CN115065127A - Overvoltage protection circuit, charging method and device, electronic equipment and storage medium - Google Patents

Overvoltage protection circuit, charging method and device, electronic equipment and storage medium Download PDF

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Publication number
CN115065127A
CN115065127A CN202210860259.8A CN202210860259A CN115065127A CN 115065127 A CN115065127 A CN 115065127A CN 202210860259 A CN202210860259 A CN 202210860259A CN 115065127 A CN115065127 A CN 115065127A
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CN
China
Prior art keywords
voltage
charging chip
charging
field effect
effect transistor
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Pending
Application number
CN202210860259.8A
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Chinese (zh)
Inventor
王晓雷
肖国坤
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Publication date
Application filed by Vivo Mobile Communication Co Ltd filed Critical Vivo Mobile Communication Co Ltd
Priority to CN202210860259.8A priority Critical patent/CN115065127A/en
Publication of CN115065127A publication Critical patent/CN115065127A/en
Pending legal-status Critical Current

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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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
    • H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • 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
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect 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
    • H02J7/007—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
    • H02J7/02—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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The application discloses an overvoltage protection circuit, a charging method and device, electronic equipment and a storage medium, and belongs to the technical field of electronics. The overvoltage protection circuit includes: a pressure supply assembly; the charging chip is connected with the voltage supply assembly; the charging chip is connected with the battery through the protection component; the control circuit is connected with the charging chip, the protection assembly and the battery; the protection component comprises: one end of the first protection circuit is connected with the output port of the charging chip, and the second end of the first protection circuit is connected with the battery; and the first end of the second protection circuit is connected with the second end of the first protection circuit, and the second end of the second protection circuit is connected between the charging chip and the voltage supply assembly.

Description

Overvoltage protection circuit, charging method and device, electronic equipment and storage medium
Technical Field
The application belongs to the technical field of electronics, and particularly relates to an overvoltage protection circuit, a charging method and device, electronic equipment and a storage medium.
Background
When the electronic equipment is charged wirelessly, if abnormal pumping or abnormal operation (such as a fast moving mobile phone) is performed by a user, the electronic equipment can generate larger pulse voltage in output voltage obtained after rectification of a wireless charging chip in the electronic equipment, and the pulse voltage can damage the wireless charging chip, so that the service life of the wireless charging chip is shortened, a normal wireless charging function cannot be maintained, the use reliability of the wireless charging chip is reduced, and the charging performance of the electronic equipment where the wireless charging chip is located is further reduced.
Disclosure of Invention
An object of the embodiments of the present application is to provide an overvoltage protection circuit, a charging method and apparatus, an electronic device, and a storage medium, which can solve the problem in the prior art that the reliability of a wireless charging chip is low when wireless charging is performed.
In a first aspect, an embodiment of the present application provides an overvoltage protection circuit, including: a pressure supply assembly; the charging chip is connected with the voltage supply assembly; the charging chip is connected with the battery through the protection component; the control circuit is connected with the charging chip, the protection assembly and the battery; the protection component comprises: one end of the first protection circuit is connected with the output port of the charging chip, and the second end of the first protection circuit is connected with the battery; the first end of the second protection circuit is connected with the second end of the first protection circuit, and the second end of the second protection circuit is connected between the charging chip and the voltage supply assembly; when the output voltage of the charging chip is smaller than or equal to the preset value, the output voltage of the charging chip is reduced to a first voltage value through the first protection circuit, or when the output voltage is larger than the preset value, the second protection circuit is used for disconnecting the voltage supply assembly from the charging chip.
In a second aspect, the present embodiments provide a charging method for the overvoltage protection circuit according to the first aspect, the charging method includes: when the output voltage of the charging chip is smaller than or equal to a preset value, reducing the output voltage to a first voltage value, and charging the battery through the charging chip; and under the condition that the output voltage of the charging chip is greater than the preset value, disconnecting the charging chip from the voltage supply assembly.
In a third aspect, embodiments of the present application provide a charging device for an overvoltage protection circuit as in the first aspect, the charging device includes: the processing unit is used for reducing the output voltage to a first voltage value under the condition that the output voltage of the charging chip is less than or equal to a preset value, and charging the battery through the charging chip; the processing unit is further used for disconnecting the charging chip from the voltage supply assembly under the condition that the output voltage of the charging chip is larger than a preset value.
In a fourth aspect, embodiments of the present application provide an electronic device comprising the overvoltage protection circuit as in the first aspect, or alternatively, comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions, when executed by the processor, implementing the steps of the charging method as in the second aspect.
In a fifth aspect, the present application provides a readable storage medium, on which a program or instructions are stored, and when executed by a processor, the program or instructions implement the steps of the charging method according to the second aspect.
In a seventh aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the steps of the charging method according to the second aspect.
In an eighth aspect, the present application provides a computer program product, which is stored in a storage medium and executed by at least one processor to implement the steps of the charging method according to the second aspect.
The overvoltage protection circuit provided by the embodiment of the application comprises a voltage supply assembly, a charging chip, a protection assembly, a battery and a control circuit, wherein the protection assembly comprises a first protection circuit and a second protection circuit. The first end of the first protection circuit is connected with the output port of the charging chip, the second end of the first protection circuit is connected with the battery, and when the output voltage of the charging chip is smaller than or equal to a preset value, the first protection circuit is used for reducing the output voltage of the charging chip to a first voltage. Furthermore, the first end of the second protection circuit is connected with the second end of the first protection circuit, the second end of the second protection circuit is connected between the charging chip and the voltage supply assembly, and when the output voltage of the charging chip is larger than a preset value, the control circuit can control the second protection circuit to disconnect the voltage supply assembly from the charging chip.
Through the overvoltage protection circuit, when the electronic equipment is charged through the charging chip, when the output voltage of the charging chip is smaller than or equal to the preset value, the output voltage of the charging chip is reduced to the first voltage through the first protection circuit, so that the output voltage of the charging chip is clamped below the rated working voltage of the charging chip. When the output voltage of the charging chip is greater than the preset value, the control circuit controls the second protection circuit to work, so that the charging path between the charging chip and the voltage supply assembly is disconnected through the second protection circuit, and the voltage supply assembly is also blocked to supply the alternating current power supply to the charging chip.
Therefore, under the condition that the output voltage of the charging chip is less than or equal to the preset value, the output voltage of the charging chip is clamped through the first protection circuit, even if larger pulse voltage appears in the output voltage obtained after rectification of the charging chip due to abnormal pumping or abnormal operation of a user, the pulse voltage can be reduced to be below the rated working voltage of the charging chip, the charging chip is prevented from being damaged by the pulse voltage, and the service life of the charging chip is ensured. And when the output voltage of the charging chip is greater than the preset value, the second protection circuit directly disconnects the voltage supply assembly from the charging chip, and the voltage supply assembly is blocked from supplying the alternating current power supply to the charging chip. Like this, carry out overvoltage protection to the chip that charges through the duplicate protection mechanism, avoid leading to the great pulse voltage that produces in the output voltage of the chip that charges to cause the damage to the chip that charges because of unusual pump-out carries or user's abnormal operation, guaranteed the life of the chip that charges for the chip that charges can maintain normal function of charging, promoted the use reliability of the chip that charges, and then promoted the electronic equipment's that the chip that charges place charging performance.
Drawings
Fig. 1 is a schematic structural diagram of an overvoltage protection circuit provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of an over-voltage protection circuit according to an embodiment of the present application
FIG. 3 is a graph comparing pulse voltages provided by embodiments of the present application;
fig. 4 is a schematic flowchart of a charging method according to an embodiment of the present disclosure;
fig. 5 is a block diagram of a charging device according to an embodiment of the present disclosure;
fig. 6 is a schematic hardware structure diagram of an electronic device according to an embodiment of the present disclosure;
fig. 7 is a second schematic diagram of a hardware structure of an electronic device according to an embodiment of the present disclosure;
fig. 8 is a third schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application.
Reference numerals in fig. 1 and 2: 100 overvoltage protection circuit, 102 voltage supply component, 104 charging chip, 106 battery, 108 control circuit, 110 protection component, 112 first protection circuit, 114 second protection circuit, 116 first voltage regulator tube, 118 voltage detection component, 120 controller, 122 first field effect tube, 124 second field effect tube, 126 booster circuit, 128 first switch component, 130 second switch component, 132 first capacitor, 134 third field effect tube, 136 fourth field effect tube, 138 fifth field effect tube and 140 sixth field effect tube.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The overvoltage protection circuit, the charging method and apparatus, the electronic device, and the storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, an embodiment of the first aspect of the present application provides an overvoltage protection circuit 100, which includes: a pressure supply assembly 102; the charging chip 104 is connected with the voltage supply assembly 102; the protection component 110 and the battery 106, the charging chip 104 is connected with the battery 106 through the protection component 110; a control circuit 108 connected to the charging chip 104, the protection component 110 and the battery 106; the protection assembly 110 includes: a first protection circuit 112, wherein one end of the first protection circuit 112 is connected to the output port of the charging chip 104, and a second end of the first protection circuit 112 is connected to the battery 106; a second protection circuit 114, wherein a first end of the second protection circuit 114 is connected to a second end of the first protection circuit 112, and a second end of the second protection circuit 114 is connected between the charging chip 104 and the voltage supply assembly 102; when the output voltage of the charging chip 104 is less than or equal to the preset value, the first protection circuit 112 reduces the output voltage of the charging chip 104 to a first voltage value, or when the output voltage is greater than the preset value, the second protection circuit 114 disconnects the voltage supply assembly 102 from the charging chip 104.
It can be understood that, in the process of charging the electronic device by using the wireless charging device, if the electronic device has an abnormal load or a user performs an abnormal operation (for example, moves the electronic device quickly), a larger pulse voltage may appear in the output voltage of the charging chip 104 of the wireless charging device, and when the pulse voltage is greater than the rated operating voltage of the charging chip 104, the charging chip 104 may be damaged, so that the service life of the charging chip 104 is shortened, and the normal charging function cannot be maintained.
In the overvoltage protection circuit 100 provided in the embodiment of the application, when the charging chip 104 is charged, the first protection circuit 112 and the second protection circuit 114 of the protection component 110 can form a dual overvoltage protection mechanism for the charging chip 104, so as to ensure that the charging chip 104 is not damaged by a large pulse voltage, thereby ensuring the service life of the charging chip 104 and maintaining the normal charging function of the charging chip 104.
Specifically, the first protection circuit 112 is a primary overvoltage protection mechanism of the charging chip 104, and when the output voltage of the charging chip 104 is less than or equal to a preset value, the first protection circuit 112 can reduce the output voltage obtained after rectification by the charging chip 104 to a first voltage value, where the first voltage value is generally set to be less than or equal to a voltage value rated by the charging chip 104. In this way, by clamping the output voltage of the charging chip 104 through the first protection circuit 112, even if a larger pulse voltage appears in the output voltage rectified by the charging chip 104 due to abnormal pumping or abnormal operation of a user, the pulse voltage can be reduced to be lower than the rated operating voltage of the charging chip 104, so that the charging chip 104 is prevented from being damaged by the pulse voltage, and the service life of the charging chip 104 is ensured.
For example, as shown in fig. 3 (a), the output voltage obtained after rectification by the charging chip 104 includes a pulse voltage with a voltage value of V1, where the pulse voltage is less than or equal to the preset value, but is greater than the rated operating voltage V0 of the charging chip 104, and thus the charging chip 104 is easily damaged. In addition, the voltage value of the pulse voltage is reduced from V1 to V2 by clamping the pulse voltage by the first protection circuit 112, as shown in fig. 3 (b), and at this time, the voltage value of the pulse voltage is smaller than the rated operating voltage of the charging chip 104. Thus, the charging chip 104 is prevented from being damaged by a larger pulse voltage in the output voltage obtained after rectification by the charging chip 104, and the service life of the charging chip 104 is ensured.
Further, the second protection circuit 114 is a second-level overvoltage protection mechanism of the charging chip 104, and can be triggered only when the first protection circuit 112 fails to protect the first-level overvoltage protection mechanism of the charging chip 104, that is, when the output voltage of the charging chip 104 is greater than a preset value, that is, when the first protection circuit 112 cannot clamp the first output voltage of the charging chip 104 to a normal range, the second-level overvoltage protection mechanism formed by the second protection circuit 114 is triggered.
Specifically, in the charging process, under the condition that the output voltage of the charging chip 104 is judged to be greater than the preset value by the control circuit 108, the control circuit 108 controls the second protection circuit 114 to operate, so as to disconnect the charging path between the charging chip 104 and the voltage supply assembly 102 through the second protection circuit 114, that is, directly disconnect the voltage supply assembly 102 and the charging chip 104 through the second protection circuit 114, so as to block the voltage supply assembly 102 from providing the alternating current power supply for the charging chip 104, and the electronic device is not charged any more.
The preset value is greater than the rated operating voltage of the charging chip 104, and those skilled in the art can set the preset value according to the actual situation of the electronic element of the first protection circuit 112, which is not limited in this embodiment.
To sum up, in the overvoltage protection circuit 100 provided in the embodiment of the present application, when the output voltage of the charging chip 104 is less than or equal to the preset value, the first protection circuit 112 clamps the output voltage of the charging chip 104, so that even if a larger pulse voltage occurs in the output voltage rectified by the charging chip 104 due to abnormal load extraction or abnormal operation of a user, the pulse voltage can be reduced to be lower than the rated working voltage of the charging chip 104, thereby preventing the pulse voltage from damaging the charging chip 104, and ensuring the service life of the charging chip 104. When the output voltage of the charging chip 104 is greater than the preset value, the second protection circuit 114 directly disconnects the voltage supply component 102 from the charging chip 104, and blocks the voltage supply component 102 from supplying the ac power to the charging chip 104. Like this, carry out overvoltage protection to charging chip 104 through the duplicate protection mechanism, avoid causing the damage to charging chip 104 because of the great pulse voltage that produces among the output voltage of abnormal pumping or user's abnormal operation leads to charging chip 104, guaranteed charging chip 104's life for charging chip 104 can maintain normal function of charging, promoted charging chip 104's reliability in utilization, and then promoted charging chip 104 place's electronic equipment's the performance of charging.
In the embodiment of the present application, as shown in fig. 2, the output port of the charging chip 104 includes a first output terminal and a second output terminal, and the first protection circuit 112 includes: a first voltage regulator tube 116, wherein the anode of the first voltage regulator tube 116 is connected with the first output end and the negative electrode of the battery 106, the cathode of the first voltage regulator tube 116 is connected with the second output end, and the first voltage regulator tube 116 is used for reducing the output voltage of the charging chip 104 to a first voltage value; the control circuit 108 includes: and a voltage detection element connected to the cathode of the first voltage regulator tube 116, wherein the voltage detection element is used for detecting the output voltage of the charging chip 104.
During the charging process, the first regulator tube 116 forms a first-stage overvoltage protection mechanism of the charging chip 104, and the output voltage rectified by the charging chip 104 is reduced to a first voltage value through the first regulator tube 116. Thus, even if a larger pulse voltage appears in the output voltage rectified by the charging chip 104 due to abnormal load extraction or abnormal operation of a user, the first voltage regulator tube 116 can clamp the pulse voltage below the rated working voltage of the charging chip 104, so that the pulse voltage is prevented from damaging the charging chip 104, the service life of the charging chip 104 is ensured, and the normal charging function of the charging chip 104 is ensured.
In the charging process, the control circuit 108 detects the output voltage of the charging chip 104 in real time through the voltage detection component 118 to confirm the magnitude of the output voltage, so as to start the second-stage overvoltage protection in time after the output voltage does not conform to the first-stage overvoltage protection mechanism.
In the embodiment of the present application, as shown in fig. 2, the control circuit 108 is further provided with a controller 120, and the second protection circuit 114 is provided with a first fet 122, a second fet 124, and a voltage boost circuit 126.
The controller 120 is connected to the voltage detector, the first fet 122 is disposed between the charging chip 104 and the voltage supply assembly 102, a source of the first fet 122 is connected to the charging chip 104, and a drain of the first fet 122 is connected to the voltage supply assembly 102; the source of the second fet 124 is connected to the gate of the first fet 122, the gate of the second fet 124 is connected to the controller 120, and the drain of the second fet 124 is connected to the negative terminal of the battery 106; the boost circuit 126 is connected to the gate of the first fet 122, the controller 120, the battery 106, and the output port of the charging chip 104.
During the charging process, the first fet 122, the second fet 124, and the boost circuit 126 form a second stage overvoltage protection mechanism for the charging chip 104. In case that the first protection circuit 112 fails to protect the first stage of the over-voltage protection mechanism of the charging chip 104, that is, in case that the first protection circuit 112 cannot clamp the output voltage of the charging chip 104 to the normal range, the second stage of the over-voltage protection mechanism is triggered.
Specifically, during the charging process, the controller 120 detects the output voltage of the charging chip 104 in real time through the voltage detection component 118, and when the output voltage of the charging chip 104 is greater than a preset value, the controller 120 controls the second fet 124 to be turned off, and controls the voltage boost circuit 126 to adjust the voltage between the gate and the source of the first fet 122 to a target voltage, where the target voltage is less than the turn-on voltage of the first fet 122.
That is to say, when the output voltage of the charging chip 104 is greater than the preset value, the voltage between the gate and the source of the first fet 122 is made to be less than the turn-on voltage of the first fet 122 by the boost circuit 126, that is, the first fet 122 is turned off, that is, the charging path between the voltage supply component 102 and the charging chip 104 is turned off, so as to block the voltage supply component 102 from supplying the ac power to the charging chip 104, and the electronic device is no longer charged.
Like this, set up the duplicate protection mechanism and carry out overvoltage protection to charging chip 104, when first level overvoltage protection mechanism became invalid, through the second level overvoltage protection mechanism that comprises first field effect transistor 122, second field effect transistor 124 and boost circuit 126, directly break off the connection between supply voltage and the charging chip 104, no longer charge to electronic equipment, the great pulse voltage who has further avoided producing in charging chip 104's the output voltage causes the damage to charging chip 104, charging chip 104's life has been guaranteed, make charging chip 104 can maintain normal function of charging, charging chip 104's reliability of use has been promoted, and then charging chip 104's the electronic equipment's that is located charging performance has been promoted.
In the embodiment of the present application, as shown in fig. 2, the voltage boost circuit 126 includes a first switch assembly 128, a second switch assembly 130, and a first capacitor 132.
The first switch element 128 is connected to the cathode of the first voltage regulator 116, the gate of the first fet 122, and the controller 120; the second switch assembly 130 is connected to both the negative and positive poles of the battery 106 and the controller 120; two ends of the first capacitor 132 are respectively connected between the first switch assembly 128 and the second switch assembly 130.
During the charging process, the output voltage of the charging chip 104 is detected in real time by the voltage detection component 118 in the control circuit 108, and in the case that the output voltage of the charging chip 104 is greater than the preset voltage threshold, the controller 120 controls the first switch component 128 to be turned on and controls the second switch component 130 to be turned off, so as to adjust the voltage between the gate and the source of the first fet 122 to the target voltage. At this time, the voltage value of the first end of the first capacitor 132 changes from zero to the output voltage of the charging chip 104. On this basis, since the voltage difference between the two ends of the first capacitor 132 cannot change abruptly, the voltage value of the second end of the first capacitor 132 is changed from the power voltage to the sum of the power voltage and the output voltage.
Further, since the source of the first fet 122 is connected to the charging chip 104, the gate of the first fet 122 is connected to the second terminal of the first switch component 128. Therefore, the voltage value of the source of the first fet 122 is equal to the output voltage of the charging chip 104, and the voltage value of the gate of the first fet 122 is equal to the voltage value of the second end of the first capacitor 132, i.e. the sum of the power voltage and the output voltage. That is, at this time, the voltage difference between the gate and the source of the first field effect transistor 122 (i.e., the above-mentioned target voltage) is the power supply voltage of the battery 106, which is smaller than the on voltage of the first field effect transistor 122.
Thus, the first fet 122 is automatically turned off because the voltage difference between the gate and the source of the first fet 122 (i.e., the target voltage) is smaller than the turn-on voltage of the first fet 122. First field effect transistor 122 sets up on the charging path between charging source and charging chip 104, disconnection of first field effect transistor 122 and then leads to the charging path disconnection between charging source and charging chip 104, thereby block that charging source provides alternating current power supply to charging chip 104, no longer charge electronic equipment, in order to further avoid the great pulse voltage who produces to cause the damage to charging chip 104 in charging chip 104's the output voltage, charging chip 104's life has been guaranteed, make charging chip 104 can maintain normal charging function, charging chip 104's reliability in use has been promoted, and then the charging performance of the electronic equipment that charging chip 104 belongs to has been promoted.
In the embodiment of the present application, as shown in fig. 2, the first switching assembly 128 includes a third fet 134 and a fourth fet 136, and the second switching assembly 130 includes a fifth fet 138 and a sixth fet 140.
The source of the third fet 134 is connected to the cathode of the first regulator 116, the drain of the third fet 134 is connected to the first end of the first capacitor 132, the source of the fourth fet 136 is connected to the gate of the first fet 122, and the drain of the fourth fet 136 is connected to the second end of the first capacitor 132. The source of the fifth field effect transistor 138 is connected to the drain of the third field effect transistor 134, and the drain of the fifth field effect transistor 138 is connected to the negative terminal of the battery 106; the source of the sixth fet 140 is connected to the drain of the fourth fet 136, and the drain of the sixth fet 140 is connected to the positive terminal of the battery 106; the gate of the third fet 134, the gate of the fourth fet 136, the gate of the fifth fet 138, and the gate of the sixth fet 140 are all connected to the controller 120.
During the charging process, the output voltage of the charging chip 104 is detected in real time by the control circuit 108, and when the output voltage of the charging chip 104 is less than or equal to a preset value, the second fet 124 is turned on, and the third fet 134 and the fourth fet 136 are controlled to be turned off, and the fifth fet 138 and the sixth fet 140 are controlled to be turned on. At this time, the voltage difference between the two ends of the first capacitor 132 is equal to the power voltage of the battery 106, that is, the voltage value of the first end of the first capacitor 132 is zero, and the voltage value of the second end of the first capacitor 132 is the power voltage.
Further, in the case that the output voltage of the charging chip 104 is greater than the preset value, the control circuit 108 controls the second fet 124 to be turned off, controls the third fet 134 and the fourth fet 136 to be turned on, and controls the fifth fet 138 and the sixth fet 140 to be turned off. At this time, the voltage value of the first end of the first capacitor 132 changes from zero to the output voltage of the charging chip 104, and the voltage value of the second end of the first capacitor 132 also changes from the power voltage to the sum of the power voltage and the output voltage of the charging chip 104. The voltage difference between the gate and the source of the first fet 122 (i.e., the target voltage) is the supply voltage of the battery 106, which is less than the turn-on voltage of the first fet 122.
Thus, the first fet 122 is automatically turned off because the voltage difference between the gate and the source of the first fet 122 (i.e., the target voltage) is smaller than the turn-on voltage of the first fet 122. First field effect transistor 122 sets up on the charging path between charging source and charging chip 104, first field effect transistor 122 disconnection and then lead to supplying to press the charging path disconnection between subassembly 102 and the charging chip 104, thereby block and supply to press subassembly 102 to provide alternating current power supply to charging chip 104, no longer charge electronic equipment, with the great pulse voltage who produces in further avoiding charging chip 104's the output voltage causes the damage to charging chip 104, charging chip 104's life has been guaranteed, make charging chip 104 can maintain normal function of charging, charging chip 104's reliability of use has been promoted, and then charging chip 104's the electronic equipment's that is located charging performance has been promoted.
An embodiment of the second aspect of the present application provides a charging method, an execution subject of the technical solution of the charging method provided in the embodiment of the present application may be a charging device, and may specifically be determined according to an actual use requirement, and the embodiment of the present application is not limited. In order to more clearly describe the charging method provided by the embodiment of the present application, the following method embodiment is exemplarily illustrated by taking an execution subject of the charging method as a charging device.
As shown in fig. 4, the present embodiment provides a charging method, and the charging method 4 is applied to the overvoltage protection circuit according to the first aspect. Specifically, the charging method includes:
s402, acquiring the output voltage of the charging chip;
it can be understood that, in the charging process of the electronic device, if the electronic device has abnormal load extraction or a user performs an abnormal operation (for example, moves the electronic device quickly), a larger pulse voltage appears in the output voltage rectified by the charging chip in the electronic device, and when the pulse voltage is greater than the rated operating voltage of the charging chip, the charging chip is damaged, so that the service life of the charging chip is shortened, and the normal charging function cannot be maintained.
Therefore, the charging device firstly needs to obtain the output voltage of the charging chip to judge the value of the output voltage, specifically, the overvoltage protection circuit comprises a control circuit, a voltage detection component is arranged in the control circuit, and the charging device can obtain the output voltage of the charging chip in real time through the voltage detection component.
S404, when the output voltage is smaller than or equal to the preset value, the output voltage is reduced to a first voltage value, and the battery is charged through the charging chip.
Specifically, when the charging device determines that the output voltage of the charging chip is less than or equal to the preset value, the charging device reduces the output voltage to the first voltage value, and charges the battery through the charging chip.
Specifically, the overvoltage protection circuit is provided with a first protection circuit, the first protection circuit is a first-stage overvoltage protection mechanism of the charging chip in the process of charging the electronic device, and when the output voltage of the charging chip is smaller than or equal to a preset value, the charging device can reduce the output voltage to a second voltage value through the first protection circuit, namely, the output voltage of the charging chip is clamped.
S406, under the condition that the output voltage is larger than the preset value, the connection between the charging chip and the voltage supply assembly is disconnected.
Specifically, under the condition that the charging device judges that the output voltage of the charging chip is greater than the preset value, the charging device disconnects the charging chip from the voltage supply assembly. Specifically, if the output voltage of the charging chip is greater than the preset value, it indicates that the first protection circuit cannot reduce the output voltage of the charging chip to the first voltage value, that is, cannot reduce the output voltage of the charging chip to the normal operating voltage range, and therefore, the charging device needs to disconnect the connection between the charging chip and the voltage supply component to protect the electronic device.
Specifically, in this embodiment of the present application, the overvoltage protection circuit further includes a second protection circuit, and the second protection circuit is a second-stage overvoltage protection mechanism of the charging chip in a process of charging the electronic device. Under the condition that the output voltage of the charging chip is greater than the preset value, the charging device can disconnect a charging path between the charging chip and the voltage supply assembly through the second protection circuit, namely, the second protection circuit directly disconnects the connection between the voltage supply assembly and the charging chip so as to block the voltage supply assembly from providing an alternating current power supply for the charging chip and not charge the electronic equipment any more.
It should be noted that, the preset value is greater than the rated operating voltage of the charging chip, and those skilled in the art can set the preset value according to the actual situation of the electronic element of the first protection circuit, which is not limited herein.
According to the charging method provided by the embodiment of the application, under the condition that the output voltage of the charging chip is smaller than or equal to the preset value, the charging device can clamp the output voltage of the charging chip through the first protection circuit, and even if larger pulse voltage appears in the output voltage obtained after rectification of the charging chip due to abnormal pumping or abnormal operation of a user, the pulse voltage can be reduced to be lower than the rated working voltage of the charging chip, so that the charging chip is prevented from being damaged by the pulse voltage, and the service life of the charging chip is ensured. Under the condition that the output voltage of the charging chip is greater than the preset value, the charging device can directly disconnect the voltage supply assembly from the charging chip through the second protection circuit, and the voltage supply assembly is blocked to supply the alternating current power supply to the charging chip. Like this, carry out overvoltage protection to the chip that charges through the duplicate protection mechanism, avoid leading to the great pulse voltage that produces in the output voltage of the chip that charges to cause the damage to the chip that charges because of unusual pump-out carries or user's abnormal operation, guaranteed the life of the chip that charges for the chip that charges can maintain normal function of charging, promoted the use reliability of the chip that charges, and then promoted the electronic equipment's that the chip that charges place charging performance.
In an embodiment of the present invention, the second protection circuit includes a first fet, a second fet, and a boost circuit, and the S406 may specifically include the following S406 a:
s406 a: and disconnecting the second field effect transistor in the overvoltage protection circuit, and adjusting the voltage between the grid and the source of the first field effect transistor in the overvoltage protection circuit to a target voltage so as to disconnect the charging chip from the voltage supply assembly.
Wherein the target voltage is less than the turn-on voltage of the first field effect transistor.
Specifically, in the process of charging the electronic device, when the output voltage of the charging chip is greater than a preset value, the charging device disconnects the second field-effect transistor in the overvoltage protection circuit, and simultaneously, the voltage between the gate and the source of the first field-effect transistor is adjusted to the target voltage through the voltage boosting circuit in the overvoltage protection circuit.
On the basis, the voltage difference value between the grid electrode and the source electrode of the first field effect transistor (namely the target voltage) is smaller than the turn-on voltage of the first field effect transistor, so that the first field effect transistor can be automatically turned off. First field effect transistor sets up on charging path between charging source and the chip that charges, and first field effect transistor disconnection further leads to supplying to press the charging path disconnection between subassembly and the chip that charges to block and supply to press the subassembly to provide alternating current power supply to the chip that charges, no longer charge electronic equipment, cause the damage to the chip that charges with the great pulse voltage that produces in further avoiding the output voltage of charging the chip.
The above-mentioned embodiment that the application provided, it carries out overvoltage protection to the chip that charges to set up the duplicate protection mechanism, when first order overvoltage protection mechanism became invalid, through by first field effect transistor, the second level overvoltage protection mechanism that second field effect transistor and boost circuit constitute, direct disconnection supply voltage and the chip that charges between be connected, no longer charge electronic equipment, the great pulse voltage who produces in the output voltage of the chip that charges has further been avoided leads to the fact the damage to the chip that charges, the life of the chip that charges has been guaranteed, make the chip that charges can maintain normal charging function, the reliability of use of the chip that charges has been promoted, and then the charging performance of the electronic equipment that the chip that charges was located has been promoted.
In an embodiment of the present invention, the second protection circuit includes a first switch element and a second switch element, and the S406a may specifically include the following S406a 1:
s406a 1: and switching on a first switch component in the overvoltage protection circuit, and switching off a second switch component in the overvoltage protection circuit so as to adjust the voltage between the grid electrode and the source electrode of the first field effect transistor to a target voltage.
In the process of charging the electronic equipment, under the condition that the output voltage of the charging chip is greater than a preset value, the charging device conducts a first switch component in the overvoltage protection circuit and disconnects a second switch component in the overvoltage protection circuit so as to adjust the voltage between the grid electrode and the source electrode of the first field effect transistor to a target voltage.
Specifically, the overvoltage charging circuit further comprises a battery and a control circuit, the control circuit further comprises a controller, the second protection circuit further comprises a first capacitor, the first switch assembly comprises a third field-effect transistor and a fourth field-effect transistor, and the second switch assembly comprises a fifth field-effect transistor and a sixth field-effect transistor. The source electrode of the third field effect tube is connected with the cathode of the first voltage-stabilizing tube, the drain electrode of the third field effect tube is connected with the first end of the first capacitor, the source electrode of the fourth field effect tube is connected with the grid electrode of the first field effect tube, and the drain electrode of the fourth field effect tube is connected with the second end of the first capacitor. The source electrode of the fifth field effect transistor is connected with the drain electrode of the third field effect transistor, and the drain electrode of the fifth field effect transistor is connected with the negative electrode of the battery; the source electrode of the sixth field effect transistor is connected with the drain electrode of the fourth field effect transistor, and the drain electrode of the sixth field effect transistor is connected with the anode of the battery; and the grid electrode of the third field effect transistor, the grid electrode of the fourth field effect transistor, the grid electrode of the fifth field effect transistor and the grid electrode of the sixth field effect transistor are all connected with the controller. In the process of charging the electronic equipment, the output voltage of the charging chip is detected in real time through the control circuit, and under the condition that the output voltage of the charging chip is larger than a preset value, the controller controls the second field effect transistor to be disconnected, controls the third field effect transistor and the fourth field effect transistor to be connected, and controls the fifth field effect transistor and the sixth field effect transistor to be disconnected.
At this time, since the voltage value of the first end of the first capacitor changes from zero to the output voltage of the charging chip, the voltage value of the second end of the first capacitor also changes from the power voltage to the sum of the power voltage and the output voltage of the charging chip. At this time, the voltage difference between the gate and the source of the first fet (i.e., the above-mentioned target voltage) is the supply voltage of the battery, which is smaller than the on voltage of the first fet. Thus, the first fet is automatically turned off because the voltage difference between the gate and the source of the first fet (i.e., the target voltage) is smaller than the turn-on voltage of the first fet. The first field effect transistor is arranged on a charging path between the charging power supply and the charging chip, and the first field effect transistor is disconnected to further cause disconnection of the charging path between the voltage supply assembly and the charging chip, so that the voltage supply assembly is blocked to supply an alternating current power supply to the charging chip, and the electronic equipment is not charged any more.
According to the embodiment provided by the application, under the condition that the output voltage of the charging chip is larger than the preset value, the first switch component in the overvoltage protection circuit is conducted, the second switch component in the overvoltage protection circuit is disconnected, the voltage between the grid electrode and the source electrode of the first field effect transistor is adjusted to the target voltage, the charging path between the charging power supply and the charging chip is disconnected, the charging power supply is blocked to provide the alternating current power supply for the charging chip, and the electronic equipment is not charged any more. Like this, further avoided the great pulse voltage that produces in the output voltage of charging chip to cause the damage to charging chip, guaranteed charging chip's life for charging chip can maintain normal function of charging, has promoted charging chip's use reliability, and then has promoted charging chip's the electronic equipment's that the charging chip belongs to charging performance.
As shown in fig. 5, the embodiment of the present application provides a charging device 500 for the overvoltage protection circuit 100 according to the first aspect. Specifically, the charging device 500 includes: an obtaining unit 502, configured to obtain an output voltage of the charging chip; the processing unit 504 is configured to reduce the output voltage to a first voltage value and charge the battery through the charging chip when the output voltage of the charging chip is less than or equal to a preset value; the processing unit 504 is further configured to disconnect the charging chip from the voltage supply assembly if the output voltage of the charging chip is greater than a preset value.
It can be understood that, in the charging process of the electronic device, if the electronic device has abnormal load pumping or a user performs an abnormal operation (for example, the electronic device is moved quickly), a larger pulse voltage may occur in the output voltage rectified by the charging chip in the electronic device, and when the pulse voltage is greater than the rated operating voltage of the charging chip, the charging chip may be damaged, so that the service life of the charging chip is shortened, and the normal charging function cannot be maintained.
Therefore, first, the obtaining unit 502 needs to obtain the output voltage of the charging chip to determine the magnitude of the value of the output voltage, specifically, the overvoltage protection circuit includes a control circuit, a voltage detection component is disposed in the control circuit, and the obtaining unit 502 can obtain the output voltage of the charging chip in real time through the voltage detection component.
Specifically, in the case that the output voltage of the charging chip is determined to be less than or equal to the preset value, the processing unit 504 reduces the output voltage to the first voltage value, and charges the battery through the charging chip.
Specifically, a first protection circuit is disposed in the overvoltage protection circuit, and in the process of charging the electronic device, the first protection circuit is a first-stage overvoltage protection mechanism of the charging chip, and when the output voltage of the charging chip is less than or equal to a preset value, the processing unit 504 may reduce the output voltage to a second voltage value through the first protection circuit, that is, clamp the output voltage of the charging chip, so that even if a larger pulse voltage occurs in the output voltage rectified by the charging chip due to abnormal pumping or abnormal operation of a user, the processing unit 504 may reduce the pulse voltage to be lower than a rated operating voltage of the charging chip, thereby preventing the pulse voltage from damaging the charging chip and ensuring the service life of the charging chip.
Specifically, in the case that the output voltage of the charging chip is greater than the preset value, the processing unit 504 disconnects the charging chip from the voltage supply assembly. Specifically, if the output voltage of the charging chip is greater than the preset value, it indicates that the first protection circuit cannot reduce the output voltage of the charging chip to the first voltage value, that is, cannot reduce the output voltage of the charging chip to the normal operating voltage range, and therefore, the processing unit 504 needs to disconnect the charging chip from the voltage supply component to protect the electronic device.
Specifically, in this embodiment of the present application, the overvoltage protection circuit further includes a second protection circuit, and the second protection circuit is a second-stage overvoltage protection mechanism of the charging chip in a process of charging the electronic device. When the output voltage of the charging chip is greater than the preset value, the processing unit 504 may disconnect the charging path between the charging chip and the voltage supply module through the second protection circuit, that is, directly disconnect the connection between the voltage supply module and the charging chip through the second protection circuit, so as to block the voltage supply module from supplying the ac power to the charging chip, and thus, the electronic device is not charged any more.
It should be noted that, the preset value is greater than the rated operating voltage of the charging chip, and those skilled in the art can set the preset value according to the actual situation of the electronic element of the first protection circuit, which is not limited herein.
Through the charging device 500 provided by the embodiment of the application, under the condition that the output voltage of the charging chip is less than or equal to the preset value, the processing unit 504 can clamp the output voltage of the charging chip through the first protection circuit, and even if a larger pulse voltage appears in the output voltage obtained after rectification of the charging chip due to abnormal pumping or abnormal operation of a user, the pulse voltage can be reduced to be lower than the rated working voltage of the charging chip, so that the pulse voltage is prevented from damaging the charging chip, and the service life of the charging chip is ensured. When the output voltage of the charging chip is greater than the preset value, the processing unit 504 may directly disconnect the voltage supply component from the charging chip through the second protection circuit, and block the voltage supply component from supplying the ac power to the charging chip. Like this, carry out overvoltage protection to charging chip through the duplicate protection mechanism, avoid leading to the great pulse voltage that produces to cause the damage to charging chip among charging chip's the output voltage because of unusual pump loading or user's abnormal operation, guaranteed charging chip's life for charging chip can maintain normal function of charging, promoted charging chip's use reliability, and then promoted charging chip's the electronic equipment's that charging chip belongs to charging performance.
Further, in this embodiment, the processing unit 504 is further configured to disconnect the second fet in the overvoltage protection circuit, and adjust a voltage between the gate and the source of the first fet in the overvoltage protection circuit to a target voltage, so as to disconnect the charging chip from the voltage supply component; wherein the target voltage is less than the turn-on voltage of the first field effect transistor.
Further, in this embodiment, the processing unit 504 is further configured to turn on a first switching component in the overvoltage protection circuit and turn off a second switching component in the overvoltage protection circuit to adjust the voltage between the gate and the source of the first fet to the target voltage.
The charging apparatus 500 in the embodiment of the present application may be an electronic device, or may be a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or may be a device other than a terminal. The electronic Device may be, for example, a Mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic Device, a Mobile Internet Device (MID), an Augmented Reality (AR)/Virtual Reality (VR) Device, a robot, a wearable Device, an ultra-Mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and may also be a server, a Network Attached Storage (Network Attached Storage, NAS), a personal computer (personal computer, PC), a television (television, TV), an assistant, or a self-service machine, and the embodiments of the present application are not limited in particular.
The charging device 500 in the embodiment of the present application may be a device having an operating system. The operating system may be an Android operating system (Android), an iOS operating system, or other possible operating systems, which is not specifically limited in the embodiments of the present application.
The charging device 500 provided in the embodiment of the third aspect of the present application can implement each process implemented in the embodiment of the method in fig. 4, and is not described herein again to avoid repetition.
Optionally, as shown in fig. 6, an electronic device 600 is further provided in an embodiment of the present application, where the electronic device 600 includes the overvoltage protection circuit 100 of the first aspect. Therefore, the electronic device 600 has all the advantages of the overvoltage protection circuit 100 of the first aspect, and will not be described herein.
Optionally, as shown in fig. 7, an electronic device 700 is further provided in an embodiment of the present application, and includes a processor 702 and a memory 704, where the memory 704 stores a program or an instruction that can be executed on the processor 702, and when the program or the instruction is executed by the processor 702, the steps of the charging method embodiment in the second aspect are implemented, and the same technical effects can be achieved, and are not described again here to avoid repetition.
It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic device and the non-mobile electronic device described above.
Fig. 8 is a schematic diagram of a hardware structure of an electronic device implementing an embodiment of the present application.
The electronic device 800 includes, but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, and a processor 810.
Those skilled in the art will appreciate that the electronic device 800 may further comprise a power source (e.g., a battery) for supplying power to the various components, and the power source may be logically connected to the processor 810 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system. The electronic device structure shown in fig. 8 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description is omitted here.
The electronic device 800 of the embodiment of the present application may be used to implement the steps of the above-described second aspect charging method embodiment.
The processor 810 is configured to obtain an output voltage of the charging chip;
the processor 810 is further configured to reduce the output voltage to a first voltage value and charge the battery through the charging chip when the output voltage is less than or equal to a preset value;
and the processor 810 is further configured to disconnect the charging chip from the voltage supply assembly when the output voltage is greater than a preset value.
In this embodiment of the application, when the output voltage of the charging chip is less than or equal to the preset value, the processor 810 may clamp the output voltage of the charging chip through the first protection circuit, so that even if a larger pulse voltage occurs in the output voltage rectified by the charging chip due to abnormal pumping or abnormal operation of a user, the pulse voltage may be reduced to be lower than the rated working voltage of the charging chip, thereby preventing the pulse voltage from damaging the charging chip, and ensuring the service life of the charging chip. Under the condition that the output voltage of the charging chip is greater than the preset value, the processor 810 can directly disconnect the voltage supply component from the charging chip through the second protection circuit, and block the voltage supply component from supplying the alternating current power supply to the charging chip.
Like this, carry out overvoltage protection to the chip that charges through the duplicate protection mechanism, avoid leading to the great pulse voltage that produces in the output voltage of the chip that charges to cause the damage to the chip that charges because of unusual pump-out carries or user's abnormal operation, guaranteed the life of the chip that charges for the chip that charges can maintain normal function of charging, promoted the use reliability of the chip that charges, and then promoted the electronic equipment's that the chip that charges place charging performance.
Optionally, the processor 810 is specifically configured to: disconnecting the second field effect transistor in the overvoltage protection circuit, and adjusting the voltage between the grid and the source of the first field effect transistor in the overvoltage protection circuit to a target voltage so as to disconnect the charging chip from the voltage supply assembly; wherein the target voltage is less than the turn-on voltage of the first field effect transistor.
The above-mentioned embodiment that the application provided, it carries out overvoltage protection to the chip that charges to set up the duplicate protection mechanism, when first level overvoltage protection mechanism became invalid, processor 810 is through the second level overvoltage protection mechanism that comprises first field effect transistor, second field effect transistor and boost circuit, direct disconnection supply voltage and the chip that charges between be connected, no longer charge electronic equipment, the great pulse voltage that produces in the output voltage of the chip that charges has further been avoided leads to the fact the damage to the chip that charges, the life of the chip that charges has been guaranteed, make the chip that charges can maintain normal function of charging, the use reliability of the chip that charges has been promoted, and then the electronic equipment's that the chip that charges place charging performance has been promoted.
Optionally, the processor 810 is specifically configured to: and switching on a first switch component in the overvoltage protection circuit and switching off a second switch component in the overvoltage protection circuit so as to adjust the voltage between the grid electrode and the source electrode of the first field effect transistor to a target voltage.
In the above embodiment provided by the application, under the condition that the output voltage of the charging chip is greater than the preset value, the processor 810 adjusts the voltage between the gate and the source of the first field effect transistor to the target voltage by turning on the first switch component in the overvoltage protection circuit and turning off the second switch component in the overvoltage protection circuit, so as to turn off the charging path between the charging power supply and the charging chip, thereby blocking the charging power supply from providing the alternating current power supply for the charging chip, and no longer charging the electronic device. Like this, further avoided the great pulse voltage that produces in the output voltage of charging chip to cause the damage to charging chip, guaranteed charging chip's life for charging chip can maintain normal function of charging, has promoted charging chip's use reliability, and then has promoted charging chip's the electronic equipment's that the charging chip belongs to charging performance.
It should be understood that in the embodiment of the present application, the input Unit 804 may include a Graphics Processing Unit (GPU) 8041 and a microphone 8042, and the Graphics Processing Unit 8041 processes image data of a still picture or a video obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072. A touch panel 8071, also referred to as a touch screen. The touch panel 8071 may include two portions of a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.
The memory 809 may be used to store software programs as well as various data. The memory 809 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions required for at least one function (such as a sound playing function, an image playing function, and the like), and the like. Further, the memory 809 can include volatile memory or nonvolatile memory, or the memory 809 can include both volatile and nonvolatile memory.
The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. The volatile Memory may be a Random Access Memory (RAM), a Static Random Access Memory (Static RAM, SRAM), a Dynamic Random Access Memory (Dynamic RAM, DRAM), a Synchronous Dynamic Random Access Memory (Synchronous DRAM, SDRAM), a Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, ddr SDRAM), an Enhanced Synchronous SDRAM (ESDRAM), a Synchronous Link DRAM (SLDRAM), and a Direct Memory bus RAM (DRRAM). The memory 809 in the present embodiment of the application includes, but is not limited to, these and any other suitable types of memory.
Processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor, which primarily handles operations related to the operating system, user interface, and applications, and a modem processor, which primarily handles wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 810.
The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the charging method embodiment of the second aspect, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.
The processor is the processor in the electronic device in the above embodiment. Readable storage media, including computer readable storage media such as computer read only memory ROM, random access memory RAM, magnetic or optical disks, and the like.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the charging method embodiment of the second aspect, and the same technical effect can be achieved.
It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as a system-on-chip, or a system-on-chip.
Embodiments of the present application provide a computer program product, where the program product is stored in a storage medium, and the program product is executed by at least one processor to implement the processes of the charging method embodiment of the second aspect, and achieve the same technical effects, and in order to avoid repetition, details are not repeated here.
It should be noted that, in this document, 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 like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, or a network device) to execute the method of the embodiments of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. An overvoltage protection circuit, comprising:
a pressure supply assembly;
the charging chip is connected with the voltage supply assembly;
the charging chip is connected with the battery through the protection component;
the control circuit is connected with the charging chip, the protection assembly and the battery;
the protection assembly includes:
a first protection circuit, a first end of which is connected with an output port of the charging chip, and a second end of which is connected with the battery;
a first end of the second protection circuit is connected with a second end of the first protection circuit, and a second end of the second protection circuit is connected between the charging chip and the voltage supply assembly;
the output voltage of the charging chip is reduced to a first voltage value through the first protection circuit under the condition that the output voltage of the charging chip is smaller than or equal to a preset value, and the connection between the voltage supply assembly and the charging chip is disconnected through the second protection circuit under the condition that the output voltage is larger than the preset value.
2. The overvoltage protection circuit of claim 1, wherein the output port of the charging chip comprises a first output terminal and a second output terminal, the first protection circuit comprising:
the anode of the first voltage-stabilizing tube is connected with the first output end and the cathode of the battery, the cathode of the first voltage-stabilizing tube is connected with the second output end, and the first voltage-stabilizing tube is used for reducing the output voltage of the charging chip to the first voltage value;
the control circuit includes:
and the voltage detection piece is connected with the cathode of the first voltage-stabilizing tube and is used for detecting the output voltage of the charging chip.
3. The overvoltage protection circuit of claim 2, wherein the control circuit further comprises: the controller is connected with the voltage detection piece;
the second protection circuit includes:
the first field effect transistor is arranged between the charging chip and the voltage supply assembly, a source electrode of the first field effect transistor is connected with the charging chip, and a drain electrode of the first field effect transistor is connected with the voltage supply assembly;
a source electrode of the second field effect transistor is connected with a grid electrode of the first field effect transistor, a grid electrode of the second field effect transistor is connected with the controller, and a drain electrode of the second field effect transistor is connected with a negative electrode of the battery;
the boost circuit is connected with the grid electrode of the first field effect transistor, the controller, the battery and the output port of the charging chip;
the controller is used for disconnecting the second field effect transistor and controlling the booster circuit to adjust the voltage between the grid electrode and the source electrode of the first field effect transistor to a target voltage under the condition that the output voltage is larger than the preset value, and the target voltage is smaller than the starting voltage of the first field effect transistor.
4. The overvoltage protection circuit of claim 3, wherein the boost circuit comprises:
the first switch assembly is connected with the cathode of the first voltage-stabilizing tube, the grid of the first field effect tube and the controller;
the second switch assembly is connected with the negative electrode and the positive electrode of the battery and the controller;
the two ends of the first capacitor are respectively connected between the first switch assembly and the second switch assembly;
the controller is used for conducting the first switch component and disconnecting the second switch component under the condition that the output voltage is larger than the preset value, so that the voltage between the grid electrode and the source electrode of the first field effect transistor is adjusted to the target voltage.
5. The overvoltage protection circuit of claim 4, wherein the first switching component comprises:
a source electrode of the third field effect transistor is connected with a cathode of the first voltage regulator tube, and a drain electrode of the third field effect transistor is connected with the first end of the first capacitor;
a source electrode of the fourth field effect transistor is connected with a grid electrode of the first field effect transistor, and a drain electrode of the fourth field effect transistor is connected with the second end of the first capacitor;
the second switch assembly includes:
a source electrode of the fifth field effect transistor is connected with a drain electrode of the third field effect transistor, and the drain electrode of the fifth field effect transistor is connected with a negative electrode of the battery;
a source electrode of the sixth field effect transistor is connected with a drain electrode of the fourth field effect transistor, and the drain electrode of the sixth field effect transistor is connected with the anode of the battery;
and the grid electrode of the third field effect transistor, the grid electrode of the fourth field effect transistor, the grid electrode of the fifth field effect transistor and the grid electrode of the sixth field effect transistor are all connected with the controller.
6. A charging method for the overvoltage protection circuit according to any one of claims 1 to 5, the charging method comprising:
acquiring the output voltage of the charging chip;
when the output voltage is smaller than or equal to the preset value, reducing the output voltage to the first voltage value, and charging the battery through the charging chip;
and under the condition that the output voltage is greater than the preset value, disconnecting the charging chip from the voltage supply assembly.
7. The charging method according to claim 6, wherein the disconnecting the charging chip from the voltage supply assembly comprises:
disconnecting the second field effect transistor in the overvoltage protection circuit, and adjusting the voltage between the grid and the source of the first field effect transistor in the overvoltage protection circuit to a target voltage so as to disconnect the charging chip from the voltage supply assembly;
wherein the target voltage is less than the turn-on voltage of the first field effect transistor.
8. A charging device for use in the overvoltage protection circuit of any one of claims 1 to 5, the charging device comprising:
the acquisition unit is used for acquiring the output voltage of the charging chip;
the processing unit is used for reducing the output voltage of the charging chip to the first voltage value and charging the battery through the charging chip under the condition that the output voltage of the charging chip is smaller than or equal to the preset value;
the processing unit is further used for disconnecting the charging chip from the voltage supply assembly under the condition that the output voltage of the charging chip is larger than the preset value.
9. An electronic device comprising an overvoltage protection circuit according to any one of claims 1 to 5, or comprising a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions when executed by the processor implementing the steps of the charging method according to claim 6 or 7.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the steps of the charging method according to claim 6 or 7.
CN202210860259.8A 2022-07-21 2022-07-21 Overvoltage protection circuit, charging method and device, electronic equipment and storage medium Pending CN115065127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210860259.8A CN115065127A (en) 2022-07-21 2022-07-21 Overvoltage protection circuit, charging method and device, electronic equipment and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210860259.8A CN115065127A (en) 2022-07-21 2022-07-21 Overvoltage protection circuit, charging method and device, electronic equipment and storage medium

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CN115065127A true CN115065127A (en) 2022-09-16

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