CN214205054U - Charging circuit and electronic device - Google Patents
Charging circuit and electronic device Download PDFInfo
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- CN214205054U CN214205054U CN202120329118.4U CN202120329118U CN214205054U CN 214205054 U CN214205054 U CN 214205054U CN 202120329118 U CN202120329118 U CN 202120329118U CN 214205054 U CN214205054 U CN 214205054U
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Abstract
The application discloses charging circuit relates to communication technology. The circuit includes: the first integrated circuit is used for supplying power to the terminal system, the input end of the first integrated circuit is connected with the output end of the power supply, and the output end of the first integrated circuit is connected with the first charging interface; the first charging interface is used for supplying power to the terminal system; the input end of the second integrated circuit is connected with the output end of the power supply, and the output end of the second integrated circuit is connected with the second charging interface; the second charging interface is used for charging the external equipment. The charging circuit is used for simultaneously supplying power to the terminal system and charging the external equipment, different integrated circuits are respectively used, and the current limiting values of the terminal system and the external equipment are respectively managed by the different integrated circuits. The charging circuit of the embodiment of the application can realize the functions of the terminal system and the two modules of the external equipment simultaneously, does not interfere with each other, and ensures the simultaneous and stable realization of the two functions.
Description
Technical Field
The application belongs to the technical field of communication, and particularly relates to a charging circuit and electronic equipment.
Background
With the development of battery technology and the electronic industry, the battery capacity of electronic equipment is larger and larger, and some of the battery capacity even exceeds the capacity of a mobile power supply. The reverse charging output current supported by the current electronic devices is increasing. In the related technology, when the terminal system is powered and the external equipment is reversely charged, one power supply circuit is shared, and a switch tube in the power supply circuit is used for managing the current limiting values of two functional modules of the terminal system and the external equipment. The two functions interfere with each other when being realized at the same time, and both the two functions can not be normally realized.
SUMMERY OF THE UTILITY MODEL
The application aims at providing a charging circuit and electronic equipment, and the problem that the two functions cannot be normally realized due to mutual interference when the two functions of supplying power to a terminal system and external equipment are simultaneously realized is at least solved.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging circuit, including:
the first integrated circuit 1 is used for supplying power to a terminal system, the input end of the first integrated circuit 1 is connected with the output end of a power supply, and the output end of the first integrated circuit 1 is connected with a first charging interface; the first charging interface is used for supplying power to the terminal system;
the second integrated circuit 2 is used for charging the external equipment, the input end of the second integrated circuit 2 is connected with the output end of the power supply, and the output end of the second integrated circuit is connected with the second charging interface; the second charging interface is used for charging the external equipment;
the first integrated circuit 1 and the second integrated circuit 2 operate independently, and the charging circuit can simultaneously supply power to a terminal system and external equipment.
In a second aspect, an embodiment of the present application provides an electronic device, including: a charging circuit as claimed in the first aspect.
In the embodiment of the application, when the charging circuit simultaneously supplies power to the terminal system and reversely charges the external equipment, different integrated circuits are respectively used, and the current limiting values of the two functional modules of the terminal system and the external equipment are respectively managed by the different integrated circuits. Therefore, by using the charging circuit of the embodiment of the application, when the functions of the terminal system and the two modules of the external equipment are simultaneously realized, no interference is generated between the two modules, and the simultaneous and stable realization of the two functions is ensured.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a charging circuit in the related art.
FIG. 2 is a schematic diagram of a charging circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of a charging circuit according to another embodiment of the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The features of the terms first and second in the description and in the claims of the present application may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
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.
In describing the embodiments of the present application, the reverse charging OTG technology is first described as follows:
the reverse charging technology OTG charges the external device through the electronic device itself.
In the structure of the OTG circuit in the reverse charging technology in the related technology, two functional modules of a terminal system and external equipment are supplied with power through an integrated circuit, and the current of the terminal system and the external equipment is limited through a switch tube.
As shown in fig. 1, when only the terminal system SYS is powered, the current reaches the terminal system SYS through the switching tube D1; when power is supplied to the terminal system and the external equipment at the same time, the current is shunted after passing through the switch tube D1, one part of the current reaches the terminal system, and the other part of the current reaches the external equipment through the field effect tubes D2, D3 and D4.
If the terminal system SYS is supplied with power alone, the current I is limited using the switching tube D1OCPThat is to say if the system is supplied with current ISYS1Is greater than IOCPIn the meantime, the switch tube D1 is turned off to prevent the abnormal condition of the terminal system SYS from causing a large currentAnd (4) scene.
If the external device is reversely charged OTG while the power is supplied to the terminal system SYS, the reverse charging current also passes through the switching tube D1. The current passing through the switch tube D1 is divided into a reverse charging current IOTGAnd a current I for supplying the terminal systemSYS2The distribution of the two-part current depends on the reverse charging OTG and the load of the terminal system SYS. The currents of the two parts are added up: i isOTG+ISYS2＞IOCPThe switch tube D1 is turned off.
Thus, ISYS2<ISYS1That is, compared with the case of supplying power to the terminal system SYS only, the power supply to the terminal system SYS and the reverse charging OTG of the external device at the same time limit the current of the terminal system SYS, which may cause the terminal device to be erroneously reported and shut down.
The following describes a charging circuit and an electronic device according to an embodiment of the present application with reference to fig. 2 to 3.
The application provides a charging circuit, includes:
the first integrated circuit 1 is used for supplying power to a terminal system, the input end of the first integrated circuit 1 is connected with the output end of a power supply, and the output end of the first integrated circuit 1 is connected with a first charging interface; the first charging interface is used for supplying power to the terminal system;
the second integrated circuit 2 is used for charging the external equipment, the input end of the second integrated circuit 2 is connected with the output end of the power supply, and the output end of the second integrated circuit is connected with the second charging interface; the second charging interface is used for charging the external equipment;
the first integrated circuit 1 and the second integrated circuit 2 operate independently, and the charging circuit can simultaneously supply power to a terminal system and external equipment.
As shown in fig. 2, the input end of the first integrated circuit 1 is connected with the storage battery, and the output end is connected with the charging interface of the terminal system SYS, and is used for supplying power to the terminal system SYS;
the input end of the first integrated circuit 2 is connected with the output end of the storage battery, and the output end of the first integrated circuit is connected with a charging interface of the external equipment and used for supplying power to the external equipment.
It should be noted that, the second integrated circuit further includes a micro control unit, and before charging the external device, the micro control unit performs charging handshake to obtain charging data of the external device, and charges the external device according to the charging data.
Optionally, the charging data includes a current limit value and a voltage limit value of the external device.
Optionally, in another embodiment of the present application, as shown in fig. 3, the charging circuit includes:
the first integrated circuit 1 is used for supplying power to a terminal system, the input end of the first integrated circuit 1 is connected with the output end of a power supply, and the output end of the first integrated circuit 1 is connected with a first charging interface and a second charging interface; the first charging interface is used for supplying power to the terminal system;
the second integrated circuit 2 is used for charging the external equipment, the input end of the second integrated circuit 2 is connected with the output end of the power supply, and the output end of the second integrated circuit is connected with the second charging interface; the second charging interface is used for charging the external equipment;
the first integrated circuit 1 and the second integrated circuit 2 operate independently, and the charging circuit can simultaneously supply power to a terminal system and external equipment.
Optionally, the first integrated circuit further includes a micro control unit, and before charging the external device, the micro control unit performs a charging handshake to obtain charging data of the external device, and controls the second integrated circuit to charge the external device according to the charging data.
Optionally, the charging data includes a current limit value and a voltage limit value of the external device.
In the embodiment of the application, when the charging circuit simultaneously supplies power to the terminal system and reversely charges the external equipment, different integrated circuits are respectively used, and the current limiting values of the two functional modules of the terminal system and the external equipment are respectively managed by the different integrated circuits. Therefore, by using the charging circuit of the embodiment of the application, when the functions of the terminal system and the two modules of the external equipment are simultaneously realized, no interference is generated between the two modules, and the simultaneous and stable realization of the two functions is ensured.
Optionally, the first integrated circuit 1 includes a first switch Q1, a source of the first switch Q1 is connected to a power supply, and a drain of the first switch Q1 is connected to the first charging interface;
the second integrated circuit 2 comprises a second switch tube Q2, a first insulated gate bipolar transistor Q3 and a booster circuit 3; the source electrode of the second switch tube Q2 is connected with a power supply, and the drain electrode is connected with the drain electrode of the first insulated gate bipolar transistor Q3 through the booster circuit 3; the source of the first insulated gate bipolar transistor Q3 is connected with the second charging interface.
As shown in fig. 2, the first integrated circuit 1 includes: a first switching tube Q1; the second integrated circuit 2 includes a second switch Q2, a first igbt Q3, and a booster circuit 3.
Configuring the overcurrent value of the second switching tube Q2 according to the current limiting value of the external equipment; according to the voltage limiting value of the external equipment, the voltage boosting circuit 3 adjusts the voltage and performs anti-reverse charging control through the first insulated gate bipolar transistor Q3.
The charging circuit of the embodiment of the application supplies power to the terminal system and the external equipment through different integrated circuits respectively, and utilizes different switch tubes to limit the current of the terminal system and the external equipment respectively. Through the charging circuit of the embodiment of the application, when the terminal system and the external equipment are powered simultaneously, mutual interference is avoided.
Optionally, when the charging circuit supplies power to a terminal system, the first switching tube Q1 is turned on, and the second switching tube Q2 is turned off;
when the charging circuit charges the terminal system and the external equipment at the same time, the first switch tube Q1 and the second switch tube Q2 are both switched on.
As shown in fig. 2, the direction of the arrow is the current direction. When the charging circuit only supplies power to the terminal system, the first switch tube Q1 is switched on, the second switch tube Q2 is switched off, and the current reaches the terminal system through the first switch tube Q1. When the charging circuit supplies power to the terminal system and the external equipment at the same time, the first switch tube Q1 and the second switch tube Q2 are both switched on, and the current is divided into two parts. One part reaches a terminal system through the first switch tube Q1, and the other part reaches an external device through the second switch tube Q2, the booster circuit 3 and the first insulated gate bipolar transistor Q3 in sequence.
The charging circuit of the embodiment of the application respectively supplies power to the terminal system and the external equipment through the two integrated circuits, and realizes different functions of the charging circuit by controlling the connection or disconnection of different switch tubes in different integrated circuits, and ensures the stability of the realization process of various functions. Therefore, through the scheme of the embodiment of the application, the circuit for supplying power to the terminal system and the external equipment can be separated, different circuits are used for different functions, and the mutual interference generated when one circuit is shared to realize different functions is prevented.
Optionally, the overcurrent protection current value of the first switching tube Q1 is the current limiting value of the terminal system.
As shown in fig. 2, when the charging circuit only supplies power to the terminal system, the first switch Q1 is turned on, the second switch Q2 is turned on, and current reaches the terminal system only through the first switch Q1. Therefore, the current of the terminal system is limited by the first switching tube Q1.
The charging circuit of this application embodiment, to terminal system's supply circuit exclusive use a switch tube carry out the current limitation, distinguish with other supply circuit, avoid the interact in the use. Through the scheme of the embodiment of the application, when the charging circuit simultaneously realizes multiple functions, normal power supply of the terminal system can be ensured.
Optionally, the overcurrent protection current value of the second switching tube Q2 is the current limiting value of the external device.
As shown in fig. 2, when the charging circuit charges the terminal system and the external device at the same time, the part of current for supplying power to the external device reaches the external device through the second switch Q2, and the external device is current-limited through the second switch Q2.
The charging circuit of this application embodiment, to external device's supply circuit exclusive use a switch tube and carry out the current restriction, distinguish with other supply circuit, avoid charging circuit to carry out the current restriction to external device and a switch tube of sharing when terminal system supplies power simultaneously, and then external device and terminal system current shunting and lead to reaching terminal system and external device's electric current and hang down and the unexpected shutdown of the terminal system that leads to excessively.
Optionally, the charging circuit further comprises:
and one end of the first inductor L2 is connected to the drain of the first switching tube Q1, and the other end of the first inductor L2 is connected to the second charging interface.
As shown in fig. 2, a first inductor L1 is disposed between the first switch Q1 and the second charging interface. The filter is used for ensuring the stability of current, filtering over-high or over-low current and leading the current to stably reach a terminal system.
In the embodiment of the application, the inductor is arranged in front of the terminal system, so that the stability of the current entering the terminal system is ensured, and the accidental shutdown of the terminal caused by the fact that the overhigh or overlow current reaches the terminal system is avoided.
Optionally, the charging circuit further comprises:
and one end of the first capacitor C1 is connected with the first charging interface, and the other end of the first capacitor C1 is grounded.
As shown in fig. 2, one end of the first capacitor C1 is disposed between the first inductor L1 and the first charging interface, and the other end is grounded. The filter is used for ensuring the stability of voltage, filtering over-high or over-low voltage and leading the voltage to stably reach a terminal system.
In the embodiment of the application, the capacitor is arranged in front of the terminal system, so that the stability of the voltage entering the terminal system is ensured, and the accidental shutdown of the terminal caused by the fact that the overhigh or overlow voltage reaches the terminal system is avoided.
Optionally, the boost circuit comprises:
a second insulated gate bipolar transistor Q4, a third insulated gate bipolar transistor Q5, and a second inductor L2;
the source electrode of the second insulated gate bipolar transistor Q4 is grounded, and the drain electrode of the second insulated gate bipolar transistor Q4 is connected with the drain electrode of the second switch tube Q2 and the source electrode of the third insulated gate bipolar transistor Q5; the drain of the third insulated gate bipolar transistor Q5 is connected with the drain of the first insulated gate bipolar transistor Q3;
one end of the second inductor L2 is connected to the drain of the second switch Q2, and the other end is connected to the drain of the second igbt Q4 and the source of the third igbt Q5.
As shown in fig. 2, the booster circuit 3 includes: the second inductor L2 is connected with the drain of the second switch tube Q2 at one end and the drain of the second insulated gate bipolar transistor Q4 and the source of the third insulated gate bipolar transistor Q5 at the other end; and
the second insulated gate bipolar transistor Q4 is connected with the source electrode and the drain electrode of the second switch tube Q2 and the source electrode of the third insulated gate bipolar transistor Q5; and
the third insulated gate bipolar transistor with the drain connected to the drain of the first insulated gate bipolar transistor Q3.
Optionally, the voltage boost circuit 3 adjusts the voltage reaching the external device through the control of the external control unit according to the charging parameter, so that the voltage reaching the external device can meet the requirement of the external device.
The charging circuit of this application embodiment adjusts the voltage of second integrated circuit through setting up boost circuit, has guaranteed that the voltage that reachs external device can satisfy external device's demand.
Optionally, the charging circuit further comprises:
and one end of the second capacitor C2 is connected to the drain of the second switching tube Q2, and the other end of the second capacitor C2 is grounded.
As shown in fig. 2, one end of the second capacitor C2 is disposed between the second inductor L2 and the drain of the second switch Q2, and the other end is grounded. The filter is used for ensuring the stability of voltage, filtering over-high or over-low voltage and enabling the voltage to stably reach external equipment.
In the embodiment of the application, the capacitor is arranged before the external equipment, so that the stability of the voltage entering the external equipment is ensured, and the situation that the external equipment is damaged due to the fact that the overhigh or overlow voltage reaches the external equipment is avoided.
As shown in fig. 2, when the charging circuit of the present application simultaneously supplies power to the terminal system and the external device. The path of the power supply to the terminal system SYS is: the battery, the first switching tube Q1 and the terminal system SYS are connected, current reaches the terminal system SYS only through the first switching tube Q1, the overcurrent protection current of the first switching tube Q1 is equal to the current limiting value of the terminal system SYS, other interference is avoided, and normal operation of the terminal system can be guaranteed; the power supply path to the external equipment is as follows: the battery, the second switch tube Q2, the booster circuit 3, the first insulated gate bipolar transistor Q3 and the external device, the overcurrent protection current of the second switch tube Q2 is equal to the current limiting value of the external device, interference on power supply of the terminal system SYS is avoided, the current limiting of the terminal system SYS is not influenced while the external device is powered, and normal operation of the terminal system can be guaranteed.
An embodiment of the present application further provides an electronic device, including: a charging circuit as described above.
In the embodiment of the application, when the charging circuit simultaneously supplies power to the terminal system and reversely charges the external equipment, different integrated circuits are respectively used, and the current limiting values of the two functional modules of the terminal system and the external equipment are respectively managed by the different integrated circuits. Therefore, by using the charging circuit of the embodiment of the application, when the functions of the terminal system and the two modules of the external equipment are simultaneously realized, no interference is generated between the two modules, and the simultaneous and stable realization of the two functions is ensured.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A charging circuit, comprising:
the first integrated circuit is used for supplying power to the terminal system, the input end of the first integrated circuit is connected with the output end of the power supply, and the output end of the first integrated circuit is connected with the first charging interface; the first charging interface is used for supplying power to the terminal system;
the input end of the second integrated circuit is connected with the output end of the power supply, and the output end of the second integrated circuit is connected with the second charging interface; the second charging interface is used for charging the external equipment;
the first integrated circuit and the second integrated circuit operate independently, and the charging circuit can simultaneously supply power to the terminal system and the external equipment.
2. The charging circuit of claim 1, wherein the first integrated circuit comprises a first switch tube, a source of the first switch tube is connected to a power supply, and a drain of the first switch tube is connected to the first charging interface;
the second integrated circuit comprises a second switch tube, a first insulated gate bipolar transistor and a booster circuit; the source electrode of the second switch tube is connected with a power supply, and the drain electrode of the second switch tube is connected with the drain electrode of the first insulated gate bipolar transistor through the booster circuit; and the source electrode of the first insulated gate bipolar transistor is connected with the second charging interface.
3. The charging circuit of claim 2, wherein when the charging circuit supplies power to a terminal system, the first switch tube is turned on, and the second switch tube is turned off;
when the charging circuit charges an external system terminal and a connecting device at the same time, the first switch tube and the second switch tube are both switched on.
4. The charging circuit of claim 2, wherein the overcurrent protection current value of the first switching tube is a current limiting value of the terminal system.
5. The charging circuit of claim 2, wherein the overcurrent protection current value of the second switching tube is a current limiting value of the external device.
6. The charging circuit of claim 2, further comprising:
and one end of the first inductor is connected with the drain electrode of the first switching tube, and the other end of the first inductor is connected with the second charging interface.
7. The charging circuit of claim 1, further comprising:
and one end of the first capacitor is connected with the first charging interface, and the other end of the first capacitor is grounded.
8. The charging circuit of claim 2, wherein the boost circuit comprises:
the second insulated gate bipolar transistor, the third insulated gate bipolar transistor and the second inductor;
the source electrode of the second insulated gate bipolar transistor is grounded, and the drain electrode of the second insulated gate bipolar transistor is connected with the drain electrode of the second switch tube and the source electrode of the third insulated gate bipolar transistor; the drain electrode of the third insulated gate bipolar transistor is connected with the drain electrode of the first insulated gate bipolar transistor;
one end of the second inductor is connected with the drain electrode of the second switch tube, and the other end of the second inductor is connected with the drain electrode of the second insulated gate bipolar transistor and the source electrode of the third insulated gate bipolar transistor.
9. The charging circuit of claim 8, further comprising:
and one end of the second capacitor is connected with the drain electrode of the second switching tube, and the other end of the second capacitor is grounded.
10. An electronic device, comprising: a charging circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120329118.4U CN214205054U (en) | 2021-02-04 | 2021-02-04 | Charging circuit and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120329118.4U CN214205054U (en) | 2021-02-04 | 2021-02-04 | Charging circuit and electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN214205054U true CN214205054U (en) | 2021-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120329118.4U Active CN214205054U (en) | 2021-02-04 | 2021-02-04 | Charging circuit and electronic device |
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| CN (1) | CN214205054U (en) |
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2021
- 2021-02-04 CN CN202120329118.4U patent/CN214205054U/en active Active
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