CN213072163U - TWS storehouse electric quantity detection circuitry and TWS storehouse of charging - Google Patents
TWS storehouse electric quantity detection circuitry and TWS storehouse of charging Download PDFInfo
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- CN213072163U CN213072163U CN202021784079.9U CN202021784079U CN213072163U CN 213072163 U CN213072163 U CN 213072163U CN 202021784079 U CN202021784079 U CN 202021784079U CN 213072163 U CN213072163 U CN 213072163U
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Abstract
The utility model discloses a TWS charging bin electric quantity detection circuit, which is used for managing the electric quantity of a battery and an earphone and comprises a main control module, a charging control module and a terminal charging module; the main control module is connected with the charging control module and the terminal charging module and is used for controlling the charging control module and the terminal charging module and sampling electric quantity; the charging control module is connected with the terminal charging module and used for charging the battery and the earphone. The utility model discloses an adopt host system, independently program, including outlying charge and discharge circuit, realized the accurate battery power and the electric quantity of earphone that detect the storehouse of charging, bring the preferred for the user and experience.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a battery conversion field especially relates to a TWS storehouse electric quantity detection circuitry and TWS storehouse of charging.
[ background of the invention ]
The TWS Bluetooth headset is a real wireless stereo Bluetooth headset, and most of the TWS Bluetooth headsets adopt wireless and mutually independent Bluetooth headsets and a charging bin for charging the TWS Bluetooth headset. In the prior art, a TWS bluetooth headset is charged by using a headset cabin configured in the TWS bluetooth headset.
Because the TWS bluetooth headset is small and exquisite relatively, its inside can only hold the tiny battery, and the user is difficult to know accurately whether this TWS bluetooth headset's electric quantity is sufficient, leads to using this TWS bluetooth headset in-process to cause easily that experience is not good.
In addition with the current storehouse of charging that this TWS bluetooth headset matches, the battery power in storehouse of charging is judged only to the voltage value by the overwhelming majority, can often because the battery all has the phenomenon of voltage virtual height to and the battery in the storehouse of charging can be because the use is ageing, leads to the electric quantity to detect inaccurate. Therefore, a TWS charging bin electric quantity detection circuit and a TWS charging bin are needed.
[ Utility model ] content
Defect to above-mentioned prior art exists, the utility model provides a TWS storehouse electric quantity detection circuitry and TWS storehouse of charging to solve current technical problem.
The utility model provides a TWS charging bin electric quantity detection circuit, which is used for managing the electric quantity of a battery and an earphone and comprises a main control module, a charging control module and a terminal charging module; the main control module is connected with the charging control module and the terminal charging module and is used for controlling the charging control module and the terminal charging module and sampling electric quantity; and the charging control module is connected with the terminal charging module and is used for charging a battery and an earphone.
Further, the main control module comprises a main control chip U3, the main control chip U3 comprises a battery capacity detection pin and a plug detection pin, the charging control module comprises a USB connector, a battery sampling circuit, a charger plug detection circuit and a charging chip U1, the charging chip U1 comprises a charging ground pin, a charging input pin and a charging output pin, and the USB connector comprises a connector ground pin;
the first end of the battery sampling circuit is connected with the charging input pin, the second end of the battery sampling circuit is connected with the connector grounding pin, the third end of the battery sampling circuit is connected with the charging grounding pin, and the fourth end of the battery sampling circuit is connected with the battery electric quantity detection pin and is used for sampling whether the battery electric quantity is full;
the charger is pulled out and is inserted detection circuitry's first end and the output pin that charges is connected, the charger is pulled out and is inserted detection circuitry's second end and connector ground pin is connected, the charger is pulled out and is inserted detection circuitry third end and pull out and insert the detection pin and be connected for detect the charger and pull out the state of inserting.
Further, the battery sampling circuit includes a resistor R7, a resistor R25, a resistor R26, a resistor R27 and a capacitor C6, the first end of the resistor R7 is connected to the charging input pin, the second end of the resistor R7 is connected to the first end of the capacitor C6, the second end of the capacitor C6 is grounded to the first end of the resistor R25 and the first end of the resistor R26, the second end of the resistor R25 is connected to the connector ground pin, the second end of the resistor R26 and the first end of the resistor R27 are connected to the charging ground pin, and the second end of the resistor R27 is connected to the battery level detection pin.
Further, the charger plug detection circuit includes resistance R23 and resistance R24, the first end of resistance R23 with the output pin that charges is connected, the second end of resistance R23 with the first end of resistance R24 is connected, the second end of resistance R24 with connector ground pin connection.
Further, the charging control module comprises a charging input circuit and a battery power supply circuit, the charging chip U1 comprises a battery switch pin and a charging enable pin, and the USB connector comprises a connector power pin;
the first end of the charging input circuit is connected with the connector power pin, and the second end of the charging input circuit is connected with the charging input pin and is used for connecting or disconnecting an input power supply;
the battery power supply circuit is connected with the battery switch pin and the charging enable pin and is used for charging the battery.
Further, the USB connector further includes a connector address pin, the charging input circuit includes a switch Q1, a switch Q3, a switch Q4, a resistor R38, and a resistor R1, the drain of the switch Q1 is connected to the connector power pin, the source of the switch Q1 is connected to the first end of the resistor R38, the gate of the switch Q1 and the second end of the resistor R38 are connected to the gate of the switch Q4 and the connector address pin, the source of the switch Q3 is connected to the first end of the resistor R1 and the connector power pin, the gate of the switch Q3 and the second end of the resistor R1 are connected to the drain of the switch Q4, the source of the switch Q4 is connected to the connector ground pin, and the drain of the switch Q3 is connected to the charging input pin;
the battery power supply circuit comprises an inductor L1 and a capacitor C1, wherein a first end of the inductor L1 is connected with the battery switch pin, a second end of the inductor L1, a first end of the capacitor C1 and the charging enable pin are both connected with the positive pole of the battery, and a second end of the capacitor C1 is connected with the negative pole of the battery.
Further, the main control chip U3 includes an earphone power detection pin and a main control enable pin, and the terminal charging module includes an earphone power supply circuit and an earphone sampling circuit;
the first end of the earphone power supply circuit is connected with the charging output pin, the second end of the earphone power supply circuit is connected with the battery, the third end of the earphone power supply circuit is connected with the main control enabling pin, and the fourth end of the earphone power supply circuit is connected with the positive electrode of the earphone and used for charging the earphone;
the first end of the earphone sampling circuit is connected with the earphone electric quantity detection pin, the second end of the earphone sampling circuit is connected with the charging output pin, and the second end of the earphone sampling circuit is connected with the negative electrode of the earphone and used for detecting the electric quantity of the earphone.
Further, the earphone power supply circuit includes a diode D3, a resistor R37, a resistor R49, a resistor R48, a switch tube Q8 and a switch tube Q6, an anode of the diode D3 is connected to an anode of the battery, a cathode of the diode is connected to a first end of the resistor R37, a second end of the resistor R37, a first end of the resistor R49 and a source of the switch tube Q8 are connected to the charging output pin, a second end of the resistor R49 and a gate of the switch tube Q8 are connected to a first end of the resistor R48, a second end of the resistor R48 and a drain of the switch tube Q6 are connected to a source of the switch tube Q6 and a cathode of the battery, a gate of the switch tube Q6 is connected to the master control enable pin, and a drain of the switch tube Q8 is connected to an anode of the earphone;
the earphone sampling circuit comprises a resistor R2, a resistor R24, a resistor R5, a resistor R9, a resistor R11 and a resistor R12, wherein a first end of the resistor R2 is connected with the charging output pin, a second end of the resistor R2 and a first end of the resistor R4 are connected with the earphone electric quantity detection pin, and a second end of the resistor R4 and a first end of the resistor R5 are connected with the negative electrode of an earphone; the first end of resistance R9 with the output pin connection that charges, the second end of resistance R9 with the first end of resistance R11 with earphone electric quantity detection pin connection, the second end of resistance R11 with the first end of resistance R12 is connected with the negative pole of earphone, the second end of resistance R5 with the second end of resistance R12 all is ground connection.
Furthermore, the TWS charging bin electric quantity detection circuit further comprises a battery protection circuit, a battery port circuit and a display circuit, the main control chip U3 comprises a display pin and a battery port pin, the battery power supply circuit is connected with the battery port circuit through the battery protection circuit, and the display circuit is connected with the display pin;
the battery protection circuit comprises a protection chip U14, a resistor R36 and a capacitor C23, wherein the protection chip U14 comprises a protection power supply pin, a protection ground pin and a peak value pin, a first end of the resistor R36 is connected with the positive pole of a battery, a second end of the resistor R36 and a first end of the capacitor C23 are connected with the protection power supply pin, a second end of the capacitor C23 is connected with the protection ground pin, and the peak value pin is connected with the negative pole of the battery;
the battery port circuit comprises a battery connector J2 and a resistor R61, wherein a pin 1 of the battery connector J2 and a first end of the resistor R61 are connected with the positive pole of a battery, a pin 2 of the battery connector J2 and a second end of the resistor R61 are connected with the battery port pin, and a pin 3 of the battery connector J2 is connected with the negative pole of the battery.
The utility model also provides a TWS storehouse of charging uses TWS storehouse electric quantity detection circuitry that charges.
Compared with the prior art, the utility model provides a pair of TWS storehouse electric quantity detection circuitry and TWS storehouse of charging has following beneficial effect:
the utility model provides a TWS charging bin electric quantity detection circuit, which is used for managing the electric quantity of a battery and an earphone and comprises a main control module, a charging control module and a terminal charging module; the main control module is connected with the charging control module and the terminal charging module and is used for controlling the charging control module and the terminal charging module and sampling electric quantity; the charging control module is connected with the terminal charging module and used for charging the battery and the earphone. Through adopting host system, independently program, including outlying charge and discharge circuit, realized accurate battery power and the electric quantity of earphone that detects the storehouse of charging, bring preferred experience for the user.
[ description of the drawings ]
Fig. 1 is a block diagram of a TWS charging bin charge detection circuit of the present invention;
fig. 2 is a schematic diagram of a main control module in a TWS charging bin electric quantity detection circuit according to the present invention;
fig. 3 is a schematic diagram of a charging control module in a TWS charging bin electric quantity detection circuit according to the present invention;
fig. 4 is a schematic diagram of a terminal charging module in the TWS charging bin electric quantity detection circuit of the present invention;
fig. 5 is a schematic diagram of a battery protection circuit in the TWS charging bin electric quantity detection circuit of the present invention;
fig. 6 is a schematic diagram of a battery port circuit in the TWS charging bin power detection circuit of the present invention;
FIG. 7 is a schematic diagram of a display circuit in a TWS charging bin electric quantity detection circuit according to the present invention;
description of reference numerals:
10. a TWS charging bin electric quantity detection circuit; 11. a main control module; 12. a charging control module; 13. a terminal charging module; 14. a battery protection circuit; 15. a battery port circuit; 16. a display circuit; 121. a charging input circuit; 122. a charger plug detection circuit; 123. a battery sampling circuit; 124. a battery power supply circuit; 125. a USB connector; 131. an earphone power supply circuit; 132. an earphone sampling circuit.
[ detailed description ] embodiments
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, the utility model provides a TWS charging bin electric quantity detection circuit 10 for managing the electric quantity of batteries and earphones, which includes a main control module 11, a charging control module 12 and a terminal charging module 13; the main control module 11 is connected to both the charging control module 12 and the terminal charging module 13, and is configured to control the charging control module 12 and the terminal charging module 13, and sample electric quantity; the charging control module 12 is connected to the terminal charging module 13 for charging the battery and the earphone.
Referring to fig. 2 and 3, the main control module 11 includes a main control chip U3, the main control chip U3 includes a battery level detection pin and a plug detection pin, the charging control module 12 includes a USB connector 125, a battery sampling circuit 123, a charger plug detection circuit 122 and a charging chip U1, the charging chip U1 includes a charging ground pin, a charging input pin and a charging output pin, the USB connector 125 includes a connector ground pin, and the USB connector 125 is used for connecting an external charger.
The first end of the battery sampling circuit 123 is connected to the charging input pin, the second end of the battery sampling circuit 123 is connected to the connector ground pin, the third end of the battery sampling circuit 123 is connected to the charging ground pin, and the fourth end of the battery sampling circuit 123 and the battery capacity detection pin are used for sampling whether the battery capacity is full.
The utility model provides a specific embodiment of this battery sampling circuit 123, this battery sampling circuit 123 includes resistance R7, resistance R25, resistance R26, resistance R27 and electric capacity C6, this resistance R7's first end and this input pin connection that charges, this resistance R7's second end is connected with this electric capacity C6's first end, this electric capacity C6's second end and this resistance R25's first end and this resistance R26's first end are all grounded, this resistance R25's second end and this connector ground pin connection, this ground pin that charges is all connected to this resistance R26's second end and this resistance R27's first end, this resistance R27's second end and this battery power detection pin connection.
Referring to fig. 2 and fig. 3, a first terminal of the charger plug detection circuit 122 is connected to the charging output pin, a second terminal of the charger plug detection circuit 122 is connected to the connector ground pin, and a third terminal of the charger plug detection circuit 122 is connected to the plug detection pin for detecting a charger plug state.
The utility model provides a detection circuitry 122 is inserted to this charger pull out a concrete embodiment, and this charger pull out inserts detection circuitry 122 includes resistance R23 and resistance R24, and this resistance R23's first end and this output pin that charges are connected, and this resistance R23's second end is connected with this resistance R24's first end, and this resistance R24's second end and this connector ground pin are connected.
Referring to fig. 3, the charging control module 12 includes a charging input circuit 121 and a battery power supply circuit 124, the charging chip U1 includes a battery switch pin and a charging enable pin, and the USB connector 125 includes a connector power pin. A first end of the charging input circuit 121 is connected to the connector power pin, and a second end of the charging input circuit 121 is connected to the charging input pin for connecting or disconnecting an input power; the battery power supply circuit 124 is connected to the battery switch pin and the charge enable pin for charging the battery.
The utility model provides a specific embodiment of this input circuit 121 charges, this USB connector 125 further includes the connector address pin, this input circuit 121 charges includes switch tube Q1, switch tube Q3, switch tube Q4, resistance R38 and resistance R1, this switch tube Q1's drain electrode is connected with this connector power pin, this switch tube Q1's source electrode is connected with this resistance R38's first end, this switch tube Q1's grid and this resistance R38's second end and this switch tube Q4's grid and this connector address pin are connected, this switch tube Q3's source electrode is connected with this resistance R1's first end and this connector power pin, this switch tube Q3's grid and this resistance R1's second end are connected with this switch tube Q4's drain electrode, this switch tube Q4's source electrode and this connector ground pin are connected, this switch tube Q3's drain electrode is connected with this input pin that charges.
The utility model provides a specific embodiment of this battery supply circuit 124, this battery supply circuit 124 include inductance L1 and electric capacity C1, and this inductance L1's first end and this battery switch pin are connected, and this inductance L1's second end and this electric capacity C1's first end and this enable pin that charges all are connected with the positive pole of battery, the negative pole of this electric capacity C1's second termination battery.
Referring to fig. 2 and 4, the main control chip U3 includes an earphone power detection pin and a main control enable pin, and the terminal charging module 13 includes an earphone power supply circuit 131 and an earphone sampling circuit 132.
The first end of the earphone power supply circuit 131 is connected to the charging output pin, the second end of the earphone power supply circuit 131 is connected to the battery, the third end of the earphone power supply circuit 131 is connected to the master control enable pin, and the fourth end of the earphone power supply circuit 131 is connected to the positive pole of the earphone for charging the earphone.
The first end of the earphone sampling circuit 132 is connected with the earphone electric quantity detection pin, the second end of the earphone sampling circuit 132 is connected with the charging output pin, and the second end of the earphone sampling circuit 132 is connected with the negative pole of the earphone for detecting the electric quantity of the earphone.
The utility model provides a specific embodiment of this earphone supply circuit 131, this earphone supply circuit 131 includes diode D3, resistance R37, resistance R49, resistance R48, switch tube Q8 and switch tube Q6, this diode D3's positive pole is connected with the positive pole of battery, the negative pole of this diode is connected with the first end of this resistance R37, the first end of this resistance R37 and this resistance R49 and the source electrode of switch tube Q8 are connected with this output pin that charges, the second end of this resistance R49 and the grid of this switch tube Q8 are connected with the first end of resistance R48, the second end of this resistance R48 is connected with the drain electrode of switch tube Q6 and is connected the source electrode of this switch tube Q6 and the negative pole of battery, the grid of this switch tube Q6 is connected with this master control enables the pin, the drain electrode of this switch tube Q8 is connected with the positive pole of earphone.
The utility model provides a specific embodiment of this earphone sampling circuit 132, this earphone sampling circuit 132 includes resistance R2, resistance R24, resistance R5, resistance R9, resistance R11 and resistance R12, this resistance R2's first end and this output pin that charges are connected, this resistance R2's second end and this resistance R4's first end and this earphone electric quantity detection pin are connected, this resistance R4's second end and this resistance R5's first end are connected with the negative pole of earphone; the first end of the resistor R9 is connected to the charging output pin, the second end of the resistor R9 and the first end of the resistor R11 are connected to the earphone power detection pin, the second end of the resistor R11 and the first end of the resistor R12 are connected to the negative electrode of the earphone, and the second end of the resistor R5 and the second end of the resistor R12 are both grounded.
Referring to fig. 5, the TWS charging bin electric quantity detection circuit 10 further includes a battery protection circuit 14 and a battery port circuit 15, and the battery power supply circuit 124 is connected to the battery port circuit 15 through the battery protection circuit 14.
The utility model provides a specific embodiment of this battery protection circuit 14, this battery protection circuit 14 is including protection chip U14, resistance R36 and electric capacity C23, this protection chip U14 includes the protection power supply pin, protection ground pin and peak value pin, this resistance R36's first end is connected with the positive pole of battery, this resistance R36's second end and electric capacity C23's first end and this protection power supply pin are connected, this electric capacity C23's second end and this protection ground pin are connected, this peak value pin is connected with the negative pole of battery.
Referring to fig. 2, the main control chip U3 includes a battery port pin, the present invention provides an embodiment of the battery port circuit 15, the battery port circuit 15 includes a battery connector J2 and a resistor R61, a pin 1 of the battery connector J2 and a first end of the resistor R61 are connected to a positive electrode of a battery, a pin 2 of the battery connector J2 and a second end of the resistor R61 are connected to the battery port pin, and a pin 3 of the battery connector J2 is connected to a negative electrode of the battery.
Referring to fig. 2, the main control chip U3 includes a display pin, referring to fig. 6, the TWS charging bin electric quantity detection circuit 10 further includes a display circuit 16, and the display circuit 16 is connected to the display pin for displaying the electric quantity of the battery. Further, the display circuit 16 includes an LED, a first terminal of the LED is connected to the display pin, and a second terminal of the LED is grounded.
The utility model also provides a TWS storehouse of charging uses this TWS storehouse electric quantity detection circuitry 10 that charges.
It should be noted that, with reference to all the above-mentioned figures, the present invention provides a display pin generally indicating a circuit network number LED1, LED2, LED3, LED4, LED5 and LED6, an earphone power detection pin generally indicating a network number TEST1 and TEST2, a battery power detection pin generally indicating a network number CHRCT, a plug detection pin generally indicating a network number OUTCT, a master control enable pin generally indicating a network number CHG _ EN, and a charging input pin generally indicating VOUT.
It should be noted that the descriptions of the first end, the second end, the third end and the fourth end of the present invention belong to the descriptions commonly found in the field of electronic circuits, and are descriptions taken for the convenience of describing the connection between modules in the modularization process of the electronic circuits.
The above description is only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the utility model, or the direct or indirect application in other related technical fields, are included in the patent protection scope of the utility model.
Claims (10)
1. The utility model provides a TWS storehouse electric quantity detection circuitry that charges for manage the electric quantity of battery and earphone, its characterized in that: the system comprises a main control module, a charging control module and a terminal charging module;
the main control module is connected with the charging control module and the terminal charging module and is used for controlling the charging control module and the terminal charging module and sampling electric quantity;
and the charging control module is connected with the terminal charging module and is used for charging a battery and an earphone.
2. The TWS charge bin charge amount detection circuit of claim 1, wherein: the main control module comprises a main control chip U3, the main control chip U3 comprises a battery electric quantity detection pin and a plug detection pin, the charging control module comprises a USB connector, a battery sampling circuit, a charger plug detection circuit and a charging chip U1, the charging chip U1 comprises a charging grounding pin, a charging input pin and a charging output pin, and the USB connector comprises a connector grounding pin;
the first end of the battery sampling circuit is connected with the charging input pin, the second end of the battery sampling circuit is connected with the connector grounding pin, the third end of the battery sampling circuit is connected with the charging grounding pin, and the fourth end of the battery sampling circuit is connected with the battery electric quantity detection pin and is used for sampling whether the battery electric quantity is full;
the charger is pulled out and is inserted detection circuitry's first end and the output pin that charges is connected, the charger is pulled out and is inserted detection circuitry's second end and connector ground pin is connected, the charger is pulled out and is inserted detection circuitry third end and pull out and insert the detection pin and be connected for detect the charger and pull out the state of inserting.
3. The TWS charge bin charge amount detection circuit of claim 2, wherein: the battery sampling circuit comprises a resistor R7, a resistor R25, a resistor R26, a resistor R27 and a capacitor C6, the first end of the resistor R7 is connected with the charging input pin, the second end of the resistor R7 is connected with the first end of the capacitor C6, the second end of the capacitor C6 is connected with the first end of the resistor R25 and the first end of the resistor R26 are all grounded, the second end of the resistor R25 is connected with the connector grounding pin, the second end of the resistor R26 is connected with the first end of the resistor R27 is connected with the charging grounding pin, and the second end of the resistor R27 is connected with the battery capacity detection pin.
4. The TWS charge bin charge amount detection circuit of claim 2, wherein: the charger is pulled out and is inserted detection circuitry includes resistance R23 and resistance R24, the first end of resistance R23 with the output pin connection that charges, the second end of resistance R23 with the first end of resistance R24 is connected, the second end of resistance R24 with connector ground pin connects.
5. The TWS charge bin charge amount detection circuit of claim 2, wherein: the charging control module comprises a charging input circuit and a battery power supply circuit, the charging chip U1 comprises a battery switch pin and a charging enable pin, and the USB connector comprises a connector power pin;
the first end of the charging input circuit is connected with the connector power pin, and the second end of the charging input circuit is connected with the charging input pin and is used for connecting or disconnecting an input power supply;
the battery power supply circuit is connected with the battery switch pin and the charging enable pin and is used for charging the battery.
6. The TWS charge bin charge amount detection circuit of claim 5, wherein: the USB connector further includes a connector address pin, the charging input circuit includes a switch Q1, a switch Q3, a switch Q4, a resistor R38, and a resistor R1, the drain of the switch Q1 is connected to the connector power pin, the source of the switch Q1 is connected to the first end of the resistor R38, the gate of the switch Q1 and the second end of the resistor R38 are connected to the gate of the switch Q4 and the connector address pin, the source of the switch Q3 is connected to the first end of the resistor R1 and the connector power pin, the gate of the switch Q3 and the second end of the resistor R1 are connected to the drain of the switch Q4, the source of the switch Q4 is connected to the connector ground pin, and the drain of the switch Q3 is connected to the charging input pin;
the battery power supply circuit comprises an inductor L1 and a capacitor C1, wherein a first end of the inductor L1 is connected with the battery switch pin, a second end of the inductor L1, a first end of the capacitor C1 and the charging enable pin are both connected with the positive pole of the battery, and a second end of the capacitor C1 is connected with the negative pole of the battery.
7. The TWS charge bin charge amount detection circuit of claim 2, wherein: the main control chip U3 comprises an earphone electric quantity detection pin and a main control enabling pin, and the terminal charging module comprises an earphone power supply circuit and an earphone sampling circuit;
the first end of the earphone power supply circuit is connected with the charging output pin, the second end of the earphone power supply circuit is connected with the battery, the third end of the earphone power supply circuit is connected with the main control enabling pin, and the fourth end of the earphone power supply circuit is connected with the positive electrode of the earphone and used for charging the earphone;
the first end of the earphone sampling circuit is connected with the earphone electric quantity detection pin, the second end of the earphone sampling circuit is connected with the charging output pin, and the second end of the earphone sampling circuit is connected with the negative pole of the earphone and used for detecting the electric quantity of the earphone.
8. The TWS charge bin charge amount detection circuit of claim 7, wherein: the earphone power supply circuit comprises a diode D3, a resistor R37, a resistor R49, a resistor R48, a switch tube Q8 and a switch tube Q6, wherein the anode of the diode D3 is connected with the anode of a battery, the cathode of the diode is connected with the first end of the resistor R37, the second end of the resistor R37, the first end of the resistor R49 and the source of the switch tube Q8 are connected with the charging output pin, the second end of the resistor R49 and the gate of the switch tube Q8 are connected with the first end of the resistor R48, the second end of the resistor R48 and the drain of the switch tube Q6 are connected with the source of the switch tube Q6 and the cathode of the battery, the gate of the switch tube Q6 is connected with the master control enable pin, and the drain of the switch tube Q8 is connected with the anode of an earphone;
the earphone sampling circuit comprises a resistor R2, a resistor R24, a resistor R5, a resistor R9, a resistor R11 and a resistor R12, wherein a first end of the resistor R2 is connected with the charging output pin, a second end of the resistor R2 and a first end of the resistor R4 are connected with the earphone electric quantity detection pin, and a second end of the resistor R4 and a first end of the resistor R5 are connected with the negative electrode of an earphone; the first end of resistance R9 with the output pin connection that charges, the second end of resistance R9 with the first end of resistance R11 with earphone electric quantity detection pin connection, the second end of resistance R11 with the first end of resistance R12 is connected with the negative pole of earphone, the second end of resistance R5 with the second end of resistance R12 all is ground connection.
9. The TWS charge bin charge amount detection circuit of claim 5, wherein: the TWS charging bin electric quantity detection circuit further comprises a battery protection circuit, a battery port circuit and a display circuit, the main control chip U3 comprises a display pin and a battery port pin, the battery power supply circuit is connected with the battery port circuit through the battery protection circuit, and the display circuit is connected with the display pin;
the battery protection circuit comprises a protection chip U14, a resistor R36 and a capacitor C23, wherein the protection chip U14 comprises a protection power supply pin, a protection ground pin and a peak value pin, a first end of the resistor R36 is connected with the positive pole of a battery, a second end of the resistor R36 and a first end of the capacitor C23 are connected with the protection power supply pin, a second end of the capacitor C23 is connected with the protection ground pin, and the peak value pin is connected with the negative pole of the battery;
the battery port circuit comprises a battery connector J2 and a resistor R61, wherein a pin 1 of the battery connector J2 and a first end of the resistor R61 are connected with the positive pole of a battery, a pin 2 of the battery connector J2 and a second end of the resistor R61 are connected with the battery port pin, and a pin 3 of the battery connector J2 is connected with the negative pole of the battery.
10. A TWS storehouse of charging which characterized in that: use of the TWS charge bin charge detection circuit of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021784079.9U CN213072163U (en) | 2020-08-24 | 2020-08-24 | TWS storehouse electric quantity detection circuitry and TWS storehouse of charging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021784079.9U CN213072163U (en) | 2020-08-24 | 2020-08-24 | TWS storehouse electric quantity detection circuitry and TWS storehouse of charging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213072163U true CN213072163U (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021784079.9U Expired - Fee Related CN213072163U (en) | 2020-08-24 | 2020-08-24 | TWS storehouse electric quantity detection circuitry and TWS storehouse of charging |
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| Country | Link |
|---|---|
| CN (1) | CN213072163U (en) |
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2020
- 2020-08-24 CN CN202021784079.9U patent/CN213072163U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210427 |