Audio power amplifier system and electronic equipment

Abstract

The utility model relates to the field of power amplifiers, in particular to an audio power amplifier system and electronic equipment. The system comprises a power rail switching module which is electrically connected with a first boosting module and a second boosting module and is used for selecting a first voltage output by the first boosting module or a second voltage output by the second boosting module to be output to a power amplifier module according to a received switching control signal; the first boosting module is used for converting an initial voltage input by a power supply into the first voltage; the second boosting module is used for converting the initial voltage input by the power supply into the second voltage; and the power amplification module is used for carrying out power amplification through the first voltage provided by a first power supply line where the first boosting module is located, or carrying out power amplification through the second voltage provided by a second power supply line where the second boosting module is located.

Description

Technical Field

[0001] The present disclosure relates to the field of power amplifiers, and in particular to an audio power amplifier system and electronic equipment. Background Art

[0002] In the related art, there are two power supply schemes for audio amplifiers. One is to boost the power supply through an external boost circuit on the audio amplifier chip, and the other is to boost the power supply through an external boost circuit outside the audio amplifier chip. However, the former is limited by the area of ​​the audio amplifier chip, and the internal boost circuit module cannot occupy a large space, so that the output power is limited, and the efficiency is low at high output power, and the loss is high. The latter is set outside the audio amplifier chip, and the output power is not limited, but the efficiency is low at medium and low power output. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides an audio power amplifier system and an electronic device, which can solve the above problems.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided an audio power amplifier system, the system comprising:

[0005] A power rail switching module, electrically connected to the first boost module and the second boost module, and configured to select, according to a received switching control signal, to output the first voltage output by the first boost module or the second voltage output by the second boost module to the power amplifier module;

[0006] The first boost module is used to convert the initial voltage of the power input into the first voltage;

[0007] The second boost module is used to convert the initial voltage of the power input into the second voltage;

[0008] The power amplifier module is used to perform power amplification through the first voltage provided by the first power supply circuit where the first boost module is located, or to perform power amplification through the second voltage provided by the second power supply circuit where the second boost module is located.

[0009] In some embodiments, the system further comprises:

[0010] A power supply is electrically connected to the first boost module and the second boost module, and is used to provide the initial voltage to the first boost module and the second boost module.

[0011] In some embodiments, the system further comprises:

[0012] A processing module is connected to the controlled end of the power rail switching module and is used to send the switching control signal to the power rail switching module.

[0013] In some embodiments, the processing module includes an application processor, which is connected to the power amplifier module via a signal transmission line, and the signal transmission line is used to transmit the audio digital signal sent by the application processor to the power amplifier module, so that the power amplifier module performs power amplification based on the audio digital signal.

[0014] In some embodiments, the power rail switching module is disposed on the audio power amplifier chip, the input end of which is respectively connected to the output ends of the first boost module and the second boost module, and the output end of which is connected to the power amplifier module.

[0015] In some embodiments, the power rail switching module is disposed outside the audio power amplifier chip, an input end of the module is connected to an output end of a power supply, and an output end of the module is connected to input ends of the first boost module and the second boost module, respectively.

[0016] In some embodiments, the first boost module is disposed on the audio power amplifier chip, and the second boost module is disposed outside the audio power amplifier chip; or

[0017] The first boost module and the second boost module form a boost circuit module, and the boost circuit module is arranged outside the audio power amplifier chip or inside the audio power amplifier chip.

[0018] In some embodiments, the power rail switching module includes a first switch and a second switch, wherein:

[0019] The first switch is provided on the first power supply line and is used to switch on or off the first power supply line;

[0020] The second switch is arranged on the second power supply line, and is used for switching on or off the second power supply line.

[0021] In some embodiments, the second voltage is greater than the first voltage.

[0022] According to a second aspect of an embodiment of the present disclosure, an electronic device is provided, wherein the electronic device comprises the audio power amplifier system as described in the first aspect.

[0023] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0024] The audio power amplifier system proposed in the present disclosure includes a first boost module and a second boost module. The power rail switching module can select a more suitable boost module according to a received switching control signal, so that the power amplifier module can perform power amplification based on the selected voltage, and has higher efficiency while taking into account the output power of the boost module.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] Figure 1 It is a structural schematic diagram of an audio power amplifier system according to an exemplary embodiment of the present disclosure.

[0028] Figure 2 It is a structural schematic diagram of an audio power amplifier system according to an exemplary embodiment of the present disclosure.

[0029] Figure 3 It is a structural schematic diagram of an audio power amplifier system according to an exemplary embodiment of the present disclosure.

[0030] Figure 4A It is a structural schematic diagram of an audio power amplifier system according to an exemplary embodiment of the present disclosure.

[0031] Figure 4B It is a structural schematic diagram of an audio power amplifier system according to an exemplary embodiment of the present disclosure.

[0032] Figure 5 It is a structural schematic diagram of an audio power amplifier system according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0035] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0036] In order to solve the above technical problems, the present disclosure proposes an audio power amplifier system.

[0037] Figure 1 The present invention is a schematic diagram of the structure of an audio power amplifier system according to an embodiment of the present invention, and the audio power amplifier system can be set on a terminal. The audio power amplifier system can be used to amplify audio digital signals, and the terminal includes but is not limited to mobile phones, tablet computers, wearable devices, sensors, Internet of Things devices, speakers, audio, audio playback accessories and other devices.

[0038] like Figure 1 As shown, the audio power amplifier system includes:

[0039] The power rail switching module 110 is electrically connected to the first boost module 120 and the second boost module 130, and is used to select, according to a received switching control signal, to output the first voltage output by the first boost module 120 or the second voltage output by the second boost module 130 to the power amplifier module 140;

[0040] The first boost module 120 is used to convert the initial voltage of the power input into the first voltage;

[0041] The second boost module 130 is used to convert the initial voltage of the power input into the second voltage;

[0042] The power amplifier module 140 is used to perform power amplification through the first voltage provided by the first power supply line where the first boost module 120 is located, or to perform power amplification through the second voltage provided by the second power supply line where the second boost module 130 is located.

[0043] It should be noted that the power rail switching module 110 is electrically connected to the first boost module 120 and the second boost module 130. In fact, the connection method is not limited to Figure 1 This one is shown. Figure 1 Only one possible embodiment is shown to facilitate understanding.

[0044] In some embodiments, the initial voltage provided by the power supply is relatively small, and the initial voltage can be boosted by the first boost module 120 and the second boost module 130 and then output to the power amplifier module 140 to meet the power amplifier requirement.

[0045] In some embodiments, based on the power rail switching module 110 , only one of the first voltage and the second voltage can be output to the power amplifier module.

[0046] In some embodiments, the first power supply line refers to the line from the power supply, the first boost module 120, the power rail switching module 110 to the power amplifier module 140. Based on the first power supply line, the initial voltage output by the power supply can be converted into a first voltage and output to the power amplifier module 140; the second power supply line refers to the line from the power supply, the second boost module 130, the power rail switching module 110 to the power amplifier module 140. Based on the second power supply line, the initial voltage output by the power supply can be converted into a second voltage and output to the power amplifier module 140.

[0047] In some embodiments, the power rail switching module 110 is used to switch the on state and the off state of the first power supply line and the second power supply line.

[0048] The power rail switching module 110 is electrically connected to the first boost module 120 and the second boost module 130, and the power rail switching module is also on the first power supply line and the second power supply line. Therefore, the power rail switching module can select the first voltage or the second voltage output to the power amplifier module 140 by turning on one of the two power supply lines and disconnecting the other power supply line.

[0049] For example, the power rail switching module may switch on the first power supply line and disconnect the second power supply line, so as to select and output the first voltage output by the first boost module 120 to the power amplifier module 140 .

[0050] Therefore, the power rail switching module only needs to be disposed on the first power supply line and the second power supply line, and the present disclosure does not limit the specific location of the power rail switching module.

[0051] For example, taking the first power supply line as an example, the power rail switching module can be set between the power supply and the first boost module to select whether to provide the initial voltage to the first boost module; it can also be set between the first boost module and the power amplifier module to select whether to output the converted first voltage to the power amplifier module.

[0052] In some embodiments, the power amplifier module is located on the audio power amplifier chip.

[0053] The power amplifier module includes a digital power amplifier (class D).

[0054] The power rail switching module disclosed in the present invention can, under the control of a switching control signal, provide a first voltage to the power amplifier module through a first power supply line where a first boost module is located, or provide a second voltage to the power amplifier module through a second power supply line where a second boost module is located, so that the voltage output to the power amplifier module can be changed according to specific circumstances, thereby using a voltage with higher efficiency that meets the requirements in different application scenarios, thereby achieving beneficial technical effects.

[0055] Figure 2 It is a structural schematic diagram of an audio power amplifier system according to an embodiment of the present disclosure.

[0056] like Figure 2 As shown, the power rail switching module 110 is arranged on the audio power amplifier chip, the input end is respectively connected to the output end of the first boost module 120 and the second boost module 130 , and the output end is connected to the power amplifier module 140 .

[0057] In some embodiments, the system further includes: a power supply 210 electrically connected to the first boost module 120 and the second boost module 130 , and configured to provide the initial voltage to the first boost module 120 and the second boost module 130 .

[0058] The initial voltage provided by the power supply 210 is relatively low and cannot meet the voltage requirement of the power amplifier module. Therefore, the initial voltage may be boosted by the first boost module 120 and the second boost module 130 .

[0059] The built-in power supply in the audio amplifier system can ensure the power supply to the amplifier module and determine the value of the initial voltage to facilitate the conversion of the boost module.

[0060] In some embodiments, the initial voltage may also be provided by other power sources outside the audio power amplifier system.

[0061] In some embodiments, the system further includes: a processing module connected to the controlled end of the power rail switching module 110, and configured to send the switching control signal to the power rail switching module.

[0062] By switching the control signal, the processing module can instruct the power rail switching module 110 to output the first voltage or the second voltage to the power amplifier module 140 .

[0063] In some embodiments, the processing module includes an application processor 220 (Application Processor), which is connected to the power amplifier module 140 via a signal transmission line, and the signal transmission line is used to transmit the audio digital signal sent by the application processor 220 to the power amplifier module 140, so that the power amplifier module 140 performs power amplification based on the audio digital signal.

[0064] The switching control signal and the audio digital signal may both be sent by the audio digital signal processing unit 230 in the application processor 220 .

[0065] If the power rail switching module 110 is disposed on the audio power amplifier chip, the switching control signal can also be sent to the audio power amplifier chip through the transmission line and then forwarded to the power rail switching module 110.

[0066] In some embodiments, the application processor 220 may determine the voltage to be used by the power amplifier module 140 according to the audio digital signal to be amplified, and further determine to select the first voltage or the second voltage to supply power to the power amplifier module 140 .

[0067] For example, the application processor 220 can determine the target power required to amplify the audio digital signal based on the volume value, the amplitude of the audio digital signal, the volume level in the system settings, and the value of the analog gain in the digital-to-analog conversion process, and then select a suitable voltage based on the target power to output to the power amplifier module 140 for amplification.

[0068] In some embodiments, the second voltage is greater than the first voltage.

[0069] like Figure 2 As shown, in some embodiments, the first boost module 120 can be set on the audio power amplifier chip, and the first boost module 120 is an internal boost circuit module of the audio power amplifier chip; the second boost module 130 can be set outside the audio power amplifier chip, and the second boost module 130 is an external boost circuit module.

[0070] The internal boost circuit module is limited by space, and the maximum output power is low. When the power is high and the voltage is high, the energy conversion efficiency is also low. The output power of the external boost circuit module is not limited, and it has good efficiency in the scenario of high power and high voltage output, but the efficiency is poor in the case of medium and low power output.

[0071] In some embodiments, the application processor 220 may further instruct the first boost module whether to perform boost conversion.

[0072] If the first boost module does not perform boost conversion, the voltage output by the first power supply circuit is an initial voltage, which is smaller than the first voltage and smaller than the second voltage.

[0073] Therefore, the application processor 220 can divide the voltage required by the power amplifier module 140 into three levels: high, medium and low.

[0074] The high level corresponds to a second voltage with a larger boost: when it is determined that the audio digital signal needs to be amplified using a high level voltage, the switching control signal can instruct the power rail switching module 110 to switch to the second power supply line output. At this time, the initial voltage provided by the power supply 210 is boosted to the second voltage by the second boost module 130, and then output to the power amplifier module 140 for power amplification.

[0075] The mid-range corresponds to a first voltage with a smaller boost: when it is determined that the audio digital signal needs to be amplified using a mid-range voltage, the switching control signal can instruct the power rail switching module 110 to switch to the first power supply line output. At this time, the initial voltage provided by the power supply 210 is boosted to the first voltage by the first boost module 130, and then output to the power amplifier module 140 for power amplification.

[0076] The low gear corresponds to the initial voltage provided by the power supply 210: when it is determined that the audio digital signal needs to be amplified using a low gear voltage, the switching control signal can instruct the power rail switching module 110 to switch to the first power supply line output, and the application processor 220 instructs the first boost module 110 not to perform boost conversion. In this case, the lowest initial voltage will be output to the power amplifier module 140 through the first power supply line for power amplification.

[0077] It should be noted that the present disclosure does not limit the specific location of the power rail switching module, and several possible embodiments are shown below.

[0078] Figure 3 It is a structural schematic diagram of an audio power amplifier system according to an embodiment of the present disclosure.

[0079] like Figure 3 As shown, in some embodiments, the power rail switching module 110 is disposed outside the audio amplifier chip, the input end is connected to the output end of the power supply, and the output end is connected to the input end of the first boost module 120 and the second boost module 130 respectively.

[0080] In fact, the power rail switching module 110 can be disposed on the audio power amplifier chip, or can be disposed outside the audio power amplifier chip, and the present disclosure has no limitation in this regard.

[0081] The present disclosure also does not limit the positions of the first boost module and the second boost module.

[0082] like Figure 2As shown, in some embodiments, the first boost module 120 is disposed on the audio power amplifier chip, and the second boost module 130 is disposed outside the audio power amplifier chip.

[0083] Figure 4A , 4B It is a structural schematic diagram of an audio power amplifier system according to an embodiment of the present disclosure.

[0084] like Figure 4A As shown, in some embodiments, the first boost module 120 and the second boost module 130 are both disposed outside the audio power amplifier chip.

[0085] The second voltage may be greater than the first voltage. In this case, the second boost module 130 may be a high-voltage boost module, and the first boost module 120 may be a low-voltage boost module.

[0086] like Figure 4B As shown, in some embodiments, the first boost module 120 and the second boost module 130 are both disposed on an audio power amplifier chip.

[0087] In some embodiments, the power rail switching module 110 includes a first switching switch and a second switching switch, wherein the first switching switch is arranged on the first power supply line for connecting or disconnecting the first power supply line; the second switching switch is arranged on the second power supply line for connecting or disconnecting the second power supply line.

[0088] The application processor 220 may send a switching control signal to the first switching module and the second switching module respectively, so as to instruct each switching module to control the conduction and disconnection of the power supply line where it is located.

[0089] In some embodiments, the switch may be a MOS tube.

[0090] Figure 5 It is a structural schematic diagram of an audio power amplifier system according to an embodiment of the present disclosure.

[0091] like Figure 5 As shown, in some embodiments, the first boost module and the second boost module constitute a boost circuit module 510, and the boost circuit module 510 is disposed outside the audio power amplifier chip.

[0092] In some embodiments, the boost circuit module 510 may also be disposed in the audio power amplifier chip.

[0093] In some embodiments, the boost circuit module 510 may further include a power rail switching module 110 .

[0094] In other words, the power rail switching module 110 may also be placed in the boost circuit module 510 .

[0095] There may be many variations in the connection mode and the location of the power rail switching module 110 , the first boost module 120 , and the second boost module 130 . Various similar variations based on the present disclosure should also fall within the protection scope of the present disclosure.

[0096] It should be noted that the above embodiments can be combined arbitrarily without conflict.

[0097] An embodiment of the present disclosure further provides an electronic device, which includes the audio power amplifier system according to any of the above embodiments.

[0098] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0099] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0100] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprises a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0101] The method and device provided in the embodiments of the present disclosure are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method of the present disclosure and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present disclosure, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present disclosure.

Claims

1. An audio power amplifier system, characterized in that: The system comprises: A power rail switching module, electrically connected to the first boost module and the second boost module, and configured to select, according to a received switching control signal, to output the first voltage output by the first boost module or the second voltage output by the second boost module to the power amplifier module; The first boost module is used to convert the initial voltage of the power input into the first voltage; The second boost module is used to convert the initial voltage of the power supply input into the second voltage; The power amplifier module is used to perform power amplification through the first voltage provided by the first power supply circuit where the first boost module is located, or to perform power amplification through the second voltage provided by the second power supply circuit where the second boost module is located.

2. The system according to claim 1, characterized in that The system further comprises: A power supply is electrically connected to the first boost module and the second boost module, and is used to provide the initial voltage to the first boost module and the second boost module.

3. The system according to claim 1, characterized in that The system further comprises: A processing module is connected to the controlled end of the power rail switching module and is used to send the switching control signal to the power rail switching module.

4. The system according to claim 3, characterized in that The processing module includes an application processor, which is connected to the power amplifier module via a signal transmission line. The signal transmission line is used to transmit the audio digital signal sent by the application processor to the power amplifier module, so that the power amplifier module performs power amplification based on the audio digital signal.

5. The system according to claim 1, characterized in that The power rail switching module is arranged on the audio power amplifier chip, the input end of which is respectively connected to the output ends of the first boost module and the second boost module, and the output end of which is connected to the power amplifier module.

6. The system according to claim 1, characterized in that The power rail switching module is arranged outside the audio power amplifier chip, the input end of which is connected to the output end of the power supply, and the output end of which is respectively connected to the input end of the first boost module and the input end of the second boost module.

7. The system according to claim 1, characterized in that The first boost module is disposed on the audio power amplifier chip, and the second boost module is disposed outside the audio power amplifier chip; or, The first boost module and the second boost module form a boost circuit module, and the boost circuit module is arranged outside the audio power amplifier chip or inside the audio power amplifier chip.

8. The system according to claim 1, characterized in that The power rail switching module includes a first switching switch and a second switching switch, wherein: The first switch is provided on the first power supply line and is used to switch on or off the first power supply line; The second switch is arranged on the second power supply line, and is used for switching on or off the second power supply line.

9. The system according to claim 1, characterized in that The second voltage is greater than the first voltage.

10. An electronic device, characterized in that: The electronic device comprises the audio power amplifier system according to any one of claims 1-9.

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