CN106410871B - Power-supply management system and method - Google Patents
Power-supply management system and method Download PDFInfo
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- CN106410871B CN106410871B CN201510422358.8A CN201510422358A CN106410871B CN 106410871 B CN106410871 B CN 106410871B CN 201510422358 A CN201510422358 A CN 201510422358A CN 106410871 B CN106410871 B CN 106410871B
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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
Abstract
The present invention provides a kind of power-supply management system and method, to contain the electronic equipment of battery and Power Management Unit.It is connected the system comprises: negative input end with battery, the comparing unit of positive input terminal access predeterminated voltage, for exporting enable signal based on the comparison result of the negative input end received cell voltage of institute and the predeterminated voltage；Enable end and the output end of the comparing unit are connected, input terminal connect the battery, output end connects the boosting unit of the Power Management Unit, for the cell voltage to be increased and exported based on the enable signal；The delay unit being connected in parallel between the output end of the battery and the output end of boosting unit switches to from the boosting unit to the Power Management Unit for will provide voltage from the battery to the Power Management Unit after the boosting unit boosts to preset output voltage and provides voltage.The present invention has been able to extend the cruise duration of electronic equipment.
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 methods.
Background technique
The short cruise duration of electronic equipment has been one of the most significant problems for influencing user experience.(such as smart machine
Mobile phone etc.) continuation of the journey substantially 1 day, user needs to charge whenever and wherever possible.
In fact, the reason of electronic equipment actively shuts down is that the voltage that Power Management Unit therein can be provided can not expire
The normal work of sufficient circuitry, then power-off operation is arranged according to this voltage in electronic equipment, to protect the hardware in electronic equipment.
This shutdown voltage is in 3.5v or so.In fact, battery dump energy is probably the full electricity of battery when cell voltage is equal to 3.5V
The 5% of amount.By taking the lithium battery of one piece of 3000mAH as an example, the electricity for being equivalent to 3000*5%=150mAH is not utilized.Generally
It is 30-50mA that mobile phone, which plays MP3 power consumption, it is seen then that 150mAH electricity, which can support, played MP3 up to 3-5 hours.How this portion is utilized
Point battery capacity is those skilled in the art's problem to be solved to improve the cruise duration of electronic equipment.
Summary of the invention
The embodiment of the present invention provides a kind of power-supply management system and method, for solving the electricity due to battery in the prior art
When cell voltage is lower than the operating voltage of circuitry, the problem of battery can not provide operating voltage and electronic equipment is caused to shut down.
The embodiment of the present invention uses following technical scheme:
In a first aspect, a kind of power-supply management system is provided, to contain the electronic equipment of battery and Power Management Unit, packet
Include: negative input end is connected with battery, positive input terminal accesses the comparing unit of predeterminated voltage, for being connect based on the negative input end
The comparison result of the cell voltage of receipts and the predeterminated voltage exports enable signal；The output of enable end and the comparing unit
End is connected, input terminal connects the battery, output end connects the boosting unit of the Power Management Unit, for being made based on described
The cell voltage is increased and is exported by energy signal；Be connected in parallel on the battery output end and boosting unit output end it
Between delay unit, for will be from the battery to the power supply after the boosting unit boosts to preset output voltage
Administrative unit offer voltage, which is switched to from the boosting unit to the Power Management Unit, provides voltage.
Preferably, the comparing unit includes: the bleeder circuit being connected with the battery.
Preferably, the delay unit includes: delay circuit, comprising: is connected with the output end of the comparing unit
Input terminal and enable end and output end, for the output disconnection letter after the boosting unit boosts to preset output voltage
Number；First controlled switching circuit, comprising: with the output end of the delay circuit be connected controlled end, connect the defeated of the battery
First end, the second end of the output end of the connection boosting unit of outlet.
Preferably, the delay unit includes: the second controlled switching circuit, comprising: is connected with the output end of the battery
First end, the second end that is connected with the output end of the boosting unit and controlled end；Comparison circuit, comprising: with the battery
The connected negative input end of output end, the positive input terminal connected with the output end of the boosting unit, to connect described second controlled
The output end of the controlled end of switch.
Preferably, the power-supply management system further include: the electricity being connected between the battery and Power Management Unit
Press output unit.
Preferably, the boosting unit includes: the filtering electricity being connected between the output end and ground wire of the boosting unit
Road.
Second aspect, also offer a kind of electronic equipment, comprising: battery, Power Management Unit, and it is as above any described
Power-supply management system.
Third fermentation, also provides a kind of method for managing power supply, to contain the mobile device of battery and Power Management Unit,
The method is executed by any of the above-described power-supply management system, comprising: based on the cell voltage and predeterminated voltage for being obtained from battery
Comparison result, export enable signal；The cell voltage is increased based on the enable signal；The battery is electric
After pressure gives raised process, the cell voltage exported to the Power Management Unit is switched into the voltage after increasing.
Preferably, the comparison result based on the cell voltage and predeterminated voltage that are obtained from battery exports enable signal
Mode include: that acquired cell voltage is subjected to voltage division processing；Voltage after partial pressure is compared with predeterminated voltage, and
Enable signal is exported according to comparison result.
Preferably, described after the cell voltage is given raised process, it will be defeated to the Power Management Unit
The mode that cell voltage out switches to the voltage after increasing includes: that the cell voltage is being boosted to preset output voltage
When export cut-off signal；The conducting relationship between the battery and the Power Management Unit is disconnected based on the cut-off signal,
And the voltage after being increased to Power Management Unit output.
Preferably, described after the cell voltage is given raised process, it will be defeated to the Power Management Unit
The electricity that the mode that cell voltage out switches to the voltage after increasing includes: cell voltage described in comparison and boost process is exported
Pressure, the voltage after raising are higher than the cell voltage, then cut the cell voltage exported to the Power Management Unit
Change the voltage after increasing into.
As described above, power-supply management system and method for the invention, have the advantages that monitoring cell voltage, and
It when cell voltage is lower than predeterminated voltage, boosts to cell voltage, to realize when cell voltage deficiency thinks PMU and complete machine
When circuit is powered, circuitry still be can work normally, and thus extends the cruise duration of electronic equipment, utilizes during boosting
Power supply relationship between delay circuit delay switching battery and boosting unit, it can be ensured that boost to predeterminated voltage in boosting unit
Before value, PMU and circuitry can still be worked normally；In addition, the predeterminated voltage of the positive input terminal of comparing unit is by electricity in order to prevent
The cell voltage of pond output influences and generates unstable voltage value, includes bleeder circuit in the comparing unit, effectively to drop
Low two voltage values to be compared；In addition, different booster circuits can be directed to using delay circuit and the first controlled switching circuit
Delay time is arranged in the duration of boost process, as far as possible shortening switching time；In addition, using comparison circuit and the second controlled switch electricity
Road can widely use the boosting unit of different model, adaptive offer delay duration.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also implement according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is the structural block diagram of one embodiment of power-supply management system of the invention.
Fig. 2 is the structural block diagram of another embodiment of power-supply management system of the invention.
Fig. 3 is the flow chart of one embodiment of method for managing power supply of the invention.
Specific embodiment
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
It will the technical scheme of the embodiment of the invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment one
As shown in Figure 1, the present invention provides a kind of power-supply management system.The power-supply management system 1 is to be mounted on electronics to set
The system 1 comprising circuit, even software between standby middle battery 2 and Power Management Unit (PMU) 3.Wherein, the power management
Unit 3 has multiple input terminals and multiple output ends, and the input terminal can receive the cell voltage from battery, the output end
Circuit unit/the chip powered needed for connection.Since the supply voltage of the circuit unit/chip is not exactly the same, so, institute
Corresponding step-up/down processing can be carried out for the received voltage of institute by stating Power Management Unit 3.
The electronic equipment refers to chip/circuit unit equipment that is being battery powered and including different power voltage,
It includes but is not limited to: mobile phone, tablet computer, laptop, wearable electronic equipment etc..
The power-supply management system 1 includes: comparing unit 11, boosting unit 12, delay unit 13.
11 negative input end of comparing unit is connected with battery, positive input terminal accesses predeterminated voltage, for based on described negative
Input terminal the comparison result of received cell voltage and the predeterminated voltage export enable signal.
Here, the negative input end and positive input terminal of the comparing unit 11 can be the negative input end and just of comparator therein
Input terminal.As shown in Figure 2.
Wherein, the predeterminated voltage can the power-supply management system 1 is connected according to PMU power supply to be output
The obtained voltage value of difference of voltage and the boosting unit 12 boosting amplitude.For example, the supply voltage that the PMU is exported is
3.5v, the boosting unit 12 boost amplitude as 0.1v, then the predeterminated voltage is 3.4v.That is, working as the comparator
Negative input end institute received supply voltage when being less than 3.4v, the comparing unit 11 exports enable signal, conversely, then not defeated
Out.Wherein, the enable signal can be correspondingly arranged according to the significant level of enable end connected to it.For example, enable end
Significant level is high level, when the voltage of the negative input end of the comparator is lower than the voltage of positive input terminal, the comparator
The high level of output is the enable signal.For another example, the significant level of enable end is low level, when the negative input of the comparator
When the voltage at end is lower than the voltage of positive input terminal, the comparator exports high level, then be additionally provided in the comparing unit 11 with
The connected phase inverter of the output end of the comparator, corresponds to low level enable signal with final output.
Preferably, in the comparing unit 11 further include: bleeder circuit.
The bleeder circuit is connected with the negative input end of the output end of the battery and comparator, can partial pressure institute in proportion
State the cell voltage that battery is exported.The voltage value of predeterminated voltage can so be reduced.For example, the cell voltage is 3.5v, institute
It states bleeder circuit and cell voltage is divided 1/10, so that the voltage that the negative input end of the comparator is received is 0.35v, accordingly
, the predeterminated voltage only needs to can determine whether the cell voltage can provide the voltage of 3.5v for PMU for 0.34v.Such as
This, when can effectively prevent battery capacity deficiency, the case where stable predeterminated voltage can not be provided generation.
The enable end of the boosting unit 12 is connected with the output end of the comparing unit 11, input terminal connect the electricity
Pond, output end connect the Power Management Unit, for being increased the cell voltage and defeated based on the enable signal
Out.
Specifically, after the boosting unit 12 receives the enable signal that the comparing unit 11 is exported, according to default
Boosting amplitude the cell voltage inputted is increased and is exported.For example, the default boosting 0.3v of the boosting unit 12, then
The voltage of the 3.4v of input is increased to 3.7v and is exported to the Power Management Unit (i.e. PMU).The PMU is by institute as a result,
Received voltage is converted into the supply voltage of each chip/circuit unit connected.It is exported by the boosting unit 12
Voltage be greater than each chip/circuit unit supply voltage, so, it is lower in cell voltage, can not direct normal power supply when, it is described
Each functional chip/circuit unit in electronic equipment remains to work normally.
Here, the boosting unit 12 includes but is not limited to: boost chip.
The boosting unit 12 influence of generated shakiness burr voltage to PMU in boost process in order to prevent,
The output end of the boosting unit 12 is connected with the filtering circuit of ground connection.For example, the filtering circuit includes: ground capacity.
The enable end of the delay unit 13 connects the output end of the comparing unit 11 and is connected in parallel on the defeated of the battery
Between outlet and the output end of boosting unit 12, for being based on the enable signal, boosted in the boosting unit 12 default
Output voltage after will from the battery to the Power Management Unit provide voltage switch to from the boosting unit 12 to
The Power Management Unit provides voltage.
Specifically, since the boosting unit 12 is since based on output voltage enable signal, until the voltage exported
Voltage needed for reaching PMU has a fixed response time, and PMU cannot provide stabilized power supply during this period in order to prevent, and the delay is single
Member 13 continues to be powered by the battery during this period, until the voltage that the boosting unit 12 is exported meets the power supply need of PMU
It asks, then switches over.
Switching duration can be arranged in the delay unit 13 by way of software control, can also be real by way of circuit
Existing above-mentioned function.
Preferably, as shown in Fig. 2, the delay unit 13 includes: delay circuit 131 and the first controlled switching circuit
132。
The delay circuit 131 include: the input terminal that the equal output end with the comparing unit 11 is connected and enable end and
Output end, for exporting cut-off signal after the boosting unit 12 boosts to preset output voltage.
Specifically, the enable end of the delay circuit 131 is exported in the output end for receiving the comparing unit 11
Start starting internal timer when enable signal, when the timer countdown is to 0, export cut-off signal, and will described in
Timer reset is to initial time.Wherein, the initial time can be preset as the boosting unit 12 and boost to preset output
Time span needed for voltage.The cut-off signal can be according to effective letter of the controlled end of first controlled switching circuit 132
Depending on number.For example, including controlled switch (such as PMOS switch), the then cut-off signal in first controlled switching circuit 132
For high level.
First controlled switching circuit 132 includes: the controlled end being connected with the output end of the delay circuit 131, connects
Connect the second end of the first end of the output end of the battery, the output end of the connection boosting unit 12.
Here, first controlled switching circuit 132 is on before the delay circuit 131 exports cut-off signal
State, first controlled switching circuit 132 in the conductive state connect the input terminal of the output end of the battery and PMU
It is logical, so that the PMU directly receives the cell voltage of the battery.
When the controlled end receives cut-off signal, the controlled switch in first controlled switching circuit 132 is disconnected,
The circuit being then connected between the battery and PMU disconnects, then the PMU is powered by the boosting unit 12.
As another preferred embodiment, the delay unit 13 includes: the second controlled switching circuit, comparison circuit.
Second controlled switching circuit includes: that the first end being connected with the output end of the battery and the boosting are single
The connected second end of the output end of member 12 and controlled end.
The comparison circuit includes: the negative input end being connected with the output end of the battery and the boosting unit 12
The output end of the controlled end of positive input terminal, connection second controlled switch that output end is connected.
Wherein, second controlled switching circuit is before the comparison circuit exports switching signal, by the battery
Output end and PMU conducting connection.The electricity that the comparison circuit obtains in real time and comparative cell voltage and boosting unit 12 are exported
Pressure, when the voltage that the boosting unit 12 is exported is higher than the cell voltage, the comparison circuit exports high level, the height
Level control second controlled switching circuit by the conducting of battery and PMU switch to the output end of the boosting unit 12 with
The conducting of PMU.
In addition, since the power demands of different chip/circuit units in the electronic equipment are different, some cores
Piece/circuit unit supply voltage very little, it is not necessary that the cell voltage of the battery is carried out boosting processing, so, the power supply
Management system 1 further include: the voltage output unit being connected between the battery and Power Management Unit, for directly by institute
The cell voltage for stating battery transports to the Power Management Unit.
As shown in Fig. 2, the structure example of power-supply management system 1 of the invention is as follows:
The power-supply management system 1 includes: comparing unit 11, boosting unit 12 and delay unit 13, wherein the delay
Unit 13 includes: delay circuit 131 and the first controlled switching circuit 132.
Negative input end connection battery, positive input terminal connection predeterminated voltage, the output end of the comparing unit 11 are separately connected
The enable end of boosting unit 12 and delay unit 13；The input terminal of the delay circuit 131 also connects the comparing unit 11
Output end, the output end of the delay circuit 131 connect the controlled of the PMOS switch in first controlled switching circuit 132
End, first controlled switching circuit 132 are connected between the battery and the output end of boosting unit 12.Described relatively more single
Before the 11 effective enable signal of output of member, first controlled switching circuit 132 is connected.
Based on above-mentioned connection relationship, the course of work of the power-supply management system 1 is exemplified below:
When the cell voltage of battery is greater than predeterminated voltage, it is low electricity that the comparing unit 11, which exports invalid enable signal,
It is flat, the boosting unit 12 does not work and the first controlled switching circuit 132 in the delay unit 13 be connected the battery with
PMU.Cell voltage is directly exported to each input terminal of the PMU from the battery.
When the cell voltage of battery is less than predeterminated voltage, the comparing unit 11 exports effective enable signal: high electricity
It is flat.The boosting unit 12 exports the voltage gradually risen since 0v；At the same time, the delay circuit 131 starts to carry out
Countdown, when countdown is to 0, the delay circuit 131 exports low level cut-off signal, then causes described first controlled to open
Powered-down road 132 disconnects, then continues to power to PMU from the boosting unit 12.
When the cell voltage of battery is greater than predeterminated voltage, the comparing unit 11 exports invalid enable signal: low electricity
It is flat.The boosting unit 12 does not work；At the same time, the delay circuit 131 does not work and to first controlled switch electricity
Road 132 exports low level, so that first controlled switch is connected, then is powered from the battery to PMU.
Embodiment two
As shown in figure 3, the present invention also provides a kind of battery management methods.The battery management method is mainly by power management
System executes.The power-supply management system is mounted in the electronic equipment comprising battery and Power Management Unit (PMU).Its
In, the Power Management Unit has multiple input terminals and multiple output ends, and the input terminal can receive the battery from battery
Voltage, the circuit unit/chip powered needed for the output end connection.Due to the circuit unit/chip supply voltage not
It is identical, so, the Power Management Unit can carry out corresponding step-up/down processing for the received voltage of institute.
In step sl, comparison knot of the power-supply management system based on the cell voltage and predeterminated voltage for being obtained from battery
Fruit exports enable signal.
Specifically, the cell voltage from battery can be converted into number using mode converter by the power-supply management system
Cell voltage, and the cell voltage of the number is compared with preset voltage value, if the cell voltage from battery
Greater than predeterminated voltage, then invalid enable signal is exported, conversely, then exporting effective enable signal.
The power-supply management system can also be by the circuit unit comprising hardware, even the unit comprising software be realized.
The power-supply management system includes comparing unit, boosting unit and delay unit.
The negative input end and positive input terminal of the comparing unit can be the negative input end and positive input terminal of comparator therein.
As shown in Figure 2.
Wherein, the predeterminated voltage can the power-supply management system is connected according to PMU power supply to be output
The obtained voltage value of difference of voltage and boosting unit boosting amplitude.For example, the supply voltage that the PMU is exported is
3.5v, the boosting unit boosting amplitude is 0.1v, then the predeterminated voltage is 3.4v.That is, when the comparator
When the received supply voltage of negative input end institute is less than 3.4v, the comparing unit exports enable signal, conversely, then not exporting.
Wherein, the enable signal can be correspondingly arranged according to the significant level of enable end connected to it.For example, enable end is effective
Level is high level, when the voltage of the negative input end of the comparator is lower than the voltage of positive input terminal, the comparator output
High level be the enable signal.For another example, the significant level of enable end is low level, when the negative input end of the comparator
When voltage is lower than the voltage of positive input terminal, the comparator exports high level, then is additionally provided in the comparing unit and the ratio
The phase inverter connected compared with the output end of device, corresponds to low level enable signal with final output.
It preferably, include: step S11 and S12 in the step S1.
In step s 11, acquired cell voltage is carried out voltage division processing by the power-supply management system.
In step s 12, the voltage after partial pressure is compared by the power-supply management system with predeterminated voltage, and according to than
Relatively result exports enable signal.
Specifically, in the comparing unit further include: bleeder circuit.
The bleeder circuit is connected with the negative input end of the output end of the battery and comparator, can partial pressure institute in proportion
State the cell voltage that battery is exported.The voltage value of predeterminated voltage can so be reduced.For example, the cell voltage is 3.5v, institute
It states bleeder circuit and cell voltage is divided 1/10, so that the voltage that the negative input end of the comparator is received is 0.35v, accordingly
, the predeterminated voltage only needs to can determine whether the cell voltage can provide the voltage of 3.5v for PMU for 0.34v.Such as
This, when can effectively prevent battery capacity deficiency, the case where stable predeterminated voltage can not be provided generation.
In step s 12, the power-supply management system is increased the cell voltage based on the enable signal.
Specifically, described in the enable end of the boosting unit is connected with the output end of the comparing unit, input terminal is connect
Battery, output end connect the Power Management Unit, for being increased the cell voltage simultaneously based on the enable signal
Output.
Specifically, after the boosting unit receives the enable signal that the comparing unit is exported, according to preset liter
The cell voltage inputted is increased and is exported by pressure amplitude value.For example, the default boosting 0.3v of the boosting unit, then it will input
The voltage of 3.4v be increased to 3.7v and export to the Power Management Unit (i.e. PMU).The PMU is received by institute as a result,
Voltage is converted into the supply voltage of each chip/circuit unit connected.Since the voltage that the boosting unit is exported is greater than
The supply voltage of each chip/circuit unit, so, it is lower in cell voltage, can not direct normal power supply when, the electronic equipment
In each functional chip/circuit unit remain to work normally.
Here, the boosting unit includes but is not limited to: boost chip.
The boosting unit influence of generated shakiness burr voltage to PMU in boost process in order to prevent, it is described
Step S2 further include: during the cell voltage is given raised, the voltage exported is filtered.
Specifically, the filtering circuit of ground connection is connected in the output end of the boosting unit.For example, the filtering circuit packet
Include: ground capacity, the ground capacity being capable of high frequency section in filtered voltage.
In step s3, the power-supply management system, will be to institute after the cell voltage is given raised process
The cell voltage for stating Power Management Unit output switches to the voltage after increasing.
Specifically, the enable end of the delay unit connects the output end of the comparing unit and is connected in parallel on the battery
Output end and boosting unit output end between, for be based on the enable signal, boosted in the boosting unit default
Output voltage after will provide voltage to the Power Management Unit from the battery and switch to from the boosting unit to institute
It states Power Management Unit and voltage is provided.
Specifically, since the boosting unit is since based on output voltage enable signal, until the voltage exported reaches
Voltage needed for PMU has a fixed response time, and PMU cannot provide stabilized power supply, the delay unit during this period in order to prevent
Continue to be powered by the battery during this period, until the voltage that is exported of the boosting unit meets the power demands of PMU, then into
Row switching.
Switching duration can be arranged in the delay unit by way of software control, can also be realized by way of circuit
Above-mentioned function.
Preferably, the step S3 includes: step S31 and S32.
In step S31, the delay unit exports disconnected when the cell voltage is boosted to preset output voltage
ON signal.
In step s 32, the delay unit is based on the cut-off signal and disconnects the battery and the power management list
Conducting relationship between member, and the voltage after increasing is exported to the Power Management Unit.
Specifically, as shown in Fig. 2, the delay unit includes: delay circuit and the first controlled switching circuit.
The delay circuit includes: the input terminal that the equal output end with the comparing unit is connected and enable end and output
End, for exporting cut-off signal after the boosting unit boosts to preset output voltage.
It is opened in the enable signal that the output end for receiving the comparing unit is exported the enable end of the delay circuit
Begin the internal timer of starting, when the timer countdown is to 0, output cut-off signal, and extremely by the timer reset
Initial time.Wherein, the initial time can be preset as the time needed for the boosting unit boosts to preset output voltage
Length.The cut-off signal can be depending on the useful signal of the controlled end of first controlled switching circuit.For example, described
It include controlled switch (such as PMOS switch) that then the cut-off signal is high level in one controlled switching circuit.
First controlled switching circuit includes: the controlled end being connected with the output end of the delay circuit, described in connection
First end, the second end of the output end of the connection boosting unit of the output end of battery.
Here, first controlled switching circuit is in the conductive state before the delay circuit exports cut-off signal,
The output end of the battery is connected to by first controlled switching circuit in the conductive state with the input terminal of PMU, so that institute
State the cell voltage that PMU directly receives the battery.
When the controlled end receives cut-off signal, the controlled switch in first controlled switching circuit is disconnected, then
The circuit being connected between the battery and PMU disconnects, then the PMU is powered by the boosting unit.
As another preferred embodiment, the step S3 can also include: step S33.
In step S33, the voltage that the delay unit cell voltage and boost process are exported, when described
Voltage after raising is higher than the cell voltage, then after the cell voltage exported to the Power Management Unit being switched to raising
Voltage.
Specifically, the delay unit includes: the second controlled switching circuit, comparison circuit.
Second controlled switching circuit includes: that the first end being connected with the output end of the battery and the boosting are single
The connected second end of the output end of member and controlled end.
The comparison circuit includes: the negative input end being connected with the output end of the battery, defeated with the boosting unit
The output end of the controlled end of positive input terminal, connection second controlled switch that outlet is connected.
Wherein, second controlled switching circuit is before the comparison circuit exports switching signal, by the battery
Output end and PMU conducting connection.The voltage that the comparison circuit obtains in real time and comparative cell voltage and boosting unit are exported,
When the voltage that the boosting unit is exported is higher than the cell voltage, the comparison circuit exports high level, the high level
It controls second controlled switching circuit and the conducting of battery and PMU is switched into the output end of the boosting unit and leading for PMU
It is logical.So realize switching of the input voltage of PMU between cell voltage and boosting unit.
In conclusion power-supply management system and method for the invention, by monitoring cell voltage, and when cell voltage is lower than
When predeterminated voltage, boost to cell voltage, it is whole to realize when cell voltage deficiency thinks PMU and circuitry is powered
Electromechanical road still can work normally, and thus extend the cruise duration of electronic equipment, is delayed during boosting using delay circuit
Switch the power supply relationship between battery and boosting unit, it can be ensured that before boosting unit boosts to preset voltage value, PMU and whole
Electromechanical road can still work normally；In addition, the battery that the predeterminated voltage of the positive input terminal of comparing unit is exported by battery in order to prevent
Voltage influence and generate unstable voltage value, in the comparing unit include bleeder circuit, it is to be compared to be effectively reduced two
Voltage value；In addition, using delay circuit and the first controlled switching circuit, can for different booster circuit boost process when
Long setting delay time, as far as possible shortening switching time；In addition, using comparison circuit and the second controlled switching circuit, it can more extensively
The boosting unit using different model, adaptive offer delay duration.So the present invention effectively overcomes in the prior art
Various shortcoming and have high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (11)
1. a kind of power-supply management system, to contain the electronic equipment of battery and Power Management Unit characterized by comprising
Negative input end is connected with battery, positive input terminal accesses the comparing unit of predeterminated voltage, for being based on the negative input end institute
The comparison result of received cell voltage and the predeterminated voltage exports enable signal；
Enable end is connected with the output end of the comparing unit, input terminal connect the battery, output end connects the power supply pipe
The boosting unit for managing unit, for the cell voltage to be increased and exported based on the enable signal；
The delay unit being connected in parallel between the output end of the battery and the output end of boosting unit, in the boosting unit
Voltage will be provided to the Power Management Unit from the battery after preset output voltage by, which boosting to, switches to by the liter
Unit is pressed to provide voltage to the Power Management Unit.
2. power-supply management system according to claim 1, which is characterized in that the comparing unit includes: and the battery
Connected bleeder circuit.
3. power-supply management system according to claim 1, which is characterized in that the delay unit includes:
Delay circuit, comprising: the input terminal and enable end and output end being connected with the output end of the comparing unit are used for
Cut-off signal is exported after the boosting unit boosts to preset output voltage；
First controlled switching circuit, comprising: with the output end of the delay circuit be connected controlled end, connect the defeated of the battery
First end, the second end of the output end of the connection boosting unit of outlet.
4. power-supply management system according to claim 1, which is characterized in that the delay unit includes:
Second controlled switching circuit, comprising: the output of the first end and the boosting unit that are connected with the output end of the battery
The connected second end in end and controlled end；
Comparison circuit, comprising: the negative input end that is connected with the output end of the battery is connected with the output end of the boosting unit
Positive input terminal, connection second controlled switch controlled end output end.
5. power-supply management system according to claim 1, which is characterized in that further include: it is connected to and the battery and electricity
Voltage output unit between source control unit.
6. power-supply management system according to claim 1, which is characterized in that the boosting unit includes:
The filtering circuit being connected between the output end and ground wire of the boosting unit.
7. a kind of electronic equipment characterized by comprising
Battery, Power Management Unit, and such as power-supply management system as claimed in any one of claims 1 to 6.
8. a kind of method for managing power supply, to contain the electronic equipment of battery and Power Management Unit, by appointing in claim 1-6
Power-supply management system described in one executes characterized by comprising
Based on the comparison result for the cell voltage and predeterminated voltage for being obtained from battery, enable signal is exported；
The cell voltage is increased based on the enable signal；
After the cell voltage is given raised process, the cell voltage exported to the Power Management Unit is switched
At the voltage after raising.
9. method for managing power supply according to claim 8, which is characterized in that described based on the cell voltage for being obtained from battery
With the comparison result of predeterminated voltage, the mode for exporting enable signal includes:
Acquired cell voltage is subjected to voltage division processing；
Voltage after partial pressure is compared with predeterminated voltage, and enable signal is exported according to comparison result.
10. method for managing power supply according to claim 8, which is characterized in that described to be risen by the cell voltage
After high process, include: by the mode that the cell voltage exported to the Power Management Unit switches to the voltage after increasing
Cut-off signal is exported when the cell voltage is boosted to preset output voltage；
The conducting relationship between the battery and the Power Management Unit is disconnected based on the cut-off signal, and to the power supply
Voltage after administrative unit output raising.
11. method for managing power supply according to claim 8, which is characterized in that described to be risen by the cell voltage
After high process, include: by the mode that the cell voltage exported to the Power Management Unit switches to the voltage after increasing
Compare the voltage that the cell voltage and boost process are exported, the voltage after raising is higher than the battery electricity
The cell voltage exported to the Power Management Unit is then switched to the voltage after increasing by pressure.
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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 |
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| US8324758B2 (en) * | 2009-03-30 | 2012-12-04 | Encell Technology, Inc. | Parallel power back-up system |
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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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