Audio power amplifier adjusting circuit and sound box

Abstract

The invention relates to the technical field of audio control, in particular to an audio power amplifier adjusting circuit and a loudspeaker box, and the audio power amplifier adjusting circuit comprises a controller, a battery module, a voltage conversion module and a power amplifier module, the controller outputs a first step-down control signal to the voltage conversion module, so that the voltage conversion module can provide a step-down power supply signal to the power amplifier module, and the power consumption of the power amplifier module is reduced; moreover, the controller outputs the audio control signal for reducing the power amplifier to the control signal input end of the power amplifier module, so that the power of the audio signal output by the power amplifier module is reduced, the loss of electric quantity is reduced, the endurance time of the sound box is prolonged under the condition that the manufacturing cost is not increased, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of audio control, and particularly to an audio power amplifier adjustment circuit and a speaker. Background Art

[0002] When the battery-powered Bluetooth speaker has a low battery level, the working current is relatively large. When the user turns up the volume and the battery runs out of power and cannot supply power, the Bluetooth speaker will automatically power off and stop playing. Its battery life is relatively short, resulting in a poor user experience. And the user can only increase the battery life by increasing the battery capacity. However, as the battery capacity increases, the manufacturing cost of the Bluetooth speaker will also increase accordingly. Summary of the Invention

[0003] Embodiments of the present invention provide an audio power amplifier adjustment circuit and a speaker to solve the problems of short battery life, poor user experience, and inability to balance battery life and manufacturing cost in the prior art.

[0004] In a first aspect, the present invention provides an audio power amplifier adjustment circuit, including: a controller, a battery module, a voltage conversion module, and a power amplifier module; wherein,

[0005] The first detection end of the controller is connected to the first detection signal output end of the battery module, the first control signal output end of the controller is connected to the control signal input end of the voltage conversion module, the audio signal output end of the controller is connected to the audio signal input end of the power amplifier module, the second control signal output end of the controller is connected to the control signal input end of the power amplifier module, the power signal output end of the battery module is connected to the power signal input end of the voltage conversion module, the power signal output end of the voltage conversion module is connected to the power signal input end of the power amplifier module, and the audio signal output end of the power amplifier module is used to output an audio signal;

[0006] The first detection end of the controller is used to obtain the power signal of the battery module. When the controller determines that the power signal of the battery module is lower than a preset voltage threshold, the controller outputs a first step-down control signal from the first control signal output end to the control signal input end of the voltage conversion module, so that the voltage conversion module provides a step-down power supply signal to the power amplifier module;

[0007] And, a reduced audio control signal for the power amplifier is output from the second control signal output end to the control signal input end of the power amplifier module.

[0008] In an embodiment, the voltage conversion module includes: a pulse width modulation circuit and a boost circuit;

[0009] The power supply terminal of the pulse width modulation circuit is connected to the power signal output terminal of the battery module. The enable signal input terminal of the pulse width modulation circuit is connected to the enable signal output terminal of the controller. The first signal input terminal of the pulse width modulation circuit is connected to the first control signal output terminal of the controller. The control signal output terminal of the pulse width modulation circuit is connected to the control signal input terminal of the boost circuit. The power signal input terminal of the boost circuit is connected to the power signal output terminal of the battery module. The power signal output terminal of the boost circuit is connected to the power signal input terminal of the power amplifier module. The detection signal output terminal of the boost circuit is connected to the detection signal input terminal of the pulse width modulation circuit;

[0010] The enable signal input terminal of the pulse width modulation circuit is used to receive an enable control signal from the enable signal output terminal of the controller. The pulse width modulation circuit is used to receive the first buck control signal from the first signal input terminal. The pulse width modulation circuit is used to output a pulse width modulation signal from the control signal output terminal. The pulse width modulation circuit is used to control the boost circuit to provide the buck power supply signal from the power signal output terminal of the boost circuit to the power amplifier module.

[0011] In one embodiment, the pulse width modulation circuit includes: a boost switch adjustment circuit, a modulation chip, a first power supply circuit, and a detection and feedback circuit;

[0012] The input terminal of the boost switch adjustment circuit is connected to the first control signal output terminal of the controller. The output terminal of the boost switch adjustment circuit is connected to the control signal input terminal of the modulation chip. The detection signal input terminal of the modulation chip is connected to the detection signal output terminal of the boost circuit through the detection and feedback circuit. The control signal output terminal of the modulation chip is connected to the control signal input terminal of the boost circuit. The power supply terminal of the modulation chip is connected to the power signal output terminal of the battery module through the first power supply circuit. The enable signal input terminal of the modulation chip is connected to the enable signal output terminal of the controller.

[0013] In one embodiment, the boost circuit includes: a first filter module, a dynamic boost chip, and a rectification circuit;

[0014] The input end of the first filtering module is connected to the power signal output end of the battery module, the output end of the first filtering module is connected to the input end of the rectifying circuit, the output end of the rectifying circuit is connected to the power signal input end of the power amplifier module, the control signal input end of the dynamic boost chip is connected to the control signal output end of the pulse width modulation circuit, the detection signal output end of the dynamic boost chip is connected to the detection signal input end of the pulse width modulation circuit, and the adjustment signal output end of the dynamic boost chip is connected to the adjustment signal input end of the dynamic boost chip.

[0015] In one embodiment, the audio power amplifier adjustment circuit further includes: a voltage and current detection and feedback module;

[0016] The detection signal input end of the voltage and current detection and feedback module is connected to the power signal output end of the voltage conversion module, and the detection signal output end of the voltage and current detection and feedback module is connected to the voltage and current detection signal input end of the voltage conversion module;

[0017] The voltage conversion module controls the magnitude of the power signal output from its power signal output end according to the voltage value and current value output from the detection signal output end of the voltage and current detection and feedback module.

[0018] In one embodiment, the voltage and current detection and feedback module includes: a first sampling resistor, a second sampling resistor, and a third sampling resistor;

[0019] The first end of the first sampling resistor is connected to the power signal output end of the voltage conversion module, the second end of the first sampling resistor is connected to the first end of the second sampling resistor, the second end of the second sampling resistor is connected to the first end of the third sampling resistor, the second end of the second sampling resistor is connected to the voltage and current detection signal input end of the voltage conversion module, and the second end of the third sampling resistor is grounded.

[0020] In one embodiment, the audio power amplifier adjustment circuit further includes: an audio dynamic monitoring and feedback module;

[0021] The input end of the audio dynamic monitoring and feedback module is connected to the audio detection signal output end of the power amplifier module, and the output end of the audio dynamic monitoring and feedback module is connected to the audio detection signal input end of the voltage conversion module;

[0022] The audio dynamic monitoring and feedback module is configured to output the audio feedback signal from the output end of the audio dynamic monitoring and feedback module according to the audio detection signal.

[0023] The voltage conversion module is configured to control the magnitude of the power signal output from the power signal output terminal according to the audio feedback signal when it is determined that the power signal of the battery module is not lower than a preset voltage threshold.

[0024] In one embodiment, the audio power amplifier adjustment circuit further includes: a battery management module;

[0025] The power voltage input terminal of the battery management module is used to receive a power voltage, the power voltage output terminal of the battery management module is connected to the power voltage input terminal of the battery module, and the monitoring terminal of the battery management module is connected to the second detection signal output terminal of the battery module;

[0026] The monitoring terminal of the battery management module is configured to obtain the power of the battery module through the second detection signal output terminal of the battery module, and the battery management module is configured to output a power voltage signal to the power voltage input terminal of the battery module through the power voltage output terminal of the battery management module according to the power of the battery module.

[0027] In one embodiment, the audio power amplifier adjustment circuit further includes: a protection module;

[0028] The power voltage input terminal of the battery management module receives the power voltage through the protection module.

[0029] In a second aspect, the present invention provides a speaker, including: a chassis, a speaker is provided on the chassis, and the audio power amplifier adjustment circuit as described in any one of the above is built in the chassis;

[0030] The audio signal output terminal of the audio power amplifier adjustment circuit is connected to the input terminal of the speaker.

[0031] The beneficial effects of the embodiments of the present invention compared with the prior art are as follows:

[0032] The audio power amplifier adjustment circuit of the present invention includes: a controller, a battery module, a voltage conversion module, and a power amplifier module. When the power signal of the battery module is lower than a preset voltage threshold, the controller outputs a first step-down control signal to the voltage conversion module, so that the voltage conversion module can provide a step-down power supply signal to the power amplifier module, reducing the power consumption of the power amplifier module; and, the controller outputs an audio control signal for reducing the power amplifier to the control signal input terminal of the power amplifier module to reduce the power of the audio signal output by the power amplifier module, reducing the power consumption, increasing the battery life of the speaker without increasing the manufacturing cost, and improving the user experience. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the accompanying drawings required for the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0034] Figure 1 is a schematic diagram of an audio power amplifier adjustment circuit provided by an embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of an audio power amplifier adjustment circuit provided by another embodiment of the present invention;

[0036] Figure 3 is a circuit diagram of a pulse width modulation circuit in the audio power amplifier adjustment circuit provided by an embodiment of the present invention;

[0037] Figure 4 is a circuit diagram of a boost circuit in the audio power amplifier adjustment circuit provided by another embodiment of the present invention;

[0038] Figures 5 to 9 is a schematic diagram of five other audio power amplifier adjustment circuits provided by the embodiments of the present invention;

[0039] Figure 10 is a circuit diagram of a protection module in the audio power amplifier adjustment circuit provided by an embodiment of the present invention;

[0040] Figure 11 is a schematic diagram of an audio power amplifier adjustment circuit provided by another embodiment of the present invention;

[0041] Among them, 01, controller; 02, battery module; 03, voltage conversion module; 04, power amplifier module; 05, voltage and current detection and feedback module; 06, audio dynamic monitoring and feedback module; 07, battery management module; 08, protection module; 11, pulse width modulation circuit; 12, boost circuit; 21, boost switch adjustment circuit; 22, first power supply circuit; 23, detection and feedback circuit; 31, first filter module; 32, rectifier circuit; 41, wireless receiver; 42, key control module; 43, LED (Light-Emitting Diode) display module. Detailed implementation manners

[0042] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the following further details the present invention in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0045] To fully understand the present invention, detailed structures and steps will be presented in the following description to explain the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail as follows. However, in addition to these detailed descriptions, the present invention may also have other embodiments.

[0046] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the disclosure belongs. It will be further understood that the terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0047] In one embodiment, a schematic diagram of an audio power amplifier adjustment circuit is provided, as Figure 1 shown, including: a controller 01, a battery module 02, a voltage conversion module 03 and a power amplifier module 04; wherein:

[0048] The first detection terminal of the controller 01 is connected to the first detection signal output terminal of the battery module 02. The first control signal output terminal of the controller 01 is connected to the control signal input terminal of the voltage conversion module 03. The audio signal output terminal of the controller 01 is connected to the audio signal input terminal of the power amplifier module 04. The second control signal output terminal of the controller 01 is connected to the control signal input terminal of the power amplifier module 04. The power signal output terminal of the battery module 02 is connected to the power signal input terminal of the voltage conversion module 03. The power signal output terminal of the voltage conversion module 03 is connected to the power signal input terminal of the power amplifier module 04. The audio signal output terminal of the power amplifier module 04 is used to output an audio signal;

[0049] The first detection terminal of the controller 01 is used to obtain the power signal of the battery module 02. When the controller 01 determines that the power signal of the battery module 02 is lower than the preset voltage threshold, the controller 01 outputs a first step-down control signal from its first control signal output terminal to the control signal input terminal of the voltage conversion module 03, so that the voltage conversion module 03 provides a step-down power supply signal to the power amplifier module 04;

[0050] Moreover, a reduced audio control signal for the power amplifier is output from the second control signal output terminal to the control signal input terminal of the power amplifier module 04.

[0051] In practical applications, this audio power amplifier adjustment circuit can be applied to a Bluetooth speaker or various battery-powered audio products. There is no specific limitation here, and it depends on its specific application environment, all of which are within the scope of protection of this application.

[0052] The working process of the above audio power amplifier adjustment circuit is as follows: When the audio power amplifier adjustment circuit is working, the controller 01 outputs an audio signal to the power amplifier module 04 and simultaneously outputs an audio control signal to the power amplifier module 04. At this time, the voltage conversion module 03 outputs a power signal that can minimally ensure the operation of the power amplifier module 04 to ensure that the power amplifier module 04 can normally work and output an audio signal. At the same time, the controller 01 obtains the power signal of the battery module 02 and determines whether the power signal of the battery module 02 is lower than the preset voltage threshold. When the power signal of the battery module 02 is lower than the preset voltage threshold, the controller 01 outputs a first step-down control signal to the voltage conversion module 03, so that the voltage conversion module 03 provides a step-down power supply signal to the power amplifier module 04, and moreover, outputs a reduced audio control signal for the power amplifier to the power amplifier module 04 to reduce the power amplification of the power amplifier module 04.

[0053] The audio power amplifier adjustment circuit of this embodiment includes: a controller 01, a battery module 02, a voltage conversion module 03, and a power amplifier module 04. When the power signal of the battery module 02 is lower than a preset voltage threshold, the controller 01 outputs a first buck control signal to the voltage conversion module 03, so that the voltage conversion module 03 can provide a buck power supply signal to the power amplifier module 04, reducing the power consumption of the power amplifier module 04. Moreover, the controller 01 outputs an audio control signal for reducing the power amplifier to the control signal input end of the power amplifier module 04 to reduce the power of the audio signal output by the power amplifier module 04, reducing the power loss, increasing the battery life of the speaker without increasing the manufacturing cost, improving the user experience, avoiding the phenomenon of the battery being pulled dead under large current, improving the efficiency of the voltage conversion module 03 and the power amplifier module 04, and extending the service life of the battery.

[0054] In one embodiment, as Figure 2 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. Based on the schematic diagram of the audio power amplifier adjustment circuit shown above Figure 1 the voltage conversion module 03 includes: a pulse width modulation circuit 11 and a boost circuit 12; where:

[0055] The power supply terminal of the pulse width modulation circuit 11 is connected to the power signal output terminal of the battery module 02, the enable signal input terminal of the pulse width modulation circuit 11 is connected to the enable signal output terminal of the controller 01, the first signal input terminal of the pulse width modulation circuit 11 is connected to the first control signal output terminal of the controller 01, the control signal output terminal of the pulse width modulation circuit 11 is connected to the control signal input terminal of the boost circuit 12, the power signal input terminal of the boost circuit 12 is connected to the power signal output terminal of the battery module 02, the power signal output terminal of the boost circuit 12 is connected to the power signal input terminal of the power amplifier module 04, and the detection signal output terminal of the boost circuit 12 is connected to the detection signal input terminal of the pulse width modulation circuit 11;

[0056] The enable signal input terminal of the pulse width modulation circuit 11 is used to receive an enable control signal from the enable signal output terminal of the controller 01. The pulse width modulation circuit 11 is used to receive a first buck control signal from the first signal input terminal, the pulse width modulation circuit 11 is used to output a pulse width modulation signal from the control signal output terminal, and the pulse width modulation circuit 11 is used to control the boost circuit 12 to provide a buck power supply signal to the power amplifier module 04 from the power signal output terminal of the boost circuit 12.

[0057] The working process of the above audio power amplifier adjustment circuit is as follows: when the power signal of the battery module 02 is lower than the preset voltage threshold, the pulse width modulation circuit 11 receives the enable control signal and the first buck control signal. The pulse width modulation circuit 11 adjusts the upper limit value and the lower limit value of the boost circuit 12 according to the first buck control signal, so as to output a corresponding pulse width modulation signal to the boost circuit 12, and control the boost circuit 12 to provide a corresponding buck power supply signal to the power amplifier module 04.

[0058] In the audio power amplifier adjustment circuit of this embodiment, by adopting the pulse width modulation circuit 11 and the boost circuit 12 to form the voltage conversion module 03, when the power signal of the battery module 02 is lower than the preset voltage threshold, the pulse width modulation circuit 11 can control the boost circuit 12, so as to provide a corresponding buck power supply signal to the power amplifier module 04 through the boost circuit 12, reduce the power consumption of the power amplifier module 04, increase the battery life of the speaker without increasing the manufacturing cost, avoid the battery module 02 running out of power and causing the battery to shut down, and further improve the user experience.

[0059] In one embodiment, as Figure 3 shown, a circuit diagram of the first sensor in the audio power amplifier adjustment circuit 1 is provided. Based on the schematic diagram of the audio power amplifier adjustment circuit 1 shown above Figure 2 shown, the pulse width modulation circuit 11 includes: a boost switch adjustment circuit 21, a modulation chip U108, a first power supply circuit 22, and a detection feedback circuit 23; where:

[0060] The input end of the boost switch adjustment circuit 21 is connected to the first control signal output end of the controller 01, the output end of the boost switch adjustment circuit 21 is connected to the control signal input end of the modulation chip U108, the detection signal input end of the modulation chip U108 is connected to the detection signal output end of the boost circuit 12 through the detection feedback circuit 23, the control signal output end of the modulation chip U108 is connected to the control signal input end of the boost circuit 12, the power supply end of the modulation chip U108 is connected to the power signal output end of the battery module 02 through the first power supply circuit 22, and the enable signal input end of the modulation chip U108 is connected to the enable signal output end of the controller 01.

[0061] In practical applications, as Figure 3 shown, the boost switch adjustment circuit 21 can be jointly composed of a switch tube Q1, resistors R7, R5, and R6 to achieve the corresponding functions; and its first power supply circuit 22 can also be as Figure 3 shown, jointly composed of a resistor FB107, capacitors C274 and C240 to achieve the corresponding functions, and its detection feedback circuit 23 can also be as Figure 3As shown, it is jointly composed of resistors R228, R227, R233, R135 and capacitors C237, C235, C238 to achieve the corresponding detection and feedback functions; at the same time, as Figure 3 shown, the second filtering module 25 can also be used to filter the signals of each pin of the input modulation chip U108 to avoid interference of clutter on the signals of each pin of the input modulation chip U108, improving the security and reliability of the signals of each pin of the input modulation chip U108. Specifically, the second filtering module 25 can be composed of a polarized capacitor EC102, capacitors C225, C241, C228, C127, C239, C285, C233, C236 and a buffer resistor R229; at the same time, its pulse width modulation circuit 11 can also be as Figure 3 shown and further includes a conduction module 24, so that the modulation chip U108 can control the boost circuit 12 through the conduction module 24 to achieve fast conduction, improving the efficiency of the pulse width modulation circuit 11. Specifically, the conduction module 24 can be as Figure 3 shown, and is composed of resistors R124, R113 and a diode D104. In practical applications, it is not limited to this, and it can be determined according to its specific application environment, and all are within the protection scope of this application.

[0062] The working process of the above audio power amplifier adjustment circuit is as follows: when the power signal of the battery module 02 is lower than the preset voltage threshold, the modulation chip U108 receives the first buck control signal through the boost switch adjustment circuit 21, and receives the power signal output by the battery module 02 through the first power supply circuit 22. At the same time, after the modulation chip U108 receives the enable control signal output by the controller 01, the modulation chip U108 outputs a corresponding pulse width modulation signal to the boost circuit 12 according to the first buck control signal to control the boost circuit 12 to provide a buck power supply signal to the power amplifier module 04. At the same time, the modulation chip U108 receives the feedback current output by the boost circuit 12 through the detection and feedback circuit 23 to judge whether the boost circuit 12 fails according to the feedback current. When the feedback current is less than the preset value, the boost circuit 12 fails. At this time, the modulation chip U108 stops outputting the pulse width modulation signal to the boost circuit 12 to prevent damage to the boost circuit 12; when the feedback current is not less than the preset value, the boost circuit 12 does not fail, and the modulation chip U108 continues to output the pulse width modulation signal to the boost circuit 12.

[0063] The audio power amplifier adjustment circuit of this embodiment forms a pulse width modulation circuit 11 by adopting a boost switch adjustment circuit 21, a modulation chip U108, a first power supply circuit 22, and a detection feedback circuit 23. When the power signal of the battery module 02 is lower than a preset voltage threshold, the modulation chip U108 can output a corresponding pulse width modulation signal to the boost circuit 12 according to the first buck control signal, so that the boost circuit 12 can provide a corresponding buck power supply signal to the power amplifier module 04, reducing the power consumption of the power amplifier module 04, increasing the battery life of the speaker without increasing the manufacturing cost, and improving the user experience.

[0064] In one embodiment, as Figure 4 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. Based on the schematic diagram of the audio power amplifier adjustment circuit shown above Figure 2 the boost circuit 12 includes: a first filtering module 31, a dynamic boost chip Q107, and a rectifying circuit 32; where:

[0065] The input end of the first filtering module 31 is connected to the power signal output end of the battery module 02, the output end of the first filtering module 31 is connected to the input end of the rectifying circuit 32, the output end of the rectifying circuit 32 is connected to the power signal input end of the power amplifier module 04, the control signal input end of the dynamic boost chip Q107 is connected to the control signal output end of the pulse width modulation circuit 11, the detection signal output end of the dynamic boost chip Q107 is connected to the detection signal input end of the pulse width modulation circuit 11, and the adjustment signal output end of the dynamic boost chip Q107 is connected to the adjustment signal input end of the dynamic boost chip Q107.

[0066] In practical applications, as Figure 4 shown, the first filtering module 31 can be composed of a filtering inductor L103 to achieve the corresponding filtering function; and the rectifying circuit 32 can also be as Figure 4 shown, composed of a rectifying diode D107, a resistor R225, and a capacitor C227 to achieve the corresponding rectifying function; at the same time, as Figure 4 shown, a third filtering module 33 can also be used to filter the power signal output from the output end of the rectifying circuit 32 to avoid interference of the power signal by clutter, improving the safety and reliability of the power signal input to the power signal input end of the power amplifier module 04. Specifically, the third filtering module 33 can be composed of a polarized capacitor EC101, capacitors C223, C100, C224, and C275. In practical applications, it is not limited to this, and depending on its specific application environment, it is within the protection scope of this application.

[0067] The working process of the schematic diagram of the above audio power amplifier adjustment circuit 1 is as follows: The rectification circuit 32 receives the power signal output by the battery module 02 through the first filtering module 31. When the power signal of the battery module 02 is lower than the preset voltage threshold, the adjustment signal output by the dynamic boost chip Q107 is sent to the rectification circuit 32. The rectification circuit 32 rectifies the power signal according to the adjustment signal and then outputs the corresponding stepped-down power supply signal to the power amplifier module 04.

[0068] In the audio power amplifier adjustment circuit of this embodiment, a boost circuit 12 is formed by adopting the first filtering module 31, the dynamic boost chip Q107 and the rectification circuit 32. The rectification circuit 32 can receive the power signal through the first filtering module 31. When the power signal of the battery module 02 is lower than the preset voltage threshold, the rectification circuit 32 rectifies the power signal according to the adjustment signal and then outputs the corresponding stepped-down power supply signal to the power amplifier module 04, reducing the power consumption of the power amplifier module 04, increasing the battery life of the speaker without increasing the manufacturing cost, and improving the user experience.

[0069] In one embodiment, as Figure 5 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. On the basis of the schematic diagram of the audio power amplifier adjustment circuit shown above Figure 1 the audio power amplifier adjustment circuit further includes: a voltage and current detection feedback module 05; where:

[0070] The detection signal input end of the voltage and current detection feedback module 05 is connected to the power signal output end of the voltage conversion module 03, and the detection signal output end of the voltage and current detection feedback module 05 is connected to the voltage and current detection signal input end of the voltage conversion module 03;

[0071] The voltage conversion module 03 controls the magnitude of the power signal output by its power signal output end according to the voltage value and current value output by the detection signal output end of the voltage and current detection feedback module 05.

[0072] The working process of the above audio power amplifier adjustment circuit is as follows: When the voltage conversion module 03 is working, the voltage and current detection feedback module 05 collects the power signal output by the voltage conversion module 03, and feeds back the voltage value and current value of the power signal to the voltage conversion module 03, so that the voltage conversion module 03 can control the magnitude of the power signal it outputs according to the voltage value and current value collected by the voltage and current detection feedback module 05.

[0073] The audio power amplifier adjustment circuit of this embodiment uses the voltage and current detection feedback module 05 to collect the power supply signal output by the voltage conversion module 03, and feeds back the voltage value and current value of the power supply signal to the voltage conversion module 03, so that the voltage conversion module 03 can control the magnitude of the power supply signal it outputs according to the voltage value and current value collected by the voltage and current detection feedback module 05, forming a closed-loop control.

[0074] In one embodiment, as Figure 6 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. Based on the schematic diagram of the audio power amplifier adjustment circuit shown above Figure 5 the voltage and current detection feedback module 05 includes: a first acquisition resistor R111, a second acquisition resistor R123, and a third acquisition resistor R230; where:

[0075] The first end of the first acquisition resistor R111 is connected to the power supply signal output end of the voltage conversion module 03, the second end of the first acquisition resistor R111 is connected to the first end of the second acquisition resistor R123, the second end of the second acquisition resistor R123 is connected to the first end of the third acquisition resistor R230, the second end of the second acquisition resistor R123 is connected to the voltage and current detection signal input end of the voltage conversion module 03, and the second end of the third acquisition resistor R230 is grounded.

[0076] The working process of the above audio power amplifier adjustment circuit is as follows: when the voltage conversion module 03 is working, the voltage and current detection signal input end of the voltage conversion module 03 collects the power supply signal output by the voltage conversion module 03 through the first acquisition resistor R111, the second acquisition resistor R123, and the third acquisition resistor R230, so that the voltage conversion module 03 can control the magnitude of the power supply signal output by its power supply signal output end according to the voltage value and current value collected by the voltage and current detection feedback module 05.

[0077] The audio power amplifier adjustment circuit of this embodiment uses the first acquisition resistor R111, the second acquisition resistor R123, and the third acquisition resistor R230 to form the voltage and current detection feedback module 05, so that the voltage and current detection feedback module 05 can collect the power supply signal output by the voltage conversion module 03, and feed back the voltage value and current value of the power supply signal to the voltage conversion module 03, so that the voltage conversion module 03 can control the magnitude of the power supply signal it outputs according to the voltage value and current value collected by the voltage and current detection feedback module 05, forming a closed-loop control.

[0078] In one embodiment, as Figure 7 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. Based on the schematic diagram of the audio power amplifier adjustment circuit shown above Figure 1Based on the schematic diagram of the audio power amplifier adjustment circuit shown, the audio power amplifier adjustment circuit further includes: an audio dynamic monitoring and feedback module 06; wherein:

[0079] The input end of the audio dynamic monitoring and feedback module 06 is connected to the audio detection signal output end of the power amplifier module 04, and the output end of the audio dynamic monitoring and feedback module 06 is connected to the audio detection signal input end of the voltage conversion module 03;

[0080] The audio dynamic monitoring and feedback module 06 is configured to output an audio feedback signal from the output end of the audio dynamic monitoring and feedback module 06 based on the audio detection signal,

[0081] The voltage conversion module 03 is configured to control the magnitude of the power signal output from the power signal output end based on the audio feedback signal when it is determined that the power signal of the battery module 02 is not lower than a preset voltage threshold.

[0082] The working process of the above audio power amplifier adjustment circuit is as follows: when the controller 01 determines that the power signal of the battery module 02 is not lower than the preset voltage threshold, the voltage conversion module 03 monitors the audio signal output from the audio detection signal output end of the power amplifier module 04 through the audio dynamic monitoring and feedback module 06, so as to control the magnitude of the power signal output from the power signal output end based on the audio feedback signal output by the audio dynamic monitoring and feedback module 06.

[0083] The audio power amplifier adjustment circuit of this embodiment uses the audio dynamic monitoring and feedback module 06 to monitor the audio signal output from the audio detection signal output end of the power amplifier module 04, so that the voltage conversion module 03 can control the magnitude of the power signal output from the power signal output end based on the audio feedback signal output by the audio dynamic monitoring and feedback module 06, avoiding waste of the power signal output by the voltage conversion module 03, increasing the battery life of the speaker without increasing the manufacturing cost, and improving the user experience.

[0084] In one embodiment, as Figure 8 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. Based on the schematic diagram of the audio power amplifier adjustment circuit shown above, the audio power amplifier adjustment circuit further includes: a battery management module 07; wherein: Figure 1 The power voltage input end of the battery management module 07 is used to receive the power voltage, the power voltage output end of the battery management module 07 is connected to the power voltage input end of the battery module 02, and the monitoring end of the battery management module 07 is connected to the second detection signal output end of the battery module 02;

[0085] The power voltage input end of the battery management module 07 is used to receive the power voltage, the power voltage output end of the battery management module 07 is connected to the power voltage input end of the battery module 02, and the monitoring end of the battery management module 07 is connected to the second detection signal output end of the battery module 02;

[0086] The monitoring terminal of the battery management module 07 is used to obtain the power of the battery module 02 through the second detection signal output terminal of the battery module 02. The battery management module 07 is used to output a power supply voltage signal to the power supply voltage input terminal of the battery module 02 through the power supply voltage output terminal of the battery management module 07 according to the power of the battery module 02.

[0087] The working process of the above audio power amplifier adjustment circuit is as follows: when the battery management module 07 detects that the power of the battery module 02 is lower than the preset value, the battery management module 07 receives the power supply voltage and outputs a power supply voltage signal to the battery module 02 through the power supply voltage output terminal of the battery management module 07 to charge the battery module 02.

[0088] In the audio power amplifier adjustment circuit of this embodiment, the battery management module 07 is used to monitor the power of the battery module 02, and when the power of the battery module 02 is lower than the preset value, a power supply voltage is output to the battery module 02 to charge the battery module 02, avoiding the speaker from powering off and stopping due to too low battery power and affecting the user experience.

[0089] In one embodiment, as Figure 9 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided. On the basis of the schematic diagram of the audio power amplifier adjustment circuit shown above, the audio power amplifier adjustment circuit further includes: a protection module 08; wherein, the power supply voltage input terminal of the battery management module 07 receives the power supply voltage through the protection module 08. Figure 8 In practical applications, the protection module 08 can be as

[0090] shown, and is composed of an OVP (Over Voltage Protection) / OCP (Over Current Protection) chip, capacitors C16, C123, C7, C135, C134 and resistors R22, R24, and zener diode D24 to implement the corresponding over-current and over-voltage protection functions, thereby avoiding damage to the audio power amplifier adjustment circuit during over-current and over-voltage, and improving the safety and reliability of the audio power amplifier adjustment circuit. This is not limited in practical applications and can be determined according to its specific application environment, and all are within the protection scope of this application. Figure 10 The working process of the above audio power amplifier adjustment circuit is as follows: the battery management module 07 receives the power supply voltage through the protection module 08 to prevent damage to the battery management module 07 caused by too high power supply voltage.

[0091]

[0092] ​In the audio power amplifier adjustment circuit of this embodiment, the protection module 08 is arranged at the power voltage input end of the battery management module 07, so that the battery management module 07 can receive the power voltage through the protection module 08, avoiding damage to the battery management module 07 caused by excessive power voltage and improving the safety and reliability of the audio power amplifier adjustment circuit.

[0093] In one embodiment, a speaker is provided, including: a chassis, a speaker arranged on the chassis, and the audio power amplifier adjustment circuit as described in any of the above embodiments is built in the chassis; wherein, the audio signal output end of the audio power amplifier adjustment circuit is connected to the input end of the speaker.

[0094] The working process of the above speaker is: the audio power amplifier adjustment circuit outputs an audio signal to the speaker for playback through the speaker.

[0095] The speaker of this embodiment increases the battery life of the speaker without increasing the manufacturing cost and improves the user experience by arranging the audio power amplifier adjustment circuit as described in any of the above embodiments in the chassis and connecting the audio signal output end of the audio power amplifier adjustment circuit to the input end of the speaker, so as to output the audio signal to the speaker through the audio power amplifier adjustment circuit.

[0096] In the above Figures 1 to 10 On the basis of the shown audio power amplifier adjustment circuit, as Figure 11 shown, a schematic diagram of an audio power amplifier adjustment circuit is provided, wherein the audio power amplifier adjustment circuit is jointly composed of a controller 01 with Bluetooth decoding function, a battery module 02, a power amplifier module 04, a pulse width modulation circuit 11, a boost circuit 12, a voltage and current detection and feedback module 05, an audio dynamic monitoring and feedback module 06, a battery management module 07, a protection module 08, a wireless receiver 41, a key control module 42, and an LED display module 43.

[0097] Among them, the controller 01 receives the audio Bluetooth signal sent by an external device through the wireless receiver 41, and then decodes the audio Bluetooth signal through the controller 01 and plays it through the power amplifier module 04 and the speaker; its LED display module 43 can display the power of the battery module 02. At the same time, the user can also control each module in the audio power amplifier adjustment circuit through the key control module 42, such as changing the size of the audio signal and controlling the power on and off of the speaker. In practical applications, it is not limited to this, and all are within the protection scope of this application.

[0098] The above-described embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. An audio power amplifier adjustment circuit, characterized in that, Comprising: A controller, a battery module, a voltage conversion module, and a power amplifier module; wherein, The first detection end of the controller is connected to the first detection signal output end of the battery module, the first control signal output end of the controller is connected to the control signal input end of the voltage conversion module, the audio signal output end of the controller is connected to the audio signal input end of the power amplifier module, the second control signal output end of the controller is connected to the control signal input end of the power amplifier module, the power signal output end of the battery module is connected to the power signal input end of the voltage conversion module, the power signal output end of the voltage conversion module is connected to the power signal input end of the power amplifier module, and the audio signal output end of the power amplifier module is used to output an audio signal; The first detection end of the controller is used to obtain the power signal of the battery module. When the controller determines that the power signal of the battery module is lower than a preset voltage threshold, the first control signal output end of the controller outputs a first step-down control signal to the control signal input end of the voltage conversion module, so that the voltage conversion module provides a step-down power supply signal to the power amplifier module; And, a reduced audio control signal for the power amplifier is output from the second control signal output end to the control signal input end of the power amplifier module.

2. The audio power amplifier adjustment circuit according to claim 1, wherein The voltage conversion module includes: a pulse width modulation circuit and a boost circuit; The power supply end of the pulse width modulation circuit is connected to the power signal output end of the battery module, the enable signal input end of the pulse width modulation circuit is connected to the enable signal output end of the controller, the first signal input end of the pulse width modulation circuit is connected to the first control signal output end of the controller, the control signal output end of the pulse width modulation circuit is connected to the control signal input end of the boost circuit, the power signal input end of the boost circuit is connected to the power signal output end of the battery module, the power signal output end of the boost circuit is connected to the power signal input end of the power amplifier module, and the detection signal output end of the boost circuit is connected to the detection signal input end of the pulse width modulation circuit; The enable signal input end of the pulse width modulation circuit is used to receive an enable control signal from the enable signal output end of the controller. The pulse width modulation circuit is used to receive the first step-down control signal from the first signal input end. The pulse width modulation circuit is used to output a pulse width modulation signal from the control signal output end. The pulse width modulation circuit is used to control the boost circuit to provide the step-down power supply signal to the power amplifier module from the power signal output end of the boost circuit.

3. The audio power amplifier adjustment circuit according to claim 2, characterized in that The pulse width modulation circuit includes: a boost switch adjustment circuit, a modulation chip, a first power supply circuit, and a detection feedback circuit; The input end of the boost switch adjustment circuit is connected to the first control signal output end of the controller, the output end of the boost switch adjustment circuit is connected to the control signal input end of the modulation chip, the detection signal input end of the modulation chip is connected to the detection signal output end of the boost circuit through the detection feedback circuit, the control signal output end of the modulation chip is connected to the control signal input end of the boost circuit, the power supply end of the modulation chip is connected to the power signal output end of the battery module through the first power supply circuit, and the enable signal input end of the modulation chip is connected to the enable signal output end of the controller.

4. The audio power amplifier adjustment circuit according to claim 2, characterized in that, The boost circuit includes: a first filter module, a dynamic boost chip, and a rectification circuit; The input end of the first filter module is connected to the power signal output end of the battery module, the output end of the first filter module is connected to the input end of the rectification circuit, the output end of the rectification circuit is connected to the power signal input end of the power amplifier module, the control signal input end of the dynamic boost chip is connected to the control signal output end of the pulse width modulation circuit, the detection signal output end of the dynamic boost chip is connected to the detection signal input end of the pulse width modulation circuit, and the adjustment signal output end of the dynamic boost chip is connected to the dynamic boost chip adjustment signal input end.

5. The audio power amplifier adjustment circuit according to claim 1, characterized in that, The audio power amplifier adjustment circuit further includes: a voltage and current detection feedback module; The detection signal input end of the voltage and current detection feedback module is connected to the power signal output end of the voltage conversion module, and the detection signal output end of the voltage and current detection feedback module is connected to the voltage and current detection signal input end of the voltage conversion module; The voltage conversion module controls the magnitude of the power signal output from its power signal output end according to the voltage value and current value output from the detection signal output end of the voltage and current detection feedback module.

6. The audio power amplifier adjustment circuit according to claim 5, wherein The voltage and current detection feedback module includes: a first acquisition resistor, a second acquisition resistor, and a third acquisition resistor; The first end of the first acquisition resistor is connected to the power signal output end of the voltage conversion module, the second end of the first acquisition resistor is connected to the first end of the second acquisition resistor, the second end of the second acquisition resistor is connected to the first end of the third acquisition resistor, the second end of the second acquisition resistor is connected to the voltage and current detection signal input end of the voltage conversion module, and the second end of the third acquisition resistor is grounded.

7. The audio power amplifier adjustment circuit according to claim 1, wherein The audio power amplifier adjustment circuit further includes: an audio dynamic monitoring feedback module; The input end of the audio dynamic monitoring feedback module is connected to the audio detection signal output end of the power amplifier module, and the output end of the audio dynamic monitoring feedback module is connected to the audio detection signal input end of the voltage conversion module; The audio dynamic monitoring feedback module is configured to output the audio feedback signal from the output end of the audio dynamic monitoring feedback module according to the audio detection signal. The voltage conversion module is configured to control the magnitude of the power signal output from the power signal output end according to the audio feedback signal when it is determined that the power signal of the battery module is not lower than the preset voltage threshold.

8. The audio power amplifier adjustment circuit according to claim 1, wherein The audio power amplifier adjustment circuit further includes: a battery management module; The power voltage input terminal of the battery management module is used to receive the power voltage. The power voltage output terminal of the battery management module is connected to the power voltage input terminal of the battery module. The monitoring terminal of the battery management module is connected to the second detection signal output terminal of the battery module; The monitoring terminal of the battery management module is used to obtain the power of the battery module through the second detection signal output terminal of the battery module. The battery management module is used to output a power voltage signal to the power voltage input terminal of the battery module through the power voltage output terminal of the battery management module according to the power of the battery module.

9. The audio power amplifier adjustment circuit according to claim 8, wherein The audio power amplifier adjustment circuit further includes: a protection module; The power voltage input terminal of the battery management module receives the power voltage through the protection module.

10. A speaker, characterized in that, Including: A chassis, a speaker is provided on the chassis, and the chassis is internally provided with the audio power amplifier adjustment circuit according to any one of claims 1 to 9; The audio signal output terminal of the audio power amplifier adjustment circuit is connected to the input terminal of the speaker.

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