A multi-channel power amplifier driving power supply device and a sound box

Abstract

The application discloses a kind of multi-channel power amplifier driving power supply device and sound box, it can be applied to electronic circuit technical field.The application is provided by setting oscillation circuit, double-channel gate drive, including first isolation transformer and second isolation transformer isolation transformer circuit, including first half-wave rectification module and second half-wave rectification module rectification filter circuit, and including first power amplifier driving module and second power amplifier driving module power amplifier driving circuit, so that during working process, the differential signal of preset frequency can be provided by oscillation circuit and input into double-channel gate drive, to make double-channel gate drive provide two-way power amplifier driving power to power amplifier driving circuit, while isolation transformer circuit is arranged in double-channel gate drive and power amplifier driving circuit, so that the mutual interference process of two-way working power supply can be isolated, avoid damaging the components of other channels when one channel is damaged, and then effectively reduce equipment maintenance cost and generation cost.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to a multi-channel power amplifier driver power supply device and a speaker. Background Technology

[0002] In related technologies, multi-channel power amplifiers include four-channel constant-voltage digital power amplifiers, six-channel constant-voltage digital power amplifiers, and eight-channel constant-voltage digital power amplifiers. To save costs, the IRS2092 Class D audio amplifier driver is currently the most commonly used for driving multi-channel power amplifiers. A single-channel constant-voltage digital power amplifier requires two IRS2092 chips to form a bridged-through (BTL) output, which effectively improves power supply utilization. However, in this design, if one IRS2092 burns out due to some factor, other IRS2092s sharing the same power supply will also be affected and burn out (because any abnormality in its bootstrap power supply will burn out its IRS2092). For an eight-channel constant-voltage digital power amplifier, this means burning out 16 IRS2092 chips, resulting in very high maintenance costs. If each MOS driver chip uses an independent power supply, an eight-channel constant-voltage digital power amplifier would require 16 separate power supplies, significantly increasing production costs.

[0003] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the Invention

[0004] The main objective of this application is to provide a multi-channel power amplifier driver power supply device and speaker, which can effectively reduce the maintenance and production costs of the equipment.

[0005] To achieve the above objectives, one aspect of this application provides a multi-channel power amplifier driver power supply device, the multi-channel power amplifier driver power supply device comprising: Oscillating circuit; A dual-channel gate driver, wherein the first signal output terminal of the oscillation circuit is connected to the first signal input terminal of the dual-channel gate driver, and the second signal output terminal of the oscillation circuit is connected to the second signal input terminal of the dual-channel gate driver; the enable terminal of the dual-channel gate driver is connected to the power supply voltage; An isolation transformer circuit is provided, comprising a first isolation transformer and a second isolation transformer. The primary winding of the first isolation transformer is connected to the output terminal of the dual-channel gate driver, and the primary winding of the second isolation transformer is connected to the output terminal of the dual-channel gate driver. A rectifier and filter circuit, comprising a first half-wave rectifier module and a second half-wave rectifier module, wherein the input terminal of the first half-wave rectifier module is connected to the secondary winding of the first isolation transformer, and the input terminal of the second half-wave rectifier module is connected to the secondary winding of the second isolation transformer. The power amplifier driver circuit includes a first power amplifier driver module and a second power amplifier driver module. The power supply terminal of the first power amplifier driver module is connected to the output terminal of the first half-wave rectifier module, and the power supply terminal of the second power amplifier driver module is connected to the output terminal of the second half-wave rectifier module. The first power amplifier driver module and the second power amplifier driver module form a bridged mode to output driving power to the target power amplifier.

[0006] In some embodiments, the oscillation circuit includes: The first resistor has its first end connected to a preset power supply. The second resistor has its first end connected to the second end of the first resistor. The third resistor has its first end connected to the second end of the first resistor and the first end of the second resistor, respectively. A first capacitor, wherein a first terminal of the first capacitor is connected to a second terminal of the second resistor; The fourth resistor has its first end connected to the second end of the first capacitor; the connection point where the second end of the fourth resistor is connected to the second end of the third resistor serves as the first signal output terminal of the oscillation circuit.

[0007] In some embodiments, the multi-channel power amplifier driver power supply device further includes an inverter circuit, the inverter circuit comprising: The first inverter sub-circuit has its input terminal connected to the second terminal of the first capacitor and the first terminal of the fourth resistor, respectively, and its output terminal connected to the first terminal of the first capacitor and the second terminal of the second resistor, respectively. The second inverter sub-path has its input terminals connected to the second terminal of the first resistor and the first terminal of the second resistor, respectively. The third inverter sub-circuit has its input terminal connected to the output terminal of the second inverter sub-circuit; the output terminal of the third inverter sub-circuit is connected to the second terminal of the third resistor and the second terminal of the fourth resistor, respectively. The fourth inverter sub-path has its input terminal connected to the output terminal of the third inverter sub-path; the output terminal of the fourth inverter sub-path is connected to the first signal input terminal of the dual-channel gate driver. The fifth inverter sub-path has its input terminal connected to the output terminal of the fourth inverter sub-path, and its output terminal connected to the second signal input terminal of the dual-channel gate driver.

[0008] In some embodiments, the multi-channel power amplifier driver power supply device further includes: The fifth resistor has its first end connected to the power supply voltage and its second end connected to the enable terminal of the dual-channel gate driver.

[0009] In some embodiments, the multi-channel power amplifier driver power supply device further includes: The second capacitor has its first terminal connected to the first terminal of the fifth resistor, and its second terminal grounded. The third capacitor has its first terminal connected to the second terminal of the fifth resistor, and its second terminal is grounded. The fourth capacitor has its first terminal connected to the enable terminal and the power supply terminal of the dual-channel gate driver, respectively, and its second terminal grounded.

[0010] In some embodiments, the multi-channel power amplifier driver power supply device further includes: The fifth capacitor has its first terminal connected to the first output terminal of the dual-channel gate driver; its second terminal is connected through the first terminal of the primary winding of the first isolation transformer; and the second terminal of the primary winding of the first isolation transformer is connected to the second output terminal of the dual-channel gate driver.

[0011] In some embodiments, the multi-channel power amplifier driver power supply device further includes: A sixth capacitor, the first end of which is connected to the first output terminal of the dual-channel gate driver; the second end of the sixth capacitor is connected through the first end of the primary winding of the second isolation transformer, and the second end of the primary winding of the second isolation transformer is connected to the second output terminal of the dual-channel gate driver.

[0012] In some embodiments, the first half-wave rectifier module includes: The first diode, the positive terminal of which is connected to the first end of the secondary winding of the first isolation transformer; The seventh capacitor has its first terminal connected to the negative terminal of the first diode and serves as the output terminal of the first half-wave rectifier module; the second terminal of the seventh capacitor is connected to the second terminal of the secondary winding of the first isolation transformer.

[0013] In some embodiments, the second half-wave rectifier module includes: The second diode, the positive terminal of which is connected to the first end of the secondary winding of the second isolation transformer; The eighth capacitor has its first end connected to the negative terminal of the second diode and serves as the output terminal of the second half-wave rectifier module; the second end of the eighth capacitor is connected to the second end of the secondary winding of the second isolation transformer.

[0014] Another aspect of this application provides a speaker that is powered by the aforementioned multi-channel power amplifier driver power supply device.

[0015] The embodiments of this application include at least the following beneficial effects: This application provides a multi-channel power amplifier driver power supply device and speaker. This solution, by setting up an oscillation circuit, a dual-channel gate driver, an isolation transformer circuit including a first isolation transformer and a second isolation transformer, a rectifier filter circuit including a first half-wave rectifier module and a second half-wave rectifier module, and a power amplifier driver circuit including a first power amplifier driver module and a second power amplifier driver module, enables the oscillation circuit to provide a differential signal of a preset frequency to the dual-channel gate driver during operation, so that the dual-channel gate driver provides two power amplifier driver power supplies to the power amplifier driver circuit. At the same time, the isolation transformer circuit is set in the dual-channel gate driver and the power amplifier driver circuit, thereby isolating the mutual interference process of the two working power supplies, avoiding damage to the components of other channels when one channel is damaged, thereby effectively reducing the equipment maintenance cost and production cost. In addition, a rectifier filter circuit is set after the isolation transformer circuit, so that the working power supply output by the dual-channel gate driver can be rectified and filtered by the rectifier filter circuit, thereby effectively improving the stability of the working power supply input to the power amplifier driver circuit, thereby improving the working stability of the target power amplifier. Attached Figure Description

[0016] Figure 1 This is a circuit schematic diagram of a multi-channel power amplifier driver power supply device provided in an embodiment of this application; Figure 2 This is a schematic diagram of the power supply circuit in the inverter circuit provided in the embodiments of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit it. In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this application; they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this application as detailed in the appended claims.

[0018] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various concepts, but unless otherwise stated, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words “if,” “when,” or “in response to a determination” as used herein may be interpreted as “when…” or “when…” or “in response to a determination.”

[0019] As used in this application, the terms "at least one", "multiple", "each", "any", etc., "at least one" includes one, two or more, "multiple" includes two or more, "each" refers to each of the corresponding multiples, and "any" refers to any one of the multiples.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0021] In related technologies, multi-channel power amplifiers include four-channel constant-voltage digital power amplifiers, six-channel constant-voltage digital power amplifiers, and eight-channel constant-voltage digital power amplifiers. To save costs, the IRS2092 Class D audio amplifier driver is currently the most commonly used for driving multi-channel power amplifiers. A single-channel constant-voltage digital power amplifier requires two IRS2092 chips to form a bridged-through (BTL) output, which effectively improves power supply utilization. However, in this design, if one IRS2092 burns out due to some factor, other IRS2092s sharing the same power supply will also be affected and burn out (because any abnormality in its bootstrap power supply will burn out its IRS2092). For an eight-channel constant-voltage digital power amplifier, this means burning out 16 IRS2092 chips, resulting in very high maintenance costs. If each MOS driver chip uses an independent power supply, an eight-channel constant-voltage digital power amplifier would require 16 separate power supplies, significantly increasing production costs.

[0022] In view of this, the present application provides a multi-channel power amplifier driver power supply device and speaker, which can effectively reduce the maintenance and production costs of the equipment.

[0023] The embodiments of this application will be described in detail below with reference to the accompanying drawings: Reference Figure 1 This application provides a multi-channel power amplifier driver power supply device, which includes an oscillation circuit, a dual-channel gate driver U2, an isolation transformer circuit, a rectifier and filter circuit, and a power amplifier driver circuit. The first signal output terminal of the oscillation circuit is connected to the first signal input terminal of the dual-channel gate driver, and the second signal output terminal of the oscillation circuit is connected to the second signal input terminal of the dual-channel gate driver. The enable terminal of the dual-channel gate driver U2 is connected to the power supply voltage VCC, which can be the normal operating voltage. The isolation transformer circuit includes a first isolation transformer L1 and a second isolation transformer L2. The primary winding of the first isolation transformer L1 is connected to the output terminal of the dual-channel gate driver U2, and the primary winding of the second isolation transformer L2 is also connected to the output terminal of the dual-channel gate driver U2. The rectifier and filter circuit... The circuit includes a first half-wave rectifier module and a second half-wave rectifier module. The input terminal of the first half-wave rectifier module is connected to the secondary winding of the first isolation transformer, and the input terminal of the second half-wave rectifier module is connected to the secondary winding of the second isolation transformer. The power amplifier drive circuit includes a first power amplifier drive module and a second power amplifier drive module. The power supply terminal VCC of the first power amplifier drive module is connected to the output terminal of the first half-wave rectifier module, and the power supply terminal VCC of the second power amplifier drive module is connected to the output terminal of the second half-wave rectifier module. The first power amplifier drive module and the second power amplifier drive module form a bridged mode to output drive power to the target power amplifier A1.

[0024] It is understood that the target power amplifier in this embodiment can be a single-channel constant voltage power amplifier. For multi-channel constant voltage power amplifiers, the working principle of this embodiment is the same as that of a single-channel constant voltage power amplifier.

[0025] It is understandable that, such as Figure 1 As shown, the oscillation circuit in this embodiment includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, and a fourth resistor R4. The first terminal of the first resistor R1 is connected to a preset operating power supply (e.g., a 5V operating voltage); the first terminal of the second resistor R2 is connected to the second terminal of the first resistor R1; the first terminal of the third resistor R3 is connected to the second terminals of both the first and second resistors R2; the first terminal of the first capacitor C1 is connected to the second terminal of the second resistor R2; the first terminal of the fourth resistor R4 is connected to the second terminal of the first capacitor C1; and the connection point between the second terminals of the fourth resistor R4 and the third resistor R3 serves as the first signal output terminal of the oscillation circuit.

[0026] Specifically, in this embodiment, by adjusting the resistance and capacitance values ​​in the oscillation circuit, the oscillation circuit can output a differential signal at a preset frequency, such as a 1MHz differential signal. The higher the preset frequency in this embodiment, the higher the power density of the isolation transformer in the subsequent circuit. This allows for a reduction in the size of the isolation transformer while maintaining the same voltage, thus lowering production costs. The differential signal output in this embodiment can simultaneously drive two isolation transformers, thereby effectively reducing production costs while ensuring the same operational performance.

[0027] It is understandable that, such as Figure 1 As shown, the multi-channel power amplifier driver power supply device of this embodiment also includes an inverter circuit. The inverter circuit includes a first inverter sub-circuit U1C, a second inverter sub-circuit U1F, a third inverter sub-circuit U1E, a fourth inverter sub-circuit U1D, and a fifth inverter sub-circuit U1B. The input terminal of the first inverter sub-circuit U1C is connected to the second terminal of the first capacitor C1 and the first terminal of the fourth resistor R4, respectively. The output terminal of the first inverter sub-circuit U1C is connected to the first terminal of the first capacitor C1 and the second terminal of the second resistor R2, respectively. The input terminal of the second inverter sub-circuit U1F is connected to the second terminal of the first resistor R1 and the first terminal of the second resistor R2, respectively. The input terminal of the third inverter sub-circuit U1E is connected to the output terminal of the second inverter sub-circuit U1F, respectively. The output terminal of the third inverter sub-circuit U1E is connected to the second terminal of the third resistor R3 and the second terminal of the fourth resistor R4, respectively. The input terminal of the fourth inverter sub-circuit U1D is connected to the output terminal of the third inverter sub-circuit U1E, respectively. The output terminal of the fourth inverter sub-circuit U1D is connected to the first signal input terminal of the dual-channel gate driver U2, respectively. The input terminal of the fifth inverter sub-circuit U1B is connected to the output terminal of the fourth inverter sub-circuit U1D, respectively. The output terminal of the fifth inverter sub-circuit U1B is connected to the second signal input terminal of the dual-channel gate driver U2, respectively.

[0028] Specifically, the inverter circuit in this embodiment can employ a six-channel Schmitt-triggered inverter chip. This embodiment provides six Schmitt-triggered inverter chips connected to the oscillation circuit, thereby further denoising and de-jittering the signal in the circuit, thus providing a stable power signal for subsequent circuits. In this application embodiment, as... Figure 2As shown, the inverter circuit also includes a sixth resistor R6, a ninth capacitor C9, and a sixth inverter sub-circuit U1A. The first end of the sixth resistor R6 is connected to the power supply terminal (e.g., 5V) of the inverter circuit. The second end of the sixth resistor R6 is connected to the first terminal of the ninth capacitor C9 and the power supply terminal (pin 4) of the sixth inverter sub-circuit U1A at the first node. The second end of the ninth capacitor C9 is connected to the ground terminal (pin 7) of the sixth inverter sub-circuit U1A. It can be understood that in this embodiment, the sixth resistor is a current-limiting resistor, and the ninth capacitor is a filter capacitor. After the input power supply is current-limited and filtered by the sixth resistor and the ninth capacitor in this embodiment, the operating power is provided to the first inverter sub-circuit, the second inverter sub-circuit, the third inverter sub-circuit, the fourth inverter sub-circuit, and the fifth inverter sub-circuit through the first node, thereby effectively improving the stability of the circuit operation.

[0029] It is understandable that, such as Figure 1 As shown, the multi-channel power amplifier driver power supply device in this embodiment also includes a fifth resistor R5. The first terminal of the fifth resistor R5 is connected to the power supply voltage, and the second terminal of the fifth resistor R5 is connected to the enable terminal of the dual-channel gate driver U2. Specifically, the fifth resistor in this embodiment is a current-limiting resistor. This current-limiting resistor protects the power supply, thereby further ensuring that the power amplifier driver power supplies between channels do not interfere with each other. This improves the stability of the circuit operation while effectively reducing maintenance costs.

[0030] It is understandable that, such as Figure 1 As shown, the channel power amplifier driver power supply device further includes a second capacitor C2, a third capacitor C3, and a fourth capacitor C4. The first terminal of the second capacitor C2 is connected to the first terminal of the fifth resistor R5, and the second terminal of the second capacitor C2 is grounded. The first terminal of the third capacitor C3 is connected to the second terminal of the fifth resistor R5, and the second terminal of the third capacitor C3 is grounded. The first terminal of the fourth capacitor C4 is connected to both the enable terminal and the power supply terminal of the dual-channel gate driver U2, and the second terminal of the fourth capacitor C4 is grounded. Specifically, in this embodiment, the second, third, and fourth capacitors are all power supply filter capacitors. By setting several power supply filter capacitors, capacitor filtering can be performed at the input and output terminals of the dual-channel gate driver, thereby improving the operating stability of the dual-channel gate driver and the stability of the output power supply.

[0031] It is understandable that, such as Figure 1As shown, the multi-channel power amplifier driver power supply device also includes a fifth capacitor C5 and a sixth capacitor C6. The first terminal of the fifth capacitor C5 is connected to the first output terminal of the dual-channel gate driver U2; the second terminal of the fifth capacitor C5 is connected through the first terminal of the primary winding of the first isolation transformer L1; the second terminal of the primary winding of the first isolation transformer L1 is connected to the second output terminal of the dual-channel gate driver U2. The first terminal of the sixth capacitor C6 is connected to the first output terminal of the dual-channel gate driver U2; the second terminal of the sixth capacitor C6 is connected through the first terminal of the primary winding of the second isolation transformer L2; the second terminal of the primary winding of the second isolation transformer L2 is connected to the second output terminal of the dual-channel gate driver U2. Specifically, in this embodiment, both the fifth and sixth capacitors are DC blocking capacitors. This embodiment uses the fifth and sixth capacitors to perform DC blocking and AC passing processing on the power input to the first and second isolation transformers, respectively, thereby allowing the power signal to pass stably through the isolation transformers.

[0032] It is understandable that, such as Figure 1 As shown, the first half-wave rectifier module includes a first diode D1 and a seventh capacitor C7. The anode of the first diode D1 is connected to the first terminal of the secondary winding of the first isolation transformer L1; the first terminal of the seventh capacitor C7, connected to the cathode of the first diode D1, serves as the output terminal of the first half-wave rectifier module; the second terminal of the seventh capacitor C7 is connected to the second terminal of the secondary winding of the first isolation transformer L1. The second half-wave rectifier module includes a second diode D2 and an eighth capacitor C8. The anode of the second diode D2 is connected to the first terminal of the secondary winding of the second isolation transformer L2; the first terminal of the eighth capacitor C8, connected to the cathode of the second diode D2, serves as the output terminal of the second half-wave rectifier module; the second terminal of the eighth capacitor C8 is connected to the second terminal of the secondary winding of the second isolation transformer L2. In this embodiment, the first half-wave rectifier and filter module is formed by the first diode and the seventh capacitor, and the second half-wave rectifier module is formed by the second diode and the eighth capacitor, thereby rectifying and filtering the two power signals output from the isolation transformer to obtain the operating power required by the power amplifier drive circuit.

[0033] Specifically, in this embodiment, both the first power amplifier driver module IC1 and the second power amplifier driver module IC2 in the power amplifier driver circuit can be composed of an IRS2092 chip and its corresponding circuit structure. After the two power amplifier driver modules are connected in a bridged mode, they can provide the corresponding driving power to the target power amplifier, thereby enabling the target power amplifier to work stably.

[0034] As described above, this embodiment effectively improves the power supply's anti-interference capability by employing isolated voltage power supply, preventing accidental damage to one channel from interfering with the normal operation of other channels' power amplifiers. Furthermore, this embodiment includes current-limiting resistors to protect the power supply, ensuring that the power amplifier drive power supplies between channels do not interfere with each other, thus improving circuit stability and effectively reducing maintenance costs. Additionally, this embodiment uses two transformers to obtain two identical isolation voltages, ensuring the target operating effect is achieved while controlling production costs. Moreover, the RC oscillation circuit in this embodiment uses a frequency above 1MHz, thereby increasing the transformer power density, reducing transformer size, and further reducing production costs.

[0035] Furthermore, embodiments of this application also provide a speaker, which... Figure 1 The multi-channel power amplifier driver power supply shown provides the drive power.

[0036] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0037] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.

[0038] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0039] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.

[0040] The units described above as separate components may or may not be physically separate. 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 can be selected to achieve the purpose of this embodiment according to actual needs.

[0041] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A multi-channel power amplifier driver power supply device, characterized in that, The multi-channel power amplifier driver power supply device includes: Oscillating circuit; A dual-channel gate driver, wherein the first signal output terminal of the oscillation circuit is connected to the first signal input terminal of the dual-channel gate driver, and the second signal output terminal of the oscillation circuit is connected to the second signal input terminal of the dual-channel gate driver; the enable terminal of the dual-channel gate driver is connected to the power supply voltage; An isolation transformer circuit is provided, comprising a first isolation transformer and a second isolation transformer. The primary winding of the first isolation transformer is connected to the output terminal of the dual-channel gate driver, and the primary winding of the second isolation transformer is connected to the output terminal of the dual-channel gate driver. A rectifier and filter circuit, comprising a first half-wave rectifier module and a second half-wave rectifier module, wherein the input terminal of the first half-wave rectifier module is connected to the secondary winding of the first isolation transformer, and the input terminal of the second half-wave rectifier module is connected to the secondary winding of the second isolation transformer. The power amplifier driver circuit includes a first power amplifier driver module and a second power amplifier driver module. The power supply terminal of the first power amplifier driver module is connected to the output terminal of the first half-wave rectifier module, and the power supply terminal of the second power amplifier driver module is connected to the output terminal of the second half-wave rectifier module. The first power amplifier driver module and the second power amplifier driver module form a bridged mode to output driving power to the target power amplifier.

2. The multi-channel power amplifier driver power supply device according to claim 1, characterized in that, The oscillation circuit includes: The first resistor has its first end connected to a preset power supply. The second resistor has its first end connected to the second end of the first resistor. The third resistor has its first end connected to the second end of the first resistor and the first end of the second resistor, respectively. A first capacitor, wherein a first terminal of the first capacitor is connected to a second terminal of the second resistor; The fourth resistor has its first end connected to the second end of the first capacitor; the connection point where the second end of the fourth resistor is connected to the second end of the third resistor serves as the first signal output terminal of the oscillation circuit.

3. The multi-channel power amplifier driver power supply device according to claim 2, characterized in that, The multi-channel power amplifier driver power supply device further includes an inverter circuit, the inverter circuit including... The first inverter sub-circuit has its input terminal connected to the second terminal of the first capacitor and the first terminal of the fourth resistor, respectively, and its output terminal connected to the first terminal of the first capacitor and the second terminal of the second resistor, respectively. The second inverter sub-path has its input terminals connected to the second terminal of the first resistor and the first terminal of the second resistor, respectively. The third inverter sub-path, wherein the input terminal of the third inverter sub-path is connected to the output terminal of the second inverter sub-path; The output terminal of the third inverter sub-circuit is connected to the second terminal of the third resistor and the second terminal of the fourth resistor, respectively; The fourth inverter sub-path, the input terminal of which is connected to the output terminal of the third inverter sub-path; The output terminal of the fourth inverter sub-path is connected to the first signal input terminal of the dual-channel gate driver; The fifth inverter sub-path has its input terminal connected to the output terminal of the fourth inverter sub-path, and its output terminal connected to the second signal input terminal of the dual-channel gate driver.

4. The multi-channel power amplifier driver power supply device according to claim 3, characterized in that, The multi-channel power amplifier driver power supply device further includes: The fifth resistor has its first end connected to the power supply voltage and its second end connected to the enable terminal of the dual-channel gate driver.

5. The multi-channel power amplifier driver power supply device according to claim 4, characterized in that, The multi-channel power amplifier driver power supply device further includes: The second capacitor has its first terminal connected to the first terminal of the fifth resistor, and its second terminal grounded. The third capacitor has its first terminal connected to the second terminal of the fifth resistor, and its second terminal is grounded. The fourth capacitor has its first terminal connected to the enable terminal and the power supply terminal of the dual-channel gate driver, respectively, and its second terminal grounded.

6. The multi-channel power amplifier driver power supply device according to claim 1, characterized in that, The multi-channel power amplifier driver power supply device further includes: The fifth capacitor has its first terminal connected to the first output terminal of the dual-channel gate driver; its second terminal is connected through the first terminal of the primary winding of the first isolation transformer; and the second terminal of the primary winding of the first isolation transformer is connected to the second output terminal of the dual-channel gate driver.

7. The multi-channel power amplifier driver power supply device according to claim 1, characterized in that, The multi-channel power amplifier driver power supply device further includes: A sixth capacitor, the first end of which is connected to the first output terminal of the dual-channel gate driver; the second end of the sixth capacitor is connected through the first end of the primary winding of the second isolation transformer, and the second end of the primary winding of the second isolation transformer is connected to the second output terminal of the dual-channel gate driver.

8. The multi-channel power amplifier driver power supply device according to claim 1, characterized in that, The first half-wave rectifier module includes: The first diode, the positive terminal of which is connected to the first end of the secondary winding of the first isolation transformer; The seventh capacitor has its first terminal connected to the negative terminal of the first diode and serves as the output terminal of the first half-wave rectifier module; the second terminal of the seventh capacitor is connected to the second terminal of the secondary winding of the first isolation transformer.

9. The multi-channel power amplifier driver power supply device according to claim 1, characterized in that, The second half-wave rectifier module includes: The second diode, the positive terminal of which is connected to the first end of the secondary winding of the second isolation transformer; The eighth capacitor has its first end connected to the negative terminal of the second diode and serves as the output terminal of the second half-wave rectifier module; the second end of the eighth capacitor is connected to the second end of the secondary winding of the second isolation transformer.

10. A speaker, characterized in that, The driving power is provided by the multi-channel power amplifier driving power supply device according to any one of claims 1-9.

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