CN216086972U - Power control circuit, earphone charging box and TWS earphone - Google Patents
Power control circuit, earphone charging box and TWS earphone Download PDFInfo
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- CN216086972U CN216086972U CN202122363642.6U CN202122363642U CN216086972U CN 216086972 U CN216086972 U CN 216086972U CN 202122363642 U CN202122363642 U CN 202122363642U CN 216086972 U CN216086972 U CN 216086972U
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Abstract
The utility model discloses a power supply control circuit, an earphone charging box and a TWS earphone, and relates to the technical field of earphones. The power supply control circuit identifies whether the earphone is placed in the earphone charging box through the identification awakening module, awakens the earphone charging box and sends identification feedback information to the controller, and the controller controls the charging box to perform charging work after receiving the identification feedback signal; meanwhile, a charging current signal of the earphone is detected through the current detection module, the charging current signal is fed back to the controller, and the controller sends out a first control signal to control the on-off of the switch circuit according to the control of the current signal; this application power control circuit can switch on and break off according to the big or small control switch circuit of charging current signal, and then control can automatic switch-over charging source after the earphone is full of the electricity, avoids the TWS earphone unable automatic cutout charging source after being full of the electricity, and the cell-phone is in charged state always and influences battery life and has the problem of potential safety hazard.
Description
Technical Field
The utility model relates to an earphone technical field, in particular to power control circuit, earphone charging box and TWS earphone.
Background
The TWS Bluetooth headset is popular with more and more people due to convenience, the TWS headset needs to be placed into a headset charging box for charging after the electric quantity is used up, the TWS Bluetooth headset is generally charged by directly outputting 5V voltage on the existing market, the situation that the power is consumed in the charging box all the time after the headset is fully charged is easily caused, the charging power cannot be automatically cut off by the power supply after the headset is fully charged, the headset battery is always in a charging state, the service life of an internal battery of the headset can be seriously influenced, and the existing headset cannot be automatically cut off for charging and is always in the charging state after the headset is fully charged, so that the problem of serious potential safety hazard also exists.
SUMMERY OF THE UTILITY MODEL
In view of this, an object of the embodiment of the present invention is to provide a power control circuit, an earphone charging box and a TWS earphone, so as to solve the problem that the above-mentioned existing TWS earphone cannot automatically cut off the charging power supply after being fully charged, and the mobile phone is always in a charging state, which affects the service life of the battery and has a potential safety hazard.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
according to an aspect of an embodiment of the present invention, a power control circuit is provided, which is applied to a bluetooth headset charging and communication process, and includes a power input module, a headset contact end, a controller, an identification wakeup module, a current detection module and a switch circuit, which are connected to each other, wherein the power input module is connected to the headset contact end for charging a headset;
the identification awakening module identifies whether the earphone is placed in the earphone charging box or not, awakens the earphone charging box and sends identification feedback information to the controller, and the controller controls the charging box to perform charging work after receiving the identification feedback signal;
the current detection module detects a charging current signal of the earphone and feeds the charging current signal back to the controller, and the controller receives the current signal and controls the magnitude of the charging current according to the current signal;
the controller also controls to send out a first control signal according to the magnitude of the charging current signal, and controls the on and off of the switch circuit through the first control signal;
and the earphone contact end carries out data transmission communication according to the on-off state of the switch circuit.
The controller comprises a left ear controller and a right ear controller, the left ear earphone contact end and the right ear earphone contact end are respectively connected with the power input module, the left ear controller is connected with the left ear earphone contact end, and the right ear controller is connected with the right ear earphone contact end.
The identification awakening module comprises an identification awakening circuit, the identification awakening circuit comprises a first current-limiting resistor and a triode, one end of the first current-limiting resistor is connected with the earphone contact end, the other end of the first current-limiting resistor is electrically connected with the base electrode of the triode, the collector electrode of the triode is connected with the controller, and the emitter electrode of the triode is grounded.
Wherein, the module is awaken up including left ear awaken up module and right ear awaken up module in discernment, left side ear awaken up the module with the module is awaken up all to include in the right ear discernment awakening circuit, left side ear awakens up the module with the left ear controller is connected, the right ear awakens up the module with the right ear controller is connected.
The switching circuit is an MOS tube, a source electrode of the MOS tube is grounded through a second current-limiting resistor, a drain electrode of the MOS tube is connected with the contact end of the earphone and one end of the first current-limiting resistor, and a grid electrode of the MOS tube is connected with the controller.
The switching circuit comprises a first switching circuit and a second switching circuit, the drain electrode of the MOS tube of the first switching circuit is connected with the contact end of the left ear earphone and one end of the first current-limiting resistor, and the grid electrode of the MOS tube of the first switching circuit is connected with the left ear controller; the drain electrode of the second open circuit MOS tube is connected with the contact end of the right ear earphone and one end of the first current-limiting resistor, and the grid electrode of the second open circuit MOS tube is connected with the right ear controller.
The current detection module comprises a current detection circuit, the current detection circuit comprises a second current-limiting resistor, a third resistor and a filter capacitor connected with the second current-limiting resistor in parallel, one end of the filter capacitor is grounded, the other end of the filter capacitor is connected with one end of the third resistor, the other end of the third resistor is connected with the grid of the MOS tube and one end of the second current-limiting resistor, and the other end of the second current-limiting resistor is grounded.
Wherein, current detection module includes left ear current detection module and right ear current detection module, left ear current detection module and right ear current detection module all include current detection circuit.
According to another aspect of the embodiments of the present invention, there is provided an earphone charging box including the power supply control circuit described above.
According to a further aspect of embodiments of the present invention there is provided a TWS headset including the power control circuit described above.
Compared with the TWS earphone in the prior art, the charging power supply cannot be automatically cut off after the full charge, the mobile phone is always in a charging state, the service life of a battery is influenced, and potential safety hazards exist. The application provides a power supply control circuit, an earphone charging box and a TWS earphone, wherein the power supply control circuit identifies whether the earphone is placed in the earphone charging box or not through an identification awakening module, when the earphone is identified to be placed in the earphone charging box, the earphone charging box is awakened and identification feedback information is sent to a controller, and the controller controls the charging box to perform charging work after receiving the identification feedback signal; meanwhile, detecting a charging current signal of the earphone through the current detection module, and feeding the charging current signal back to the controller, wherein the controller receives the current signal and controls the magnitude of the charging current according to the current signal; the controller also controls to send out a first control signal according to the magnitude of the charging current signal, and controls the on and off of the switch circuit through the first control signal; therefore, the power supply control circuit can control the on and off of the switch circuit according to the magnitude of the charging current signal, and then the charging power supply can be automatically switched after the earphone is fully charged, so that the problems that the service life of a battery is influenced and potential safety hazards exist because the TWS earphone cannot automatically cut off the charging power supply after being fully charged and a mobile phone is always in a charging state are solved.
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 or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of a power control circuit according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of a power control circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a power control circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention clearer and clearer, 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 utility model and are not intended to limit the utility model.
Fig. 1 to fig. 3 are schematic structural diagrams of a power control circuit according to an embodiment of the present invention. Only the portions related to the present embodiment are shown for convenience of explanation.
Example one
Referring to fig. 1 and fig. 2, an embodiment of the present application provides a power control circuit, which is applied to a bluetooth headset charging and communication process. The power control circuit comprises a power input module 10, an earphone contact end 20, a controller 30, an identification awakening module 40, a current detection module 50 and a switch circuit 60 which are connected with each other, wherein the power input module 10 is connected with the earphone contact end 20 and is used for charging the earphone.
The identification awakening module 40 identifies whether the earphone is placed in the earphone charging box, awakens the earphone charging box and sends identification feedback information to the controller 30, and the controller 30 controls the charging box to perform charging work after receiving the identification feedback signal;
the current detection module 50 detects a charging current signal of the earphone and feeds the charging current signal back to the controller 30, and the controller 30 receives the current signal and controls the magnitude of the charging current according to the current signal;
the controller 30 further controls to send a first control signal according to the magnitude of the charging current signal, and controls the switch circuit 60 to be switched on and off through the first control signal;
the earphone contact terminal 20 performs data transmission communication according to the on and off states of the switch circuit 60.
In an embodiment, the earphone contact end 20 includes a left earphone contact end 201 and a right earphone contact end 202, the controller 30 includes a left earphone controller 301 and a right earphone controller 302, the left earphone contact end 301 and the right earphone contact end 302 are respectively connected to the power input module 10, the left earphone controller 301 controls charging and communication of the left earphone contact end 201, and the right earphone controller 302 controls charging and communication of the right earphone contact end 202.
In an embodiment, the identification wake-up module 40 includes a left ear wake-up module 401 and a right ear wake-up module 402, the left ear wake-up module 401 and the right ear wake-up module 402 both include the identification wake-up circuit 403, the left ear wake-up module 401 is connected to the left ear controller 301, and the right ear wake-up module 402 is connected to the right ear controller 302.
Referring to fig. 3, in an embodiment, the identification wake-up circuit 403 of the left ear wake-up module 401 includes a first current-limiting resistor R2 and a transistor Q2, one end of the first current-limiting resistor R2 is connected to the left ear earphone contact J1, the other end of the first current-limiting resistor R2 is electrically connected to the base of the transistor Q2, the collector of the transistor Q2 is connected to the left ear controller 301, and the emitter of the transistor is grounded.
The identification wake-up circuit 403 of the right ear wake-up module 402 includes a first current-limiting resistor R1 and a transistor Q1, one end of the first current-limiting resistor R1 is connected to the right ear earphone contact terminal J2, the other end is electrically connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the right ear controller 302, and the emitter of the transistor Q1 is grounded.
In an embodiment, the switch circuit 60 includes a first switch circuit 601 and a second switch circuit 602, where one end of the first switch circuit 601 is connected to the left ear phone contact terminal 201, one end is connected to the current detection module 50, and the other end is connected to the left ear controller 301, one end of the second switch circuit 602 is connected to the right ear phone contact terminal 202, one end is connected to the current detection module 50, and the other end is connected to the right ear controller 302. In this embodiment, the switch circuit 60 is a MOS transistor, the first switch circuit 601 is a MOS transistor Q3, and the second switch circuit 602 is a MOS transistor Q4.
The drain of the first switching circuit MOS transistor Q3 is connected to the left earphone contact terminal 201 and one end of the first current limiting resistor R2, and the gate of the first switching circuit MOS transistor Q3 is connected to the left ear controller 301; the drain of the second open circuit MOS transistor Q4 is connected to the right ear earphone contact terminal 202 and one end of the first current limiting resistor R1, and the gate of the second open circuit MOS transistor Q2 is connected to the right ear controller 302.
In one embodiment, the current detection module 50 includes a left ear current detection module 501 and a right ear current detection module 502, wherein the left ear current detection module 501 is connected to the left ear controller 301 and the first switch circuit 601; the right ear current detection module 502 is connected to the right ear controller 302 and the second switch circuit 602.
The left ear current detection module 501 and the right ear current detection module 502 both comprise a current detection circuit 503, the current detection circuit 503 comprises a second current-limiting resistor, a third resistor and a filter capacitor connected with the second current-limiting resistor in parallel, one end of the filter capacitor is grounded, the other end of the filter capacitor is connected with one end of the third resistor, the other end of the third resistor is connected with the grid of the MOS transistor and one end of the second current-limiting resistor, and the other end of the second current-limiting resistor is grounded.
In this embodiment, the second current limiting resistor in the current detection circuit 503 of the left ear current detection module 501 is R5, the third resistor is R7, and the filter capacitor is C1; the second current limiting resistor, the third resistor, and the filter capacitor in the current detection circuit 503 of the right ear current detection module 502 are R6, R8, and C2, respectively.
When the power control circuit works, the working process and the principle of the power control circuit are as follows:
when the TWS left earpiece is placed in the charging box:
the positive electrode of a charging direct-current power supply of the power input module 10 passes through a left ear earphone contact end J1 through VCC-5V, one voltage provides an NPN triode Q2 conducting voltage after a resistor R2 is subjected to current limiting, a collector of the triode Q2 is changed into a low level through an emitter of the NPN triode Q2 after the triode Q2 is conducted, the MCU _ INIT _ R-of the left ear controller 301 generates an action from a high level to a low level, the left ear controller 301 recognizes that the TWS left ear earphone is placed in a charging box for charging, and controls the MCU _ EN _ R-of the left ear controller 301 to turn on the MOS tube Q3, VCC-5V passes through the left ear earphone contact end J1, the MOS tube Q3 and the resistor R7 form a formal charging loop, and the left ear earphone enters into formal charging. The charging current detection circuit is formed by the circuit current limiting resistor R7, the resistor R5 and the RC filter of the capacitor C1, is connected to the MCUMCU _ ADC _ R of the left ear controller, and can control the MOS tube Q3 to limit the charging current of the TWS left earphone after being processed by the left ear controller 301. The MOS transistor Q3 is turned off by default when the charging circuit is not in operation through a resistor R4. When the left earphone is not charged, the circuit can be used as an earphone communication function, the left ear controller 301 controls the MCU _ EN _ R to send a high level, the G end of the MOS tube Q3 is controlled to be at the high level, and the MOS tube Q3 is conducted. The left ear controller 301 controls the MCU _ EN _ R to send low level, controls the G end of the MOS transistor Q3 to be low level, and cuts off the MOS transistor Q3. The left earphone on the left earphone contact end J1 can judge the on and off states of the MOS tube Q3 to carry out data transmission communication.
When the TWS right earpiece is placed into the charging box:
the positive electrode of a charging direct-current power supply of the power input module 10 passes through a right-ear earphone contact end J2 through + VCC-5V, one voltage provides an NPN triode Q1 conduction voltage after the R1 resistor is subjected to current limiting, a collector is changed into a low level through an NPN triode emitter after the Q1 conduction, the MCU _ INIT _ L-of the right-ear controller 302 generates an action from a high level to a low level, the right-ear controller 302 recognizes the TWS right-ear earphone and judges that the right-ear earphone is placed in a charging box for charging, the MCU _ EN _ L-of the right-ear controller 302 is controlled to open the MOS tube Q4 when the right-ear controller recognizes that the right-ear earphone is placed in the charging box, VCC-5V passes through the right-ear earphone contact end J2, the MOS tube Q4 and the resistor R8 to form a charging loop, and the right-ear earphone enters into formal charging. The charging current detection circuit is formed by the circuit current limiting resistor R8, the resistor R6 and the RC filter of the capacitor C2 and is connected to the MCU _ ADC _ L of the right ear controller 302, and after the charging current detection circuit is processed by the right ear controller 302, the MOS tube Q4 can be controlled to limit the charging current of the TWS right ear phone. The resistor R3 turns off the MOS transistor Q4 by default when the circuit is not in operation. When the right earphone is not charged, the circuit can be used as an earphone communication function, a high level is sent through the MCU _ EN _ L-of the right earphone controller 302, the G end of the MOS transistor Q4 is controlled to be at a high level, and the MOS transistor Q4 is conducted. And the MCU _ EN _ L-of the right ear controller sends a low level to control the G end of the MOS transistor Q4 to be at the low level, and the MOS transistor Q4 is cut off. The right earphone on the right earphone contact terminal J2 can judge the on and off states of the MOS transistor Q4 to perform data transmission communication.
According to the embodiment of the application, whether the earphone is placed in the earphone charging box or not is recognized through the recognition awakening module, when the earphone is recognized to be placed in the earphone charging box, the earphone charging box is awakened and recognition feedback information is sent to the controller, and the controller controls the charging box to perform charging work after receiving the recognition feedback signal; meanwhile, detecting a charging current signal of the earphone through the current detection module, and feeding the charging current signal back to the controller, wherein the controller receives the current signal and controls the magnitude of the charging current according to the current signal; the controller also controls to send out a first control signal according to the magnitude of the charging current signal, and controls the on and off of the switch circuit through the first control signal; therefore, the power supply control circuit can control the on and off of the switch circuit according to the magnitude of the charging current signal, and then the charging power supply can be automatically switched after the earphone is fully charged, so that the problems that the service life of a battery is influenced and potential safety hazards exist because the TWS earphone cannot automatically cut off the charging power supply after being fully charged and a mobile phone is always in a charging state are solved.
The earphone contact terminal can perform data transmission communication according to the on and off states of the switch circuit, and can serve as a data transmission communication function when the controller controls the on state of the switch circuit, and can serve as a charging function when the controller controls the off state of the switch circuit.
Example two
This application embodiment two still provides an earphone box that charges, the earphone box that charges includes the casing and is used for accomodating the holding tank of earphone, be provided with the circuit board in the earphone box that charges, be provided with power control circuit on the circuit board, power control circuit is as above-mentioned embodiment one, no longer give unnecessary details here.
According to the earphone charging box, the power control circuit is arranged, the identification awakening module of the power control circuit is used for identifying whether the earphone is placed in the earphone charging box or not, when the earphone is identified to be placed in the earphone charging box, the earphone charging box is awakened and identification feedback information is sent to the controller, and the controller receives the identification feedback signal and then controls the charging box to perform charging work; meanwhile, detecting a charging current signal of the earphone through the current detection module, and feeding the charging current signal back to the controller, wherein the controller receives the current signal and controls the magnitude of the charging current according to the current signal; the controller also controls to send out a first control signal according to the magnitude of the charging current signal, and controls the on and off of the switch circuit through the first control signal; therefore, the earphone charging box can control the on and off of the switch circuit according to the charging current signal, and then the charging power supply can be automatically switched after the earphone is fully charged, so that the problems that the service life of a battery is influenced and potential safety hazards exist because the TWS earphone cannot automatically cut off the charging power supply after being fully charged are solved.
EXAMPLE III
The third embodiment of the present application further provides a TWS headset, the TWS headset includes a PCB circuit board therein, the PCB circuit board is provided with the power control circuit, and the power control circuit is as described in the first embodiment and is not described herein again.
According to the TWS earphone, the power supply control circuit is arranged in the TWS earphone, when the TWS earphone is placed in the charging box, the identification awakening module identifies whether the earphone is placed in the earphone charging box, when the fact that the earphone is placed in the earphone charging box is identified, the identification awakening earphone charging box is controlled, identification feedback information is sent to the controller, and the controller receives the identification feedback signal and then controls the charging box to perform charging work; meanwhile, detecting a charging current signal of the earphone through the current detection module, and feeding the charging current signal back to the controller, wherein the controller receives the current signal and controls the magnitude of the charging current according to the current signal; the controller also controls to send out a first control signal according to the magnitude of the charging current signal, and controls the on and off of the switch circuit through the first control signal; therefore, the TWS earphone can control the on and off of the switch circuit according to the magnitude of the charging current signal, and then the charging power supply can be automatically switched after the earphone is fully charged, so that the problems that the service life of a battery is influenced and potential safety hazards exist because the charging power supply cannot be automatically switched off after the TWS earphone is fully charged are solved.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the utility model. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.
Claims (10)
1. A power supply control circuit is applied to the charging and communication processes of a Bluetooth headset and is characterized by comprising a power supply input module, a headset contact end, a controller, an identification awakening module, a current detection module and a switch circuit which are connected with each other, wherein the power supply input module is connected with the headset contact end and is used for charging the headset;
the identification awakening module identifies whether the earphone is placed in the earphone charging box or not, awakens the earphone charging box and sends identification feedback information to the controller, and the controller controls the charging box to perform charging work after receiving the identification feedback information;
the current detection module detects a charging current signal of the earphone and feeds the charging current signal back to the controller, and the controller receives the current signal and controls the magnitude of the charging current according to the current signal;
the controller also controls to send out a first control signal according to the magnitude of the charging current signal, and controls the on and off of the switch circuit through the first control signal;
and the earphone contact end carries out data transmission communication according to the on-off state of the switch circuit.
2. The power control circuit of claim 1, wherein the earphone contact end comprises a left earphone contact end and a right earphone contact end, the controller comprises a left earphone controller and a right earphone controller, the left earphone contact end and the right earphone contact end are respectively connected to the power input module, the left earphone controller is connected to the left earphone contact end, and the right earphone controller is connected to the right earphone contact end.
3. The power control circuit according to claim 2, wherein the identification wake-up module comprises an identification wake-up circuit, the identification wake-up circuit comprises a first current-limiting resistor and a transistor, one end of the first current-limiting resistor is connected to the earphone contact end, the other end of the first current-limiting resistor is electrically connected to a base of the transistor, a collector of the transistor is connected to the controller, and an emitter of the transistor is grounded.
4. The power control circuit of claim 3, wherein the identification wake-up module comprises a left ear wake-up module and a right ear wake-up module, the left ear wake-up module and the right ear wake-up module both comprise the identification wake-up circuit, the left ear wake-up module is connected with the left ear controller, and the right ear wake-up module is connected with the right ear controller.
5. The power control circuit according to claim 2, wherein the switching circuit is a MOS transistor, a source of the MOS transistor is grounded through a second current-limiting resistor, a drain of the MOS transistor is connected to the earphone contact terminal and one end of the first current-limiting resistor, and a gate of the MOS transistor is connected to the controller.
6. The power control circuit according to claim 5, wherein the switch circuit comprises a first switch circuit and a second switch circuit, a drain of the first switch circuit MOS transistor is connected to the contact end of the left earphone and one end of a first current limiting resistor, and a gate of the first switch circuit MOS transistor is connected to the left earphone controller; the drain electrode of the second open circuit MOS tube is connected with the contact end of the right ear earphone and one end of the first current-limiting resistor, and the grid electrode of the second open circuit MOS tube is connected with the right ear controller.
7. The power control circuit according to claim 5, wherein the current detection module includes a current detection circuit, the current detection circuit includes a second current limiting resistor, a third resistor, and a filter capacitor connected in parallel with the second current limiting resistor, one end of the filter capacitor is grounded, the other end of the filter capacitor is connected to one end of the third resistor, the other end of the third resistor is connected to the gate of the MOS transistor and one end of the second current limiting resistor, and the other end of the second current limiting resistor is grounded.
8. The power control circuit of claim 7, wherein the current detection module comprises a left ear current detection module and a right ear current detection module, each of which comprises the current detection circuit.
9. A headset charging box, characterized in that it comprises a power supply control circuit according to any one of claims 1-8.
10. A TWS headset comprising a power control circuit as claimed in any one of claims 1 to 8.
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| CN202122363642.6U CN216086972U (en) | 2021-09-28 | 2021-09-28 | Power control circuit, earphone charging box and TWS earphone |
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| CN202122363642.6U CN216086972U (en) | 2021-09-28 | 2021-09-28 | Power control circuit, earphone charging box and TWS earphone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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