CN113725957A - Multi-charge pump control circuit, control method and electronic equipment - Google Patents

Multi-charge pump control circuit, control method and electronic equipment Download PDF

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Publication number
CN113725957A
CN113725957A CN202110942371.1A CN202110942371A CN113725957A CN 113725957 A CN113725957 A CN 113725957A CN 202110942371 A CN202110942371 A CN 202110942371A CN 113725957 A CN113725957 A CN 113725957A
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China
Prior art keywords
charge pump
switch
cell battery
voltage
charge
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Pending
Application number
CN202110942371.1A
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Chinese (zh)
Inventor
陈佳
刘小勇
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Meizu Technology Co Ltd
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Meizu Technology Co Ltd
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Priority to CN202110942371.1A priority Critical patent/CN113725957A/en
Publication of CN113725957A publication Critical patent/CN113725957A/en
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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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
    • 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
    • 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
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The utility model relates to a multi-charge pump control circuit, a control method and an electronic device, wherein the multi-charge pump control circuit comprises a voltage reduction circuit, a control circuit, at least one first charge pump and at least one second charge pump, the control circuit controls the on and off time periods of the voltage reduction circuit, the first charge pump and the second charge pump according to the setting parameters of an external power adapter and the setting parameters of a three-cell battery; the voltage reduction circuit supplies power to the system power supply module in a trickle charge stage, a constant voltage charge stage and a charge stop stage, and charges the three-cell battery through the second charge pump; when the three-cell battery is in a charging state, the output voltage of the second charge pump is larger than the input voltage; the first charge pump charges the three-cell battery in a constant current charging stage; the output voltage of the first charge pump is smaller than the input voltage, and the output current is larger than the input current. Through the technical scheme of the present disclosure, the problem of battery circuit board heating is improved, and the charging efficiency is improved.

Description

Multi-charge pump control circuit, control method and electronic equipment
Technical Field
The disclosure relates to the technical field of charging, in particular to a multi-charge pump control circuit, a control method and electronic equipment.
Background
The current electronic equipment mainly uses a single-cell battery for charging, but because the voltage of the fully charged single-cell battery is about 4.5V, when the charging current of the single-cell battery exceeds 8A, the problem that the end circuit board of the battery generates heat seriously occurs. In addition, the battery connector with smaller impedance and larger current needs to be replaced, which results in the cost increase of charging the single-cell battery, and increases the difficulty of routing and heat dissipation of the battery-side Circuit Board PCB (Printed Circuit Board), and the charging power of the single-cell battery reaches the bottleneck at about 36W.
Disclosure of Invention
In order to solve the technical problems or at least partially solve the technical problems, the present disclosure provides a multi-charge pump control circuit, a control method, and an electronic device, which improve the problem of heat generation of a battery circuit board and improve charging efficiency.
In a first aspect, an embodiment of the present disclosure provides a multiple charge pump control circuit, including:
the external power adapter is respectively and electrically connected with the voltage reduction circuit, the at least one first charge pump and the control circuit, the control circuit is respectively and electrically connected with the voltage reduction circuit, the at least one first charge pump and the at least one second charge pump, the three-cell battery is respectively and electrically connected with the control circuit, the at least one first charge pump and the at least one second charge pump, and the voltage reduction circuit is respectively and electrically connected with the at least one second charge pump and the system power supply module;
the control circuit is used for controlling the on and off time periods of the voltage reduction circuit, the first charge pump and the second charge pump according to the set parameters of the external power adapter and the set parameters of the three-cell battery;
the voltage reduction circuit is used for supplying power to the system power supply module in a trickle charge stage, a constant voltage charge stage and a charge stop stage of the three-cell battery and charging the three-cell battery through the second charge pump; when the three-cell battery is in a charging state, the output voltage of the second charge pump is greater than the input voltage of the second charge pump;
the first charge pump is used for charging the three-cell battery in a constant current charging stage of the three-cell battery; the output voltage of the first charge pump is smaller than the input voltage of the first charge pump, and the output current of the first charge pump is larger than the input current of the first charge pump.
Optionally, the second charge pump is configured to supply power to the system power supply module during a discharging phase of the three-cell battery; when the three-cell battery is in a discharging state, the output voltage of the second charge pump is smaller than the input voltage of the second charge pump.
Optionally, the voltage reduction circuit is configured to perform supplementary charging on the three-cell battery through the second charge pump in a constant current charging stage of the three-cell battery.
Optionally, the first charge pump comprises:
a plurality of first switches and N first capacitors, wherein the first switches are used for controlling the series-parallel connection state of the first capacitors in the first charge pump according to the switch states of the first switches so that the output voltage of the first charge pump is equal to 1/N of the input voltage of the first charge pump; wherein N is an integer greater than 1.
Optionally, the first charge pump is operated alternately in a first period and a second period;
in the first time interval, the first switch controls the first capacitor to form a series connection relation according to the switch state of the first switch;
and in the second time period, the first switch controls the first capacitor to form a parallel connection relation according to the switch state of the first switch.
Optionally, the second charge pump comprises:
the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the second capacitor, the third capacitor and the fourth capacitor;
the second switch and the third switch are connected in series between the input end and the output end of the second charge pump, the fourth switch and the fifth switch are connected in series between the output end and the ground end of the second charge pump, the second capacitor, the sixth switch, the seventh switch and the third capacitor are sequentially connected in series between a first node and a second node, the eighth switch is connected in series between a third node and the ground end, the ninth switch is connected in series between the input end and the fourth node of the second charge pump, the tenth switch is connected in series between the output end and the fifth node of the second charge pump, and the fourth capacitor is connected in series between the output end and the ground end of the second charge pump; the first node is a series node of the second switch and the third switch, the second node is a series node of the fourth switch and the fifth switch, the third node is a series node of the second capacitor and the sixth switch, the fourth node is a series node of the sixth switch and the seventh switch, and the fifth node is a series node of the third capacitor and the seventh switch.
Optionally, the voltage reduction circuit includes:
the eleventh switch is connected between the input end of the voltage reduction circuit and the first end of the first inductor in series, the twelfth switch is connected between a sixth node and a ground end in series, and the second end of the first inductor is used as the output end of the voltage reduction circuit; wherein the sixth node is a series node of the eleventh switch and the first inductor.
In a second aspect, embodiments of the present disclosure also provide a multiple charge pump control method, performed by the multiple charge pump control circuit according to the first aspect, the multiple charge pump control method including:
acquiring set parameters of the external power adapter and set parameters of the three-cell battery;
judging the working stage of the three-cell battery according to the set parameters of the external power adapter and the set parameters of the three-cell battery;
in the trickle charge stage, the constant-voltage charge stage and the charge cut-off stage, controlling the voltage reduction circuit to supply power to the system power supply module and controlling the voltage reduction circuit to charge the three-cell battery through the second charge pump;
and in the constant current charging stage, controlling the first charge pump to charge the three-cell battery.
Optionally, the method further comprises:
in the constant-current charging stage, the voltage reduction circuit is controlled to supplement and charge the three-cell battery through the second charge pump;
in the discharging stage, controlling the second charge pump to supply power to the system power supply module; when the three-cell battery is in a discharging state, the output voltage of the second charge pump is smaller than the input voltage of the second charge pump.
In a third aspect, an embodiment of the present disclosure further provides an electronic device, which includes a three-cell battery and the multiple charge pump control circuit according to the first aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the three-cell battery adopted by the embodiment of the disclosure effectively solves the bottleneck that the single-cell battery cannot further realize high-power charging, improves the problem of heating of a battery circuit board caused by the single-cell battery, improves charging safety, and is beneficial to realizing high-power charging of 100W, 120W and above. In addition, in the trickle charge stage, the constant-voltage charge stage and the charge cut-off stage of the three-cell battery, because the current is small and the heat generation is small, the voltage can be reduced by using the voltage reduction circuit firstly, on one hand, the power is supplied to the system power supply module, and on the other hand, the voltage is increased by using the second charge pump and the three-cell battery is charged. In the constant-current charging stage of the three-cell battery, the first charge pump is used for charging the three-cell battery, the output current of the first charge pump is larger than the input current of the first charge pump, the current transmitted on a charging wire can be reduced when large-current charging is realized, the heating on the charging wire is further improved, the heating of a charging chip and a PCB can be reduced, namely, the overall heating of a charging circuit is reduced, and the higher charging efficiency of the three-cell battery is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a multi-charge pump control circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another multiple charge pump control circuit provided in an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a first charge pump according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of another first charge pump according to an embodiment of the disclosure;
fig. 5 is a schematic structural diagram of a second charge pump according to an embodiment of the disclosure;
fig. 6 is a schematic structural diagram of a voltage step-down circuit according to an embodiment of the disclosure;
fig. 7 is a schematic flow chart of a multi-charge pump control method according to an embodiment of the present disclosure.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Fig. 1 is a schematic structural diagram of a multiple charge pump control circuit according to an embodiment of the present disclosure. As shown in fig. 1, the multiple charge pump control circuit includes a voltage reduction circuit 1, a control circuit 2, at least one first charge pump 3 and at least one second charge pump 4, fig. 1 exemplarily provides the multiple charge pump control circuit including one first charge pump 3 and one second charge pump 4, an external power adapter 5 is electrically connected to the voltage reduction circuit 1, the at least one first charge pump 3 and the control circuit 2, the control circuit 2 is electrically connected to the voltage reduction circuit 1, the at least one first charge pump 3 and the at least one second charge pump 4, respectively, the three-cell battery 6 is electrically connected to the control circuit 2, the at least one first charge pump 3 and the at least one second charge pump 4, respectively, and the voltage reduction circuit 1 is electrically connected to the at least one second charge pump 4 and the system power supply module 7, respectively. Illustratively, the external power adapter 5 may be an AC/DC power adapter, i.e. a DC-to-AC power adapter, and the system power supply module 7 is configured to provide related power to a system in the mobile terminal, so as to ensure that the terminal system can operate normally.
The control circuit 2 is configured to control, according to setting parameters of the external power adapter 5 and setting parameters of the three-cell battery 6, on and off periods of the voltage reduction circuit 1, the first charge pump 3, and the second charge pump 4, where the voltage reduction circuit 1 is configured to supply power to the system power supply module 7 in a trickle charge stage, a constant voltage charge stage, and a charge cut-off stage of the three-cell battery 6, and charge the three-cell battery 6 through the second charge pump 4, when the three-cell battery 6 is in a charge state, an output voltage of the second charge pump 4 is greater than an input voltage of the second charge pump 4, the first charge pump 3 is configured to charge the three-cell battery 6 in a constant current charge stage of the three-cell battery 6, an output voltage of the first charge pump 3 is less than an input voltage of the first charge pump 3, and an output current of the first charge pump 3 is greater than an input current of the first charge pump 3.
The current electronic equipment mainly uses a single-cell battery for charging, but because the voltage of the fully charged single-cell battery is about 4.5V, when the charging current of the single-cell battery exceeds 8A, the problem that the end circuit board of the battery generates heat seriously occurs. In addition, the battery connector with smaller impedance and larger through-current needs to be replaced, so that the charging implementation cost is increased, the difficulty of wiring and heat dissipation of a circuit board at the battery end is increased, and the charging power at the single-cell battery end reaches the bottleneck at about 36W.
In order to realize larger charging power, the electronic equipment can be charged by adopting the double-cell battery, namely, two cells are arranged in one battery, and the two cells are in series connection, so that the charging voltage of the double-cell battery is twice of that of the single-cell battery, for the same battery end charging power, the charging current of the double-cell battery is half of that of the single-cell battery, the heating problem of the circuit board at the end of the double-cell battery is improved to some extent relative to the single-cell battery, the requirement on a battery connector is reduced, and the wiring and heat dissipation difficulty of the circuit board at the end of the battery is also reduced. However, the voltage after the two-cell battery is fully charged is about 9V, and when the charging current of the two-cell battery exceeds 10A, the problem that the end circuit board of the battery generates heat seriously occurs similarly. In addition, the charging rate of the dual-battery cell is still high, and a battery connector with smaller impedance and larger through-flow is also required to be replaced, so that the charging cost is increased, the difficulty in wiring and heat dissipation of a circuit board at the battery end is increased, and the charging power at the dual-battery cell end reaches the bottleneck at about 90W.
The embodiment of the present disclosure adopts the three-cell battery 6, that is, the battery includes three cells, the cells are in a series relationship, the charging voltage of the three-cell battery 6 is 1.5 times of the charging voltage of the dual-cell battery, for the charging power of the same battery end, the charging current of the three-cell battery 6 is 2/3 of the dual-cell charging current, the voltage of the fully charged three-cell battery 6 is about 13.5V, when the charging power is about 90W, the charging current of the three-cell battery 6 is about 6.67A, and the charging current of the dual-cell battery is 10A, which effectively reduces the charging current of the battery, improves the problem of heat generation of the circuit board, and improves the charging safety. In addition, the charging multiplying power of the three-cell battery 6 is reduced, the requirement on a battery connector is further reduced, the charging implementation cost is reduced, the difficulty of wiring and heat dissipation of a battery side circuit board is reduced, and the three-cell battery 6 is used for charging electronic equipment, so that high-power charging of 100W, 120W and above can be achieved. Therefore, the embodiment of the present disclosure adopts the three-cell battery 6 to effectively solve the bottleneck that the single-cell battery cannot further realize high-power charging, improve the problem of heating of the battery circuit board caused by the single-cell battery, improve charging safety, and facilitate realization of high-power charging of 100W, 120W, and above.
Specifically, the charging stage of the three-cell battery 6 includes a trickle charging stage, a constant current charging stage, a constant voltage charging stage, and a charging stop stage, where the trickle charging stage is understood as a pre-charging stage and is a low current charging stage, the constant current charging stage is a stage in which charging is performed using a constant current, the charging voltage of the stage is gradually increased, the constant voltage charging stage is a stage in which charging is performed using a constant voltage, the charging current of the stage is gradually decreased, the charging current of the charging stop stage is gradually decreased, and when the charging current is smaller than a set value, that is, the charging current is decreased to a certain degree, the charging stop stage corresponds to a full state of the three-cell battery 6.
In the trickle charge stage of the three-cell battery 6, when the voltage of the three-cell battery 6 is lower than 9V, the maximum 0.1C, that is, a constant current of 0.1 coulomb, may be used to charge the three-cell battery 6, and at this time, the control circuit 2 determines the port type of the external power adapter 5. Illustratively, the Port type of the external power adapter 5 may be SDP (Standard Downstream Port), DCP (Dedicated Charging Port), or CDP (Charging Downstream Port), which is not specifically limited in this disclosure. At this time, the setting parameter of the external power adapter 5 includes the port type of the external power adapter 5, and the setting parameter of the three-cell battery 6 includes the voltage of the three-cell battery 6.
Specifically, when the port type of the external power adapter 5 is SDP, it indicates that the port is a USB (Universal Serial Bus) interface that can be plugged into a computer, and the through-current of the port is 500mA and the voltage of the port is 5V. When the port type of the external power adapter 5 is CDP, the port is similar to a hub and is a hub having a plurality of interfaces, and the current flowing through the port is 1A to 1.5A and the voltage is 5V. When the port type of the external power adapter 5 is DCP, the control circuit 2 does not perform a boost control protocol with the external power adapter 5. Under the three conditions, the output voltage of the external power adapter 5 is 5V, at this time, the control circuit 2 controls the voltage reduction circuit 1 and the second charge pump 4 to be opened, and controls the first charge pump 3 to be closed, after the voltage reduction circuit 1 performs voltage reduction processing on the power signal output by the external power adapter 5, on one hand, power is supplied to the system power supply module 7, on the other hand, the second charge pump 4 charges the three-cell battery 6, and in a trickle charging stage of the three-cell battery 6, the output voltage of the second charge pump 4 is greater than the input voltage of the second charge pump 4, that is, the second charge pump 4 performs voltage boost processing on the power signal output by the voltage reduction circuit 1 and outputs the power signal to the three-cell battery 6.
In the constant-current charging stage of the three-cell battery 6, when the control circuit 2 monitors that the charging voltage of the three-cell battery 6 is greater than a set voltage threshold and the charging current of the three-cell battery 6 is greater than a set current threshold, for example, 1A or 2A, the control circuit 2 controls the first charge pump 3 to be turned on, a boost control protocol is performed between the control circuit 2 and the external power adapter 5 to control the external power adapter 5 to output dynamic voltage and dynamic current to the first charge pump 3, at this time, the first charge pump 3 charges the three-cell battery 6 with a large current, and the control circuit 2 can also control the voltage reduction circuit 1 to be turned on to supply power to the system power supply module 7. At this time, the setting parameters of the three-cell battery 6 include the charging voltage of the three-cell battery 6 and the charging current of the three-cell battery 6.
In the constant-voltage charging stage and the charge cut-off stage of the three-cell battery 6, when the control circuit 2 monitors that the charging current of the three-cell battery 6 is smaller than the set current threshold, the control circuit 2 does not need to perform a boost control protocol with the external power adapter 5, and controls the external power adapter 5 to output a voltage lower than the voltage of the three-cell battery 6, where the voltage is, for example, 5V or 6V. At this time, the control circuit 2 controls the voltage reduction circuit 1 and the second charge pump 4 to be opened, controls the first charge pump 3 to be closed, and after the voltage reduction circuit 1 performs voltage reduction processing on the power signal output by the external power adapter 5, the power is supplied to the system power supply module 7 on one hand, and the three-cell battery 6 is charged through the second charge pump 4 on the other hand. In the constant-voltage charging stage and the charge ending stage of the three-cell battery 6, the output voltage of the second charge pump 4 is greater than the input voltage of the second charge pump 4, that is, the second charge pump 4 boosts the power signal output by the voltage reduction circuit 1 and outputs the boosted power signal to the three-cell battery 6. At this time, the setting parameter of the three-cell battery 6 includes the charging current of the three-cell battery 6. It should be noted that, in the charging process of the three-cell battery 6, the voltage threshold and the current threshold may be set based on the charging requirement of the three-cell battery 6, and this is not specifically limited in this embodiment of the disclosure.
Therefore, the three-cell battery 6 adopted in the embodiment of the disclosure effectively solves the bottleneck that the single-cell battery cannot further realize high-power charging, improves the problem of heating of the battery circuit board caused by the single-cell battery, improves charging safety, and is beneficial to realizing high-power charging of 100W, 120W and above. In addition, in the trickle charge stage, the constant voltage charge stage and the charge cut-off stage of the three-cell battery 6, since the current is small and the heat generation is small, the voltage reduction circuit 1 can be used for firstly reducing the voltage, so that the system power supply module 7 is supplied with power, and the second charge pump 4 is used for boosting the voltage and charging the three-cell battery 6. In the constant-current charging stage of the three-cell battery 6, the first charge pump 3 is used for charging the three-cell battery 6, the output current of the first charge pump 3 is larger than the input current of the first charge pump 3, the current transmitted on the charging wire can be reduced when large-current charging is realized, the heating on the charging wire is further improved, meanwhile, the heating of a charging chip and a PCB (printed circuit board) can be reduced, namely, the overall heating of a charging circuit is reduced, and the higher charging efficiency of the three-cell battery 6 is ensured.
Fig. 2 is a schematic structural diagram of another multiple charge pump control circuit provided in an embodiment of the present disclosure. Unlike the multiple charge pump control circuit of the structure shown in fig. 1, the multiple charge pump control circuit of the structure shown in fig. 2 includes a plurality of first charge pumps 3, an external power adapter 5 is electrically connected to the plurality of first charge pumps 3, respectively, a control circuit 2 is electrically connected to the plurality of first charge pumps 3, respectively, and a three-cell battery 6 is electrically connected to the plurality of first charge pumps 3, respectively. Specifically, when the charging voltage is the same, the charging current is larger, the charging power is higher, but the heat generation is more, and in order to ensure that the heat generation is reduced as much as possible while the larger charging power of the three-cell battery 6 is ensured, the charging power and the heat generation are balanced, and the applicable charging current range of the single first charge pump 3 may be 4A to 6A.
Therefore, by arranging the multi-charge pump control circuit to comprise a plurality of first charge pumps 3, and the plurality of first charge pumps 3 are connected in parallel, a charge pump circuit suitable for larger charging current is formed, namely, in practical application, the number of the first charge pumps 3 connected in parallel can be selected according to the charging current of the three-cell battery 6, and the larger the charging current of the three-cell battery 6 is, the larger the number of the first charge pumps 3 is, so as to improve the power conversion efficiency of the multi-charge pump control circuit and reduce heat generation. Illustratively, when the charging current of the three-cell battery 6 is 8A to 10A, a multiple charge pump control circuit may be provided that includes two first charge pumps 3, each of which shares the charging current of 4A to 5A; when the charging current of the three-cell battery 6 is 20A, a multi-charge pump control circuit may be provided that includes four first charge pumps 3, each of the first charge pumps 3 sharing the charging current of 5A. It should be noted that, when the charging current of the three telecommunication batteries is other current values or other current ranges, the number of the first charge pumps 3 in the multi-charge pump control circuit may be adjusted accordingly, which is not specifically limited in the embodiment of the present disclosure.
Optionally, with reference to fig. 1 and fig. 2, the second charge pump 4 may be configured to supply power to the system power supply module 7 in a discharging phase of the three-cell battery 6, and when the three-cell battery 6 is in a discharging state, an output voltage of the second charge pump 4 is smaller than an input voltage of the second charge pump 4. Specifically, in the discharging stage of the three-cell battery 6, the control circuit 2 turns on the second charge pump 4, controls the voltage reduction circuit 1 and the first charge pump 3 to be turned off, and when the three-cell battery 6 is in the discharging state, the output voltage of the second charge pump 4 is smaller than the input voltage of the second charge pump 4, that is, the second charge pump 4 performs voltage reduction processing on the power supply signal output by the three-cell battery 6 and supplies power to the system power supply module 7. At this time, the setting parameter of the three-cell battery 6 includes that the three-cell battery 6 is in a discharge state.
In the trickle charge stage, the constant voltage charge stage and the charge stop stage of the three-cell battery 6, the second charge pump 4 performs a boosting function and charges the three-cell battery 6, and in the discharge stage of the three-cell battery 6, because too high voltage is not required for system power supply, the second charge pump 4 reduces the output voltage of the three-cell battery 6 and supplies power to the system power supply module 7.
Optionally, with reference to fig. 1 and fig. 2, the voltage-reducing circuit 1 is configured to supplement charging of the three-cell battery 6 by the second charge pump 4 in the constant-current charging phase of the three-cell battery 6. Specifically, in the constant-current charging phase of the three-cell battery 6, the control circuit 2 may control the voltage reduction circuit 1 and the second charge pump 4 to be turned on, in addition to controlling the first charge pump 3 to be turned on to charge the three-cell battery 6, and the voltage reduction circuit 1 performs supplementary charging on the three-cell battery 6 through the second charge pump 4, where supplementary charging refers to that in the constant-current charging phase of the three-cell battery 6, most of the electric energy of the three-cell battery 6 comes from the first charge pump 3, and the voltage reduction circuit 1 and the second charge pump 4 perform supplementary distribution of only a small part of the current. It can be understood that, because the efficiency of the voltage reduction circuit 1 is not high and the heat generation is large, the voltage reduction circuit 1 only distributes a small part of the current to the three-cell battery 6, and it is determined that the second charge pump 4 can also distribute only a small part of the current to the three-cell battery 6.
Alternatively, the first charge pump 3 may be configured to include a plurality of first switches and N first capacitors, where the first switches are configured to control the series-parallel connection state of the first capacitors in the first charge pump 3 according to their own switch states, so that the output voltage of the first charge pump 3 is equal to 1/N of the input voltage of the first charge pump 3, and N is an integer greater than 1.
Specifically, the existing voltage-reducing circuit generally comprises an LC circuit, the LC circuit is composed of an inductor and a capacitor, the inductor has coil loss and magnetic core loss, and the voltage-reducing conversion efficiency of the whole voltage-reducing circuit is low, and the energy lost by the main power devices is basically converted into heat energy, so that the charging scheme of the voltage-reducing circuit generates heat seriously, and large-current charging cannot be realized. The embodiment of the disclosure utilizes the first charge pump 3 to realize voltage reduction, saves an inductor in a traditional voltage reduction circuit, effectively avoids power loss caused by the inductor, reduces the heat productivity in the charging process, effectively improves the charging efficiency, and is beneficial to realizing high-power charging.
Optionally, the first charge pump 3 alternatively operates in a first time period and a second time period, in the first time period, the first switch controls the first capacitors to form a series connection according to its own switch state, and in the second time period, the first switch controls the first capacitors to form a parallel connection according to its own switch state. Specifically, the voltage division characteristics of all the first capacitors may be set to be the same to form a series or parallel relationship at different time intervals through the first capacitors, respectively, so as to achieve that the output voltage of the first charge pump 3 is equal to 1/N of the input voltage of the first charge pump 3, that is, to achieve the voltage reduction function of the first charge pump 3.
Taking N equal to 2 as an example, fig. 3 is a schematic structural diagram of a first charge pump according to an embodiment of the disclosure. As shown in fig. 3, the first charge pump 3 may be arranged to include two first capacitors C1, i.e. a first capacitor C11 and a first capacitor C12, i.e. N is equal to 2, i.e. the output voltage of the first charge pump 3 is equal to 1/2 of the input voltage of the first charge pump 3, and the output current of the first charge pump 3 is equal to about twice the input current of the first charge pump 3. The first charge pump 3 further includes four first switches K1, i.e., a first switch K11 to a first switch K14, and the specific connection relationship between the first capacitor C1 and the first switch K1 is shown in the figure and will not be described herein. Illustratively, the first charge pump 3 may further include a filter capacitor C01, where the filter capacitor C01 is disposed corresponding to the input VIN of the first charge pump 3, so as to implement the function of filtering out noise. It should be noted that N here refers to the number of the first capacitors C1 that are indispensable in the first charge pump 3, and the filter capacitor C01 may be optional.
As shown in fig. 3, in the first period, the first switch K11 and the first switch K13 are controlled to be turned on, the first switch K12 and the first switch K14 are turned off, the first capacitor C11 and the first capacitor C12 form a series relationship, the first capacitor C11 and the first capacitor C12 are charged, and the voltage across the first capacitor C11 and the voltage across the first capacitor C12 are both approximately equal to 1/2 of the input voltage of the first charge pump 3. In the second period, the first switch K12 and the first switch K14 are controlled to be turned on, the first switch K11 and the first switch K13 are turned off, the first capacitor C11 and the first capacitor C12 form a parallel relationship, the first capacitor C11 and the first capacitor C12 are discharged, the output voltage of the first charge pump 3, namely the voltage on the first capacitor C12, is approximately equal to 1/2 of the input voltage of the first charge pump 3, so that the voltage reduction function of the first charge pump 3 is realized, and the output voltage of the first charge pump 3 is equal to 1/2 of the input voltage of the first charge pump 3.
Taking N equal to 3 as an example, fig. 4 is a schematic structural diagram of another first charge pump according to an embodiment of the disclosure. As shown in fig. 4, the first charge pump 3 may be arranged to include three first capacitors C1, i.e. a first capacitor C11, a first capacitor C12 and a first capacitor C13, i.e. N is equal to 3, i.e. the output voltage of the first charge pump 3 is equal to 1/3 of the input voltage of the first charge pump 3, and the output current of the first charge pump 3 is equal to about three times the input current of the first charge pump 3. The first charge pump 3 further includes seven first switches K1, i.e., a first switch K11 to a first switch K17, and the specific connection relationship between the first capacitor C1 and the first switch K1 is shown in fig. 4 and will not be described herein. Illustratively, the first charge pump 3 may further include a filter capacitor C02, and the filter capacitor C02 is disposed corresponding to the input terminal of the first charge pump 3, so as to implement the function of filtering out noise. It should be noted that N here refers to the number of the first capacitors C1 that are indispensable in the first charge pump 3, and the filter capacitor C02 may be optional.
As shown in fig. 4, in the first period, the first switch K11, the first switch K14 and the first switch K17 are controlled to be turned on, the remaining first switches K1 are turned off, the first capacitor C11, the first capacitor C12 and the first capacitor C13 form a series relationship, the first capacitor C11, the first capacitor C12 and the first capacitor C13 are charged, and the voltage across the first capacitor C11, the voltage across the first capacitor C12 and the voltage across the first capacitor C13 are all approximately equal to 1/3 of the input voltage of the first charge pump 3. In the second period, the first switch K12, the first switch K13, the first switch K15 and the first switch K16 are controlled to be turned on, the remaining first switches K1 are turned off, the first capacitor C11, the first capacitor C12 and the first capacitor C13 form a parallel relationship, the first capacitor C11, the first capacitor C12 and the first capacitor C13 are controlled to be turned off, the output voltage of the first charge pump 3, namely, the voltage on the first capacitor C13 is approximately equal to 1/3 of the input voltage of the first charge pump 3, so that the voltage reduction function of the first charge pump 3 is realized, and the output voltage of the first charge pump 3 is equal to 1/3 of the input voltage of the first charge pump 3.
Fig. 5 is a schematic structural diagram of a second charge pump according to an embodiment of the disclosure. As shown in fig. 5, the second charge pump 4 includes a second switch K2, a third switch K3, a fourth switch K4, a fifth switch K5, a sixth switch K6, a seventh switch K7, an eighth switch K8, a ninth switch K9, a tenth switch K10, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The second switch K2 and the third switch K3 are connected in series between the input terminal VIN and the output terminal VOUT of the second charge pump 4, the fourth switch K4 and the fifth switch K5 are connected in series between the output terminal VOUT of the second charge pump 4 and the ground terminal GND, the second capacitor C2, the sixth switch K6, the seventh switch K7 and the third capacitor C3 are connected in series between the first node N1 and the second node N2, the eighth switch K8 is connected in series between the third node N3 and the ground terminal GND, the ninth switch K9 is connected in series between the input terminal VIN and the fourth node N4 of the second charge pump 4, the tenth switch K10 is connected in series between the output terminal VOUT of the second charge pump 4 and the fifth node N5, and the fourth capacitor C4 is connected in series between the output terminal VOUT of the second charge pump 4 and the ground terminal GND. The first node N1 is a series node of the second switch K2 and the third switch K3, the second node N2 is a series node of the fourth switch K4 and the fifth switch K5, the third node N3 is a series node of the second capacitor C2 and the sixth switch K6, the fourth node N4 is a series node of the sixth switch K6 and the seventh switch K7, and the fifth node N5 is a series node of the third capacitor C3 and the seventh switch K7.
In the trickle charge stage, the constant current charge stage, the constant voltage charge stage and the charge cut-off stage of the three-cell battery 6, the second charge pump 4 realizes the boosting function, that is, the output voltage of the second charge pump 4 is greater than the input voltage of the second charge pump 4, and the output voltage of the second charge pump 4 is approximately equal to three times of the input voltage of the second charge pump 4. When the second charge pump 4 realizes the boosting function, the second charge pump 4 alternately works in a first period and a second period, in the first period, the second switch K2, the fourth switch K4, the seventh switch K7, the eighth switch K8 and the ninth switch K9 are controlled to be turned on, the rest switches are turned off, the second capacitor C2 and the third capacitor C3 are connected in parallel, the second capacitor C2 and the third capacitor C3 are charged, and the voltages on the second capacitor C2 and the third capacitor C3 are approximately equal to the input voltage vin of the second charge pump 4. In the second period, the second switch K2, the fifth switch K5, the sixth switch K6 and the seventh switch K7 are controlled to be turned on, the rest switches are turned off, the input voltage vin of the second charge pump 4 is connected in series with the second capacitor C2, the third capacitor C3 and the fourth capacitor C4, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are discharged, the output voltage is equal to the sum of vin, the voltage on the second capacitor C2 and the voltage on the third capacitor C3, that is, the output voltage of the second charge pump 4 is equal to about three times of the input voltage, and the boosting function of the second charge pump 4 is realized.
In the discharging stage of the three-cell battery 6, the second charge pump 4 implements a voltage reduction function, that is, the output voltage of the second charge pump 4 is less than the input voltage of the second charge pump 4, and the output voltage of the second charge pump 4 is equal to about half of the input voltage of the second charge pump 4. When the second charge pump 4 realizes the voltage reduction function, the second charge pump 4 alternately works in a first time interval and a second time interval, in the first time interval, the second switch K2, the fifth switch K5, the sixth switch K6 and the seventh switch K7 are controlled to be turned on, the other switches are turned off, the input voltage vin of the second charge pump 4 is connected in series with the second capacitor C2, the third capacitor C3 and the fourth capacitor C4, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are charged, and the output voltage vout of the second charge pump 4 is equal to the voltage on the fourth capacitor C4 and is approximately equal to vin/3. In the second period, the third switch K3, the fourth switch K4, the eighth switch K8 and the tenth switch K10 are controlled to be turned on, the rest switches are turned off, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 are connected in parallel, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4 discharge electricity, the output voltage vout of the second charge pump 4 is equal to the voltage on the fourth capacitor C4 and is approximately equal to vin/3, and the voltage reduction function of the second charge pump 4 is achieved. Illustratively, the second charge pump 4 may further include a filter capacitor C03, where the filter capacitor C03 is disposed corresponding to the input terminal of the second charge pump 4, so as to implement the function of filtering out noise.
Fig. 6 is a schematic structural diagram of a voltage step-down circuit according to an embodiment of the disclosure. As shown in fig. 6, the voltage-reducing circuit 1 may include an eleventh switch K11, a twelfth switch K12 and a first inductor L1, the eleventh switch K11 is connected in series between the input terminal VIN of the voltage-reducing circuit 1 and the first end of the first inductor L1, the twelfth switch K12 is connected in series between a sixth node N6 and the ground terminal GND, the second end of the first inductor L2 is used as the output terminal VOUT of the voltage-reducing circuit 1, and the sixth node N6 is a series node of the eleventh switch K11 and the first inductor L1.
Specifically, with reference to fig. 1, fig. 2 and fig. 6, the voltage-reducing circuit 1 includes two operation phases, the first operation phase is a charging phase of the first inductor L1, the first operation phase controls the eleventh switch K11 to be turned on, the twelfth switch K12 is turned off, the first inductor L1 is charged, the eleventh switch K11, the first inductor L1 and the system power supply module 7 form a main loop, and a main current of the circuit flows through the eleventh switch K11, the first inductor L1 and the system power supply module 7. The second working phase is a discharging phase of the first inductor L1, the discharging phase controls the eleventh switch K11 to be turned off, the twelfth switch K12 to be turned on, the first inductor L1 discharges, the twelfth switch K12, the first inductor L1 and the system power supply module 7 form a main loop, and a main current of the circuit flows through the twelfth switch K12, the first inductor L1 and the system power supply module 7. Illustratively, the voltage-reducing circuit 1 may further include a filter capacitor C04 and a filter capacitor C05, the filter capacitor C04 is set corresponding to the input terminal VIN of the voltage-reducing circuit 1, and the filter capacitor C05 is set corresponding to the output terminal VOUT of the voltage-reducing circuit 1, so as to implement the function of filtering out noise waves.
The embodiment of the present disclosure sets the voltage reduction circuit 1 for supplying power to the system power supply module 7, or charges the three-cell battery 6 in a low current charging stage in combination with the second charge pump 4, and does not directly charge the three-cell battery 6, which is beneficial to avoiding the problem of excessive heat generation in the large current charging process, and further improves the charging efficiency.
For example, the switch mentioned in the above embodiments may include a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or other switch transistors known to those skilled in the art, and the embodiment of the present disclosure is not limited thereto.
The embodiment of the disclosure further provides a multi-charge pump control method, which is executed by the multi-charge pump control circuit in the embodiment, and fig. 7 is a schematic flow diagram of the multi-charge pump control method provided by the embodiment of the disclosure. As shown in fig. 7, the multiple charge pump control method includes:
and S110, acquiring the setting parameters of the external power adapter and the setting parameters of the three-cell battery.
According to the description of the above embodiment, the setting parameters of the external power adapter may include a port type of the external power adapter, and the setting parameters of the three-cell battery may include a voltage of the three-cell battery, a charging voltage of the three-cell battery, and a charging current of the three-cell battery.
And S120, judging the working stage of the three-cell battery according to the set parameters of the external power adapter and the set parameters of the three-cell battery.
Specifically, it is determined which stage the three-cell battery is in the trickle charge stage, the constant voltage charge stage, and the charge termination stage, according to the setting parameter of the external power adapter and the setting parameter of the three-cell battery.
And S130, controlling a voltage reduction circuit to supply power to the system power supply module in a trickle charge stage, a constant voltage charge stage and a charge cut-off stage, and controlling the voltage reduction circuit to charge the three-cell battery through a second charge pump.
And S140, in the constant current charging stage, controlling the first charge pump to charge the three-cell battery.
The three-cell battery adopted by the embodiment of the disclosure effectively solves the bottleneck that the single-cell battery cannot further realize high-power charging, improves the problem of heating of a battery circuit board caused by the single-cell battery, improves charging safety, and is beneficial to realizing high-power charging of 100W, 120W and above. In addition, in the trickle charge stage, the constant-voltage charge stage and the charge cut-off stage of the three-cell battery, because the current is small and the heat generation is small, the voltage can be reduced by using the voltage reduction circuit firstly, on one hand, the power is supplied to the system power supply module, and on the other hand, the voltage is increased by using the second charge pump and the three-cell battery is charged. In the constant-current charging stage of the three-cell battery, the first charge pump is used for charging the three-cell battery, the output current of the first charge pump is larger than the input current of the first charge pump, the current transmitted on a charging wire can be reduced when large-current charging is realized, the heating on the charging wire is further improved, the heating of a charging chip and a PCB can be reduced, namely, the overall heating of a charging circuit is reduced, and the higher charging efficiency of the three-cell battery is ensured.
Optionally, the multi-charge pump control method further includes, in a constant-current charging stage, controlling the voltage reduction circuit to supplement charging to the three-cell battery through the second charge pump, and in a discharging stage, controlling the second charge pump to supply power to the system power supply module, where when the three-cell battery is in a discharging state, an output voltage of the second charge pump is smaller than an input voltage of the second charge pump.
The embodiment of the present disclosure further provides an electronic device, where the electronic device includes a three-cell battery and the multiple charge pump control circuit according to the embodiment described above, so that the electronic device has the beneficial effects described in the embodiment described above, and details are not repeated here. Illustratively, the electronic device may be a mobile phone, tablet, mobile computer or other rechargeable electronic device known to those skilled in the art, which is not limited by the embodiments of the present disclosure. In addition, above-mentioned many charge pump control circuit also can be integrated in electronic equipment's charging wire, can flow the undercurrent on most wire rods of charging wire to reduce the generating heat on the wire rod, slow down the loss of wire rod.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A multiple charge pump control circuit, comprising:
the external power adapter is respectively and electrically connected with the voltage reduction circuit, the at least one first charge pump and the control circuit, the control circuit is respectively and electrically connected with the voltage reduction circuit, the at least one first charge pump and the at least one second charge pump, the three-cell battery is respectively and electrically connected with the control circuit, the at least one first charge pump and the at least one second charge pump, and the voltage reduction circuit is respectively and electrically connected with the at least one second charge pump and the system power supply module;
the control circuit is used for controlling the on and off time periods of the voltage reduction circuit, the first charge pump and the second charge pump according to the set parameters of the external power adapter and the set parameters of the three-cell battery;
the voltage reduction circuit is used for supplying power to the system power supply module in a trickle charge stage, a constant voltage charge stage and a charge stop stage of the three-cell battery and charging the three-cell battery through the second charge pump; when the three-cell battery is in a charging state, the output voltage of the second charge pump is greater than the input voltage of the second charge pump;
the first charge pump is used for charging the three-cell battery in a constant current charging stage of the three-cell battery; the output voltage of the first charge pump is smaller than the input voltage of the first charge pump, and the output current of the first charge pump is larger than the input current of the first charge pump.
2. The multi-charge pump control circuit of claim 1, wherein the second charge pump is configured to supply power to the system power supply module during a discharge phase of the three-cell battery; when the three-cell battery is in a discharging state, the output voltage of the second charge pump is smaller than the input voltage of the second charge pump.
3. The multi-charge pump control circuit of claim 1, wherein the voltage reduction circuit is configured to supplement charging of the three-cell battery by the second charge pump during a constant current charging phase of the three-cell battery.
4. The multiple charge pump control circuit of claim 1, wherein the first charge pump comprises:
a plurality of first switches and N first capacitors, wherein the first switches are used for controlling the series-parallel connection state of the first capacitors in the first charge pump according to the switch states of the first switches so that the output voltage of the first charge pump is equal to 1/N of the input voltage of the first charge pump; wherein N is an integer greater than 1.
5. A multi-charge pump control circuit according to claim 4, wherein the first charge pump is operated alternately for a first period of time and a second period of time;
in the first time interval, the first switch controls the first capacitor to form a series connection relation according to the switch state of the first switch;
and in the second time period, the first switch controls the first capacitor to form a parallel connection relation according to the switch state of the first switch.
6. The multiple charge pump control circuit of claim 1, wherein the second charge pump comprises:
the second switch, the third switch, the fourth switch, the fifth switch, the sixth switch, the seventh switch, the eighth switch, the ninth switch, the tenth switch, the second capacitor, the third capacitor and the fourth capacitor;
the second switch and the third switch are connected in series between the input end and the output end of the second charge pump, the fourth switch and the fifth switch are connected in series between the output end and the ground end of the second charge pump, the second capacitor, the sixth switch, the seventh switch and the third capacitor are sequentially connected in series between a first node and a second node, the eighth switch is connected in series between a third node and the ground end, the ninth switch is connected in series between the input end and the fourth node of the second charge pump, the tenth switch is connected in series between the output end and the fifth node of the second charge pump, and the fourth capacitor is connected in series between the output end and the ground end of the second charge pump; the first node is a series node of the second switch and the third switch, the second node is a series node of the fourth switch and the fifth switch, the third node is a series node of the second capacitor and the sixth switch, the fourth node is a series node of the sixth switch and the seventh switch, and the fifth node is a series node of the third capacitor and the seventh switch.
7. The multiple charge pump control circuit of claim 1, wherein the voltage reduction circuit comprises:
the eleventh switch is connected between the input end of the voltage reduction circuit and the first end of the first inductor in series, the twelfth switch is connected between a sixth node and a ground end in series, and the second end of the first inductor is used as the output end of the voltage reduction circuit; wherein the sixth node is a series node of the eleventh switch and the first inductor.
8. A multiple charge pump control method performed by a multiple charge pump control circuit according to any one of claims 1-7, the multiple charge pump control method comprising:
acquiring set parameters of the external power adapter and set parameters of the three-cell battery;
judging the working stage of the three-cell battery according to the set parameters of the external power adapter and the set parameters of the three-cell battery;
in the trickle charge stage, the constant-voltage charge stage and the charge cut-off stage, controlling the voltage reduction circuit to supply power to the system power supply module and controlling the voltage reduction circuit to charge the three-cell battery through the second charge pump;
and in the constant current charging stage, controlling the first charge pump to charge the three-cell battery.
9. A multiple charge pump control method according to claim 8, further comprising:
in the constant-current charging stage, the voltage reduction circuit is controlled to supplement and charge the three-cell battery through the second charge pump;
in the discharging stage, controlling the second charge pump to supply power to the system power supply module; when the three-cell battery is in a discharging state, the output voltage of the second charge pump is smaller than the input voltage of the second charge pump.
10. An electronic device comprising a three-cell battery as claimed in any one of claims 1 to 7 and a multiple charge pump control circuit.
CN202110942371.1A 2021-08-17 2021-08-17 Multi-charge pump control circuit, control method and electronic equipment Pending CN113725957A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023151364A1 (en) * 2022-02-08 2023-08-17 Oppo广东移动通信有限公司 Charging circuit, charging method, electronic device, and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023151364A1 (en) * 2022-02-08 2023-08-17 Oppo广东移动通信有限公司 Charging circuit, charging method, electronic device, and storage medium

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