CN212258494U - Earphone charging circuit and device - Google Patents
Earphone charging circuit and device Download PDFInfo
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- CN212258494U CN212258494U CN202021263850.8U CN202021263850U CN212258494U CN 212258494 U CN212258494 U CN 212258494U CN 202021263850 U CN202021263850 U CN 202021263850U CN 212258494 U CN212258494 U CN 212258494U
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Abstract
The utility model discloses an earphone charging circuit and device, the circuit includes: the charging box, the earphone end and a first control chip arranged on the earphone end; the voltage output end of the charging box is used for being connected with a charging interface of the earphone end, and the first control chip is in communication connection with the charging box; the first control chip is used for detecting the current voltage of the earphone end and sending voltage data to the charging box when the charging box is connected with the earphone end; the charging box is used for adjusting the voltage output to the earphone end according to the received voltage data so as to enable the output voltage to be larger than the current voltage of the earphone end. The utility model discloses an output voltage of box charges is adjusted for output voltage is in the certain extent interval with the pressure differential of the voltage of earphone end, avoids the too big and transmission loss that leads to of the pressure differential of the voltage of output voltage and earphone end too big.
Description
Technical Field
The utility model relates to a circuit electron field especially relates to earphone charging circuit and device.
Background
At present, the existing wireless earphones usually adopt a mode of charging by placing a charging box. The battery voltage of the battery output in the charging box can be subjected to direct current boosting and then 5V voltage stabilization is output, and the 5V voltage can be converted into the power supply voltage of the earphone to charge the earphone battery after the earphone end is connected with the charging end of the charging box. However, in the voltage boosting and reducing process, the charging box sends the boosted 5V voltage to the earphone terminal, the earphone terminal linearly reduces the 5V voltage to the power supply voltage (for example, 3.7V) required by the earphone battery, and the actual voltage difference (5V-3.7V ═ 1.3V) in the linear reduction is lost, so that the charging efficiency is low, and the cruising use of the earphone terminal is affected.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides an earphone charging circuit and device aims at solving the problem that current wireless earphone charging efficiency is low.
In order to achieve the above object, the utility model provides an earphone charging circuit, include: the charging box, the earphone end and a first control chip arranged on the earphone end;
the voltage output end of the charging box is used for being connected with a charging interface of the earphone end, and the first control chip is in communication connection with the charging box;
the first control chip is used for detecting the current voltage of the earphone end and sending voltage data to the charging box when the charging box is connected with the earphone end;
the charging box is used for adjusting the output voltage output to the earphone end according to the received voltage data so as to enable the output voltage to be larger than the current voltage of the earphone end.
Optionally, a voltage difference between the adjusted output voltage of the charging box and the voltage at the earphone end is within a preset range interval.
Optionally, the charging box includes a second control chip, a second battery, and a dc voltage regulation module, and an output terminal of the dc voltage regulation module is a voltage output terminal of the charging box;
the second control chip is used for receiving the voltage of the earphone end sent by the first control chip, generating a voltage regulating signal according to the voltage of the earphone end and sending the voltage regulating signal to the direct-current voltage regulating module;
and the direct current voltage regulating module is used for regulating the second voltage output by the second battery to be larger than the current voltage of the earphone end according to the voltage regulating signal.
Optionally, the charging box further comprises a voltage control circuit, and the second control chip is connected with the dc voltage regulation module through the voltage control circuit.
Optionally, the earphone end includes a charging module and a first battery; the output ends of the charging module, the first battery and the direct current voltage regulating module form a charging loop;
the detection end of the first control chip is connected with the first battery to detect the battery voltage of the first battery.
Optionally, the charging module is a linear charging module.
Optionally, the dc voltage regulating module is a dc voltage boosting module, a dc voltage reducing module, or a dc voltage boosting and reducing module.
Optionally, the data transmission mode of the first control chip and the second control chip is universal asynchronous serial transmission and reception.
Optionally, the dc voltage regulation module is of a synchronous structure or a non-synchronous structure.
Furthermore, in order to achieve the above object, the present invention also provides an earphone charging device, which includes an earphone charging circuit connected to an external power source, wherein the earphone charging circuit is configured as the earphone charging circuit described above.
The utility model discloses a voltage that first control chip detected the earphone end can adjust the output voltage that the box that charges provided to make the voltage of output be higher than the current voltage of earphone end slightly. In the charging process, along with the increase of the electric quantity of the earphone end battery, the voltage at the earphone end is also gradually increased, and after the first control chip detects the voltage gradual increase at the earphone end, the charging box can correspondingly increase the output voltage, so that the output voltage is always greater than the voltage at the earphone end, the voltage difference is within a certain range interval, and the problem that the transmission loss is excessively influenced by the overlarge voltage difference between the output voltage and the voltage at the earphone end is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of an embodiment of an earphone charging circuit according to the present invention;
fig. 2 is a charging voltage curve of the dc boost module of the present invention;
fig. 3 is the charging voltage curve of the dc buck-boost module of the present invention.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Earphone end | 21 | |
| 11 | |
22 | |
| 12 | |
23 | DC voltage regulating |
| 13 | |
24 | |
| 20 | Charging box | C1 | First capacitor |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an earphone charging circuit to the earphone through charging box for inserting charges.
Referring to fig. 1, in an embodiment, the headset charging circuit includes a charging box 20, a headset end 10, and a first control chip 11 disposed on the headset end 10. When the earphone terminal 10 is connected to the charging box 20, the voltage output terminal of the charging box 20 may be connected to the charging interface of the earphone terminal 10, and the first control chip 11 is further connected to the charging box 20 in a communication manner. The first control chip 11 of the earphone terminal 10 can detect the current voltage of the earphone terminal 10 in real time when the charging box 20 is connected with the earphone terminal 10 for charging, and transmit the voltage data to the charging box 20. After receiving the voltage data of the current voltage of the earphone terminal 10 detected by the first control chip 11 in real time, the charging box 20 adjusts the output voltage in real time, so that the output voltage is greater than the current voltage of the earphone terminal 10. The charging box 20 may adjust the output voltage such that a difference between the output voltage and the voltage of the earphone terminal 10 is within a preset range, for example, the voltage difference may be within a range of 0.1V to 0.3V, and the voltage range of the output voltage may be 3.8V to 4.6V. After the earphone terminal 10 receives the output voltage which is output by the voltage output end of the charging box 20 and is slightly higher than the voltage of the earphone terminal 10 through the charging interface, the battery of the earphone terminal 10 can be charged by using the output voltage, and when the difference between the output voltage and the voltage of the earphone terminal 10 is small, the electric energy conversion efficiency of the charging box 20 can be improved, and the differential pressure loss in the voltage conversion process can be reduced.
In this embodiment, the first control chip 11 detects the voltage of the earphone terminal 10 in real time, and the output voltage provided by the charging box 20 can be adjusted so that the output voltage is slightly higher than the real-time voltage of the earphone terminal 10. In the charging process, along with the increase of the electric quantity of the battery of the earphone end 10, the voltage of the earphone end 10 is gradually increased, after the first control chip 11 detects the gradual increase of the voltage of the earphone end 10, the charging box 20 can correspondingly increase the output voltage, so that the output voltage is always greater than the voltage of the earphone end 10, the voltage difference is within a certain range interval, and the phenomenon that the conversion efficiency is influenced by the overlarge transmission loss due to the overlarge voltage difference between the output voltage and the voltage of the earphone end 10 is avoided.
Further, with continued reference to fig. 1, the charging box 20 may include a second control chip 21, a second battery 22, and a dc voltage regulating module 23. The charging box 20 may charge the second battery 22 by connecting with an external power source. After the battery voltage of the second battery 22 meets the charging requirement, the charging box 20 can charge the earphone terminal 10. The second control chip 21 can receive the voltage data of the earphone terminal 10 sent by the first control chip 11 after the earphone terminal 10 is connected to the charging box 20, and accordingly generate a voltage regulating signal to be sent to the dc voltage regulating module 23. The input end of the direct current voltage regulating module 23 is connected with the second battery 22, and the output end of the direct current voltage regulating module 23 is connected with the charging interface of the earphone end 10 as the voltage output end of the charging box 20. The dc voltage regulating module 23 may receive the second voltage output by the second battery 22 and regulate the second voltage into an output voltage. Wherein, the output voltage is larger than the current voltage of the earphone terminal 10 and the voltage difference is smaller. The output voltage is adjusted through the voltage of the earphone end 10 detected in real time, so that the voltage difference between the output voltage and the voltage of the earphone end 10 can be reduced under the condition that the earphone end 10 is guaranteed to be charged, and the voltage difference loss is reduced.
It should be noted that the first Control chip 11 may be a DSP (Digital Signal processing) chip or an MCU (Micro Control Unit) chip, and the second Control chip 21 may be an MCU chip. The data transmission mode of the first control chip 11 and the second control chip 21 may be a UART (Universal Asynchronous Receiver/Transmitter), an IIC transmission mode, or the like. After receiving the real-time voltage of the earphone terminal 10, the second control chip 21 may send a data signal to the dc voltage regulating module 23 to adjust the output voltage, where the data signal may be a PWM signal, an IIC signal, or an analog level signal. When the second control chip 21 sends the PWM signal, a voltage control circuit 24 may be further disposed between the second control chip 21 and the dc voltage regulating module 23 to perform low-pass filtering on the PWM signal sent by the second control chip 21, so as to avoid interference of a high-frequency signal and a noise signal.
The earphone terminal 10 may include a charging module 12 and a first battery 13. The charging module 12 may be a linear charging module 12, and the charging current gradually decreases as the voltage of the battery at the earphone end 10 increases to approach the full charge voltage during the charging process. The output end of the dc voltage regulating module 23, the charging module 12 and the first battery 13 form a charging loop. The charging module 12 may perform voltage reduction and current limitation processing on the output voltage output by the dc voltage regulating module 23, and then charge the first battery 13 of the earphone terminal 10. The detection terminal of the first control chip 11 is connected to the first battery 13 to detect the battery voltage of the first battery 13 in real time during the charging process of the first battery 13.
It is understood that a first capacitor C1 may be further disposed in the charging loop, and the first capacitor C1 may be a polar capacitor to filter ac signal interference in the charging loop.
Further, in the above embodiment, the dc voltage regulating module 23 may be a dc voltage boosting module or a dc voltage boosting and reducing module. When the charging box 20 is a multi-battery series connection, the dc voltage regulating module 23 may also be a dc voltage reducing module. As shown in fig. 2 to 3, fig. 2 and 3 are charging voltage curves of the dc boost module and the dc buck-boost module, respectively. The voltage of the earphone terminal 10 is the battery voltage of the first battery 13, the voltage of the charging box 20 is the battery voltage of the second battery 22, and the boosted output voltage is the output voltage of the dc voltage regulating module 23. Alternatively, the dc voltage regulation module 23 may be of a synchronous structure type or a non-synchronous structure type.
The utility model provides a headphone charging device, this headphone charging device include the earphone charging circuit who is connected with external power source, and above-mentioned embodiment can be referred to this earphone charging circuit's structure, no longer gives unnecessary details here. It should be noted that, since the earphone charging device of the present embodiment adopts the technical solution of the earphone charging circuit, the earphone charging device has all the beneficial effects of the earphone charging circuit.
The above is only the optional embodiment of the present invention, and not therefore the scope of the present invention is limited, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. An earphone charging circuit, comprising: the charging box, the earphone end and a first control chip arranged on the earphone end;
the voltage output end of the charging box is used for being connected with a charging interface of the earphone end, and the first control chip is in communication connection with the charging box;
the first control chip is used for detecting the current voltage of the earphone end and sending voltage data to the charging box when the charging box is connected with the earphone end;
the charging box is used for adjusting the voltage output to the earphone end according to the received voltage data so as to enable the output voltage to be larger than the current voltage of the earphone end.
2. The headset charging circuit of claim 1, wherein a voltage difference between the adjusted output voltage of the charging box and the voltage at the headset end is within a predetermined range.
3. The headset charging circuit of claim 2, wherein the charging box comprises a second control chip, a second battery and a dc voltage regulating module, and the output terminal of the dc voltage regulating module is the voltage output terminal of the charging box;
the second control chip is used for receiving the voltage of the earphone end sent by the first control chip, generating a voltage regulating signal according to the voltage of the earphone end and sending the voltage regulating signal to the direct-current voltage regulating module;
and the direct current voltage regulating module is used for regulating the second voltage output by the second battery to be larger than the current voltage of the earphone end according to the voltage regulating signal.
4. The headset charging circuit of claim 3, wherein the charging box further comprises a voltage control circuit, and the second control chip is connected to the dc voltage regulation module through the voltage control circuit.
5. The headset charging circuit of claim 3, wherein the headset end comprises a charging module and a first battery; the output ends of the charging module, the first battery and the direct current voltage regulating module form a charging loop;
the detection end of the first control chip is connected with the first battery to detect the battery voltage of the first battery.
6. The headset charging circuit of claim 5, wherein the charging module is a linear charging module.
7. The headset charging circuit of claim 3, wherein the DC voltage regulation module is a DC boost module, a DC buck module, or a DC buck-boost module.
8. The headset charging circuit of any one of claims 3-7, wherein the data transmission mode of the first control chip and the second control chip is universal asynchronous serial transceiving transmission.
9. A headset charging circuit according to any of claims 3 to 7, wherein the DC voltage regulation module is of either synchronous or asynchronous construction.
10. An earphone charging device, comprising an earphone charging circuit connected to an external power source, wherein the earphone charging circuit is configured as the earphone charging circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021263850.8U CN212258494U (en) | 2020-06-30 | 2020-06-30 | Earphone charging circuit and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021263850.8U CN212258494U (en) | 2020-06-30 | 2020-06-30 | Earphone charging circuit and device |
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| Publication Number | Publication Date |
|---|---|
| CN212258494U true CN212258494U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021263850.8U Active CN212258494U (en) | 2020-06-30 | 2020-06-30 | Earphone charging circuit and device |
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| CN (1) | CN212258494U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641243A (en) * | 2020-06-30 | 2020-09-08 | Tcl通力电子（惠州）有限公司 | Earphone charging circuit and device |
| CN113891215A (en) * | 2021-11-17 | 2022-01-04 | 启攀微电子（上海）有限公司 | A innovative battery compartment structure for wireless bluetooth headset |
| US20230379613A1 (en) * | 2022-05-18 | 2023-11-23 | Merry Electronics Co., Ltd. | Headset charging system and headset charging method thereof |
| US12133040B2 (en) * | 2022-05-18 | 2024-10-29 | Merry Electronics Co., Ltd. | Headset charging system and headset charging method thereof |
-
2020
- 2020-06-30 CN CN202021263850.8U patent/CN212258494U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111641243A (en) * | 2020-06-30 | 2020-09-08 | Tcl通力电子（惠州）有限公司 | Earphone charging circuit and device |
| CN113891215A (en) * | 2021-11-17 | 2022-01-04 | 启攀微电子（上海）有限公司 | A innovative battery compartment structure for wireless bluetooth headset |
| US20230379613A1 (en) * | 2022-05-18 | 2023-11-23 | Merry Electronics Co., Ltd. | Headset charging system and headset charging method thereof |
| US12133040B2 (en) * | 2022-05-18 | 2024-10-29 | Merry Electronics Co., Ltd. | Headset charging system and headset charging method thereof |
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