CN217240904U - Wireless earphone low-pressure-difference backflow preventing circuit - Google Patents
Wireless earphone low-pressure-difference backflow preventing circuit Download PDFInfo
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- CN217240904U CN217240904U CN202220660670.6U CN202220660670U CN217240904U CN 217240904 U CN217240904 U CN 217240904U CN 202220660670 U CN202220660670 U CN 202220660670U CN 217240904 U CN217240904 U CN 217240904U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A wireless earphone low-pressure difference backflow prevention circuit comprises: the input end of the first input unit is used for being connected with the first charging unit; the input end of the second input unit is used for being connected with the second charging unit; the first charging unit and the second charging unit are different types of charging devices; the input end and the control end of the first power switch module are electrically connected with the output end of the first input unit; the input end and the control end of the second power switch module are electrically connected with the output end of the second input unit; the input end of the output unit is respectively connected with the output end of the first power switch module and the output end of the second power switch module, and the output end of the output unit is used for connecting a battery module of the wireless earphone; the first power switch module and the second power switch module are used for preventing current from flowing backwards. The utility model provides an easy backward flow phenomenon that produces among the bluetooth headset charging process.
Description
Technical Field
The utility model belongs to the wireless earphone field, concretely relates to wireless earphone low dropout prevents flowing backward circuit.
Background
At present, earphones become one of indispensable important accessories of electronic products, and intelligent earphones with different functional types emerge in the market to meet different requirements. Because the convenience of wireless bluetooth headset self receives more and more liking of many people, gives people the life and brings the convenience.
However, wireless earphones, especially ear canal type or earplug type wireless earphones, have a small size, and cannot accommodate a battery with a large electric quantity, so that endurance is insufficient. The wireless earphone has high requirement on charging, and the phenomenon of direct current backflow is easily generated in the charging process, so that equipment and circuits are damaged, and the safety of a user can be threatened under severe conditions.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a wireless earphone low-pressure difference prevents flowing backward circuit, wireless earphone low-pressure difference prevents flowing backward circuit has solved the problem that the electric current can appear flowing backward in the wireless earphone charging process.
According to the utility model discloses wireless earphone low dropout prevents flowing backward circuit, include:
the input end of the first input unit is used for being connected with the first charging unit;
the input end of the second input unit is used for being connected with the second charging unit; the first charging unit and the second charging unit are different types of charging devices;
the first power switch module is provided with an input end, an output end and a control end, and the input end and the control end of the first power switch module are electrically connected with the output end of the first input unit;
the second power switch module is provided with an input end, an output end and a control end, and the input end and the control end of the second power switch module are electrically connected with the output end of the second input unit;
the output unit is provided with an input end and an output end, the input end of the output unit is respectively connected with the output end of the first power switch module and the output end of the second power switch module, and the output end of the output unit is used for being connected with a battery module of a wireless earphone; the first power switch module and the second power switch module are used for preventing current from flowing backwards.
According to the utility model discloses wireless earphone low dropout prevents flowing backward circuit has following technological effect at least: the charging can be carried out through the first input unit and the second input unit in two different modes; first switch module and second switch module itself possess the ability that prevents the electric current by output flow direction input, and then make first input unit and second input unit respectively through first switch module and second switch module can reach the purpose that prevents the electric current and flow backward, have solved the wireless earphone charging process and can appear the electric current phenomenon of flowing backward. In addition, the voltage drop of the first power switch module and the second power switch module is extremely small, and the normal work of the equipment cannot be influenced.
According to some embodiments of the invention, the first power switch module and the second power switch module all employ SGM2578A model chips.
According to some embodiments of the utility model, first input unit is the DC direct current module of charging, the DC direct current charge the positive output of module with the input of first switch module is connected, the DC direct current charge the negative output of module and be connected with the ground wire.
According to some embodiments of the utility model, wireless earphone low dropout prevents flowing backward circuit still including connecting magnetic bead between DC direct current charging module's the burden output and the ground wire.
According to some embodiments of the utility model, wireless earphone low dropout prevents flowing backward circuit still includes the voltage stabilizing unit.
According to the utility model discloses a some embodiments, the voltage stabilizing unit includes first voltage stabilizing unit and second voltage stabilizing unit, first voltage stabilizing unit set up in between the negative output end of DC direct current charging module and the ground wire, second voltage stabilizing unit set up in the DC direct current charging module positive output end with between the intermediate node and the ground wire of first switch module.
According to some embodiments of the utility model, wireless earphone low dropout prevents flowing backward circuit still including connecting DC direct current charge module positive output with resistance between first switch module's intermediate node and the ground wire.
According to some embodiments of the invention, the output unit employs a BQ25170DSGR model chip.
According to the utility model discloses a some embodiments, wireless earphone low dropout prevents flowing backward circuit still including parallelly connected third electric capacity with fourth electric capacity, third electric capacity with fourth electric capacity forms electric capacity parallel structure, electric capacity parallel structure's one end with the output of first switch module is connected, and the other end is used for connecting the ground wire.
According to some embodiments of the invention, the second input unit is a TYPE-C charging module.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic circuit diagram of a wireless headset low-dropout backflow prevention circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an output unit portion of the wireless earphone low-dropout backflow prevention circuit according to the embodiment of the present invention.
Reference numerals are as follows:
a first input unit 100, a second input unit 200, a first power switch module 300, a second power switch module 400, and an output unit 500.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the directional descriptions, such as the directions of upper, lower, front, rear, left, right, etc., are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.
The wireless headset low-dropout backflow prevention circuit according to an embodiment of the present invention is described below with reference to fig. 1 to 2.
According to the utility model discloses wireless earphone low dropout prevents flowing backward circuit, include: a first input unit 100, a second input unit 200, a first power switch module 300, a second power switch module 400, and an output unit 500.
A first input unit 100, an input end of which is used for connecting a first charging unit;
a second input unit 200, an input end of which is used for connecting a second charging unit; the first charging unit and the second charging unit are different types of charging devices;
a first power switch module 300 having an input terminal, an output terminal, and a control terminal, wherein the input terminal and the control terminal of the first power switch module 300 are electrically connected to the output terminal of the first input unit 100;
a second power switch module 400 having an input terminal, an output terminal, and a control terminal, wherein the input terminal and the control terminal of the second power switch module 400 are electrically connected to the output terminal of the second input unit 200;
an output unit 500 having an input end and an output end, wherein the input end of the output unit 500 is respectively connected with the output end of the first power switch module 300 and the output end of the second power switch module 400, and the output end of the output unit 500 is used for connecting a battery module of a wireless headset; both the first power switch module 300 and the second power switch module 400 are used to prevent current from flowing backwards.
Referring to fig. 1, the first power switch module 300 and the second power switch module 400 both have an input terminal, an output terminal, and a control terminal, and when the control terminals of the first power switch module 300 and the second power switch module 400 are enabled, the first power switch module 300 and the second power switch module 400 can complete outputting; meanwhile, the first power switch module 300 and the second power switch module 400 have only unidirectional transmission capability, and can only transmit power from the input end to the output end, but cannot transmit power from the output end to the input end. The first charging unit provides electric energy for the first input unit 100, current flows from the output end of the first input unit 100 to the input end and the control end of the first power switch module 300, the control end of the first power switch module 300 is enabled, so that an electric signal input from the input end of the first power switch module 300 can be output from the output end, and further flows into the battery module of the wireless headset through the output unit 500, at this time, the current of the first power switch module 300 flows to the output end of the second power switch module 400, and the current cannot flow into the second input unit 200, so that the backward flow of the current is prevented; when the second charging unit provides power for the second input unit 200, the current flows from the output terminal of the second input unit 200 to the input terminal and the control terminal of the second power switch module 400, and the control terminal of the second power switch module 400 is enabled, so that the electrical signal input from the input terminal of the second power switch module 400 can be output from the output terminal, and further flows into the battery module of the wireless headset through the output unit 500, at this time, the current of the second power switch module 400 flows to the output terminal of the first power switch module 300, and the current cannot flow into the first input unit 100, thereby preventing the current from flowing backward. In addition, it should be noted that, because the first power switch module 300 and the second power switch module 400 cannot flow from the output end to the input end, all directional currents of the two charging circuit parts cannot flow in the same direction, thereby fundamentally preventing all backflow possibilities.
According to the wireless earphone low-voltage-difference backflow prevention circuit provided by the embodiment of the utility model, the wireless earphone low-voltage-difference backflow prevention circuit can be charged in two different ways through the first input unit 100 and the second input unit 200; the first power switch module 300 and the second power switch module 400 have the capability of preventing current from flowing from the output end to the input end, so that the first input unit 100 and the second input unit 200 can reach the purpose of preventing the current from flowing backwards through the first power switch module 300 and the second power switch module 400 respectively, and the problem that the current can flow backwards in the charging process of the wireless headset is solved. In addition, the voltage drop of the first power switch module 300 and the second power switch module 400 is very small, and the normal operation of the device is not affected.
In some embodiments, the first input unit 100 and the second input unit 200 are actually power modules of two charging methods.
Referring to fig. 1, in some embodiments of the present invention, the first power switch module 300 and the second power switch module 400 both employ SGM2578A model chips. The SGM2578A model chip has an input terminal VIN, an output terminal VOUT, a control terminal EN, and a ground terminal GND. When the first charging unit provides electric energy to the first input unit 100, current flows from the output terminal of the first input unit 100 to the input terminal VIN and the control terminal EN of the first power switch module 300, and the control terminal EN of the first power switch module 300 is enabled, so that an electric signal input from the input terminal VIN of the first power switch module 300 can be output from the output terminal VOUT of the first power switch module 300, at this time, current flowing from the output terminal VOUT of the first power switch module 300 to the output terminal VOUT of the second power switch module 400 flows from the output terminal VOUT of the second power switch module 400 to the GND of the second power switch module 400, and current cannot flow into the second input unit 200; when the second charging unit provides the electric energy to the second input unit 200, the current flows from the output terminal of the second input unit 200 to the input terminal VIN and the control terminal EN of the second power switch module 400, and the control terminal EN of the second power switch module 400 is enabled, so that the electric signal input from the input terminal VIN of the second power switch module 400 can be output from the output terminal VOUT of the second power switch module 400, at this time, the current flowing from the output terminal VOUT of the second power switch module 400 to the output terminal VOUT of the first power switch module 300 flows from the output terminal VOUT of the first power switch module 300 to the ground terminal GND of the first power switch module 300, and the current cannot flow into the first input unit 100. The first power switch module 300 and the second power switch module 400 both adopt SGM2578A chips to prevent reverse flow of current.
Referring to fig. 1, in some embodiments of the present invention, the first input unit 100 is a DC charging module, a positive output terminal of the DC charging module is connected to an input terminal of the first power switch module 300, and a negative output terminal of the DC charging module is connected to a ground line. In some embodiments, the first charging unit provides direct current to the DC direct current charging module. The positive input end of the DC direct current charging module is connected with the positive pole of the first charging unit, and the negative input end of the DC direct current charging module is connected with the negative pole of the first charging unit.
Referring to fig. 1, in some embodiments of the present invention, the second input unit 200 is a TYPE-C charging module. The TYPE-C charging module can realize quick charging of the wireless earphone, and charging efficiency is improved. It should be noted that, the first input unit 100 and the second input unit 200 may only be corresponding connection ports, that is, the charging circuit portion may not be part of the embodiment of the present invention.
The utility model discloses an in some embodiments, above-mentioned wireless earphone low dropout prevents flowing backward circuit still includes the magnetic bead FB3 of connection between the burden output end of DC direct current charging module and ground wire. The magnetic bead FB3 turns the alternating current signal of DC direct current charging module's negative output end output into heat energy, and is with low costs and facilitate the use, and the filtering high frequency noise effect is showing.
The utility model discloses an in some embodiments, above-mentioned wireless earphone low dropout prevents flowing backward circuit still includes the voltage stabilizing unit, has played the effect of stabilizing circuit voltage.
Referring to fig. 1, in some embodiments of the present invention, the voltage stabilizing unit includes a first voltage stabilizing unit D4 and a second voltage stabilizing unit D5, the first voltage stabilizing unit D4 is disposed between the negative output end of the DC charging module and the middle node of the first power switch module 300 and the ground line, the second voltage stabilizing unit D5 is disposed between the positive output end of the DC charging module and the middle node of the first power switch module 300 and the ground line, the protection of the circuit is realized, and the circuit voltage is stabilized.
In some embodiments, the voltage regulation unit employs a bidirectional electrostatic protection element, which can implement electrostatic protection. In some embodiments, the first and second voltage stabilizing units D4 and D5 employ electrostatic diodes of model RSD6325 FT.
In some embodiments of the present invention, the wireless headset low-voltage-difference backflow prevention circuit further includes a resistor R56 connected between the positive output terminal of the DC charging module and the intermediate node of the first power switch module 300 and the ground line. Prevent the circuit from being suddenly broken to cause the damage of the device.
The utility model discloses an in some embodiments, above-mentioned wireless earphone low dropout prevents flowing backward circuit still including connecting the DC direct current charge the positive output of module and the first electric capacity C86 between the intermediate node of first switch module 300 and the ground wire, alternating current can flow to the position of ground connection through first electric capacity C86, has played the effect of filtering.
In some embodiments of the present invention, the output unit 500 is a BQ25170DSGR model chip. The quick charging can be realized, and a certain protection effect on the circuit can be realized.
In some embodiments, the battery module of the wireless headset is a lithium battery. Referring to fig. 2, the BQ25170DSGR type chip has an IN terminal, an OUT terminal, an ISET terminal, a VSET terminal, a TS terminal, a/PG terminal, a GND terminal, and a STAT terminal. The IN terminal is connected to the output terminal of the first power switch module 300 and the output terminal of the second power switch module 400. The resistor R57 and the resistor R58 form a resistor series structure, one end of the resistor series structure is connected with the ISET end, and the other end of the resistor series structure is connected with the ground wire. And the TS end is electrically connected with the NTC end of the lithium battery and is used for monitoring the temperature. One end of the resistor R59 is connected with the VSET end, and the other end is used for connecting the ground wire. A resistor R60 and an LED1 connected in series are provided between the STAT terminal and the output terminals of the one and second power switch modules 400 for outputting a status indication. And the OUT terminal is connected with the BAT terminal of the lithium battery and is used for charging the input current of the lithium battery. The capacitor C146 disposed between the output unit 500 and the intermediate node of the lithium battery and the ground line and the resistor R102 disposed between the output unit 500 and the intermediate node of the lithium battery and the ground line protect the circuit.
Referring to fig. 1, in some embodiments of the present invention, the wireless headset low-voltage-difference backflow prevention circuit further includes a third capacitor C87 and a fourth capacitor C88 connected in parallel, the third capacitor C87 and the fourth capacitor C88 form a capacitor parallel structure, one end of the capacitor parallel structure is connected to the output end of the first power switch module 300, and the other end is used for connecting a ground wire. The capacitance parallel structure formed by the third capacitor C87 and the fourth capacitor C88 realizes the filtering effect on low-frequency and high-frequency signals, and removes the interference in the current.
In some embodiments of the present invention, the wireless earphone low-voltage difference backflow prevention circuit further includes a second capacitor C85 connected between the middle node of the second input unit 200 and the second power switch module 400 and the ground line, and the ac current flows to the ground through the second capacitor C85, thereby playing a role of filtering.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A wireless earphone low-voltage difference backflow prevention circuit is characterized by comprising:
a first input unit (100) with an input end connected with the first charging unit;
a second input unit (200) having an input terminal for connecting to a second charging unit; the first charging unit and the second charging unit are different types of charging devices;
a first power switch module (300) having an input terminal, an output terminal, and a control terminal, wherein the input terminal and the control terminal of the first power switch module (300) are electrically connected to the output terminal of the first input unit (100);
a second power switch module (400) having an input end, an output end, and a control end, wherein the input end and the control end of the second power switch module (400) are electrically connected to the output end of the second input unit (200);
the output unit (500) is provided with an input end and an output end, the input end of the output unit (500) is respectively connected with the output end of the first power switch module (300) and the output end of the second power switch module (400), and the output end of the output unit (500) is used for connecting a battery module of a wireless headset; the first power switch module (300) and the second power switch module (400) are both used for preventing current from flowing backwards.
2. The wireless headset low dropout backflow prevention circuit of claim 1 wherein the first power switch module (300) and the second power switch module (400) both employ SGM2578A type chips.
3. The wireless headset low-dropout backflow prevention circuit according to claim 1, wherein the first input unit (100) is a DC charging module, a positive output terminal of the DC charging module is connected to an input terminal of the first power switch module (300), and a negative output terminal of the DC charging module is connected to a ground line.
4. The wireless headset low dropout backflow prevention circuit of claim 3 further comprising a magnetic bead connected between the negative output terminal of the DC direct current charging module and ground.
5. The wireless headset low dropout backflow prevention circuit of claim 3, further comprising a voltage regulator unit.
6. The wireless headset low dropout backflow prevention circuit according to claim 5, wherein the voltage stabilization unit comprises a first voltage stabilization unit and a second voltage stabilization unit, the first voltage stabilization unit is disposed between the negative output terminal of the DC direct current charging module and a ground line, and the second voltage stabilization unit is disposed between the positive output terminal of the DC direct current charging module and a middle node of the first power switch module (300) and the ground line.
7. The wireless headset low dropout backflow prevention circuit of claim 3 further comprising a resistor connected between the positive output terminal of the DC direct current charging module and an intermediate node of the first power switch module (300) and ground.
8. The wireless headset low dropout backflow prevention circuit according to claim 1, wherein the output unit (500) is a BQ25170DSGR type chip.
9. The wireless earphone low-voltage-difference backflow prevention circuit according to claim 1, further comprising a third capacitor and a fourth capacitor connected in parallel, wherein the third capacitor and the fourth capacitor form a capacitor parallel structure, one end of the capacitor parallel structure is connected with the output end of the first power switch module (300), and the other end of the capacitor parallel structure is used for being connected with a ground wire.
10. The wireless headset low dropout backflow prevention circuit according to claim 1, wherein the second input unit (200) is a TYPE-C charging module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220660670.6U CN217240904U (en) | 2022-03-24 | 2022-03-24 | Wireless earphone low-pressure-difference backflow preventing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220660670.6U CN217240904U (en) | 2022-03-24 | 2022-03-24 | Wireless earphone low-pressure-difference backflow preventing circuit |
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| Publication Number | Publication Date |
|---|---|
| CN217240904U true CN217240904U (en) | 2022-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220660670.6U Active CN217240904U (en) | 2022-03-24 | 2022-03-24 | Wireless earphone low-pressure-difference backflow preventing circuit |
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| CN (1) | CN217240904U (en) |
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- 2022-03-24 CN CN202220660670.6U patent/CN217240904U/en active Active
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