CN105680438B - A kind of power supply circuit and its system and method - Google Patents
A kind of power supply circuit and its system and method Download PDFInfo
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- CN105680438B CN105680438B CN201610111318.6A CN201610111318A CN105680438B CN 105680438 B CN105680438 B CN 105680438B CN 201610111318 A CN201610111318 A CN 201610111318A CN 105680438 B CN105680438 B CN 105680438B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
Abstract
A kind of power supply circuit and its system and method, the power supply circuit include first voltage sampling unit, logic control and driving unit, energy-storage units, the first inductance, first switch tube and second switch；The first voltage sampling unit samples the input voltage of the power supply circuit；The logic control and driving unit receive first voltage sampled signal, and the working condition of the first switch tube and second switch is controlled according to the first voltage sampled signal.This circuit is when loading demand electric current is larger, energy-storage units energy powering load.
Description
Technical field
The present invention relates to a kind of power supply circuit, in particular to a kind of power supply circuit and its system and method.
Background technique
General power supply system includes adapter, power-supply device and terminal.Power-supply device in the prior art has two-stage power supply
Circuit and two kinds of single-stage power supply circuit.
Wherein, two-stage power supply circuit is as depicted in figs. 1 and 2, and power-supply device 10 includes charhing unit 101, discharge cell 102
With energy-storage units 103.Charhing unit 101 is the first order circuit of power-supply device, and discharge cell 102 is the second level of power-supply device
Circuit.Adapter 11 is charged by charhing unit to energy-storage units 103, and energy-storage units 103 also can be by discharge cell 102 to eventually
13 power supply of end.When power-supply device 10 connects adapter 11 and terminal 13 simultaneously, it is greater than the power supply of adapter in terminal requirements electric current
When electric current, the energy-storage units of power-supply device give terminal supplementary power by discharge cell.But program circuit is complicated, component
It is more, it is at high cost.
As shown in figure 3, the charhing unit and discharge cell of single-stage power supply circuit power-supply device use the same charge and discharge list
Member realizes that the charge/discharge unit includes logic control and driving unit 104, switching tube Q17, Q18 and inductance L13；In power supply
When the energy-storage units 103 of equipment 10 are charged, 104 control switch pipe Q17 of logic control and driving unit, switching tube Q18, electricity
L13 and the work of energy-storage units 103 are felt in reduction voltage circuit (BUCK circuit) state；Energy-storage units 103 discharge when, logic control and
104 control switch pipe Q17 of driving unit, switching tube Q18, inductance L13 and the work of energy-storage units 103 are in booster circuit (BOOST electricity
Road) state.Although structure is simple, and adapter 11 can both power to terminal, can also charge to energy-storage units, when
When terminal requirements electric current is greater than adapter supply current, energy-storage units in power-supply device without to terminal supplementary power,
When terminal device demand current is larger, the current needs of terminal device are unable to get satisfaction.
Summary of the invention
The present invention provides a kind of power supply circuit and its system and method, the terminal requirements electric current for solving the power supply circuit are big
When adapter supply current, the current needs of terminal are unable to get the problem of meeting, and circuit structure is simple, at low cost.
To solve the above problems, the embodiment of the invention provides a kind of power supply circuit, including first voltage sampling unit, patrol
Collect control and driving unit, energy-storage units, the first inductance, first switch tube and second switch；
The first voltage sampling unit and power supply circuit input terminal, for sampling the input voltage of the power supply circuit；
The first switch tube and second switch series connection, the first end of the first switch tube connect the power supply circuit
Output end, the first switch tube connects the first end of first inductance with the common end of second switch, described second
The second end of switching tube is grounded；
The second end of first inductance connects described energy-storage units one end, the other end ground connection of the energy-storage units；Institute
It states logic control and driving unit receives first voltage sampled signal, according to first voltage sampled signal control described first
The working condition of switching tube and second switch.
It optionally, further include second voltage sampling unit；
The second voltage sampling unit is in parallel with the energy-storage units, for detecting the real-time voltage of energy-storage units, and
Second voltage sampled signal is exported to the logic control and driving unit, the logic control and driving unit are according to
Second voltage sampled signal controls the working condition of the first switch tube and second switch.
It optionally, further include third switching tube, the third switching tube is connected on the output end of the power supply circuit and defeated
Enter between end, for controlling the working condition of the power supply circuit.
It optionally, further include the first current sampling unit, first current sampling unit samples the power supply circuit
Electric current is exported, the logic control and driving unit receive the first current sampling signal, and believe according to first current sample
The working condition of number control third switching tube.
It optionally, further include the second current sampling circuit and third current sampling circuit, second current sampling circuit
The input current of the power supply circuit is sampled, the third current sampling circuit samples the supply current of the energy-storage units；Institute
It states logic control and driving unit receives the second current sampling signal and third current sampling signal, and according to second electric current
Sampled signal and third current sampling signal control the working condition of the third switching tube.
A kind of supplementary power system of the power supply circuit, further includes adapter and terminal；
The terminal connects the output end of the power supply circuit, and the adapter accesses the power supply circuit input terminal, uses
It powers in the terminal or the power supply circuit.
A kind of supplementary power method, comprising steps of
Judge power supply circuit whether access terminal；If access, comparison terminal demand current and adapter supply current
Size；
If the terminal requirements electric current is greater than the adapter supply current, energy-storage units and the adapter are given simultaneously
The terminal is powered.
Optionally, when the power supply circuit does not access the terminal or the terminal requirements electric current is less than the adapter
When supply current, the adapter charges to the energy-storage units.
Optionally, when the storing electricity of the energy-storage units is greater than supplementary power power threshold, allow the storage unit
It powers to the terminal；Otherwise the storage unit does not allow to be powered to the terminal.
Optionally, when the terminal requirements electric current is greater than the storage electricity of the adapter supply current and the energy-storage units
Amount be less than supplementary power power threshold when, only by the adapter to the terminal power, while power supply circuit inspection reset and
It is no；If resetted, the power supply circuit is reworked；Otherwise, the adapter continues to power to the terminal.
Optionally, when the terminal requirements electric current is greater than the adapter supply current, when the low flag bit of electricity is low,
It is height by the low mark position of electricity when the energy-storage units are discharged into lower than supplementary power power threshold；When the low flag bit of electricity
It is low by the low mark position of electricity after the energy-storage units need to be charged to higher than supplementary power power threshold is restored when being high.Electricity
Measure low flag bit be it is low when, the energy-storage units allow give the terminal power supply；When the low flag bit of electricity is high, the energy storage list
Member is not powered to the terminal.
Optionally, when the energy-storage units and the adapter are powered simultaneously, judge the power supply electricity of the energy-storage units
Whether the sum of output electric current of stream and adapter is greater than cut-off current；
When the state that the sum of the supply current of the energy-storage units and the output electric current of adapter are greater than the cut-off current is held
Continuous more than after certain time period, the energy-storage units and adapter stop powering to the terminal, until the power supply circuit is multiple
Position；After the power supply circuit resets, the power supply circuit is reworked.
Optionally, the terminal requirements electric current and the adapter are judged by detecting the output voltage of the adapter
The size of supply current；
When the output voltage of the adapter is lower than the first reference voltage, the terminal requirements electric current is greater than the adaptation
Device supply current；Otherwise, the terminal requirements electric current is less than the adapter supply current.
Compared with prior art, the technical program has the advantage that
The first voltage sampling unit of the power supply circuit samples the output voltage of the adapter, when the adapter
When output voltage is lower than the first reference voltage, show that the terminal requirements electric current is greater than the adapter supply current, at this point, such as
When the energy-storage units voltage that fruit second voltage sampling unit samples is greater than a certain value, show that storing electricity is greater than supplementary power electricity
Threshold value is measured, energy-storage units and adaptation are powered to terminal simultaneously, and the terminal requirements electric current for solving the power supply circuit is greater than adaptation
When device supply current, the current needs of terminal are unable to get the problem of meeting.
The present invention also provides a kind of current protection methods, comprising steps of judging whether terminal accesses；If the terminal connects
Enter, then the size of comparison terminal demand current and adapter supply current；Otherwise, the adapter is filled to the energy-storage units
Electricity；If the terminal requirements electric current is greater than the adapter supply current, the storing electricity of the energy-storage units is judged；It is no
Then, the adapter is powered to the terminal, while being charged to the energy-storage units；If the storing electricity is greater than supplementary power
Power threshold, then the energy-storage units and the adapter give the terminal to be powered simultaneously, solve the power supply circuit
Terminal requirements electric current be greater than adapter supply current when, the current needs of terminal are unable to get the problem of meeting.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of prior art two-stage power supply circuit；
Fig. 2 is the schematic illustration of prior art two-stage power supply circuit；
Fig. 3 is the schematic illustration of prior art single-stage power supply circuit；
Fig. 4 is the structural schematic diagram of first embodiment of the invention power supply circuit；
Fig. 5 is the structural schematic diagram of second embodiment of the invention power supply circuit；
Fig. 6 is the structural schematic diagram of third embodiment of the invention power supply circuit；
Fig. 7 is the structural schematic diagram of fourth embodiment of the invention power supply circuit；
Fig. 8 is the flow diagram of first embodiment of the invention supplementary power method；
Fig. 9 is the flow diagram of second embodiment of the invention supplementary power method；
Figure 10 is the flow diagram of third embodiment of the invention supplementary power method；
Figure 11 is the flow diagram of fourth embodiment of the invention supplementary power method.
Specific embodiment
With reference to Fig. 1 and Fig. 2, when the power-supply device 10 of traditional power supply system is made of two-stage circuit, although being needed in terminal
When electric current being asked to be greater than the supply current of adapter, the energy-storage units of power-supply device give terminal supplementary power by discharge cell.But
It is that program circuit is complicated, component is more.In particular, the circuit needs two inductance, lead to high expensive, and the charging
Unit is connected with discharge cell using cascade mode, causes circuit efficiency relatively low.
With reference to Fig. 3, when the power-supply device 10 of traditional power supply system is made of single-level circuit, charhing unit and discharge cell
It being integrated in the same charge/discharge unit, although this circuit structure simplifies, and adapter 11 can power to terminal 13,
But it cannot achieve adapter 11 and energy-storage units 103 while powering to terminal 13.
Based on this, the present invention provides a kind of power supply circuit, adapter and storage when terminal requirements electric current is larger are realized
The function that energy unit is powered to terminal simultaneously, and it is at low cost, it is high-efficient.
With reference to the accompanying drawing, by specific embodiment, clear, complete description is carried out to technical solution of the present invention.
Please refer to Fig. 4: one embodiment of power supply circuit provided by the invention；
In the present embodiment, power supply circuit 12 includes first voltage sampling unit 121, logic control and driving unit 122,
Energy-storage units 123, the first inductance L1, first switch tube K1 and second switch K2；The first voltage sampling unit 121 is in parallel
First voltage sampled signal is obtained for sampling the input voltage Uin of the power supply circuit 12 in the input terminal of power supply circuit 12
Ua；The first switch tube K1 and second switch K2 series connection, the first end of the first switch tube K1 connect the power supply electricity
The output end on road 12, the first switch tube K1 connect the first of the first inductance L1 with the common end of second switch K2
End, the second end ground connection of the second switch K2；The second end of the first inductance L1 connects the energy-storage units 123 1
End, the other end ground connection of the energy-storage units 123；The logic control and driving unit 122 receive first voltage sampled signal
Ua controls the working condition of the first switch tube K1 and second switch K2 according to the first voltage sampled signal Ua.
12 input terminal of power supply circuit connects power supply, and output end connects terminal.The power supply can give power supply electricity
Energy-storage units 123 in road 12 charge, and can also power to terminal, when loading demand electric current is larger, power supply and energy storage list
Member 123 can power simultaneously for terminal.
Wherein, power supply has characteristics that the power supply when terminal requirements electric current is greater than the supply current of power supply
The output voltage of power supply can be pulled low；I.e. by judging that the output voltage of power supply may determine that terminal requirements electric current and power supply
Size between the supply current of power supply, such as constant pressure power supply or invariable power power supply.
First reference voltage Uref1 built in the logic control and driving unit 122, by the first reference voltage Uref1 with
First voltage sampled signal Ua is compared.As Ua >=Uref1, show that terminal requirements electric current is less than or equal to power supply
Supply current；As Ua < Uref1, show that terminal requirements electric current is greater than the supply current of power supply, energy-storage units 123 are to end
Hold supplementary power.
Specific work process is as follows:
Logic control and driving unit 122 judge the size of the first reference voltage Uref1 and first voltage sampled signal Ua；
When first voltage sampled signal Ua is less than the first reference voltage Uref1, show that terminal requirements electric current is greater than power supply
The supply current of power supply.At this point, logic control and driving unit 122 control first switch tube K1, second switch K2, the first electricity
Feel L1 and the work of energy-storage units 123 at boost mode (boost circuit-mode), energy-storage units 123 are to terminal supplementary power.
When first voltage sampled signal Ua is greater than the first reference voltage Uref1, show that terminal requirements electric current is less than power supply
The supply current of power supply, power supply provides electric current to terminal, and charges to energy-storage units 123.When charging, logic control
And driving unit 122 controls first switch tube K1, second switch K2, the first inductance L1 and the work of energy-storage units 123 and is being depressured
Mode (buck circuit-mode).
In addition when 12 input terminal of power supply circuit accesses power supply, and when the non-access terminal of output end, logic control and drive
Moving cell 122 also controls first switch tube K1, second switch K2, the first inductance L1 and the work of energy-storage units 123 in decompression mould
Formula (buck circuit-mode), power supply charges to energy-storage units 123.
In order to increase the service life of energy-storage units, and the efficiency of raising supplementary power, the present invention provides second implementations
Example, please refers to Fig. 5；
In the present embodiment, power supply circuit 12 further includes second voltage sampling unit 124, the second voltage sampling unit
124 is in parallel with the energy-storage units 123, for sampling the real-time voltage of energy-storage units 123, obtains second voltage sampled signal
Uc；
Logic control and the also built-in second reference signal Uref2 of driving unit 122, it and second voltage sampled signal Uc make
Compare；Wherein, the second reference voltage Uref2 corresponds to the supplementary power power threshold QA of energy-storage units 123, when energy-storage units 123
Storing electricity when reaching supplementary power power threshold QA, energy-storage units 123 are to terminal supplementary power；
Specific work process is as follows:
Logic control and driving unit 122 judge the size of the first reference voltage and first voltage sampled signal；
When first voltage sampled signal Ua is less than the first reference voltage Uref1, show that terminal requirements electric current is greater than power supply
The supply current of power supply.At this point, if second voltage sampled signal Uc is greater than the second reference signal Uref2, that is, energy-storage units
When 123 storing electricity Qc is higher than supplementary power power threshold QA, logic control and driving unit 122 control first switch tube
K1, second switch K2, the first inductance L1 and the work of energy-storage units 123 are in boost mode (boost circuit-mode), energy-storage units
123 to terminal supplementary power；, whereas if second voltage sampled signal Uc is less than the second reference signal Uref2, that is, energy storage list
When the storing electricity Qc of member 123 is lower than supplementary power power threshold QA, logic control and driving unit 122 control first switch tube
K1 and second switch K2 is disconnected, and power supply is only powered to terminal, is not charged to energy-storage units 123.
When first voltage sampled signal Ua is greater than the first reference voltage Uref1, show that terminal requirements electric current is less than power supply
The supply current of power supply, power supply provides electric current to terminal, and charges to energy-storage units 123.When charging, logic control
And driving unit 122 controls first switch tube K1, second switch K2, the first inductance L1 and the work of energy-storage units 123 and is being depressured
Mode (buck circuit-mode).
In addition when 12 input terminal of power supply circuit accesses power supply, and when the non-access terminal of output end, logic control and drive
Moving cell 122 also controls first switch tube K1, second switch K2, the first inductance L1 and the work of energy-storage units 123 in decompression mould
Formula (buck circuit-mode), power supply charges to energy-storage units 123.
Referring to Fig. 6, another embodiment of the invention；
In the present embodiment, power supply circuit 12 further includes the third switching tube being connected between its input terminal and output end
K3, the third switching tube K3 are used to control the working condition of power supply circuit 12, when third switching tube K3 closure, power supply circuit
12 work normally, specifically:
When power supply circuit 12 accesses power supply and terminal, power supply circuit 12 judges terminal requirements electric current and power supply
The size of supply current further judge 123 electricity of energy-storage units if the former is greater than the latter, when energy-storage units 123 are electric
Amount is greater than supplementary power power threshold, then energy-storage units 123 and power supply are powered to terminal simultaneously；If energy-storage units 123
Storing electricity be less than supplementary power power threshold, then power supply is only powered to terminal, at this time because of terminal requirements electric current
The supply current of power supply itself is had been above, so energy-storage units will not be given even if 123 electricity of energy-storage units is very low
123 chargings.When the non-access terminal of power supply circuit 12 or terminal requirements electric current are less than supply current, power supply is electric to power supply
Energy-storage units 123 in road 12 charge.
It should be noted that K3 can be connected between K1 and the input terminal of power supply circuit 12, can also be connected on K1 and
Between the output end of power supply circuit 12.
In order to protect power supply circuit and terminal, overcurrent damage is prevented, the first current sampling unit is also set up in the present embodiment
125, the first current sampling unit 125 samples the output electric current Iout of power supply circuit 12, this electric current is power supply to terminal
The sum of the supply current that the supply current and energy-storage units 123 of offer are provided to terminal；First current sampling unit 125 samples
To the first current sampling signal be input to logic control and driving unit 122, third built in logic control and driving unit 122
Reference signal Iref, logic control and driving unit 122 to first current sampling signal and third reference signal Iref into
Row compares, and when the former is greater than the latter, shows over-current phenomenon avoidance occurred, after the over-current phenomenon avoidance continues for some time △ t, patrols
It collects control and driving unit 122 controls third switching tube K3 and disconnects, power supply stopping provides the terminal with electric current；Logic control simultaneously
System and driving unit 122 also can control first switch tube K1 and second switch K2 and disconnect, at this point, energy-storage units 123 also stop
Only provide the terminal with electric current.
Overcurrent in order to prevent needs to obtain power supply and provides to export electric current and energy-storage units that terminal provides to terminal
The sum of supply current, the supply current of the output electric current and energy-storage units of power supply can also be sampled respectively；Referring specifically to
Fig. 7；
In the present embodiment, first switch tube, second switch and third switching tube are all made of metal-oxide-semiconductor, respectively Q1, Q2 and
Q3, power supply are adapter 11；Wherein adapter 11 is constant voltage output adapter.
It (is also mentioned for power supply to terminal 13 using the input current of the second current sampling unit 126 sampling power supply circuit
The output electric current of confession) the second current sampling signal Ia is obtained, the power supply of energy-storage units is sampled using third current sampling unit 127
Electric current obtains third current sampling signal Ic.Second current sampling signal and the input logic control simultaneously of third current sampling signal
And driving unit, logic control and driving unit sum to the second current sampling signal and third current sampling signal, and will knot
Fruit and third reference signal Iref comparison: when the former is greater than the latter, show over-current phenomenon avoidance occurred, when the over-current phenomenon avoidance is held
After continuous a period of time △ t, logic control and driving unit control Q3 are disconnected, and power supply stops providing electric current to terminal 13；Together
When logic control and driving unit also can control Q1 and Q2 and disconnect, at this point, energy-storage units also stop providing electric current to terminal 13.
When adapter 11 charges to energy-storage units, logic control element controls Q1, Q2, Q3, L1 and energy-storage units work exists
Decompression mode (buck operating mode), the duty ratio of control switch pipe Q1 can control adapter 11 and fill to what energy-storage units charged
Electric current.
When energy-storage units are powered to terminal 13, logic control element control Q1, Q2, Q3, L1 and energy-storage units work are being risen
Die pressing type (boost operating mode), the duty ratio of control switch pipe Q1, Q2 are the power supply electricity that can control energy-storage units to terminal
Stream.
The present invention also provides a kind of supplementary power system, the supplementary power system includes power supply circuit.Referring to Fig. 7,
The power supply system further includes adapter and terminal, and terminal 13 is connected to power supply circuit output end；The connection power supply electricity of adapter 11
The input terminal on road can be powered to terminal 13 and energy-storage units 123.
The present invention also provides a kind of supplementary power methods；
The flow diagram of the first embodiment of the supplementary power method referring to Fig. 8, the present embodiment the following steps are included:
Step S001: judge whether power supply circuit has terminal access；
Step S002: if power supply circuit accessed terminal, comparison terminal demand current is big with adapter supply current
It is small；
Step S003: if the terminal requirements electric current is greater than the adapter supply current, the energy-storage units are to institute
Terminal supplementary power is stated, i.e., the described energy-storage units and the adapter give the terminal to be powered simultaneously.
Supplementary power is arranged referring to Fig. 9, the present embodiment in the flow diagram of the second embodiment of the supplementary power method
Voltage threshold QA, and the storing electricity of energy-storage units is judged, only when storing electricity is greater than supplementary power power threshold
When QA, the energy-storage units could be to terminal supplementary power, and specific work process is as follows:
Step S101, judges whether terminal accesses power supply circuit.
If not accessing, step S102, the adapter only gives the energy-storage units to charge.
If access, step S103, the then size of comparison terminal demand current and adapter supply current；
If the terminal requirements electric current is less than the supply current of the adapter, step S104, the adapter is to eventually
While the power supply of end, charge to the energy-storage units.
If the terminal requirements electric current is greater than the adapter supply current, step S105 then judges depositing for energy-storage units
Reserve of electricity.
If the storing electricity is less than supplementary power power threshold, step S106 only gives the terminal by the adapter
Power supply；
If the storing electricity is greater than supplementary power power threshold, step S107, the then energy-storage units and the adaptation
Device gives the terminal to be powered simultaneously.
The flow diagram of the third embodiment of supplementary power method provided by the invention is referring to Figure 10；
In the present embodiment, when the terminal requirements electric current is greater than depositing for the adapter supply current and the energy-storage units
When reserve of electricity is less than supplementary power power threshold, only powered by adapter to terminal；If power supply circuit does not reset, always
It is only powered by adapter to terminal, and adapter cannot charge to energy-storage units, only after power supply circuit checks reset,
It can just detect again, return to step S201；It is supplied when terminal does not access power supply circuit or terminal requirements electric current less than adapter
Electric current, then adapter charges to energy-storage units simultaneously.If not resetting, even if terminal does not access power supply circuit or terminal and needs
Electric current is asked to be less than adapter supply current, adapter also no longer charges to energy-storage units.
The flow diagram of 4th embodiment of supplementary power method provided by the invention is referring to Figure 11；
In the present embodiment, the energy-storage units in power supply circuit are recharged not needing to reset and just be can be carried out, specific implementation side
Formula is as follows:
The present embodiment also sets up the low flag bit of storing electricity of energy-storage units, and there are two shapes for the low flag bit of the storing electricity
State, it is respectively low and high, 0 and 1 are corresponded in the present embodiment；When the low flag bit of the storing electricity is 0, show energy storage list
Member has electricity, can give terminal supplementary power at the appropriate time, that is, when terminal requirements electric current is greater than adapter supply current,
Energy-storage units can give terminal supplementary power.
When the low flag bit of the storing electricity is 1, show that energy-storage units do not have storing electricity or the electricity of storage very
Low, at this point, energy-storage units will not give terminal supplementary power, and adapter can also be filled at the appropriate time to energy-storage units
Electricity, that is, when terminal requirements electric current is less than adapter supply current or non-access terminal, adapter is filled to energy-storage units
Electricity.
In order to accurately carry out set to the low mark of storing electricity, the present embodiment, which is also set up, restores supplementary power power threshold
QB, wherein restoring supplementary power voltage threshold QB is greater than supplementary power power threshold QA.
When energy-storage units have electricity, i.e. the low flag bit of storing electricity is 0, if the storing electricity electric discharge of energy-storage units at this time
Drop to supplementary power power threshold QA hereinafter, the low flag bit of storing electricity is set to 1.The case where energy-storage units discharge is wrapped
Include two kinds: 1, when non-couple in adapter and the low flag bit of storing electricity are 0, energy-storage units are powered terminal；2, it accesses
Adapter, but terminal requirements electric current is greater than adapter supply current and storing electricity low flag bit when being 0, energy-storage units pair
It carries out supplementary power.
When energy-storage units do not have electricity or electricity is very low, i.e., the low flag bit of storing electricity is 1, if energy-storage units at this time
Storing electricity reach restore supplementary power voltage threshold QB during the charging process, the low marker of storing electricity is set to 0.
Supplementary power method provided by the invention, further includes overcurrent protection function, is come especially by one cut-off current of setting
It realizes, the maximum current that the cut-off current corresponding circuits can be born with load.When the supply current and adaptation of the energy-storage units
After the state that the sum of output electric current of device is greater than cut-off current is continued above certain time period, the energy-storage units and adapter stop
It powers to the terminal, until the power supply circuit resets；After the power supply circuit resets, the power supply circuit is reworked.
It should be noted that the protection scope of method of supplying power to provided by the present application is not limited to given power supply circuit,
Realize the situation of this method of supplying power to also within the scope of protection of this application using other circuits or other way.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, anything that does not depart from the technical scheme of the invention, and according to the present invention
Technical spirit any simple modifications, equivalents, and modifications to the above embodiments, belong to technical solution of the present invention
Protection scope.
Claims (10)
1. a kind of power supply circuit, which is characterized in that including first voltage sampling unit, logic control and driving unit, energy storage list
Member, the first inductance, first switch tube and second switch；
The first voltage sampling unit is connected in parallel on power supply circuit input terminal, for sampling the input voltage of the power supply circuit；
The first switch tube and second switch series connection, the first end of the first switch tube connect the defeated of the power supply circuit
Outlet, the first switch tube and the common end of second switch connect the first end of first inductance, the second switch
The second end of pipe is grounded；
The second end of first inductance connects described energy-storage units one end, the other end ground connection of the energy-storage units；It is described to patrol
It collects control and driving unit receives first voltage sampled signal, the first switch is controlled according to the first voltage sampled signal
The working condition of pipe and second switch；
Power supply circuit input terminal connects adapter, and output end connects terminal, if terminal requirements electric current is greater than the power supply electricity of adapter
Stream, then energy-storage units and adapter are powered to terminal simultaneously, the first switch tube, the second switch, described the
One inductance and energy-storage units work are in boost mode；If terminal requirements electric current is less than the supply current of adapter, adapter
It gives terminal to provide electric current, and charges to the energy-storage units, the first switch tube, the second switch, described the
One inductance and energy-storage units work are in decompression mode；
It further include third switching tube, the third switching tube is connected between the output end and input terminal of the power supply circuit, is used
In the working condition for controlling the power supply circuit；
It further include the second current sampling circuit and third current sampling circuit, second current sampling circuit samples the power supply
The input current of circuit, the third current sampling circuit sample the supply current of the energy-storage units；The logic control and
Driving unit receives the second current sampling signal and third current sampling signal, and according to second current sampling signal and the
Three current sampling signals control the working condition of the third switching tube.
2. power supply circuit as described in claim 1, which is characterized in that further include second voltage sampling unit；
The second voltage sampling unit is in parallel with the energy-storage units, for detecting the real-time voltage of energy-storage units, and by
Two voltage sampling signals are exported to the logic control and driving unit, and the logic control and driving unit are according to described second
Voltage sampling signal controls the working condition of the first switch tube and second switch.
3. a kind of supplementary power system with power supply circuit as described in claim 1, which is characterized in that further include adapter
And terminal；
The terminal connects the output end of the power supply circuit, and the adapter accesses the power supply circuit input terminal, for giving
The terminal or power supply circuit power supply.
4. a kind of supplementary power method, which is characterized in that power supply circuit input terminal connects adapter, and output end connects terminal, institute
Stating power supply circuit includes first voltage sampling unit, logic control and driving unit, energy-storage units, the first inductance, first switch
Pipe and second switch；
The first voltage sampling unit is connected in parallel on power supply circuit input terminal, for sampling the input voltage of the power supply circuit；
The first switch tube and second switch series connection, the first end of the first switch tube connect the defeated of the power supply circuit
Outlet, the first switch tube and the common end of second switch connect the first end of first inductance, the second switch
The second end of pipe is grounded；
The second end of first inductance connects described energy-storage units one end, the other end ground connection of the energy-storage units；It is described to patrol
It collects control and driving unit receives first voltage sampled signal, the first switch is controlled according to the first voltage sampled signal
The working condition of pipe and second switch；
Judge power supply circuit whether access terminal；If access, the size of comparison terminal demand current and adapter supply current；
If the terminal requirements electric current is greater than the adapter supply current, energy-storage units and the adapter are given described simultaneously
Terminal is powered；
If terminal requirements electric current is greater than the supply current of adapter, energy-storage units and adapter are powered to terminal simultaneously,
The first switch tube, the second switch, first inductance and energy-storage units work are in boost mode；If terminal
Demand current is less than the supply current of adapter, and adapter gives terminal to provide electric current, and charges to energy-storage units, and described the
One switching tube, the second switch, first inductance and energy-storage units work are in decompression mode；
It further include third switching tube, the third switching tube is connected between the output end and input terminal of the power supply circuit, is used
In the working condition for controlling the power supply circuit；
It further include the second current sampling circuit and third current sampling circuit, second current sampling circuit samples the power supply
The input current of circuit, the third current sampling circuit sample the supply current of the energy-storage units；The logic control and
Driving unit receives the second current sampling signal and third current sampling signal, and according to second current sampling signal and the
Three current sampling signals control the working condition of the third switching tube.
5. supplementary power method as claimed in claim 4, which is characterized in that when the power supply circuit do not access the terminal or
When terminal requirements electric current described in person is less than the adapter supply current, the adapter charges to the energy-storage units.
6. supplementary power method as described in claim 4 or 5, which is characterized in that the storing electricity of the energy-storage units is greater than
When supplementary power power threshold, the storage unit is allowed to power to the terminal；Otherwise the storage unit does not allow to institute
Terminal is stated to be powered.
7. supplementary power method as claimed in claim 6, which is characterized in that when the terminal requirements electric current is greater than the adaptation
When the storing electricity of device supply current and the energy-storage units is less than supplementary power power threshold, only by the adapter to described
Terminal power supply, while whether power supply circuit inspection reset；If resetted, the power supply circuit is reworked；Otherwise, described suitable
Orchestration continues to power to the terminal.
8. supplementary power method as claimed in claim 6, which is characterized in that the terminal requirements electric current is greater than the adapter
It,, will be electric when the energy-storage units are discharged into lower than supplementary power power threshold when the low flag bit of electricity is low when supply current
Low mark position is measured as height；When the low flag bit of electricity is high, the energy-storage units, which need to be charged to be higher than, restores supplementary power electricity
It is low by the low mark position of electricity after measuring threshold value；When the low flag bit of electricity is low, the energy-storage units allow to supply to the terminal
Electricity；When the low flag bit of electricity is high, the energy-storage units do not give the terminal to power.
9. such as claim 4,5 described in any item supplementary power methods, which is characterized in that when energy-storage units and described suitable
When orchestration is powered simultaneously, judge whether the sum of the supply current of the energy-storage units and the output electric current of adapter are greater than current limliting
Value；
When the state that the sum of the supply current of the energy-storage units and the output electric current of adapter are greater than the cut-off current persistently surpasses
After crossing certain time period, the energy-storage units and adapter stop powering to the terminal, until the power supply circuit resets；Institute
After stating power supply circuit reset, the power supply circuit is reworked.
10. such as claim 4,5 described in any item supplementary power methods, which is characterized in that by detecting the adapter
Output voltage judges the size of the terminal requirements electric current and the adapter supply current；
When the output voltage of the adapter is lower than the first reference voltage, the terminal requirements electric current is supplied greater than the adapter
Electric current；Otherwise, the terminal requirements electric current is less than the adapter supply current.
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| CN111313700A (en) * | 2019-04-01 | 2020-06-19 | 成都芯源系统有限公司 | Power supply circuit and power supply method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8120323B2 (en) * | 2008-01-28 | 2012-02-21 | Delta Electronics, Inc. | High efficiency charging circuit and power supply system having such high efficiency charging circuit |
| CN103023127A (en) * | 2012-12-28 | 2013-04-03 | 劲达技术(河源)有限公司 | Solar air conditioner and power supply method thereof |
| CN104410114A (en) * | 2014-11-03 | 2015-03-11 | 辅容 | Mobile power source |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8120323B2 (en) * | 2008-01-28 | 2012-02-21 | Delta Electronics, Inc. | High efficiency charging circuit and power supply system having such high efficiency charging circuit |
| CN103023127A (en) * | 2012-12-28 | 2013-04-03 | 劲达技术(河源)有限公司 | Solar air conditioner and power supply method thereof |
| CN104410114A (en) * | 2014-11-03 | 2015-03-11 | 辅容 | Mobile power source |
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