CN214154081U

CN214154081U - Charging management circuit of earphone charging box

Info

Publication number: CN214154081U
Application number: CN202023178451.4U
Authority: CN
Inventors: 苏汉征
Original assignee: Dongguan Yuelian Electronic Technology Co ltd
Current assignee: Dongguan Yuelian Electronic Technology Co ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-09-07
Anticipated expiration: 2030-12-25

Abstract

The utility model relates to a charge management technical field, concretely relates to earphone charging box's charge management circuit, including input circuit, charge and discharge management circuit, instruct management circuit, overflow overvoltage crowbar, supply circuit, breathing lamp circuit, pilot lamp circuit and output circuit, input circuit and overflow overvoltage crowbar electric connection, charge and discharge management circuit respectively with overflow overvoltage crowbar, instruct management circuit, supply circuit and output circuit electric connection, breathing lamp circuit and instruct management circuit electric connection, supply circuit still with instruct management circuit and pilot lamp circuit electric connection. Therefore, the electric quantity of the wireless earphone is detected through the charging and discharging management circuit, and the electric quantity information is transmitted to the indication management circuit to control the breathing lamp circuit and the indication lamp circuit to display correspondingly, so that a user can know whether the wireless earphone is charged clearly, and the electric quantity information of the wireless earphone can be acquired conveniently and quickly.

Description

Charging management circuit of earphone charging box

Technical Field

The utility model relates to a charge management technical field, concretely relates to earphone charging box's charge management circuit.

Background

With the rapid development of earphone technology, wireless earphones gradually appear, and due to the advantage of convenience in carrying, the wireless earphones are used more and more frequently in various occasions. The wireless earphone has limited capacity of a battery, and the wireless earphone needs to be plugged in a charging box for charging. The existing charging boxes on the market at present only have a simple charging function, and a user cannot simply and clearly know the current circuit of the wireless earphone in the charging box, so that the use of the user is inconvenient.

Therefore, there is a need in the industry for a solution to the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a charging management circuit of earphone charging box to prior art not enough. The purpose of the utility model can be realized by the technical scheme as follows.

A charging management circuit of an earphone charging box comprises an input circuit, a charging and discharging management circuit, an indication management circuit, an overcurrent and overvoltage protection circuit, a power supply circuit, a breathing lamp circuit, an indication lamp circuit and an output circuit, wherein the input circuit is electrically connected with the overcurrent and overvoltage protection circuit, the charging and discharging management circuit is respectively electrically connected with the overcurrent and overvoltage protection circuit, the indication management circuit, the power supply circuit and the indication lamp circuit, the input circuit inputs a direct current power supply to the overcurrent and overvoltage protection circuit and then transmits the direct current power supply to the charging and discharging management circuit after the overcurrent and overvoltage protection circuit is processed, the charging and discharging management circuit outputs signals to the power supply circuit and drives the power supply circuit to supply power to the indication management circuit and the indication lamp circuit, and the charging and discharging management circuit detects the electric quantity of the wireless earphone and transmits electric quantity information to the indication management circuit to control the breathing lamp circuit and the indication lamp circuit to display correspondingly.

Preferably, the over-current and over-voltage protection circuit comprises an LP5300 chip and a capacitor C14, wherein a first pin, a second pin, a fifth pin and a sixth pin of the LP5300 chip are electrically connected with a GND ground, a third pin of the LP5300 chip is electrically connected with the input circuit, a fourth pin of the LP5300 chip is connected with a capacitor C14, and the other end of the capacitor C14 is connected with the GND ground.

Preferably, the charge and discharge management circuit includes an ETA9640 chip, a capacitor C13, a capacitor C11, an inductor 4R7, a resistor R4, and a battery BT1, wherein the second pin and the third pin of the ETA9640 chip are both connected to a positive electrode of the battery BT1, a negative electrode of the battery BT1 is connected to a GND ground, the second pin and the third pin of the ETA9640 chip are also connected to one end of the capacitor C11, the other end of the capacitor C11 is connected to the GND ground, the fourth pin of the ETA9640 chip is connected to one end of the inductor 4R7, the other end of the inductor 4R7 is connected to a positive electrode of the battery BT1, the fifth pin of the ETA9640 chip outputs a charging voltage to charge the earphone, the fifth pin of the ETA9640 chip is also connected to one end of the capacitor C13, the other end of the capacitor C13 is connected to the ground, the sixth pin of the ETA9640 chip is electrically connected to the ground, the seventh pin of the ETA9640 chip is electrically connected to the GND terminal, the eighth pin of the ETA9640 chip is electrically connected to the GND terminal 4, the other end of the resistor R4 is connected to GND ground.

Preferably, the indication management circuit includes a CST801S chip, a capacitor C2, a resistor R1 and a resistor R7, a first pin of the CST801S chip is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to a GND ground, a third pin of the CST801S chip is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the charge and discharge management circuit, the third pin of the CST801S chip is further connected to one end of the resistor R7, the other end of the resistor R7 is connected to the GND ground, a second pin, a fourth pin, a sixth pin and a seventh pin of the CST801S chip are respectively and electrically connected to different indication branches of the indication lamp circuit, a fifth pin of the CST801S chip is electrically connected to the breathing lamp circuit, and an eighth pin of the CST801S chip is electrically connected to the ground.

Preferably, the indicating lamp circuit comprises a first LED lamp, a second LED lamp, a third LED lamp, a fourth LED lamp, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, the anode of the first LED lamp is electrically connected with one end of a resistor R6, the cathode of the first LED lamp is electrically connected with the seventh pin of the CST801S chip, the anode of the second LED lamp is electrically connected with one end of the resistor R7, the cathode of the second LED lamp is electrically connected with the sixth pin of the CST801S chip, the anode of the third LED lamp is electrically connected with one end of a resistor R8, the cathode of the third LED lamp is electrically connected with the second pin of the CST801S chip, the anode of the fourth LED lamp is electrically connected with one end of a resistor R9, the cathode of the fourth LED lamp is electrically connected with the fourth pin of the CST801S chip, the other end of the resistor R6, the other end of the resistor R7, the other end of the resistor R8 and the other end of the resistor R9 are connected with the positive electrode of the battery BT 1.

Preferably, the breathing lamp circuit comprises a breathing lamp D1, the positive electrode of the breathing lamp D1 is electrically connected with one end of a resistor R5, the negative electrode of the breathing lamp D1 is electrically connected with the fifth pin of the CST801S chip, and the other end of the resistor R5 is connected with the positive electrode of a battery BT 1.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a charging management circuit of earphone charging box has researched and developed, the electric quantity that detects wireless earphone through the charging and discharging management circuit and transmit electric quantity information and control breathing lamp circuit and indicator lamp circuit for instructing management circuit and do corresponding demonstration, can let the user clearly know whether wireless earphone is charging, but also can acquire wireless earphone's electric quantity information convenient and fast ground.

Drawings

For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a charging management circuit according to an embodiment of the present invention.

Fig. 2 is a circuit diagram of an input circuit and an overcurrent and overvoltage protection circuit according to an embodiment of the present invention.

Fig. 3 is a circuit diagram of a charge and discharge management circuit according to an embodiment of the present invention.

Fig. 4 is a circuit diagram of an indication management circuit according to an embodiment of the present invention.

Fig. 5 is a circuit diagram of an indicator light circuit according to an embodiment of the present invention.

Fig. 6 is a circuit diagram of a breathing lamp circuit in an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A charging management circuit of an earphone charging box is shown in figure 1 and comprises an input circuit 1, a charging and discharging management circuit 4, an indication management circuit 5, an overcurrent and overvoltage protection circuit 2, a power supply circuit 3, a breathing lamp circuit 6, an indicator lamp circuit 7 and an output circuit 8, wherein the input circuit 1 is used for inputting working voltage, the overcurrent and overvoltage protection circuit 2 is used for protecting each circuit from being damaged by voltage and current which are not in a rated range, the charging and discharging management circuit 4 manages charging and discharging information, the indicator lamp circuit 7 is used for controlling the breathing lamp circuit 6 and the indicator lamp circuit 7 to display corresponding information, and the power supply circuit 3 is mainly a DC3.7v lithium battery and used for supplying power to the indication management circuit 5 and the indicator lamp circuit 7. The input circuit 1 is electrically connected with the over-current and over-voltage protection circuit 2, and the over-current and over-voltage protection circuit 2 detects the voltage and current of the input circuit 1, so that the input voltage and current are prevented from exceeding a rated range to cause damage to each circuit. The charge and discharge management circuit 4 is electrically connected with the overcurrent and overvoltage protection circuit 2, the indication management circuit 5, the power supply circuit 3 and the output circuit 8 respectively, so that charge and discharge management is performed. The breathing lamp circuit 6 is electrically connected with the indication management circuit 5, so that the indication management circuit 5 can control the breathing lamp circuit 6 to be turned on to indicate normal operation when charging and discharging. The power supply circuit 3 is also electrically connected with the indication management circuit 5 and the indicator light circuit 7 and supplies power for the operation of the indication management circuit 5 and the indicator light circuit 7. The input circuit 1 inputs a direct current power supply to the over-current and over-voltage protection circuit 2, the direct current power supply is processed and then transmitted to the charge and discharge management circuit 4, the charge and discharge management circuit 4 outputs signals to the power supply circuit 3 and drives the power supply circuit 3 to supply power to the indication management circuit 5 and the indicator light circuit 7, and the charge and discharge management circuit 4 detects the electric quantity of the wireless earphone and transmits electric quantity information to the indication management circuit 5 to control the breathing light circuit 6 and the indicator light circuit 7 to display correspondingly.

Specifically, the input circuit 1 inputs the voltage of DC4.6v-36v to the over-current and over-voltage protection circuit 2, the over-current and over-voltage protection circuit 2 protects each circuit from being damaged by voltage and current out of a rated range, when the input voltage is determined to be in the rated range, the charging and discharging management circuit 4 performs synchronous boosting to drive the power supply circuit 3 to supply power to the indication management circuit 5 and the indication lamp circuit 7 on one hand, controls the output circuit 8 to output the voltage of DC5v to charge the wireless headset on the other hand, and simultaneously transmits the power information of the wireless headset to the indication management circuit 5, the indication management circuit 5 judges whether the charging and discharging management circuit 4 works on one hand, if the charging and discharging management circuit works, emits flickering light like human breathing frequency to represent normal work, and the indication management circuit 5 acquires the power information of the wireless headset transmitted by the charging and discharging management circuit 4 on the other hand, and controls the indicator light circuit 7 to perform corresponding display according to the electric quantity information. Therefore, the electric quantity of the wireless earphone is detected through the charging and discharging management circuit 4, and the electric quantity information is transmitted to the indication management circuit 5 to control the breathing lamp circuit 6 and the indication lamp circuit 7 to display correspondingly, so that a user can know whether the wireless earphone is charged clearly, and the electric quantity information of the wireless earphone can be acquired conveniently and quickly.

In the charging management circuit of the charging box for the earphone provided in this embodiment, as shown in fig. 2, the over-current and over-voltage protection circuit 2 includes a LP5300 chip and a capacitor C14, a first pin, a second pin, a fifth pin, and a sixth pin of the LP5300 chip are electrically connected to a GND ground, a third pin of the LP5300 chip is electrically connected to the input circuit 1, a fourth pin of the LP5300 chip is connected to a capacitor C14, and the other end of the capacitor C14 is connected to the GND ground.

In the charging management circuit of the charging box for the earphone provided in this embodiment, as shown in fig. 3, the charging and discharging management circuit 4 includes an ETA9640 chip, a capacitor C13, a capacitor C11, an inductor 4R7, a resistor R4, and a battery BT1, wherein a second pin and a third pin of the ETA9640 chip are both connected to a positive electrode of a battery BT1, a negative electrode of a battery BT1 is connected to a GND ground terminal, the second pin and the third pin of the ETA9640 chip are also connected to one end of a capacitor C11, the other end of the capacitor C11 is connected to the GND ground terminal, a fourth pin of the ETA9640 chip is connected to one end of an inductor 4R7, the other end of the inductor 4R7 is connected to a positive electrode of a battery BT1, a fifth pin of the ETA9640 chip outputs a charging voltage to the earphone, and the fifth pin of the ETA9640 chip is also connected to one end of a capacitor C13, the other end of a capacitor C13 is connected to the ground terminal, and the sixth pin of the ETA9640 chip is electrically connected to the GND terminal, and the seventh pin 965 is electrically connected to the GND terminal of the ETA chip, the eighth pin of the ETA9640 chip is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with a GND ground end.

Specifically, the ETA9640 chip may detect the battery voltage of the wireless headset, and when the ETA9640 chip detects that the battery voltage of the wireless headset is 3.0v-3.3v, the fifth pin outputs a one-second high level and a one-second low level to the indication management circuit 5 to indicate that the battery power of the wireless headset is less than or equal to 25%; when the ETA9640 chip detects that the battery voltage of the wireless earphone is 3.3v-3.6v, a one-second high level and a one-second low level are output to the indication management circuit 5 for two times continuously to indicate that the battery capacity of the wireless earphone is more than 25% and less than or equal to 50%; when the ETA9640 chip detects that the battery voltage of the wireless earphone is 3.6v-3.9v, outputting a one-second high level and a one-second low level to the indication management circuit 5 for three times to indicate that the battery capacity of the wireless earphone is more than 50% and less than or equal to 75%; when the ETA9640 chip detects that the battery voltage of the wireless earphone is 3.9v-4.1v, outputting a one-second high level and a one-second low level to the indication management circuit 5 for four times continuously to indicate that the battery capacity of the wireless earphone is more than 75% and less than or equal to 99%; when the ETA9640 chip detects that the battery voltage of the wireless headset is 4.2v, only a high level is output to the indication management circuit 5 to indicate that the battery capacity of the wireless headset is 100%, so that the indication management circuit 5 can conveniently acquire the capacity information and control the indicator light circuit 7 to display.

As shown in fig. 4, the indication management circuit 5 includes a CST801S chip, a capacitor C2, a resistor R1, and a resistor R7, a first pin of the CST801S chip is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to a GND ground, a third pin of the CST801S chip is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the charge and discharge management circuit 4, the third pin of the CST801S chip is further connected to one end of a resistor R7, the other end of the resistor R7 is connected to the GND ground, a second pin, a fourth pin, a sixth pin, and a seventh pin of the CST801S chip 387 are respectively electrically connected to different indication branches of the indication lamp circuit 7, a fifth pin of the CST801S chip is electrically connected to the breathing lamp circuit 6, and an eighth pin of the CST801S chip is electrically connected to the GND ground. Specifically, the CST801S chip controls the indicator light circuit 7 to indicate accordingly according to the received ETA9640 chip high-low level signal.

In the charging management circuit of the charging box for the earphone provided in this embodiment, as shown in fig. 5, the indicator light circuit 7 includes a first LED light, a second LED light, a third LED light, a fourth LED light, a resistor R6, a resistor R7, a resistor R8, and a resistor R9, an anode of the first LED light is electrically connected to one end of the resistor R6, a cathode of the first LED light is electrically connected to a seventh pin of the CST801S chip, an anode of the second LED light is electrically connected to one end of the resistor R7, a cathode of the second LED light is electrically connected to a sixth pin of the CST801S chip, an anode of the third LED light is electrically connected to one end of the resistor R8, a cathode of the third LED light is electrically connected to a second pin of the CST801S chip, an anode of the fourth LED light is electrically connected to one end of the resistor R9, a cathode of the fourth LED light is electrically connected to a CST S, and a cathode of the other end of the fourth LED light is electrically connected to a resistor R7 of the CST801 chip, The other end of the resistor R8 and the other end of the resistor R9 are both connected to the positive electrode of the battery BT 1. The breathing lamp circuit 6 comprises a breathing lamp D1, as shown in FIG. 6, the positive electrode of the breathing lamp D1 is electrically connected with one end of a resistor R5, the negative electrode of the breathing lamp D1 is electrically connected with the fifth pin of the CST801S chip, and the other end of the resistor R5 is connected with the positive electrode of a battery BT 1.

Since the ETA9640 chip can only light one LED lamp to indicate the electric quantity, and the design requires four lamps to indicate the electric quantity, one CST801S chip is externally hung to control four ways. Specifically, the indication management circuit 5 controls according to the high-low level condition transmitted by the charge-discharge management circuit 4, when the indication management circuit 5 receives the high level for one second and the low level for one second at a time, the battery power of the wireless earphone is less than or equal to 25%, and the first LED lamp is controlled to flicker; when the indication management circuit 5 receives a high level for one second and a low level for one second twice, the battery power of the wireless earphone is more than 25% and less than or equal to 50%, the first LED lamp is controlled to be on, and the second LED lamp is controlled to flicker; when the indication management circuit 5 receives a high level for three times, one second and a low level for one second, the battery power of the wireless earphone is more than 50% and less than or equal to 75%, the first LED lamp and the second LED lamp are controlled to be on, and the third LED lamp flickers; when the indication management circuit 5 receives four times of one second high level and one second low level, the battery power of the wireless earphone is more than 75% and less than or equal to 99%, the first LED lamp, the second LED lamp and the third LED lamp are controlled to be on, and the fourth LED lamp flickers; when the indication management circuit 5 only receives a high level, the battery power of the wireless headset is 100%, and the first LED lamp, the second LED lamp, the third LED lamp and the fourth LED lamp are on. Meanwhile, as long as the indication management circuit 5 receives a high level, the operation is indicated, and the breathing lamp is controlled to start to be on.

The present invention has been further described with reference to specific embodiments, but it should be understood that the specific description herein should not be construed as limiting the spirit and scope of the present invention, and that various modifications to the above-described embodiments, which would occur to persons skilled in the art after reading this specification, are within the scope of the present invention.

Claims

1. A charging management circuit of an earphone charging box is characterized by comprising an input circuit, a charging and discharging management circuit, an indication management circuit, an overcurrent and overvoltage protection circuit, a power supply circuit, a breathing lamp circuit, an indicator lamp circuit and an output circuit, wherein the input circuit is electrically connected with the overcurrent and overvoltage protection circuit, the charging and discharging management circuit is respectively electrically connected with the overcurrent and overvoltage protection circuit, the indication management circuit, the power supply circuit and the indicator lamp circuit, the breathing lamp circuit is electrically connected with the indication management circuit, the power supply circuit is also electrically connected with the indication management circuit and the indicator lamp circuit, the input circuit inputs a direct current power supply to the overcurrent and overvoltage protection circuit and transmits the processed direct current power supply to the charging and discharging management circuit, the charging and discharging management circuit outputs signals to the power supply circuit and drives the power supply circuit to supply power to the indication management circuit and the indicator lamp circuit, and the charging and discharging management circuit detects the electric quantity of the wireless earphone and transmits electric quantity information to the indication management circuit to control the breathing lamp circuit and the indication lamp circuit to display correspondingly.

2. The charging management circuit of an earphone charging box according to claim 1, wherein the over-current and over-voltage protection circuit comprises a LP5300 chip and a capacitor C14, the first pin, the second pin, the fifth pin and the sixth pin of the LP5300 chip are electrically connected to a GND ground, the third pin of the LP5300 chip is electrically connected to the input circuit, the fourth pin of the LP5300 chip is connected to a capacitor C14, and the other end of the capacitor C14 is connected to the GND ground.

3. The charging management circuit of claim 1, wherein the charging management circuit comprises an ETA9640 chip, a capacitor C13, a capacitor C11, an inductor 4R7, a resistor R4 and a battery BT1, wherein the second pin and the third pin of the ETA9640 chip are both connected to the positive electrode of the battery BT1, the negative electrode of the battery BT1 is connected to the GND ground, the second pin and the third pin of the ETA9640 chip are also connected to one end of the capacitor C11, the other end of the capacitor C11 is connected to the GND ground, the fourth pin of the ETA9640 chip is connected to one end of the inductor 4R7, the other end of the inductor 4R7 is connected to the positive electrode of the battery BT1, the fifth pin of the ETA9640 chip outputs a charging voltage to the earphone, the fifth pin of the ETA9640 chip is further connected to one end of the capacitor C13, the other end of the capacitor C13 is connected to the ground, the sixth pin of the ETA9640 chip is electrically connected to the GND terminal of the ETA9640 chip, and the seventh pin is electrically connected to the GND management circuit, the eighth pin of the ETA9640 chip is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with a GND ground end.

4. The charging management circuit of an earphone charging box according to claim 1, wherein the indication management circuit comprises a CST801S chip, a capacitor C2, a resistor R1 and a resistor R7, the first pin of the CST801S chip is connected to one end of the capacitor C2, the other end of the capacitor C2 is connected to a GND ground, the third pin of the CST801S chip is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the charging and discharging management circuit, the third pin of the CST801S chip is further connected to one end of the resistor R7, the other end of the resistor R7 is connected to the GND ground, the second pin, the fourth pin, the sixth pin and the seventh pin of the CST801S chip are respectively electrically connected to different indication branches of the indication lamp circuit, the fifth pin of the CST801S chip is electrically connected to the breathing lamp circuit, and the eighth pin of the CST801S chip is electrically connected to the GND ground.

5. The charging management circuit of an earphone charging box according to claim 4, wherein the indicator light circuit comprises a first LED light, a second LED light, a third LED light, a fourth LED light, a resistor R6, a resistor R7, a resistor R8 and a resistor R9, wherein the anode of the first LED light is electrically connected to one end of the resistor R6, the cathode of the first LED light is electrically connected to the seventh pin of the CST801S chip, the anode of the second LED light is electrically connected to one end of the resistor R7, the cathode of the second LED light is electrically connected to the sixth pin of the CST801S chip, the anode of the third LED light is electrically connected to one end of the resistor R8, the cathode of the third LED light is electrically connected to the second pin of the CST801S chip, the anode of the fourth LED light is electrically connected to one end of the resistor R9, the cathode of the fourth LED light is electrically connected to the third pin 801 of the resistor R801S, and the other end of the resistor R7 is electrically connected to the other end of the resistor R6, The other end of the resistor R8 and the other end of the resistor R9 are both connected to the positive electrode of the battery BT 1.

6. The charging management circuit of an earphone charging box according to claim 4, wherein the breathing lamp circuit comprises a breathing lamp D1, the positive pole of the breathing lamp D1 is electrically connected with one end of a resistor R5, the negative pole of the breathing lamp D1 is electrically connected with the fifth pin of the CST801S chip, and the other end of the resistor R5 is connected with the positive pole of a battery BT 1.