CN215528664U - Hall and key double control circuit for TWS earphone charging box in parallel connection mode - Google Patents
Hall and key double control circuit for TWS earphone charging box in parallel connection mode Download PDFInfo
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- CN215528664U CN215528664U CN202122022696.6U CN202122022696U CN215528664U CN 215528664 U CN215528664 U CN 215528664U CN 202122022696 U CN202122022696 U CN 202122022696U CN 215528664 U CN215528664 U CN 215528664U
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Abstract
The utility model discloses a control circuit for realizing Hall and button dual control of a TWS earphone charging box in a parallel connection mode, which comprises a charging box management module, a power input interface and a power output interface, the device comprises a Hall module, an electronic switch module, an instantaneous power-on module, a key module and a lithium battery, wherein a power input interface is connected to a power input end of a charging box management module, a power output interface is connected to a power output end of the charging box management module, the lithium battery is connected to a lithium battery interface of the charging box management module, a power end of the Hall module is connected to a positive power end of the lithium battery, an output end of the Hall module is connected to a control end of the charging box management module, one end of the key module is connected to the positive power end of the lithium battery, the other end of the key module is connected to the instantaneous power-on module, the instantaneous power-on module is connected to the control end of the electronic switch module, and an output end of the electronic switch module is connected to the control end of the charging box management module.
Description
Technical Field
The utility model discloses a Bluetooth headset charging box, in particular to a control circuit which enables a TWS headset charging box to realize Hall and button dual control in a parallel connection mode, and belongs to the technical field of consumer electronics.
Background
The TWS is called True Wireless Stereo after full name, and means real Wireless Stereo, and the TWS technology is developed based on Bluetooth chip technology, and the working principle of the TWS is that a mobile phone is connected with a main earphone, and then the main earphone is quickly connected with an auxiliary earphone in a Wireless mode, so that real Bluetooth left and right sound channels are wirelessly separated for use. The TWS earphone is rapidly developed in recent years, and is more humanized and intelligent, and is more miniaturized and simplified. Because the volume of the TWS earphone is small, the battery in the TWS earphone can not be made to be large, and the whole duration is influenced, therefore, the TWS earphone in the prior art is used together with the charging box, the charging box (or called an earphone cabin, an earphone box, a charging cabin and the like) in the prior art is provided with a special charging cabin chip which is matched with a power input interface, a power output interface and the like, the existing chip in the market is controlled by a Hall element or a key in two modes due to the limitation of the functions of the chip, and the two modes can be selected to use only, so that the two modes can not be combined, and certain trouble is brought to the design and the use of the earphone box.
Disclosure of Invention
Aiming at the defect that the charging box in the prior art cannot realize the simultaneous control of the Hall element or the key, the utility model provides the control circuit which enables the TWS earphone charging box to realize the Hall and key dual control in a parallel connection mode.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a control circuit for realizing Hall and button dual control of a TWS earphone charging box in a parallel connection mode comprises a charging box management module, a power input interface and a power output interface, the device comprises a Hall module, an electronic switch module, an instantaneous power-on module, a key module and a lithium battery, wherein a power input interface is connected to a power input end of a charging box management module, a power output interface is connected to a power output end of the charging box management module, the lithium battery is connected to a lithium battery interface of the charging box management module, a power end of the Hall module is connected to a positive power end of the lithium battery, an output end of the Hall module is connected to a control end of the charging box management module, one end of the key module is connected to the positive power end of the lithium battery, the other end of the key module is connected to the instantaneous power-on module, the instantaneous power-on module is connected to the control end of the electronic switch module, and an output end of the electronic switch module is connected to the control end of the charging box management module.
The technical scheme adopted by the utility model for solving the technical problem further comprises the following steps:
the power input interface can adopt a charging interface commonly used by a MINI USB interface, a Micro USB interface, a TYPE-C interface or a Lighting interface.
And a first filtering module is connected between the power input interface and the charging box management module, and the first filtering module is a filtering capacitor C2 connected between a positive power supply end and a negative power supply end of the power input interface.
The power output interface comprises a first power output interface and a second power output interface, a transient suppression diode E1 is connected between the positive power supply end of the first power output interface and the ground, and a transient suppression diode E2 is connected between the positive power supply end of the second power output interface and the ground.
A resonant inductor L1 is connected between a resonant inductor interface of the charging box management module and a positive power supply end of the lithium battery, and a filter capacitor C1 is connected between the lithium battery interface and the ground.
And a current-limiting resistor R10 is connected in series between the Hall module and the control end of the charging box management module.
The electronic switch module adopts a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the control end of the charging box management module through a current-limiting resistor R11 connected in series, the source electrode of the MOS tube Q1 is grounded, a resistor R4 is connected between the grid electrode of the MOS tube Q1 and the ground, and the grid electrode of the MOS tube Q1 is connected with one end of the instantaneous power-on module.
The instant power-on module adopts a capacitor C7, the capacitor C7 adopts a capacitor of 0.1 muF, one end of the instant power-on module is connected with the electronic switch module, and the other end of the instant power-on module is connected with the key switch module.
The key switch module adopts a key switch SW1, one end of the key switch SW1 is connected with the instant power-on module, and the other end of the key switch module is connected with a positive power supply end of the lithium battery.
And an LED interface of the charging box management module is connected with an indicator lamp.
The utility model has the beneficial effects that: aiming at the defects of the TWS earphone charging box, the utility model adopts ingenious design on the basis of the original chip, solves the defect that the original chip cannot meet the requirement that the Hall module and the key switch module cannot be controlled simultaneously through low-cost and simple circuit design, and ensures that the charging box is more diversified and humanized in application.
The utility model will be further described with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a block diagram of the circuit of the present invention.
Fig. 2 is a schematic circuit diagram of a part of the charging bin management module according to the present invention.
FIG. 3 is a schematic diagram of an input interface portion of the present invention.
FIG. 4 is a schematic diagram of the output interface part of the present invention.
FIG. 5 is a schematic diagram of the control circuit of the present invention.
Detailed Description
The present embodiment is a preferred embodiment of the present invention, and other principles and basic structures that are the same as or similar to the present embodiment are within the scope of the present invention.
Referring to fig. 1 to 5, the present invention mainly includes a charging box management module, a power input interface, a power output interface, a HALL module, an electronic switch module, an instant power module, a KEY module and a lithium battery, wherein the power input interface is connected to the power input of the charging box management module, the power output interface is connected to the power output of the charging box management module, the lithium battery is connected to the lithium battery interface of the charging box management module, the power end of the HALL module is connected to the positive power end of the lithium battery, the output end of the HALL module is connected to the control end of the charging box management module (in this embodiment, the control end is a KEY/HALL interface), one end of the KEY module is connected to the positive power end of the lithium battery, the other end of the KEY module is connected to the instant power module, the instant power module is connected to the control end of the electronic switch module, the output end of the electronic switch module is connected to the control end of the charging box management module (in this embodiment, the control end is a KEY/HALL interface).
In this embodiment, the charging box management module adopts a chip U1 special for a TWS bluetooth charging box with a model number SY8821, and when the charging box management module is specifically implemented, chips of the same type with other models can be adopted for replacement. The power input interface can adopt the commonly used interface that charges such as MINI USB interface, Micro USB interface, TYPE-C interface, Lighting interface for connect external power supply, charge for the box that charges, be connected with first filter module between power input interface and the box management module that charges, first filter module is for connecting the filter capacitor C2 between power input interface positive power supply end and negative power source end.
In this embodiment, the power output interface includes a first power output interface and a second power output interface, which are respectively used for charging the left earphone and the right earphone, a transient suppression diode E1 is connected between a positive power source end of the first power output interface and the ground, and a transient suppression diode E2 is connected between a positive power source end of the second power output interface and the ground, and is used for preventing surge and spike pulse.
In this embodiment, the lithium battery is connected to a lithium battery interface (i.e., BAT interface) of the charging box management module, a resonant inductor L1 is connected between a resonant inductor interface (i.e., LX interface) of the charging box management module and a positive power source end of the lithium battery, and is used for boosting the voltage of the lithium battery, and a filter capacitor C1 is connected between the lithium battery interface and the ground.
In this embodiment, the hall module adopts a hall chip U2 with a model number of SDC1217, an output terminal VOUT of the hall chip U2 is directly connected with a control terminal of the charging box management module through a current limiting resistor R10 connected in series, and outputs a hall control signal to the charging box management module to control the operation thereof. The electronic switch module adopts a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the control end of the charging box management module through a current-limiting resistor R11 connected in series, the source electrode of the MOS tube Q1 is grounded, a resistor R4 is connected between the grid electrode of the MOS tube Q1 and the ground, the grid electrode of the MOS tube Q1 is connected with one end of an instantaneous power-on module, in the embodiment, the instantaneous power-on module adopts a capacitor C7, the capacitor C7 adopts a 0.1 muF capacitor, the other end of the instantaneous power-on module is connected with one end of a key switch module (namely, a key switch SW 1), and the other end of the key switch module is connected with the positive power end of a lithium battery.
In this embodiment, the LED interface of the charging box management module is connected with an indicator light for indicating a charging state, a working state, a remaining power, and the like.
When the TWS earphone charging box is opened and closed in use (namely, the magnet is far away from or close to the Hall switch U2), the 2 pin of the Hall switch U2 generates high and low level changes, and the power management chip U1 (namely, the TWS Bluetooth charging box special chip U1) changes the working mode by the level changes, such as: the LED lamp can be lightened, and the like, so that the magnetic control function is realized; when the KEY switch SW1 is pressed, energy of the lithium battery positive power terminal B + forms a loop through the switch SW1, the capacitor C7 and the resistor R4 to charge the capacitor C7, at this time, a high level exists in the G pin of the field effect transistor Q1, the D pin and the S pin of the field effect transistor Q1 are turned on, the level of the 13 pin (i.e., KEY/HALL pin) of the power management chip U1 is instantly lowered through the resistor R11, after the capacitor C7 is fully charged, the energy of the lithium battery positive power terminal B + is no longer pulled to the G pin of the field effect transistor Q1 through the capacitor C7, at this time, the G pin of the field effect transistor Q1 is pulled to a low level by the resistor R4, so that the D pin and the S pin of the field effect transistor Q1 are cut off, and the level of the 13 pin (i.e., KEY/HALL pin) of the power management chip U1 returns to a high level, thereby achieving the KEY control function.
Aiming at the defects of the TWS earphone charging box, the utility model adopts ingenious design on the basis of the original chip, solves the defect that the original chip cannot meet the requirement that the Hall module and the key switch module cannot be controlled simultaneously through low-cost and simple circuit design, and ensures that the charging box is more diversified and humanized in application.
Claims (10)
1. The utility model provides a let TWS earphone charging box realize hall, two control circuit of button through parallel connection mode, characterized by: the control circuit comprises a charging box management module, a power input interface, a power output interface, a Hall module, an electronic switch module, an instantaneous power-on module, a key module and a lithium battery, wherein the power input interface is connected to the power input end of the charging box management module, the power output interface is connected to the power output end of the charging box management module, the lithium battery is connected to the lithium battery interface of the charging box management module, the power end of the Hall module is connected with the positive power end of the lithium battery, the output end of the Hall module is connected with the control end of the charging box management module, one end of the key module is connected with the positive power end of the lithium battery, the other end of the key module is connected with the instantaneous power-on module, the instantaneous power-on module is connected with the control end of the electronic switch module, and the output end of the electronic switch module is connected with the control end of the charging box management module.
2. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: the power input interface adopts a charging interface commonly used by a MINI USB interface, a Micro USB interface, a TYPE-C interface or a Lighting interface.
3. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: and a first filtering module is connected between the power input interface and the charging box management module, and the first filtering module is a filtering capacitor C2 connected between a positive power supply end and a negative power supply end of the power input interface.
4. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: the power output interface comprises a first power output interface and a second power output interface, a transient suppression diode E1 is connected between the positive power supply end of the first power output interface and the ground, and a transient suppression diode E2 is connected between the positive power supply end of the second power output interface and the ground.
5. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: a resonant inductor L1 is connected between a resonant inductor interface of the charging box management module and a positive power supply end of the lithium battery, and a filter capacitor C1 is connected between the lithium battery interface and the ground.
6. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: and a current-limiting resistor R10 is connected in series between the Hall module and the control end of the charging box management module.
7. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: the electronic switch module adopts a MOS tube Q1, the drain electrode of the MOS tube Q1 is connected with the control end of the charging box management module through a current-limiting resistor R11 connected in series, the source electrode of the MOS tube Q1 is grounded, a resistor R4 is connected between the grid electrode of the MOS tube Q1 and the ground, and the grid electrode of the MOS tube Q1 is connected with one end of the instantaneous power-on module.
8. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: the instant power-on module adopts a capacitor C7, the capacitor C7 adopts a capacitor of 0.1 muF, one end of the instant power-on module is connected with the electronic switch module, and the other end of the instant power-on module is connected with the key switch module.
9. The parallel connection type TWS earphone charging box of claim 8, which is used for realizing a Hall and key dual control circuit, wherein the circuit comprises: the key switch module adopts a key switch SW1, one end of the key switch SW1 is connected with the instant power-on module, and the other end of the key switch module is connected with a positive power supply end of the lithium battery.
10. The parallel connection type TWS earphone charging box of claim 1, which is used for realizing a Hall and key dual control circuit, and is characterized in that: and an LED interface of the charging box management module is connected with an indicator lamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122022696.6U CN215528664U (en) | 2021-08-26 | 2021-08-26 | Hall and key double control circuit for TWS earphone charging box in parallel connection mode |
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| CN202122022696.6U CN215528664U (en) | 2021-08-26 | 2021-08-26 | Hall and key double control circuit for TWS earphone charging box in parallel connection mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115550796A (en) * | 2022-12-05 | 2022-12-30 | 深圳英集芯科技股份有限公司 | Single-chip charging bin circuit method and equipment supporting TWS earphone two-way communication |
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2021
- 2021-08-26 CN CN202122022696.6U patent/CN215528664U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115550796A (en) * | 2022-12-05 | 2022-12-30 | 深圳英集芯科技股份有限公司 | Single-chip charging bin circuit method and equipment supporting TWS earphone two-way communication |
| CN115550796B (en) * | 2022-12-05 | 2023-05-26 | 深圳英集芯科技股份有限公司 | Single-chip charging bin circuit method and equipment supporting TWS earphone two-way communication |
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