CN105680438A - Power supply circuit and system and method thereof - Google Patents
Power supply circuit and system and method thereof Download PDFInfo
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- CN105680438A CN105680438A CN201610111318.6A CN201610111318A CN105680438A CN 105680438 A CN105680438 A CN 105680438A CN 201610111318 A CN201610111318 A CN 201610111318A CN 105680438 A CN105680438 A CN 105680438A
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- power supply
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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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a power supply circuit and a system and method thereof. The power supply circuit comprises a first voltage sampling unit, a logic control and driving unit, an energy storage unit, a first inductor, a first switching tube and a second switching tube, wherein the first voltage sampling unit is used for sampling an input voltage of the power supply circuit, and the logic control and driving unit is used for receiving a first voltage sampling signal and controlling the working conditions of the first switching tube and the second switching tube according to the first voltage sampling signal. In the circuit, the energy storage unit can supply power to a load when relatively large current is required by the load.
Description
Technical field
The present invention relates to a kind of power supply circuits, particularly to a kind of power supply circuits and system and method thereof.
Background technology
General electric power system includes adapter, power-supply device and terminal. Power-supply device of the prior art has two-stage power supply circuits and single-stage power supply circuits two kinds.
Wherein, as depicted in figs. 1 and 2, power-supply device 10 includes charhing unit 101, discharge cell 102 and energy-storage units 103 to two-stage power supply circuits. Charhing unit 101 is the first order circuit of power-supply device, and discharge cell 102 is the second level circuit of power-supply device. Adapter 11 is charged to energy-storage units 103 by charhing unit, and energy-storage units 103 also can pass through discharge cell 102 and power to terminal 13. When power-supply device 10 is simultaneously connected with adapter 11 and terminal 13, when terminal requirements electric current is more than the supply current of adapter, the energy-storage units of power-supply device passes through discharge cell to terminal supplementary power. But program circuit is complicated, and components and parts are many, cost is high.
As it is shown on figure 3, the charhing unit of single-stage power supply circuits power-supply device and discharge cell adopt same charge/discharge unit to realize, described charge/discharge unit includes logic control and driver element 104, switching tube Q17, Q18 and inductance L13; When the energy-storage units 103 of power-supply device 10 is charged, logic control and driver element 104 control switching tube Q17, switching tube Q18, inductance L13 and energy-storage units 103 and are operated in reduction voltage circuit (BUCK circuit) state; When energy-storage units 103 discharges, logic control and driver element 104 control switching tube Q17, switching tube Q18, inductance L13 and energy-storage units 103 and are operated in booster circuit (BOOST circuit) state. Although simple in construction, and adapter 11 both can power to terminal, can also charge to energy-storage units, but, when terminal requirements electric current is more than adapter supply current, energy-storage units in power-supply device is without to terminal supplementary power, and when terminal unit demand current is bigger, the current needs of terminal unit cannot be met.
Summary of the invention
The present invention provides a kind of power supply circuits and system and method thereof, when solving the terminal requirements electric current of described power supply circuits more than adapter supply current, and the problem that the current needs of terminal cannot be met, and circuit structure is simple, and cost is low.
For solving the problems referred to above, embodiments provide a kind of power supply circuits, including the first voltage sampling unit, logic control and driver element, energy-storage units, the first inductance, the first switching tube and second switch pipe;
Described first voltage sampling unit and power supply circuits input, for the input voltage of described power supply circuits of sampling;
Described first switching tube and the series connection of second switch pipe, first end of described first switching tube connects the outfan of described power supply circuits, the common port of described first switching tube and second switch pipe connects the first end of described first inductance, the second end ground connection of described second switch pipe;
Second end of described first inductance connects described energy-storage units one end, the other end ground connection of described energy-storage units; Described logic control and driver element receive the first voltage sampling signal, control the duty of described first switching tube and second switch pipe according to described first voltage sampling signal.
Optionally, the second voltage sampling unit is also included;
Described second voltage sampling unit is in parallel with described energy-storage units, for detecting the real-time voltage of energy-storage units, and the second voltage sampling signal is exported the duty controlling described first switching tube and second switch pipe to described logic control and driver element, described logic control and driver element according to described second voltage sampling signal.
Optionally, also including the 3rd switching tube, described 3rd switching tube is connected between outfan and the input of described power supply circuits, for controlling the duty of described power supply circuits.
Optionally, also include the first current sampling unit, the output electric current of the described first current sampling unit described power supply circuits of sampling, described logic control and driver element receive the first current sampling signal, and control the duty of described 3rd switching tube according to described first current sampling signal.
Optionally, the second current sampling circuit and the 3rd current sampling circuit, the input current of the described second current sampling circuit described power supply circuits of sampling, the supply current of the described 3rd current sampling circuit described energy-storage units of sampling are also included; Described logic control and driver element receive the second current sampling signal and the 3rd current sampling signal, and control the duty of described 3rd switching tube according to described second current sampling signal and the 3rd current sampling signal.
The supplementary power system of a kind of described power supply circuits, also includes adapter and terminal;
Described terminal connects the outfan of described power supply circuits, and described adapter accesses described power supply circuits input, for powering to described terminal or described power supply circuits.
A kind of supplementary power method, including step:
Judge whether power supply circuits access terminal; If accessing, then the size of comparison terminal demand current and adapter supply current;
If described terminal requirements electric current is more than described adapter supply current, then energy-storage units and described adapter are powered to described terminal simultaneously.
Optionally, when described power supply circuits do not access described terminal or described terminal requirements electric current less than described adapter supply current, the charging of described energy-storage units given by described adapter.
Optionally, when the storing electricity of described energy-storage units is more than supplementary power power threshold, it is allowed to described memory element powers to described terminal; Otherwise described memory element does not allow to be powered to described terminal.
Optionally, when described terminal requirements electric current more than the storing electricity of described adapter supply current and described energy-storage units less than supplementary power power threshold time, only powered to described terminal by described adapter, whether power supply circuits inspection simultaneously resets; If resetted, then described power supply circuits are reworked; Otherwise, described adapter continues to power to described terminal.
Optionally, when described terminal requirements electric current is more than described adapter supply current, when the low flag bit of electricity is low, when described energy-storage units discharges into lower than supplementary power power threshold, it is high by low for electricity mark position; When the low flag bit of electricity is high, described energy-storage units need to be charged to higher than after recovering supplementary power power threshold, is low by low for electricity mark position. When the low flag bit of electricity is low, described energy-storage units allows to power to described terminal; When the low flag bit of electricity is high, described energy-storage units powers to described terminal.
Optionally, when described energy-storage units and described adapter are powered simultaneously, it is judged that whether the supply current of described energy-storage units and the output electric current sum of adapter be more than cut-off current;
After the supply current of described energy-storage units and the output electric current sum of adapter are continued above certain time period more than the state of described cut-off current, described energy-storage units and adapter stop powering to described terminal, until described power supply circuits reset; After described power supply circuits reset, described power supply circuits are reworked.
Optionally, described terminal requirements electric current and the size of described adapter supply current are judged by detecting the output voltage of described adapter;
When the output voltage of described adapter is lower than the first reference voltage, described terminal requirements electric current is more than described adapter supply current; Otherwise, described terminal requirements electric current is less than described adapter supply current.
Compared with prior art, the technical program has the advantage that
The output voltage of the first voltage sampling unit described adapter of sampling of described power supply circuits, when the output voltage of described adapter is lower than the first reference voltage, show that described terminal requirements electric current is more than described adapter supply current, now, if the energy-storage units voltage that the second voltage sampling unit samples is more than a certain value, show that storing electricity is more than supplementary power power threshold, energy-storage units and adaptation are powered to terminal simultaneously, when solving the terminal requirements electric current of described power supply circuits more than adapter supply current, the problem that the current needs of terminal cannot be met.
The present invention also provides for a kind of current protection method, including step: judge whether terminal accesses; If described terminal accesses, then the size of comparison terminal demand current and adapter supply current; Otherwise, the charging of described energy-storage units given by described adapter; If described terminal requirements electric current is more than described adapter supply current, then judge the storing electricity of described energy-storage units; Otherwise, described adapter powers to described terminal, gives the charging of described energy-storage units simultaneously; If described storing electricity is more than supplementary power power threshold, then described energy-storage units and described adapter are powered to described terminal simultaneously, when solving the terminal requirements electric current of described power supply circuits more than adapter supply current, the problem that the current needs of terminal cannot be met.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art two-stage power supply circuits;
Fig. 2 is the principle schematic of prior art two-stage power supply circuits;
Fig. 3 is the principle schematic of prior art single-stage power supply circuits;
Fig. 4 is the structural representation of first embodiment of the invention power supply circuits;
Fig. 5 is the structural representation of second embodiment of the invention power supply circuits;
Fig. 6 is the structural representation of third embodiment of the invention power supply circuits;
Fig. 7 is the structural representation of fourth embodiment of the invention power supply circuits;
Fig. 8 is the schematic flow sheet of first embodiment of the invention supplementary power method;
Fig. 9 is the schematic flow sheet of second embodiment of the invention supplementary power method;
Figure 10 is the schematic flow sheet of third embodiment of the invention supplementary power method;
Figure 11 is the schematic flow sheet of fourth embodiment of the invention supplementary power method.
Detailed description of the invention
With reference to Fig. 1 and Fig. 2, when the power-supply device 10 of traditional electric power system is made up of two-stage circuit, although when terminal requirements electric current is more than the supply current of adapter, the energy-storage units of power-supply device passes through discharge cell to terminal supplementary power. But program circuit is complicated, and components and parts are many. Particularly, this circuit needs two inductance, causes high expensive, and described charhing unit and discharge cell adopt the mode of cascade to connect, and cause that circuit efficiency is on the low side.
With reference to Fig. 3, when the power-supply device 10 of traditional electric power system is made up of single-level circuit, charhing unit and discharge cell are integrated in same charge/discharge unit, although this circuit structure simplifies, and adapter 11 power to terminal 13, but adapter 11 and energy-storage units 103 cannot be realized and power to terminal 13 simultaneously.
Based on this, the invention provides a kind of power supply circuits, it is achieved that when terminal requirements electric current is bigger, the function that adapter and energy-storage units are powered to terminal simultaneously, and cost is low, and efficiency is high.
Below in conjunction with accompanying drawing, by specific embodiment, technical scheme is carried out clear, complete description.
Refer to Fig. 4: first embodiment of power supply circuits provided by the invention;
In the present embodiment, power supply circuits 12 include the first voltage sampling unit 121, logic control and driver element 122, energy-storage units 123, the first inductance L1, the first switching tube K1 and second switch pipe K2; Described first voltage sampling unit 121 is connected in parallel on the input of power supply circuits 12, for the input voltage Uin of described power supply circuits 12 of sampling, obtains the first voltage sampling signal Ua; Described first switching tube K1 and second switch pipe K2 series connection, first end of described first switching tube K1 connects the outfan of described power supply circuits 12, the common port of described first switching tube K1 and second switch pipe K2 connects first end of described first inductance L1, the second end ground connection of described second switch pipe K2; Second end of described first inductance L1 connects described energy-storage units 123 one end, the other end ground connection of described energy-storage units 123; Described logic control and driver element 122 receive the first voltage sampling signal Ua, control the duty of described first switching tube K1 and second switch pipe K2 according to described first voltage sampling signal Ua.
Power supply circuits 12 input connects power supply, and outfan connects terminal. Described power supply charges to the energy-storage units 123 in power supply circuits 12, also can power to terminal, and when loading demand electric current is bigger, power supply and energy-storage units 123 can be powered for terminal simultaneously.
Wherein, power supply has characteristics that the output voltage of power supply can be pulled low when terminal requirements electric current is more than the supply current of power supply; Namely by judging that the output voltage of power supply may determine that the size between terminal requirements electric current and the supply current of power supply, such as constant voltage power supply or invariable power power supply.
Described logic control and the built-in first reference voltage Uref1 of driver element 122, compare the first reference voltage Uref1 and the first voltage sampling signal Ua. As Ua>=Uref1, it was shown that terminal requirements electric current is less than or equal to the supply current of power supply; When Ua is<during Uref1, it was shown that terminal requirements electric current is more than the supply current of power supply, and energy-storage units 123 is to terminal supplementary power.
Specific works process is as follows:
Logic control and driver element 122 judge the first reference voltage Uref1 and the size of the first voltage sampling signal Ua;
When the first voltage sampling signal Ua is less than the first reference voltage Uref1, it was shown that terminal requirements electric current is more than the supply current of power supply. Now, logic control and driver element 122 control the first switching tube K1, second switch pipe K2, the first inductance L1 and energy-storage units 123 and are operated in boost mode (boost circuit-mode), and energy-storage units 123 is to terminal supplementary power.
When the first voltage sampling signal Ua is more than the first reference voltage Uref1, it was shown that terminal requirements electric current is less than the supply current of power supply, and power supply provides electric current to terminal, and energy-storage units 123 is charged.During charging, logic control and driver element 122 control the first switching tube K1, second switch pipe K2, the first inductance L1 and energy-storage units 123 and are operated in decompression mode (buck circuit-mode).
Additionally when power supply circuits 12 input accesses power supply, and outfan is not when accessing terminal, logic control and driver element 122 also control the first switching tube K1, second switch pipe K2, the first inductance L1 and energy-storage units 123 and are operated in decompression mode (buck circuit-mode), and power supply is charged to energy-storage units 123.
In order to increase the life-span of energy-storage units, and the efficiency of raising supplementary power, the invention provides second embodiment, refer to Fig. 5;
In the present embodiment, power supply circuits 12 also include the second voltage sampling unit 124, and described second voltage sampling unit 124 is in parallel with described energy-storage units 123, for the real-time voltage of energy-storage units 123 of sampling, obtain the second voltage sampling signal Uc;
Logic control and driver element 122 be built-in second reference signal Uref2 also, and it is made comparisons with the second voltage sampling signal Uc; Wherein, the supplementary power power threshold QA of the second reference voltage Uref2 correspondence energy-storage units 123, when the storing electricity of energy-storage units 123 reaches supplementary power power threshold QA, energy-storage units 123 is to terminal supplementary power;
Specific works process is as follows:
Logic control and driver element 122 judge the first reference voltage and the size of the first voltage sampling signal;
When the first voltage sampling signal Ua is less than the first reference voltage Uref1, it was shown that terminal requirements electric current is more than the supply current of power supply. Now, if the second voltage sampling signal Uc is more than the second reference signal Uref2, namely, when the storing electricity Qc of energy-storage units 123 is higher than supplementary power power threshold QA, logic control and driver element 122 control the first switching tube K1, second switch pipe K2, the first inductance L1 and energy-storage units 123 and are operated in boost mode (boost circuit-mode), and energy-storage units 123 is to terminal supplementary power; Otherwise, if the second voltage sampling signal Uc is less than the second reference signal Uref2, namely, when the storing electricity Qc of energy-storage units 123 is lower than supplementary power power threshold QA, logic control and driver element 122 control the first switching tube K1 and second switch pipe K2 and disconnect, power supply is only powered to terminal, charges to energy-storage units 123.
When the first voltage sampling signal Ua is more than the first reference voltage Uref1, it was shown that terminal requirements electric current is less than the supply current of power supply, and power supply provides electric current to terminal, and energy-storage units 123 is charged. During charging, logic control and driver element 122 control the first switching tube K1, second switch pipe K2, the first inductance L1 and energy-storage units 123 and are operated in decompression mode (buck circuit-mode).
Additionally when power supply circuits 12 input accesses power supply, and outfan is not when accessing terminal, logic control and driver element 122 also control the first switching tube K1, second switch pipe K2, the first inductance L1 and energy-storage units 123 and are operated in decompression mode (buck circuit-mode), and power supply is charged to energy-storage units 123.
Referring to Fig. 6, an alternative embodiment of the invention;
In the present embodiment, power supply circuits 12 also include the 3rd switching tube K3 being connected between its input and outfan, described 3rd switching tube K3 and are used for controlling the duty of power supply circuits 12, when the 3rd switching tube K3 Guan Bi, power supply circuits 12 normal operation, particularly as follows:
When accessing power supply and terminal when power supply circuits 12, power supply circuits 12 judge the size of the supply current of terminal requirements electric current and power supply, if the former is more than the latter, then determine whether energy-storage units 123 electricity, when energy-storage units 123 electricity is more than supplementary power power threshold, then energy-storage units 123 and power supply are powered to terminal simultaneously;If the storing electricity of energy-storage units 123 is less than supplementary power power threshold, then power supply is only powered to terminal, now because terminal requirements electric current itself has been above the supply current of power supply, even if so energy-storage units 123 electricity is very low, charging without to energy-storage units 123. When power supply circuits 12 do not access terminal or terminal requirements electric current less than supply current, power supply is charged to the energy-storage units 123 in power supply circuits 12.
It should be noted that K3 can be connected between the input of K1 and power supply circuits 12, it is also possible to be connected between the outfan of K1 and power supply circuits 12.
In order to protect power supply circuits and terminal, prevent overcurrent damage, the present embodiment also sets up the first current sampling unit 125, first current sampling unit 125 is sampled the output electric current Iout of power supply circuits 12, supply current that this electric current provides to terminal for power supply and the supply current sum that energy-storage units 123 provides to terminal; The first current sampling signal that first current sampling unit 125 sampling obtains is input to logic control and driver element 122, logic control and the built-in 3rd reference signal Iref of driver element 122, described first current sampling signal and the 3rd reference signal Iref are compared by logic control and driver element 122, when the former is more than the latter, show to occur over-current phenomenon avoidance, after described over-current phenomenon avoidance continues for some time △ t, logic control and driver element 122 control the 3rd switching tube K3 and disconnect, and power supply stops providing the terminal with electric current; Logic control simultaneously and driver element 122 can also control the first switching tube K1 and second switch pipe K2 and disconnect, and now, energy-storage units 123 also stops providing the terminal with electric current.
In order to prevent stream, it is necessary to obtain output electric current and the supply current sum that provides to terminal of energy-storage units that power supply provides to terminal, it is also possible to the supply current exporting electric current and energy-storage units of sampling power supply respectively; Referring specifically to Fig. 7;
In the present embodiment, the first switching tube, second switch pipe and the 3rd switching tube all adopt metal-oxide-semiconductor, respectively Q1, Q2 and Q3, and power supply is adapter 11; Wherein adapter 11 is constant voltage o adapter.
Utilize the sample input current (the output electric current also provided to terminal 13 for power supply) of power supply circuits of the second current sampling unit 126 to obtain the second current sampling signal Ia, utilize the sample supply current of energy-storage units of the 3rd current sampling unit 127 to obtain the 3rd current sampling signal Ic. Second current sampling signal and the 3rd current sampling signal are simultaneously entered logic control and driver element, second current sampling signal and the 3rd current sampling signal are sued for peace by logic control and driver element, and result and the 3rd reference signal Iref are contrasted: when the former is more than the latter, show to occur over-current phenomenon avoidance, after described over-current phenomenon avoidance continues for some time △ t, logic control and driver element control Q3 and disconnect, and power supply stops providing electric current to terminal 13; Logic control simultaneously and driver element can also control Q1 and Q2 and disconnect, and now, energy-storage units also stops 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 is operated in decompression mode (buck mode of operation), and the dutycycle controlling switching tube Q1 can control the charging current that adapter 11 charges to energy-storage units.
When energy-storage units is powered to terminal 13, logic control element controls Q1, Q2, Q3, L1 and energy-storage units is operated in boost mode (boost mode of operation), and the dutycycle controlling switching tube Q1, Q2 can control energy-storage units to the supply current of terminal.
Present invention also offers a kind of supplementary power system, described supplementary power system includes power supply circuits. Referring to Fig. 7, described electric power system also includes adapter and terminal, and terminal 13 is connected to power supply circuits outfan; Adapter 11 connects the input of power supply circuits, is powered to terminal 13 and energy-storage units 123.
Present invention also offers a kind of supplementary power method;
The schematic flow sheet of the first embodiment of described supplementary power method is referring to Fig. 8, and the present embodiment comprises the following steps:
Step S001: judge whether power supply circuits have terminal to access;
Step S002: if power supply circuits accessed terminal, the then size of comparison terminal demand current and adapter supply current;
Step S003: if described terminal requirements electric current is more than described adapter supply current, then described energy-storage units gives described terminal supplementary power, and namely described energy-storage units and described adapter are powered to described terminal simultaneously.
The schematic flow sheet of the second embodiment of described supplementary power method is referring to Fig. 9, the present embodiment arranges supplementary power voltage threshold QA, and the storing electricity of energy-storage units is judged, only when storing electricity is more than supplementary power power threshold QA, described energy-storage units could to terminal supplementary power, and specific works process is as follows:
Step S101, it is judged that whether terminal accesses power supply circuits.
If not accessing, step S102, the charging of described energy-storage units only given by described adapter.
If accessing, step S103, then the size of comparison terminal demand current and adapter supply current;
If described terminal requirements electric current is less than the supply current of described adapter, step S104, described adapter, while powering to terminal, is charged to described energy-storage units.
If described terminal requirements electric current is more than described adapter supply current, step S105, then judge the storing electricity of energy-storage units.
If described storing electricity is less than supplementary power power threshold, step S106, only powered to described terminal by described adapter;
If described storing electricity is more than supplementary power power threshold, step S107, then described energy-storage units and described adapter are powered to described terminal simultaneously.
The schematic flow sheet of the 3rd embodiment of supplementary power method provided by the invention is referring to Figure 10;
In the present embodiment, when described terminal requirements electric current more than the storing electricity of described adapter supply current and described energy-storage units less than supplementary power power threshold time, only powered to terminal by adapter; If power supply circuits do not reset, then only powered to terminal by adapter all the time, and adapter can not charge to energy-storage units, only after power supply circuits check reset, just can again detect, return to step S201; When terminal does not access power supply circuits or terminal requirements electric current less than adapter supply current, then adapter charges to energy-storage units simultaneously. If not resetting, even if terminal does not access power supply circuits or terminal requirements electric current less than adapter supply current, adapter also no longer charges to energy-storage units.
The schematic flow sheet of the 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 circuits recharges to reset and just can carry out, and specific implementation is as follows:
The present embodiment also sets up the low flag bit of storing electricity of energy-storage units, and the low flag bit of described storing electricity has two states, respectively low and high, corresponds to 0 and 1 in the present embodiment;When the low flag bit of described storing electricity is 0, it was shown that energy-storage units has electricity, giving terminal supplementary power at the appropriate time, i.e. when terminal requirements electric current is more than adapter supply current, energy-storage units can give terminal supplementary power.
When the low flag bit of described storing electricity is 1, show that energy-storage units does not have the electricity of storing electricity or storage very low, now, energy-storage units will not give terminal supplementary power, and adapter also can be charged to energy-storage units at the appropriate time, that is, at terminal requirements electric current less than adapter supply current or when not accessing terminal, adapter is charged to energy-storage units.
In order to exactly the low mark of storing electricity be carried out set, the present embodiment also sets up recovery supplementary power power threshold QB, wherein recovers supplementary power voltage threshold QB more than supplementary power power threshold QA.
When energy-storage units has electricity, namely the low flag bit of storing electricity is 0, if now the storing electricity electric discharge of energy-storage units drops to below supplementary power power threshold QA, the low flag bit of storing electricity is set to 1. The situation of described energy-storage units electric discharge includes two kinds: when 1, non-couple in adapter and the low flag bit of storing electricity are 0, terminal is powered by energy-storage units; 2, couple in adapter, but when terminal requirements electric current is 0 more than the low flag bit of adapter supply current and storing electricity, it is carried out supplementary power by energy-storage units.
When energy-storage units does not have electricity or electricity very low, namely the low flag bit of storing electricity is 1, if now the storing electricity of energy-storage units reaches to recover supplementary power voltage threshold QB in charging process, the low flag of storing electricity is set to 0.
Supplementary power method provided by the invention, also includes overcurrent protection function, realizes especially by arranging a cut-off current, the maximum current that described cut-off current corresponding circuits and load can be born. After the supply current of described energy-storage units and the output electric current sum of adapter are continued above certain time period more than the state of cut-off current, described energy-storage units and adapter stop powering to described terminal, until described power supply circuits reset; After described power supply circuits reset, described power supply circuits are reworked.
It should be noted that the protection domain of method of supplying power to that the application provides be not limited to power supply circuits, utilize other circuit or alternate manner to realize the situation of this method of supplying power to also within the protection domain of the application.
Although the present invention is with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art are without departing from the spirit and scope of the present invention; may be by the method for the disclosure above and technology contents and technical solution of the present invention is made possible variation and amendment; therefore; every content without departing from technical solution of the present invention; according to any simple modification, equivalent variations and modification that above example is made by the technical spirit of the present invention, belong to the protection domain of technical solution of the present invention.
Claims (13)
1. power supply circuits, it is characterised in that include the first voltage sampling unit, logic control and driver element, energy-storage units, the first inductance, the first switching tube and second switch pipe;
Described first voltage sampling unit and power supply circuits input, for the input voltage of described power supply circuits of sampling;
Described first switching tube and the series connection of second switch pipe, first end of described first switching tube connects the outfan of described power supply circuits, the common port of described first switching tube and second switch pipe connects the first end of described first inductance, the second end ground connection of described second switch pipe;
Second end of described first inductance connects described energy-storage units one end, the other end ground connection of described energy-storage units; Described logic control and driver element receive the first voltage sampling signal, control the duty of described first switching tube and second switch pipe according to described first voltage sampling signal.
2. power supply circuits as claimed in claim 1, it is characterised in that also include the second voltage sampling unit;
Described second voltage sampling unit is in parallel with described energy-storage units, for detecting the real-time voltage of energy-storage units, and the second voltage sampling signal is exported the duty controlling described first switching tube and second switch pipe to described logic control and driver element, described logic control and driver element according to described second voltage sampling signal.
3. power supply circuits as claimed in claim 1 or 2, it is characterised in that also including the 3rd switching tube, described 3rd switching tube is connected between outfan and the input of described power supply circuits, for controlling the duty of described power supply circuits.
4. power supply circuits as claimed in claim 3, it is characterized in that, also include the first current sampling unit, the output electric current of the described first current sampling unit described power supply circuits of sampling, described logic control and driver element receive the first current sampling signal, and control the duty of described 3rd switching tube according to described first current sampling signal.
5. power supply circuits as claimed in claim 3, it is characterized in that, also include the second current sampling circuit and the 3rd current sampling circuit, the input current of the described second current sampling circuit described power supply circuits of sampling, the supply current of the described 3rd current sampling circuit described energy-storage units of sampling; Described logic control and driver element receive the second current sampling signal and the 3rd current sampling signal, and control the duty of described 3rd switching tube according to described second current sampling signal and the 3rd current sampling signal.
6. a supplementary power system with power supply circuits as claimed in claim 1, it is characterised in that also include adapter and terminal;
Described terminal connects the outfan of described power supply circuits, and described adapter accesses described power supply circuits input, for powering to described terminal or described power supply circuits.
7. a supplementary power method, it is characterised in that include step:
Judge whether power supply circuits access terminal; If accessing, then the size of comparison terminal demand current and adapter supply current;
If described terminal requirements electric current is more than described adapter supply current, then energy-storage units and described adapter are powered to described terminal simultaneously.
8. supplementary power method as claimed in claim 7, it is characterised in that when described power supply circuits do not access described terminal or described terminal requirements electric current less than described adapter supply current, the charging of described energy-storage units given by described adapter.
9. supplementary power method as claimed in claim 7 or 8, it is characterised in that when the storing electricity of described energy-storage units is more than supplementary power power threshold, it is allowed to described memory element powers to described terminal; Otherwise described memory element does not allow to be powered to described terminal.
10. supplementary power method as claimed in claim 9, it is characterized in that, when described terminal requirements electric current more than the storing electricity of described adapter supply current and described energy-storage units less than supplementary power power threshold time, only being powered to described terminal by described adapter, whether power supply circuits inspection simultaneously resets;If resetted, then described power supply circuits are reworked; Otherwise, described adapter continues to power to described terminal.
11. supplementary power method as claimed in claim 9, it is characterized in that, when described terminal requirements electric current is more than described adapter supply current, when the low flag bit of electricity is low, when described energy-storage units discharges into lower than supplementary power power threshold, it is high by low for electricity mark position; When the low flag bit of electricity is high, described energy-storage units need to be charged to higher than after recovering supplementary power power threshold, is low by low for electricity mark position. When the low flag bit of electricity is low, described energy-storage units allows to power to described terminal; When the low flag bit of electricity is high, described energy-storage units powers to described terminal.
12. the supplementary power method as described in any one of claim 7,8, it is characterised in that when described energy-storage units and described adapter are powered simultaneously, it is judged that whether the supply current of described energy-storage units and the output electric current sum of adapter be more than cut-off current;
After the supply current of described energy-storage units and the output electric current sum of adapter are continued above certain time period more than the state of described cut-off current, described energy-storage units and adapter stop powering to described terminal, until described power supply circuits reset; After described power supply circuits reset, described power supply circuits are reworked.
13. the supplementary power method as described in any one of claim 7,8, it is characterised in that judge described terminal requirements electric current and the size of described adapter supply current by detecting the output voltage of described adapter;
When the output voltage of described adapter is lower than the first reference voltage, described terminal requirements electric current is more than described adapter supply current; Otherwise, described terminal requirements electric current is less than described 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 |
| CN118659653A (en) * | 2024-07-12 | 2024-09-17 | 荣耀终端有限公司 | Power supply circuit, electronic device and power supply method |
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| CN105680438B (en) | 2019-05-14 |
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