CN113328504A - Wireless earphone charging circuit and charging box - Google Patents
Wireless earphone charging circuit and charging box Download PDFInfo
- Publication number
- CN113328504A CN113328504A CN202110880640.6A CN202110880640A CN113328504A CN 113328504 A CN113328504 A CN 113328504A CN 202110880640 A CN202110880640 A CN 202110880640A CN 113328504 A CN113328504 A CN 113328504A
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- charging
- resistor
- linear
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H02J7/50—
-
- H02J7/44—
-
- H02J7/751—
-
- H02J7/96—
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1025—Accumulators or arrangements for charging
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2420/00—Details of connection covered by H04R, not provided for in its groups
- H04R2420/07—Applications of wireless loudspeakers or wireless microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The embodiment of the application discloses a wireless earphone charging circuit and a charging box, wherein the circuit comprises a booster circuit, a first charging circuit and a second charging circuit, the first charging circuit is used for charging a first wireless earphone, and the second charging circuit is used for charging a second wireless earphone; the first charging circuit and the second charging circuit respectively comprise a linear voltage stabilizing circuit, a communication module and a charging contact, the communication module is used for sending the received target battery voltage to the linear voltage stabilizing circuit, the linear voltage stabilizing circuit is used for adjusting the charging voltage of the wireless earphone according to the target battery voltage, and the target battery voltage is the battery voltage of the wireless earphone. This application can carry out independent control, each other influence to wireless headset's charging circuit about through first charging circuit and second charging circuit to can reduce headset charging circuit's pressure differential and loss, improve charge efficiency.
Description
Technical Field
The application relates to the technical field of wireless Bluetooth, in particular to a wireless earphone charging circuit and a charging box.
Background
A True Wireless Stereo (TWS) headset generally consists of two independent Wireless headsets without cables and a charging box for charging them. The charging mode of the TWS earphone is basically realized by the charging box, and the charging box can provide additional power supply supplement for the wireless earphone, so that the endurance time of the wireless earphone is prolonged to more than ten hours, and the all-weather use requirement of a user is met.
At present, as shown in fig. 1, the charging box generates a fixed output voltage of 5V through the boost circuit to charge two wireless earphones at the same time, and when the two wireless earphones are fully charged, the boost circuit is charged and turned off to enter a standby state to save power consumption. However, the charging box can only output 5V voltage to two earphones at the same time, that is, the charging circuits of the two wireless earphones can only be simultaneously turned on or off, and cannot be independently controlled. Therefore, when the power of the two wireless headsets is different, the fully charged headset needs to wait for the other wireless headset to be fully charged to enter a standby state, and when one of the headsets is abnormal (such as short circuit), the other headset cannot be charged.
Disclosure of Invention
The embodiment of the application provides a wireless earphone charging circuit and box that charges can carry out independent control, each other influence to the charging circuit of controlling wireless earphone to can reduce earphone charging circuit's pressure differential and loss, improve charge efficiency.
In a first aspect, the wireless headset charging circuit provided in an embodiment of the present application includes a voltage boost circuit, a first charging circuit, and a second charging circuit, where the voltage boost circuit is respectively connected to the first charging circuit and the second charging circuit, the voltage boost circuit is configured to adjust a power supply voltage to a first voltage, the first charging circuit is configured to charge a first wireless headset, and the second charging circuit is configured to charge a second wireless headset;
the first charging circuit and the second charging circuit respectively comprise a linear voltage stabilizing circuit, a communication module and a charging contact, the communication module is respectively connected with the linear voltage stabilizing circuit and the charging contact, the linear voltage stabilizing circuit is connected with the charging contact, the communication module is used for sending received target battery voltage to the linear voltage stabilizing circuit, the linear voltage stabilizing circuit is used for adjusting charging voltage of the wireless earphone according to the target battery voltage, and the target battery voltage is the battery voltage of the wireless earphone.
In a second aspect, an embodiment of the present application provides a wireless headset charging chip, where the wireless headset charging chip includes the wireless headset charging circuit of the first aspect.
In a third aspect, an embodiment of the present application provides a charging box, where the charging box includes the wireless headset charging circuit according to the first aspect or the wireless headset charging chip according to the second aspect.
The wireless earphone charging circuit comprises a booster circuit, a first charging circuit and a second charging circuit, wherein the booster circuit is used for adjusting power supply voltage to first voltage, the first charging circuit is used for charging a first wireless earphone, and the second charging circuit is used for charging a second wireless earphone; the first charging circuit and the second charging circuit respectively comprise a linear voltage stabilizing circuit, a communication module and a charging contact, the communication module is respectively connected with the linear voltage stabilizing circuit and the charging contact, the communication module is used for sending the received target battery voltage to the linear voltage stabilizing circuit, the linear voltage stabilizing circuit is used for adjusting the charging voltage of the wireless earphone according to the target battery voltage, and the target battery voltage is the battery voltage of the wireless earphone. The charging circuits of the left wireless earphone and the right wireless earphone can be independently controlled and do not influence each other through the first charging circuit and the second charging circuit; and the charging voltage of the wireless earphone is adjusted through the linear voltage stabilizing circuit, so that the charging box can adjust the charging voltage according to a battery circuit of the wireless earphone, the voltage difference and the loss of a charging loop of the earphone can be reduced, and the charging efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a charging circuit of a wireless headset in the prior art;
fig. 2 is a schematic structural diagram of a wireless headset charging circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a voltage boosting circuit according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating a structure of a linear voltage regulator circuit according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of another wireless headset charging circuit according to an embodiment of the present disclosure.
Detailed Description
In order to better understand the technical solutions of the present application, the following description is given for clarity and completeness in conjunction with the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step on the basis of the description of the embodiments of the present application belong to the protection scope of the present application.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, software, product, or apparatus that comprises a list of steps or elements is not limited to those listed but may include other steps or elements not listed or inherent to such process, method, product, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The embodiments of the present application will be described with reference to the drawings, in which a dot at the intersection of intersecting wires indicates that the wires are connected, and a dot-free intersection indicates that the wires are not connected.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a wireless headset charging circuit according to an embodiment of the present disclosure. The wireless earphone charging circuit comprises a booster circuit 100, a first charging circuit 200 and a second charging circuit 300, wherein the booster circuit 100 is respectively connected with the first charging circuit 200 and the second charging circuit 300, the booster circuit 100 is used for adjusting power supply voltage to first voltage, the first charging circuit 200 is used for charging a first wireless earphone, and the second charging circuit 300 is used for charging a second wireless earphone.
The first charging circuit 200 and the second charging circuit 300 both comprise a linear voltage stabilizing circuit, a communication module and a charging contact, the communication module is respectively connected with the linear voltage stabilizing circuit and the charging contact, the linear voltage stabilizing circuit is connected with the charging contact, the communication module is used for sending the received target battery voltage to the linear voltage stabilizing circuit, the linear voltage stabilizing circuit is used for adjusting the charging voltage of the wireless headset according to the target battery voltage, and the target battery voltage is the battery voltage of the wireless headset.
Further, the wireless headset includes the first wireless headset and the second wireless headset.
Optionally, as shown in fig. 3, the voltage boost circuit 100 includes a first capacitor C1, a second capacitor C2, a first inductor L1, a first transistor Q1, a second transistor Q2, a first resistor R1, a second resistor R2, a comparison amplifier U1, and a PWM driver.
Wherein, one end of the first capacitor C1 is connected to one end of the first inductor L1 and the input end of the voltage boost circuit 100, the other end of the first capacitor C1 is grounded, the other end of the first inductor L1 is connected to the source of the first transistor Q1 and the drain of the second transistor Q2, the drain of the first transistor Q1 is grounded, the gate of the first transistor Q1 and the gate of the second transistor Q2 are both connected to the output end of the PWM driver, the input end of the PWM driver is connected to the output end of the comparison amplifier U1, the positive input end of the comparison amplifier U1 is connected to one end of the first resistor R1 and one end of the second resistor R2, the other end of the second resistor R2 is grounded, the other end of the first resistor R1 is connected to the source of the first transistor Q1, one end of the second capacitor C2 and the output end of the voltage boost circuit 100, the other end of the second capacitor C2 is grounded.
The input end of the booster circuit is connected with a power supply battery of the charging box, the first capacitor C1 is used as an input capacitor, the second capacitor C2 is used as an output capacitor, and the first inductor L1 is used for storing energy. The first transistor Q1 may be an N-channel MOS transistor, and the second transistor Q2 may be a P-channel MOS transistor.
In the embodiment of the present application, the operation of the voltage boost circuit is divided into a charging state and a discharging state, in the charging state, that is, during the charging process of the first inductor L1, the first transistor Q1 is turned on, the voltage Vbat of the power supply battery flows through the first inductor L1, the current on the first inductor L1 linearly increases at a certain rate, and the first inductor L1 stores energy. At the same time the voltage Vbat is also drained through the parasitic diode of the second transistor Q2 to the output port, powering the second capacitor C2, such that the voltage across the second capacitor C2 remains above the voltage Vbat. In a discharging state, that is, during the discharging process of the first inductor L1, the first transistor Q1 is turned off, the second transistor Q2 is turned on, and the current of the first inductor L1 cannot change, that is, the first inductor L1 starts to charge the second capacitor C2, so that the voltage across the second capacitor C2 is increased, and at this time, the voltage at the output port of the voltage boosting circuit 100 is greater than the voltage Vbat at the input port.
Based on this, the voltage boost circuit makes the voltage of the output port of the voltage boost circuit 100 greater than the voltage of the input port by continuously repeating the charging process and the discharging process of the first inductor L1, thereby realizing the voltage boost of the power supply battery voltage in the charging box.
The first resistor R1 and the second resistor R2 are both adjustable resistors; the voltage boost circuit 100 is used to determine the value of the first voltage according to the ratio of the first resistor R1 and the second resistor R2.
Specifically, the inverting input terminal of the comparison amplifier is connected to a VREF reference voltage, the first resistor R1 and the second resistor R2 are feedback resistors of the voltage boost circuit 100, the output voltage of the comparison amplifier U1 is recycled to the forward input terminal of the comparison amplifier U1 to be compared with the VREF reference voltage, and an effective input signal obtained through comparison is used for driving the PWM driver to adjust the conduction degree of the first transistor Q1 and the second transistor, so that the charging and discharging process of the first inductor L1 is realized. Wherein the value of the output voltage of the voltage boost circuit 100, i.e., the value of the first voltage, can be adjusted by adjusting the ratio of the first resistor R1 and the second resistor R2.
Optionally, as shown in fig. 4, the linear voltage regulating circuit includes a third capacitor C3, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a third transistor Q3, and a voltage controller.
One end of the third capacitor C3 is connected to one end of the third resistor R3, the drain of the third transistor Q3, and the input end of the linear voltage regulator circuit, the other end of the third capacitor C3 is grounded, the other end of the third resistor R3 is connected to the output end of the voltage controller and the gate of the third transistor Q3, the input end of the voltage controller is connected to one end of the fourth resistor R4 and one end of the fifth resistor R5, the other end of the fifth resistor R5 is grounded, and the other end of the fourth resistor R4 is connected to the output end of the linear voltage regulator circuit and the source of the third transistor.
Wherein, the voltage controller can generate different output voltages. The linear voltage regulator circuit can adjust the gate voltage of the third transistor Q3 through different output voltages of the voltage controller, thereby dynamically adjusting the conduction degree of the third transistor Q3. When the linear voltage stabilizing circuit is in a working mode, namely the output voltage is dynamically adjusted according to the battery voltage of the wireless earphone, the third transistor Q3 is in a linear region; when the linear voltage regulating circuit is in the through mode, namely the voltage Vout1 at the output end of the linear voltage regulating circuit is equal to the voltage Vout at the input end, the Vout is the voltage at the output end of the voltage boosting circuit 100, and the third transistor Q3 is in a complete conduction region; the third transistor Q3 is in the off region when the linear voltage regulator circuit is not outputting a voltage.
For example, when the output voltage Vout of the voltage boost circuit 100 is 5V, the range of the output voltage Vout1 in the operating mode of the linear voltage regulator circuit is 3V to 4.2V.
Optionally, the fourth resistor R4 and the fifth resistor R5 are feedback resistors, and the value of the output voltage Vout1 of the linear voltage regulator circuit can be adjusted by adjusting the ratio of the fourth resistor R4 to the fifth resistor R5.
In the embodiment of the application, the communication module is used for communicating with the wireless headset, periodically acquiring the power information of the wireless headset, and feeding the power information back to the linear voltage stabilizing circuit, so that the linear voltage stabilizing circuit adjusts the output voltage Vout1 in real time.
Optionally, the linear voltage stabilizing circuit is configured to adjust a charging voltage of the wireless headset according to the target battery voltage, and specifically includes: if the target battery voltage is greater than the constant voltage charging voltage, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a second voltage, and the second voltage is less than or equal to the first voltage; if the target battery voltage is less than or equal to the constant voltage charging voltage, the voltage controller judges whether the target battery voltage is less than a first value, wherein the first value is the sum of the output voltage of the linear voltage stabilizing circuit and the charging bias voltage; and when the target battery voltage is less than or equal to a first value, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a third voltage, otherwise, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a fourth voltage, the fourth voltage is equal to the sum of the third voltage and the adjusting voltage, and the third voltage is less than the second voltage.
A timer may be set in the communication module, and the timer timing time may be set according to a preset time, for example, 1 minute, 2 minutes, 4 minutes, and the like, and may also be set according to a charging speed of the wireless headset, which is not limited herein. The timing time is the normal charging time of the wireless earphone, namely the linear voltage stabilizing circuit is in a direct-through mode; when the timing time is over, the communication module can acquire the electric quantity of the earphone from the wireless earphone and feed the electric quantity of the earphone back to the linear voltage stabilizing circuit, so that the linear voltage stabilizing circuit adjusts the output voltage and the voltage difference and the loss of a charging loop of the wireless earphone are reduced.
Specifically, after the linear voltage stabilizing circuit receives the earphone electric quantity, namely the target battery voltage, the voltage controller can judge the current charging state of the wireless earphone according to the target battery voltage. If the wireless earphone enters a constant voltage charging stage, namely the target battery voltage is greater than the constant voltage charging voltage Vc, the linear voltage stabilizing circuit is set to be in a direct-through mode, and the wireless earphone is charged normally. If the wireless earphone is in the constant-current charging stage, that is, the target battery voltage is greater than the constant-voltage charging voltage Vc, the voltage controller determines whether the target battery voltage is less than or equal to the sum of the current output voltage Vout1 of the linear voltage stabilizing circuit and the charging bias voltage Vs. If the target battery voltage is less than the sum of the current output voltage Vout1 of the linear voltage stabilizing circuit and the charging bias voltage Vs, ending the output voltage adjustment process and continuing to charge the wireless earphone with the current output voltage; if the target battery voltage is greater than the sum of the present output voltage Vout1 of the linear regulator circuit and the charging bias voltage Vs, it indicates that the present output voltage Vout1 of the linear regulator circuit needs to be adjusted, so that the linear regulator circuit is controlled to increase an adjustment value Vstep, which may be a negative value, based on the present output voltage Vout for decreasing the present output voltage Vout of the linear regulator circuit.
It should be noted that the constant voltage charging voltage Vc, the charging bias voltage Vs, and the adjustment value Vstep can be configured to have different values according to actual battery requirements, and are not limited herein.
Optionally, the linear voltage stabilizing circuit is further configured to control the wireless headset to enter a standby state when the wireless headset is fully charged.
In the embodiment of the application, the wireless earphone can be in a standby state after being fully charged, so that the voltage difference of a charging loop of the wireless earphone and the loss of the wireless earphone are reduced.
The linear voltage stabilizing circuit is further configured to control the wireless headset to enter a standby state when the wireless headset is fully charged, and specifically includes: and when the target battery voltage is greater than or equal to the preset voltage, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a fifth voltage.
Specifically, before the output voltage of the linear voltage regulator circuit is adjusted, it can be determined whether the wireless earphone is fully charged. If the wireless earphone is full, the linear voltage stabilizing circuit is closed, and the standby condition required by the wireless earphone is set; and if the wireless earphone is not fully charged, adjusting the output voltage of the linear voltage stabilizing circuit. Specifically, after receiving the target battery voltage, the voltage controller compares the target battery voltage with a preset voltage, and if the target battery voltage is greater than or equal to the preset voltage, the voltage controller may control the linear voltage regulator circuit to not output the voltage, that is, control the third transistor Q3 to be in a cut-off state.
In the embodiment of the present application, the wireless headset entering the standby state may include two ways. The other is that the charging box enters standby by sending an instruction, specifically, the communication module sends an instruction to instruct the linear voltage stabilizing circuit to be directly closed, and the output voltage is 0V. The other is to control the output of the linear voltage stabilizing circuit to output a constant voltage to the wireless earphone, wherein the constant voltage can be 5v, 3v, 2v and the like according to the requirements of different wireless earphones.
Optionally, the fourth resistor and the fifth resistor are both adjustable resistors; the linear voltage stabilizing circuit is used for determining the value of a target output voltage according to the ratio of the fourth resistor to the fifth resistor, wherein the target output voltage comprises the second voltage, the third voltage, the fourth voltage and the fifth voltage.
The fourth resistor R4 and the fifth resistor R5 are feedback resistors, and the values of the second voltage, the third voltage, the fourth voltage and the fifth voltage can be adjusted by adjusting the ratio of the fourth resistor R4 to the fifth resistor R5.
It can be seen that the wireless headset charging circuit provided in the embodiment of the present application includes a voltage boost circuit, a first charging circuit and a second charging circuit, where the voltage boost circuit is configured to adjust a power supply voltage to a first voltage, the first charging circuit is configured to charge a first wireless headset, and the second charging circuit is configured to charge a second wireless headset; the first charging circuit and the second charging circuit respectively comprise a linear voltage stabilizing circuit, a communication module and a charging contact, the communication module is respectively connected with the linear voltage stabilizing circuit and the charging contact, the communication module is used for sending the received target battery voltage to the linear voltage stabilizing circuit, the linear voltage stabilizing circuit is used for adjusting the charging voltage of the wireless earphone according to the target battery voltage, and the target battery voltage is the battery voltage of the wireless earphone. The charging circuits of the left wireless earphone and the right wireless earphone can be independently controlled and do not influence each other through the first charging circuit and the second charging circuit; and the charging voltage of the wireless earphone is adjusted through the linear voltage stabilizing circuit, so that the charging box can adjust the charging voltage according to a battery circuit of the wireless earphone, the voltage difference and the loss of a charging loop of the earphone can be reduced, and the charging efficiency is improved.
Exemplarily, as shown in fig. 5, fig. 5 is a schematic structural diagram of another wireless headset charging circuit provided in an embodiment of the present application. The wireless headset charging circuit comprises a booster circuit 100, a first linear voltage stabilizing circuit 210, a second linear voltage stabilizing circuit 310, a communication module 400, a first charging contact 220 and a second charging contact 320.
The boosting circuit 100 is connected to the first linear voltage stabilizing circuit 210 and the second linear voltage stabilizing circuit 310 respectively; the first linear voltage stabilizing circuit 210 is respectively connected with the communication module 400 and the first charging contact 220; the second linear voltage stabilizing circuit 310 is connected to the communication module 400 and the second charging contact 320, respectively.
Further, the first linear voltage stabilizing circuit 210, the communication module 400 and the first charging contact 220 form a first charging circuit 200, the first charging circuit 200 is used for charging a first wireless earphone, the second linear voltage stabilizing circuit 310, the communication module 400 and the second charging contact 320 form a second charging circuit 300, and the second charging circuit 300 is used for charging a second wireless earphone.
Specifically, the communication module may receive battery voltages of the first wireless headset and the second wireless headset. Then sending the battery voltage of the first wireless earphone to the first linear voltage stabilizing circuit so that the first linear voltage stabilizing circuit adjusts the output voltage of the first wireless earphone according to the battery voltage of the first wireless earphone; and sending the battery voltage of the second wireless earphone to the second linear voltage stabilizing circuit so that the second linear voltage stabilizing circuit adjusts the output voltage of the second wireless earphone according to the battery voltage of the second wireless earphone.
The circuit structures and implementation principles of the first linear voltage stabilizing circuit and the second linear voltage stabilizing circuit are the same as those of the linear voltage stabilizing circuit in fig. 2, and reference may be made to the description in fig. 2 for details, which are not repeated herein.
In the embodiment of the application, the charging circuit of each wireless earphone is linear charging, and the output voltages of the first linear voltage stabilizing circuit and the second linear voltage stabilizing circuit are dynamically adjusted after the charging box can pass the acquired battery voltage of the wireless earphone, so that the charging box can adapt to the battery voltage at the wireless earphone end by the optimal output voltage, the pressure difference and the loss of the charging circuit of the wireless earphone are reduced as much as possible, the charging efficiency is improved, the temperature rise is improved, and the high-current quick charging can be realized.
The embodiments of the present application refer to the ordinal numbers "first", "second", etc. for distinguishing a plurality of objects, and do not limit the sequence, timing, priority, or importance of the plurality of objects. For example, the first information and the second information are different information only for distinguishing them from each other, and do not indicate a difference in the contents, priority, transmission order, importance, or the like of the two kinds of information.
The embodiment of the application further provides a wireless earphone charging chip, and the wireless earphone charging chip comprises any wireless earphone charging circuit recorded in the embodiment.
The embodiment of the application also provides a charging box, which comprises any one of the wireless earphone charging chip or the wireless earphone charging circuit described in the embodiment.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed wireless headset charging circuit may be implemented in other manners. For example, the above-described embodiments of the wireless headset charging circuit are merely illustrative, and for example, the components in the above-described circuit may also adopt other components with the same functions. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, circuits or components, and may be in an electrical or other form.
In addition, each circuit in the embodiments of the present application may be integrated in one circuit board, or each circuit may exist alone, or two or more circuits may be integrated in one circuit board.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application with specific examples, and the above description of the embodiments is only provided to help understand the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in view of the above, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A wireless earphone charging circuit is characterized by comprising a booster circuit, a first charging circuit and a second charging circuit, wherein the booster circuit is respectively connected with the first charging circuit and the second charging circuit, the booster circuit is used for adjusting power supply voltage to a first voltage, the first charging circuit is used for charging a first wireless earphone, and the second charging circuit is used for charging a second wireless earphone;
the first charging circuit and the second charging circuit respectively comprise a linear voltage stabilizing circuit, a communication module and a charging contact, the communication module is respectively connected with the linear voltage stabilizing circuit and the charging contact, the linear voltage stabilizing circuit is connected with the charging contact, the communication module is used for sending received target battery voltage to the linear voltage stabilizing circuit, the linear voltage stabilizing circuit is used for adjusting charging voltage of the wireless earphone according to the target battery voltage, and the target battery voltage is the battery voltage of the wireless earphone.
2. The circuit of claim 1, wherein the boost circuit comprises a first capacitor, a second capacitor, a first inductor, a first transistor, a second transistor, a first resistor, a second resistor, a comparison amplifier, and a Pulse Width Modulation (PWM) driver;
one end of the first capacitor is respectively connected with one end of the first inductor and the input end of the booster circuit, the other end of the first capacitor is grounded, the other end of the first inductor is respectively connected with the source electrode of the first transistor and the drain electrode of the second transistor, the drain electrode of the first transistor is grounded, the grid electrode of the first transistor and the grid electrode of the second transistor are both connected with the output end of the PWM driver, the input end of the PWM driver is connected with the output end of the comparison amplifier, the positive input end of the comparison amplifier is respectively connected with one end of the first resistor and one end of the second resistor, the other end of the second resistor is grounded, the other end of the first resistor is respectively connected with the source electrode of the first transistor, one end of the second capacitor and the output end of the booster circuit, and the other end of the second capacitor is grounded.
3. The circuit of claim 2, wherein the first resistor and the second resistor are both adjustable resistors;
the voltage boost circuit is used for determining the value of the first voltage according to the ratio of the first resistor and the second resistor.
4. The circuit of any of claims 1-3, wherein the linear voltage regulator circuit comprises a third capacitor, a third resistor, a fourth resistor, a fifth resistor, a third transistor, and a voltage controller;
one end of the third capacitor is connected to one end of the third resistor, the drain of the third transistor and the input end of the linear voltage stabilizing circuit respectively, the other end of the third capacitor is grounded, the other end of the third resistor is connected to the output end of the voltage controller and the gate of the third transistor respectively, the input end of the voltage controller is connected to one end of the fourth resistor and one end of the fifth resistor respectively, the other end of the fifth resistor is grounded, and the other end of the fourth resistor is connected to the output end of the linear voltage stabilizing circuit and the source of the third transistor respectively.
5. The circuit of claim 4, wherein the linear voltage regulator circuit is configured to adjust a charging voltage of the wireless headset according to the target battery voltage, and specifically comprises:
if the target battery voltage is greater than the constant voltage charging voltage, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a second voltage, and the second voltage is less than or equal to the first voltage;
if the target battery voltage is less than or equal to the constant voltage charging voltage, the voltage controller judges whether the target battery voltage is less than a first value, wherein the first value is the sum of the output voltage of the linear voltage stabilizing circuit and the charging bias voltage;
and when the target battery voltage is less than or equal to a first value, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a third voltage, otherwise, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a fourth voltage, the fourth voltage is equal to the sum of the third voltage and an adjustment value, and the third voltage is less than the second voltage.
6. The circuit of claim 5, wherein the linear voltage regulator circuit is further configured to control the wireless headset to enter a standby state when the wireless headset is fully charged.
7. The circuit of claim 6, wherein the linear voltage regulator circuit is further configured to control the wireless headset to enter a standby state when the wireless headset is fully charged, and specifically comprises:
and when the target battery voltage is greater than or equal to a preset voltage, the voltage controller controls the output voltage of the linear voltage stabilizing circuit to be a fifth voltage.
8. The circuit of claim 7, wherein the fourth resistor and the fifth resistor are both adjustable resistors;
the linear voltage stabilizing circuit is used for determining the value of a target output voltage according to the ratio of the fourth resistor to the fifth resistor, wherein the target output voltage comprises the second voltage, the third voltage, the fourth voltage and the fifth voltage.
9. A wireless headset charging chip, characterized in that the wireless headset charging chip comprises a wireless headset charging circuit according to any of claims 1-8.
10. A charging box, characterized in that the charging box comprises the wireless headset charging circuit according to any one of claims 1-8 or the wireless headset charging chip according to claim 9.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110880640.6A CN113328504B (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and charging box |
| CN202111353535.3A CN115701680A (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and relevant charging chip and charging box |
| PCT/CN2022/108174 WO2023011278A1 (en) | 2021-08-02 | 2022-07-27 | Wireless earphone charging circuit and charging box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110880640.6A CN113328504B (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and charging box |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111353535.3A Division CN115701680A (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and relevant charging chip and charging box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113328504A true CN113328504A (en) | 2021-08-31 |
| CN113328504B CN113328504B (en) | 2021-10-08 |
Family
ID=77426762
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110880640.6A Active CN113328504B (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and charging box |
| CN202111353535.3A Pending CN115701680A (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and relevant charging chip and charging box |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111353535.3A Pending CN115701680A (en) | 2021-08-02 | 2021-08-02 | Wireless earphone charging circuit and relevant charging chip and charging box |
Country Status (2)
| Country | Link |
|---|---|
| CN (2) | CN113328504B (en) |
| WO (1) | WO2023011278A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256941A (en) * | 2022-03-01 | 2022-03-29 | 深圳英集芯科技股份有限公司 | Charging circuit, device and equipment |
| CN114839571A (en) * | 2022-06-30 | 2022-08-02 | 深圳英集芯科技股份有限公司 | Circuits and electronic equipment for detecting equipment plugging and unplugging |
| WO2023011278A1 (en) * | 2021-08-02 | 2023-02-09 | 深圳英集芯科技股份有限公司 | Wireless earphone charging circuit and charging box |
| WO2023134462A1 (en) * | 2022-01-11 | 2023-07-20 | 荣耀终端有限公司 | Power adapter, and charging system and method |
| CN116528105A (en) * | 2023-07-03 | 2023-08-01 | 紫光同芯微电子有限公司 | Self-starting discharging circuit and charging method for earphone charging bin |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733032A (en) * | 2017-10-30 | 2018-02-23 | 华南理工大学 | A kind of boost type wireless charging receiving circuit |
| CN109768606A (en) * | 2019-03-27 | 2019-05-17 | 上海爻火微电子有限公司 | Earphone charging circuit and earphone charging box |
| CN110475171A (en) * | 2019-07-12 | 2019-11-19 | 安克创新科技股份有限公司 | Wireless earphone assembly and earphone case assembly |
| US20200127482A1 (en) * | 2018-10-23 | 2020-04-23 | Google Llc | Dynamic Adjustment Of Charging Voltage Supplied From A First Device To A Second Device |
| CN211579629U (en) * | 2019-12-24 | 2020-09-25 | 山东康威通信技术股份有限公司 | Constant voltage and constant current charging device applied to low-power-consumption environment |
| WO2021080982A1 (en) * | 2019-10-25 | 2021-04-29 | Apple Inc. | Closed loop headroom management for battery charging |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209375210U (en) * | 2019-03-27 | 2019-09-10 | 上海爻火微电子有限公司 | Earphone charging circuit and earphone charging box |
| CN110994738A (en) * | 2019-12-24 | 2020-04-10 | 山东康威通信技术股份有限公司 | Constant-voltage constant-current charging device and charging method applied to low-power-consumption environment |
| CN113328504B (en) * | 2021-08-02 | 2021-10-08 | 深圳英集芯科技股份有限公司 | Wireless earphone charging circuit and charging box |
-
2021
- 2021-08-02 CN CN202110880640.6A patent/CN113328504B/en active Active
- 2021-08-02 CN CN202111353535.3A patent/CN115701680A/en active Pending
-
2022
- 2022-07-27 WO PCT/CN2022/108174 patent/WO2023011278A1/en not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107733032A (en) * | 2017-10-30 | 2018-02-23 | 华南理工大学 | A kind of boost type wireless charging receiving circuit |
| US20200127482A1 (en) * | 2018-10-23 | 2020-04-23 | Google Llc | Dynamic Adjustment Of Charging Voltage Supplied From A First Device To A Second Device |
| CN109768606A (en) * | 2019-03-27 | 2019-05-17 | 上海爻火微电子有限公司 | Earphone charging circuit and earphone charging box |
| CN110475171A (en) * | 2019-07-12 | 2019-11-19 | 安克创新科技股份有限公司 | Wireless earphone assembly and earphone case assembly |
| WO2021080982A1 (en) * | 2019-10-25 | 2021-04-29 | Apple Inc. | Closed loop headroom management for battery charging |
| CN211579629U (en) * | 2019-12-24 | 2020-09-25 | 山东康威通信技术股份有限公司 | Constant voltage and constant current charging device applied to low-power-consumption environment |
Non-Patent Citations (1)
| Title |
|---|
| 林俊盛等: "TWS蓝牙耳机多功能充电仓的综合设计", 《单片机与嵌入式应用》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011278A1 (en) * | 2021-08-02 | 2023-02-09 | 深圳英集芯科技股份有限公司 | Wireless earphone charging circuit and charging box |
| WO2023134462A1 (en) * | 2022-01-11 | 2023-07-20 | 荣耀终端有限公司 | Power adapter, and charging system and method |
| CN116470596A (en) * | 2022-01-11 | 2023-07-21 | 荣耀终端有限公司 | Power adapter, charging system and charging method |
| CN116470596B (en) * | 2022-01-11 | 2024-04-05 | 荣耀终端有限公司 | Power adapter, charging system and charging method |
| CN114256941A (en) * | 2022-03-01 | 2022-03-29 | 深圳英集芯科技股份有限公司 | Charging circuit, device and equipment |
| CN114256941B (en) * | 2022-03-01 | 2023-02-28 | 深圳英集芯科技股份有限公司 | Charging circuits, devices and equipment |
| WO2023165300A1 (en) * | 2022-03-01 | 2023-09-07 | 深圳英集芯科技股份有限公司 | Charging circuit, apparatus and device |
| CN114839571A (en) * | 2022-06-30 | 2022-08-02 | 深圳英集芯科技股份有限公司 | Circuits and electronic equipment for detecting equipment plugging and unplugging |
| CN116528105A (en) * | 2023-07-03 | 2023-08-01 | 紫光同芯微电子有限公司 | Self-starting discharging circuit and charging method for earphone charging bin |
| CN116528105B (en) * | 2023-07-03 | 2023-10-13 | 紫光同芯微电子有限公司 | Self-starting discharging circuit and charging method for earphone charging bin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115701680A (en) | 2023-02-10 |
| WO2023011278A1 (en) | 2023-02-09 |
| CN113328504B (en) | 2021-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113328504B (en) | Wireless earphone charging circuit and charging box | |
| US7965058B2 (en) | Charging and power supply for mobile devices | |
| CN110492554B (en) | Adjust control circuit, Bluetooth headset, charging box and charging system | |
| EP2528186A1 (en) | Management device for charging circuit and wireless terminal | |
| CN110970956A (en) | Charging method, electronic device, charging device, and charging system | |
| CN103163928A (en) | Circuit and method for providing a reference signal | |
| CA2632898C (en) | Charging and power supply for mobile devices | |
| US12244166B2 (en) | Charging case | |
| JPH1014127A (en) | Multifunctional battery charger self-aligns as a supply voltage regulator for battery powered devices | |
| US20240381040A1 (en) | Hearing device having a power source | |
| CN105870991A (en) | Equipment, device and method for supporting rapid charging of multiple batteries | |
| CN218158845U (en) | Ramp voltage circuit, soft start circuit thereof, chip and mobile terminal | |
| CN113437784B (en) | Voltage regulation and control circuit and charging device | |
| CN216851374U (en) | Pre-charging circuit and chip | |
| CN107436617A (en) | Energy regulating circuit and operating system | |
| US9007035B2 (en) | Charge control circuit | |
| CN111884276B (en) | A charging system, equipment and charging control method | |
| WO2022236474A1 (en) | Charging device for wearable device and wearable device assembly | |
| CN115765092A (en) | Power management circuit and charging system | |
| CN115022760A (en) | Earphone box circuit, earphone box and earphone charging system | |
| CN113162160A (en) | Control circuit, charging circuit and electronic equipment | |
| JP2023034189A (en) | Charge control circuit, and electronic apparatus | |
| US7511458B2 (en) | Charging apparatus | |
| CN113381478B (en) | Constant power control circuit and method of intelligent power supply and intelligent power supply | |
| CN205610243U (en) | Support equipment and device of quick charge of many batteries |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |