A power management circuit
By dynamically adjusting the power management circuit and applying the voltage regulator circuit, the issues of size, heat dissipation, and cost in the power supply design of portable speakers are solved, achieving efficient and economical power management and improving speaker performance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN GIEC DIGITAL CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-06-23
AI Technical Summary
In traditional portable speaker power supply designs, as the output power of the amplifier circuit increases, the total power of the power supply rises sharply, resulting in an increase in the size of the power supply circuit, increased difficulty in heat dissipation, increased cost, and a negative impact on portability and safety.
The power management circuit is adopted, including a main control circuit, a lithium battery charging circuit, a power amplifier circuit, and a voltage regulator circuit. By monitoring the lithium battery status in real time, the charging and power amplifier circuit output power is dynamically adjusted. Combined with the voltage regulator circuit, the power supply size is reduced and the energy efficiency ratio is optimized.
Extending lithium battery life, improving safety and efficiency, reducing production costs, achieving portable design goals, avoiding energy waste, simplifying heat dissipation issues, and enhancing market competitiveness.
Smart Images
Figure CN224401208U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speaker technology, specifically to a power management circuit. Background Technology
[0002] Driven by consumers' dual pursuit of sound quality and portability, the portable speaker market is undergoing rapid technological innovation. On one hand, users expect a more powerful and clearer sound experience, prompting manufacturers to continuously increase the output power of speaker amplifier circuits. On the other hand, portability, as a core selling point of these products, requires devices to provide long lithium battery life while remaining compact and lightweight. However, traditional power supply designs have gradually become one of the main bottlenecks limiting technological progress.
[0003] In traditional portable speaker power supply designs, the power input is usually set to the sum of the amplifier power and the charging power to ensure that the speaker can charge the built-in lithium battery while it is working.
[0004] However, with the continuous increase in the output power of amplifier circuits, continuing to use existing power supply design concepts will lead to a sharp increase in the total power of the power supply. On the one hand, high-power power supplies require larger capacity transformers, capacitors, and other components, resulting in a significant increase in the size of the power supply circuit. This seriously contradicts the original design intention of portable speakers to be compact, lightweight, and easy to carry. On the other hand, the increase in power supply power inevitably leads to higher heat generation, and the limited internal space of portable speakers makes heat dissipation design much more difficult. Heat accumulation can easily cause a decline in the performance of the power supply and other components inside the speaker, and even lead to safety hazards. In addition, high-power power supplies have higher requirements for the performance and quality of components, and the corresponding procurement, R&D, and production costs will also increase. This not only increases the production burden of enterprises but also raises the market price of products, weakening their market competitiveness. Therefore, it is urgent to explore new power supply design technologies and solutions to solve the power supply design challenges faced by portable speakers under high power requirements. Faced with these challenges, how to increase the output power of amplifier circuits without affecting portability and effectively solve the resulting heat dissipation and cost problems has become a key technical problem that urgently needs to be solved in the portable speaker field. Utility Model Content
[0005] This invention addresses the shortcomings and deficiencies of existing technologies by providing a low-cost and simple power management circuit.
[0006] To achieve the above objectives, the present invention provides a power management circuit for use in a speaker, comprising a power input terminal, a power supply circuit, a main control circuit for detecting lithium battery voltage, dynamically adjusting charging status, and dynamically adjusting the output power of the power amplifier circuit, a power amplifier circuit, a voltage regulator circuit, and a lithium battery charging circuit. The power input terminal is electrically connected to the input terminal of the power supply circuit, the output terminal of the power supply circuit is electrically connected to the input terminal of the lithium battery charging circuit, the output terminal of the lithium battery charging circuit is electrically connected to the main control circuit, the power amplifier circuit is electrically connected to the main control circuit, and the voltage regulator circuit is electrically connected to the power supply circuit, the power amplifier circuit, and the lithium battery charging circuit.
[0007] Furthermore, the main control circuit includes a main control chip, a first resistor, a second resistor, and a third resistor; one end of the first resistor is grounded, and the other end is electrically connected to the 44th pin of the main control chip; one end of the second resistor is connected to a 3.3V voltage, and the other end is electrically connected to the 46th pin of the main control chip; one end of the third resistor is electrically connected to the second resistor, and the other end is electrically connected to the 45th pin of the main control chip; the 32nd, 33rd, and 70th pins of the main control chip are all electrically connected to the lithium battery charging circuit; and the 64th, 65th, 66th, 46th, 45th, and 44th pins of the main control chip are all electrically connected to the power amplifier circuit.
[0008] Further, the lithium battery charging circuit includes a lithium battery interface, a power management chip, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, and a first inductor; a lithium battery is installed on the lithium battery interface; one end of the fourth resistor is electrically connected to the twelfth pin of the power management chip, and the other end is electrically connected to the thirty-second pin of the main control chip; the fifth resistor and the sixth resistor are connected in series. One end of the seventh resistor is connected to a VLDO, and the other end is electrically connected to the fifth pin of the power management chip; the thirty-third pin of the main control chip is electrically connected to the common terminal of the fifth and sixth resistors; one end of the seventh resistor is grounded, and the other end is electrically connected to the thirty-third pin of the main control chip; one end of the eighth resistor is grounded, and the other end is electrically connected to the eleventh pin of the power management chip; the seventeenth pin of the power management chip is electrically connected to the eighteenth pin of the power management chip; one end of the second capacitor is grounded, and the other end is electrically connected to the eighteenth pin of the power management chip; one end of the third capacitor is grounded, and the other end is electrically connected to the fifteenth pin of the power management chip. The ninth and tenth resistors are connected in series, with one end electrically connected to the third capacitor and the other end grounded. The tenth pin of the power management chip is electrically connected to the ninth resistor. One end of the eleventh resistor is grounded, and the other end is electrically connected to the sixteenth pin of the power management chip. One end of the twelfth resistor is grounded, and the other end is electrically connected to the seventh pin of the power management chip. The first pin of the power management chip is grounded. The twenty-first, twenty, and fourteenth pins of the power management chip are all electrically connected to the first pin of the power management chip. One end of the fourth capacitor is electrically connected to the fourth pin of the power management chip, and the other end is electrically connected to the power management chip. The third pin of the chip is electrically connected; the second pin of the power management chip is electrically connected to the fourth capacitor; the first inductor and the fifth capacitor are connected in series, with one end grounded and the other end connected to the second pin of the power management chip; the thirteenth pin of the power management chip is electrically connected to the fifth capacitor; one end of the sixth capacitor is grounded and the other end is connected to the first inductor; one end of the thirteenth resistor is connected to the tenth pin of the power management chip and the other end is connected to the fourth pin of the lithium battery interface; the seventh capacitor and the eighth capacitor are connected in parallel, with one end connected to the first pin of the lithium battery interface and the other end connected to the fifth pin of the lithium battery interface.The second and third pins of the lithium battery interface are both electrically connected to the first pin of the lithium battery interface; the sixth and seventh pins of the lithium battery interface are both electrically connected to the fifth pin of the lithium battery interface; the fourteenth and fifteenth resistors are connected in series, with one end grounded and the other end electrically connected to the first pin of the lithium battery interface; one end of the sixteenth resistor is electrically connected to the fifteenth resistor, and the other end is electrically connected to the seventieth pin of the main control chip; one end of the ninth capacitor is grounded, and the other end is electrically connected to the sixteenth resistor.
[0009] Further, the power amplifier circuit includes a Bluetooth audio chip, a speaker, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor, a fortieth capacitor, a forty-first capacitor, a forty-second capacitor, and a forty-third capacitor; one end of the seventeenth resistor is connected to the sixty-sixth pin of the main control chip. One end of the eighteenth resistor is electrically connected to the sixty-fifth pin of the main control chip, and the other end is electrically connected to the seventh pin of the Bluetooth audio chip; one end of the nineteenth resistor is electrically connected to the sixty-fourth pin of the main control chip, and the other end is electrically connected to the eighth pin of the Bluetooth audio chip; one end of the twentieth resistor is electrically connected to the second resistor, and the other end is electrically connected to the tenth pin of the Bluetooth audio chip; one end of the twenty-first resistor is electrically connected to the third resistor, and the other end is electrically connected to the eleventh pin of the Bluetooth audio chip; one end of the twenty-second resistor is electrically connected to the first resistor, and the other end is electrically connected to the twelfth pin of the Bluetooth audio chip; the fifth pin of the Bluetooth audio chip is grounded; one end of the tenth capacitor is electrically connected to the fifth pin of the Bluetooth audio chip, and the other end is electrically connected to the fourth pin of the Bluetooth audio chip; one end of the twenty-third resistor is electrically connected to the third pin of the Bluetooth audio chip, and the other end is electrically connected to the second pin of the Bluetooth audio chip; one end of the second inductor is electrically connected to the second pin of the Bluetooth audio chip, and the other end is connected to 3.A 3V voltage is applied. The eleventh and twelfth capacitors are connected in parallel, one end grounded and the other end connected to the second inductor. One end of the thirteenth capacitor is grounded and the other end connected to the thirteenth pin of the Bluetooth audio chip. The first pin of the Bluetooth audio chip is grounded, and the fourteenth pin is connected to the first pin of the Bluetooth audio chip. The fourteenth, fifteenth, sixteenth, and seventeenth capacitors are connected in parallel, one end grounded and the other end connected to the twenty-seventh pin of the Bluetooth audio chip. The twenty-eighth pin of the Bluetooth audio chip is connected to the fourteenth capacitor. The eighteenth, nineteenth, twentieth, and twenty-first capacitors are connected in parallel, one end grounded and the other end connected to the sixteenth pin of the Bluetooth audio chip. The fifteenth pin of the Bluetooth audio chip is connected to the eighteenth capacitor. The twenty-fourth pin of the Bluetooth audio chip is grounded, and the nineteenth pin is connected to the twenty-fourth pin of the Bluetooth audio chip. One end of the twenty-second capacitor is connected to the twenty-sixth pin of the Bluetooth audio chip, and the other end is connected to the twenty-third pin of the Bluetooth audio chip. The system has five electrical connections: one end of the 23rd capacitor is connected to the 23rd pin of the Bluetooth audio chip, and the other end is connected to the 22nd pin of the Bluetooth audio chip; the 24th resistor, 24th capacitor, 25th capacitor, and 25th resistor are connected in series, with one end connected to the 22nd capacitor and the other end connected to the 23rd pin of the Bluetooth audio chip; one end of the third inductor is connected to the 24th resistor and the other end is connected to the speaker; one end of the fourth inductor is connected to the 25th resistor and the other end is connected to the speaker; the 26th capacitor and 27th capacitor are connected in series, with one end connected to the third inductor and the other end connected to the fourth inductor; the 26th resistor, 28th capacitor, 29th capacitor, and 27th resistor are connected in series, with one end connected to the 26th capacitor and the other end connected to the 27th capacitor; one end of the 30th capacitor is connected to the 26th resistor and the other end is connected to the 27th resistor; and the 31st capacitor and 32nd capacitor are connected in series, with one end connected to the speaker and the other end connected to the speaker.
[0010] One end of the thirty-third capacitor is electrically connected to the twentieth pin of the Bluetooth audio chip, and the other end is electrically connected to the twenty-first pin of the Bluetooth audio chip. One end of the thirty-fourth capacitor is electrically connected to the eighteenth pin of the Bluetooth audio chip, and the other end is electrically connected to the seventeenth pin of the Bluetooth audio chip. The twenty-eighth resistor, the thirty-fifth capacitor, the thirty-sixth capacitor, and the twenty-ninth resistor are connected in series, with one end electrically connected to the thirty-third capacitor and the other end electrically connected to the twenty-first pin of the Bluetooth audio chip. One end of the fifth inductor is electrically connected to the twenty-eighth resistor, and the other end is electrically connected to the speaker. One end of the sixth inductor... The 29th resistor is connected to the 37th capacitor, and the other end is connected to the speaker. The 37th and 38th capacitors are connected in series, with one end connected to the 5th inductor and the other end connected to the 6th inductor. The 30th, 39th, 41st, and 31st resistors are connected in series, with one end connected to the 37th capacitor and the other end connected to the 38th capacitor. The 41st capacitor is connected to the 30th resistor at one end and the other end connected to the 31st resistor at the other end. The 42nd and 43rd capacitors are connected in series, with one end connected to the speaker and the other end connected to the speaker.
[0011] Further; the voltage regulator circuit includes a voltage regulator chip, a power interface, a seventh inductor, an eighth inductor, a ninth inductor, a forty-fourth capacitor, a forty-fifth capacitor, a forty-sixth capacitor, a forty-seventh capacitor, a forty-eighth capacitor, a forty-ninth capacitor, a fiftieth capacitor, a fifty-first capacitor, a fifty-second capacitor, a fifty-third capacitor, a fifty-fourth capacitor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, and a thirty-seventh resistor; the power interface is electrically connected to the power supply circuit, and one end of the seventh inductor and the eighth inductor are connected in parallel and electrically connected to the power interface, and the other end is connected to the power supply circuit. The eighth pin of the voltage regulator chip is electrically connected; the common terminal of the seventh and eighth inductors is electrically connected to the twenty-seventh and sixteenth pins of the Bluetooth audio chip; the forty-fourth, forty-fifth, and forty-sixth capacitors are connected in parallel, one end of which is electrically connected to the eighth inductor, and the other end of which is electrically connected to the eighth pin of the voltage regulator chip; the common terminal of the forty-fourth, forty-fifth, and forty-sixth capacitors is grounded; the thirty-second and thirty-third resistors are connected in series, one end of which is grounded, and the other end of which is electrically connected to the forty-sixth capacitor; the thirty-fourth resistor and the forty-seventh capacitor are connected in series, one end of which is grounded. One end of the capacitor is electrically connected to the eighth pin of the voltage regulator chip, and the other end is electrically connected to the thirty-third resistor; one end of the forty-eighth capacitor is electrically connected to the sixth pin of the voltage regulator chip, and the other end is electrically connected to the forty-seventh capacitor; the seventh pin of the voltage regulator chip is electrically connected to the thirty-third resistor; the third pin of the voltage regulator chip is electrically connected to the thirty-second resistor; one end of the forty-ninth capacitor is electrically connected to the first pin of the voltage regulator chip, and the other end is electrically connected to the second pin of the voltage regulator chip; the ninth inductor, the thirty-fifth resistor, the thirty-sixth resistor, and the fiftieth capacitor are connected in series, and one end is connected to the... Two pins are electrically connected, and the other end is electrically connected to the fourth pin of the voltage regulator chip; the common terminal of the thirty-sixth resistor and the fiftieth capacitor is grounded; the fifth pin of the voltage regulator chip is electrically connected to the thirty-fifth resistor; the fifty-first capacitor and the thirty-seventh resistor are connected in series, one end of which is electrically connected to the ninth inductor, and the other end of which is electrically connected to the fifth pin of the voltage regulator chip; one end of the fifty-second capacitor is grounded, and the other end is electrically connected to the fifty-first capacitor; one end of the fifty-third capacitor is grounded, and the other end is electrically connected to the fifty-second capacitor; one end of the fifty-fourth capacitor is grounded, and the other end is electrically connected to the fifty-third capacitor.
[0012] The beneficial effects of this utility model are:
[0013] This invention provides a power management circuit that utilizes a main control circuit to monitor the lithium battery's status in real time and dynamically adjusts the charging state based on the current voltage. This not only extends the lithium battery's lifespan but also improves its safety and efficiency. This intelligent management allows the lithium battery to charge and discharge under optimal conditions. The close integration of the power amplifier circuit and the main control circuit allows for dynamic adjustment of the power amplifier's output power according to actual playback needs. This approach ensures high-quality sound output while effectively avoiding unnecessary energy waste, thus improving the overall system's energy efficiency ratio. Through the effective integration of the above circuits, especially the application of a voltage regulator circuit, the overall size of the power supply is significantly reduced, simplifying heat dissipation. This not only helps achieve the goal of portable design but also reduces potential risks caused by overheating. Attached Figure Description
[0014] Figure 1 This is a block diagram illustrating the working principle of a power management circuit according to this utility model.
[0015] Figure 2 This is a circuit diagram of a power management circuit according to the present invention.
[0016] Figure 3 This is a circuit diagram of a voltage regulator circuit in a power management circuit according to the present invention.
[0017] Figure 4 This is an enlarged circuit diagram of the main control circuit and lithium battery charging circuit in a power management circuit according to the present invention.
[0018] Figure 5 This is an enlarged circuit diagram of the power amplifier circuit in a power management circuit according to this utility model. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0022] This utility model proposes a power management circuit.
[0023] In the embodiments of this utility model, such as Figure 1-5 As shown, this power management circuit, applied to a speaker, includes a power input terminal, a power supply circuit, a main control circuit for detecting lithium battery voltage, dynamically adjusting charging status, and dynamically adjusting the output power of the power amplifier circuit, a power amplifier circuit, a voltage regulator circuit, and a lithium battery charging circuit. The power input terminal is electrically connected to the input terminal of the power supply circuit, the output terminal of the power supply circuit is electrically connected to the input terminal of the lithium battery charging circuit, the output terminal of the lithium battery charging circuit is electrically connected to the main control circuit, the power amplifier circuit is electrically connected to the main control circuit, and the voltage regulator circuit is electrically connected to the power supply circuit, the power amplifier circuit, and the lithium battery charging circuit.
[0024] In this embodiment, the main control circuit includes a main control chip, a first resistor, a second resistor, and a third resistor; one end of the first resistor is grounded, and the other end is electrically connected to the 44th pin of the main control chip; one end of the second resistor is connected to a 3.3V voltage, and the other end is electrically connected to the 46th pin of the main control chip; one end of the third resistor is electrically connected to the second resistor, and the other end is electrically connected to the 45th pin of the main control chip; the 32nd, 33rd, and 70th pins of the main control chip are all electrically connected to the lithium battery charging circuit; and the 64th, 65th, 66th, 46th, 45th, and 44th pins of the main control chip are all electrically connected to the power amplifier circuit.
[0025] In this embodiment, the lithium battery charging circuit includes a lithium battery interface, a power management chip, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, and a first inductor; a lithium battery is installed on the lithium battery interface; one end of the fourth resistor is electrically connected to the twelfth pin of the power management chip, and the other end is electrically connected to the thirty-second pin of the main control chip; both the fifth resistor and the sixth resistor... The following resistors are connected in series: one end is connected to a VLDO, and the other end is electrically connected to pin 5 of the power management chip; pin 33 of the main control chip is electrically connected to the common terminal of the fifth and sixth resistors; one end of the seventh resistor is grounded, and the other end is electrically connected to pin 33 of the main control chip; one end of the eighth resistor is grounded, and the other end is electrically connected to pin 11 of the power management chip; pin 17 of the power management chip is electrically connected to pin 18 of the power management chip; one end of the second capacitor is grounded, and the other end is electrically connected to pin 18 of the power management chip; one end of the third capacitor is grounded, and the other end is connected to pin 15 of the power management chip. Electrically connected, the ninth and tenth resistors are connected in series, one end of which is electrically connected to the third capacitor, and the other end is grounded; the tenth pin of the power management chip is electrically connected to the ninth resistor, one end of the eleventh resistor is grounded, and the other end is electrically connected to the sixteenth pin of the power management chip; one end of the twelfth resistor is grounded, and the other end is electrically connected to the seventh pin of the power management chip; the first pin of the power management chip is grounded, and the twenty-first, twenty, and fourteenth pins of the power management chip are all electrically connected to the first pin of the power management chip; one end of the fourth capacitor is electrically connected to the fourth pin of the power management chip, and the other end is electrically connected to the power management chip. The third pin of the chip is electrically connected; the second pin of the power management chip is electrically connected to the fourth capacitor; the first inductor and the fifth capacitor are connected in series, with one end grounded and the other end connected to the second pin of the power management chip; the thirteenth pin of the power management chip is electrically connected to the fifth capacitor; one end of the sixth capacitor is grounded and the other end is connected to the first inductor; one end of the thirteenth resistor is connected to the tenth pin of the power management chip and the other end is connected to the fourth pin of the lithium battery interface; the seventh capacitor and the eighth capacitor are connected in parallel, with one end connected to the first pin of the lithium battery interface and the other end connected to the fifth pin of the lithium battery interface.The second and third pins of the lithium battery interface are both electrically connected to the first pin of the lithium battery interface; the sixth and seventh pins of the lithium battery interface are both electrically connected to the fifth pin of the lithium battery interface; the fourteenth and fifteenth resistors are connected in series, with one end grounded and the other end electrically connected to the first pin of the lithium battery interface; one end of the sixteenth resistor is electrically connected to the fifteenth resistor, and the other end is electrically connected to the seventieth pin of the main control chip; one end of the ninth capacitor is grounded, and the other end is electrically connected to the sixteenth resistor.
[0026] In this embodiment, the power amplifier circuit includes a Bluetooth audio chip, a speaker, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-fourth capacitor, a fortieth capacitor, a forty-first capacitor, a forty-second capacitor, and a forty-third capacitor; one end of the seventeenth resistor is connected to the sixty-sixth pin of the main control chip. One end of the resistor is electrically connected to the first resistor, and the other end is electrically connected to the sixth pin of the Bluetooth audio chip. One end of the eighteenth resistor is electrically connected to the sixty-fifth pin of the main control chip, and the other end is electrically connected to the seventh pin of the Bluetooth audio chip. One end of the nineteenth resistor is electrically connected to the sixty-fourth pin of the main control chip, and the other end is electrically connected to the eighth pin of the Bluetooth audio chip. One end of the twentieth resistor is electrically connected to the second resistor, and the other end is electrically connected to the tenth pin of the Bluetooth audio chip. One end of the twentieth resistor is electrically connected to the third resistor, and the other end is electrically connected to the eleventh pin of the Bluetooth audio chip. One end of the twentieth resistor is electrically connected to the first resistor, and the other end is electrically connected to the twelfth pin of the Bluetooth audio chip. The fifth pin of the Bluetooth audio chip is grounded. One end of the tenth capacitor is electrically connected to the fifth pin of the Bluetooth audio chip, and the other end is electrically connected to the fourth pin of the Bluetooth audio chip. One end of the twentieth resistor is electrically connected to the third pin of the Bluetooth audio chip, and the other end is electrically connected to the second pin of the Bluetooth audio chip. One end of the second inductor is electrically connected to the second pin of the Bluetooth audio chip, and the other end is connected to a 3.A 3V voltage is applied. The eleventh and twelfth capacitors are connected in parallel, one end grounded and the other end connected to the second inductor. One end of the thirteenth capacitor is grounded and the other end connected to the thirteenth pin of the Bluetooth audio chip. The first pin of the Bluetooth audio chip is grounded, and the fourteenth pin is connected to the first pin of the Bluetooth audio chip. The fourteenth, fifteenth, sixteenth, and seventeenth capacitors are connected in parallel, one end grounded and the other end connected to the twenty-seventh pin of the Bluetooth audio chip. The twenty-eighth pin of the Bluetooth audio chip is connected to the fourteenth capacitor. The eighteenth, nineteenth, twentieth, and twenty-first capacitors are connected in parallel, one end grounded and the other end connected to the sixteenth pin of the Bluetooth audio chip. The fifteenth pin of the Bluetooth audio chip is connected to the eighteenth capacitor. The twenty-fourth pin of the Bluetooth audio chip is grounded, and the nineteenth pin is connected to the twenty-fourth pin of the Bluetooth audio chip. One end of the twenty-second capacitor is connected to the twenty-sixth pin of the Bluetooth audio chip, and the other end is connected to the twenty-third pin of the Bluetooth audio chip. The system has five electrical connections: one end of the 23rd capacitor is connected to the 23rd pin of the Bluetooth audio chip, and the other end is connected to the 22nd pin of the Bluetooth audio chip; the 24th resistor, 24th capacitor, 25th capacitor, and 25th resistor are connected in series, with one end connected to the 22nd capacitor and the other end connected to the 23rd pin of the Bluetooth audio chip; one end of the third inductor is connected to the 24th resistor and the other end is connected to the speaker; one end of the fourth inductor is connected to the 25th resistor and the other end is connected to the speaker; the 26th capacitor and 27th capacitor are connected in series, with one end connected to the third inductor and the other end connected to the fourth inductor; the 26th resistor, 28th capacitor, 29th capacitor, and 27th resistor are connected in series, with one end connected to the 26th capacitor and the other end connected to the 27th capacitor; one end of the 30th capacitor is connected to the 26th resistor and the other end is connected to the 27th resistor; and the 31st capacitor and 32nd capacitor are connected in series, with one end connected to the speaker and the other end connected to the speaker.
[0027] One end of the thirty-third capacitor is electrically connected to the twentieth pin of the Bluetooth audio chip, and the other end is electrically connected to the twenty-first pin of the Bluetooth audio chip. One end of the thirty-fourth capacitor is electrically connected to the eighteenth pin of the Bluetooth audio chip, and the other end is electrically connected to the seventeenth pin of the Bluetooth audio chip. The twenty-eighth resistor, the thirty-fifth capacitor, the thirty-sixth capacitor, and the twenty-ninth resistor are connected in series, with one end electrically connected to the thirty-third capacitor and the other end electrically connected to the twenty-first pin of the Bluetooth audio chip. One end of the fifth inductor is electrically connected to the twenty-eighth resistor, and the other end is electrically connected to the speaker. One end of the sixth inductor... The 29th resistor is connected to the 37th capacitor, and the other end is connected to the speaker. The 37th and 38th capacitors are connected in series, with one end connected to the 5th inductor and the other end connected to the 6th inductor. The 30th, 39th, 41st, and 31st resistors are connected in series, with one end connected to the 37th capacitor and the other end connected to the 38th capacitor. The 41st capacitor is connected to the 30th resistor at one end and the other end connected to the 31st resistor at the other end. The 42nd and 43rd capacitors are connected in series, with one end connected to the speaker and the other end connected to the speaker.
[0028] In this embodiment, the voltage regulator circuit includes a voltage regulator chip, a power interface, a seventh inductor, an eighth inductor, a ninth inductor, a forty-fourth capacitor, a forty-fifth capacitor, a forty-sixth capacitor, a forty-seventh capacitor, a forty-eighth capacitor, a forty-ninth capacitor, a fiftieth capacitor, a fifty-first capacitor, a fifty-second capacitor, a fifty-third capacitor, a fifty-fourth capacitor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, and a thirty-seventh resistor; the power interface is electrically connected to the power supply circuit, and one end of the seventh inductor and the eighth inductor are connected in parallel and electrically connected to the power interface, while the other end... The voltage regulator chip is electrically connected to its eighth pin; the common terminal of the seventh and eighth inductors is electrically connected to the twenty-seventh and sixteenth pins of the Bluetooth audio chip; the forty-fourth, forty-fifth, and forty-sixth capacitors are connected in parallel, one end of which is electrically connected to the eighth inductor, and the other end is electrically connected to the eighth pin of the voltage regulator chip; the common terminal of the forty-fourth, forty-fifth, and forty-sixth capacitors is grounded; the thirty-second and thirty-third resistors are connected in series, one end of which is grounded, and the other end is electrically connected to the forty-sixth capacitor; the thirty-fourth resistor and the forty-seventh capacitor are connected in series... One end of the capacitor is electrically connected to the eighth pin of the voltage regulator chip, and the other end is electrically connected to the thirty-third resistor; one end of the forty-eighth capacitor is electrically connected to the sixth pin of the voltage regulator chip, and the other end is electrically connected to the forty-seventh capacitor; the seventh pin of the voltage regulator chip is electrically connected to the thirty-third resistor, and the third pin of the voltage regulator chip is electrically connected to the thirty-second resistor; one end of the forty-ninth capacitor is electrically connected to the first pin of the voltage regulator chip, and the other end is electrically connected to the second pin of the voltage regulator chip; the ninth inductor, the thirty-fifth resistor, the thirty-sixth resistor, and the fiftieth capacitor are connected in series, and one end is connected to the voltage regulator chip... The second pin is electrically connected, and the other end is electrically connected to the fourth pin of the voltage regulator chip; the common terminal of the thirty-sixth resistor and the fiftieth capacitor is grounded; the fifth pin of the voltage regulator chip is electrically connected to the thirty-fifth resistor; the fifty-first capacitor and the thirty-seventh resistor are connected in series, with one end connected to the ninth inductor and the other end connected to the fifth pin of the voltage regulator chip; one end of the fifty-second capacitor is grounded, and the other end is electrically connected to the fifty-first capacitor; one end of the fifty-third capacitor is grounded, and the other end is electrically connected to the fifty-second capacitor; one end of the fifty-fourth capacitor is grounded, and the other end is electrically connected to the fifty-third capacitor.
[0029] Specifically, this application ensures efficient power transmission through an effective connection between the power input terminal and the power supply circuit. The power supply circuit stably provides the necessary power support for the entire system, guaranteeing the reliability of the device under various operating conditions. Simultaneously, the main control circuit monitors the lithium battery status in real time and dynamically adjusts the charging state based on the current battery voltage, extending battery life and improving safety and efficiency. This intelligent management allows the lithium battery to charge and discharge under optimal conditions. The close cooperation between the power amplifier circuit and the main control circuit allows for dynamic adjustment of the power amplifier circuit's output power according to actual playback needs. This approach ensures high-quality sound output while effectively avoiding unnecessary energy waste, improving the overall system's energy efficiency ratio. Through the effective integration of the above circuits, especially the application of the voltage regulator circuit, the overall size of the power supply is significantly reduced, simplifying heat dissipation. This not only helps achieve the goal of portable design but also reduces potential risks caused by overheating.
[0030] The adoption of a more compact design and the effective reduction in total power requirements have lowered production costs. Furthermore, improved energy efficiency has reduced long-term energy consumption, further enhancing the product's market competitiveness.
[0031] In summary, this application, through the optimization and integration of various aspects of the power management system, successfully solves the problems faced by traditional high-power speakers, such as large total power consumption, bulky size, heat dissipation difficulties, and high design costs, providing a more efficient, economical, and reliable solution.
[0032] This application achieves dynamic adjustment of the lithium battery charging status and the power amplifier circuit output power through the following process, thereby optimizing power management and improving speaker performance: When AC power (100~240V, 50 / 60Hz) is plugged into the power supply circuit, the 60W power supply circuit begins charging the lithium battery. The main control circuit dynamically sets the power amplifier circuit output power according to the current lithium battery voltage and charging status.
[0033] When the speaker is working normally, the main control circuit will continuously monitor the charging status and voltage status of the lithium battery to ensure the safety and stability of the system operation.
[0034] The main control circuit determines whether the AC power supply has been unplugged and plugged back in. If so, it decides whether to enter charging mode or adjust the output power of the amplifier circuit based on the lithium battery voltage and playback status.
[0035] If the battery is not currently charging, the main control circuit will detect the lithium battery voltage: if the lithium battery voltage is greater than 7.5V, the power amplifier circuit output power is set to 50W; if the lithium battery voltage is less than or equal to 7.5V, the power amplifier circuit output power is set to 30W. Power amplifier output adjustment during charging.
[0036] If the battery is currently charging, the main control circuit will further determine the lithium battery voltage: if the lithium battery voltage is less than 8V, the power amplifier circuit output power is set to 30W and charging continues; if the lithium battery voltage is greater than or equal to 8V: if the speaker is playing music, the power amplifier circuit output power is set to 50W and charging is paused; if the speaker is not playing music, the power amplifier circuit output power is set to 30W and charging continues.
[0037] The CHG_EN (charge enable), CHG_STA (charge state), and BAT_STA (lithium battery state) pins of the lithium battery charging circuit are connected to the main control circuit to adjust and detect the lithium battery charging state. The main control circuit dynamically adjusts the lithium battery charging state through the CHG_EN and CHG_STA signals.
[0038] The main control circuit detects the lithium battery voltage in real time through pin 70 VBAT_ADC of the main control chip, and dynamically adjusts the output power of the power amplifier circuit and the charging strategy according to the detection results.
[0039] The output power of the power amplifier circuit is dynamically adjusted by the main control circuit. Based on the lithium battery voltage, charging status, and playback status, the main control circuit flexibly sets the power amplifier circuit output power to 30W or 50W to meet the needs of different scenarios.
[0040] The above design allows for dynamic adjustment of the charging status based on lithium battery voltage and playback status, extending battery life and improving safety. The amplifier circuit output power can be dynamically adjusted according to actual needs, reducing energy waste while ensuring sound quality. A 60W power supply circuit achieves a total power requirement of 90W, effectively reducing power supply size and heat dissipation pressure. Intelligent management reduces power supply design costs while improving overall system reliability and user experience.
[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A power management circuit, applied to a speaker, characterized in that, It includes a power input terminal, a power supply circuit, a main control circuit for detecting lithium battery voltage, dynamically adjusting charging status, and dynamically adjusting the output power of the power amplifier circuit, a power amplifier circuit, a voltage regulator circuit, and a lithium battery charging circuit; the power input terminal is electrically connected to the input terminal of the power supply circuit, the output terminal of the power supply circuit is electrically connected to the input terminal of the lithium battery charging circuit, the output terminal of the lithium battery charging circuit is electrically connected to the main control circuit, the power amplifier circuit is electrically connected to the main control circuit, and the voltage regulator circuit is electrically connected to the power supply circuit, the power amplifier circuit, and the lithium battery charging circuit.
2. The power management circuit as described in claim 1, characterized in that, The main control circuit includes a main control chip, a first resistor, a second resistor, and a third resistor. One end of the first resistor is grounded, and the other end is electrically connected to pin 44 of the main control chip. One end of the second resistor is connected to a 3.3V voltage, and the other end is electrically connected to pin 46 of the main control chip. One end of the third resistor is electrically connected to the second resistor, and the other end is electrically connected to pin 45 of the main control chip. Pins 32, 33, and 70 of the main control chip are all electrically connected to the lithium battery charging circuit. Pins 64, 65, 66, 46, 45, and 44 of the main control chip are all electrically connected to the power amplifier circuit.
3. The power management circuit as described in claim 2, characterized in that, The lithium battery charging circuit includes a lithium battery interface, a power management chip, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, and a first inductor. A lithium battery is installed on the lithium battery interface. One end of the fourth resistor is electrically connected to the twelfth pin of the power management chip, and the other end is electrically connected to the thirty-second pin of the main control chip. The fifth and sixth resistors are connected in series, with one end... A VLDO is connected, with one end electrically connected to pin 5 of the power management chip; pin 33 of the main control chip is electrically connected to the common terminal of the fifth and sixth resistors; one end of the seventh resistor is grounded, and the other end is electrically connected to pin 33 of the main control chip; one end of the eighth resistor is grounded, and the other end is electrically connected to pin 11 of the power management chip; pin 17 of the power management chip is electrically connected to pin 18 of the power management chip; one end of the second capacitor is grounded, and the other end is electrically connected to pin 18 of the power management chip; one end of the third capacitor is grounded, and the other end is electrically connected to pin 15 of the power management chip. The ninth and tenth resistors are connected in series, with one end electrically connected to the third capacitor and the other end grounded. The tenth pin of the power management chip is electrically connected to the ninth resistor. One end of the eleventh resistor is grounded, and the other end is electrically connected to the sixteenth pin of the power management chip. One end of the twelfth resistor is grounded, and the other end is electrically connected to the seventh pin of the power management chip. The first pin of the power management chip is grounded. The twenty-first, twenty, and fourteenth pins of the power management chip are all electrically connected to the first pin of the power management chip. One end of the fourth capacitor is electrically connected to the fourth pin of the power management chip, and the other end is electrically connected to the power management chip... The third pin of the power management chip is electrically connected; the second pin of the power management chip is electrically connected to the fourth capacitor; the first inductor and the fifth capacitor are connected in series, with one end grounded and the other end connected to the second pin of the power management chip; the thirteenth pin of the power management chip is electrically connected to the fifth capacitor; one end of the sixth capacitor is grounded and the other end is connected to the first inductor; one end of the thirteenth resistor is connected to the tenth pin of the power management chip and the other end is connected to the fourth pin of the lithium battery interface; the seventh capacitor and the eighth capacitor are connected in parallel, with one end connected to the first pin of the lithium battery interface and the other end connected to the fifth pin of the lithium battery interface.The second and third pins of the lithium battery interface are both electrically connected to the first pin of the lithium battery interface; the sixth and seventh pins of the lithium battery interface are both electrically connected to the fifth pin of the lithium battery interface; the fourteenth and fifteenth resistors are connected in series, with one end grounded and the other end electrically connected to the first pin of the lithium battery interface; one end of the sixteenth resistor is electrically connected to the fifteenth resistor, and the other end is electrically connected to the seventieth pin of the main control chip; one end of the ninth capacitor is grounded, and the other end is electrically connected to the sixteenth resistor.
4. The power management circuit as described in claim 2, characterized in that, The power amplifier circuit includes a Bluetooth audio chip, a speaker, a second inductor, a third inductor, a fourth inductor, a fifth inductor, a sixth inductor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a twenty-fifth resistor, a twenty-sixth resistor, a twenty-seventh resistor, a twenty-eighth resistor, a twenty-ninth resistor, a thirtieth resistor, a thirty-first resistor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor, a fortieth capacitor, a forty-first capacitor, a forty-second capacitor, and a forty-third capacitor; one end of the seventeenth resistor is electrically connected to the sixty-sixth pin of the main control chip. One end of the resistor is connected to the sixth pin of the Bluetooth audio chip; one end of the eighteenth resistor is connected to the sixty-fifth pin of the main control chip, and the other end is connected to the seventh pin of the Bluetooth audio chip; one end of the nineteenth resistor is connected to the sixty-fourth pin of the main control chip, and the other end is connected to the eighth pin of the Bluetooth audio chip; one end of the twentieth resistor is connected to the second resistor, and the other end is connected to the tenth pin of the Bluetooth audio chip; one end of the twenty-first resistor is connected to the third resistor, and the other end is connected to the eleventh pin of the Bluetooth audio chip; one end of the twenty-second resistor is connected to the first resistor, and the other end is connected to the twelfth pin of the Bluetooth audio chip; the fifth pin of the Bluetooth audio chip is grounded; one end of the tenth capacitor is connected to the fifth pin of the Bluetooth audio chip, and the other end is connected to the fourth pin of the Bluetooth audio chip; one end of the twenty-third resistor is connected to the third pin of the Bluetooth audio chip, and the other end is connected to the second pin of the Bluetooth audio chip; one end of the second inductor is connected to the second pin of the Bluetooth audio chip, and the other end is connected to 3.A 3V voltage is applied. The eleventh and twelfth capacitors are connected in parallel, one end grounded and the other end connected to the second inductor. One end of the thirteenth capacitor is grounded and the other end connected to the thirteenth pin of the Bluetooth audio chip. The first pin of the Bluetooth audio chip is grounded, and the fourteenth pin is connected to the first pin of the Bluetooth audio chip. The fourteenth, fifteenth, sixteenth, and seventeenth capacitors are connected in parallel, one end grounded and the other end connected to the twenty-seventh pin of the Bluetooth audio chip. The twenty-eighth pin of the Bluetooth audio chip is connected to the fourteenth capacitor. The eighteenth, nineteenth, twentieth, and twenty-first capacitors are connected in parallel, one end grounded and the other end connected to the sixteenth pin of the Bluetooth audio chip. The fifteenth pin of the Bluetooth audio chip is connected to the eighteenth capacitor. The twenty-fourth pin of the Bluetooth audio chip is grounded, and the nineteenth pin is connected to the twenty-fourth pin of the Bluetooth audio chip. One end of the twenty-second capacitor is connected to the twenty-sixth pin of the Bluetooth audio chip, and the other end is connected to the twenty-third pin of the Bluetooth audio chip. The system has five electrical connections: one end of the 23rd capacitor is connected to the 23rd pin of the Bluetooth audio chip, and the other end is connected to the 22nd pin of the Bluetooth audio chip; the 24th resistor, 24th capacitor, 25th capacitor, and 25th resistor are connected in series, with one end connected to the 22nd capacitor and the other end connected to the 23rd pin of the Bluetooth audio chip; one end of the third inductor is connected to the 24th resistor and the other end is connected to the speaker; one end of the fourth inductor is connected to the 25th resistor and the other end is connected to the speaker; the 26th capacitor and 27th capacitor are connected in series, with one end connected to the third inductor and the other end connected to the fourth inductor; the 26th resistor, 28th capacitor, 29th capacitor, and 27th resistor are connected in series, with one end connected to the 26th capacitor and the other end connected to the 27th capacitor; one end of the 30th capacitor is connected to the 26th resistor and the other end is connected to the 27th resistor; and the 31st capacitor and 32nd capacitor are connected in series, with one end connected to the speaker and the other end connected to the speaker. One end of the thirty-third capacitor is electrically connected to the twentieth pin of the Bluetooth audio chip, and the other end is electrically connected to the twenty-first pin of the Bluetooth audio chip. One end of the thirty-fourth capacitor is electrically connected to the eighteenth pin of the Bluetooth audio chip, and the other end is electrically connected to the seventeenth pin of the Bluetooth audio chip. The twenty-eighth resistor, the thirty-fifth capacitor, the thirty-sixth capacitor, and the twenty-ninth resistor are connected in series, with one end electrically connected to the thirty-third capacitor and the other end electrically connected to the twenty-first pin of the Bluetooth audio chip. One end of the fifth inductor is electrically connected to the twenty-eighth resistor, and the other end is electrically connected to the speaker. One end of the sixth inductor... The 29th resistor is connected to the 37th capacitor, and the other end is connected to the speaker. The 37th and 38th capacitors are connected in series, with one end connected to the 5th inductor and the other end connected to the 6th inductor. The 30th, 39th, 41st, and 31st resistors are connected in series, with one end connected to the 37th capacitor and the other end connected to the 38th capacitor. The 41st capacitor is connected to the 30th resistor at one end and the other end connected to the 31st resistor at the other end. The 42nd and 43rd capacitors are connected in series, with one end connected to the speaker and the other end connected to the speaker.
5. The power management circuit as described in claim 4, characterized in that, The voltage regulator circuit includes a voltage regulator chip, a power interface, a seventh inductor, an eighth inductor, a ninth inductor, a forty-fourth capacitor, a forty-fifth capacitor, a forty-sixth capacitor, a forty-seventh capacitor, a forty-eighth capacitor, a forty-ninth capacitor, a fiftieth capacitor, a fifty-first capacitor, a fifty-second capacitor, a fifty-third capacitor, a fifty-fourth capacitor, a thirty-second resistor, a thirty-third resistor, a thirty-fourth resistor, a thirty-fifth resistor, a thirty-sixth resistor, and a thirty-seventh resistor. The power interface is electrically connected to the power supply circuit. One end of the seventh inductor and the eighth inductor are connected in parallel and electrically connected to the power interface, while the other end is connected to the voltage regulator. The eighth pin of the chip is electrically connected; the common terminal of the seventh and eighth inductors is electrically connected to the twenty-seventh and sixteenth pins of the Bluetooth audio chip; the forty-fourth, forty-fifth, and forty-sixth capacitors are connected in parallel, one end of which is electrically connected to the eighth inductor, and the other end of which is electrically connected to the eighth pin of the voltage regulator chip; the common terminal of the forty-fourth, forty-fifth, and forty-sixth capacitors is grounded; the thirty-second and thirty-third resistors are connected in series, one end of which is grounded, and the other end of which is electrically connected to the forty-sixth capacitor; the thirty-fourth resistor and the forty-seventh capacitor are connected in series, one end of which is grounded, and the other end of which is electrically connected to the eighth pin of the voltage regulator chip. The eighth pin of the voltage regulator chip is electrically connected, and the other end is electrically connected to the thirty-third resistor; one end of the forty-eighth capacitor is electrically connected to the sixth pin of the voltage regulator chip, and the other end is electrically connected to the forty-seventh capacitor; the seventh pin of the voltage regulator chip is electrically connected to the thirty-third resistor; the third pin of the voltage regulator chip is electrically connected to the thirty-second resistor; one end of the forty-ninth capacitor is electrically connected to the first pin of the voltage regulator chip, and the other end is electrically connected to the second pin of the voltage regulator chip; the ninth inductor, the thirty-fifth resistor, the thirty-sixth resistor, and the fiftieth capacitor are connected in series, and one end is connected to the second pin of the voltage regulator chip. One end of the capacitor is electrically connected to the other end, and the other end is electrically connected to the fourth pin of the voltage regulator chip; the common terminal of the thirty-sixth resistor and the fiftieth capacitor is grounded; the fifth pin of the voltage regulator chip is electrically connected to the thirty-fifth resistor; the fifty-first capacitor and the thirty-seventh resistor are connected in series, one end of which is electrically connected to the ninth inductor, and the other end is electrically connected to the fifth pin of the voltage regulator chip; one end of the fifty-second capacitor is grounded, and the other end is electrically connected to the fifty-first capacitor; one end of the fifty-third capacitor is grounded, and the other end is electrically connected to the fifty-second capacitor; one end of the fifty-fourth capacitor is grounded, and the other end is electrically connected to the fifty-third capacitor.