CN114362509A - Dynamic voltage switching device, TWS chip and TWS equipment - Google Patents
Dynamic voltage switching device, TWS chip and TWS equipment Download PDFInfo
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- 238000001514 detection method Methods 0.000 claims abstract description 39
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 10
- 230000005611 electricity Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 9
- 230000007958 sleep Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 230000005059 dormancy Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
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- 238000007689 inspection Methods 0.000 description 1
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Abstract
The invention discloses a dynamic voltage switching device, a TWS chip and TWS equipment, wherein the dynamic voltage switching device comprises: the voltage detection module is connected with a VBUS end of the TWS equipment and used for detecting the voltage of the VBUS end to obtain a detection result; and the voltage conversion module is connected with the VBUS terminal, the voltage detection module and a VBUS functional circuit of the TWS equipment and is used for controlling input impedance according to the detection result so as to control the voltage input from the VBUS terminal to the VBUS functional circuit. The invention realizes the reduction of the power consumption of the circuit.
Description
Technical Field
The present invention relates to a wireless stereo device, and more particularly, to a dynamic voltage switching device, a TWS chip and a TWS device.
Background
The TWS true wireless Bluetooth headset is one of the most explosive electronic products at present. Over the years of technical iteration, the experience requirements of users on products are higher and higher, wherein low power consumption is a topic which cannot be bypassed by the product experience. The low power consumption has a plurality of sub-fields from the technical point of view, such as the working endurance (generally several hours) of the TWS headset itself, the sleep endurance (generally monthly) of the headset, and the sleep endurance (generally monthly) of the charging chamber.
The dormant endurance of the charging bin is special, relates to both the charging bin and the earphone (the charging bin can provide a level to a VBUS of the earphone to maintain the shutdown state of the earphone when the charging bin without a Hall is dormant, so that the VBUS of the earphone can leak the electricity of the charging bin, and is also called as the power consumption of the VBUS of the earphone), the charging bin is also responsible for controlling the on-off reset and the like of the earphone besides charging the earphone (for example, the charging bin with the Hall requires the earphone to be opened immediately after the earphone is opened, and the earphone can be opened after the earphone is taken out from the bin without the Hall), in other words, if the charging bin is not electrified, the earphone can not be opened, so that the dormant endurance of the charging bin relates to an important experience index that a user or a testing and goods side can directly use the product without charging after the product is taken for the first time, the TWS earphone and the charging bin can have about 80% of electricity when the product leaves a factory, and the product is half a year or more long week if the testing goods side is short, particularly, when the earphone arrives at a overseas goods inspection party, the earphone cannot be directly used due to the fact that the charging bin is not electrically charged, and then goods can be directly returned, and great economic loss is brought. Therefore, the dormant power consumption of the TWS earphone product is also a key object of the original design of each large chip. The VBUS power consumption of the earphone is the most special place, and relates to the cooperation of the charging bin and the earphone.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a dynamic voltage switching device, a TWS chip and a TWS device, which can reduce power consumption.
An embodiment of the present invention provides a dynamic voltage switching apparatus for a TWS device, including: the voltage detection module is connected with a VBUS end of the TWS equipment and used for detecting the voltage of the VBUS end to obtain a detection result; and the voltage conversion module is connected with the VBUS terminal, the voltage detection module and a VBUS functional circuit of the TWS equipment and is used for controlling input impedance according to the detection result so as to control the voltage input from the VBUS terminal to the VBUS functional circuit.
According to some embodiments of the invention, the voltage detection module comprises: and a first input end of the voltage comparator is connected with a reference voltage, a second input end of the voltage comparator is connected with the VBUS end, and an output end of the voltage comparator is connected with the voltage conversion module.
According to some embodiments of the invention, the voltage conversion module comprises: the logic control unit is connected with the voltage detection module; the switch combination unit is connected with the logic control unit and comprises a plurality of switches and a plurality of resistors connected with the switches in series; and the logic control unit is used for controlling the switch in the switch combination to be switched on or switched off according to the detection result of the voltage detection module.
Another aspect of the embodiments of the present invention provides a dynamic voltage switching apparatus for a TWS device, including: the device comprises a voltage comparator, a logic control unit, a plurality of switches and a plurality of resistors; a first input end of the voltage comparator is connected with a VBUS end of the TWS equipment, a second input end of the voltage comparator is connected with a reference voltage, and an output end of the voltage comparator is connected with the logic control unit; the switches are connected in parallel, the first ends of the switches are connected with the logic control unit, and the second ends of the switches are connected with the resistor or the VBUS end; the logic controller is connected with a VBUS functional circuit of the TWS equipment and is used for controlling the plurality of switches to be opened or closed.
According to some embodiments of the invention, the number of switches comprises: the first switch, the second switch, the third switch, the fourth switch and the fifth switch; the plurality of resistors comprises: the circuit comprises a first resistor, a second resistor, a third resistor and a fourth resistor; the first switch is connected with the first resistor; the second switch is connected with the second resistor; the third switch is connected with the third resistor; the fourth switch is connected with the fourth resistor; and the first end of the fifth switch is connected with the logic control unit, and the second end of the fifth switch is connected with the VBUS end.
In another aspect, an embodiment of the present invention provides a TWS chip, including: a VBUS terminal, a VBUS functional circuit, and the aforementioned dynamic voltage switching device, which connects the VBUS terminal and the VBUS functional circuit.
According to some embodiments of the invention, the VBUS function circuitry comprises one or more of: the circuit comprises a charging circuit, a wake-up circuit with various level combinations, a voltage-withstanding circuit, a single-wire one-way communication circuit, a forced reset circuit, a single-wire two-way communication circuit and a plug-in detection circuit.
In another aspect, an embodiment of the present invention provides a TWS device, including: the TWS chip as described hereinbefore.
The embodiment of the invention at least comprises the following beneficial effects: according to the embodiment of the invention, the high voltage of the VBUS is dynamically converted into the intermediate circuit by dynamically controlling the circuit of the VBUS functional module, so that the power consumption of the circuit is reduced.
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/or 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 diagram of the interaction of a TWS headset with a cartridge;
FIG. 2 is an internal schematic view of a TWS chip without the addition of the device of the present invention;
FIG. 3 is a block schematic diagram of an apparatus of an embodiment of the invention;
FIG. 4 is a block diagram of a voltage detection module according to an embodiment of the present invention;
FIG. 5 is a block diagram of a voltage switching module according to an embodiment of the present invention;
FIG. 6 is a block diagram of an apparatus according to another embodiment of the present invention;
FIG. 7 is a block diagram of a TWS chip according to an embodiment of the invention.
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 or similar 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
TWS: true wireless Stereo headphones;
VBUS: a power line;
VBUS functional circuit: the circuit comprises a charger circuit for charging the earphone, a wake-up circuit with various level combinations, a voltage-withstanding circuit, a single-wire one-way communication circuit, a forced reset circuit, a single-wire two-way communication circuit, a plug-in detection circuit and the like.
At present, the most common method is that the voltage supplied to the VBUS of the earphone after the earphone is dormant is reduced to an intermediate level of about 3V from 5V, so that the power of the VBUS end of the earphone leaking to the cabin end can be reduced to a great extent. The advantage of this kind of scheme is that dormancy consumption can be accomplished very little, but the disadvantage is that the storehouse still needs extra design earphone plug detection circuitry (the storehouse dormancy detects that earphone goes out the storehouse and goes into the storehouse and need step up the intermediate level to 5V and charge for the earphone), and the earphone plug of different families detects still can have the compatibility problem, has promoted the complexity for the design anyhow, and the product also has certain stability hidden danger.
In addition, the chamber keeps 5V output to the VBUS end of the earphone whether the chamber is in sleep or not, the scheme has the advantages that the chamber is extremely simple in design and is stable and reliable, and the disadvantage is that the electricity for leaking the chamber of the VBUS of the earphone can be very large, and the electricity for leaking the chamber of the VBUS end of the earphone can be very large (several times or even dozens of times larger than the electricity for leaking the chamber of the VBUS end of the earphone) compared with the electricity for outputting the 5V to the VBUS end of the earphone can be very large (the electricity for leaking the chamber of the VBUS end of the earphone can be usually 5ua, and the electricity for leaking the chamber of the 5V can be even hundreds of ua), so that the method has very high requirements on the design of the VBUS leakage of the earphone.
The current practice has the following disadvantages: firstly, when the earphone and the bin are dormant, the leakage of electricity is large when the VBUS end is 5V, the bin with the middle level is needed to be adopted for avoiding the problem, the functions of plugging and unplugging detection and the like are involved, the design difficulty of the bin is increased, the cost of the whole machine is increased, and meanwhile, the reliability risk is increased. And secondly, although the leakage is acceptable when the VBUS end is 5V when most of the earphones and the cabin are in the sleep state, the leakage is a little bit (about 5ua to 10 ua) larger than the middle level, and the sleep duration of the cabin is several months shorter than the middle level.
The common method of each chip original factory at present is to optimize the electric leakage of an internal circuit under the condition that VBUS is 5V to the utmost extent, most manufacturers are optimized to be within a reasonable range, but the electric leakage is a little bit larger than the electric leakage of the VBUS which is a middle level (the middle level is about 5ua, and 5V is about 10 ua).
The invention aims to solve the problem of leakage of the earphone VBUS during the sleep of the cabin, and can realize the same leakage of the earphone VBUS under the condition that the cabin output is 5V and the middle level. The core idea of the invention is dynamic voltage switching, the VBUS voltage for the earphone when the earphone chip end monitors the sleep of the cabin, and the switching circuit is started to dynamically switch the high level into the middle level after the VBUS voltage is monitored to be larger than a certain threshold value, so as to realize the electric leakage which is the same as the middle level.
Referring to fig. 1, fig. 1 is an interactive schematic diagram of a charging chamber and an earphone, wherein VOUT _ L/VOUT _ R of the charging chamber outputs 5V to charge VBUS of left and right ears of the earphone, respectively. The cabin supplies power to the earphone, the cabin and the earphone are both dormant after the earphone is fully charged, the cabin can output a level to the earphone to maintain the shutdown dormant state of the earphone at the moment, and the earphone is started when the VBUS pin of the earphone detects the voltage extraction after the earphone is taken out of the cabin. The output level of VOUT _ L/VOUT _ R of the cabin after both the cabin and the earphone are in the range of 2V-5V generally, so that the VBUS pin of the earphone can eat the electricity or the electricity called as cabin leakage electricity, the higher the voltage is, the larger the electricity leakage is, the highest voltage is generally 5V, and when the VBUS output to the earphone in the cabin sleep mode is 5V, the electricity consumption of the earphone can not meet the shipping requirement if the electricity consumption reaches more than hundred ua. The invention aims to solve the problem that the power consumption of the earphone can reach about 5ua as the power consumption of the middle level.
Referring to fig. 2, fig. 2 is a schematic diagram of an original VBUS-related circuit inside a chip, that is, a block diagram of the circuit of the present invention is not added, and it is currently common practice to optimize a VBUS functional circuit extremely to ensure that power consumption is small enough when VBUS is 5V. However, in the actual TWS earphone chip, VBUS looks like a pin from the outside of the chip, but the functional circuits inside the chip, which is the only pin interacting with the charging bin, become more and more complex, the VBUS functional circuits relate to a charger circuit for charging the earphone, various level combination wake-up circuits, voltage-withstanding circuits, single-wire one-way communication circuits, forced reset circuits, single-wire two-way communication circuits, plugging detection circuits and the like, each circuit has few na-level consumption and more ua-level consumption even in a low power consumption mode when the VBUS is at a high voltage of 5V, and may reach dozens or even hundreds of ua consumption, so that the VBUS functional circuits are extremely complicated in power consumption optimization, analog chip design engineers in the chip foundries are a not trivial challenge, so it is extremely challenging to optimize the power consumption of VBUS from the source in general.
The invention changes an angle to optimize the VBUS extremely power consumption, simplifies the complex problem, realizes the dimension reduction and solves the problem, keeps the original VBUS functional circuit completely still, adds the dynamic voltage switching circuit to realize the conversion from the current-limiting high voltage to the low voltage, and ensures that the power consumption equivalent to the intermediate level can be still maintained under the condition that the VBUS is 5V high voltage when the earphone end is dormant again. The key point of the invention is that the conversion idea converts the high voltage dynamic of the VBUS into the middle level to realize the extreme power consumption optimization of the VBUS, but not directly optimize the power consumption of each sub-module circuit of the VBUS under 5V.
Referring to fig. 3, an embodiment of the present invention provides a dynamic voltage switching apparatus, including a voltage detection module, connected to a VBUS terminal of a TWS device, and configured to detect a voltage at the VBUS terminal to obtain a detection result; and the voltage conversion module is connected with the VBUS terminal, the voltage detection module and the VBUS functional circuit of the TWS device and is used for controlling the input impedance according to the detection result so as to control the voltage input from the VBUS terminal to the VBUS functional circuit. According to the embodiment of the invention, the voltage of the VBUS for supplying power to the TWS equipment is detected, if the voltage is higher than the reference voltage, the high voltage is converted into the middle level, and the conversion mode is that the voltage input to the VBUS functional circuit is controlled by controlling the input impedance, so that the power consumption of the VBUS is reduced.
Referring to fig. 4, in some embodiments, the voltage detection module includes: and a first input end of the voltage comparator is connected with the reference voltage, a second input end of the voltage comparator is connected with the VBUS end, and an output end of the voltage comparator is connected with the voltage conversion module. The VBUS voltage can be compared with the reference voltage by the voltage comparator to determine whether voltage conversion is required.
Referring to fig. 5, in some embodiments, the voltage conversion module includes: the logic control unit is connected with the voltage detection module; the switch combination unit is connected with the logic control unit and comprises a plurality of switches and a plurality of resistors connected with the switches in series; and the logic control unit is used for controlling the switch in the switch combination to be opened or closed according to the detection result of the voltage detection module. According to the embodiment of the invention, through switch combination, the input impedance is controlled by controlling the on and off of a plurality of parallel switches, so that voltage conversion is realized.
In some embodiments, the dynamic voltage switching device of the present invention comprises: the device comprises a voltage comparator, a logic control unit, a plurality of switches and a plurality of resistors; the first input end of the voltage comparator is connected with the VBUS end of the TWS equipment, the second input end of the voltage comparator is connected with the reference voltage, and the output end of the voltage comparator is connected with the logic control unit; the switches are connected in parallel, the first end of each switch is connected with the logic control unit, and the second end of each switch is connected with the resistor or the VBUS end; the logic controller is connected with a VBUS functional circuit of the TWS device and is used for controlling the plurality of switches to be opened or closed.
Referring to fig. 6, in a specific embodiment, the voltage detection portion is composed of a VBUS voltage detection portion and a voltage conversion portion, the voltage detection portion is used for detecting the VBUS voltage after the earphone is powered off and is dormant, and when the VBUS voltage is greater than a set threshold, a signal is output to the logic control portion to achieve voltage switching. The principle of voltage switching is also simple and intuitive, the principle is that a plurality of switch combinations (SW 1-SW 4) are controlled to control the input impedance to be dynamically controlled, and then the voltage to be sent to the VBUS function circuit is dynamically controlled through voltage division of the VBUS function circuit, for example, when the voltage of VBUS is 5V after the earphone is detected to be in a shutdown sleep state, the SW5 is started, namely the current limiting resistor R3 is started, the current is limited to be less than 5ua, and meanwhile, the voltage to be input to the VBUS function circuit is also reduced to an intermediate level from 5V. If the VBUS is detected to be 3V at the intermediate level after the earphone is powered off and sleeps, the SW1 is started to directly send the 3V of the VBUS to the VBUS function circuit. If the VBUS is detected to be a higher middle level 4.2V after the earphone is powered off and dormant, the SW2 is selected to select the R0 to further control the voltage, so that the 4.2V of the VBUS is reduced to 3V after dynamic voltage division and then is sent to the VBUS function circuit. The invention can realize that the VBUS voltage is in a constant ultra-low power consumption state in the usable range (2V-5V range) after the earphone is powered off and dormant.
Referring to fig. 7, the TWS chip of the embodiment of the invention includes a VBUS terminal, a VBUS functional circuit, and the dynamic voltage switching device of the previous embodiment, which is connected to the VBUS terminal and the VBUS functional circuit.
The VBUS function circuit of the present embodiment includes one or more of the following: the circuit comprises a charging circuit, a wake-up circuit with various level combinations, a voltage-withstanding circuit, a single-wire one-way communication circuit, a forced reset circuit, a single-wire two-way communication circuit and a plug-in detection circuit.
An embodiment of the present invention further provides a TWS device, including the TWS chip in the foregoing embodiment.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. A dynamic voltage switching apparatus for a TWS device, comprising:
the voltage detection module is connected with a VBUS end of the TWS equipment and used for detecting the voltage of the VBUS end to obtain a detection result;
and the voltage conversion module is connected with the VBUS terminal, the voltage detection module and a VBUS functional circuit of the TWS equipment and is used for controlling input impedance according to the detection result so as to control the voltage input from the VBUS terminal to the VBUS functional circuit.
2. The dynamic voltage switching device of claim 1, wherein the voltage detection module comprises:
and a first input end of the voltage comparator is connected with a reference voltage, a second input end of the voltage comparator is connected with the VBUS end, and an output end of the voltage comparator is connected with the voltage conversion module.
3. The dynamic voltage switching device of claim 1, wherein the voltage conversion module comprises:
the logic control unit is connected with the voltage detection module;
the switch combination unit is connected with the logic control unit and comprises a plurality of switches and a plurality of resistors connected with the switches in series;
and the logic control unit is used for controlling the switch in the switch combination to be switched on or switched off according to the detection result of the voltage detection module.
4. A dynamic voltage switching apparatus for a TWS device, comprising:
the device comprises a voltage comparator, a logic control unit, a plurality of switches and a plurality of resistors;
a first input end of the voltage comparator is connected with a VBUS end of the TWS equipment, a second input end of the voltage comparator is connected with a reference voltage, and an output end of the voltage comparator is connected with the logic control unit;
the switches are connected in parallel, the first ends of the switches are connected with the logic control unit, and the second ends of the switches are connected with the resistor or the VBUS end;
the logic controller is connected with a VBUS functional circuit of the TWS equipment and is used for controlling the plurality of switches to be opened or closed.
5. The dynamic voltage switching device of claim 4, wherein the number of switches comprises: the first switch, the second switch, the third switch, the fourth switch and the fifth switch; the plurality of resistors comprises: the circuit comprises a first resistor, a second resistor, a third resistor and a fourth resistor;
the first switch is connected with the first resistor; the second switch is connected with the second resistor; the third switch is connected with the third resistor; the fourth switch is connected with the fourth resistor; and the first end of the fifth switch is connected with the logic control unit, and the second end of the fifth switch is connected with the VBUS end.
6. A TWS chip, comprising:
VBUS terminal, VBUS functional circuit, and
the dynamic voltage switching device of any of claims 1 to 5, which connects the VBUS terminal and the VBUS functional circuit.
7. The TWS chip of claim 6, wherein the VBUS function circuitry comprises one or more of:
the circuit comprises a charging circuit, a wake-up circuit with various level combinations, a voltage-withstanding circuit, a single-wire one-way communication circuit, a forced reset circuit, a single-wire two-way communication circuit and a plug-in detection circuit.
8. A TWS device, comprising:
the TWS chip of any one of claims 6 to 7.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114839571A (en) * | 2022-06-30 | 2022-08-02 | 深圳英集芯科技股份有限公司 | Circuit for detecting plugging and unplugging of equipment and electronic equipment |
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