Charging bin control circuit

Abstract

The utility model provides a charging bin control circuit which is used for charging a wireless pickup device, the wireless pickup device comprises a first transmitter, a second transmitter and a receiver, the circuit comprises a power supply chip which comprises a first charging output end, a second charging output end and a first power supply output end, the first charging output end is electrically connected with the first transmitter, and the second charging output end is electrically connected with the second transmitter; the switching circuit comprises a power supply input end, a power supply output end and a control end, the power supply input end is electrically connected with the first power supply output end of the power supply chip, and the power supply output end is electrically connected with the receiver; and the controller is electrically connected with the control end of the switching circuit and is in communication connection with the power supply chip. According to the utility model, the structure of the charging bin control circuit can be simplified, and the stability of products is improved.

Description

Technical Field

[0001] The present application relates to the field of charging bin control technology, and in particular to a charging bin control circuit. Background Art

[0002] Most existing charging pod control solutions for lavalier wireless microphones use the power supply solution commonly used in Bluetooth headset charging pods. This solution's power supply chip is only equipped with two controllable charging outputs, one for each Bluetooth headset. Wireless lavalier microphones are typically in a one-to-two configuration, with one receiver and two transmitters. Therefore, three controllable charging outputs are required to charge them. Currently, most similar products on the market use two of these power supply chips to build a charging pod control circuit, with one power supply chip responsible for charging the two transmitters and the other for charging the receiver. Alternatively, other charging circuits designed based on solutions not specifically designed for charging pods are used. This complicates the charging pod control circuit structure and increases power consumption, reducing the stability of the charging pod control circuit during operation and increasing material costs. Utility Model Content

[0003] An embodiment of the present application provides a charging compartment control circuit to solve the problems existing in the above-mentioned prior art.

[0004] The charging compartment control circuit provided in an embodiment of the present application is used to charge a wireless sound pickup device, wherein the wireless sound pickup device includes a first transmitter, a second transmitter, and a receiver, wherein the circuit includes:

[0005] a power supply chip, comprising a first charging output terminal, a second charging output terminal, and a first power output terminal, wherein the first charging output terminal is electrically connected to the first transmitter, and the second charging output terminal is electrically connected to the second transmitter;

[0006] a switch circuit, comprising a power supply input terminal, a power supply output terminal, and a control terminal, wherein the power supply input terminal is electrically connected to the first power supply output terminal of the power supply chip, and the power supply output terminal is electrically connected to the receiver;

[0007] a controller, electrically connected to the control end of the switch circuit and communicatively connected to the power supply chip;

[0008] The switch circuit switches between on and off states according to a control signal sent by a controller.

[0009] Optionally, the charging compartment control circuit also includes a rechargeable battery.

[0010] Optionally, the charging compartment control circuit further includes an access detection circuit, which is electrically connected to the power supply output end of the switch circuit, the rechargeable battery and the controller.

[0011] Furthermore, the access detection circuit includes a sixth resistor, a first diode and a fifth resistor connected in series in sequence, wherein the positive electrode of the first diode is electrically connected to the rechargeable battery through the sixth resistor, the negative electrode of the first diode is electrically connected to the controller through the fifth resistor, and the negative electrode of the first diode is also electrically connected to the power supply output end of the switching circuit.

[0012] Furthermore, the switching circuit includes a first transistor, a second transistor, a third transistor, a first resistor, a second resistor and a third resistor, wherein the drain of the first transistor serves as the power supply input end of the switching circuit and is electrically connected to the first power supply output end of the power supply chip, the source of the first transistor is electrically connected to the source of the second transistor, the gate of the first transistor is connected to the gate of the second transistor, the first resistor is connected between the source and the gate of the first transistor, the drain of the second transistor serves as the power supply output end of the switching circuit and is electrically connected to the receiver, the gate of the third transistor is electrically connected to the controller via the second resistor, the drain of the third transistor is electrically connected to the gate of the first transistor, the source of the third transistor is grounded, and the third resistor is connected between the gate of the third transistor and the ground.

[0013] Furthermore, the charging compartment control circuit also includes a feedback resistor, one end of the feedback resistor is grounded, and the other end of the feedback resistor is electrically connected to the negative pole of the charging input end of the receiver and the controller.

[0014] Furthermore, the charging compartment control circuit also includes an input terminal for connecting to an external power adapter.

[0015] Furthermore, the charging case control circuit also includes a first inductor, a first capacitor, a second capacitor and a third capacitor, wherein the first inductor and the first capacitor are connected in series between the power supply chip and the ground in sequence, and the second capacitor and the third capacitor are connected in parallel between the first power output terminal of the power supply chip and the ground.

[0016] It can be seen that the charging bin control circuit provided in the embodiment of the present application charges the first transmitter and the second transmitter respectively through the first charging output terminal and the second charging output terminal of the power supply chip, and is electrically connected to the transmitter through a switching circuit controlled by a controller. The controller controls the working state of the switching circuit to charge the transmitter, thereby realizing that a single power supply chip is used to charge the first transmitter, the second transmitter and the receiver at the same time, thereby simplifying the structure of the charging bin control circuit, reducing product costs, and improving product stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 This is a circuit block diagram of a charging compartment control circuit provided in an embodiment of the present application;

[0019] Figure 2 yes Figure 1 Circuit diagram of the switch circuit and access detection circuit in FIG;

[0020] Figure 3 This is a circuit diagram of a BOOST boost circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0024] The charging pod control circuit provided in an embodiment of the present application is used to charge a wireless sound pickup device, which is a two-in-one lavalier wireless microphone. The lavalier microphone includes a first transmitter and a second transmitter for picking up voice signals, and a receiver for receiving voice signals. The charging pod control circuit provided in an embodiment of the present application can simultaneously charge the first transmitter, the second transmitter, and the receiver.

[0025] First, see Figure 1 , Figure 1This is a circuit block diagram of a charging compartment control circuit provided in an embodiment of the present application.

[0026] like Figure 1 As shown, the charging compartment control circuit provided in the embodiment of the present application is used to charge a wireless sound pickup device, which includes a first transmitter 11, a second transmitter 12 and a receiver 13. The charging compartment control circuit 100 provided in the embodiment of the present application includes a power supply chip 20, a switching circuit 30 and a controller 40.

[0027] The power supply chip 20 includes a first charging output terminal 21, a second charging output terminal 22, and a first power output terminal 23. The first charging output terminal 21 is electrically connected to the first transmitter 11 to charge the first transmitter 11, and the second charging output terminal 22 is electrically connected to the second transmitter 12 to charge the second transmitter 12. The switching circuit 30 includes a power supply input terminal 32, a power supply output terminal 33, and a control terminal 31. The power supply input terminal 32 is electrically connected to the first power output terminal 23 of the power supply chip 20, and the power supply output terminal 33 is electrically connected to the receiver 13 to charge the receiver 13. The power supply chip 20 can be a power supply chip 20 for various types of Bluetooth headset charging cases.

[0028] The controller 40 is electrically connected to the control terminal 31 of the switching circuit 30 and is in communication with the power supply chip 20. The switching circuit 30 switches between on and off states based on a control signal from the controller 40. The controller 40 can also be configured to issue instructions to the power supply chip 20 to configure parameters such as the output power of the power supply chip 20. The controller 40 can be implemented using a single-chip microcomputer, a microprocessor, a programmable logic device, or the like. The switching circuit 30 can be implemented using various metal oxide field-effect transistors, bipolar transistors, junction field-effect transistors, and other components.

[0029] It can be seen that the charging bin control circuit 100 provided in the embodiment of the present application charges the first transmitter 11 and the second transmitter 12 respectively through the first charging output terminal 21 and the second charging output terminal 22 of the power supply chip 20, and is electrically connected to the transmitter through the switching circuit 30. The controller 40 controls the working state of the switching circuit 30 to charge the transmitter, thereby realizing that a single power supply chip 20 is used to charge the first transmitter 11, the second transmitter 12 and the receiver 13 at the same time, thereby simplifying the structure of the charging bin control circuit 100, reducing product costs, and improving product stability.

[0030] In some embodiments, the charging compartment control circuit 100 further includes a rechargeable battery 50. The rechargeable battery 50 can be used to power the charging compartment control circuit 100, and the charging compartment control circuit 100 can charge the rechargeable battery 50. The rechargeable battery 50 can be, for example, a lithium battery or a nickel-metal hydride battery.

[0031] In some embodiments, the charging compartment control circuit 100 further includes an access detection circuit 60, which is electrically connected to the power supply output terminal 33 of the switch circuit 30, the rechargeable battery 50, and the controller 40. After the receiver 13 is connected to the power supply output terminal 33 of the switch circuit 30 (i.e., enters the charging compartment for charging), the access detection circuit 60 generates an access signal (e.g., a high level or a low level) and sends it to the controller 40. The controller 40 can generate a corresponding control signal (e.g., a high level or a low level) according to the access signal and send it to the control terminal 31 of the switch circuit 30, thereby making the switch circuit 30 work in a conducting state. In this way, the power supply chip 20 can provide power to the receiver 13 through the first power output terminal 23 through the switch circuit 30, thereby powering the receiver 13.

[0032] Also refer to Figure 2 In some embodiments, the access detection circuit 60 includes a sixth resistor R6, a first diode D1, and a fifth resistor R5 connected in series. The anode of the first diode D1 is electrically connected to the rechargeable battery 50 via the sixth resistor R6, and the cathode of the first diode D1 is electrically connected to the INOUTDET pin of the controller 40 via the fifth resistor R5. The cathode of the first diode D1 is also electrically connected to the power output terminal 33 of the switch circuit 30. When the receiver 13 is connected to the power output terminal 33 of the switch circuit 30, the access detection circuit 60 generates an access signal at the INOUTDET pin of the controller 40 via the fifth resistor R5. Upon detecting the presence of the access signal at the INOUTDET pin, the controller 40 issues a control signal to turn on the switch circuit 30.

[0033] Continue to refer Figure 2In some embodiments, the switch circuit 30 includes a first transistor Q1, a second transistor Q2, a third transistor Q3, a first resistor R1, a second resistor R2, and a third resistor R3, wherein the drain of the first transistor Q1 serves as the power supply input terminal 32 of the switch circuit 30 and is electrically connected to the first power supply output terminal 23 of the power supply chip 20, the source of the first transistor Q1 is electrically connected to the source of the second transistor Q2, the gate of the first transistor Q1 is connected to the gate of the second transistor Q2, and the drain of the first transistor Q1 serves as the power supply input terminal 32 of the switch circuit 30 and is electrically connected to the first power supply output terminal 23 of the power supply chip 20, the source of the first transistor Q1 is electrically connected to the source of the second transistor Q2, and the gate of the first transistor Q1 is connected to the gate of the second transistor Q2. A resistor R1 is connected between the source and gate of the first transistor Q1. The drain of the second transistor Q2 serves as the power output terminal 33 of the switch circuit 30 and is electrically connected to the positive charging input terminal RX+ of the receiver 13. The gate of the third transistor Q3 is electrically connected to the controller 40 via the second resistor R2. The drain of the third transistor Q3 is electrically connected to the gate of the first transistor Q1. The source of the third transistor Q3 is grounded. The third resistor R3 is connected between the gate of the third transistor Q3 and ground. In this embodiment, the first transistor Q1 and the second transistor Q2 are enhancement mode P-channel metal oxide field effect transistors, and the third transistor Q3 is an enhancement mode N-channel metal oxide field effect transistor. The drain of the first transistor Q1 serves as the power input terminal 32 of the switch circuit 30, the drain of the second transistor Q2 serves as the power output terminal 33, and the end of the second resistor R2 away from the gate of the third transistor Q3 serves as the control terminal 31. When the control signal sent by the controller 40 to the control terminal 31 is at a high level, the third transistor Q3 is turned on, and the first transistor Q1 and the second transistor Q2 are turned on. The switch circuit 30 can be considered to be operating in the on state. At this time, the power supply chip 20 supplies power to the receiver 13 through the first power output terminal 23, and the receiver 13 begins to charge. When the control signal is at a low level, the third transistor Q3 is turned off, and the first transistor Q1 and the second transistor Q2 are turned off. The switch circuit 30 operates in the off state, and the power output terminal 33 of the switch circuit 30 has no power output, and the receiver 13 does not charge. It should be noted that because the parasitic body diodes in the first transistor Q1 and the second transistor Q2 are reversely connected, current can be prevented from flowing through the body diodes of the first transistor Q1 and the second transistor Q2, which would affect the normal operation of the circuit.

[0034] In some embodiments, the charging compartment control circuit 100 further includes a feedback resistor R4, one end of which is grounded, and the other end of which is electrically connected to the negative electrode RX- of the charging input terminal of the receiver 13 and the IDET pin of the controller 40. When the receiver 13 is connected to the power output terminal 33 and begins charging, the charging current will generate a feedback signal on the feedback resistor R4. After receiving the feedback signal through the IDET pin, the controller 40 can control the output parameters of the power supply chip 20 according to the magnitude of the feedback signal, thereby adjusting the charging current of the receiver 13 to achieve constant current charging of the receiver 13.

[0035] In some embodiments, the charging compartment control circuit 100 further includes an input terminal 70 for connecting to an external power adapter. The input terminal 70 can be an input terminal 70 that complies with various interface standards, such as a USB Type A or Type C interface terminal.

[0036] See also Figure 3 In some embodiments, the charging compartment control circuit 100 further includes a first inductor L, a first capacitor C1, a second capacitor C2, and a third capacitor C3. The first inductor L and the first capacitor C1 are connected in series between the power supply chip 20 and ground, and the second capacitor C2 and the third capacitor C3 are connected in parallel between the first power output terminal 23 of the power supply chip 20 and ground. The power supply chip 20, the first inductor L, the first capacitor C1, the second capacitor C2, and the third capacitor C3 form a boost circuit to complete voltage conversion, converting the external input power voltage into the DC voltage required for charging.

[0037] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, or can be electrical, mechanical or other forms of connection.

[0038] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0039] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0040] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A charging compartment control circuit for charging a wireless sound pickup device, wherein the wireless sound pickup device comprises a first transmitter, a second transmitter, and a receiver, characterized in that: The circuit comprises: a power supply chip, comprising a first charging output terminal, a second charging output terminal, and a first power output terminal, wherein the first charging output terminal is electrically connected to the first transmitter, and the second charging output terminal is electrically connected to the second transmitter; a switch circuit, comprising a power supply input terminal, a power supply output terminal, and a control terminal, wherein the power supply input terminal is electrically connected to the first power supply output terminal of the power supply chip, and the power supply output terminal is electrically connected to the receiver; a controller, electrically connected to the control end of the switch circuit and communicatively connected to the power supply chip; The switch circuit switches between on and off states according to a control signal sent by the controller.

2. The charging compartment control circuit according to claim 1, characterized in that: Also includes rechargeable batteries.

3. The charging compartment control circuit according to claim 2, characterized in that: It also includes an access detection circuit, which is electrically connected to the power supply output end of the switch circuit, the rechargeable battery and the controller.

4. The charging compartment control circuit according to claim 3, characterized in that: The access detection circuit includes a sixth resistor, a first diode and a fifth resistor connected in series in sequence, wherein the positive electrode of the first diode is electrically connected to the rechargeable battery through the sixth resistor, the negative electrode of the first diode is electrically connected to the controller through the fifth resistor, and the negative electrode of the first diode is also electrically connected to the power supply output end of the switching circuit.

5. The charging compartment control circuit according to claim 4, characterized in that: The switching circuit includes a first transistor, a second transistor, a third transistor, a first resistor, a second resistor and a third resistor, wherein the drain of the first transistor serves as a power supply input end of the switching circuit and is electrically connected to the first power supply output end of the power supply chip, the source of the first transistor is electrically connected to the source of the second transistor, the gate of the first transistor is connected to the gate of the second transistor, the first resistor is connected between the source and the gate of the first transistor, the drain of the second transistor serves as the power supply output end of the switching circuit and is electrically connected to the receiver, the gate of the third transistor is electrically connected to the controller via the second resistor, the drain of the third transistor is electrically connected to the gate of the first transistor, the source of the third transistor is grounded, and the third resistor is connected between the gate of the third transistor and the ground.

6. The charging compartment control circuit according to claim 5, characterized in that: The charging compartment control circuit also includes a feedback resistor, one end of which is grounded, and the other end of which is electrically connected to the negative pole of the charging input end of the receiver and the controller.

7. The charging compartment control circuit according to claim 1, characterized in that: It also includes an input terminal for connecting to an external power adapter.

8. The charging compartment control circuit according to any one of claims 1 to 7, characterized in that: It also includes a first inductor, a first capacitor, a second capacitor and a third capacitor, wherein the first inductor and the first capacitor are connected in series between the power supply chip and the ground, and the second capacitor and the third capacitor are connected in parallel between the first power output terminal of the power supply chip and the ground.

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