CN213367459U - Charging circuit, earphone box and earphone - Google Patents
Charging circuit, earphone box and earphone Download PDFInfo
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- CN213367459U CN213367459U CN202022423199.2U CN202022423199U CN213367459U CN 213367459 U CN213367459 U CN 213367459U CN 202022423199 U CN202022423199 U CN 202022423199U CN 213367459 U CN213367459 U CN 213367459U
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Abstract
The embodiment of the application provides a charging circuit, an earphone box and an earphone. The charging circuit includes an input terminal and an output terminal. A voltage adjusting circuit and a control module are arranged between the voltage input end and the voltage output end. The voltage adjusting circuit is respectively electrically connected with the voltage input end, the voltage output end and the control module, the control module is respectively electrically connected with the voltage input end and the voltage output end, and the control module is used for acquiring the voltage of the voltage input end and the voltage of the voltage output end. In the embodiment of the application, the control module can boost, stabilize or reduce the voltage of the charging circuit through the control voltage adjusting circuit, that is, the control module controls the voltage adjusting circuit to adjust the voltage output by the voltage output end, so that the voltage of the voltage output end can satisfy the voltage charged by the device to be charged, and the charging efficiency of the charging circuit is improved.
Description
Technical Field
The application relates to the technical field of communication, concretely relates to charging circuit, earphone box and earphone.
Background
At present, in the process of using the electronic device, a wireless headset is generally required, and the wireless headset is generally required to be charged through a headset box.
In the related art, a charging circuit is usually arranged in an earphone box, the charging circuit is a voltage boosting circuit, a voltage reducing circuit is arranged in an earphone, when the earphone is charged through the earphone box, the voltage in the earphone box is increased, the increased voltage is transmitted to the earphone, the voltage reducing circuit in the earphone reduces the voltage, and then the reduced voltage is transmitted to a battery of the earphone to charge the battery.
In the process of implementing the present application, the inventors found that at least the following problems exist in the related art: in the process of charging to the earphone through the earphone box, the voltage of charging circuit's voltage input end may be higher, and after the charging circuit again steps up, the voltage that transmits to in the earphone is higher, and this voltage probably can not satisfy the voltage of earphone demand, and the earphone needs step down to this voltage, leads to the charge efficiency through charging circuit to be lower.
Content of application
The embodiment of the application provides an electronic device, which can solve the problem that the voltage input by a voltage input end of a charging circuit in the related art is boosted and then reduced, and finally transmitted to a battery of an earphone, so that the voltage is greatly lost in the transmission process, and the charging efficiency is low.
In order to solve the technical problem, the present application is implemented as follows:
in a first aspect, an embodiment of the present application provides a charging circuit, which includes a voltage input terminal and a voltage output terminal;
a voltage adjusting circuit and a control module are arranged between the voltage input end and the voltage output end;
the voltage adjusting circuit is respectively electrically connected with the voltage input end, the voltage output end and the control module, the control module is respectively electrically connected with the voltage input end and the voltage output end, and the control module is used for acquiring the voltage of the voltage input end and the voltage of the voltage output end;
when the voltage of the voltage input end is greater than the target voltage, the control module controls the voltage adjusting circuit to be in a voltage reduction state, so that the voltage output by the voltage output end is equal to the target voltage;
under the condition that the voltage of the voltage input end is equal to the target voltage, the control module controls the voltage adjusting circuit to be in a voltage stabilization state, so that the voltage output by the voltage output end is equal to the target voltage;
under the condition that the voltage of the voltage input end is smaller than the target voltage, the control module controls the voltage adjusting circuit to be in a boosting state so that the voltage output by the voltage output end is equal to the target voltage;
the voltage output by the voltage output end is the voltage for charging the device to be charged.
In a second aspect, an embodiment of the present application provides an earphone box, where the earphone box includes a housing, an earphone box battery, a first contact spring, and the charging circuit in the first aspect;
the earphone box battery is electrically connected with a voltage input end in the charging circuit, the earphone box battery is grounded, the first contact elastic sheet is electrically connected with the voltage output end in the charging circuit, and the first contact elastic sheet is grounded;
the earphone box battery, the contact elastic sheet and the charging circuit are all arranged in the shell.
In a third aspect, an embodiment of the present application provides an earphone, which is connected to the earphone box in the second aspect, where the earphone includes an earphone shell, a second contact spring, a direct charging circuit, a control unit, and an earphone battery;
the control unit and the direct charging circuit are both electrically connected with the second contact elastic sheet, and the second contact elastic sheet is grounded;
the control unit is electrically connected with the direct charging circuit, the direct charging circuit is electrically connected with the earphone battery, and the earphone battery is grounded;
the second contact elastic sheet, the direct charging circuit, the control unit and the earphone battery are all arranged in the earphone shell.
In this embodiment, since the control module is electrically connected to the voltage input terminal and the voltage output terminal, the control module can obtain the voltage of the voltage input terminal and the voltage of the voltage output terminal. Because the voltage adjusting circuit is respectively electrically connected with the voltage input end, the voltage output end and the control module, after the control module acquires the voltage of the voltage input end and the voltage of the voltage output end, the control module can control the voltage adjusting circuit according to the voltage of the voltage input end and the voltage of the voltage output end, so that the voltage adjusting circuit can adjust the voltage output by the voltage output end, namely under the condition that the voltage of the voltage input end is greater than the target voltage, the control module controls the voltage adjusting circuit to be in a voltage reduction state, so that the voltage output by the voltage output end is equal to the target voltage; under the condition that the voltage of the voltage input end is equal to the target voltage, the control module controls the voltage adjusting circuit to be in a voltage stabilizing state so that the voltage output by the voltage output end is equal to the target voltage; and under the condition that the voltage of the voltage input end is less than the target voltage, the control module controls the voltage adjusting circuit to be in a boosting state so as to enable the voltage output by the voltage output end to be equal to the target voltage. That is, in the embodiment of the application, the control module can boost, stabilize or step down the voltage in the charging circuit through the control voltage adjusting circuit, that is, the control module controls the voltage adjusting circuit to adjust the voltage output by the voltage output end, so that the voltage of the voltage output end can satisfy the voltage charged by the device to be charged, and the charging efficiency of the charging circuit is improved.
Drawings
Fig. 1 is a schematic diagram of a charging circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an earphone box according to an embodiment of the present disclosure;
fig. 3 shows a schematic diagram of an earphone according to an embodiment of the present application.
Reference numerals:
10: a voltage input terminal; 20: a voltage output terminal; 30: a voltage regulation circuit; 40: a control module; 50: a second capacitor; 31: a first switch assembly; 32: a second switch assembly; 33: a third switch assembly; 34: a fourth switching component; 35: an inductance; 36: a first capacitor; 100: an earphone box battery; 200: a first contact spring; 201: a first contact; 300: a second contact dome; 301: a second contact; 400: a direct charging circuit; 500: a control unit; 600: a battery for the earphone.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Referring to fig. 1, a schematic diagram of a charging circuit provided in an embodiment of the present application is shown. As shown in fig. 1, the charging circuit includes an input terminal and an output terminal.
A voltage adjusting circuit 30 and a control module 40 are disposed between the voltage input terminal 10 and the voltage output terminal 20. The voltage adjusting circuit 30 is electrically connected to the voltage input terminal 10, the voltage output terminal 20, and the control module 40, the control module 40 is electrically connected to the voltage input terminal 10 and the voltage output terminal 20, and the control module 40 is configured to obtain a voltage of the voltage input terminal 10 and a voltage of the voltage output terminal 20.
Under the condition that the voltage of the voltage input end 10 is greater than the target voltage, the control module 40 controls the voltage adjusting circuit 30 to be in a voltage reduction state, so that the voltage output by the voltage output end 20 is equal to the target voltage; in the case that the voltage at the voltage input terminal 10 is equal to the target voltage, the control module 40 controls the voltage adjusting circuit 30 to be in a voltage stabilizing state, so that the voltage output by the voltage output terminal 20 is equal to the target voltage; under the condition that the voltage of the voltage input end 10 is smaller than the target voltage, the control module 40 controls the voltage adjusting circuit 30 to be in a boosting state, so that the voltage output by the voltage output end 20 is equal to the target voltage; the voltage output from the voltage output terminal 20 is a voltage for charging the device to be charged.
In the embodiment of the present application, since the control module 40 is electrically connected to the voltage input terminal 10 and the voltage output terminal 20, respectively, the control module 40 can obtain the voltage of the voltage input terminal 10 and the voltage of the voltage output terminal 20. Since the voltage adjusting circuit 30 is electrically connected to the voltage input terminal 10, the voltage output terminal 20, and the control module 40, after the control module 40 obtains the voltage of the voltage input terminal 10 and the voltage of the voltage output terminal 20, the control module 40 may control the voltage adjusting circuit 30 according to the voltage of the voltage input terminal 10 and the voltage of the voltage output terminal 20, so that the voltage adjusting circuit 30 may adjust the voltage output by the voltage output terminal 20, that is, under the condition that the voltage of the voltage input terminal 10 is greater than the target voltage, the control module 40 controls the voltage adjusting circuit 30 to be in a step-down state, so that the voltage output by the voltage output terminal 20 is equal to the target voltage; in the case that the voltage at the voltage input terminal 10 is equal to the target voltage, the control module 40 controls the voltage adjusting circuit 30 to be in a voltage stabilizing state, so that the voltage output by the voltage output terminal 20 is equal to the target voltage; in the case that the voltage at the voltage input terminal 10 is less than the target voltage, the control module 40 controls the voltage adjusting circuit 30 to be in a boosting state so that the voltage output by the voltage output terminal 20 is equal to the target voltage. That is, in the embodiment of the present application, the control module 40 may boost, stabilize or reduce the voltage in the charging circuit by controlling the voltage adjusting circuit 30, that is, the control module 40 controls the voltage adjusting circuit 30 to adjust the voltage output by the voltage output terminal 20, so that the voltage of the voltage output terminal 20 may satisfy the voltage for charging the device to be charged, and the charging efficiency of the charging circuit is improved.
In addition, in this application embodiment, after using the charging circuit that this application embodiment provided in the earphone box, the voltage of earphone charging can be satisfied to the voltage of earphone output in the earphone box, can directly charge the earphone, avoids setting up step-down circuit in the earphone, can also practice thrift the cost.
It should be noted that, in the embodiment of the present application, the target voltage may be the sum of the voltage at the voltage output terminal 20 and a preset voltage, and the target voltage may be a voltage that satisfies the charging requirement of the device to be charged. The preset voltage can be determined according to actual requirements.
For example, as shown in FIG. 1, the voltage input terminal may be VIN, and the voltage of VIN may be UiThe voltage output end can be VOUT, and the voltage of VOUT can be UoThe preset voltage may be δ, and when the voltage at the voltage input terminal is greater than the target voltage, U is the voltage at the voltage input terminali>Uo+ delta, the control module can control the voltage adjusting circuit to be in the step-down mode, so that the voltage output by the voltage output end can be Uo+ δ. When the voltage at the voltage input is equal to the target voltage, i.e. Ui＝Uo+ delta, the control module can control the voltage regulation circuit to be in a voltage stabilization mode, so that the voltage output by the voltage output end can be Uo+ δ. When the voltage at the voltage input terminal is less than the target voltage, i.e. Ui<Uo+ delta, the control module can control the voltage regulation circuit to be in a voltage stabilization mode, so that the voltage output by the voltage output end can be Uo+δ。
In addition, in the embodiment of the present application, as shown in fig. 1, the voltage adjustment circuit 30 may include: a first switching component 31, a second switching component 32, a third switching component 33, a fourth switching component 34, an inductor 35 and a first capacitor 36.
The first switch assembly 31 is electrically connected to the voltage input terminal 10 and the inductor 35, the inductor 35 is electrically connected to the second switch assembly 32, and the second switch assembly 32 is electrically connected to the voltage output terminal 20. The third switching element 33 is electrically connected to the first terminal of the inductor 35, the third switching element 33 is grounded, the fourth switching element 34 is connected to the second terminal of the inductor 35, the fourth switching element 34 is grounded, the first capacitor 36 is connected to the second switching element 32, and the first capacitor 36 is grounded.
The first switch assembly 31, the second switch assembly 32, the third switch assembly 33 and the fourth switch assembly 34 are electrically connected to the control module 40.
Since the first switch assembly 31 is electrically connected to the voltage input terminal 10 and the inductor 35, respectively, after the voltage is applied to the voltage input terminal 10, the current can be transferred to the inductor 35 through the first switch assembly 31. Since the inductor 35 is electrically connected to the second switch assembly 32 and the second switch assembly 32 is electrically connected to the voltage output terminal 20, the current in the inductor 35 is transmitted to the voltage output terminal 20 through the second switch assembly 32. Since the third switching element 33 is electrically connected to the first end of the inductor 35 and the third switching element 33 is grounded, the current in the inductor 35 can be continuously transmitted through the third switching element 33, so that the inductor 35 and the third switching element 33 can still form a loop when the first switching element 31 is in the off state. Since the fourth switching component 34 is connected to the second end of the inductor 35, and the fourth switching component 34 is grounded, the current in the inductor 35 can continue to be transferred through the fourth switching component 34, so that the inductor 35 and the fourth switching component 34 can still form a loop when the second switching component 32 is in the off state. Since the first capacitor 36 is connected between the second switch element 32 and the voltage output terminal 20, a current can flow through the second switch element 32 to the first capacitor 36, charging the first capacitor 36. Since the first switch assembly 31, the second switch assembly 32, the third switch assembly 33 and the fourth switch assembly 34 are all electrically connected to the control module 40, the control module 40 can control the first switch assembly 31, the second switch assembly 32, the third switch assembly 33 and the fourth switch assembly 34 respectively.
Since the control module 40 can control the first switch module 31, the second switch module 32, the third switch module 33, and the fourth switch module 34 respectively, the control module 40 can control the first switch module 31, the second switch module 32, the third switch module 33, and the fourth switch module 34 to be in different states according to the voltage of the voltage input terminal 10 and the target voltage, and specifically, the following forms can be provided:
(1) in the case that the voltage at the voltage input terminal 10 is greater than the target voltage, the control module 40 controls the second switching component 32 to be in the on state, controls the fourth switching component 34 to be in the off state, and controls the first switching component 31 and the third switching component 33 to be in the on state alternately until the voltage output by the voltage output terminal 20 is equal to the target voltage.
When the control module 40 controls the second switching element 32 to be in a conducting state, controls the fourth switching element 34 to be in a disconnecting state, and controls the first switching element 31 and the third switching element 33 to be in a conducting state alternately, at this time, the voltage adjusting circuit 30 is in a voltage reduction state.
It should be noted that, controlling the first switching component 31 and the third switching component 33 to be in the on state alternately means controlling the third switching component 33 to be in the off state when the first switching component 31 is controlled to be in the on state, and then controlling the first switching component 31 to be in the off state and controlling the third switching component 33 to be in the on state, and sequentially circulating.
The step-down state of the voltage regulation circuit is described in detail with reference to fig. 1, where the voltage at the voltage input terminal 10 is U as shown in fig. 1iThe voltage at the voltage output terminal 20 is UoWhen the second switch element 32 is in the on state, the fourth switch element 34 is in the off state, and the first switch element 31 and the third switch element 33 are in the on state alternately, if the first switch element 31 is in the on state and the third switch element 33 is in the off state, the current will flow through the inductor 35, and the voltage U is generated on the inductor 35LAt this time, according to kirchhoff's voltage law, the following can be obtained:
Ui-UL-Uo＝0
while
This gives:
namely: l Δ IL＝(Ui-Uo)*Δt。
Where L is inductance of the inductor, and Δ T is a time for the first switching element to be turned on, so Δ T is T × D, T is an operation period of the first switching element 33, and D is a turn-on duty ratio, that is, a ratio of a turn-on duration to a total duration of the period in one operation period. This gives:
L*ΔIL＝(Ui-Uo)*T*D (a)
if the first switching element 31 is in the off state, the third switching element 33And in a conducting state, according to kirchhoff's voltage law, the following can be obtained: u shapeL-Uo0. Namely:
this gives:
L*ΔIL＝Uo*T*(1-D) (b)
combining the above (a) and (b) to obtain: u shapeo＝UiD, namely:
from the above (c), the voltage at the voltage output terminal 10 is UoVoltage U less than or equal to voltage input terminal 20iTherefore, when the control module 40 controls the second switching element 32 to be in the on state, controls the fourth switching element 34 to be in the off state, controls the first switching element 31 and the third switching element 33 to be in the on state alternately, and controls the voltage adjusting circuit 30 to be in the step-down state.
(2) When the voltage of the voltage input terminal 10 is equal to the target voltage, the control module 40 controls the first switching element 31 and the second switching element 32 to be in the on state, and controls the third switching element 33 and the fourth switching element 34 to be in the off state.
When the control module 40 controls the first switch element 31 and the second switch element 32 to be in the on state and the third switch element 33 and the fourth switch element 34 to be in the off state, the voltage regulating circuit 30 is in the voltage stabilizing state.
The regulated state of the voltage regulation circuit 30 is described in detail with reference to fig. 1, in which the voltage at the voltage input terminal 10 is U as shown in fig. 1iThe voltage at the voltage output terminal 20 is UoWhen the first switch element 31 and the second switch element 32 are both in the on state and the third switch element 33 and the fourth switch element 34 are both in the off state, the inductor 35 may be equivalent to a conducting wire, so that the voltage at the voltage output terminal 20 is equal to the voltage at the voltage input terminal 10, and the voltage adjusting circuit 30 is in the voltage stabilizing state.
(3) In the case that the voltage at the voltage input terminal 10 is less than the target voltage, the control module 40 controls the first switching element 31 to be in a conducting state, controls the third switching element 33 to be in a disconnecting state, and controls the second switching element 32 and the fourth switching element 34 to be in a conducting state alternately until the voltage output by the voltage output terminal 20 is equal to the target voltage.
When the control module 40 controls the first switching element 31 to be in a conducting state, controls the third switching element 33 to be in a disconnecting state, and controls the second switching element 32 and the fourth switching element 34 to be in a conducting state alternately, at this time, the voltage regulating circuit 30 is in a boosting state.
It should be noted that, controlling the second switch component 32 and the fourth switch component 34 to be in the on state alternately means that, when the second switch component 32 is controlled to be in the on state, the fourth switch component 34 is controlled to be in the off state, and then, the second switch component 32 is controlled to be in the off state, and the fourth switch component 34 is controlled to be in the on state, which are cycled sequentially.
The boosting state of the voltage regulation circuit 30 is described in detail with reference to fig. 1, in which the voltage at the voltage input terminal 10 is U as shown in fig. 1iThe voltage at the voltage output terminal 20 is UoWhen the first switch element 31 is in the on state, the third switch element 33 is in the off state, and the second switch element 32 and the fourth switch element 34 are in the on state alternately, if the second switch element 32 is in the off state and the fourth switch element 34 is in the on state, the current flows into the inductor 35 from the voltage input terminal 10, the energy is stored on the inductor 35, and meanwhile, the first capacitor 36 provides the voltage to the voltage output terminal 20. Suppose the fourth switching component 34 is turned on for a time period tonThe energy stored in the inductor 35 is UiIton. If the second switching element 32 is in the on state and the fourth switching element 34 is in the off state, the voltage input from the voltage input terminal 10 and the energy stored in the inductor 35 simultaneously charge the first capacitor 36 and simultaneously supply the voltage to the voltage output terminal 20. Suppose the fourth switching assembly 34 is off for a period of time toffThen the energy released on the inductor 35 during the turn-off of the fourth switching component 34 is (U)o-Ui)Itoff. In thatDuring the operating period T of the fourth switching assembly 34, the inductor 35 stores the same energy as the released energy, i.e.: u shapeiIton＝(Uo-Ui)Itoff。
This gives:
in the above-mentioned (d), the resin composition,
thus, the voltage at the voltage output terminal 10 is UoVoltage U equal to or greater than voltage input terminal 20i。
Therefore, when the control module 40 controls the first switching element 31 to be in the on state, controls the third switching element 33 to be in the off state, controls the second switching element 32 and the fourth switching element 34 to be in the on state alternately, and controls the voltage regulating circuit 30 to be in the boost state.
In addition, in the embodiment of the present application, the first switch component 31 is electrically connected to the voltage input terminal 10 and the inductor 35, the inductor 35 is electrically connected to the second switch component 32, and the connection manner of the second switch component 32 and the voltage output terminal 20 may be: the first switch module 31 may include a first connection end electrically connected to the voltage input terminal 10, a second connection end electrically connected to the inductor 35, the inductor 35 electrically connected to the third connection end, and a fourth connection end electrically connected to the voltage output terminal 20.
In addition, in this embodiment of the application, the connection manner of the third switching component 33 connected to the first end of the inductor 35, the grounding of the third switching component 33, the connection manner of the fourth switching component 34 connected to the second end of the inductor 35, and the grounding of the fourth switching component 34 may be: the third switching module 33 may include a fifth connection terminal and a sixth connection terminal, the fourth switching module 34 may include a seventh connection terminal and an eighth connection terminal, the fifth connection terminal is connected to the first terminal of the inductor 35, the sixth connection terminal is grounded, the seventh connection terminal is connected to the second terminal of the inductor 35, and the eighth connection terminal is grounded. At this time, the first terminal of the first capacitor 36 is connected to the fourth connection terminal, and the second terminal of the first capacitor 36 is grounded.
In addition, in the embodiment of the present application, the connection manner of the first switch assembly 31, the second switch assembly 32, the third switch assembly 33, and the fourth switch assembly 34 electrically connected to the control module 40 may be as follows: the first switch assembly 31 may further include a first control terminal, the second switch assembly 32 may further include a second control terminal, the third switch assembly 33 may further include a third control terminal, and the fourth switch assembly 34 may further include a fourth control terminal, wherein the first control terminal, the second control terminal, the third control terminal, and the fourth control terminal are electrically connected to the control module 40.
In addition, in this embodiment, if the first switch component 31 is in the on state, the control module 40 may further obtain the voltage of the voltage input terminal 10 and the voltage of the third switch component 33, and further determine the current in the charging circuit according to the voltage of the voltage input terminal 10, the voltage of the third switch component 33, and the on-resistance of the first switch component 31, and if the current in the charging circuit is not equal to the target current, adjust the current in the charging circuit so that the current in the charging circuit is equal to the target current. Wherein the target current is the current required by the device to be charged.
It should be noted that, in the embodiment of the present application, each of the first switch element 31, the second switch element 32, the third switch element 33 and the fourth switch element 34 may include at least one of a Transistor, a load switch and a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).
For example, as shown in fig. 1, when the first switch device 31, the second switch device 32, the third switch device 33 and the fourth switch device 34 are all MOSFET devices, at this time, the source of the first switch device 31 may be a first connection end, the source is electrically connected to the voltage input end 10, the drain of the first switch device 31 may be a second connection end, the drain is electrically connected to the first end of the inductor 35, the gate of the first switch device 31 may be a first control end, and the gate is electrically connected to the control module 40; the source of the second switch element 32 may be a third connection end, the source is electrically connected to the second end of the inductor 35, the drain of the second switch element 32 may be a fourth connection end, the drain is electrically connected to the voltage output end 20, and the gate of the second switch element 32 may be a second control end, the gate is electrically connected to the control module 40; the drain of the third switching control element 33 may be a fifth connection terminal, the drain is electrically connected to the first terminal of the inductor 35, the source of the third switching element 33 may be a sixth connection terminal, the source is grounded, the gate of the third switching element 33 may be a third control terminal, and the gate is electrically connected to the control module 40; the drain of the fourth switching element 34 may be a seventh connection terminal, the drain is electrically connected to the second terminal of the inductor 35, the source of the fourth switching element 34 may be an eighth connection terminal, the source is grounded, and the gate of the fourth switching element 34 may be a fourth control terminal, the gate is electrically connected to the control module 40.
In addition, in some embodiments, the voltage input terminal 10 and the voltage output terminal 20 are further provided with a second capacitor 50, a first end of the second capacitor 50 is connected to the voltage adjusting circuit 30, a second end of the second capacitor 50 is connected to ground, and the second capacitor 50 is used for storing the electric energy at the voltage input terminal 10 so as to enable the electric energy to be transmitted to the voltage output terminal 20.
When the first terminal of the second capacitor 50 is connected to the voltage adjusting circuit 30 and the second terminal of the second capacitor 50 is grounded, when a voltage is input to the voltage input terminal 10, a current may flow to the second capacitor 50 to charge the second capacitor 50, the second capacitor 50 may store the electric energy, and then the stored electric energy may be transmitted to the voltage output terminal 20 through the voltage adjusting circuit 30. That is, by providing the second capacitor 50, it is possible to store electric energy.
In addition, in some embodiments, the control module 40 may include a voltage obtaining device electrically connected to the voltage input terminal 10 and the voltage output terminal 20 respectively, and the voltage obtaining device is configured to obtain the voltage of the voltage input terminal 10 and the voltage of the voltage output terminal 20. That is, the voltage acquisition device is provided in the control module 40, and the voltage of the voltage input terminal 10 and the voltage of the voltage output terminal 20 are acquired by the voltage acquisition device, so that the control module 40 can conveniently acquire the voltage of the voltage input terminal 10 and the voltage of the voltage output terminal 20.
It should be noted that, in the embodiment of the present application, the voltage obtaining device may be an Analog to Digital Converter (ADC), and of course, the voltage obtaining device may also be other devices, and the embodiment of the present application is not limited herein.
In this embodiment, since the control module is electrically connected to the voltage input terminal and the voltage output terminal, the control module can obtain the voltage of the voltage input terminal and the voltage of the voltage output terminal. Because the voltage adjusting circuit is respectively electrically connected with the voltage input end, the voltage output end and the control module, after the control module acquires the voltage of the voltage input end and the voltage of the voltage output end, the control module can control the voltage adjusting circuit according to the voltage of the voltage input end and the voltage of the voltage output end, so that the voltage adjusting circuit can adjust the voltage output by the voltage output end, namely under the condition that the voltage of the voltage input end is greater than the target voltage, the control module controls the voltage adjusting circuit to be in a voltage reduction state, so that the voltage output by the voltage output end is equal to the target voltage; under the condition that the voltage of the voltage input end is equal to the target voltage, the control module controls the voltage adjusting circuit to be in a voltage stabilizing state so that the voltage output by the voltage output end is equal to the target voltage; and under the condition that the voltage of the voltage input end is less than the target voltage, the control module controls the voltage adjusting circuit to be in a boosting state so as to enable the voltage output by the voltage output end to be equal to the target voltage. That is, in the embodiment of the application, the control module can boost, stabilize or step down the voltage in the charging circuit through the control voltage adjusting circuit, that is, the control module controls the voltage adjusting circuit to adjust the voltage output by the voltage output end, so that the voltage of the voltage output end can satisfy the voltage charged by the device to be charged, and the charging efficiency of the charging circuit is improved.
Referring to fig. 2, a schematic diagram of an earphone box provided in the present embodiment is shown, and as shown in fig. 2, the earphone box includes a housing, an earphone box battery 100, a first contact spring 200, and a charging circuit in any embodiment of the foregoing embodiments.
The earphone box battery 100 is electrically connected with a voltage input terminal 10 in the charging circuit, the earphone box battery 100 is grounded, the first contact spring sheet 200 is electrically connected with a voltage output terminal 20 in the charging circuit, and the first contact spring sheet 200 is grounded. The earphone box battery 100, the contact spring and the charging circuit are all disposed in the housing.
In the embodiment of the present application, since the earphone box battery 100 is electrically connected to the voltage input terminal 10 in the charging circuit, the earphone box battery 100 can input voltage to the voltage input terminal 10. Since the first contact dome 200 is electrically connected to the voltage output terminal 20 in the charging circuit, the voltage of the voltage output terminal 20 can be transmitted to a device to be charged, such as an earphone, through the first contact dome 200. That is, in this embodiment of the application, the battery 100 of the earphone box can input voltage to the voltage input terminal 10, and then the control module 40 in the charging circuit can boost, stabilize or step down the voltage in the charging circuit through the control voltage adjusting circuit 30, that is, the control module 40 controls the voltage adjusting circuit 30 to adjust the voltage output by the voltage output terminal 20, so that the voltage of the voltage output terminal 20 can satisfy the voltage charged by the device to be charged, and the voltage is transmitted to the device to be charged through the first contact elastic sheet 200, thereby the charging efficiency of the earphone box can be achieved.
In addition, in the embodiment of the present application, as shown in fig. 2, a first contact 201 may be further disposed in the first contact spring 200, and the first contact 201 is electrically connected to the control module 40 in the charging circuit.
When the first contact spring sheet 200 is provided with the first contact 201, and the first contact 201 is electrically connected with the control module 40 in the charging circuit, when the earphone is charged through the earphone box, the earphone is in contact with the first spring sheet and is in contact with the first contact 201, the control module 40 can acquire the voltage required by the earphone through the first contact 201, namely, the target voltage, at this time, the control module 40 can also acquire the voltage of the voltage input end 10 in the charging circuit, and according to the relation between the voltage of the voltage input end 10 and the target voltage, the voltage of the voltage output end 20 is adjusted by the voltage adjusting circuit 30 in the charging circuit, so that the voltage of the voltage output end 20 meets the voltage required by the earphone. That is, through setting up first contact 201, when charging to the earphone through the earphone box, control module 40 can acquire the voltage of earphone demand in real time, and then control voltage regulating circuit 30 adjusts the voltage of voltage output end 20 for the voltage of earphone box output satisfies the voltage of earphone demand, and then can improve the charge efficiency of earphone box.
For example, when the earphone is charged by the earphone box, if the voltage required by the earphone box is 4 volts and the voltage required by the control module 40 to the voltage input terminal 10 of the charging circuit is 6 volts, the control module 40 controls the voltage adjusting circuit 30 to adjust the voltage in the charging circuit, so that the charging circuit is in a step-down state and the voltage output by the earphone box is 4 volts. If the voltage required by the earphone box is 4 volts and the voltage required by the control module 40 is 4 volts, the control module 40 controls the voltage adjusting circuit 30 to adjust the charging circuit, so that the charging circuit is in a voltage stabilizing state and the voltage output by the earphone box is 4 volts. If the voltage required by the earphone box is 4 volts and the voltage required by the control module 40 by the earphone box is 3 volts, the control module 40 controls the voltage adjusting circuit 30 to adjust the voltage in the charging circuit, so that the charging circuit is in a boosting state and the voltage output by the earphone box is 4 volts.
In addition, in the embodiment of the present application, the control module 40 may further obtain battery information of the device to be charged through the first contact 201, where the battery information includes voltage information of the battery, ID information of the battery, and temperature information of the battery. For example, when the device to be charged is an earphone, battery information of the earphone battery 600 in the earphone may be acquired.
After the control module 40 acquires the battery information of the device to be charged, the control module 40 may determine the charging state of the device to be charged according to the voltage information of the battery, for example, whether the device to be charged is constant voltage charging or constant current charging, or whether the device to be charged has completed charging. The control module 40 may determine whether the battery in the device to be charged is a genuine battery according to the ID information of the battery. The control module 40 may determine whether it is appropriate to charge the device to be charged at the current ambient temperature according to the temperature information of the battery.
Referring to fig. 3, a schematic diagram of an earphone provided in an embodiment of the present application is shown, the earphone is connected to the earphone box in the above embodiment, and as shown in fig. 3, the earphone includes an earphone shell, a second contact spring 300, a straight charging circuit 400, a control unit 500, and an earphone battery 600.
The control unit 500 and the direct charging circuit 400 are both electrically connected to the second contact spring 300, and the second contact spring 300 is grounded. The control unit 500 is electrically connected to the direct charging circuit 400, the direct charging circuit 400 is electrically connected to the earphone battery 600, and the earphone battery 600 is grounded. The second contact spring 300, the straight charging circuit 400, the control unit 500 and the earphone battery 600 are all disposed in the earphone housing.
Since the control unit 500 is electrically connected to the direct charging circuit 400 and the direct charging circuit 400 is electrically connected to the earphone battery 600, the control unit 500 can acquire the battery information of the earphone battery 600 through the direct charging circuit 400. Because the control unit 500 and the direct charging circuit 400 are electrically connected to the second contact spring plate 300, when the earphone is connected to the earphone box, i.e. when the earphone is placed in the earphone box, the second contact spring plate 300 contacts with the first contact spring plate 200 in the earphone box, the control unit 500 can transmit the acquired battery information to the first contact spring plate 200 through the second contact spring plate 300, and further transmit the acquired battery information to the control module 40 in the charging circuit, and the first contact spring plate 200 can transmit voltage to the second contact spring plate 300 to charge the earphone battery 600 in the earphone.
In addition, as shown in fig. 3, a second contact point 301 may be disposed in the second contact dome 300, and the second contact point 301 is electrically connected to the control unit 500.
When the second contact 301 is disposed in the second elastic sheet and the second contact 301 is electrically connected to the control unit 500, when the earphone is connected to the earphone box, that is, when the earphone is placed in the earphone box, the second contact 301 may contact with the first contact 201, the control unit 500 may transmit the acquired battery information to the first contact 201 through the second contact 301, and further transmit the battery information to the control module 40 in the charging circuit, and the first contact elastic sheet 200 may transmit voltage to the second contact elastic sheet 300. That is, by providing the second contact 301, it is possible to facilitate the transfer of battery information to the control module 40 in the charging circuit.
An embodiment of the present application provides an electronic device, which includes the electronic device provided in any of the above embodiments.
It should be noted that, in the embodiment of the present application, the electronic device includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
While alternative embodiments of the present application have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the true scope of the embodiments of the application.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or terminal apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or terminal apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or terminal device comprising the element.
The technical solutions provided in the present application are described in detail above, and the principles and embodiments of the present application are described herein by using specific examples, and meanwhile, for a person of ordinary skill in the art, according to the principles and implementation manners of the present application, changes may be made in the specific embodiments and application ranges.
Claims (10)
1. A charging circuit, comprising a voltage input and a voltage output;
a voltage adjusting circuit and a control module are arranged between the voltage input end and the voltage output end;
the voltage adjusting circuit is respectively electrically connected with the voltage input end, the voltage output end and the control module, the control module is respectively electrically connected with the voltage input end and the voltage output end, and the control module is used for acquiring the voltage of the voltage input end and the voltage of the voltage output end;
when the voltage of the voltage input end is greater than the target voltage, the control module controls the voltage adjusting circuit to be in a voltage reduction state, so that the voltage output by the voltage output end is equal to the target voltage;
under the condition that the voltage of the voltage input end is equal to the target voltage, the control module controls the voltage adjusting circuit to be in a voltage stabilization state, so that the voltage output by the voltage output end is equal to the target voltage;
under the condition that the voltage of the voltage input end is smaller than the target voltage, the control module controls the voltage adjusting circuit to be in a boosting state so that the voltage output by the voltage output end is equal to the target voltage;
the voltage output by the voltage output end is the voltage for charging the device to be charged.
2. The charging circuit of claim 1, wherein the voltage regulation circuit comprises: the first switch component, the second switch component, the third switch component, the fourth switch component, the inductor and the first capacitor;
the first switch assembly is electrically connected with the voltage input end and the inductor respectively, the inductor is electrically connected with the second switch assembly, and the second switch assembly is electrically connected with the voltage output end;
the third switch component is connected with the first end of the inductor, the third switch component is grounded, the fourth switch component is connected with the second end of the inductor, the fourth switch component is grounded, the first capacitor is connected with the second switch component, and the first capacitor is grounded;
the first switch assembly, the second switch assembly, the third switch assembly and the fourth switch assembly are electrically connected with the control module.
3. The charging circuit of claim 2, wherein in a case that the voltage at the voltage input terminal is greater than the target voltage, the control module controls the second switching component to be in a conducting state, controls the fourth switching component to be in a disconnecting state, and controls the first switching component and the third switching component to be in a conducting state alternately until the voltage output by the voltage output terminal is equal to the target voltage;
under the condition that the voltage of the voltage input end is equal to the target voltage, the control module controls the first switch assembly and the second switch assembly to be in a conducting state, and controls the third switch assembly and the fourth switch assembly to be in a disconnecting state;
and under the condition that the voltage of the voltage input end is less than the target voltage, the control module controls the first switch assembly to be in a conducting state, controls the third switch assembly to be in a disconnecting state, and controls the second switch assembly and the fourth switch assembly to be in a conducting state alternately until the voltage output by the voltage output end is equal to the target voltage.
4. The charging circuit of claim 2, wherein the first switch assembly comprises a first connection terminal, a second connection terminal, and a first control terminal, the second switch assembly comprises a third connection terminal, a fourth connection terminal, and a second control terminal, the third switch assembly comprises a fifth connection terminal, a sixth connection terminal, and a third control terminal, and the fourth switch assembly comprises a seventh connection terminal, an eighth connection terminal, and a fourth control terminal;
the first connecting end is electrically connected with the voltage input end, the second connecting end is electrically connected with the inductor, the inductor is electrically connected with the third connecting end, and the fourth connecting end is electrically connected with the voltage output end;
the fifth connection end is connected with the first end of the inductor, the sixth connection end is grounded, the seventh connection end is connected with the second end of the inductor, the eighth connection end is grounded, the first end of the first capacitor is connected with the fourth connection end, and the second end of the first capacitor is grounded;
the first control end, the second control end, the third control end and the fourth control end are all electrically connected with the control module.
5. The charging circuit of claim 2, wherein the first switching component, the second switching component, the third switching component, and the fourth switching component each comprise at least one of a triode, a load switch, and a metal-oxide semiconductor field effect transistor.
6. The charging circuit according to claim 1, wherein a second capacitor is further disposed between the voltage input terminal and the voltage output terminal, a first terminal of the second capacitor is connected to the voltage adjustment circuit, a second terminal of the second capacitor is connected to ground, and the second capacitor is configured to store the electric energy at the voltage input terminal, so that the electric energy is transmitted to the voltage output terminal.
7. The charging circuit according to claim 1, wherein the control module comprises a voltage obtaining device electrically connected to the voltage input terminal and the voltage output terminal respectively, and the voltage obtaining device is configured to obtain a voltage at the voltage input terminal and a voltage at the voltage output terminal.
8. The charging circuit of claim 7, wherein the voltage acquisition device is an analog-to-digital converter.
9. An earphone box, characterized in that the earphone box comprises a shell, an earphone box battery, a first contact spring sheet and the charging circuit of any one of claims 1-8;
the earphone box battery is electrically connected with a voltage input end in the charging circuit, the earphone box battery is grounded, the first contact elastic sheet is electrically connected with the voltage output end in the charging circuit, and the first contact elastic sheet is grounded;
the earphone box battery, the contact elastic sheet and the charging circuit are all arranged in the shell.
10. An earphone connected with the earphone box as claimed in claim 9, wherein the earphone comprises an earphone shell, a second contact spring, a direct charging circuit, a control unit and an earphone battery;
the control unit and the direct charging circuit are both electrically connected with the second contact elastic sheet, and the second contact elastic sheet is grounded;
the control unit is electrically connected with the direct charging circuit, the direct charging circuit is electrically connected with the earphone battery, and the earphone battery is grounded;
the second contact elastic sheet, the direct charging circuit, the control unit and the earphone battery are all arranged in the earphone shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022423199.2U CN213367459U (en) | 2020-10-26 | 2020-10-26 | Charging circuit, earphone box and earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022423199.2U CN213367459U (en) | 2020-10-26 | 2020-10-26 | Charging circuit, earphone box and earphone |
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| CN213367459U true CN213367459U (en) | 2021-06-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489105A (en) * | 2021-07-14 | 2021-10-08 | 钰泰半导体南通有限公司 | Single-inductor double-output switch charging circuit and control method thereof |
| WO2023130864A1 (en) * | 2022-01-10 | 2023-07-13 | Oppo广东移动通信有限公司 | Power receiving circuit, earphone, and earphone assembly |
| US20230379613A1 (en) * | 2022-05-18 | 2023-11-23 | Merry Electronics Co., Ltd. | Headset charging system and headset charging method thereof |
-
2020
- 2020-10-26 CN CN202022423199.2U patent/CN213367459U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113489105A (en) * | 2021-07-14 | 2021-10-08 | 钰泰半导体南通有限公司 | Single-inductor double-output switch charging circuit and control method thereof |
| WO2023130864A1 (en) * | 2022-01-10 | 2023-07-13 | Oppo广东移动通信有限公司 | Power receiving circuit, earphone, and earphone assembly |
| US20230379613A1 (en) * | 2022-05-18 | 2023-11-23 | Merry Electronics Co., Ltd. | Headset charging system and headset charging method thereof |
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