CN216929876U - Power supply circuit and electronic device - Google Patents
Power supply circuit and electronic device Download PDFInfo
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- CN216929876U CN216929876U CN202220284858.5U CN202220284858U CN216929876U CN 216929876 U CN216929876 U CN 216929876U CN 202220284858 U CN202220284858 U CN 202220284858U CN 216929876 U CN216929876 U CN 216929876U
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- power supply
- battery
- voltage conversion
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a power supply circuit and an electronic device, wherein the power supply circuit comprises: the input end of the voltage conversion circuit is connected with a power supply; one end of the first gating circuit is connected with the output end of the voltage conversion circuit, and the other end of the first gating circuit is connected with the battery; one end of the second gating circuit is connected with the output end of the voltage conversion circuit through an inductor, the other end of the second gating circuit is connected with the battery, and one end of the second gating circuit is also connected with the load; the control circuit is used for controlling the power supply to quickly charge the battery through the voltage conversion circuit when the first gating circuit is in a conducting state; when the second gating circuit is in a conducting state, the power supply is controlled to pre-charge or charge the battery at a constant voltage through the voltage conversion circuit, or the battery is controlled to supply power to the load. Therefore, quick charging and pre-charging or constant-voltage charging can be realized through multiplexing of components, and the board distribution area and the cost are reduced.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a power supply circuit and electronic equipment.
Background
In a traditional quick charging scheme, in consideration of improvement of charging efficiency, a Charge Pump (Charge Pump) is usually used for realizing quick charging, but the Charge Pump belongs to an open-loop charging system and cannot complete pre-charging and constant-voltage charging in a battery charging process, so that an additional Buck charging chip (Buck Charger) is required to complete the two processes, the complete battery charging process can be realized only by two chips, a plurality of components are needed, the layout area is large, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a power supply circuit, which can realize fast charging and pre-charging or constant voltage charging through component multiplexing, reduce the use of components, and reduce the board layout area and cost.
A second object of the present invention is to provide an electronic device.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a power supply circuit, including: the input end of the voltage conversion circuit is connected with a power supply; one end of the first gating circuit is connected with the output end of the voltage conversion circuit, and the other end of the first gating circuit is connected with the battery; one end of the second gating circuit is connected with the output end of the voltage conversion circuit through an inductor, the other end of the second gating circuit is connected with the battery, and one end of the second gating circuit is also connected with the load; the control circuit is respectively connected with the voltage conversion circuit, the first gating circuit and the second gating circuit and is used for controlling the power supply to quickly charge the battery through the voltage conversion circuit when the first gating circuit is in a conducting state; when the second gating circuit is in a conducting state, the power supply is controlled to pre-charge or charge the battery at a constant voltage through the voltage conversion circuit, or the battery is controlled to supply power to the load.
According to the power supply circuit, the voltage conversion circuit is shared, and the charge pump function and the voltage reduction charging function can be realized in the same circuit through the matching of the first gating circuit and the second gating circuit, so that the quick charging and the pre-charging or constant voltage charging can be realized through multiplexing of components, the use of the components is reduced, and the board distribution area and the cost are reduced.
In order to achieve the above object, a second embodiment of the utility model provides an electronic device, which includes the foregoing power circuit.
According to the electronic equipment, the power supply circuit, the common voltage conversion circuit and the first gating circuit and the second gating circuit are matched to realize the charge pump and the voltage reduction function in the same circuit, so that the quick charge and the pre-charge or constant voltage charge can be realized through multiplexing of components, the use of the components is reduced, and the board distribution area and the cost are reduced.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of a power circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a power supply circuit according to one embodiment of the present invention;
fig. 3 is a circuit diagram of a power supply circuit according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
A power supply circuit and an electronic device according to an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention. Referring to fig. 1, the power supply circuit 100 includes: a voltage conversion circuit 110, a first gating circuit 120, a second gating circuit 130, and a control circuit 140.
Wherein, the input end of the voltage conversion circuit 110 is connected with the power supply; one end of the first gating circuit 120 is connected to the output end of the voltage conversion circuit 110, and the other end of the first gating circuit 120 is connected to the battery; one end of the second gating circuit 130 is connected to the output end of the voltage converting circuit 110 through the inductor L, the other end of the second gating circuit 130 is connected to the battery, and one end of the second gating circuit 130 is further connected to the load.
The control circuit 140 is respectively connected to the voltage conversion circuit 110, the first gating circuit 120 and the second gating circuit 130, and the control circuit 140 is configured to control the power supply to quickly charge the battery through the voltage conversion circuit 110 when the first gating circuit 120 is in a conducting state; when the second gating circuit 130 is in the on state, the power supply is controlled to pre-charge or charge the battery at a constant voltage through the voltage converting circuit 110, or the battery is controlled to supply power to the load.
Specifically, the circuit shown in fig. 1 may have a charge pump function, a step-down charging function, and a discharging function. The charge pump function refers to the voltage conversion from direct current to direct current by using the energy stored by the capacitor; the step-down charging function is that the inductance energy storage is utilized to carry out direct current-direct current voltage conversion, and the output voltage is lower than the input voltage; the discharge function means that the battery discharges to the outside.
The charge pump function may be implemented by the voltage conversion circuit 110 and the first gating circuit 120. Based on the charging requirement, when the battery needs to be rapidly charged with high power, the control circuit 140 can control the first gating circuit 120 to be in a conducting state, the second gating circuit 130 is in a disconnecting state, and the voltage provided by the power supply is converted by the voltage conversion circuit 110 and then directly enters the battery through the first gating circuit 120 to charge the battery, so that the loss of the whole charging loop is reduced to the lowest level, and the charging efficiency is higher.
The buck charging function may be implemented by the voltage conversion circuit 110, the inductor L, and the second gating circuit 130. Based on the charging requirement, when the battery needs to be pre-charged or charged at a constant voltage, the control circuit 140 may control the second gating circuit 130 to be in an on state, and the first gating circuit 120 to be in an off state, at this time, the voltage provided by the power supply may charge and discharge the inductor L through the voltage conversion circuit 110 to implement voltage conversion, and then enter the battery through the second gating circuit 130 to charge the battery. It should be noted that, since the inductor L is also connected to the load, the load can be supplied with power during the charging of the battery.
The discharge function may be implemented by the second gating circuit 130. Based on the discharging requirement, when the battery is required to supply power to the load, the control circuit 140 may control the second gating circuit 130 to be in the on state, the first gating circuit 120 to be in the off state, and the voltage conversion circuit 150 does not operate, and at this time, the voltage of the battery directly enters the load through the second gating circuit 130, and does not pass through the inductor L, so that not only is the power supply of the battery to the load realized, but also the circuit loss is reduced to the lowest, and the discharging efficiency is higher.
In the above embodiment, the voltage conversion circuit is shared, and the charge pump function and the step-down charging function can be realized in the same circuit through the cooperation of the first gating circuit and the second gating circuit, so that the fast charging and the pre-charging or the constant-voltage charging can be realized through multiplexing of the components, the use of the components is reduced, and the board distribution area and the cost are reduced.
In some embodiments, referring to fig. 2, the voltage conversion circuit 110 includes: a first switch Q1, a second switch Q2, a third switch Q3 and a fourth switch Q4, wherein a first terminal of the first switch Q1 is connected to the input terminal of the voltage conversion circuit 110 (i.e., connected to the power supply), and a control terminal of the first switch Q1 is connected to the control circuit 140; a first terminal of the second switch Q2 is connected to the second terminal of the first switch Q1, and a control terminal of the second switch Q2 is connected to the control circuit 140; the first end of the third switch Q3 is connected to the second end of the second switch Q2 and then connected to the output end of the voltage converting circuit 110 (i.e., connected to the first gating circuit 120 and the inductor L, respectively), and the control end of the third switch Q3 is connected to the control circuit 140; a first terminal of the fourth switch Q4 is connected to the second terminal of the third switch Q3, a second terminal of the fourth switch Q4 is grounded GND, and a control terminal of the fourth switch Q4 is connected to the control circuit 140.
Further, as shown in fig. 2, the first terminal of the second switch Q2 is connected to the second terminal of the first switch Q1 and then connected to one terminal of the first capacitor C1, and the first terminal of the fourth switch Q4 is connected to the second terminal of the third switch Q3 and then connected to the other terminal of the first capacitor C1.
It should be noted that the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 may all be P-type MOS transistors, and when they are P-type MOS transistors, the first end of each switch is a drain, the second end is a source, and the control end is a gate.
Referring to fig. 2, when the high-power fast charging of the battery is required, the first switch Q1 and the third switch Q3 are used as a group to realize synchronous on-off, the second switch Q2 and the fourth switch Q4 are used as a group to realize synchronous on-off, the two groups of switches are complementarily turned on, and simultaneously, the energy storage function of the first capacitor C1 is used to realize the charge pump function, and the battery is charged through the first gating circuit 120.
Specifically, the duty ratio of the switch is D, when T is greater than 0 and less than D × T (T is real time, and T is a switching period of the switch), the first switch Q1 and the third switch Q3 are turned on, the second switch Q2 and the fourth switch Q4 are turned off, and at this time, the first capacitor C1 is charged to store energy and the battery is charged through the first gating circuit 120; when D × T < T, the first switch Q1 and the third switch Q3 are turned off, the second switch Q2 and the fourth switch Q4 are turned on, and the first capacitor C1 is discharged and the battery is charged through the first gating circuit 120. It should be noted that, in order to obtain the best charge transfer efficiency, the duty ratio D may be set to 50%, where the ratio of the output voltage of the power supply circuit 100 to the voltage provided by the power supply source is 1/2, and the charge pump function of 1/2 is implemented.
When the battery needs to be pre-charged or charged with a constant voltage, the battery can be charged through the second gating circuit 130 by controlling the first switch Q1, the second switch Q2, the third switch Q3 and the fourth switch Q4 to be turned on and off.
As an example, the first switch Q1 and the second switch Q2 may be used as a main switch, and the third switch Q3 and the fourth switch Q4 may be used as synchronous switches (functioning as diodes) to realize two-level voltage output.
Specifically, the duty ratio of the switch is D, when T is greater than 0 and less than D × T (T is real time, and T is the switching period of the switch), the first switch Q1 and the second switch Q2 are turned on, the third switch Q3 and the fourth switch Q4 are turned off, and at this time, the inductor L is charged to store energy, and the battery is charged through the second gating circuit 130; when D × T < T, the first switch Q1 and the second switch Q2 are turned off, the third switch Q3 and the fourth switch Q4 are turned on, and the inductor L is discharged and the battery is charged through the second gating circuit 120. It should be noted that the duty ratio D can be adjusted according to the charging requirement to adjust the charging voltage and the charging current of the battery.
As another example, three-level voltage output may be achieved by controlling the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 to be alternately turned on. It should be noted that, when three-level output is performed, the ratio of the output voltage of the power circuit 100 to the voltage provided by the power supply needs to be determined, and if the ratio is smaller than 1/2, the output voltage is switched between Vin/2(Vin is the voltage provided by the power supply, i.e., the input voltage of the power circuit 100) and 0 by turning on and off the switch, so as to implement voltage output of 0-Vin/2; if the ratio is larger than 1/2, the output voltage is switched between Vin/2 and Vin by switching on and off the switch, so as to realize the voltage output of Vin/2-Vin.
Specifically, when the duty ratio D of the switch is less than 0.5, if 0 < T < D × T in one switching period T, the first switch Q1 and the third switch Q3 are controlled to be turned on, the second switch Q2 and the fourth switch Q4 are controlled to be turned off, the first capacitor C1 and the inductor L are charged, and the battery is charged through the second gating circuit 130; if D × T is less than T and less than 0.5T, the first switch Q1 and the second switch Q2 are controlled to be turned off, the third switch Q3 and the fourth switch Q4 are turned on, the first capacitor C1 does not form a loop and is not discharged, the inductor L is discharged, and the battery is charged through the second gating circuit 130; if T is more than 0.5T and less than D × T +0.5T, the first switch Q1 and the second switch Q3 are controlled to be turned off, the second switch Q2 and the fourth switch Q4 are controlled to be turned on, at the moment, the first capacitor C1 discharges, the inductor L charges, and the battery is charged through the second gating circuit 130; if D is T +0.5T < T < T, the first switch Q1 and the second switch Q2 are controlled to be turned off, the third switch Q3 and the fourth switch Q4 are controlled to be turned on, the first capacitor C1 does not form a loop and is not discharged, the inductor L is discharged, and the battery is charged through the second gating circuit 130. In the charging and discharging processes of the first capacitor C1, the output voltage is at most half of the input voltage, and the output voltage can be adjusted within the range of 0 to Vin/2 by adjusting the duty ratio D.
When the duty ratio D of the switch is more than or equal to 0.5 and less than 1, in a switching period T, if T is more than 0 and less than D x T-0.5T, the first switch Q1 and the second switch Q2 are controlled to be switched on, the third switch Q3 and the fourth switch Q4 are controlled to be switched off, the first capacitor C1 does not form a loop, the inductor L is charged, and the battery is charged through the second gating circuit 130; if D is T-0.5T and T is less than 0.5T, the first switch Q1 and the third switch Q3 are controlled to be switched on, the second switch Q2 and the fourth switch Q4 are switched off, the first capacitor C1 is charged to store energy, the inductor L is discharged, and 130 batteries are charged through the second gating circuit; if T is more than 0.5T and less than D T, the first switch Q1 and the second switch Q2 are controlled to be switched on, the third switch Q3 and the fourth switch Q4 are switched off, the first capacitor C1 does not form a loop, the inductor L is charged, and the battery is charged through the second gating circuit 130; if D is T < T < T, the first switch Q1 and the third switch Q3 are controlled to be turned off, the second switch Q2 and the fourth switch Q4 are controlled to be turned on, the first capacitor C1 discharges, the inductor L discharges, and the battery is charged through the second gating circuit 130. In the above process, when 0 < T < D × T-0.5T or 0.5T < D × T, the input voltage is equal to the output voltage since both the first switch Q1 and the second switch Q2 are turned on, and the output voltage is half of the input voltage in the remaining conditions. By adjusting the duty cycle D, it is possible to achieve a regulation of the output voltage in the range Vin/2 to Vin.
In the embodiment, the voltage conversion circuit is shared, the charge pump function and the voltage reduction charging function can be realized in the same circuit through the matching of the first gating circuit and the second gating circuit, the reuse rate of components is high, the integration level is high, the cost is low, and when the battery is charged quickly, the battery can be directly charged through the first gating circuit, and the loss of the inductor and the second gating circuit is avoided.
In some embodiments, as shown with reference to fig. 2, the first gating circuit 120 includes: a first terminal of a fifth switch Q5, a fifth switch Q5 is connected to the output terminal of the voltage conversion circuit 110, a second terminal of the fifth switch Q5 is connected to the battery, and a control terminal of the fifth switch Q5 is connected to the control circuit 140. It should be noted that the fifth switch Q5 can be a P-type MOS transistor, and when the fifth switch Q5 is a P-type MOS transistor, the first terminal thereof is a drain, the second terminal thereof is a source, and the control terminal thereof is a gate.
The second gating circuit 130 includes: a sixth switch Q6, a first terminal of the sixth switch Q6 is connected to the output terminal of the voltage converting circuit 110 through the inductor L, a second terminal of the sixth switch Q6 is connected to the battery, and a control terminal of the sixth switch Q6 is connected to the control circuit 140. It should be noted that, the sixth switch Q6 may be a P-type MOS transistor, and when the sixth switch Q6 is a P-type MOS transistor, the first terminal is a drain, the second terminal is a source, and the control terminal is a gate.
The control circuit 140 can control the on/off of the fifth switch Q5 and the sixth switch Q6 according to the charging requirement, and control the voltage converting circuit 110 in the aforementioned manner, so as to realize the fast charging, the pre-charging, the constant voltage charging of the battery or the power supply to the load.
Specifically, in the process of charging the battery by the power circuit 100, the battery may be pre-charged with a small current, at this time, the sixth switch Q6 may be controlled to be turned on, and the fifth switch Q5 may be turned off, so that the output terminal of the voltage conversion circuit 110 is connected to the battery through the inductor L, and the voltage conversion circuit 110 is controlled in the foregoing manner to pre-charge the battery; after the pre-charging is finished, the constant-current charging can be carried out, at the moment, the quick charging can be carried out, the fifth switch Q5 can be controlled to be switched on, the sixth switch Q6 is switched off, so that the output end of the voltage conversion circuit 100 is directly connected with the battery, and the voltage conversion circuit 110 is controlled through the method so as to carry out the quick charging on the battery; when the voltage of the battery reaches a certain value, the battery can be charged at a constant voltage, and at this time, the sixth switch Q6 can be controlled to be turned on, and the fifth switch Q5 is turned off, so that the output end of the voltage conversion circuit 110 is connected to the battery through the inductor L, and the voltage conversion circuit 110 is controlled in the above manner to charge the battery at a constant voltage.
When power needs to be supplied to the load, the sixth switch Q6 can be controlled to be turned on, and the fifth switch Q5 can be controlled to be turned off, so that the battery is directly connected with the load, and the battery directly supplies power to the load.
In the above embodiment, the on-off of the fifth switch Q5 and the sixth switch Q6 is controlled according to the charging requirement, and the voltage conversion circuit 110 is controlled in the foregoing manner, so that the quick charging, the pre-charging and the constant voltage charging of the battery can be realized, the whole charging process of the battery is further realized, the reuse rate of circuit components is high, the circuit integration level is high, the cost is low, and meanwhile, the power can be supplied to a load.
In some embodiments, referring to fig. 3, the second terminal of the fifth switch Q5 is further connected to the ground GND through the second capacitor C2, so as to filter and smooth the output voltage of the voltage converting circuit 110 when the battery is charged quickly, thereby improving the stability of battery charging. The first end of the sixth switch Q6 is also grounded to GND through the third capacitor C3, so as to filter and smooth the output voltage when the battery is pre-charged or charged at a constant voltage, thereby improving the charging stability of the battery and the power supply stability of the battery when the battery supplies power to a load.
In some embodiments, continuing to refer to fig. 3, the power circuit 100 described above further includes: a first terminal of the seventh switch Q7, a first terminal of the seventh switch Q7 is connected to the power supply, a second terminal of the seventh switch Q7 is connected to the input terminal of the voltage converting circuit 110, and a control terminal of the seventh switch Q7 is connected to the control circuit 140.
It should be noted that, the seventh switch Q7 may be a P-type MOS transistor, and when the seventh switch Q7 is a P-type MOS transistor, the first terminal thereof is a drain, the second terminal thereof is a source, and the control terminal thereof is a gate.
When the power supply charges the battery through the power circuit 100, the control circuit 140 controls the seventh switch Q7 to be turned on; when the battery supplies power to the load, the control circuit 140 controls the seventh switch Q7 to turn off, so as to ensure that the voltage provided by the battery does not flow back into the power supply through the first switch Q1 and the second switch Q2, for example, when the first switch Q1 and the second switch Q2 are PMOS transistors with body diodes, the voltage provided by the battery can be ensured not to flow back into the power supply through the body diodes of the first switch Q1 and the second switch Q2, thereby achieving the effect of protecting the safety of the device.
In some embodiments, as shown with reference to fig. 3, the control circuit 140 includes: a driver 141 and a controller 142, the controller 142 is connected to the voltage conversion circuit 110, the first gate circuit 120, the second gate circuit 130 and the seventh switch Q7 through the driver 141. The controller 142 writes control logic of the power circuit 100 to implement fast charging, pre-charging or constant voltage charging of the battery, and power supply of the battery to the load, which is specifically referred to above and will not be described herein again; the driver 141 is of conventional design and will not be described in detail herein, and incorporates a boost circuit therein to boost the driving voltage sufficiently to open the switches.
Further, as shown in fig. 3, the voltage conversion circuit 110, the first gating circuit 120, the second gating circuit 130, the control circuit 140, and the seventh switch Q7 may be integrated in the same chip 200, and due to multiplexing of the voltage conversion circuit 110, the chip 200 has a high integration level and a high component multiplexing rate, so that the charge pump function, the buck charging function, and the discharging function can be realized at the same time when the voltage conversion circuit 110 is multiplexed, which is beneficial to miniaturization and cost reduction of the chip.
In summary, according to the power supply circuit of the present invention, the charge pump function and the step-down charging function can be realized in the same circuit by sharing the voltage conversion circuit and by matching the first gating circuit and the second gating circuit, so that the fast charging and the pre-charging or the constant-voltage charging can be realized by multiplexing the components, the use of the components is reduced, and the board layout area and the cost are reduced.
In some embodiments, an electronic device is also provided, which includes the aforementioned power supply circuit.
According to the electronic equipment, the voltage conversion circuit is shared through the power supply circuit, the charge pump and the voltage reduction function can be realized in the same circuit through the matching of the first gating circuit and the second gating circuit, so that the fast charging and the pre-charging or the constant voltage charging can be realized through the multiplexing of components, the use of the components is reduced, and the board distribution area and the cost are reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A power supply circuit, comprising:
the input end of the voltage conversion circuit is connected with a power supply;
one end of the first gating circuit is connected with the output end of the voltage conversion circuit, and the other end of the first gating circuit is connected with a battery;
one end of the second gating circuit is connected with the output end of the voltage conversion circuit through an inductor, the other end of the second gating circuit is connected with the battery, and one end of the second gating circuit is also connected with a load;
the control circuit is respectively connected with the voltage conversion circuit, the first gating circuit and the second gating circuit, and is used for controlling the power supply to quickly charge the battery through the voltage conversion circuit when the first gating circuit is in a conducting state; when the second gating circuit is in a conducting state, the power supply is controlled to pre-charge or charge the battery at a constant voltage through the voltage conversion circuit, or the battery is controlled to supply power to the load.
2. The power supply circuit according to claim 1, wherein the voltage conversion circuit comprises:
a first end of the first switch is connected with the input end of the voltage conversion circuit, and a control end of the first switch is connected with the control circuit;
a first end of the second switch is connected with a second end of the first switch, and a control end of the second switch is connected with the control circuit;
the first end of the third switch is connected with the second end of the second switch and then connected with the output end of the voltage conversion circuit, and the control end of the third switch is connected with the control circuit;
and a first end of the fourth switch is connected with the second end of the third switch, a second end of the fourth switch is grounded, and a control end of the fourth switch is connected with the control circuit.
3. The power supply circuit according to claim 2, wherein the first terminal of the second switch is connected to the second terminal of the first switch and then connected to one terminal of a first capacitor, and the first terminal of the fourth switch is connected to the second terminal of the third switch and then connected to the other terminal of the first capacitor.
4. The power supply circuit of claim 1, wherein the first gating circuit comprises:
and a first end of the fifth switch is connected with the output end of the voltage conversion circuit, a second end of the fifth switch is connected with the battery, and a control end of the fifth switch is connected with the control circuit.
5. The power supply circuit of claim 4, wherein the second terminal of the fifth switch is further coupled to ground through a second capacitor.
6. The power supply circuit of claim 1, wherein the second gating circuit comprises:
and a first end of the sixth switch is connected with the output end of the voltage conversion circuit through the inductor, a second end of the sixth switch is connected with the battery, and a control end of the sixth switch is connected with the control circuit.
7. The power supply circuit of claim 6, wherein the first terminal of the sixth switch is further coupled to ground through a third capacitor.
8. The power supply circuit according to claim 1, further comprising:
and a first end of the seventh switch is connected with the power supply, a second end of the seventh switch is connected with the input end of the voltage conversion circuit, and a control end of the seventh switch is connected with the control circuit.
9. The power supply circuit according to claim 8, wherein the voltage conversion circuit, the first gate circuit, the second gate circuit, the control circuit, and the seventh switch are integrally provided in the same chip.
10. The power supply circuit according to claim 8, wherein the control circuit includes a driver and a controller, and the controller is connected to the voltage conversion circuit, the first gate circuit, the second gate circuit, and the seventh switch through the driver.
11. An electronic device, characterized in that it comprises a power supply circuit according to any one of claims 1-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220284858.5U CN216929876U (en) | 2022-02-11 | 2022-02-11 | Power supply circuit and electronic device |
| PCT/CN2022/138687 WO2023151375A1 (en) | 2022-02-11 | 2022-12-13 | Power source circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220284858.5U CN216929876U (en) | 2022-02-11 | 2022-02-11 | Power supply circuit and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN216929876U true CN216929876U (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220284858.5U Active CN216929876U (en) | 2022-02-11 | 2022-02-11 | Power supply circuit and electronic device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN216929876U (en) |
| WO (1) | WO2023151375A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151375A1 (en) * | 2022-02-11 | 2023-08-17 | Oppo广东移动通信有限公司 | Power source circuit and electronic device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697647A (en) * | 2020-06-08 | 2020-09-22 | 珠海市魅族科技有限公司 | Charging circuit, terminal, and control method and device of charging circuit |
| CN113507149B (en) * | 2021-06-29 | 2023-04-28 | 珠海智融科技股份有限公司 | Mixed mode charging circuit and charging method |
| CN113595177A (en) * | 2021-07-12 | 2021-11-02 | 南京矽力微电子技术有限公司 | Mixed-mode charging circuit, system and charging method |
| CN216929876U (en) * | 2022-02-11 | 2022-07-08 | Oppo广东移动通信有限公司 | Power supply circuit and electronic device |
-
2022
- 2022-02-11 CN CN202220284858.5U patent/CN216929876U/en active Active
- 2022-12-13 WO PCT/CN2022/138687 patent/WO2023151375A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023151375A1 (en) * | 2022-02-11 | 2023-08-17 | Oppo广东移动通信有限公司 | Power source circuit and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023151375A1 (en) | 2023-08-17 |
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