Portable speaker product eco power saving mode design circuit

Abstract

The utility model discloses a portable sound box product ECO power saving mode design circuit, including main chip module, MOS tube power control circuit, sound box power amplifier chip module and power module, and the input of main chip module is connected with the output of preset ECO mode button, the output of main chip module is connected with the control pin of MOS tube power control circuit, the input pin of sound box power amplifier chip module is connected with the output of main chip module, power boost and buck module is connected with MOS tube power control circuit, MOS tube power control circuit is connected with sound box function module, and when normal working mode, through MOS tube power control circuit control is the sound box function module and provides rated voltage, when ECO power saving mode, through MOS tube power control circuit control stops for sound box function module power supply. Solveed the current ECO power saving mode solution cannot satisfy the product sound effect output normal situation, the problem of more than 28 hours of long endurance time specification requirement of customer request.

Description

Technical Field

[0001] This utility model relates to the technical field of small household appliances such as portable speakers, and in particular to a design circuit for an ECO power-saving mode of a portable speaker product. Background Technology

[0002] There are already various ECO power-saving mode solutions available for portable speaker products.

[0003] However, the existing ECO power-saving mode solutions for portable speaker products have limited power savings compared to normal usage mode, and they have a significant impact on the product's output sound quality (such as lower output volume and worse audio performance). They cannot meet the customer's requirement for an ultra-long battery life of more than 28 hours when the product's sound output is normal. Summary of the Invention

[0004] This invention provides a portable speaker product ECO power-saving mode design circuit to overcome the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A portable speaker product ECO power-saving mode design circuit includes a main chip module, a MOSFET power control circuit, a speaker amplifier chip module, a speaker function module, and a power module; and the speaker function module includes a light strip and indicator light function module.

[0007] Furthermore, one end of the main chip module is connected to the preset ECO mode button; the other end of the main chip module is connected to the control pin of the MOS transistor power control circuit; and the other end of the main chip module is also connected to the speaker amplifier chip module.

[0008] The power supply module includes an output power supply, a power buck-boost module, and a power boost module; the output power supply is connected to the power buck-boost module and the power boost module respectively; the power boost module is connected to the speaker amplifier chip module and is used to provide the voltage to drive and amplify the audio signal output by the speaker amplifier chip module.

[0009] The power boost / buck module is connected to the input pin of the MOSFET power control circuit. The power boost / buck module is connected to the main chip module and the speaker amplifier chip module respectively, and is used to supply power to the I2C / I2S interfaces of the main chip module and the speaker amplifier chip module in normal operation mode or ECO power saving mode. The output pin of the MOSFET power control circuit is connected to the speaker function module. In normal operation mode, the MOSFET power control circuit controls the supply of rated voltage to the speaker function module. In ECO power saving mode, the MOSFET power control circuit controls the cessation of power supply to the speaker function module.

[0010] Furthermore, the MOSFET power supply control circuit includes MOSFET D4 and transistor Q1;

[0011] Pin 1 of MOSFET D4, pin 2 of MOSFET D4, pin 3 of MOSFET D4, one end of the first capacitor C1, one end of the first resistor R6, and one end of the third capacitor C7 are connected to the +3.3V pin of the main chip module or the speaker amplifier chip module, and the other end of the first capacitor C1 is grounded.

[0012] Pin 4 of the MOS transistor D4 is connected to the other end of the first resistor R6, the other end of the third capacitor C7, and one end of the second resistor R12. The other end of the second resistor R12 is connected to the collector of the transistor Q1. The base of the transistor Q1 is connected to one end of the fourth capacitor C12, one end of the fifth capacitor C116, one end of the fourth resistor R68, and one end of the third resistor R13. The emitter of the transistor Q1 is connected to the other end of the fourth capacitor C12, the other end of the fifth capacitor C116, and the other end of the fourth resistor R68 and grounded. The other end of the third resistor R13 is connected to the control pin POWER CTRL.

[0013] Pins 5, 6, 7, and 8 of MOSFET D4, and one end of the second capacitor C6 are connected to the +3.3V_LED pin of the functional module, and the other end of the second capacitor C6 is grounded.

[0014] Furthermore, the MOSFET D4 is an LT4201L;

[0015] The transistor Q1 is a 3904.

[0016] Furthermore, the speaker amplifier chip module uses the TAS5825M;

[0017] The output power supply uses a lithium battery;

[0018] The power supply buck-boost module uses a CS5517T chip;

[0019] The power boost module uses an SCT12A0 chip;

[0020] The main chip module includes, but is not limited to, AU7843 or STM32 series chips.

[0021] Furthermore, the input terminal of the main chip module is connected to the output terminal of the preset ECO mode button via a GPIO interface; the output terminal of the main chip module is connected to the control pin of the MOS transistor power control circuit via a GPIO interface; and the output terminal of the main chip module is connected to the input pin of the speaker amplifier chip module via an I2C / I2S interface.

[0022] Beneficial Effects: This utility model provides a portable speaker product ECO power-saving mode design circuit. By setting up a main chip module, a MOSFET power control circuit, and a speaker amplifier chip module, the main chip module can control the working mode of the speaker amplifier chip module to reduce the power consumption of the amplifier chip in ECO mode. At the same time, the added MOSFET power control circuit can control the power module through the main chip module to shut down the power supply of unnecessary functional modules in ECO mode. In addition, the power chip in the power module is selected with low quiescent current and high conversion efficiency, which can greatly reduce the power consumption in ECO mode while ensuring the output sound quality of the portable speaker. Thus, it achieves the user's requirement of ultra-long battery life while meeting the product's sound output requirements. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 The circuit diagram of the MOS transistor power control circuit in the ECO power saving mode design circuit of the portable speaker product of this utility model;

[0025] Figure 2 This is a partial circuit block diagram of the main chip module and the speaker amplifier chip module of this utility model;

[0026] Figure 3 This is a schematic diagram of the power supply for the MOS transistor power control circuit and power module of this utility model. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] This embodiment provides a portable speaker product ECO power-saving mode design circuit, including a main chip module, a MOSFET power control circuit, a speaker amplifier chip module, a speaker function module, and a power module. The speaker function module includes LED strip and indicator light function modules. The chip model of the main chip module includes, but is not limited to, AU7843 or STM32 series chips. For example, the STM32 series chips are a series of 32-bit ARM Cortex-M microcontrollers manufactured by STMicroelectronics. In portable speakers, the STM32 series chips can serve as the main control chip, responsible for the overall management and command control of the portable speaker product system.

[0029] Specifically, such as Figure 1 As shown, the MOSFET power supply control circuit includes a MOSFET D4 and a transistor Q1; the MOSFET D4 is an LT4201L; the transistor Q1 is a 3904.

[0030] Pin 1 of MOSFET D4, pin 2 of MOSFET D4, pin 3 of MOSFET D4, one end of the first capacitor C1, one end of the first resistor R6, and one end of the third capacitor C7 are connected to the +3.3V pin of the main chip module or the speaker amplifier chip module, and the other end of the first capacitor C1 is grounded.

[0031] Pin 4 of the MOS transistor D4 is connected to the other end of the first resistor R6, the other end of the third capacitor C7, and one end of the second resistor R12. The other end of the second resistor R12 is connected to the collector of the transistor Q1. The base of the transistor Q1 is connected to one end of the fourth capacitor C12, one end of the fifth capacitor C116, one end of the fourth resistor R68, and one end of the third resistor R13. The emitter of the transistor Q1 is connected to the other end of the fourth capacitor C12, the other end of the fifth capacitor C116, and the other end of the fourth resistor R68 and grounded. The other end of the third resistor R13 is connected to the control pin POWER CTRL.

[0032] Pin 5, pin 6, pin 7, pin 8 of MOSFET D4 and one end of the second capacitor C6 are connected to the +3.3V_LED pin of the functional module, and the other end of the second capacitor C6 is grounded.

[0033] like Figures 2 to 3 As shown, the input terminal of the main chip module is connected to the output terminal of the preset ECO mode button through the GPIO interface; the output terminal of the main chip module is connected to the control pin of the MOS transistor power control circuit through the GPIO interface; the output terminal of the main chip module is also connected to the input pin of the speaker amplifier chip module through the I2C interface / I2S interface.

[0034] The power module includes an output power supply, a power buck-boost module, and a power boost module; the output power supply uses a lithium battery and has an output voltage of 2.7V-4.2V; the output power supply is connected to the power buck-boost module and the power boost module respectively; the power boost module is connected to the speaker amplifier chip module, which provides the voltage to drive and amplify the audio signal output by the speaker amplifier chip module.

[0035] The power boost / buck module is connected to the input pin of the MOSFET power control circuit. The power boost / buck module is connected to both the main chip module and the speaker amplifier chip module, providing power to the I2C / I2S interfaces of both modules in normal operation or ECO power-saving mode. The output pin of the MOSFET power control circuit is connected to the speaker module. In normal operation, the MOSFET power control circuit provides the rated voltage to the speaker module; in ECO power-saving mode, it stops supplying power to the speaker module. The LED strip and indicator light circuits in the LED strip and indicator light modules described in this embodiment are implemented using existing known technologies, and their specific circuit principles and structures will not be elaborated upon here.

[0036] In a specific embodiment, the speaker amplifier chip module adopts TAS5825M;

[0037] Specifically, the power amplifier chip selected is the Class D power amplifier TAS5825M, which is controlled by the main chip module. In applications where the Class D power amplifier chip uses an external LC filter, the output current formula is as follows:

[0038] I = duty·P VCC / (2·f S ·L)

[0039] In the formula: duty represents the duty cycle of the PWM output signal of the power amplifier chip; P VCC Indicates the power amplifier chip supply voltage; f S The frequency of the power amplifier chip is represented by ; L represents the inductance value of the preset external LC filter; in this embodiment, to reduce the power consumption of the power amplifier chip, and considering the product's rated audio output power specifications and product cost, the TAS5825M power amplifier chip was ultimately selected, and the hardware-set power supply voltage P... VCC The voltage is 9V, and the inductance value L is 10uH; the switching frequency f is configured by software. SThe frequency is 768kHz. In this embodiment, regarding the duty cycle of the PWM output signal of the power amplifier chip, a lower duty cycle results in a smaller output current and lower power consumption. During normal operation, the duty cycle remains fixed regardless of the input signal level. This leads to reduced output power at low duty cycles, but a deterioration in THD+N performance when high-level input signals (i.e., high output power) are present. To address this issue, this embodiment uses the TAS5825M chip, which supports a dynamic duty cycle adjustment mode. In this mode, the power amplifier chip monitors the input signal level in real time and dynamically adjusts the output duty cycle accordingly. For example, when the input level is high, the output duty cycle is 50%; when the input level is low, the output duty cycle gradually decreases. This reduces the power consumption of the power amplifier chip and prevents a deterioration in THD+N performance when high-level input signals are present. Meanwhile, in this embodiment, under ECO mode, after the main chip module sets the working mode of the TAS5825M power amplifier chip to a dynamically adjusted duty cycle working mode through the I2C interface, the power consumption of the power amplifier chip is reduced by approximately 39% in actual testing.

[0040] In a specific embodiment, the power supply buck-boost module uses a CS5517T chip, and the power boost module uses an SCT12A0 chip. Specifically, the power supply chip is selected for its low quiescent current and high conversion efficiency. In this embodiment, to reduce the product's power consumption, the selection of the power supply chip requires careful consideration of both quiescent current and conversion efficiency. Considering the actual application requirements and cost of the portable speaker product, the power boost chip SCT12A0 and the buck-boost chip CS5517T, both with low quiescent current and high conversion efficiency, are ultimately selected. The specifications of the boost chip SCT12A0 include: quiescent current: 120uA, conversion efficiency: 93%, and maximum output current: 12A. The specifications of the buck-boost chip CS5517T include: quiescent current: 8uA, conversion efficiency: 95%, and maximum output current: 0.6A.

[0041] In a specific embodiment, to save power consumption in ECO mode, the portable speaker product can disable the LED strip and indicator light functions in ECO mode via a MOSFET power control circuit. For example... Figure 2The power supply circuit diagram for this product shows that the +3.3V power supply powers the main chip, power amplifier chip, and other functional modules that require normal operation in both normal and ECO modes. The +3.3V LED power supply powers the LED strip and indicator lights, which require power in normal mode but not in ECO mode. In normal mode, the main chip's power control pin POWER_CTRL in the ECO power-saving mode circuit outputs a high level, controlling transistor Q1 and MOSFET D4 to conduct, resulting in a simultaneous +3.3V power supply and +3.3V LED power supply outputting 3.3V, allowing all functional modules to operate normally. In ECO mode, the main chip's power control pin POWER_CTRL outputs a low level, controlling transistor Q1 and MOSFET D4 to cut off. In this mode, the +3.3V power supply outputs 3.3V, and the +3.3V LED has no power output, effectively shutting down the LED strip and indicator lights. In this embodiment, in order to save power consumption in ECO mode, the power supply to the LED strip and indicator light functional modules can be indirectly controlled by the MOS transistor power control circuit in ECO power saving mode. That is, in ECO mode, there is a functional module that can turn off the LED strip and indicator light.

[0042] This utility model includes a main chip module, a MOSFET power control circuit, and a speaker amplifier chip module, comprising:

[0043] 1. Select the appropriate power amplifier chip and control its operating mode through the main chip to reduce the power consumption of the power amplifier chip in ECO mode;

[0044] 2. Add a power control circuit. In ECO mode, the main chip controls the power control circuit to shut down the power supply to unnecessary functional modules in ECO mode.

[0045] 3. The power chip is selected with low quiescent current and high conversion efficiency; by combining the hardware in the above three ways, the product's sound output is normal while meeting the customer's requirement for an ultra-long battery life of more than 28 hours.

[0046] The portable speaker product ECO power-saving mode design circuit described in this embodiment can control the working mode of the speaker amplifier chip module through the main chip module, and reduce the power consumption of the amplifier chip in ECO mode through the MOSFET power control circuit. At the same time, the added MOSFET power control circuit can control the power module through the main chip module to shut down the power supply of unnecessary functional modules in ECO mode. In addition, the power chip in the power module is selected with low quiescent current and high conversion efficiency, which can greatly reduce the power consumption in ECO mode while ensuring the output sound quality of the portable speaker. Thus, it can meet the user's requirement of a super long battery life of more than 28 hours while meeting the product's normal sound output requirements.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A portable speaker product's ECO power-saving mode design circuit, characterized in that, It includes a main chip module, a MOSFET power control circuit, a speaker amplifier chip module, a speaker function module, and a power module; and the speaker function module includes LED strip and indicator light function modules. Furthermore, one end of the main chip module is connected to the preset ECO mode button; the other end of the main chip module is connected to the control pin of the MOS transistor power control circuit; and the other end of the main chip module is also connected to the speaker amplifier chip module. The power supply module includes an output power supply, a power buck-boost module, and a power boost module; the output power supply is connected to the power buck-boost module and the power boost module respectively; the power boost module is connected to the speaker amplifier chip module and is used to provide the voltage to drive and amplify the audio signal output by the speaker amplifier chip module. The power boost / buck module is connected to the input pin of the MOSFET power control circuit. The power boost / buck module is connected to both the main chip module and the speaker amplifier chip module, and is used to supply power to the I2C / I2S interface of the speaker amplifier chip module and the main chip module in normal operation mode or ECO power saving mode. The output pin of the MOSFET power control circuit is connected to the speaker function module. In normal operation mode, the MOSFET power control circuit controls the supply of rated voltage to the speaker function module. In ECO power saving mode, the MOSFET power control circuit controls the cessation of power supply to the speaker function module.

2. The portable speaker product ECO power-saving mode design circuit according to claim 1, characterized in that, The MOSFET power supply control circuit includes MOSFET D4 and transistor Q1; Pin 1, pin 2, pin 3 of MOSFET D4, one end of the first capacitor C1, one end of the first resistor R6, and one end of the third capacitor C7 are connected to the +3.3V pin of the speaker amplifier chip module or the main chip module, and the other end of the first capacitor C1 is grounded. Pin 4 of the MOS transistor D4 is connected to the other end of the first resistor R6, the other end of the third capacitor C7, and one end of the second resistor R12. The other end of the second resistor R12 is connected to the collector of the transistor Q1. The base of the transistor Q1 is connected to one end of the fourth capacitor C12, one end of the fifth capacitor C116, one end of the fourth resistor R68, and one end of the third resistor R13. The emitter of the transistor Q1 is connected to the other end of the fourth capacitor C12, the other end of the fifth capacitor C116, and the other end of the fourth resistor R68 and grounded. The other end of the third resistor R13 is connected to the control pin POWER CTRL. Pins 5, 6, 7, and 8 of MOSFET D4, and one end of the second capacitor C6 are connected to the +3.3V_LED pin of the speaker function module, and the other end of the second capacitor C6 is grounded.

3. The portable speaker product ECO power-saving mode design circuit according to claim 2, characterized in that, The MOSFET D4 is an LT4201L; The transistor Q1 is a 3904.

4. The portable speaker product ECO power-saving mode design circuit according to claim 1, characterized in that, The speaker amplifier chip module uses TAS5825M; The output power supply uses a lithium battery; The power supply buck-boost module uses a CS5517T chip; The power boost module uses an SCT12A0 chip; The main chip module includes, but is not limited to, AU7843 or STM32 series chips.

5. The portable speaker product ECO power-saving mode design circuit according to claim 1, characterized in that, The input terminal of the main chip module is connected to the output terminal of the preset ECO mode button via a GPIO interface; the output terminal of the main chip module is connected to the control pin of the MOS transistor power control circuit via a GPIO interface; and the output terminal of the main chip module is connected to the input pin of the speaker amplifier chip module via an I2C / I2S interface.

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