CN211405531U - Charging box - Google Patents
Charging box Download PDFInfo
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- CN211405531U CN211405531U CN201922448367.0U CN201922448367U CN211405531U CN 211405531 U CN211405531 U CN 211405531U CN 201922448367 U CN201922448367 U CN 201922448367U CN 211405531 U CN211405531 U CN 211405531U
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Abstract
The utility model discloses a charging box, which relates to the field of electronic products and comprises a charging interface, an earphone charging end, a main control chip, a power management circuit and a switching circuit; the power management circuit is electrically connected with the charging interface, the main control chip and the battery respectively; wherein switching circuit charges interface and earphone and charges the end electricity with main control chip, battery, respectively and is connected, and main control chip enables switching circuit, switches on battery and earphone and charges the end, or, switches on the interface that charges and earphone and charges the end. When the charging interface is externally connected with a power supply, the charging signal is simultaneously transmitted to the power supply management circuit and the switching circuit, and the main control chip controls the switching circuit to conduct the charging interface and the earphone charging end so as to charge the earphone. Because the battery and the earphone are not associated, the battery can be charged with high efficiency; when the charging interface is not externally connected with a power supply, the switching circuit switches the charging end of the earphone to be conducted with the battery, and the earphone is charged by the battery. It is visible, the utility model discloses a box charge efficiency that charges is high, and charge time is few.
Description
Technical Field
The utility model relates to an electronic product technical field especially relates to a charging box.
Background
The charging box for charging the Bluetooth headset generally comprises a charging interface and a power management circuit which are electrically connected, and the output end of the power management circuit is respectively electrically connected with a battery and a charging end of the headset. When the battery and the Bluetooth headset are not powered, the charging interface is externally connected with a power supply, the power supply management circuit divides charging current into two paths, one path of charging current flows to the battery to charge the battery, and the other path of charging current flows to the charging end of the headset to charge the headset. The charging current is usually 450mA, and when there is no earphone, the charging current of 450mA flows into the battery, and when there is an earphone, the current is preferentially supplied to the earphone. Assuming that the charging current flowing to the both earphones is 160mA, the charging current flowing into the battery is 290mA, which reduces the charging efficiency and the charging time is long.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: provided is a charging box, which has high battery charging efficiency and reduced charging time.
In order to solve the technical problem, the technical scheme of the utility model is that:
a charging box comprises a charging interface, an earphone charging end, a main control chip, a power management circuit for charging a battery and a switching circuit for charging an earphone; the input end of the power management circuit is electrically connected with the charging interface, the communication end of the power management circuit is electrically connected with the main control chip, and the output end of the power management circuit is electrically connected with the battery; the switching circuit is respectively electrically connected with the main control chip, the battery, the charging interface and the earphone charging end, and the main control chip enables the switching circuit to conduct the battery and the earphone charging end or conduct the charging interface and the earphone charging end.
Preferably, the charging interface is externally connected with a power supply, and the switching circuit conducts the charging interface and the earphone charging end; the charging interface is not externally connected with a power supply, and the switching circuit is used for conducting the battery and the earphone charging end.
Preferably, the switching circuit is a switch circuit, a first input end of the switch circuit is electrically connected with the battery, a second input end of the switch circuit is electrically connected with the charging interface, an enabling end of the switch circuit is electrically connected with the main control chip, and an output end of the switch circuit is electrically connected with the charging end of the earphone.
Preferably, the switching circuit includes an analog switch.
Preferably, the switching circuit is electrically connected with the earphone charging end through a charging circuit, the input end of the charging circuit is electrically connected with the output end of the switching circuit, the output end of the charging circuit is electrically connected with the earphone charging end, and the enabling end of the charging circuit is electrically connected with the main control chip.
Preferably, the charging interface is a TYPE _ C interface.
Preferably, the charging circuit is electrically connected to the first input terminal of the switching circuit through a first filter circuit.
Preferably, the charging circuit is electrically connected to the output end of the short circuit of the switch through a first filter circuit.
Preferably, the charging circuit is electrically connected to the charging terminal of the earphone through a second filter circuit.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
the charging box comprises a charging interface, an earphone charging end, a main control chip, a power management circuit for charging the battery and a switching circuit for charging the earphone; the input end of the power management circuit is electrically connected with the charging interface, the communication end is electrically connected with the main control chip, and the output end is electrically connected with the battery; the switching circuit is respectively electrically connected with the main control chip, the battery, the charging interface and the earphone charging end, and the main control chip is used for enabling the switching circuit to conduct the battery and the earphone charging end or conduct the charging interface and the earphone charging end. When the earphone is placed in the charging box for charging, when the charging interface is connected with an external power supply, the charging signal is transmitted to the power supply management circuit and the switching circuit at the same time, the main control chip controls the power supply management circuit to charge the battery, and controls the switching circuit to conduct the charging interface and the earphone charging end, so that the charging signal is transmitted to the earphone through the switching circuit to charge the earphone. Because the charging between the battery and the earphone is not related, the charging efficiency of the battery is high, and the charging time is reduced; when the charging interface is not externally connected with a power supply, the switching circuit switches on the charging end of the earphone and the battery, the earphone is charged by the battery, and the earphone is normally used. It is visible, the utility model discloses a box charges, charge efficiency is high, and charge time is few, and simple structure, easy realization.
The switching circuit is a switching circuit, a first input end of the switching circuit is electrically connected with the battery, a second input end of the switching circuit is electrically connected with the charging interface, an enabling end of the switching circuit is electrically connected with the main control chip, and an output end of the switching circuit is electrically connected with a charging end of the earphone; simple structure and easy realization.
Drawings
Fig. 1 is a schematic block diagram of the charging box of the present invention;
fig. 2 is a circuit diagram of a charging circuit according to the present invention;
fig. 3 is a circuit diagram of the charging box of the present invention;
in the figure: 1-a first filter circuit, 2-a second filter circuit, U1-a main control chip, U2-a power management chip, U3-an analog switch and U4-a charging chip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 to 3, a charging box includes a charging interface, an earphone charging terminal, a main control chip, a power management circuit for charging a battery, and a switching circuit for charging an earphone; the input end of the power management circuit is electrically connected with the charging interface, the communication end of the power management circuit is electrically connected with the main control chip, and the output end of the power management circuit is electrically connected with the battery; the switching circuit is respectively connected with the main control chip, the battery, the charging interface and the earphone charging end, and the main control chip is used for enabling the switching circuit to conduct the battery and the earphone charging end or conduct the charging interface and the earphone charging end.
In this example: the charging interface is preferably a TYPE _ C interface, and when the TYPE _ C interface is externally connected with a power supply, the switching circuit conducts the charging interface and the earphone charging end; when the TYPE _ C interface is not connected with an external power supply, the switching circuit switches on the battery and the earphone charging end. The main control chip can use a single chip, preferably an STM32 series single chip, and the power management circuit comprises a power management chip, preferably an MP2662 chip.
The earphone is placed in the charging box of the utility model for charging, when the battery is charged, the main control chip U1 controls the switching circuit to conduct the charging end of the earphone and the battery, and the earphone is charged by the battery; when the battery does not have the electricity, TYPE _ C interface external power supply, main control chip U1 control switching circuit switches on earphone charging end and TYPE _ C interface this moment, makes charging signal transmit to earphone charging end through switching circuit, charges for the earphone. Meanwhile, the TYPE _ C interface transmits a charging signal to the power management circuit, and the main control chip U1 controls the power management circuit to charge the battery. Therefore, the battery and the earphone are not associated, the battery charging efficiency is high, and the charging time is reduced.
As shown in fig. 3, the specific connection relationship of the power management chip U2 is: the communication end of power management chip U2 includes SDA pin and SCL pin, the SDA pin is connected with main control chip U1's port PB1, the SCL pin is connected with main control chip U1's port PB2, input pin IN is connected with TYPE _ C interface electricity, insert charging signal TYPE _ C _ VBUS, output SYS is connected with the battery electricity, this output SYS transmits charging signal VBAT and charges for the battery, earthing terminal GND ground connection GND.
As shown IN fig. 3, the switching circuit is a switching circuit, the switching circuit includes an analog switch, preferably a WAS4729QB-10-TR analog switch, a first input terminal NC1 of the analog switch U3 is electrically connected to the battery, i.e., a charging signal VSYS _ IN output by the battery is connected to the first input terminal NC1, a second input terminal NO1 is electrically connected to a TYPE _ C interface, i.e., a charging signal TYPE _ C _ VBUS transmitted by the TYPE _ C interface is connected to the second input terminal NO1, an enable terminal IN1 of the analog switch U3 is electrically connected to a port PA12 of the main control chip U1, and an output terminal COM1 of the analog switch U3 outputs a charging signal VCOM. The ground pin GND of the analog switch U3 is grounded GND, the power supply pin VCC is connected with a charging signal TYPE _ C _ VBUS output by a charging interface through a diode D1, and meanwhile, the power supply pin VCC is connected with a charging signal VSYS _ IN output by a battery through a diode D2 so as to obtain working voltage.
The master control chip U1 transmits an enable signal to the enable terminal IN1 of the analog switch U3 through the port PA12, and the output terminal COM1 of the trigger analog switch U3 is conducted with the first input terminal NC1, or the output terminal COM1 is conducted with the second input terminal NO 1. That is, the charging signal VCOM transmitted to the charging terminal of the earphone can be from the battery or from the TYPE _ C interface.
As shown in fig. 2, the switching circuit is electrically connected to the charging terminal of the earphone through the charging circuit, the input terminal of the charging circuit is electrically connected to the output terminal of the switching circuit, the output terminal of the charging circuit is electrically connected to the charging terminal of the earphone, and the enable terminal of the charging circuit is electrically connected to the main control chip. The output end of the switch circuit is electrically connected with the charging circuit through the first filter circuit 1, and is electrically connected with the charging end of the earphone through the second filter circuit 2. The charging circuit comprises a charging chip U4, and the charging chip is preferably a SY7072ABC chip.
As shown in fig. 2 and fig. 3, the specific connection relationship is: the first filter circuit 1 comprises a filter inductor L1, a filter capacitor C1 and a filter capacitor C2, one end of the filter inductor L1 is connected with a pin LX of a charging chip U4, the other end of the filter inductor L1 is connected with one end of a filter capacitor C1 and one end of a resistor R1, and the other end of the resistor R1 is connected with an output end COM1 of an analog switch U3 and is connected with a charging signal VCOM; the other end of the filter capacitor C1 is grounded, and one end of the filter capacitor C2 is connected to the pin IN of the charging chip U4. The enable terminal EN of the charging chip U4 is connected to the port PB3 of the main control chip U1. The output end OUT of the charging chip U4 is electrically connected with the charging end of the earphone through the second filter circuit 2 and the resistor R2. The second filter circuit 2 comprises a filter capacitor C3 and a filter capacitor C4 which are connected in parallel, one end of the filter capacitor C3 and one end of the filter capacitor C4 are connected with the output end OUT of the charging chip U4, and the other end of the filter capacitor C3 and the other end of the filter capacitor C4 are both grounded GND.
The main control chip U1 controls the charging chip U4 through the port PB3, and after the charging chip U4 works, the charging signal VCOM transmitted from the analog switch U3 is transmitted to the earphone charging terminal to charge the earphone.
To sum up, the charging box of the utility model separates the battery and the earphone charging by adding the analog switch, so that the battery can complete the charging with high efficiency, and the charging time is reduced; and ensures that the battery can charge the basic function of the earphone.
The above-mentioned preferred embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalent improvements of the charging box, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.
Claims (8)
1. A charging box comprises a charging interface, an earphone charging end and a main control chip, and is characterized by also comprising a power management circuit used for transmitting a charging signal to a battery and a switching circuit used for transmitting the charging signal to an earphone;
the input end of the power management circuit is electrically connected with the charging interface, the communication end of the power management circuit is electrically connected with the main control chip, and the output end of the power management circuit is electrically connected with the battery;
the switching circuit is respectively electrically connected with the main control chip, the battery, the charging interface and the earphone charging end, and the main control chip is used for enabling the switching circuit to conduct the battery and the earphone charging end or conduct the charging interface and the earphone charging end.
2. The charging box according to claim 1,
the charging interface is externally connected with a power supply, and the switching circuit is used for conducting the charging interface and the earphone charging end;
the charging interface is not externally connected with a power supply, and the switching circuit is used for conducting the battery and the earphone charging end.
3. The charging box according to claim 1, wherein the switching circuit is a switching circuit, a first input terminal of the switching circuit is electrically connected to the battery, a second input terminal of the switching circuit is electrically connected to the charging interface, an enable terminal of the switching circuit is electrically connected to the main control chip, and an output terminal of the switching circuit is electrically connected to the charging terminal of the earphone.
4. A charging box according to claim 3, characterized in that the switching circuit comprises an analog switch.
5. The charging box according to claim 3, wherein the switch circuit is electrically connected to the earphone charging terminal through a charging circuit, an input terminal of the charging circuit is electrically connected to an output terminal of the switch circuit, an output terminal of the charging circuit is electrically connected to the earphone charging terminal, and an enable terminal of the charging circuit is electrically connected to the main control chip.
6. A charging box according to any of claims 1 to 5, wherein the charging interface is a TYPE _ C interface.
7. A charging box according to claim 5, wherein said charging circuit is electrically connected to an output terminal of said switching circuit through a first filter circuit.
8. A charging box according to claim 5, wherein said charging circuit is electrically connected to said earphone charging terminal through a second filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922448367.0U CN211405531U (en) | 2019-12-30 | 2019-12-30 | Charging box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922448367.0U CN211405531U (en) | 2019-12-30 | 2019-12-30 | Charging box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211405531U true CN211405531U (en) | 2020-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922448367.0U Active CN211405531U (en) | 2019-12-30 | 2019-12-30 | Charging box |
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| CN (1) | CN211405531U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115347633A (en) * | 2022-06-30 | 2022-11-15 | 广芯微电子（广州）股份有限公司 | Charging and discharging management method, device and system for earphone cabin |
| CN115347632A (en) * | 2022-06-30 | 2022-11-15 | 广芯微电子（广州）股份有限公司 | Battery charging management method, device and system of TWS earphone |
-
2019
- 2019-12-30 CN CN201922448367.0U patent/CN211405531U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115347633A (en) * | 2022-06-30 | 2022-11-15 | 广芯微电子（广州）股份有限公司 | Charging and discharging management method, device and system for earphone cabin |
| CN115347632A (en) * | 2022-06-30 | 2022-11-15 | 广芯微电子（广州）股份有限公司 | Battery charging management method, device and system of TWS earphone |
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