WO2025214367A1 - 一种电压跟踪二级驱动电路及照明装置 - Google Patents

一种电压跟踪二级驱动电路及照明装置

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Publication number
WO2025214367A1
WO2025214367A1 PCT/CN2025/087846 CN2025087846W WO2025214367A1 WO 2025214367 A1 WO2025214367 A1 WO 2025214367A1 CN 2025087846 W CN2025087846 W CN 2025087846W WO 2025214367 A1 WO2025214367 A1 WO 2025214367A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
module
resistor
boost
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/087846
Other languages
English (en)
French (fr)
Inventor
刁显江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Opple Lighting Co Ltd
Suzhou Op Lighting Co Ltd
Original Assignee
Opple Lighting Co Ltd
Suzhou Op Lighting Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202420711926.0U external-priority patent/CN222395847U/zh
Priority claimed from CN202410417787.5A external-priority patent/CN120786762A/zh
Application filed by Opple Lighting Co Ltd, Suzhou Op Lighting Co Ltd filed Critical Opple Lighting Co Ltd
Publication of WO2025214367A1 publication Critical patent/WO2025214367A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology

Definitions

  • the present application relates to the technical field of lighting drive circuits, and in particular to a voltage tracking secondary drive circuit and a lighting device.
  • a two-stage topology consisting of a boost circuit and a voltage regulator circuit is widely used in LED lighting driver circuits.
  • the boost circuit in the front stage boosts the voltage, while the voltage regulator in the back stage adjusts the boosted output voltage to a voltage range suitable for the lighting component.
  • the output voltage of a boost circuit cannot be too low, a minimum voltage difference between the input and output voltages is required for proper operation. This means the output voltage of the boost circuit must exceed the minimum voltage difference threshold.
  • the AC voltage provided by the grid is set at 220V ⁇ 20%, meaning the maximum AC fluctuation error is 264V.
  • the output voltage of the boost circuit is typically set at 400V DC to ensure proper operation.
  • the switching loss of the switching tube increases as the voltage increases.
  • the switching tubes in the boost circuit and the voltage regulation circuit will have higher switching losses, resulting in increased power loss, which is not conducive to improving efficiency.
  • the present application provides a voltage tracking secondary drive circuit and a lighting device to solve the defects of large power loss and low efficiency of the secondary drive circuit in traditional technology.
  • the present application provides a voltage tracking secondary drive circuit, comprising:
  • a rectifier module wherein an input end of the rectifier module is configured to be connected to the mains;
  • a boost module connected to the output end of the rectifier module
  • a voltage regulating module connected to the output end of the boost module
  • a first voltage detection module connected to the input end of the boost module
  • a second voltage detection module is connected to the output end of the boost module
  • a feedback control module is respectively connected to the first voltage detection module, the second voltage detection module and the controlled end of the boost module.
  • the feedback control module is configured to generate a feedback signal based on the voltage difference between the first voltage detected by the first voltage detection module and the second voltage detected by the second voltage detection module.
  • the feedback signal is configured to adjust the output voltage of the boost module.
  • the feedback control module includes a first control unit and a filtering unit, the first control unit is respectively connected to the first voltage detection module, the second voltage detection module and the input end of the filtering unit, the output end of the filtering unit is connected to the controlled end of the boost module, and the first control unit is configured to generate a pulse width modulation signal according to the voltage difference between the first voltage of the first voltage detection module and the second voltage of the second voltage detection module.
  • the boost module includes a power factor correction boost circuit and a second control unit, the input end of the power factor correction boost circuit is respectively connected to the output end of the rectifier module and the first voltage detection module, the output end of the power factor correction boost circuit is respectively connected to the voltage regulation module and the second voltage detection module, and the second control unit is connected to the controlled end of the power factor correction boost circuit.
  • the power factor correction boost circuit includes a boost inductor, a switch tube, a first diode and a filter capacitor E, one end of the boost inductor is respectively connected to the rectifier module and the first voltage detection module, the other end of the boost inductor is respectively connected to one end of the switch tube and the anode of the first diode, the cathode of the first diode is respectively connected to the voltage regulation module and one end of the filter capacitor E, the other end of the switch tube and the other end of the filter capacitor E are grounded, and the second control unit is connected to the controlled end of the switch tube.
  • the boost module also includes a current detection unit, the current detection unit is connected to the power factor correction boost circuit, the second control unit is connected to the current detection unit, and the second control unit controls the switch tube to be turned on or off when the detection current of the current detection unit is zero.
  • the current detection unit includes a coupled inductor and a current limiting resistor, the coupled inductor is coupled with the boost inductor, one end of the coupled inductor is connected to the second control unit through the current limiting resistor, and the other end of the coupled inductor is grounded.
  • the filtering unit includes a first resistor, a second resistor, a third resistor, a first capacitor and a second capacitor, one end of the first resistor is connected to the first control unit, the other end of the first resistor is respectively connected to one end of the second resistor and one end of the first capacitor, the other end of the second resistor is respectively connected to one end of the third resistor and one end of the second capacitor, the other end of the third resistor is connected to the controlled end of the boost module, and the other end of the first capacitor and the other end of the second capacitor are grounded.
  • the first voltage detection module includes a second diode, a third capacitor, a fourth resistor and a fifth resistor
  • the anode of the second diode is connected to the input end of the boost module
  • the cathode of the second diode is respectively connected to one end of the third capacitor and one end of the fourth resistor
  • the other end of the fourth resistor is respectively connected to one end of the fifth resistor and the feedback control module
  • the other end of the third capacitor and the other end of the fifth resistor are grounded.
  • the second voltage detection module includes a sixth resistor and a seventh resistor, one end of the sixth resistor is connected to the output end of the boost module, the other end of the sixth resistor is respectively connected to the feedback control module and one end of the seventh resistor, and the other end of the seventh resistor is grounded.
  • the present application also provides a lighting device, comprising: the above-mentioned voltage tracking secondary drive circuit, and a lighting component, wherein the output end of the voltage regulating module is connected to the lighting component.
  • the present application provides a voltage-tracking secondary drive circuit and lighting device, which have at least the following beneficial effects: a rectifier module rectifies the input AC power and outputs it to a preceding boost module; the boost module boosts the rectified input electrical signal and converts it into high-voltage direct current; the boost module then outputs the high-voltage direct current to a succeeding voltage regulator module; the regulator adjusts the high-voltage direct current to a suitable voltage range and forms a drive electrical signal that is output to a load, thereby achieving a drive function.
  • a first voltage detection module detects the input voltage of the boost module, i.e., the first voltage is transmitted to a feedback control module;
  • a second voltage detection module detects the output voltage of the boost module, i.e., the second voltage is transmitted to a feedback control module;
  • the feedback control module generates a corresponding feedback signal based on the voltage difference between the first and second voltages, so that the boost module adjusts the output voltage, i.e., the second voltage, under the action of the feedback signal, thereby maintaining the voltage difference between the first and second voltages within a suitable range.
  • the output voltage of the boost module follows the input voltage changes, achieving the effect of voltage tracking. While ensuring the normal operation of the boost module, the output voltage of the boost module is minimized as much as possible, which is conducive to reducing switching losses and improving efficiency.
  • FIG1 is a structural block diagram of a voltage tracking secondary drive circuit provided in an embodiment of the present application.
  • FIG2 is a circuit diagram of one embodiment of a voltage tracking secondary drive circuit provided in an embodiment of the present application.
  • FIG3 is a circuit diagram of another embodiment of a voltage tracking secondary drive circuit provided in an embodiment of the present application.
  • Rectifier module 100 Rectifier module 100; boost module 200; power factor correction boost circuit 210; second control unit 220; current detection unit 230; voltage regulation module 300; first voltage detection module 400; second voltage detection module 500; feedback control module 600; first control unit 610; filter unit 620.
  • a rectifier module 100 wherein the input end of the rectifier module 100 is configured to be connected to the mains;
  • the boost module 200 is connected to the output end of the rectifier module 100;
  • the voltage regulating module 300 is connected to the output end of the boosting module 200;
  • a first voltage detection module 400 is connected to the input end of the boost module 200;
  • a second voltage detection module 500 is connected to the output end of the boost module 200;
  • the feedback control module 600 is respectively connected to the first voltage detection module 400, the second voltage detection module 500 and the controlled end of the boost module 200.
  • the feedback control module 600 is configured to generate a feedback signal based on the voltage difference between the first voltage detected by the first voltage detection module 400 and the second voltage detected by the second voltage detection module 500.
  • the feedback signal is configured to adjust the output voltage of the boost module 200.
  • the rectifier module 100 rectifies the input AC power and outputs it to the preceding boost module 200.
  • the boost module 200 then boosts the rectified input electrical signal into high-voltage direct current (HVDC).
  • the boost module 200 then outputs the HVDC to the succeeding voltage regulator module 300.
  • the voltage regulator module 300 adjusts the HVDC to an appropriate voltage range and generates a drive signal that is then output to the load, achieving the driving function.
  • the first voltage detection module 400 detects the input voltage of the boost module 200, i.e., the first voltage, which is transmitted to the feedback control module 600.
  • the second voltage detection module 500 detects the output voltage of the boost module 200, i.e., the second voltage, which is transmitted to the feedback control module 600.
  • the feedback control module 600 generates a corresponding feedback signal based on the voltage difference between the first and second voltages.
  • This feedback signal causes the boost module 200 to adjust the output voltage, i.e., the second voltage, in response to the feedback signal, thereby maintaining the voltage difference between the first and second voltages within an appropriate range.
  • this application Compared to solutions with a fixed output voltage of 400V, this application generates a feedback signal based on the voltage difference between the input and output voltages of the boost module 200, allowing the output voltage of the boost module 200 to track the input voltage, achieving a voltage tracking effect. While ensuring the normal operation of the boost module 200, the output voltage of the boost module 200 is minimized, which helps reduce switching losses and improve efficiency. In areas with lower mains voltages, such as areas with AC 120V or 110V mains, the effect of reducing switching losses and improving efficiency is even more significant and effective.
  • the post-stage voltage regulation module 300 may be an implementation scheme including an isolated flyback voltage regulation circuit, a non-isolated flyback voltage regulation circuit, a step-down Buck voltage regulation circuit, and the like, to achieve the function of adjusting the output voltage of the boost module 200 so that the final driving voltage meets the rated operating voltage requirement of the lighting component.
  • the boost module 200 and the voltage regulator module 300 include switching transistors, which may be integrated within the chip.
  • the flyback control chip within the flyback voltage regulator circuit may be a BP3337D chip with an integrated switching transistor.
  • the rectifier module 100 may include a rectifier bridge chip or a rectifier bridge circuit formed by four diodes, etc., to rectify the input mains power.
  • the feedback control module 600 includes a first control unit 610 and a filtering unit 620.
  • the first control unit 610 is respectively connected to the first voltage detection module 400, the second voltage detection module 500 and the input end of the filtering unit 620, and the output end of the filtering unit 620 is connected to the controlled end of the boost module 200.
  • the first control unit 610 is configured to generate a pulse width modulation signal according to the voltage difference between the first voltage of the first voltage detection module 400 and the second voltage of the second voltage detection module 500.
  • the first control unit 610 generates a pulse-width modulation (PWM) signal with a corresponding duty cycle based on the voltage difference between the first and second voltages.
  • PWM pulse-width modulation
  • the PWM signal forms a stable feedback DC signal, whose voltage corresponds to the duty cycle of the PWM signal.
  • the boost module 200 adjusts its output voltage based on the voltage of the feedback DC signal, maintaining the voltage difference between the output voltage of the boost module 200 and the output voltage within a predetermined range. In this way, feedback regulation of the input-output voltage difference of the boost module 200 is achieved through the PWM signal. Because the PWM signal can precisely control the duty cycle, it facilitates the formation of a more accurate feedback DC signal.
  • filtering the PWM signal to form the corresponding feedback DC signal eliminates the need for components or circuits to directly generate the feedback DC signal with a corresponding voltage based on the voltage difference between the first and second voltages, thereby simplifying the circuit structure.
  • the PWM signal After filtering, the PWM signal forms a DC voltage with an average voltage. Therefore, the duty cycle of the PWM signal is linearly related to the voltage of the feedback DC signal.
  • the voltage of the feedback DC signal, Vfb is calculated as: D x 3.3, where D is the duty cycle.
  • D the duty cycle
  • Vfb the voltage of the feedback DC signal
  • the first control unit 610 may be implemented as a single-chip microcomputer, an embedded chip, or other devices.
  • the single-chip microcomputer may be a model having an ADC sampling function and a PWM signal output function.
  • the feedback control module 600 may also include a subtraction circuit formed by an integrated operational amplifier, with the first voltage detection module 400 connected to the first input terminal of the subtraction circuit, the second voltage detection module 500 connected to the second input terminal of the subtraction circuit, and the output terminal of the subtraction circuit connected to the controlled terminal of the boost module 200.
  • the output voltage value of the subtraction circuit is determined by the difference between the voltage at the first input terminal and the voltage at the second input terminal.
  • a feedback DC signal of a corresponding voltage magnitude can be directly generated based on the voltage difference between the first and second voltages.
  • the boost module 200 includes a power factor correction boost circuit 210 and a second control unit 220, the input end of the power factor correction boost circuit 210 is respectively connected to the output end of the rectifier module 100 and the first voltage detection module 400, the output end of the power factor correction boost circuit 210 is respectively connected to the voltage regulation module 300 and the second voltage detection module 500, and the second control unit 220 is connected to the controlled end of the power factor correction boost circuit 210.
  • the power factor correction (PFC) boost circuit not only boosts the voltage but also reduces the phase difference between the voltage and current to improve the power factor.
  • the second control unit 220 controls the output voltage of the PFC boost circuit based on the feedback DC signal generated by the feedback control module 600, thereby ensuring that the voltage difference between the input voltage and the output voltage of the PFC boost circuit is within a set range.
  • the second control unit 220 may include a PFC control chip, a single-chip microcomputer, or other devices, and may control the output voltage of the PFC boost circuit based on the feedback signal from the feedback control module 600.
  • the PFC control chip included in the second control unit 220 may be a PFC IC BP2628, MP44018, MP44014, ST6562A, or other chip models.
  • the power factor correction boost circuit 210 includes a boost inductor, a switch tube Q1, a first diode D2 and a filter capacitor EC1, one end of the boost inductor is respectively connected to the rectifier module 100 and the first voltage detection module 400, the other end of the boost inductor is respectively connected to one end of the switch tube Q1 and the anode of the first diode D2, the cathode of the first diode D2 is respectively connected to the voltage regulation module 300 and one end of the filter capacitor EC1, the other end of the switch tube Q1 and the other end of the filter capacitor EC1 are grounded, and the second control unit 220 is connected to the controlled end of the switch tube Q1.
  • the boost inductor, the switch tube Q1, the first diode D2 and the filter capacitor EC1 form a Boost circuit.
  • the second control unit 220 controls the switch tube Q1 to be turned on and off, so that the boost inductor and the filter capacitor EC1 are charged and discharged, thereby achieving the boost function and the power factor correction effect.
  • the power factor correction boost circuit 210 may also include an active PFC boost circuit, such as a full-bridge PFC circuit, a flyback PFC circuit, etc.
  • the switch tube Q1 may be implemented as a MOS tube, an IGBT tube, or other devices.
  • the boost module 200 also includes a current detection unit 230, the current detection unit 230 is connected to the power factor correction boost circuit 210, and the second control unit 220 is connected to the current detection unit 230.
  • the second control unit 220 controls the switch tube Q1 to be turned on or off when the detection current of the current detection unit 230 is zero.
  • the current of the PFC boost circuit is detected by the current detection unit 230 so as to control the switch tube Q1 to switch on or off when the current is zero, which is beneficial to further reduce the switching loss of the switch tube Q1 and improve efficiency.
  • the current detection unit 230 includes a coupled inductor and a current limiting resistor R11, the coupled inductor is coupled with the boost inductor, one end of the coupled inductor is connected to the second control unit 220 through the current limiting resistor R11, and the other end of the coupled inductor is grounded.
  • the current changes in the coupled inductor are consistent with the current changes in the boost inductor.
  • the current in the coupled inductor is converted into a voltage signal through the current-limiting resistor R11 and transmitted to the second control unit 220, thus implementing the current detection function for the boost inductor.
  • the current-limiting resistor R11 is configured to limit the current to prevent excessive current, thereby protecting the second control unit 220.
  • the current detection unit 230 may also be a current detection circuit formed by a resistor.
  • the filtering unit 620 includes a first resistor R5, a second resistor R6, a third resistor R7, a first capacitor C2 and a second capacitor C3, one end of the first resistor R5 is connected to the first control unit 610, the other end of the first resistor R5 is respectively connected to one end of the second resistor R6 and one end of the first capacitor C2, the other end of the second resistor R6 is respectively connected to one end of the third resistor R7 and one end of the second capacitor C3, the other end of the third resistor R7 is connected to the controlled end of the boost module 200, and the other end of the first capacitor C2 and the other end of the second capacitor C3 are grounded.
  • the first resistor R5 and the first capacitor C2 form a first-stage RC filter circuit
  • the second resistor R6 and the second capacitor C3 form a second-stage RC filter circuit.
  • the PWM signal generated by the first control unit 610 is filtered by the two-stage RC filter circuit to ensure that the PWM signal is converted into a feedback DC signal.
  • the third resistor R7 can limit the current generated by the feedback DC signal to protect the controlled end of the boost module 200 and the feedback end pin of the second control unit 220.
  • the filtering unit 620 may include only one stage of filtering circuit or more than two stages of filtering circuit, depending on the filtering accuracy requirement for converting the PWM signal into the feedback DC signal.
  • the first voltage detection module 400 includes a second diode D1, a third capacitor C1, a fourth resistor R3 and a fifth resistor R4, the anode of the second diode D1 is connected to the input end of the boost module 200, the cathode of the second diode D1 is respectively connected to one end of the third capacitor C1 and one end of the fourth resistor R3, the other end of the fourth resistor R3 is respectively connected to one end of the fifth resistor R4 and the feedback control module 600, and the other end of the third capacitor C1 and the other end of the fifth resistor R4 are grounded.
  • the first voltage detection module 400 detects the input voltage of the boost module 200. Since the AC power rectified by the rectifier module 100 typically produces a half-wave signal with fluctuations, the third capacitor C1 is provided to filter the input voltage to form a more stable voltage. The input voltage is then divided by a voltage divider circuit formed by the fourth resistor R3 and the fifth resistor R4 to convert it to a voltage range of appropriate magnitude, forming a first voltage that is transmitted to the first control unit 610. This achieves the function of detecting the input voltage of the boost module 200. The circuit structure is simple and easy to implement. Furthermore, to prevent the reverse output of the electrical energy stored in the third capacitor C1 to the boost module 200, the second diode D1 is used to limit the direction of current flow, thereby protecting the boost module 200 and improving reliability.
  • the second voltage detection module 500 includes a sixth resistor R8 and a seventh resistor R9, one end of the sixth resistor R8 is connected to the output end of the boost module 200, and the other end of the sixth resistor R8 is respectively connected to the feedback control module 600 and one end of the seventh resistor R9, and the other end of the seventh resistor R9 is grounded.
  • the output of the boost module 200 is direct current.
  • the output voltage of the boost module 200 is divided by the voltage divider circuit formed by the sixth resistor R8 and the seventh resistor R9 to convert it into a voltage range of appropriate size, forming a second voltage that is transmitted to the second control unit 220, thereby achieving the function of detecting the output voltage of the boost module 200.
  • the circuit structure is simple and easy to implement.
  • the lighting device provided in the present application is described below.
  • the lighting device described below and the voltage tracking secondary drive circuit described above can be referenced to each other.
  • the present application also provides a lighting device, comprising: the above-mentioned voltage tracking secondary drive circuit, and also comprising a lighting component, wherein the output end of the voltage regulating module 300 is connected to the lighting component.
  • the rectifier module 100 rectifies the input AC power and outputs it to the front-stage boost module 200.
  • the boost module 200 boosts the rectified input electrical signal and converts it into high-voltage direct current.
  • the boost module 200 then outputs the high-voltage direct current to the rear-stage voltage regulating module 300.
  • the voltage regulating module 300 adjusts the high-voltage direct current to a suitable voltage range and forms a driving electrical signal to output to the lighting component to drive the lighting component to perform lighting work.
  • the first voltage detection module 400 detects the input voltage of the boost module 200, that is, the first voltage is transmitted to the feedback control module 600
  • the second voltage detection module 500 detects the output voltage of the boost module 200, that is, the second voltage is transmitted to the feedback control module 600.
  • the feedback control module 600 generates a corresponding feedback signal according to the voltage difference between the first voltage and the second voltage, so that the boost module 200 adjusts the output voltage, that is, the size of the second voltage, under the action of the feedback signal, so as to maintain the voltage difference between the first voltage and the second voltage within an appropriate range.
  • the output voltage of the boost module 200 follows the input voltage changes, thereby achieving a voltage tracking effect. While ensuring the normal operation of the boost module 200, the output voltage of the boost module 200 is minimized as much as possible, which is beneficial to reducing switching losses and improving efficiency.
  • first and second are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as “first” or “second” may explicitly or implicitly include at least one of such features.
  • “plurality” means at least two, for example, two, three, etc., unless otherwise specifically defined.

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Abstract

本申请提供一种电压跟踪二级驱动电路及照明装置，涉及照明驱动电路技术领域，所述电路包括：整流模块；升压模块，与所述整流模块的输出端连接；调压模块，与所述升压模块的输出端连接；第一电压检测模块，与所述升压模块的输入端连接；第二电压检测模块，与升压模块的输出端连接；反馈控制模块，分别与第一电压检测模块、第二电压检测模块以及升压模块的受控端连接。通过根据升压模块的输入电压与输出电压的电压差产生反馈信号，使得升压模块的输出电压跟随着输入电压变化，在保障升压模块正常工作的同时，尽量减小升压模块的输出电压大小，有利于减小开关损耗提高效率。

Description

一种电压跟踪二级驱动电路及照明装置
相关申请的交叉引用
本申请要求于2024年04月08日提交的申请号为2024207119260，名称为“一种电压跟踪二级驱动电路及照明装置”的中国专利申请的优先权，以及于2024年04月08日提交的申请号为2024104177875，名称为“一种电压跟踪二级驱动电路及照明装置”的中国专利申请的优先权，其通过引用方式全部并入本文。
技术领域
本申请涉及照明驱动电路技术领域，尤其涉及一种电压跟踪二级驱动电路及照明装置。
背景技术
随着生活水平的提高，LED照明越来越多的应用在很多场景中。LED照明驱动电路中，广泛应用升压电路和调压电路的二级拓扑架构，前级的升压电路部分，对电压进行升压，后级的调压电路部分，将升压输出的电压调整至适合照明件工作的电压范围。
由于升压电路的输出电压不能过低，正常工作需要输入电压与输出电压存在最小电压差，即升压电路的输出电压需要超出输入电压最小电压差阈值。传统技术中，考虑到市电电网波动的情况，电网提供的交流电电压为220V±20％，即交流电波动误差最大值为264V，而264V交流电的峰值电压为264×√2＝373V，在加上最小电压差阈值，升压电路的输出电压通常会设定在直流电400V，以确保升压电路能够正常工作。
然而，开关管在电压越大时产生的开关损耗亦会增加，在升压电路输出电压设定在较高值得情况下，升压电路与调压电路中的开关管会存在较高的开关损耗，导致电能损耗增大，不利于提高效率。
发明内容
本申请提供一种电压跟踪二级驱动电路及照明装置，用以解决传统技术中二级驱动电路存在电能损耗较大以及效率较低的缺陷。
本申请提供一种电压跟踪二级驱动电路，包括：
整流模块，所述整流模块的输入端被配置为与市电连接；
升压模块，与所述整流模块的输出端连接；
调压模块，与所述升压模块的输出端连接；
第一电压检测模块，与所述升压模块的输入端连接；
第二电压检测模块，与所述升压模块的输出端连接；
反馈控制模块，分别与所述第一电压检测模块、第二电压检测模块以及所述升压模块的受控端连接，所述反馈控制模块被配置为根据所述第一电压检测模块检测的第一电压与所述第二电压检测模块检测的第二电压之间的电压差生成反馈信号，所述反馈信号被配置为调节所述升压模块的输出电压。
根据本申请提供的一种电压跟踪二级驱动电路，所述反馈控制模块包括第一控制单元以及滤波单元，所述第一控制单元分别与所述第一电压检测模块、所述第二电压检测模块以及所述滤波单元的输入端连接，所述滤波单元的输出端与所述升压模块的受控端连接，所述第一控制单元被配置为根据所述第一电压检测模块的第一电压与所述第二电压检测模块的第二电压之间的电压差生成脉冲宽度调制信号。
根据本申请提供的一种电压跟踪二级驱动电路，所述升压模块包括功率因数校正升压电路以及第二控制单元，所述功率因数校正升压电路的输入端分别与所述整流模块的输出端以及所述第一电压检测模块连接，所述功率因数校正升压电路的输出端分别与所述调压模块以及所述第二电压检测模块连接，所述第二控制单元与所述功率因数校正升压电路的受控端连接。
根据本申请提供的一种电压跟踪二级驱动电路，所述功率因数校正升压电路包括升压电感、开关管、第一二极管以及滤波电容E，所述升压电感的一端分别与所述整流模块以及所述第一电压检测模块连接，所述升压电感的另一端分别与所述开关管的一端以及所述第一二极管的阳极连接，所述第一二极管的阴极分别与所述调压模块以及所述滤波电容E的一端连接，所述开关管的另一端以及所述滤波电容E的另一端接地，所述第二控制单元与所述开关管的受控端连接。
根据本申请提供的一种电压跟踪二级驱动电路，所述升压模块还包括电流检测单元，所述电流检测单元与所述功率因数校正升压电路连接，所述第二控制单元与所述电流检测单元连接，所述第二控制单元根据所述电流检测单元的检测电流为零时控制所述开关管导通或截止。
根据本申请提供的一种电压跟踪二级驱动电路，所述电流检测单元包括耦合电感以及限流电阻，所述耦合电感与所述升压电感耦合，所述耦合电感的一端通过所述限流电阻与所述第二控制单元连接，所述耦合电感的另一端接地。
根据本申请提供的一种电压跟踪二级驱动电路，所述滤波单元包括第一电阻、第二电阻、第三电阻、第一电容以及第二电容，所述第一电阻的一端与所述第一控制单元连接，所述第一电阻的另一端分别与所述第二电阻的一端以及所述第一电容的一端连接，所述第二电阻的另一端分别与所述第三电阻的一端以及所述第二电容的一端连接，所述第三电阻的另一端与所述升压模块的受控端连接，所述第一电容的另一端以及所述第二电容的另一端接地。
根据本申请提供的一种电压跟踪二级驱动电路，所述第一电压检测模块包括第二二极管、第三电容、第四电阻以及第五电阻，所述第二二极管的阳极与所述升压模块的输入端连接，所述第二二极管的阴极分别与所述第三电容的一端以及所述第四电阻的一端连接，所述第四电阻的另一端分别与所述第五电阻的一端以及所述反馈控制模块连接，所述第三电容的另一端以及所述第五电阻的另一端接地。
根据本申请提供的一种电压跟踪二级驱动电路，所述第二电压检测模块包括第六电阻以及第七电阻，所述第六电阻的一端与所述升压模块的输出端连接，所述第六电阻的另一端分别与所述反馈控制模块以及所述第七电阻的一端连接，所述第七电阻的另一端接地。
本申请还提供照明装置，包括：上述的一种电压跟踪二级驱动电路，还包括照明件，所述调压模块的输出端与所述照明件连接。
本申请提供的一种电压跟踪二级驱动电路及照明装置，至少具有以下的有益效果：整流模块对输入的市电整流形后输出至前级的升压模块，升压模块将整流后输入电信号升压转换为高压直流电，然后升压模块将高压直流电输出至后级的调压模块，调压模块将高压直流电调整至合适的电压范围后形成驱动电信号输出至负载，实现驱动功能。同时，第一电压检测模块检测升压模块的输入电压，即第一电压传输至反馈控制模块，第二电压检测模块检测升压模块的输出电压，即第二电压传输至反馈控制模块，反馈控制模块根据第一电压与第二电压的电压差大小，生成对应的反馈信号，以使得升压模块在反馈信号的作用下调整输出电压，即第二电压的大小，进而能够令第一电压与第二电压的电压差维持在合适范围。以此，通过根据升压模块的输入电压与输出电压的电压差产生反馈信号，使得升压模块的输出电压跟随着输入电压变化，达到电压跟踪的效果，在保障升压模块正常工作的同时，尽量减小升压模块的输出电压大小，有利于减小开关损耗提高效率。
附图说明
为了更清楚地说明本申请或传统技术中的技术方案，下面将对实施例或传统技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图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是本申请实施例提供的一种电压跟踪二级驱动电路的结构框图；
图2是本申请实施例提供的一种电压跟踪二级驱动电路其中一种实施例的电路图；
图3是本申请实施例提供的一种电压跟踪二级驱动电路另一种实施例的电路图。
附图标记：
整流模块100；升压模块200；功率因数校正升压电路210；第二
控制单元220；电流检测单元230；调压模块300；第一电压检测模块400；第二电压检测模块500；反馈控制模块600；第一控制单元610；滤波单元620。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请中的附图，对本申请中的技术方案进行清楚、完整地描述，显然，所描述的实施例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作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。
下面结合图1-图3描述本申请的一种电压跟踪二级驱动电路，包括：
整流模块100，所述整流模块100的输入端被配置为与市电连接；
升压模块200，与所述整流模块100的输出端连接；
调压模块300，与所述升压模块200的输出端连接；
第一电压检测模块400，与所述升压模块200的输入端连接；
第二电压检测模块500，与所述升压模块200的输出端连接；
反馈控制模块600，分别与所述第一电压检测模块400、第二电压检测模块500以及所述升压模块200的受控端连接，所述反馈控制模块600被配置为根据所述第一电压检测模块400检测的第一电压与所述第二电压检测模块500检测的第二电压之间的电压差生成反馈信号，所述反馈信号被配置为调节所述升压模块200的输出电压。
整流模块100对输入的市电整流形后输出至前级的升压模块200，升压模块200将整流后输入电信号升压转换为高压直流电，然后升压模块200将高压直流电输出至后级的调压模块300，调压模块300将高压直流电调整至合适的电压范围后形成驱动电信号输出至负载，实现驱动功能。同时，第一电压检测模块400检测升压模块200的输入电压，即第一电压传输至反馈控制模块600，第二电压检测模块500检测升压模块200的输出电压，即第二电压传输至反馈控制模块600，反馈控制模块600根据第一电压与第二电压的电压差大小，生成对应的反馈信号，以使得升压模块200在反馈信号的作用下调整输出电压，即第二电压的大小，进而能够令第一电压与第二电压的电压差维持在合适范围。
相较于固定输出电压为400V的方案，本申请通过根据升压模块200的输入电压与输出电压的电压差产生反馈信号，使得升压模块200的输出电压跟随着输入电压变化，达到电压跟踪的效果，在保障升压模块200正常工作的同时，尽量减小升压模块200的输出电压大小，有利于减小开关损耗提高效率。在市电电压更低的地区，如市电为交流电120V、110V的地区，降低开关管损耗提高效率的效果更加明显有效。
参考图2和图3，后级的调压模块300可以是包括隔离式反激调压电路、非隔离式反激调压电路、降压Buck调压电路等电路的实施方式，实现对升压模块200的输出电压进行调整的功能，以让最终的驱动电压满足照明件额定工作电压的需求。
可以理解的是，升压模块200以及调压模块300中包括开关管，开关管可以是集成在芯片内。如图2中，在本申请的一些实施例中，调压模块300采用反激调压电路时，反激调压电路中的反激控制芯片可以选用型号为BP3337D内部集成有开关管的芯片。整流模块100可以是包括整流桥芯片或者四个二极管形成的整流桥电路等实施方式，以实现对输入的市电进行整流。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述反馈控制模块600包括第一控制单元610以及滤波单元620，所述第一控制单元610分别与所述第一电压检测模块400、所述第二电压检测模块500以及所述滤波单元620的输入端连接，所述滤波单元620的输出端与所述升压模块200的受控端连接，所述第一控制单元610被配置为根据所述第一电压检测模块400的第一电压与所述第二电压检测模块500的第二电压之间的电压差生成脉冲宽度调制信号。
第一控制单元610根据第一电压与第二电压的电压差大小，生成对应的占空比的脉冲宽度调制(PWM)信号，PWM信号经过滤波单元620的滤波作用后，形成稳定的反馈直流信号并且反馈直流信号的电压大小与PWM信号的占空比相对应，升压模块200根据反馈直流信号的电压大小调节输出电压，使得升压模块200的输出电压与输出电压之间的电压差维持在设定的范围内。以此，通过PWM信号，实现对升压模块200的输入输出电压差的反馈调节，由于PWM信号可以精准控制占空比，有利于形成更加精准的反馈直流信号。同时对PWM信号进行滤波形成对应反馈直流信号的方式，由于无需要求器件或电路根据第一电压与第二电压的电压差直接生成对应电压大小的反馈直流信号，有利于简化电路结构。
PWM信号经过滤波处理后形成平均电压大小的直流电，因此PWM信号的占空比与反馈直流信号的电压具有线性关系。为了便于理解举一个例子：假设PWM信号的高电平为3.3V并且低电平为0V，则反馈直流信号的电压Vfb＝D×3.3，其中D为占空比，当占空比D＝100％时Vfb＝3.3V，D＝0％时Vfb＝0V，基于占空比与反馈直流信号压的线性关系，能够实现0V至3V之间的无级调压，更加精准形成反馈直流信号Vfb传输至升压模块200的受控端。
第一控制单元610可以是包括单片机、嵌入式芯片等器件的实施方式，在包括单片机的实施例中，单片机可以选取具有ADC采样功能以及PWM信号输出功能的型号。
在本申请的一些实施例中，反馈控制模块600还可以是包括由集成运算放大器形成的减法运算电路，第一电压检测模块400与减法运算电路的第一输入端连接，第二电压检测模块500与减法运算电路的第二输入端连接，减法运算电路的输出端与升压模块200的受控端连接，减法运算电路的输出电压值由第一输入端的电压与第二输入端的电压两者之差决定。以此实施方式，可以直接根据第一电压与第二电压的电压差生成对应电压大小的反馈直流信号。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述升压模块200包括功率因数校正升压电路210以及第二控制单元220，所述功率因数校正升压电路210的输入端分别与所述整流模块100的输出端以及所述第一电压检测模块400连接，所述功率因数校正升压电路210的输出端分别与所述调压模块300以及所述第二电压检测模块500连接，所述第二控制单元220与所述功率因数校正升压电路210的受控端连接。
在第二控制单元220的控制下，功率因数校正(PFC)升压电路在对电压进行升压的同时，亦减小电压与电流之间的相位差以提高功率因数，第二控制单元220根据反馈控制模块600产生的反馈直流信号，控制PFC升压电路的输出电压，达到令PFC升压电路的输入电压与输出电压之间的电压差在设定范围内的效果。
第二控制单元220可以是包括PFC控制芯片、单片机等器件的的实施方式，能够根据反馈控制模块600的反馈信号控制PFC升压电路的输出电压。在本申请的一些实施例中，第二控制单元220包括的PFC控制芯片可以是为PFC IC BP2628、MP44018、MP44014、ST6562A等芯片型号。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述功率因数校正升压电路210包括升压电感、开关管Q1、第一二极管D2以及滤波电容EC1，所述升压电感的一端分别与所述整流模块100以及所述第一电压检测模块400连接，所述升压电感的另一端分别与所述开关管Q1的一端以及所述第一二极管D2的阳极连接，所述第一二极管D2的阴极分别与所述调压模块300以及所述滤波电容EC1的一端连接，所述开关管Q1的另一端以及所述滤波电容EC1的另一端接地，所述第二控制单元220与所述开关管Q1的受控端连接。
升压电感、开关管Q1、第一二极管D2以及滤波电容EC1形成Boost电路，第二控制单元220控制开关管Q1导通和截止，使得升压电感、滤波电容EC1充电、放电，实现升压功能亦达到功率因数校正的效果。
在本申请的一些实施例中，功率因数校正升压电路210还可以是包括主动式PFC升压电路，如全桥PFC电路、反激式PFC电路等。开关管Q1可以是为MOS管、IGBT管等器件的实施方式。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述升压模块200还包括电流检测单元230，所述电流检测单元230与所述功率因数校正升压电路210连接，所述第二控制单元220与所述电流检测单元230连接，所述第二控制单元220根据所述电流检测单元230的检测电流为零时控制所述开关管Q1导通或截止。
通过电流检测单元230检测PFC升压电路的电流，以能够在电流为零时控制开关管Q1切换导通或截止状态，有利于进一步减少开关管Q1的开关损耗，提高效率。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述电流检测单元230包括耦合电感以及限流电阻R11，所述耦合电感与所述升压电感耦合，所述耦合电感的一端通过所述限流电阻R11与所述第二控制单元220连接，所述耦合电感的另一端接地。
通过耦合电感与升压电感耦合，耦合电感的电流变化与升压电感的电流变化一致，耦合电感的电流经限流电阻R11形成电压信号传输至第二控制单元220，实现对升压电感的电流检测功能。限流电阻R11被配置为限制电流大小，避免电流过大，有利于保护第二控制单元220。
在本申请的一些实施例中，电流检测单元230还可以是包括电阻形成的电流检测电路。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述滤波单元620包括第一电阻R5、第二电阻R6、第三电阻R7、第一电容C2以及第二电容C3，所述第一电阻R5的一端与所述第一控制单元610连接，所述第一电阻R5的另一端分别与所述第二电阻R6的一端以及所述第一电容C2的一端连接，所述第二电阻R6的另一端分别与所述第三电阻R7的一端以及所述第二电容C3的一端连接，所述第三电阻R7的另一端与所述升压模块200的受控端连接，所述第一电容C2的另一端以及所述第二电容C3的另一端接地。
第一电阻R5与第一电容C2形成一级RC滤波电路，第二电阻R6与第二电容C3形成二级RC滤波电路，通过两级的RC滤波电路对第一控制单元610产生的PWM信号进行滤波，以确保将PWM信号转换为反馈直流信号，第三电阻R7能够限制反馈直流信号产生的电流大小，保护升压模块200的受控端，第二控制单元220的反馈端脚。
在本申请的一些实施例中，滤波单元620亦可以只包括一级的滤波电路，亦可以包括多于两级的滤波电路，取决于PWM信号转换为反馈直流信号的滤平精度需求。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述第一电压检测模块400包括第二二极管D1、第三电容C1、第四电阻R3以及第五电阻R4，所述第二二极管D1的阳极与所述升压模块200的输入端连接，所述第二二极管D1的阴极分别与所述第三电容C1的一端以及所述第四电阻R3的一端连接，所述第四电阻R3的另一端分别与所述第五电阻R4的一端以及所述反馈控制模块600连接，所述第三电容C1的另一端以及所述第五电阻R4的另一端接地。
第一电压检测模块400检测升压模块200的输入电压，由于整流模块100对市电进行整流后，通常为半波信号具有波动，通过设置有第三电容C1，对输入电压进行滤波以形成更稳定的电压，然后再通过第四电阻R3和第五电阻R4形成的分压电路对输入电压进行分压，以转换至合适大小的电压范围内，形成第一电压传输至第一控制单元610，以此达到对升压模块200的输入电压检测的功能，电路结构简洁便于实施。同时为了避免第三电容C1存储的电能反向输出至升压模块200，通过第二二极管D1限制电流的流动方向，有利于保护升压模块200提高可靠性。
参考图2和图3，在本申请一种电压跟踪二级驱动电路的一些实施例中，所述第二电压检测模块500包括第六电阻R8以及第七电阻R9，所述第六电阻R8的一端与所述升压模块200的输出端连接，所述第六电阻R8的另一端分别与所述反馈控制模块600以及所述第七电阻R9的一端连接，所述第七电阻R9的另一端接地。
升压模块200输出为直流电，通过第六电阻R8与第七电阻R9形成的分压电路对升压模块200的输出电压进行分压，以转换至合适大小的电压范围内，形成第二电压传输至第二控制单元220，以此达到对升压模块200的输出电压检测的功能，电路结构简洁便于实施。
下面对本申请提供的照明装置进行描述，下文描述的照明装置与上文描述的一种电压跟踪二级驱动电路可相互对应参照。
本申请还提供照明装置，包括：上述的一种电压跟踪二级驱动电路，还包括照明件，所述调压模块300的输出端与所述照明件连接。
整流模块100对输入的市电整流形后输出至前级的升压模块200，升压模块200将整流后输入电信号升压转换为高压直流电，然后升压模块200将高压直流电输出至后级的调压模块300，调压模块300将高压直流电调整至合适的电压范围后形成驱动电信号输出至照明件，以驱使照明件进行照明工作。
同时，第一电压检测模块400检测升压模块200的输入电压，即第一电压传输至反馈控制模块600，第二电压检测模块500检测升压模块200的输出电压，即第二电压传输至反馈控制模块600，反馈控制模块600根据第一电压与第二电压的电压差大小，生成对应的反馈信号，以使得升压模块200在反馈信号的作用下调整输出电压，即第二电压的大小，进而能够令第一电压与第二电压的电压差维持在合适范围。
以此，通过根据升压模块200的输入电压与输出电压的电压差产生反馈信号，使得升压模块200的输出电压跟随着输入电压变化，达到电压跟踪的效果，在保障升压模块200正常工作的同时，尽量减小升压模块200的输出电压大小，有利于减小开关损耗提高效率。
在本申请的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个、三个等，除非另有明确具体的限定。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (10)

  1. 一种电压跟踪二级驱动电路，包括：
    整流模块，所述整流模块的输入端被配置为与市电连接；
    升压模块，与所述整流模块的输出端连接；
    调压模块，与所述升压模块的输出端连接；
    第一电压检测模块，与所述升压模块的输入端连接；
    第二电压检测模块，与所述升压模块的输出端连接；
    反馈控制模块，分别与所述第一电压检测模块、第二电压检测模块以及所述升压模块的受控端连接，所述反馈控制模块被配置为根据所述第一电压检测模块检测的第一电压与所述第二电压检测模块检测的第二电压之间的电压差生成反馈信号，所述反馈信号被配置为调节所述升压模块的输出电压。
  2. 根据权利要求1所述的一种电压跟踪二级驱动电路，其中，所述反馈控制模块包括第一控制单元以及滤波单元，所述第一控制单元分别与所述第一电压检测模块、所述第二电压检测模块以及所述滤波单元的输入端连接，所述滤波单元的输出端与所述升压模块的受控端连接，所述第一控制单元被配置为根据所述第一电压检测模块的第一电压与所述第二电压检测模块的第二电压之间的电压差生成脉冲宽度调制信号。
  3. 根据权利要求1所述的一种电压跟踪二级驱动电路，其中，所述升压模块包括功率因数校正升压电路以及第二控制单元，所述功率因数校正升压电路的输入端分别与所述整流模块的输出端以及所述第一电压检测模块连接，所述功率因数校正升压电路的输出端分别与所述调压模块以及所述第二电压检测模块连接，所述第二控制单元与所述功率因数校正升压电路的受控端连接。
  4. 根据权利要求3所述的一种电压跟踪二级驱动电路，其中，所述功率因数校正升压电路包括升压电感、开关管、第一二极管以及滤波电容，所述升压电感的一端分别与所述整流模块以及所述第一电压检测模块连接，所述升压电感的另一端分别与所述开关管的一端以及所述第一二极管的阳极连接，所述第一二极管的阴极分别与所述调压模块以及所述滤波电容的一端连接，所述开关管的另一端以及所述滤波电容的另一端接地，所述第二控制单元与所述开关管的受控端连接。
  5. 根据权利要求4所述的一种电压跟踪二级驱动电路，其中，所述升压模块还包括电流检测单元，所述电流检测单元与所述功率因数校正升压电路连接，所述第二控制单元与所述电流检测单元连接，所述第二控制单元根据所述电流检测单元的检测电流为零时控制所述开关管导通或截止。
  6. 根据权利要求5所述的一种电压跟踪二级驱动电路，其中，所述电流检测单元包括耦合电感以及限流电阻，所述耦合电感与所述升压电感耦合，所述耦合电感的一端通过所述限流电阻与所述第二控制单元连接，所述耦合电感的另一端接地。
  7. 根据权利要求2所述的一种电压跟踪二级驱动电路，其中，所述滤波单元包括第一电阻、第二电阻、第三电阻、第一电容以及第二电容，所述第一电阻的一端与所述第一控制单元连接，所述第一电阻的另一端分别与所述第二电阻的一端以及所述第一电容的一端连接，所述第二电阻的另一端分别与所述第三电阻的一端以及所述第二电容的一端连接，所述第三电阻的另一端与所述升压模块的受控端连接，所述第一电容的另一端以及所述第二电容的另一端接地。
  8. 根据权利要求1所述的一种电压跟踪二级驱动电路，其中，所述第一电压检测模块包括第二二极管、第三电容、第四电阻以及第五电阻，所述第二二极管的阳极与所述升压模块的输入端连接，所述第二二极管的阴极分别与所述第三电容的一端以及所述第四电阻的一端连接，所述第四电阻的另一端分别与所述第五电阻的一端以及所述反馈控制模块连接，所述第三电容的另一端以及所述第五电阻的另一端接地。
  9. 根据权利要求1所述的一种电压跟踪二级驱动电路，其中，所述第二电压检测模块包括第六电阻以及第七电阻，所述第六电阻的一端与所述升压模块的输出端连接，所述第六电阻的另一端分别与所述反馈控制模块以及所述第七电阻的一端连接，所述第七电阻的另一端接地。
  10. 照明装置，包括：如权利要求1至9任一权利要求所述的一种电压跟踪二级驱动电路，还包括照明件，所述调压模块的输出端与所述照明件连接。
PCT/CN2025/087846 2024-04-08 2025-04-08 一种电压跟踪二级驱动电路及照明装置 Pending WO2025214367A1 (zh)

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