chip.
In order to prevent described boosting unit in boost process produced shakiness burr voltage to PMU's
Impact, described step S2 also includes：During being raised described cell voltage, to being exported
Voltage filtered.
Specifically, the outfan in described boosting unit is connected with the filtering circuit of ground connection.For example, described filtration
Circuit includes：Ground capacity, described ground capacity being capable of HFS in filtered voltage.
In step s3, described power-supply management system is after the process being raised described cell voltage,
The cell voltage exporting to described Power Management Unit is switched to the voltage after rising.
Specifically, the Enable Pin of described delay unit connects the outfan of described comparing unit and is connected in parallel on institute
State between the outfan of battery and the outfan of boosting unit, for based on described enable signal, in described liter
Pressure unit will provide voltage from described battery to described Power Management Unit after boosting to default output voltage
Switch to and provide voltage from described boosting unit to described Power Management Unit.
Specifically, because described boosting unit is from starting output voltage based on enable signal, up to exported
The voltage that voltage reaches needed for PMU has a fixed response time, in order to prevent PMU not to be provided that during this period surely
Determine power supply, described delay unit continues to be powered by described battery during this period, until described boosting unit institute is defeated
The voltage going out meets the power demands of PMU, then switches over.
Described delay unit can arrange switching duration it is also possible to by the side of circuit by way of software controls
Formula realizes above-mentioned functions.
Preferably, described step S3 includes：Step S31 and S32.
In step S31, described delay unit is when boosting to default output voltage by described cell voltage
Output cut-off signal.
In step s 32, described delay unit is based on the described cut-off signal described battery of disconnection and described power supply
Conducting relation between administrative unit, and to the voltage after the output rising of described Power Management Unit.
Specifically, as shown in Fig. 2 described delay unit includes：Delay circuit and the first controlled switch electricity
Road.
Described delay circuit includes：The input being all connected with the outfan of described comparing unit and Enable Pin,
And outfan, for exporting cut-off signal after boosting to default output voltage in described boosting unit.
The enable signal that the Enable Pin of described delay circuit is exported in the outfan receiving described comparing unit
When start to start internal timer, when described timer countdown is to 0, export cut-off signal, and general
Described timer reset is to initial time.Wherein, described initial time is predeterminable boosts for described boosting unit
To the time span needed for default output voltage.Described cut-off signal can be according to described first controlled switch electricity
Depending on the useful signal of the controlled end on road.For example, comprise controlled switch (such as in described first controlled switching circuit
PMOS switch), then described cut-off signal is high level.
Described first controlled switching circuit includes：The controlled end that is connected with the outfan of described delay circuit, even
Connect first end, second end of the outfan of the described boosting unit of connection of the outfan of described battery.
Here, described first controlled switching circuit was on before described delay circuit output cut-off signal
State, described first controlled switching circuit in the conduction state is defeated by the outfan of described battery and PMU's
Enter end connection so that described PMU directly receives the cell voltage of described battery.
Controlled switch when described controlled end receives cut-off signal, in described first controlled switching circuit
Disconnect, then the circuit connecting between described battery and PMU disconnects, then described PMU is by described boosting
Unit is powered.
As another preferred version, described step S3 can also include：Step S33.
In step S33, the voltage that the more described cell voltage of described delay unit is exported with boost process,
Voltage after described rising is higher than described cell voltage, then the battery that will export to described Power Management Unit
Voltage switching becomes the voltage after raising.
Specifically, described delay unit includes：Second controlled switching circuit, comparison circuit.
Described second controlled switching circuit includes：The first end being connected with the outfan of described battery with described
The second end and controlled end that the outfan of boosting unit is connected.
Described comparison circuit includes：The negative input end being connected with the outfan of described battery and described boosting are single
The connected positive input terminal of the outfan of unit, the outfan of the controlled end of described 3rd controlled switch of connection.
Wherein, described second controlled switching circuit is before described comparison circuit output switching signal, by institute
State the outfan of battery and PMU conducting connects.Described comparison circuit obtains and comparative cell voltage in real time
The voltage being exported with boosting unit, when the voltage that described boosting unit is exported is higher than described cell voltage
When, described comparison circuit exports high level, and this high level controls described second controlled switching circuit by battery
Conducting with PMU switches to the outfan of described boosting unit and the conducting of PMU.So achieve
Switching between cell voltage and boosting unit for the input voltage of PMU.
In sum, the power-supply management system of the present invention and method, by monitoring cell voltage, and works as battery
When voltage is less than predeterminated voltage, cell voltage is boosted, to realize thinking PMU when cell voltage deficiency
And circuitry is when powering, when circuitry still with normal work, can thus extend the continuation of the journey of electronic equipment
Between, utilize the power supply relation between delay circuit delay switching battery and boosting unit during boosting, can
Guarantee before boosting unit boosts to preset voltage value, PMU and circuitry still can normal works；In addition,
Produced not in order to the cell voltage that the predeterminated voltage preventing the positive input terminal of comparing unit is exported by battery is affected
Stable magnitude of voltage, comprises bleeder circuit in described comparing unit, reduces by two magnitudes of voltage to be compared with effective；
Further, using delay circuit and the first controlled switching circuit, can be for different booster circuit boost process
Duration setting delay time, as far as possible shorten switching time；Additionally, opening using comparison circuit and second are controlled
Close circuit, can be widely using the boosting unit of different model, adaptive offer delay duration.So,
The present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
Above-described embodiment only principle of the illustrative present invention and its effect, not for the restriction present invention.
Any person skilled in the art all can enter to above-described embodiment without prejudice under the spirit and the scope of the present invention
Row modifications and changes.Therefore, such as those of ordinary skill in the art without departing from institute of the present invention
All equivalent modifications being completed under the spirit disclosing and technological thought or change, must be by the right of the present invention
Require to be covered.
Claims (11)
1. a kind of power-supply management system, for comprising the electronic equipment of battery and Power Management Unit, its feature exists
In, including：
Negative input end is connected with battery, the comparing unit of positive input terminal access predeterminated voltage, for based on described
The cell voltage that negative input end is received to export enable signal with the comparative result of described predeterminated voltage；
Enable Pin is connected with the outfan of described comparing unit, input is connected described battery, outfan connects
The boosting unit of described Power Management Unit, for being risen described cell voltage based on described enable signal
Height simultaneously exports；
It is connected in parallel on the delay unit between the outfan of described battery and the outfan of boosting unit, in institute
State and will be provided to described Power Management Unit from described battery after boosting unit boosts to default output voltage
Voltage switching provides voltage to from described boosting unit to described Power Management Unit.
2. power-supply management system according to claim 1 is it is characterised in that described comparing unit includes：
The bleeder circuit being connected with described battery.
3. power-supply management system according to claim 1 is it is characterised in that described delay unit includes：
Delay circuit, including：The input being all connected with the outfan of described comparing unit and Enable Pin and
Outfan, for exporting cut-off signal after boosting to default output voltage in described boosting unit；
First controlled switching circuit, including：The controlled end that is connected with the outfan of described delay circuit, it is connected
The first end of the outfan of described battery, the second end of the outfan of the described boosting unit of connection.
4. power-supply management system according to claim 1 is it is characterised in that described delay unit includes：
Second controlled switching circuit, including：The first end being connected with the outfan of described battery and described liter
The second end and controlled end that the outfan of pressure unit is connected；
Comparison circuit, including：The negative input end being connected with the outfan of described battery and described boosting unit
Outfan be connected positive input terminal, connect described 3rd controlled switch controlled end outfan.
5. power-supply management system according to claim 1 is it is characterised in that also include：It is connected to and institute
State the voltage output unit between battery and Power Management Unit.
6. power-supply management system according to claim 1 is it is characterised in that described boosting unit includes：
It is connected to the filtering circuit between the outfan of described boosting unit and ground wire.
7. a kind of electronic equipment is it is characterised in that include：
Battery, Power Management Unit, and as described power-supply management system arbitrary in claim 1-6.
8. a kind of method for managing power supply, for comprising the electronic equipment of battery and Power Management Unit, its feature exists
In, including：
Based on being obtained from the cell voltage of battery and the comparative result of predeterminated voltage, output enables signal；
Based on described enable signal, described cell voltage is raised；
After the process that described cell voltage is raised, the electricity that will export to described Power Management Unit
Cell voltage switches to the voltage after rising.
9. method for managing power supply according to claim 8 it is characterised in that described based on being obtained from battery
Cell voltage and predeterminated voltage comparative result, output enable signal mode include：
Acquired cell voltage is carried out voltage division processing；
Voltage after partial pressure and predeterminated voltage are compared, and enable signal is exported according to comparative result.
10. method for managing power supply according to claim 8 it is characterised in that described by described battery electricity
After pressing the process being raised, the cell voltage exporting to described Power Management Unit is switched to after rising
The mode of voltage include：
Export cut-off signal when described cell voltage is boosted to default output voltage；
Conducting relation between described battery and described Power Management Unit is disconnected based on described cut-off signal, and
Voltage after raising to the output of described Power Management Unit.
11. method for managing power supply according to claim 8 it is characterised in that described by described battery electricity
After pressing the process being raised, the cell voltage exporting to described Power Management Unit is switched to after rising
The mode of voltage include：
The voltage that relatively described cell voltage and boost process are exported, voltage after described rising is higher than institute
State cell voltage, then the cell voltage exporting to described Power Management Unit is switched to the voltage after rising.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113012611A (en) * | 2021-02-26 | 2021-06-22 | 深圳市华星光电半导体显示技术有限公司 | Voltage detection circuit, display device and display driving method thereof |
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| CN101834319A (en) * | 2010-03-10 | 2010-09-15 | 青岛海信电器股份有限公司 | Power supply management method and device and electronic equipment |
| US20100253147A1 (en) * | 2009-03-30 | 2010-10-07 | Encell Technology Llc | Parallel Power Back-Up System |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100253147A1 (en) * | 2009-03-30 | 2010-10-07 | Encell Technology Llc | Parallel Power Back-Up System |
| CN101834319A (en) * | 2010-03-10 | 2010-09-15 | 青岛海信电器股份有限公司 | Power supply management method and device and electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113012611A (en) * | 2021-02-26 | 2021-06-22 | 深圳市华星光电半导体显示技术有限公司 | Voltage detection circuit, display device and display driving method thereof |
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Application publication date: 20170215 Assignee: Shanghai Li Ke Semiconductor Technology Co., Ltd. Assignor: Leadcore Technology Co., Ltd. Contract record no.: 2018990000159 Denomination of invention: Power-supply management system and method for mobile terminal equipment License type: Common License Record date: 20180615 |
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