CN210579146U - Low-power consumption circuit and TWS bluetooth headset - Google Patents
Low-power consumption circuit and TWS bluetooth headset Download PDFInfo
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- CN210579146U CN210579146U CN201922091164.0U CN201922091164U CN210579146U CN 210579146 U CN210579146 U CN 210579146U CN 201922091164 U CN201922091164 U CN 201922091164U CN 210579146 U CN210579146 U CN 210579146U
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Abstract
The utility model relates to a low-power consumption circuit and TWS bluetooth headset, this circuit includes: the method comprises the following steps: the charging management unit is used for receiving an external power supply signal, and the first power supply end is connected with the battery; a Bluetooth master control unit; the first switch control circuit is connected between the second power supply end of the charging management unit and the power supply end of the Bluetooth main control unit; the signal end of the second switch control circuit is connected with the control end of the first switch control circuit; the power supply end of the in-box detection unit is connected with the first power supply end, and the output end of the in-box detection unit is connected with the control end of the second switch control circuit; when the box feeding-in signal is fed back, the first switch control circuit disconnects the second power supply end from the power supply end of the Bluetooth main control unit; when the box signal is fed back, the first switch control circuit is connected between the second power supply end and the power supply end of the Bluetooth main control unit. The utility model discloses reduce the consumption when the earphone charges.
Description
Technical Field
The utility model belongs to the technical field of TWS bluetooth headset charges, concretely relates to low-power consumption circuit and TWS bluetooth headset.
Background
When a True Wireless Stereo (TWS) technology is applied to the field of Bluetooth earphones, the TWS Bluetooth earphones are promoted. The working principle of the TWS Bluetooth headset is that a mobile phone is connected with a host computer through Bluetooth, the host computer is connected with a slave computer through a Near Field Magnetic Induction (NFMI) or TWS protocol, when the TWS Bluetooth headset works, music signals on the mobile phone are transmitted to the host computer through Bluetooth, and then the host computer is transmitted to the slave computer through the NFMI or the TWS protocol, so that the left headset and the right headset receive signals.
In the prior art, the TWS bluetooth headset is favored by users due to its characteristics of small size, portability, and the like. The TWS Bluetooth headset is limited by the small size of the TWS Bluetooth headset, the cruising ability of the TWS Bluetooth headset is always a problem related to designers, the TWS Bluetooth headset needs to be charged by a matched charging box, and a charging module needs to be started to charge a headset battery when the charging box detects that the headset is plugged into the box and the electric quantity of the headset battery is not high, so that the plugging detection of the TWS Bluetooth headset and the power consumption of the headset are key points of design.
The existing TWS Bluetooth headset is generally not powered off when being put into a box, and the mode of reducing power consumption comprises the steps of controlling a main control chip to enter a low power consumption mode, a sleep mode and the like, but the mode can not effectively control the stand-by power consumption of the headset.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low-power consumption circuit and TWS bluetooth headset realize going into the thorough outage of bluetooth main control unit under the box-like attitude at TWS bluetooth headset, reduce the consumption when the earphone charges.
In order to solve the technical problem, the utility model provides a following technical scheme solves:
a low power consumption circuit for a TWS Bluetooth headset, comprising: the charging management unit is used for receiving an external power supply signal, and a first power supply end is connected with a battery of the TWS Bluetooth headset; a Bluetooth master control unit; the first switch control circuit is connected between the second power supply end of the charging management unit and the power supply end of the Bluetooth main control unit; the signal end of the second switch control circuit is connected with the control end of the first switch control circuit; the box entering detection unit is used for detecting whether the TWS Bluetooth headset enters the box or not, the power supply end of the box entering detection unit is connected with the first power supply end, and the output end of the box entering detection unit is connected with the control end of the second switch control circuit; when the box entering detection unit feeds back a box signal, the first switch control circuit disconnects the second power supply end from the power supply end of the Bluetooth main control unit; when the box-in detection unit feeds back a box signal, the first switch control circuit is connected between the second power supply end and the power supply end of the Bluetooth main control unit.
As described above, the low power consumption circuit, the in-box detection unit includes: at least one hall sensor disposed within a headset body of the TWS bluetooth headset; at least one magnet which is correspondingly arranged in a charging box matched with the TWS Bluetooth headset; when the TWS Bluetooth headset enters or leaves the box, each Hall sensor senses the magnetic field intensity change of the corresponding magnet and feeds back the box entering signal or the box leaving signal.
The first switch control circuit of the low power consumption circuit comprises a pull-up resistor and a first switch control element, wherein one end of the pull-up resistor is connected between the first power supply end and the input end of the first switch control element, the other end of the pull-up resistor is connected between the control end of the first switch control element and the signal end of the second switch control circuit, and the output end of the first switch control element is connected with the power supply end of the bluetooth main control unit; the second switch control circuit comprises a second switch control element, a signal end of the second switch control element is connected between a control end of the first switch control element and the other end of the pull-up resistor, and a control end of the second switch control element is connected with an output end of the box-in detection unit.
In the low power consumption circuit, the first switching control element is a switching element that is turned on at a low level, and the second switching control element is a switching element that is turned on at a high level.
In the low power consumption circuit, the first switch control element is a PMOS transistor, a drain of the PMOS transistor is connected to a power supply terminal of the bluetooth main control unit, a source of the PMOS transistor is connected between the first power supply terminal and one end of the pull-up resistor, and a gate of the PMOS transistor is connected between the other end of the pull-up resistor and a signal terminal of the second switch control element.
In the low power consumption circuit, the second switch control element is an NMOS transistor, a gate of the NMOS transistor is connected to the output terminal of the box-in detection unit, a source of the NMOS transistor is grounded, and a drain of the NMOS transistor is connected between the control terminal of the first switch control element and the other terminal of the pull-up resistor.
The low power consumption circuit further comprises a first filter circuit connected between the output end of the in-box detection unit and the control end of the second switch control circuit, and/or a second filter circuit connected between the output end of the first switch control circuit and the power supply end of the bluetooth main control unit; and/or a third filter circuit connected between the second power supply end of the charging management unit and the input end of the first switch control circuit.
In the low power consumption circuit, the charging management unit adopts a chip with a signal of MP2661, and the bluetooth main control unit adopts a chip with a model number of BES 2300Z.
In the low-power consumption circuit, the model of the Hall sensor is WH 2503D.
The utility model discloses still relate to a TWS bluetooth headset, include as above the low-power consumption circuit.
Compared with the prior art, the utility model discloses an advantage and beneficial effect are: whether the TWS Bluetooth headset enters the box or not is detected through the box entering detection unit, the box entering detection unit reversely feeds a box signal to the second switch control circuit when the TWS Bluetooth headset enters the box, the second switch control circuit controls the first switch control circuit to be disconnected, the power supply to the Bluetooth main control unit is disconnected, the power supply of the charging management unit and the box entering detection unit is only reserved, the power consumption of the TWS Bluetooth headset when the TWS Bluetooth headset enters the box for charging is reduced, the box entering detection unit feeds back a box signal to the second switch control circuit when the TWS Bluetooth headset exits the box, the second switch control circuit controls the first switch control circuit to be switched on, the power supply to the Bluetooth main control unit is recovered, and the normal work of the TWS Bluetooth headset is ensured.
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 embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of an embodiment of a low power consumption circuit provided by the present invention;
fig. 2 is a circuit diagram of an embodiment of the low power consumption circuit shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
Example one
In order to reduce the power consumption of the TWS Bluetooth headset when the TWS Bluetooth headset enters the box, the charging management unit and the box entering detection unit are only reserved when the TWS Bluetooth headset enters the box, the power supply to the Bluetooth main control unit is closed, and the power supply to the Bluetooth main control unit is recovered when the TWS Bluetooth headset exits the box.
As shown in fig. 1, the present embodiment relates to a low power consumption circuit, which includes a charging management unit 1, a bluetooth main control unit 2, a first switch control circuit 3, a second switch control circuit 4, and a box entering detection unit 5. The charging management unit 1 is a charging and discharging management unit of a battery 6 of the TWS Bluetooth headset, receives the battery voltage of the battery 7, processes the battery voltage, supplies power to the Bluetooth main control unit 2 through a first power supply end by using a signal VSYS, and charges the battery 6 through a second power supply end by using a signal V _ BAT when the TWS Bluetooth headset is put into a box. The box-entering detection unit 5 is used for detecting whether the TWS Bluetooth headset is placed in a charging box or not, outputting a V _ Hall signal to the second switch control circuit 4, and realizing control over a power supply of the Bluetooth main control unit 2 through the first switch control circuit 3 and the second switch control circuit 4; the bluetooth master control unit 2 is a master control chip of the TWS bluetooth headset and is used for signal processing and audio transmission. The charging management unit 1 of the present embodiment adopts a chip with a signal of MP2661, and the bluetooth main control unit 2 adopts a chip with a model number of BES 2300Z.
Before the TWS Bluetooth headset enters the box, the charging management unit 1 processes the battery voltage to supply power to the Bluetooth main control unit 2, so that the Bluetooth main control unit 2 works normally, at the moment, the box entering detection unit 5 keeps outputting a box outputting signal V _ Hall, the second switch control circuit 4 keeps in the first state, and the first switch control circuit 3 is controlled to keep in the conducting state.
When the box entering detection unit 5 detects that the TWS Bluetooth headset enters the box, the box entering detection unit 5 feeds back a box signal V _ Hall, the second switch control circuit 4 is switched from the first state to the second state, and controls the first switch control circuit 3 to be disconnected, at this moment, the power can not be supplied to the Bluetooth main control unit 2 any more, and the power is supplied to the box entering detection unit 5 while the charging management unit 1 is kept for charging the battery 20, so that the power consumption of the headset during charging is reduced, the charging time of the TWS headset is shortened, and the user experience of the user is improved. Of course, it can be easily understood that the above-described manner also includes turning off the power supply of other sensors such as various sensors in addition to the power supply of the charging management unit 1 and the in-box detection unit 5.
When going out the box, go into box detecting element 5 and detect when TWS bluetooth headset goes out the box, go into box detecting element 5 and feed back out box signal V _ Hall, second switch control circuit 4 switches to the first state to control first switch control circuit 3 and switch over to the on-state, bluetooth main control unit 2 can be supplied power this moment.
The states of the units in the circuit when the circuit is completely taken out of the box are the same as the states before the circuit is taken in the box, and the details are not described herein.
Referring to fig. 2, a specific embodiment of the low power circuit of the present invention is shown.
Specifically, the in-box detection unit 5 of the present embodiment includes at least one hall sensor (not shown) and at least one corresponding magnet (not shown). In this embodiment, the hall sensor is disposed in the earphone body of the TWS bluetooth earphone, and the magnet is correspondingly disposed in the charging box matched with the TWS bluetooth earphone. The quantity of the magnets, the positions of the magnets in the charging box, the quantity of the Hall sensors and the positions of the Hall sensors in the earphone body are not limited, so long as the Hall sensors can sense the magnetic flux change of the magnets to reach a trigger threshold value and feed back box-entering signals when entering the box, and the Hall sensors can enable the magnetic flux change of the magnets to be lower than the trigger threshold value and feed back box-exiting signals when exiting the box.
In this embodiment, the first switch control circuit 3 includes a first switch control element and a pull-up resistor R1, and the second switch control circuit 4 includes a second switch control element, where the first switch control element is a low-level conducting switch element, such as a PNP transistor or a PMOS transistor, and the second switch control element is a high-level conducting switch element, such as an NPN transistor or an NMOS transistor. The first switch control device of this embodiment is a PMOS transistor Q1, and the second switch control device of this embodiment is an NMOS transistor Q2. The source electrode of the Q1 tube is connected between the first power supply end of the output signal VSYS of the charging management unit 1 and one end of the pull-up resistor R1, the drain electrode of the Q1 tube is connected with the power supply end of the Bluetooth main control unit 2, the grid electrode of the Q1 tube is connected between the drain electrode of the Q2 tube and the other end of the pull-up resistor R1, the source electrode of the Q2 tube is grounded, and the grid electrode of the Q2 tube is connected with the output end of the Hall sensor.
As shown in fig. 2, a current limiting resistor R2 is further connected between the output end of the Hall sensor and the gate of the Q2 transistor, one end of the current limiting resistor R2 is connected to the output end of the Hall sensor output signal V _ Hall, and the other end of the current limiting resistor R2 is connected to the gate of the Q2 transistor.
According to the specific embodiment of the low power consumption circuit described above, the operation of the low power consumption circuit is described in detail as follows.
(1) When the TWS Bluetooth headset is in a stable state before being placed in a box: because the earphone is not put into the box, Hall sensor does not sense the magnetic field change of magnet, the V _ Hall signal of Hall sensor output this moment is the high level, under stable state, the grid level V _ M2 of Q2 pipe keeps the high level, Q2 pipe is led on, and pull down the grid of Q1 pipe to the low level, make Q1 pipe lead on, the management unit 1 that now charges can handle battery voltage and supply power for bluetooth main control unit 2 through first supply terminal, bluetooth main control unit 2 and subsequent circuit normally work.
(2) When the TWS bluetooth headset is ready to be boxed: the Hall sensor is gradually close to the magnet and senses the change of the magnetic flux of the magnet, and when the change of the magnetic flux reaches a trigger threshold value, the Hall sensor is triggered and feeds back a low-level signal V _ Hall representing that the earphone is put into the box; the grid level of the Q2 pipe is as low as the turn-off voltage of the Q2 pipe, the Q2 pipe is cut off, the grid level of the Q1 pipe is pulled up to VSYS by a pull-up resistor R1, the Q1 pipe is cut off, the charging management unit 1 cannot supply power for the Bluetooth main control unit 2 and subsequent circuits, at the moment, the power consumption of the earphone system is reduced to the minimum value, and only the Hall sensor is in a working state. And after the charging box is put in place, the charging box carries out charging management on the battery 7 through the charging management unit 1, so that the charging function is realized.
In this embodiment, the model selected by the hall sensor is WH2053D, and when the ambient temperature is 25 ℃ and the operating voltage is 3.3V, the average operating circuit is only 5.6 μ a, so that the static power consumption is low, and therefore, the power consumption during charging the earphone is not greatly affected.
After the charging is finished or according to the user's desire, the TWS Bluetooth headset can be taken out of the charging box at any time.
(3) Steady state before out of box: the circuit state in this state is the same as that in (2), namely, the Q1 tube and the Q2 tube are both cut off, the bluetooth master control unit 2 and the subsequent circuits are not powered, and only the hall sensor and the charging source management unit 1 are kept in the working state.
(4) When the box is taken out: when taking out TWS bluetooth headset, the Hall sensor is kept away from magnet gradually, detects the magnetic flux and is less than when triggering the threshold value output high level signal V _ Hall when the Hall sensor, and the grid voltage of Q2 pipe is drawn high gradually, when reaching Q2 pipe turn-on voltage, the Q2 pipe switches on, and V _1G voltage is drawn low to the low level, and the Q1 pipe switches on, and VSYS begins to supply power for bluetooth main control unit 2, and TWS bluetooth headset gets into normal work.
(5) And (4) discharging the box to finish: the circuit state in this state is the same as that in (1), i.e. the Q1 tube and the Q2 tube are both turned on, and power is supplied to the bluetooth master control unit 2 and subsequent circuits.
In order to filter the signal output by the in-box detection unit 5, a first filter circuit is connected between the output terminal of the in-box detection unit 5 and the gate of the Q2 transistor, specifically, the first filter circuit is connected between the other terminal of the current limiting resistor R2 and the gate of the Q2 transistor, and the first filter circuit may be an RC circuit formed by connecting a resistor and a first capacitor in parallel. In order to filter the voltage output by the transistor Q1, a second filter circuit, which may be a second capacitor, is connected between the drain of the transistor Q1 and the power supply terminal of the bluetooth master unit 2, one end of the second capacitor is connected between the drain of the transistor Q1 and the power supply terminal of the bluetooth master unit 2, and the other end of the second capacitor is grounded. And in order to filter the voltage outputted from the second power supply terminal of the charging management unit 1, a third filter circuit, which may be a third capacitor, is connected between the second power supply terminal of the charging management unit 1 and the source of the Q1 transistor, and one end of the third filter circuit is connected between the second power supply terminal and the source of the a1 transistor, and the other end of the third filter circuit is grounded.
The low-power consumption circuit in this embodiment, when the earphone goes into the box and charges, can cut off the power supply with bluetooth main control unit 2 and follow-up circuit, only remain charging management unit 1 and hall sensor, reduce the consumption when charging to the normal power supply work of earphone resumes after going up the power restart when going out the box.
Example two
The utility model discloses still relate to a TWS bluetooth headset, it includes the low-power consumption circuit for when TWS bluetooth headset goes into the box and charges, reduce the consumption, shorten the charge time, and can guarantee TWS bluetooth headset's normal power supply when going out the box. The structure and the working principle of the low power consumption circuit in this embodiment refer to the description of the structure and the working principle of the low power consumption circuit in combination with fig. 1 and fig. 2 in the first embodiment, which are not repeated in this embodiment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A low power consumption circuit for a TWS Bluetooth headset, comprising:
the charging management unit is used for receiving an external power supply signal, and a first power supply end is connected with a battery of the TWS Bluetooth headset;
a Bluetooth master control unit;
the first switch control circuit is connected between the second power supply end of the charging management unit and the power supply end of the Bluetooth main control unit;
the signal end of the second switch control circuit is connected with the control end of the first switch control circuit;
the box entering detection unit is used for detecting whether the TWS Bluetooth headset enters the box or not, the power supply end of the box entering detection unit is connected with the first power supply end, and the output end of the box entering detection unit is connected with the control end of the second switch control circuit;
when the box entering detection unit feeds back a box signal, the first switch control circuit disconnects the second power supply end from the power supply end of the Bluetooth main control unit; when the box-in detection unit feeds back a box signal, the first switch control circuit is connected between the second power supply end and the power supply end of the Bluetooth main control unit.
2. The low power consumption circuit of claim 1, wherein the in-box detection unit comprises:
at least one hall sensor disposed within a headset body of the TWS bluetooth headset;
at least one magnet which is correspondingly arranged in a charging box matched with the TWS Bluetooth headset;
when the TWS Bluetooth headset enters or leaves the box, each Hall sensor senses the magnetic field intensity change of the corresponding magnet and feeds back the box entering signal or the box leaving signal.
3. The low power consumption circuit of claim 1, wherein the first switch control circuit comprises a pull-up resistor and a first switch control element, one end of the pull-up resistor is connected between the first power supply terminal and the input terminal of the first switch control element, the other end of the pull-up resistor is connected between the control terminal of the first switch control element and the signal terminal of the second switch control circuit, and the output terminal of the first switch control element is connected with the power supply terminal of the bluetooth main control unit; the second switch control circuit comprises a second switch control element, a signal end of the second switch control element is connected between a control end of the first switch control element and the other end of the pull-up resistor, and a control end of the second switch control element is connected with an output end of the box-in detection unit.
4. The circuit of claim 3, wherein the first switch control element is a low-level conducting switch element, and the second switch control element is a high-level conducting switch element.
5. The low power consumption circuit of claim 4, wherein the first switch control element is a PMOS transistor, a drain of the PMOS transistor is connected to the power supply terminal of the Bluetooth main control unit, a source of the PMOS transistor is connected between the first power supply terminal and one end of the pull-up resistor, and a gate of the PMOS transistor is connected between the other end of the pull-up resistor and the signal terminal of the second switch control element.
6. The low power consumption circuit of claim 4, wherein the second switch control element is an NMOS transistor, a gate of the NMOS transistor is connected to the output terminal of the in-box detection unit, a source of the NMOS transistor is grounded, and a drain of the NMOS transistor is connected between the control terminal of the first switch control element and the other end of the pull-up resistor.
7. The low power consumption circuit according to any one of claims 1 to 6, wherein the low power consumption circuit further comprises a first filter circuit connected between the output terminal of the in-box detection unit and the control terminal of the second switch control circuit, and/or a second filter circuit connected between the output terminal of the first switch control circuit and the power supply terminal of the Bluetooth main control unit; and/or a third filter circuit connected between the second power supply end of the charging management unit and the input end of the first switch control circuit.
8. The circuit of claim 1, wherein the charging management unit adopts a chip with a signal of MP2661, and the Bluetooth master control unit adopts a chip with a model number BES 2300Z.
9. The low power consumption circuit of claim 2, wherein the hall sensor is of the type WH 2503D.
10. A TWS bluetooth headset comprising a low power consumption circuit as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922091164.0U CN210579146U (en) | 2019-11-28 | 2019-11-28 | Low-power consumption circuit and TWS bluetooth headset |
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| CN201922091164.0U CN210579146U (en) | 2019-11-28 | 2019-11-28 | Low-power consumption circuit and TWS bluetooth headset |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110719543A (en) * | 2019-11-28 | 2020-01-21 | 歌尔科技有限公司 | TWS Bluetooth headset data protection device and method |
| CN114745630A (en) * | 2022-06-09 | 2022-07-12 | 荣耀终端有限公司 | Earphone, earphone system and control method |
-
2019
- 2019-11-28 CN CN201922091164.0U patent/CN210579146U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110719543A (en) * | 2019-11-28 | 2020-01-21 | 歌尔科技有限公司 | TWS Bluetooth headset data protection device and method |
| CN110719543B (en) * | 2019-11-28 | 2021-03-09 | 歌尔科技有限公司 | TWS Bluetooth headset data protection device and method |
| CN114745630A (en) * | 2022-06-09 | 2022-07-12 | 荣耀终端有限公司 | Earphone, earphone system and control method |
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