CN216489870U - Charging circuit and electronic device - Google Patents
Charging circuit and electronic device Download PDFInfo
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- CN216489870U CN216489870U CN202220180454.1U CN202220180454U CN216489870U CN 216489870 U CN216489870 U CN 216489870U CN 202220180454 U CN202220180454 U CN 202220180454U CN 216489870 U CN216489870 U CN 216489870U
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Abstract
The present disclosure relates to a charging circuit and an electronic device. The charging circuit includes: the charging interface module is used for transmitting a charging signal; the power management chip is electrically connected to the charging interface module; the first protection module is electrically connected with the output end of the charging interface module and the other end of the charging interface module in a grounded mode, the first protection module is connected with the power management chip in parallel, and the first protection module is used for being started when the charging signal is larger than a first preset threshold value so as to discharge the charging signal.
Description
Technical Field
The present disclosure relates to the field of terminal technologies, and in particular, to a charging circuit and an electronic device.
Background
The electronic device is usually required to be connected to an external commercial power through a data line and a charger, so as to supply power to the electronic device or charge a battery. However, at the moment when the electronic device is connected to the external mains supply, a surge signal much higher than the steady-state voltage may be generated, and an excessive surge easily causes impact and damage to the electronic components in the electronic device related to the connection of the data line.
SUMMERY OF THE UTILITY MODEL
The present disclosure provides a charging circuit and an electronic device to solve the disadvantages of the related art.
According to a first aspect of the embodiments of the present disclosure, there is provided a charging circuit, including:
the charging interface module is used for transmitting a charging signal;
the power management chip is electrically connected to the charging interface module;
the first protection module is electrically connected with the output end of the charging interface module and the other end of the charging interface module in a grounded mode, the first protection module is connected with the power management chip in parallel, and the first protection module is used for being started when the charging signal is larger than a first preset threshold value so as to discharge the charging signal.
Optionally, the method further includes:
and the second protection module is electrically connected with one end of the power management chip, the other end of the second protection module is grounded, the second protection module is connected with the power management chip in parallel, and the second protection module is used for starting when the residual voltage signal of the discharged charging signal is greater than a second preset threshold value so as to discharge the residual voltage signal.
Optionally, the second protection module includes a second transient diode.
Optionally, the method further includes:
the energy attenuation circuit is connected between the charging interface module and the power management chip in series and connected with the first protection module in parallel, and is used for attenuating the charging signal.
Optionally, the method further includes:
the first circuit board is electrically connected with the charging interface module, and the first protection module is arranged on the first circuit board;
the second circuit board is electrically connected with the power management chip;
the third circuit board is electrically connected with the first circuit board and the second circuit board so as to conduct the charging interface module and the power management chip;
the energy attenuation circuit board is arranged on the first circuit board and/or the second circuit board.
Optionally, the energy attenuation circuit includes:
a first energy attenuation circuit disposed on the first circuit board and in parallel with the first protection module;
a second energy attenuation circuit disposed at the second circuit board.
Optionally, the energy attenuation circuit comprises a first resistor or a plurality of first resistors connected in series.
Optionally, the battery further comprises a battery, the battery comprises a battery core and a battery protection board connected with the battery core, the battery protection board is electrically connected to the charging interface module, and the first protection module is connected with the battery protection board in parallel.
Optionally, the first protection module includes a first transient diode.
According to a second aspect of the embodiments of the present disclosure, there is provided an electronic device including the charging circuit according to any one of the embodiments described above.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
according to the embodiment, in the technical scheme of the disclosure, the first protection module is arranged close to the charging interface module, and can be started when the charging signal is greater than the first preset threshold value through the first protection module to release the charging signal, so that other circuits at the rear end of the charging interface module can be protected; moreover, because the path from the charging interface module to the first protection module is shortened, the voltage drop generated by the parasitic resistance of the conductive wire is relatively reduced, and the voltage generated by the surge reaching the first protection module is relatively higher.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
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.
Fig. 1 is a simplified schematic diagram of a charging circuit shown in accordance with an exemplary embodiment.
Fig. 2 is a simplified schematic diagram of another charging circuit shown in accordance with an exemplary embodiment.
Fig. 3 is a simplified schematic diagram of yet another charging circuit shown in accordance with an exemplary embodiment.
Fig. 4 is a schematic structural diagram of an electronic device according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Fig. 1 is a schematic diagram illustrating a charging circuit 100 according to an exemplary embodiment. The charging circuit 100 may include a charging interface module 1, a power management chip 2, and a first protection module 3. The charging interface module 1 can be used for being electrically connected with an external commercial power through a data line, the power management chip 2 is electrically connected to the charging interface module 1, one end of the first protection module 3 is electrically connected to the output end of the charging interface module 1, the other end of the first protection module is grounded, and the first protection module 3 is connected with the power management chip 2 in parallel. It can be understood that at the moment when the charging interface module 1 is connected to the external commercial power, a surge far exceeding a steady-state signal is often generated, and the generation of the surge is very easy to damage the subsequent circuit elements of the charging interface module 1, resulting in an abnormality of the charging circuit 100.
Therefore, in the technical scheme of the present disclosure, the first protection module 3 is connected to the output end of the charging interface module 1, that is, the first protection module 3 is a first-stage circuit in a rear-stage circuit of the charging interface module 1, so that the first protection module 3 can be turned on when the charging signal is greater than a first preset threshold to discharge the charging signal, where the first preset threshold can be determined according to the voltage stabilization state of the charging signal, and when the charging signal is greater than the first preset threshold, the charging circuit 100 is considered to generate a surge, and the first-stage circuit at the rear end of the charging interface module 1, that is, the first protection module 3, can play a role in discharging, thereby being beneficial to protecting other circuits at the rear end of the charging interface module 1. Moreover, the first protection module 3 is arranged close to the charging interface module 1, and due to the shortened path, the voltage drop caused by the parasitic resistance of the conductive wire is relatively reduced, so that the voltage reaching the first protection module 3 due to the surge is relatively higher, and compared with the scheme that the first protection module 3 is arranged at the rear end, the probability that the residual voltage after being reduced by the parasitic resistance is not enough to open the first protection module 3 and exceeds the tolerance limit of the power management chip 2 is reduced.
The charging interface module 1 may include a USB interface, such as a Type-c interface. The first protection module 3 may include a first transient diode, and the first transient diode can bear higher energy of a surge signal than an ESD (Electro-Static discharge) device in the related art, and can perform a function of quickly discharging and reducing a residual voltage. The first transient diode may include a bidirectional transient diode or a unidirectional transient diode, and may be designed as needed, which is not limited by the present disclosure. It should be noted that, in this embodiment, only the circuit path through which the charging interface module 1 communicates with the power management chip 2 is taken as an exemplary illustration, and in some embodiments, other circuits may be designed between the charging interface module 1 and the power management chip 2, which is not limited by this disclosure.
Further, as shown in fig. 2, the charging circuit 100 may further include a second protection module 4, one end of the second protection module 4 is electrically connected to the power management chip 2, and the other end of the second protection module 4 is grounded, the second protection module 4 is connected in parallel with the power management chip 2, and the second protection module 4 is a last stage circuit in a front end circuit of the power management chip 2, and the second protection module 4 may be configured to be turned on when a residual voltage signal after the charging signal is discharged is greater than a second preset threshold value, so as to discharge the residual voltage signal. In this way, the power management chip 2 can be protected by the second protection module 4 in a double surge mode, or the power management chip 2 can be protected in a situation where some surges are not enough to turn on the first protection module 3 but have exceeded the endurance limit of the power management chip 2. Similarly, the second protection module 4 may comprise a second transient diode by which the bleed efficiency and the energy bled may be increased.
Still as shown in fig. 2, the charging circuit 100 may further include an energy attenuation circuit 5, the energy attenuation circuit 5 may be connected in series between the charging interface module 1 and the power management chip 2, and the energy attenuation circuit 5 may be connected in parallel with the first protection module 3 and the second protection module 4, and the charging signal may be attenuated by the energy attenuation circuit 5. For example, in some cases, when the residual voltage discharged by the first protection module 3 or the residual voltage discharged by the first protection module 3 and the second protection module 4 exceeds the tolerance limit of the power management chip 2, a part of the voltage may be shared by the internal resistance of the energy attenuation circuit 5, so as to improve the probability that the discharged residual voltage is within the tolerance limit range of the power management chip 2; or, in the case that some inrush surges are not enough to turn on the first protection module 3 and the second protection module 4, a part of the voltage can be shared by the energy attenuation circuit 5 to protect the power management chip 2.
For the above embodiment, in some cases, the charging interface module 1 and the power management chip 2 may be disposed on the same circuit board, in other cases, as shown in fig. 2, the charging circuit 100 may further include a first circuit board 6, a second circuit board 7, and a third circuit board 8, the charging interface module 1 may be electrically connected to the first circuit board 6, the first protection module 3 may be disposed on the first circuit board 6 and electrically connected to the charging interface module 1, the power management chip 2 may be disposed on the second circuit board 7, and the third circuit board 8 may be electrically connected to the first circuit board 6 and the second circuit board 7, so as to achieve conduction between the power management chip 2 and the charging interface module 1. And because this first protection module 3 arranges on first circuit board 6, be favorable to shortening the route when the surge that surges circulates to first protection module 3 to reduce the voltage drop that produces because the parasitic resistance that wire or circuit board arouse, arrange the condition on second circuit board 7 for first protection module 3, can reduce the voltage drop, thereby reduce the residual voltage that arrives at first protection module 3 and be not enough to cause first protection module 3 to open and exceed the condition that the tolerance limit of power management chip 2, the protection success rate of first protection module 3 has been promoted.
The energy attenuation circuit 5 may include a first energy attenuation circuit 51 and a second energy attenuation circuit 52, the first energy attenuation circuit 51 being disposed on the first circuit board 6 and being connected in parallel with the first protection module 3; the second energy attenuation circuit 52 is arranged on the second circuit board 7, and can be connected with the second protection module 4 arranged on the second circuit board 7 in parallel, so that the energy attenuation circuits 5 are respectively arranged on the first circuit board 6 and the second circuit board 7, and the problem that the electronic components on any one circuit board are compact in layout and easy to influence each other is solved. The energy attenuation circuit 5 may include a plurality of resistors, such as in the embodiment shown in fig. 2 of the present disclosure, the energy attenuation circuit 5 may include two resistors, one of which is disposed on the first circuit board 6 and the other of which is disposed on the second circuit board 7. Of course, in the embodiment of the present disclosure, only the energy attenuation circuit 5 includes two resistors connected in series is taken as an example for description, in other embodiments, the energy attenuation circuit 5 may also include three or more resistors connected in series, and the present disclosure does not limit this.
In the embodiment provided by the present disclosure, the energy attenuation circuit 5 is disposed on the first circuit board 6 and the second circuit board 7 for example, in other embodiments, the energy attenuation circuit 5 may also be disposed on the first circuit board 6 or the second circuit board 7, in which case the energy attenuation circuit 5 may include one or more resistors connected in series with each other, and the present disclosure does not limit this.
For the above embodiments, as shown in fig. 3, the charging circuit 100 may further include a battery 9, the battery 9 may include a battery core 91 and a battery protection board 92, the battery protection board 92 is connected with the battery core 91, the battery protection board 92 is electrically connected to the charging interface module 1, the first protection module 3 is connected in parallel with the battery protection board 92, and the first protection module 3 is closer to the charging interface module 1 in circuit connection with respect to the battery protection board 92, so that when the battery 9 is charged by external commercial power, the battery 9 may be surge-protected by the first protection module 3. The battery protection board 92 can also be connected with the power management chip 2, so as to supply power to the power management chip 2 by the battery 9.
Under the condition that the charging interface module 1 is respectively conducted with the battery 9 and the power management chip 2, and the battery 9 is conducted with the power management chip 2, if the charging interface module 1 is positioned at the external commercial power conduction, the battery 9 can be used for supplying power to the power management chip; under the condition that the charging interface module 1 is conducted with the external mains supply, the charging interface module 1 can be used for directly supplying power to the power management chip 2 and simultaneously charging the battery 9.
Based on the technical solution of the present disclosure, there is also provided an electronic device 200 as shown in fig. 4, where the electronic device 200 may include the charging circuit 100 described in any of the embodiments above. The electronic device 200 may include a mobile phone terminal, a tablet terminal, a notebook computer terminal, and a wearable smart terminal.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (10)
1. A charging circuit, comprising:
the charging interface module is used for transmitting a charging signal;
the power management chip is electrically connected to the charging interface module;
the first protection module is electrically connected with the output end of the charging interface module and the other end of the charging interface module in a grounded mode, the first protection module is connected with the power management chip in parallel, and the first protection module is used for being started when the charging signal is larger than a first preset threshold value so as to discharge the charging signal.
2. The charging circuit of claim 1, further comprising:
and the second protection module is electrically connected with one end of the power management chip, the other end of the second protection module is grounded, the second protection module is connected with the power management chip in parallel, and the second protection module is used for starting when the residual voltage signal of the discharged charging signal is greater than a second preset threshold value so as to discharge the residual voltage signal.
3. The charging circuit of claim 2, wherein the second protection module comprises a second transient diode.
4. The charging circuit of claim 1, further comprising:
the energy attenuation circuit is connected between the charging interface module and the power management chip in series and connected with the first protection module in parallel, and is used for attenuating the charging signal.
5. The charging circuit of claim 4, further comprising:
the first circuit board is electrically connected with the charging interface module, and the first protection module is arranged on the first circuit board;
the second circuit board is electrically connected with the power management chip;
the third circuit board is electrically connected with the first circuit board and the second circuit board so as to conduct the charging interface module and the power management chip;
the energy attenuation circuit board is arranged on the first circuit board and/or the second circuit board.
6. The charging circuit of claim 5, wherein the energy attenuation circuit comprises:
a first energy attenuation circuit disposed on the first circuit board and in parallel with the first protection module;
a second energy attenuation circuit disposed on the second circuit board.
7. The charging circuit of claim 4, wherein the energy attenuation circuit comprises a first resistor or a plurality of first resistors connected in series.
8. The charging circuit according to claim 1, further comprising a battery, wherein the battery comprises a battery core and a battery protection board connected to the battery core, the battery protection board is electrically connected to the charging interface module, and the first protection module is connected to the battery protection board in parallel.
9. The charging circuit of claim 1, wherein the first protection module comprises a first transient diode.
10. An electronic device, characterized in that it comprises a charging circuit according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220180454.1U CN216489870U (en) | 2022-01-21 | 2022-01-21 | Charging circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220180454.1U CN216489870U (en) | 2022-01-21 | 2022-01-21 | Charging circuit and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216489870U true CN216489870U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220180454.1U Active CN216489870U (en) | 2022-01-21 | 2022-01-21 | Charging circuit and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216489870U (en) |
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- 2022-01-21 CN CN202220180454.1U patent/CN216489870U/en active Active
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