CN217825284U - TWS Bluetooth headset charging circuit, charging bin and TWS Bluetooth headset device - Google Patents

Abstract

The utility model discloses a TWS Bluetooth earphone charging circuit, a charging compartment and a TWS Bluetooth earphone device, comprising: a charging terminal, a charging and discharging management module, a charging compartment battery module, a switch module, a boost chip, a one-way conductive element and an output terminal , the charging terminal is connected to the external power supply, the charging terminal is connected to the input terminal of the charging and discharging management module, the output terminal of the charging and discharging management module is connected to the input terminal of the charging compartment battery module, the charging terminal is connected to the control terminal of the switch module, and the output terminal of the charging compartment battery module Connect the input terminal of the switch module, the output terminal of the switch module is connected to the input terminal of the boost chip, the charging terminal is connected to the input terminal of the unidirectional conductive element, the output terminal of the unidirectional conductive element is connected to the input terminal of the boost chip, and the The output terminal is connected to the output terminal to realize the simultaneous charging of the TWS Bluetooth headset and the battery module of the charging compartment, which reduces the charging time and heat generation, making it more intelligent and optimizing the user experience.

Description

TWS Bluetooth headset charging circuit, charging case and TWS Bluetooth headset device

technical field

The utility model relates to the technical field of bluetooth earphones, in particular to a TWS bluetooth earphone charging circuit, a charging compartment and a TWS bluetooth earphone device.

Background technique

TWS Bluetooth headsets are favored by many consumers because of their small size, portability, ease of use, and no wire constraints. In order to achieve the characteristics of small size and portability, the product design must meet the characteristics of small appearance and low power consumption. In order to increase the battery life of the headset under the condition of small size and unchanged power consumption technology, it is necessary to carry the charging box by itself, so the charging box becomes the storage box and charger of the current TWS Bluetooth headset, between the charging box and the TWS Bluetooth headset They can communicate with each other, and can realize the functions of opening the cover, opening the cover, reconnecting, and power display. Since the PCB area of the charging compartment is basically less than 15 square centimeters, the discrete component charging scheme and the nonlinear scheme are not suitable for selection due to their large space occupation and high standby power consumption. Therefore, most charging compartments choose the linear charging IC solution.

However, the linear charging IC solution has the following problems. When the TWS Bluetooth headset is in the charging compartment, the external USB charging terminal first charges the battery in the charging compartment, and then the battery charges the TWS Bluetooth headset through the boost circuit. The charging time is long, and the charging chip The heat is severe, which makes the charging case and earphones hot, affecting the user experience.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, the utility model proposes a TWS bluetooth earphone charging circuit, a charging compartment and a TWS bluetooth earphone device, which can solve the problems of long charging time and serious heat generation.

The TWS Bluetooth earphone charging circuit according to the embodiment of the first aspect of the present invention includes: a charging terminal for connecting to an external power supply; a charging and discharging management module, the charging terminal is connected to the input end of the charging and discharging management module; a charging compartment battery Module, the output end of the charge and discharge management module is connected to the input end of the charging compartment battery module for charge and discharge management of the charging compartment battery module; the switch module, the charging terminal is connected to the control of the switch module The terminal is used to disconnect the switch module when the charging terminal is connected to an external power supply; the boost chip, the output terminal of the charging compartment battery module is connected to the input terminal of the switch module, and the output terminal of the switch module is connected to the The input end of the boost chip; the unidirectional conductive element, the charging terminal is connected to the input end of the unidirectional conductive element, the output end of the unidirectional conductive element is connected to the input end of the boost chip; the output terminal, the The output terminal of the boost chip is connected to the output terminal for connecting to the charging interface of the TWS Bluetooth headset.

The TWS Bluetooth earphone charging circuit according to the embodiment of the first aspect of the utility model has at least the following beneficial effects:

By setting a switch module between the input terminal of the boost chip and the output terminal of the battery module of the charging compartment, when the TWS Bluetooth headset is in the charging compartment and the charging terminal is connected to an external power supply, the switch module is disconnected, and the input terminal of the boost chip and the The output terminals of the charging compartment battery module are in a disconnected state, and the external power supply charges the TWS Bluetooth headset and the charging compartment battery module through the boost module and the charging and discharging management module respectively, so as to realize the simultaneous charging of the TWS Bluetooth headset and the charging compartment battery module, reducing the During the charging time, part of the current flowing from the charging terminal directly flows into the TWS Bluetooth headset through the boost chip, and the current flowing through the charging and discharging management module becomes smaller, reducing heat generation, making it more intelligent, and optimizing the user experience.

According to some embodiments of the present utility model, the one-way conductive element is a diode.

According to some embodiments of the present invention, the switch module includes a PMOS transistor.

According to some embodiments of the present invention, the G pole of the PMOS transistor is grounded through a resistor.

According to some embodiments of the present invention, the charging and discharging management module includes a charging chip.

According to some embodiments of the present utility model, the model of the boost chip is SS89.

The charging case according to the embodiment of the second aspect of the present invention includes the above-mentioned TWS Bluetooth earphone charging circuit.

According to the second embodiment of the utility model, the charging bin has at least the following beneficial effects:

By setting a switch module between the input terminal of the boost chip and the output terminal of the battery module of the charging compartment, when the TWS Bluetooth headset is in the charging compartment and the charging terminal is connected to an external power supply, the switch module is disconnected, and the input terminal of the boost chip and the The output terminals of the charging compartment battery module are in a disconnected state, and the external power supply charges the TWS Bluetooth headset and the charging compartment battery module through the boost module and the charging and discharging management module respectively, so as to realize the simultaneous charging of the TWS Bluetooth headset and the charging compartment battery module, reducing the During the charging time, part of the current flowing from the charging terminal directly flows into the TWS Bluetooth headset through the boost chip, and the current flowing through the charging and discharging management module becomes smaller, reducing heat generation, making it more intelligent, and optimizing the user experience.

The TWS Bluetooth headset device according to the embodiment of the third aspect of the present invention includes a TWS Bluetooth headset and the above-mentioned charging case.

The TWS Bluetooth headset device according to the embodiment of the third aspect of the present invention has at least the following beneficial effects:

By setting a switch module between the input terminal of the boost chip and the output terminal of the battery module of the charging compartment, when the TWS Bluetooth headset is in the charging compartment and the charging terminal is connected to an external power supply, the switch module is disconnected, and the input terminal of the boost chip and the The output terminals of the charging compartment battery module are in a disconnected state, and the external power supply charges the TWS Bluetooth headset and the charging compartment battery module through the boost module and the charging and discharging management module respectively, so as to realize the simultaneous charging of the TWS Bluetooth headset and the charging compartment battery module, reducing the During the charging time, part of the current flowing from the charging terminal directly flows into the TWS Bluetooth headset through the boost chip, and the current flowing through the charging and discharging management module becomes smaller, reducing heat generation, making it more intelligent, and optimizing the user experience.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described further, wherein:

Fig. 1 is the schematic diagram of circuit structure of a kind of embodiment of the utility model;

Figure number:

Charging terminal 100;

Charge and discharge management module 200;

Charging bin battery module 300;

switch module 400;

Boost chip 500.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that when it comes to orientation descriptions, for example, the orientation or positional relationship indicated by up, down, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and Simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present utility model, a plurality refers to more than two. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

In the description of the utility model, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above-mentioned words in the utility model in combination with the specific content of the technical solution .

Referring to Fig. 1, the TWS Bluetooth headset charging circuit of the first embodiment of the utility model includes: charging terminal 100, charging and discharging management module 200, charging compartment battery module 300, switch module 400, boost chip 500, one-way guide The charging terminal 100 is connected to an external power supply, and the charging terminal 100 is connected to the input terminal of the charging and discharging management module 200 . The output terminal of the charge and discharge management module 200 is connected to the input terminal of the battery module 300 of the charging compartment to manage the charging and discharging of the battery module 300 of the charging compartment. The charging terminal 100 is connected to the control terminal of the switch module 400 , and the switch module 400 can be disconnected when the charging terminal 100 is connected to an external power source. The output terminal of the battery module 300 of the charging compartment is connected to the input terminal of the switch module 400, the output terminal of the switch module 400 is connected to the input terminal of the boost chip 500, the charging terminal 100 is connected to the input terminal of the boost chip 500 through the diode D5 and the inductor L2, and the boost The output terminal of the pressure chip 500 is connected to the output terminal, and the output terminal is connected to the charging interface of the TWS Bluetooth headset. The model of the boost chip 500 is SS89. It is also possible to use components such as thyristors to replace the diode D5. The battery module 300 of the charging compartment is a rechargeable lithium battery, which can also be replaced by other rechargeable batteries.

By setting the switch module 400 between the input terminal of the boost chip 500 and the output terminal of the battery module 300 of the charging compartment, when the TWS Bluetooth headset is in the charging compartment and the charging terminal 100 is connected to an external power source, the switch module 400 is disconnected, and the booster The input terminal of the chip 500 and the output terminal of the charging compartment battery module 300 are in an open circuit state, and the external power supply charges the TWS Bluetooth headset and the charging compartment battery module 300 through the boost module and the charging and discharging management module 200 respectively, realizing the TWS Bluetooth headset and the charging compartment battery module 300. The battery module 300 of the charging compartment is charged at the same time, which reduces the charging time. Part of the current flowing in from the charging terminal 100 directly flows into the TWS Bluetooth headset through the boost chip 500, and the current flowing through the charging and discharging management module 200 becomes smaller, reducing heat generation and more Intelligent, optimized user experience.

Referring to FIG. 1, the switch module 400 includes a PMOS transistor Q8, the G pole of the PMOS transistor Q8 is connected to the charging terminal 100, the D pole of the PMOS transistor Q8 is connected to the output terminal of the battery module 300 of the charging compartment, and the S pole of the PMOS transistor Q8 is connected to the charging terminal 100 by the inductor L2. Connect the LX pin of the boost chip 500, and the G pole of the PMOS transistor Q8 is grounded through the resistor R21. When the charging terminal 100 is connected to an external power supply, the G pole of the PMOS transistor Q8 is set to a high level, and the PMOS transistor Q8 is turned off. The switch module 400 can also be replaced by components such as NMOS tubes and relays. The diode D5, the switch module 400 and the resistor R21 form a charging bypass to realize simultaneous charging of the TWS Bluetooth headset and the battery module 300 of the charging compartment.

Referring to FIG. 1, the charging and discharging management module 200 includes a charging chip, which is an MCU integrated with charging and discharging management functions. The VIN pin of the MCU is connected to the charging terminal 100, and the BAT pin of the MCU is connected to the input of the battery module 300 of the charging compartment. terminal, charge and discharge management of the battery module 300 in the charging compartment, and the GIPO pin on the MCU can control other circuit logic functions. volume. It is also possible to use an MCU that does not integrate charge and discharge management functions and a conventional charging chip instead of an MCU that integrates charge and discharge management functions. The output terminal of the MCU is connected to the enable terminal of the boost chip 500, and the MUC can control the boost chip 500 to not work and not charge the TWS Bluetooth headset through the enable terminal of the boost chip 500.

Referring to Fig. 1 , the charging compartment of the second aspect embodiment of the present invention includes: including the above-mentioned TWS Bluetooth earphone charging circuit, by setting the charging compartment between the input end of the boost chip 500 and the output end of the charging compartment battery module 300 The switch module 400, when the TWS Bluetooth headset is in the charging compartment and the charging terminal 100 is connected to an external power source, the switch module 400 is disconnected, and the input terminal of the boost chip 500 and the output terminal of the charging compartment battery module 300 are in a disconnected state. The power supply charges the TWS Bluetooth headset and the charging compartment battery module 300 through the boost module and the charging and discharging management module 200 respectively, so that the TWS Bluetooth headset and the charging compartment battery module 300 can be charged at the same time, reducing the charging time, and the current flowing from the charging terminal 100, Part of it flows directly into the TWS Bluetooth headset through the boost chip 500, and the current flowing through the charging and discharging management module 200 becomes smaller, reducing heat generation, making it more intelligent, and optimizing user experience.

There is a Hall switch on the charging compartment. The output terminal of the Hall switch is connected to the input terminal of the MCU. Open the cover of the charging compartment. The Hall switch recognizes the action of opening the cover and feeds back to the MCU. The MUC control boost chip 500 does not work. The TWS Bluetooth headset is charged, and the TWS Bluetooth headset is automatically turned on when it is not charged, and the function of opening the cover is realized.

Referring to Fig. 1, the TWS Bluetooth earphone device of the third aspect embodiment of the present utility model includes: including the TWS Bluetooth earphone and the above-mentioned charging compartment, through the input end of the boost chip 500 and the output end of the charging compartment battery module 300 A switch module 400 is arranged between them. When the TWS Bluetooth headset is in the charging compartment and the charging terminal 100 is connected to an external power source, the switch module 400 is disconnected, and the input terminal of the boost chip 500 and the output terminal of the battery module 300 of the charging compartment are disconnected. state, the external power supply charges the TWS Bluetooth headset and the battery module 300 of the charging compartment through the boost module and the charge and discharge management module 200 respectively, so that the TWS Bluetooth headset and the battery module 300 of the charging compartment can be charged at the same time, which reduces the charging time and flows from the charging terminal 100 Part of the current flows directly into the TWS Bluetooth headset through the boost chip 500, and the current flowing through the charge and discharge management module 200 becomes smaller, reducing heat generation, making it more intelligent, and optimizing user experience.

The above embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned embodiments. Make various changes.

Claims (8)

1. TWS bluetooth headset charging circuit, including:

   a charging terminal (100) for connecting an external power supply;

   the charging and discharging management module (200), the charging terminal (100) is connected with the input end of the charging and discharging management module (200);

   the output end of the charging and discharging management module (200) is connected with the input end of the charging bin battery module (300) so as to be used for charging and discharging management on the charging bin battery module (300);

   a switch module (400), the charging terminal (100) being connected to a control terminal of the switch module (400) for disconnecting the switch module (400) when the charging terminal (100) is connected to an external power source;

   the output end of the charging bin battery module (300) is connected with the input end of the switch module (400), and the output end of the switch module (400) is connected with the input end of the boosting chip (500);

   the charging terminal (100) is connected with the input end of the unidirectional conductive element, and the output end of the unidirectional conductive element is connected with the input end of the boosting chip (500);

   the output terminal is connected to the output terminal of chip (500) steps up and is used for connecting the interface that charges of TWS bluetooth headset.
2. 2. The TWS Bluetooth headset charging circuit of claim 1, wherein: the unidirectional conductive element is a diode.
3. 3. The TWS Bluetooth headset charging circuit of claim 1, wherein: the switch module (400) comprises a PMOS tube.
4. 4. The TWS Bluetooth headset charging circuit of claim 3, wherein: and the G pole of the PMOS tube is grounded through a resistor.
5. 5. The TWS Bluetooth headset charging circuit of claim 1, wherein: the charging and discharging management module (200) comprises a charging chip.
6. 6. The TWS Bluetooth headset charging circuit of claim 1, wherein: the type of the boost chip (500) is SS89.
7. 7. Storehouse of charging, its characterized in that: comprising a TWS bluetooth headset charging circuit according to any of the preceding claims 1 to 6.
8. The TWS bluetooth headset device, its characterized in that: comprising a TWS bluetooth headset and a charging chamber according to claim 7 above.

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