CN218216771U - Bluetooth headset storehouse of charging - Google Patents
Bluetooth headset storehouse of charging Download PDFInfo
- Publication number
- CN218216771U CN218216771U CN202222270624.8U CN202222270624U CN218216771U CN 218216771 U CN218216771 U CN 218216771U CN 202222270624 U CN202222270624 U CN 202222270624U CN 218216771 U CN218216771 U CN 218216771U
- Authority
- CN
- China
- Prior art keywords
- charging
- resistor
- capacitor
- earphone
- protection chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a bluetooth headset technical field provides bluetooth headset storehouse of charging, including storehouse processor that charges, lithium cell BAT, lithium cell charging unit and earphone charging unit, earphone charging unit includes lithium cell discharge circuit and earphone charging circuit, and lithium cell BAT is connected to lithium cell discharge circuit's input, and the LX end of storehouse processor that charges is connected to lithium cell discharge circuit's output, and earphone charging circuit's input is connected to the VOUT end of storehouse processor that charges, and earphone is connected to earphone charging circuit's output. The utility model discloses an adopt the storehouse processor that charges, cooperate corresponding lithium cell discharge circuit and earphone charging circuit, realized the advantage of low cost, miniaturization of bluetooth headset charging hardware design, had higher reliability.
Description
Technical Field
The utility model relates to a bluetooth headset technical field, it is specific, relate to bluetooth headset storehouse of charging.
Background
With the gradual cancellation of 3.5mm audio interfaces of mobile phones, the TWS (True Wireless Stereo) bluetooth headset is popular in the world, and the market demand is increasing in a well-spurt manner. The TWS headset completely removes physical wires, and has great advantages in aspects of volume, functional diversity, use experience and the like compared with the traditional headset. The TWS earphone is internally provided with a battery, and when charging is needed, the matched charging bin charges the earphone.
The existing charging bin is usually realized by a main control chip matched with a charging chip and a 5V boosting chip, and 5V is in a normally open mode. The method can only realize a simple charging function, and the change state of the charging bin cover and the earphone can be indicated only by additionally adding the switch cover detection circuit and putting the earphone into the detection circuit and taking the earphone out of the detection circuit. Therefore, the number of layers of the circuit board is increased, the number of components is increased, the power consumption is high, the design difficulty, the manufacturing cost and the maintenance difficulty are increased, and the problem of urgent need for optimization at the present stage is solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a bluetooth headset storehouse of charging has solved the problem that bluetooth headset storehouse of charging function is few, components and parts are many among the prior art.
The technical scheme of the utility model as follows:
bluetooth headset storehouse of charging, including storehouse processor, lithium cell BAT, lithium cell charging unit and earphone charging unit that charges, earphone charging unit includes lithium cell discharge circuit and earphone charging circuit, lithium cell discharge circuit's input is connected lithium cell BAT, lithium cell discharge circuit's output is connected the LX end of storehouse processor charges, the VOUT end of storehouse processor charges is connected earphone charging circuit's input, earphone charging circuit's output is connected the earphone.
Further, earphone charging circuit includes electric capacity C3, resistance R2, resistance R3, MOS pipe Q1, resistance R6 and resistance R7, electric capacity C3's first end is connected the VOUT end that the VOUT end of storehouse treater charges holds, electric capacity C3's second end ground connection, resistance R2's first end is connected electric capacity C3's first end, resistance R2's second end is connected MOS pipe Q1's drain electrode, resistance R3 connects in parallel on the resistance R2, MOS pipe Q1's grid passes through resistance R4 and connects the IO2 end of storehouse treater charges, MOS pipe Q1's source ground connection, left earphone positive contact is connected to electric capacity C3's first end, left earphone negative electrode contact is connected resistance R6's first end, resistance R6's second end ground connection, right earphone positive contact is connected to electric capacity C3's first end, right earphone negative electrode contact is connected resistance R7's first end, resistance R7's second end ground connection.
Further, the first end of resistance R6 is connected the PH1 end of storehouse treater charges, the first end of resistance R7 is connected the PH2 end of storehouse treater charges.
Further, lithium battery discharge circuit includes resistance R1, electric capacity C1, battery protection chip U1, electric capacity C2 and inductance L1, resistance R1's first end is connected the positive pole of lithium cell BAT, resistance R1's second end is connected the input of battery protection chip U1, the input of battery protection chip U1 passes through electric capacity C1 connects the negative pole of lithium cell BAT. The output end of the battery protection chip U1 is connected with the first end of the inductor L1 through the capacitor C2, the first end of the inductor L1 is connected with the first end of the resistor R1, and the second end of the inductor L1 is connected with the LX end of the charging bin processor.
Further, the lithium battery discharge circuit further comprises a fuse F1, and the fuse F1 is connected in series between the positive electrode of the lithium battery BAT and the first end of the resistor R1.
Further, the lithium battery charging unit includes interface J1, resistance R8, resistance R9, bidirectional thyristor D2, electric capacity C4, electric capacity C5 and charging protection chip U2, interface J1's CC1 end passes through resistance R8 ground connection, interface J1's CC2 end passes through resistance R9 ground connection, the VBUS end of interface is connected charging protection chip U2's input, charging protection chip U2's input passes through bidirectional thyristor D2 ground connection, charging protection chip U2's input passes through electric capacity C4 ground connection, charging protection chip U2's output passes through electric capacity C5 ground connection, charging protection chip U2's output outputs the 5V power.
The utility model discloses a theory of operation and beneficial effect do:
the utility model discloses in, be the boost circuit of synchronous rectification between VOUT end and the LX end of storehouse treater that charges, through the 5V power of lithium cell discharge circuit to the LX end input of storehouse treater that charges, earphone charging circuit charges left earphone and right earphone by the VOUT end of storehouse treater that charges. The utility model discloses an adopt the storehouse treater that charges, cooperate corresponding lithium battery discharge circuit and earphone charging circuit, realized the low-cost of bluetooth headset hardware design that charges, miniaturized advantage, have higher reliability.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a circuit diagram of the charging circuit of the present invention;
fig. 2 is a circuit diagram of a discharge circuit of a lithium battery of the present invention;
fig. 3 is a circuit diagram of the lithium battery charging unit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive work, are related to the scope of protection of the present invention.
Example 1
This embodiment has provided bluetooth headset storehouse of charging, including storehouse treater, lithium cell BAT, lithium cell charging unit and earphone charging unit, earphone charging unit includes lithium cell discharge circuit and earphone charging circuit, and lithium cell BAT is connected to lithium cell discharge circuit's input, and the LX end of storehouse treater of charging is connected to lithium cell discharge circuit's output, and earphone charging circuit's input is connected to the VOUT end of storehouse treater of charging, and the earphone is connected to earphone charging circuit's output.
In this embodiment, a boost circuit for synchronous rectification is provided between the VOUT terminal and the LX terminal of the charge bin processor, a 5V power supply is input to the LX terminal of the charge bin processor through a lithium battery discharge circuit, and the VOUT terminal of the charge bin processor charges the left earphone and the right earphone through an earphone charging circuit. In this embodiment, the charging bin processor adopts a bluetooth headset charging bin management chip with the model IP 5516.
Further, in the present invention, it is preferable that,
as shown in fig. 1, the earphone charging circuit includes a capacitor C3, a resistor R2, a resistor R3, a MOS transistor Q1, a resistor R6 and a resistor R7, the VOUT end of the VOUT end charging bin processor of the charging bin processor is connected to the first end of the capacitor C3, the second end of the capacitor C3 is grounded, the first end of the capacitor C3 is connected to the first end of the resistor R2, the drain electrode of the MOS transistor Q1 is connected to the second end of the resistor R2, the resistor R3 is connected in parallel to the resistor R2, the gate of the MOS transistor Q1 is connected to the IO2 end of the charging bin processor through the resistor R4, the source electrode of the MOS transistor Q1 is grounded, the first end of the capacitor C3 is connected to the left earphone negative electrode contact, the first end of the resistor R6 is connected to the left earphone negative electrode contact, the second end of the resistor R6 is grounded, the first end of the capacitor C3 is connected to the right earphone positive electrode contact, the first end of the right earphone negative electrode contact is connected to the resistor R7, and the second end of the resistor R7 is grounded. The first end of resistance R6 connects the PH1 end of storehouse treater that charges, and the PH2 end of storehouse treater that charges is connected to the first end of resistance R7.
In this embodiment, the earphone charging circuit charges the left earphone and the right earphone through a combination of 0V and 5V signals with a certain pulse width output by the charging bin processor. When the VOUT end of the charging bin processor and the positive contact of the earphone are both connected with filtering capacitors of orders of magnitude, the falling edge of signals in the communication process can be influenced. When VOUT end output 0V, switch on control MOS pipe Q1, can release the electric charge on the filter capacitor, shorten the time of trailing edge, the size of adjustable bleeder current of adjusting resistance R2, R3. When the VOUT end outputs 5V, the MOS tube Q1 is controlled to be closed, the 5V booster circuit can be started immediately, and compared with a control method of an external booster circuit, the method shortens the filtering time of an enable signal.
The circuit R6 and the resistor R7 are connected with the charging bin processor, so that the earphone can be put in or taken out for detection. When the earphone is not in the storehouse, the voltage of PH1 and PH2 pin is 0, and the storehouse treater that charges can cut off earphone charging circuit. When the earphone is put in, the voltage at the VOUT end passes through the earphone and then is grounded through the OH end and the resistors R6 and R7, the pull-down resistor generates a 0.3V voltage drop, the earphone putting signal of the charging bin processor is triggered, and the earphone charging circuit starts to charge the earphone.
Further, in the present invention,
as shown in fig. 2, the lithium battery discharging circuit includes a resistor R1, a capacitor C1, a battery protection chip U1, a capacitor C2, and an inductor L1, a first end of the resistor R1 is connected to a positive electrode of the lithium battery BAT, a second end of the resistor R1 is connected to an input end of the battery protection chip U1, and the input end of the battery protection chip U1 is connected to a negative electrode of the lithium battery BAT through the capacitor C1. The output end of the battery protection chip U1 is connected with the first end of the inductor L1 through the capacitor C2, the first end of the inductor L1 is connected with the first end of the resistor R1, and the second end of the inductor L1 is connected with the LX end of the charging bin processor. The lithium battery discharge circuit further comprises a fuse F1, and the fuse F1 is connected between the positive electrode of the lithium battery BAT and the first end of the resistor R1 in series.
In this embodiment, a lithium battery discharge circuit provides 5V voltage to charge the earphone. The positive electrode of the lithium battery BAT is connected with the LX end of the charging bin processor IP5516 through the recoverable fuse F1 and the inductor L1, and the fuse F1 further provides protection when the battery is short-circuited and the lithium battery protection chip cannot normally respond.
Further, in the present invention,
as shown in fig. 3, the lithium battery charging unit includes an interface J1, a resistor R8, a resistor R9, a bidirectional thyristor D2, a capacitor C4, a capacitor C5 and a charging protection chip U2, the CC1 end of the interface J1 is grounded through the resistor R8, the CC2 end of the interface J1 is grounded through the resistor R9, the VBUS end of the interface is connected to the input end of the charging protection chip U2, the input end of the charging protection chip U2 is grounded through the bidirectional thyristor D2, the input end of the charging protection chip U2 is grounded through the capacitor C4, the output end of the charging protection chip U2 is grounded through the capacitor C5, and the output end of the charging protection chip U2 outputs a 5V power supply.
In this embodiment, type-C is used as a charging interface of the charging bin, CC1 and CC2 of the interface J1 are pulled down to the ground through the resistor R8 and the resistor R9, and only receive a power supply provided from the outside, that is, the UFP. Charging power is input to the charging protection chip U2 through the interface J1, the bidirectional thyristor D2 used for absorbing transient surge current is added at the input end, and the problem that the adapter provides incorrect charging voltage in the moment of access to cause reliability is avoided. The 5V voltage output by the charging protection chip U2 is connected to a VIN pin of the charging bin processor chip IP5516, and after the charging bin processor detects that the VIN pin has voltage input, an internal linear charging circuit can be started to charge the lithium battery BAT.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the present invention.
Claims (6)
1. Bluetooth headset storehouse of charging, its characterized in that, including storehouse processor, lithium cell BAT, lithium cell charging unit and earphone charging unit, earphone charging unit includes lithium cell discharge circuit and earphone charging circuit, lithium cell discharge circuit's input is connected lithium cell BAT, lithium cell discharge circuit's output is connected the LX end of storehouse processor charges, the VOUT end of storehouse processor charges the input of earphone charging circuit, earphone charging circuit's output is connected the earphone.
2. The bluetooth headset charging bin of claim 1, wherein the headset charging circuit comprises a capacitor C3, a resistor R2, a resistor R3, an MOS transistor Q1, a resistor R6 and a resistor R7, the first end of the capacitor C3 is connected to the VOUT end of the VOUT end charging bin processor of the charging bin processor, the second end of the capacitor C3 is grounded, the first end of the resistor R2 is connected to the first end of the capacitor C3, the second end of the resistor R2 is connected to the drain electrode of the MOS transistor Q1, the resistor R3 is connected in parallel to the resistor R2, the gate of the MOS transistor Q1 is connected to the IO2 end of the charging bin processor through a resistor R4, the source electrode of the MOS transistor Q1 is grounded, the first end of the capacitor C3 is connected to the positive electrode of a left headset, the negative electrode contact of a left headset is connected to the first end of the resistor R6, the second end of the resistor R6 is grounded, the first end of the capacitor C3 is connected to the positive electrode of a right headset, the negative electrode contact of a right headset, and the second end of the resistor R7 is connected to the ground.
3. The bluetooth headset charging bin of claim 2, wherein the first end of the resistor R6 is connected to the PH1 end of the charging bin processor, and the first end of the resistor R7 is connected to the PH2 end of the charging bin processor.
4. The bluetooth headset charging bin of claim 1, wherein the lithium battery discharging circuit comprises a resistor R1, a capacitor C1, a battery protection chip U1, a capacitor C2 and an inductor L1, a first end of the resistor R1 is connected to an anode of the lithium battery BAT, a second end of the resistor R1 is connected to an input end of the battery protection chip U1, an input end of the battery protection chip U1 is connected to a cathode of the lithium battery BAT through the capacitor C1, an output end of the battery protection chip U1 is connected to a first end of the inductor L1 through the capacitor C2, a first end of the inductor L1 is connected to a first end of the resistor R1, and a second end of the inductor L1 is connected to an LX terminal of the charging bin processor.
5. The charging bin for the Bluetooth headset of claim 4, wherein the lithium battery discharging circuit further comprises a fuse F1, and the fuse F1 is connected in series between a positive electrode of the lithium battery BAT and the first end of the resistor R1.
6. The bluetooth headset charging bin of claim 1, wherein the lithium battery charging unit comprises an interface J1, a resistor R8, a resistor R9, a triac D2, a capacitor C4, a capacitor C5 and a charging protection chip U2, wherein a CC1 end of the interface J1 is grounded through the resistor R8, a CC2 end of the interface J1 is grounded through the resistor R9, a VBUS end of the interface is connected to an input end of the charging protection chip U2, an input end of the charging protection chip U2 is grounded through the triac D2, an input end of the charging protection chip U2 is grounded through the capacitor C4, an output end of the charging protection chip U2 is grounded through the capacitor C5, and an output end of the charging protection chip U2 outputs a 5V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222270624.8U CN218216771U (en) | 2022-08-26 | 2022-08-26 | Bluetooth headset storehouse of charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222270624.8U CN218216771U (en) | 2022-08-26 | 2022-08-26 | Bluetooth headset storehouse of charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218216771U true CN218216771U (en) | 2023-01-03 |
Family
ID=84659098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222270624.8U Active CN218216771U (en) | 2022-08-26 | 2022-08-26 | Bluetooth headset storehouse of charging |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218216771U (en) |
-
2022
- 2022-08-26 CN CN202222270624.8U patent/CN218216771U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017036413A1 (en) | Power management circuit, intelligent terminal and charging method | |
| CN103607676B (en) | A kind of wire-controlled apparatus for earphone and earphone | |
| CN205283193U (en) | Battery management system's timing activation circuit | |
| CN104767252A (en) | Tablet computer | |
| CN101986502A (en) | Mobile phone battery charging circuit | |
| CN103904698A (en) | Battery unit, terminal equipment and battery unit configuration method | |
| CN203324738U (en) | Low-quiescent current level switching circuit and electronic equipment provided therewith | |
| CN207652086U (en) | A kind of battery management system multichannel wake-up circuit | |
| CN218216771U (en) | Bluetooth headset storehouse of charging | |
| CN101860054B (en) | Charge management circuit of lithium-ion battery | |
| CN101465556B (en) | External charging circuit of mobile equipment | |
| CN103166297B (en) | Power-fail protection circuit without backup battery | |
| CN109245240B (en) | High-efficiency power-off energy storage protection circuit | |
| CN104167784A (en) | Portable power source circuit | |
| CN215528664U (en) | Hall and key double control circuit for TWS earphone charging box in parallel connection mode | |
| CN205377347U (en) | Portable power source and charging and discharging circuit thereof | |
| CN206673631U (en) | A kind of battery charger | |
| CN203233198U (en) | Battery charging and discharging control circuit and mobile terminal | |
| CN210111649U (en) | Battery reverse connection prevention circuit and charger | |
| CN105281588B (en) | A kind of high-precision primary side feedback type power module and its control method | |
| CN209526556U (en) | Power supply switch circuit | |
| CN210468847U (en) | Battery charging circuit based on DC-DC power supply chip | |
| CN204632339U (en) | A kind of high-power audio playing circuit and audio playing apparatus | |
| CN203859545U (en) | Single chip intelligent power supply with load state detection and multiple independent current limit output | |
| CN201345532Y (en) | Power output short-circuit protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |