WO2023169470A1 - 临界值振荡控制装置、设备及无线耳机 - Google Patents

临界值振荡控制装置、设备及无线耳机 Download PDF

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Publication number
WO2023169470A1
WO2023169470A1 PCT/CN2023/080306 CN2023080306W WO2023169470A1 WO 2023169470 A1 WO2023169470 A1 WO 2023169470A1 CN 2023080306 W CN2023080306 W CN 2023080306W WO 2023169470 A1 WO2023169470 A1 WO 2023169470A1
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Prior art keywords
input port
value
control module
logic
resistor
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PCT/CN2023/080306
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English (en)
French (fr)
Inventor
杨铭
张亮
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深圳英集芯科技股份有限公司
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Publication of WO2023169470A1 publication Critical patent/WO2023169470A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones

Definitions

  • the present application relates to the field of circuit structure technology, and specifically to a critical value oscillation control device, equipment and wireless earphones.
  • wireless Bluetooth headsets are small in size and low in power, their operating current and charging current will be smaller than those of many consumer electronics products. Because wireless Bluetooth headsets are applications with low current, the requirements for current ripple are getting higher and higher. Especially when the headset charging current is as low as the critical point of the current value for switching to low-power mode, the judgment threshold when making mode judgment will be Fluctuations occur, causing the output voltage to form oscillation ripples, resulting in lower stability.
  • Embodiments of the present application provide a critical value oscillation control device, equipment and wireless earphones, which can improve the accuracy of determining the overvoltage judgment threshold, thereby reducing the formation of oscillation ripples and improving stability.
  • the first aspect of the embodiment of the present application provides a critical value oscillation control device.
  • the control device includes: a first operational amplifier, a second operational amplifier, a comparator, a logic control module, a DCDC controller, a timing module and a logic processing module, where,
  • the input port of the first operational amplifier is connected to the input port of the second operational amplifier, the output port of the first operational amplifier is connected to the first input port of the comparator, and the second operational amplifier
  • the output port of the comparator is connected to the second input port of the comparator.
  • the output port of the comparator is connected to the first input port of the logic control module.
  • the output port of the logic control module is connected to the DCDC control module.
  • the input port of the controller is connected to the input port of the timing module, and the output port of the DCDC controller is connected to the second input port of the logic control module and the first input port of the logic processing module.
  • the output port of the timing module is connected to the second input port of the logic processing module, and the output port of the logic processing module is connected to the third input port of the logic control module;
  • the logic control module is used to determine the value of the mode conversion indication signal according to the working mode of the first operation cycle, and the mode conversion indication signal is the output signal of the DCDC controller;
  • the logic control module is configured to determine the overvoltage judgment threshold of the second operating cycle based on the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module, and the second operating cycle is the the period after the first operating period;
  • the comparator is used to make an overvoltage judgment in the second operating cycle according to the overvoltage judgment threshold.
  • control device further includes: a first resistor and a second resistor, wherein the second end of the first resistor and the first end of the second resistor, the The input port of the first operational amplifier, so The input port of the second operational amplifier is connected, the second end of the second resistor is connected to ground, and the first end of the first resistor is a signal input port.
  • the logic control module is configured to determine the overvoltage judgment of the second operating cycle based on the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module. Thresholds, including:
  • the logic control module is configured to perform an OR operation based on the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module to obtain the operation result;
  • the logic control module is configured to determine the overvoltage judgment threshold of the second operating cycle based on the operation result.
  • the logic control module is configured to determine the value of the mode conversion indication signal according to the working mode of the first operating cycle, including:
  • the logic control module is configured to determine the value of the mode conversion indication signal as the first value if the working mode of the first operating cycle is the PWM working mode;
  • the value of the mode conversion indication signal is determined as the second value.
  • control device further includes: a filter module, the filter module includes a third resistor and a first capacitor, the first end of the third resistor is connected to the first operational amplifier
  • the input port of the first capacitor is connected to the first end of the first capacitor
  • the second end of the third resistor is connected to the second end of the first resistor, the first end of the second resistor, and the first end of the first capacitor.
  • the second terminal of the capacitor is connected.
  • a second aspect of the embodiments of the present application provides a critical value oscillation control device.
  • the control device includes a circuit board and the critical value oscillation control device described in any one of the first aspects.
  • a third aspect of the embodiments of the present application provides a wireless earphone, which includes a housing and a critical value oscillation control device as described in the second aspect.
  • the critical value oscillation control device includes a first operational amplifier, a second operational amplifier, a comparator, a logic control module, a DCDC controller, a timing module and a logic processing module, wherein the input port of the first operational amplifier is connected to the second operational amplifier.
  • the input port of the operational amplifier is connected, the output port of the first operational amplifier is connected to the first input port of the comparator, and the output port of the second operational amplifier is connected to the second input port of the comparator.
  • the output port of the comparator is connected to the first input port of the logic control module
  • the output port of the logic control module is connected to the input port of the DCDC controller and the input port of the timing module
  • the output port of the DCDC controller is connected to the second input port of the logic control module and the first input port of the logic processing module
  • the output port of the timing module is connected to the second input port of the logic processing module.
  • the input port is connected, and the output port of the logic processing module is connected with the third input port of the logic control module.
  • the logic control module is used to determine the value of the mode conversion indication signal according to the working mode of the first operating cycle.
  • the mode conversion indication signal is the output signal of the DCDC controller
  • the logic control module is used to determine the second value according to the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module.
  • the overvoltage judgment threshold of the operating period, the second operating period is the period after the first operating period, and the comparator is used to perform overvoltage judgment in the second operating period according to the overvoltage judgment threshold, Therefore, overvoltage judgment can be made based on the value of the mode conversion indication signal, the type of load current, and the overvoltage judgment threshold determined by the output signal of the logic processing module, thereby improving the accuracy of overvoltage judgment and reducing oscillation.
  • the formation of ripples improves stability.
  • Figure 1 is a schematic structural diagram of a critical value oscillation control device provided by an embodiment of the present application.
  • Figure 2 is a schematic structural diagram of another critical value oscillation control device provided by an embodiment of the present application.
  • Figure 3 provides a basic logic schematic diagram of a logic control module according to an embodiment of the present application
  • Figure 4 is an output waveform diagram at critical current provided by an embodiment of the present application.
  • Figure 5 provides a critical current and output waveform under heavy load according to an embodiment of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
  • FIG. 1 is a schematic structural diagram of a critical value oscillation control device according to an embodiment of the present application.
  • the control device includes: a first operational amplifier 1, a second operational amplifier 2, a comparator 3, a logic control module 4, a DCDC controller 5, a timing module 6 and a logic processing module 7, where,
  • the input port of the first operational amplifier 1 is connected to the input port of the second operational amplifier 2, and the output port of the first operational amplifier 1 is connected to the first input port of the comparator 3.
  • the output port of the second operational amplifier 2 is connected to the second input port of the comparator 3, and the output port of the comparator 3 is connected to the first input port of the logic control module 4.
  • the logic control module The output port of 4 is connected to the input port of the DCDC controller 5 and the input port of the timing module 6, and the output port of the DCDC controller 5 is connected to the second input port of the logic control module 4 and the input port of the timing module 6.
  • the first input port of the logical processing module 7 is connected, the output port of the timing module 6 is connected to the second input port of the logical processing module 7, and the output port of the logical processing module 7 is connected to the logical control module. Connected to the third input port of 4;
  • the logic control module 4 is used to determine the value of the mode conversion indication signal according to the working mode of the first operation cycle, and the mode conversion indication signal is the output signal of the DCDC controller 5;
  • the logic control module 4 is used to determine the overvoltage judgment threshold of the second operation cycle according to the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module 7.
  • the second operation period is the cycle following the first operating cycle;
  • the comparator 3 is used to make an overvoltage judgment in the second operating cycle according to the overvoltage judgment threshold.
  • the critical value oscillation control device further includes: a first resistor R1 and a second resistor R2, wherein the second end of the first resistor R1 is connected to the second resistor R2.
  • the first end of R2, the input port of the first operational amplifier 1, and the input port of the second operational amplifier 2 are connected, the second end of the second resistor R2 is connected to ground, and the third end of the first resistor R1 One end is the signal input port.
  • the logic control module 4 is configured to determine the overvoltage judgment threshold of the second operating cycle based on the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module 7 ,include:
  • the logic control module 4 is used to perform an OR operation based on the value of the mode conversion indication signal, the type of load current, and the output signal of the logic processing module 7 to obtain the operation result;
  • the logic control module 4 is configured to determine the overvoltage judgment threshold of the second operating cycle based on the operation result.
  • the logical value of the mode conversion indication signal may be 0 or 1.
  • the type of load current is associated with the low-power signal. If the type of load current is a low-power load current, the logic value of the low-power signal is 1. If the type of load current is a non-low-power load current, then the logic value is low.
  • the power consumption signal has a logic value of 0.
  • the operation result includes 0 or 1. If the operation result is 1, the overvoltage judgment threshold of the second operating cycle is the low power consumption judgment threshold. If the operation result is 0, the overvoltage judgment threshold in the second operating cycle is not the low power consumption judgment threshold.
  • the difference between the low power consumption judgment threshold and the non-low power consumption judgment threshold is usually large. Therefore, it can reduce the occurrence of overvoltage judgment using the low power consumption judgment threshold and the non-low power consumption judgment threshold alternately, thereby reducing the number of overvoltage judgments.
  • the PSM signal shown in Figure 1 is a low power consumption indication signal. If the logic value of the PSM signal is 1, it indicates that it is in a low power consumption mode.
  • the logic control module 4 is configured to determine the value of the mode conversion indication signal according to the working mode of the first operating cycle, including:
  • the logic control module 4 is configured to, if the working mode of the first operating cycle is the PWM working mode, determine the value of the mode conversion indication signal as the first value;
  • the value of the mode conversion indication signal is determined as the second value.
  • the control device further includes: a filter module, the filter module includes a third resistor R3 and a first capacitor C1, the first end of the third resistor R3 is connected to the first capacitor C1.
  • the input port of the first operational amplifier 1 is connected to the first end of the first capacitor C1, and the second end of the third resistor R3 is connected to the second end of the first resistor R1 and the second resistor R2.
  • the first end of the first capacitor C1 is connected to the second end of the first capacitor C1.
  • FIG. 3 also provides a basic logic schematic diagram of a logic control module.
  • the Comp signal is the output signal of the comparator
  • the PSM signal is the indication signal of the PSM working mode
  • the PLO signal is the mode conversion indication signal.
  • the DCDC output overvoltage is judged by the Comp comparison circuit, and the overvoltage value is determined by the working mode judged in the previous cycle.
  • the overvoltage signal issued by the Comp comparison circuit is first sent to the added logic control module.
  • the logic control module will actively shield the first overvoltage signal sent and determine whether it is currently in PSM mode. When both conditions are met at the same time, the overvoltage signal will be sent to the DCDC Controller and the low-power controller at the same time.
  • Time consumption module Low Power Timer
  • the DCDC controller will control the shutdown of the power tube according to the received overvoltage signal.
  • the low-power timing module will start the low-power judgment timing based on the received overvoltage signal. After the timer expires, the PLOUT low-power signal will be set.
  • the internal signal PLO is the mode indication signal for the current sampling circuit to determine the conversion from PWM to PSM in PWM mode.
  • the default light load PLO 1.
  • Figure 4 shows an output waveform diagram at a critical current.
  • stage 1 it is in PWM operating mode, but the first overvoltage is shielded, that is, the PLOUT result of stage 1 is not looked at.
  • the present application also provides a critical value oscillation control device, which control device includes a circuit board and the critical value oscillation control device as described in any of the preceding embodiments.
  • the present application also provides a wireless earphone, which includes a housing and a critical value oscillation control device as described in the previous embodiment.
  • the disclosed device can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or may be Integrated into another system, or some features can be ignored, or not implemented.
  • the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.
  • the above integrated units can be implemented in the form of hardware or software program modules.
  • the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can Stored in a computer-readable memory.
  • the technical solution of the present application is essentially or contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory, It includes several instructions to cause a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application.
  • the aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.
  • the program can be stored in a computer-readable memory.
  • the memory can include: a flash disk. , read-only memory, random access device, magnetic disk or optical disk, etc.

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  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
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Abstract

本申请实施例提供一种临界值振荡控制装置、设备及无线耳机，其特征在于，控制装置包括：第一运算放大器、第二运算放大器、比较器、逻辑控制模块、DCDC控制器、计时模块和逻辑处理模块，逻辑控制模块用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，模式转换指示信号为DCDC控制器的输出信号；逻辑控制模块用于根据模式转换指示信号的数值、负载电流的类型、逻辑处理模块的输出信号确定第二运行周期的过压判断阈值，第二运行周期为第一运行周期之后的周期；比较器用于根据过压判断阈值在第二运行周期内进行过压判断，能够提升过压判断阈值确定的准确定，从而减少了振荡纹波的形成，提升了稳定性。

Description

临界值振荡控制装置、设备及无线耳机
本申请要求于2022年03月08日提交中国专利局、申请号为202210219003.9、申请名称为“临界值振荡控制装置、设备及无线耳机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电路结构技术领域，具体涉及一种临界值振荡控制装置、设备及无线耳机。
背景技术
近年来，智能手机技术快速发展，随着手机在轻薄化的要求上越来越高，很多旗舰手机都相继取消了3.5mm的耳机孔。因此，无线蓝牙耳机的需求也越来越大，而无线蓝牙耳机由于体积小功率小，所以其工作电流、充电电流也会比很多消费类电子产品小。无线蓝牙耳机由于是电流小的应用对电流纹波的要求越来越高，特别是在耳机充电电流低至转低功耗模式的电流值临界点附近时，在进行模式判断时的判断阈值会出现波动，导致了输出电压形成振荡纹波，导致了稳定性较低。
发明内容
本申请实施例提供一种临界值振荡控制装置、设备及无线耳机，能够提升过压判断阈值确定的准确定，从而减少了振荡纹波的形成，提升了稳定性。
本申请实施例的第一方面提供了一种临界值振荡控制装置，所述控制装置包括：第一运算放大器、第二运算放大器、比较器、逻辑控制模块、DCDC控制器、计时模块和逻辑处理模块，其中，
所述第一运算放大器的输入端口与所述第二运算放大器的输入端口相连接，所述第一运算放大器的输出端口与所述比较器的第一输入端口相连接，所述第二运算放大器的输出端口与所述比较器的第二输入端口相连接，所述比较器的输出端口与所述逻辑控制模块的第一输入端口相连接，所述逻辑控制模块的输出端口与所述DCDC控制器的输入端口、所述计时模块的输入端口相连接，所述DCDC控制器的输出端口与所述逻辑控制模块的第二输入端口、所述逻辑处理模块的第一输入端口相连接，所述计时模块的输出端口与所述逻辑处理模块的第二输入端口相连接，所述逻辑处理模块的输出端口与所述逻辑控制模块的第三输入端口相连接；
所述逻辑控制模块用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，所述模式转换指示信号为所述DCDC控制器的输出信号；
所述逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号确定第二运行周期的过压判断阈值，所述第二运行周期为所述第一运行周期之后的周期；
所述比较器用于根据所述过压判断阈值在所述第二运行周期内进行过压判断。
结合第一方面，在一个可能的实现方式中，控制装置还包括：第一电阻和第二电阻，其中，所述第一电阻的第二端与所述第二电阻的第一端、所述第一运算放大器的输入端口、所 述第二运算放大器的输入端口相连接，所述第二电阻的第二端接地，所述第一电阻的第一端为信号输入端口。
结合第一方面，在一个可能的实现方式中，逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号确定第二运行周期的过压判断阈值，包括：
所述逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号进行或运算，以得到运算结果；
所述逻辑控制模块用于根据所述运算结果，确定所述第二运行周期的过压判断阈值。
结合第一方面，在一个可能的实现方式中，所述逻辑控制模块用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，包括：
所述逻辑控制模块用于，若所述第一运行周期的工作模式为PWM工作模式，则将所述模式转换指示信号的数值确定为第一数值；
若所述第一运行周期的工作模式为PSM工作模式，则将所述模式转换指示信号的数值确定为第二数值。
结合第一方面，在一个可能的实现方式中，控制装置还包括：滤波模块，所述滤波模块包括第三电阻和第一电容，所述第三电阻的第一端与所述第一运算放大器的输入端口、所述第一电容的第一端相连接，所述第三电阻的第二端与所述第一电阻的第二端、所述第二电阻的第一端、所述第一电容的第二端相连接。
本申请实施例的第二方面提供了一种临界值振荡控制设备，所述控制设备包括电路板和第一方面中任一项所述的临界值振荡控制装置。
本申请实施例的第三方面提供一种无线耳机，所述无线耳机包括壳体和如第二方面中所述的临界值振荡控制设备。
实施本申请实施例，至少具有如下有益效果：
临界值振荡控制装置包括第一运算放大器、第二运算放大器、比较器、逻辑控制模块、DCDC控制器、计时模块和逻辑处理模块，其中，所述第一运算放大器的输入端口与所述第二运算放大器的输入端口相连接，所述第一运算放大器的输出端口与所述比较器的第一输入端口相连接，所述第二运算放大器的输出端口与所述比较器的第二输入端口相连接，所述比较器的输出端口与所述逻辑控制模块的第一输入端口相连接，所述逻辑控制模块的输出端口与所述DCDC控制器的输入端口、所述计时模块的输入端口相连接，所述DCDC控制器的输出端口与所述逻辑控制模块的第二输入端口、所述逻辑处理模块的第一输入端口相连接，所述计时模块的输出端口与所述逻辑处理模块的第二输入端口相连接，所述逻辑处理模块的输出端口与所述逻辑控制模块的第三输入端口相连接，所述逻辑控制模块用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，所述模式转换指示信号为所述DCDC控制器的输出信号，所述逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号确定第二运行周期的过压判断阈值，所述第二运行周期为所述第一运行周期之后的周期，所述比较器用于根据所述过压判断阈值在所述第二运行周期内进行过压判断，因此，可以通过模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号确定的过压判断阈值进行过压判断，从而提升了过压判断时的准确性，进而减少了振荡纹波的形成，提升了稳定性。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供了一种临界值振荡控制装置的结构示意图；
图2为本申请实施例提供了另一种临界值振荡控制装置的结构示意图；
图3为本申请实施例提供了一种逻辑控制模块的基本逻辑示意图；
图4为本申请实施例提供的一种临界电流时输出波形图；
图5为本申请实施例提供了一种临界电流和重载时输出波形。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其他步骤或单元。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本申请所描述的实施例可以与其它实施例相结合。
请参阅图1，图1为本申请实施例提供了一种临界值振荡控制装置的结构示意图。如图1所示，该控制装置包括：第一运算放大器1、第二运算放大器2、比较器3、逻辑控制模块4、DCDC控制器5、计时模块6和逻辑处理模块7，其中，
所述第一运算放大器1的输入端口与所述第二运算放大器2的输入端口相连接，所述第一运算放大器1的输出端口与所述比较器3的第一输入端口相连接，所述第二运算放大器2的输出端口与所述比较器3的第二输入端口相连接，所述比较器3的输出端口与所述逻辑控制模块4的第一输入端口相连接，所述逻辑控制模块4的输出端口与所述DCDC控制器5的输入端口、所述计时模块6的输入端口相连接，所述DCDC控制器5的输出端口与所述逻辑控制模块4的第二输入端口、所述逻辑处理模块7的第一输入端口相连接，所述计时模块6的输出端口与所述逻辑处理模块7的第二输入端口相连接，所述逻辑处理模块7的输出端口与所述逻辑控制模块4的第三输入端口相连接；
所述逻辑控制模块4用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，所述模式转换指示信号为所述DCDC控制器5的输出信号；
所述逻辑控制模块4用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块7的输出信号确定第二运行周期的过压判断阈值，所述第二运行周期为所述第一运行周期之后的周期；
所述比较器3用于根据所述过压判断阈值在所述第二运行周期内进行过压判断。
在一个可能的实现方式中，如图1所示，临界值振荡控制装置还包括：第一电阻R1和第二电阻R2，其中，所述第一电阻R1的第二端与所述第二电阻R2的第一端、所述第一运算放大器1的输入端口、所述第二运算放大器2的输入端口相连接，所述第二电阻R2的第二端接地，所述第一电阻R1的第一端为信号输入端口。
在一个可能的实现方式中，所述逻辑控制模块4用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块7的输出信号确定第二运行周期的过压判断阈值，包括：
所述逻辑控制模块4用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块7的输出信号进行或运算，以得到运算结果；
所述逻辑控制模块4用于根据所述运算结果，确定所述第二运行周期的过压判断阈值。
其中，具体例如，模式转换指示信号的逻辑数值可以是0或1。负载电流的类型与低功耗信号相关联，负载电流的类型为低功耗的负载电流，则低功耗信号的逻辑数值为1，负载电流的类型为非低功耗的负载电流，则低功耗信号的逻辑数值为0。运算结果包括有0或1，若运算结果为1，则第二运行周期的过压判断阈值为低功耗判断阈值。若运算结果为0，则第二运行周期的过压判断阈值为非低功耗判断阈值。低功耗判断阈值和非低功耗判断阈值之间的差值通常较大，因此，则可以减少出现交替以低功耗判断阈值和非低功耗判断阈值进行过压判断的情况，从而减少振荡纹波的出现。
如图1中所示的PSM信号为低功耗指示信号，PSM信号的逻辑数值为1，则指示处于低功耗模式。
在一个可能的实现方式中，所述逻辑控制模块4用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，包括：
所述逻辑控制模块4用于，若所述第一运行周期的工作模式为PWM工作模式，则将所述模式转换指示信号的数值确定为第一数值；
若所述第一运行周期的工作模式为PSM工作模式，则将所述模式转换指示信号的数值确定为第二数值。
在一个可能的实现方式中，如图2所示，控制装置还包括：滤波模块，所述滤波模块包括第三电阻R3和第一电容C1，所述第三电阻R3的第一端与所述第一运算放大器1的输入端口、所述第一电容C1的第一端相连接，所述第三电阻R3的第二端与所述第一电阻R1的第二端、所述第二电阻R2的第一端、所述第一电容C1的第二端相连接。
在一个具体的实施例中，图3还提供了一种逻辑控制模块的基本逻辑示意图。
其中，Comp信号为比较器的输出信号，PSM信号为PSM工作模式的指示信号，PLO信号为模式转换指示信号。
具体的控制逻辑如下：
由Comp比较电路判断DCDC输出过压，过压值由前一周期判断的工作模式决定。Comp比较电路发出的过压信号先发送给增加的逻辑控制模块。逻辑控制模块会主动屏蔽送过来的第一次过压信号，以及判断当前是否处于PSM模式，当两个条件同时满足后，再将过压信号同时发送给DCDC控制器(DCDC Controller)和低功耗计时模块(Low Power Timer)。DCDC控制器会根据收到的过压信号控制功率管子的关断。低功耗计时模块会根据收到的过压信号开启低功耗判断计时，计时满后会置起PLOUT低功耗信号。其中，内部信号PLO为在PWM模式下，电流采样电路判断PWM转PSM的模式指示信号，默认轻载PLO＝1。内部信号PLOUT为低功耗信号，当低功耗计时满后，置起PLOUT＝1。PLO与PLOUT相或得到PSM信号， 同时PSM信号再返回给逻辑控制模块进行下一次的判断。
如图4所示，图4示出了一种临界电流时输出波形图。
在①阶段，处于PWM工作模式下，但屏蔽第一次过压，也就是不看阶段①的PLOUT结果。此时由于默认PLO＝1，所以PSM＝1，同意转入低功耗，下一周期②以PSM OV阈值作为过压判断。
在②阶段，若出现图4中非低功耗的负载电流，计数T<Tlp，则PLOUT＝0，但由于PLO＝1，根据图3逻辑，PLO|PLOUT＝PSM＝1，仍满足低功耗条件，下一周期③继续以PSM OV阈值作为过压判断。在②阶段，若不出现图4中非低功耗的负载电流，而计数T>Tlp，则PLOUT＝1，此时由于PLO＝1，根据图3逻辑，PLO|PLOUT＝PSM＝1，也满足低功耗条件，下一周期③也继续会以PSM OV阈值作为过压判断。
③、④阶段与前述①、②阶段相同。因此，增加的逻辑控制模块控制PLO信号会一直为1，在某一周期满足低功耗条件后，后面的周期都将以PSM＝1，也就是以PSM OV阈值进行过压判断，从而一直维持低纹波输出，消除输出电压的“大小波”振荡纹波。
在增加逻辑控制模块的新电路，除了消除“大小波”的振荡波形之外，同时也根据PSM转PWM的信号来转换PWM OV过压阈值，因此能做到当负载电流增大，增加到远离低功耗电流值而达到PSM转PWM模式的电流阈值之后，电流采样电路开始工作，使PLO＝0转入PWM工作模式。此后只要负载电流在PWM工作范围内，输出纹波都将会以PWM OV进行过压判断，如图5的阶段⑤所示。
在一个可能实施例中，本申请还提供了一种临界值振荡控制设备，所述控制设备包括电路板和如前述实施例中任一项所述的临界值振荡控制装置。
在一个可能实施例中，本申请还提供了一种无线耳机，所述无线耳机包括壳体和如前述实施例中所述的临界值振荡控制设备。
需要说明的是，对于前述的各方法实施例，为了简单描述，故将其都表述为一系列的动作组合，但是本领域技术人员应该知悉，本申请并不受所描述的动作顺序的限制，因为依据本申请，某些步骤可以采用其他顺序或者同时进行。其次，本领域技术人员也应该知悉，说明书中所描述的实施例均属于优选实施例，所涉及的动作和模块并不一定是本申请所必须的。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在申请明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件程序模块的形式实现。
所述集成的单元如果以软件程序模块的形式实现并作为独立的产品销售或使用时，可以 存储在一个计算机可读取存储器中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储器中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储器包括：U盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储器中，存储器可以包括：闪存盘、只读存储器、随机存取器、磁盘或光盘等。
以上对本申请实施例进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (7)

  1. 一种临界值振荡控制装置，其特征在于，所述控制装置包括：第一运算放大器、第二运算放大器、比较器、逻辑控制模块、DCDC控制器、计时模块和逻辑处理模块，其中，
    所述第一运算放大器的输入端口与所述第二运算放大器的输入端口相连接，所述第一运算放大器的输出端口与所述比较器的第一输入端口相连接，所述第二运算放大器的输出端口与所述比较器的第二输入端口相连接，所述比较器的输出端口与所述逻辑控制模块的第一输入端口相连接，所述逻辑控制模块的输出端口与所述DCDC控制器的输入端口、所述计时模块的输入端口相连接，所述DCDC控制器的输出端口与所述逻辑控制模块的第二输入端口、所述逻辑处理模块的第一输入端口相连接，所述计时模块的输出端口与所述逻辑处理模块的第二输入端口相连接，所述逻辑处理模块的输出端口与所述逻辑控制模块的第三输入端口相连接；
    所述逻辑控制模块用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，所述模式转换指示信号为所述DCDC控制器的输出信号；
    所述逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号确定第二运行周期的过压判断阈值，所述第二运行周期为所述第一运行周期之后的周期；
    所述比较器用于根据所述过压判断阈值在所述第二运行周期内进行过压判断。
  2. 根据权利要求1所述的控制装置，其特征在于，所述控制装置还包括：第一电阻和第二电阻，其中，所述第一电阻的第二端与所述第二电阻的第一端、所述第一运算放大器的输入端口、所述第二运算放大器的输入端口相连接，所述第二电阻的第二端接地，所述第一电阻的第一端为信号输入端口。
  3. 根据权利要求2所述的控制装置，其特征在于，所述逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号确定第二运行周期的过压判断阈值，包括：
    所述逻辑控制模块用于根据所述模式转换指示信号的数值、负载电流的类型、所述逻辑处理模块的输出信号进行或运算，以得到运算结果；
    所述逻辑控制模块用于根据所述运算结果，确定所述第二运行周期的过压判断阈值。
  4. 根据权利要求3所述的控制装置，其特征在于，所述逻辑控制模块用于根据第一运行周期的工作模式，确定模式转换指示信号的数值，包括：
    所述逻辑控制模块用于，若所述第一运行周期的工作模式为PWM工作模式，则将所述模式转换指示信号的数值确定为第一数值；
    若所述第一运行周期的工作模式为PSM工作模式，则将所述模式转换指示信号的数值确定为第二数值。
  5. 根据权利要求4所述的控制装置，其特征在于，控制装置还包括：滤波模块，所述滤波模块包括第三电阻和第一电容，所述第三电阻的第一端与所述第一运算放大器的输入端口、所述第一电容的第一端相连接，所述第三电阻的第二端与所述第一电阻的第二端、所述第二电阻的第一端、所述第一电容的第二端相连接。
  6. 一种临界值振荡控制设备，其特征在于，所述控制设备包括电路板和如权利要求1-5任一项所述的临界值振荡控制装置。
  7. 一种无线耳机，其特征在于，所述无线耳机包括壳体和如权利要求6所述的临界值振 荡控制设备。
PCT/CN2023/080306 2022-03-08 2023-03-08 临界值振荡控制装置、设备及无线耳机 WO2023169470A1 (zh)

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