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CN107492865A - A kind of alternating current power failure response circuit and electric equipment - Google Patents

A kind of alternating current power failure response circuit and electric equipment Download PDF

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Publication number
CN107492865A
CN107492865A CN201710718826.5A CN201710718826A CN107492865A CN 107492865 A CN107492865 A CN 107492865A CN 201710718826 A CN201710718826 A CN 201710718826A CN 107492865 A CN107492865 A CN 107492865A
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module
llc
pfc
power supply
power
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CN107492865B (en
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鲍晓杰
陈水华
杨洋
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Shenzhen Skyworth RGB Electronics Co Ltd
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Shenzhen Skyworth RGB Electronics Co Ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/24Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage

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Abstract

本发明实施例公开了一种交流掉电响应电路和电器设备,其中,交流掉电响应电路包括PFC控制模块、大电解模块、LLC控制模块、LLC变压器、供电模块和掉电响应模块。掉电响应模块与PFC控制模块的功能输出端及LLC控制模块相连,PFC控制模块接入交流电源,当掉电响应模块通过PFC控制模块的功能输出端的脉冲信号改变,确定交流电源掉电时,控制LLC控制模块停止工作,进而控制控制LLC变压器停止工作,控制电源指示灯熄灭不工作,实现在电器设备接入的交流电掉电时,能够及时停止工作并准确反馈给用户。

The embodiment of the invention discloses an AC power failure response circuit and electrical equipment, wherein the AC power failure response circuit includes a PFC control module, a large electrolysis module, an LLC control module, an LLC transformer, a power supply module and a power failure response module. The power-down response module is connected to the function output terminal of the PFC control module and the LLC control module, and the PFC control module is connected to the AC power supply. When the power-down response module changes the pulse signal of the function output terminal of the PFC control module to determine that the AC power supply is powered off, Control the LLC control module to stop working, and then control and control the LLC transformer to stop working, control the power indicator light to go out and not work, so that when the AC power connected to the electrical equipment is cut off, it can stop working in time and give accurate feedback to the user.

Description

一种交流电掉电响应电路和电器设备An alternating current power failure response circuit and electrical equipment

技术领域technical field

本发明实施例涉及电变量检测技术领域,尤其涉及一种交流电掉电响应电路和电器设备。Embodiments of the present invention relate to the technical field of electric variable detection, and in particular to an AC power failure response circuit and electrical equipment.

背景技术Background technique

目前市面上多数家电产品内部都会使用AC-DC,DC-DC架构的电源,在交流电源掉电时,通常会立即停止电器设备内部芯片的工作,且以外设指示灯的熄灭来体现出掉电,但是,也存在一些特殊的电器设备电源管理机制,使得难以满足上述要求。At present, most home appliances on the market use AC-DC and DC-DC power supplies internally. When the AC power fails, the internal chips of the electrical equipment will usually stop working immediately, and the peripheral indicator lights will go out to reflect the power failure. , However, there are also some special power management mechanisms for electrical equipment, making it difficult to meet the above requirements.

图1所示为现有技术中一种电器设备所使用电源管理模块的结构示意图,该电源管理模块包括交流电接口、整流滤波电路、大电解电容、控制电路、变压器和输出整流电路。FIG. 1 is a schematic structural diagram of a power management module used in an electrical device in the prior art. The power management module includes an AC interface, a rectification and filtering circuit, a large electrolytic capacitor, a control circuit, a transformer and an output rectification circuit.

当该电器设备通过交流电接口输入交流电(Alternating Current,AC)正常工作时,大电解电容存储电能;当输入的交流电掉电时,大电解电容释放的电能,继续为控制电路提供工作电压,维持控制电路继续工作,进而控制变压器继续工作,将大电解电容释放的电能转换,通过输出整流电路输出电压,使电器设备的芯片和电源指示灯继续工作,电源指示灯继续工作持续时长可达48秒。这给用户造成电器设备输入的交流电还没有掉电的假象,让用户难以判断电器设备是否关机,影响用户对电器设备的使用体验。When the electrical equipment inputs AC (Alternating Current, AC) through the AC interface to work normally, the large electrolytic capacitor stores electric energy; when the input AC power fails, the electric energy released by the large electrolytic capacitor continues to provide operating voltage for the control circuit and maintain control The circuit continues to work, and then controls the transformer to continue to work, converts the electric energy released by the large electrolytic capacitor, and outputs the voltage through the output rectification circuit, so that the chip of the electrical equipment and the power indicator light continue to work, and the power indicator light continues to work for up to 48 seconds. This creates a false impression for the user that the alternating current input by the electrical equipment has not been powered off, making it difficult for the user to judge whether the electrical equipment is turned off, and affecting the user's experience in using the electrical equipment.

发明内容Contents of the invention

为解决相关技术问题,本发明实施例提供一种交流电掉电响应电路和电器设备,以实现在电器设备接入的交流电掉电时,能够及时停止工作并准确反馈给用户。In order to solve related technical problems, embodiments of the present invention provide an AC power failure response circuit and electrical equipment, so that when the AC power connected to the electrical equipment loses power, it can stop working in time and give accurate feedback to the user.

为实现上述目的,本发明实施例采用如下技术方案:In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:

第一方面,本发明实施例提供一种交流电掉电响应电路,包括PFC控制模块、大电解模块、LLC控制模块、LLC变压器和供电模块,所述电路还包括掉电响应模块,其中;In the first aspect, an embodiment of the present invention provides an AC power failure response circuit, including a PFC control module, a large electrolysis module, an LLC control module, an LLC transformer, and a power supply module, and the circuit also includes a power failure response module, wherein;

所述PFC控制模块,分别与所述大电解模块及供电模块相连,用于接入交流电源并进行功率因数校正处理,对所述大电解模块进行充电,所述PFC控制模块的功能输出端用于在所述交流电源掉电时改变所输出的脉冲信号;The PFC control module is connected to the large electrolysis module and the power supply module respectively, and is used to connect to an AC power supply and perform power factor correction processing to charge the large electrolysis module. The functional output terminal of the PFC control module is used for changing the output pulse signal when the AC power supply is powered off;

所述掉电响应模块,分别与所述PFC控制模块的功能输出端和LLC控制模块相连,用于在所述功能输出端的脉冲信号改变时确认所述交流电源掉电,并控制所述LLC控制模块停止工作;The power-down response module is connected to the function output terminal of the PFC control module and the LLC control module respectively, and is used to confirm that the AC power supply is powered off when the pulse signal of the function output terminal changes, and to control the LLC control module. The module stops working;

所述LLC控制模块,分别与所述LLC变压器及供电模块相连,当所述LLC控制模块停止工作时,控制所述LLC变压器停止工作;The LLC control module is connected to the LLC transformer and the power supply module respectively, and when the LLC control module stops working, controls the LLC transformer to stop working;

所述供电模块,与所述LLC变压器相连,用于为所述PFC控制模块和LLC控制模块提供供电电压;The power supply module is connected to the LLC transformer, and is used to provide a power supply voltage for the PFC control module and the LLC control module;

所述LLC变压器,与电源指示灯相连,当所述LLC变压器停止工作时,控制所述电源指示灯熄灭。The LLC transformer is connected with the power indicator light, and when the LLC transformer stops working, the power indicator light is controlled to go out.

优选的,所述PFC控制模块包括PFC控制芯片;Preferably, the PFC control module includes a PFC control chip;

所述PFC控制模块的功能输出端为所述PFC控制芯片的驱动引脚,在交流电源掉电时,所述PFC控制芯片的驱动引脚输出低电平信号。The functional output terminal of the PFC control module is the drive pin of the PFC control chip, and when the AC power supply is cut off, the drive pin of the PFC control chip outputs a low-level signal.

优选的,所述LLC控制模块包括LLC控制芯片;Preferably, the LLC control module includes an LLC control chip;

所述掉电响应模块与所述LLC控制芯片的采样感应电压输入引脚相连,具体用于根据接入的所述低电平信号,拉低所述LLC控制芯片的采样感应电压输入引脚上的采样电压,当所述采样电压小于设定电压时,所述LLC控制芯片停止工作。The power-down response module is connected to the sampling induction voltage input pin of the LLC control chip, and is specifically used to pull down the sampling induction voltage input pin of the LLC control chip according to the connected low level signal. When the sampling voltage is lower than the set voltage, the LLC control chip stops working.

优选的,所述掉电响应模块包括电阻R21、电阻R22、电阻R23、二极管D4、三极管Q3和电容C4;Preferably, the power-down response module includes a resistor R21, a resistor R22, a resistor R23, a diode D4, a transistor Q3 and a capacitor C4;

所述电阻R22的第一端与所述PDF控制芯片的驱动引脚相连,第二端与所述二极管D4的正极相连;所述二极管D4的负极分别与所述电容C4的第一端、所述电阻R23的第一端以及所述三极管Q3的基极相连;所述三极管Q3的集电极分别与所述电容C4的第二端以及所述电阻R23的第二端相连,并接地,所述三极管Q3的发射极与所述电阻R21的第一端相连;所述电阻R21的第二端与所述LLC控制芯片的采样感应电压输入引脚相连。The first end of the resistor R22 is connected to the drive pin of the PDF control chip, and the second end is connected to the anode of the diode D4; the cathode of the diode D4 is respectively connected to the first end of the capacitor C4, the The first end of the resistor R23 is connected to the base of the transistor Q3; the collector of the transistor Q3 is connected to the second end of the capacitor C4 and the second end of the resistor R23 respectively, and grounded, the The emitter of the transistor Q3 is connected to the first end of the resistor R21; the second end of the resistor R21 is connected to the sampling induced voltage input pin of the LLC control chip.

优选的,所述电阻R21的阻值为0Ω,所述电阻R22的阻值为330Ω,所述电阻R23的阻值为10MΩ,所述电容C4的容值为680pF,所述三极管Q3的型号为MMBT4403LT1。Preferably, the resistance value of the resistor R21 is 0Ω, the resistance value of the resistor R22 is 330Ω, the resistance value of the resistor R23 is 10MΩ, the capacitance value of the capacitor C4 is 680pF, and the model of the transistor Q3 is MMBT4403LT1.

优选的,所述PFC控制模块还包括PFC控制单元,所述PFC控制单元包括电感器,所述PFC控制芯片的型号为TEA88182T/1J,工作频率为120KHZ;Preferably, the PFC control module further includes a PFC control unit, the PFC control unit includes an inductor, the model of the PFC control chip is TEA88182T/1J, and the working frequency is 120KHZ;

所述PFC控制单元与所述PFC控制芯片的驱动引脚相连,通过所述电感器分别与所述交流电源、供电模块及所述PFC芯片的退磁检测引脚相连,用于当所述交流电源掉电时,通过所述电感器控制所述PFC控制芯片停止工作。The PFC control unit is connected to the driving pin of the PFC control chip, and is connected to the demagnetization detection pin of the AC power supply, the power supply module, and the PFC chip through the inductor, and is used for when the AC power supply When the power is off, the inductor is used to control the PFC control chip to stop working.

优选的,所述LLC控制模块还包括LLC控制单元,所述LLC控制芯片的型号为TEA88181T/1Y;Preferably, the LLC control module further includes an LLC control unit, and the model of the LLC control chip is TEA88181T/1Y;

所述LLC控制单元分别与所述大电解模块、LLC变压器以及所述LLC控制芯片的驱动引脚相连,用于当所述LLC控制芯片停止工作时,控制所述LLC变压器停止工作。The LLC control unit is respectively connected to the driving pins of the large electrolysis module, the LLC transformer and the LLC control chip, and is used to control the LLC transformer to stop working when the LLC control chip stops working.

优选的,所述电路还包括:Preferably, the circuit also includes:

整流滤波模块,接入所述交流电源,与所述PFC控制模块相连,用于将交流电转换成直流电;A rectifying and filtering module connected to the AC power supply and connected to the PFC control module for converting AC power into DC power;

PFC采样模块,接入PFC电压,与所述LLC控制芯片的采样感应电压输入引脚输相连,用于对所述PFC电压进行分压采样,向所述采样感应电压输入引脚提供所述采样电压;The PFC sampling module is connected to the PFC voltage, and is connected with the sampling induction voltage input pin of the LLC control chip, and is used to divide the pressure sampling of the PFC voltage, and provide the sampling to the sampling induction voltage input pin. Voltage;

输出整流模块,分别与机芯及所述LLC变压器相连,用于,当所述LLC变压器停止工作时,停止向所述机芯输出电压,使得与所述机芯相连的所述电源指示灯停止工作。The output rectifier module is connected to the core and the LLC transformer respectively, and is used to stop outputting voltage to the core when the LLC transformer stops working, so that the power indicator light connected to the core stops Work.

优选的,所述整流滤波模块包括滤波单元和整流单元;Preferably, the rectification and filtering module includes a filtering unit and a rectification unit;

所述滤波单元,接入所述交流电源,与所述整流单元相连,用于对接入的交流电进行滤波处理;The filter unit is connected to the AC power supply and connected to the rectification unit, and is used to filter the connected AC power;

所述整流单元,分别与所述滤波单元和所述PFC控制模块相连,用于将滤波处理后的交流电转换成直流电。The rectification unit is connected to the filter unit and the PFC control module respectively, and is used to convert the filtered alternating current into direct current.

第二方面,本发明实施例还提供一种电器设备,包括电源,所述电源包括如前述第一方面所述的交流电掉电响应电路。In a second aspect, an embodiment of the present invention further provides an electrical device, including a power supply, and the power supply includes the AC power failure response circuit as described in the aforementioned first aspect.

本发明实施例提供的技术方案带来的有益效果:Beneficial effects brought by the technical solutions provided by the embodiments of the present invention:

本发明实施例提供一种交流电掉电响应电路和电器设备,其中,交流电掉电响应电路包括PFC控制模块、大电解模块、LLC控制模块、LLC变压器、供电模块和掉电响应模块,掉电响应模块与PFC控制模块的功能输出端及LLC控制模块相连,PFC控制模块接入交流电源,当掉电响应模块通过PFC控制模块的功能输出端的脉冲信号改变,确定交流电源掉电时,控制LLC控制模块停止工作,进而控制控制LLC变压器停止工作,控制电源指示灯熄灭不工作,实现在电器设备接入的交流电掉电时,能够及时停止工作并准确反馈给用户。Embodiments of the present invention provide an AC power failure response circuit and electrical equipment, wherein the AC power failure response circuit includes a PFC control module, a large electrolysis module, an LLC control module, an LLC transformer, a power supply module, and a power failure response module. The module is connected to the function output terminal of the PFC control module and the LLC control module. The PFC control module is connected to the AC power supply. When the power failure response module changes the pulse signal through the function output terminal of the PFC control module and determines that the AC power supply is powered off, it controls the LLC control module. The module stops working, and then controls and controls the LLC transformer to stop working, and controls the power indicator light to go out and not work, so that when the AC power connected to the electrical equipment fails, it can stop working in time and give accurate feedback to the user.

附图说明Description of drawings

为了更清楚地说明本发明实施例中的技术方案,下面将对本发明实施例描述中所需要使用的附图作简单的介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,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,还可以根据本发明实施例的内容和这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to the content of the embodiment of the present invention and these drawings without any creative effort.

图1是现有技术中一种电器设备所使用电源管理模块的结构示意图;FIG. 1 is a schematic structural diagram of a power management module used in an electrical device in the prior art;

图2是本发明实施例提供的一种交流电掉电响应电路的结构示意图;2 is a schematic structural diagram of an AC power failure response circuit provided by an embodiment of the present invention;

图3是本发明实施例提供的另一种交流电掉电响应电路的结构示意图;3 is a schematic structural diagram of another AC power failure response circuit provided by an embodiment of the present invention;

图4是本发明实施例提供的一种交流电掉电响应电路的部分电路图;Fig. 4 is a partial circuit diagram of an AC power failure response circuit provided by an embodiment of the present invention;

图5是本发明实施例提供的一种交流电掉电响应电路的部分电路图;5 is a partial circuit diagram of an AC power failure response circuit provided by an embodiment of the present invention;

图6是本发明实施例提供的一种电器设备的示意图。Fig. 6 is a schematic diagram of an electrical device provided by an embodiment of the present invention.

具体实施方式detailed description

为使本发明解决的技术问题、采用的技术方案和达到的技术效果更加清楚,下面将结合附图对本发明实施例的技术方案作进一步的详细描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域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,都属于本发明保护的范围。In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only the technical solutions of the present invention. Some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

请参考图2至图5,其中,图4和图5中的六边形表示连接网点,名称相同的六边形表示同一连接网点,图4和图5中的电路通过连接网点GATEPFC相连。Please refer to Fig. 2 to Fig. 5, wherein, the hexagons in Fig. 4 and Fig. 5 represent connection points, and the hexagons with the same name represent the same connection point, and the circuits in Fig. 4 and Fig. 5 are connected through the connection point GATEPFC.

为实现在电器设备接入的交流电掉电时,能够及时停止工作并准确反馈给用户,在本发明的一个实施例中,提供一种交流电掉电响应电路,包括PFC(Power FactorCorrection,功率因数校正)控制模块3、大电解模块4、LLC控制模块5、LLC变压器(T1)7、供电模块8和掉电响应模块6,其中;In order to realize that when the AC power connected to the electrical equipment fails, it can stop working in time and give accurate feedback to the user. In one embodiment of the present invention, an AC power failure response circuit is provided, including a PFC (Power FactorCorrection, power factor correction ) control module 3, large electrolysis module 4, LLC control module 5, LLC transformer (T1) 7, power supply module 8 and power failure response module 6, wherein;

PFC控制模块3,分别与大电解模块4及供电模块8相连,用于接入交流电源1并进行功率因数校正处理,对大电解模块4进行充电,PFC控制模块3的功能输出端用于在交流电源1掉电时改变所输出的脉冲信号;The PFC control module 3 is connected to the large electrolysis module 4 and the power supply module 8 respectively, and is used to connect to the AC power supply 1 and perform power factor correction processing to charge the large electrolysis module 4. The functional output terminal of the PFC control module 3 is used for Change the output pulse signal when the AC power supply 1 is powered off;

掉电响应模块6,分别与PFC控制模块3的功能输出端和LLC控制模块5相连,用于在功能输出端的脉冲信号改变时确认交流电源1掉电,并控制LLC控制模块5停止工作;The power failure response module 6 is connected to the function output terminal of the PFC control module 3 and the LLC control module 5 respectively, and is used to confirm the power failure of the AC power supply 1 when the pulse signal of the function output terminal changes, and to control the LLC control module 5 to stop working;

LLC控制模块5,分别与LLC变压器7及供电模块8相连,当LLC控制模块5停止工作时,控制LLC变压器7停止工作;The LLC control module 5 is connected to the LLC transformer 7 and the power supply module 8 respectively, and when the LLC control module 5 stops working, controls the LLC transformer 7 to stop working;

供电模块8,与LLC变压器7相连,用于为PFC控制模块3和LLC控制模块5提供供电电压;The power supply module 8 is connected to the LLC transformer 7, and is used to provide a power supply voltage for the PFC control module 3 and the LLC control module 5;

LLC变压器7,与电源指示灯相连,当LLC变压器7停止工作时,控制电源指示灯熄灭。The LLC transformer 7 is connected with the power indicator light, and when the LLC transformer 7 stops working, the control power indicator light goes out.

在本实施例中,掉电响应模块6与PFC控制模块3的功能输出端及LLC控制模块5相连,PFC控制模块3接入交流电源1,当掉电响应模块6通过PFC控制模块3的功能输出端的脉冲信号改变,确定交流电源1掉电时,控制LLC控制模块5停止工作,进而控制控制LLC变压器7停止工作,控制电源指示灯熄灭不工作,实现在电器设备接入的交流电掉电时,能够及时停止工作并准确反馈给用户。In this embodiment, the power-down response module 6 is connected to the function output terminal of the PFC control module 3 and the LLC control module 5, and the PFC control module 3 is connected to the AC power supply 1. When the power-down response module 6 passes the function of the PFC control module 3 The pulse signal at the output end changes, and when it is determined that the AC power supply 1 is powered off, the LLC control module 5 is controlled to stop working, and then the LLC transformer 7 is controlled to stop working, and the indicator light of the control power supply is turned off and does not work, so that when the AC power connected to the electrical equipment is powered off , can stop working in time and give accurate feedback to the user.

在上述实施例的基础上,PFC控制模块3包括PFC控制芯片(U5)32;On the basis of the foregoing embodiments, the PFC control module 3 includes a PFC control chip (U5) 32;

PFC控制模块3的功能输出端为PFC控制芯片32的驱动引脚1,在交流电源1掉电时,PFC控制芯片32的驱动引脚1输出低电平信号。The functional output terminal of the PFC control module 3 is the drive pin 1 of the PFC control chip 32 , and when the AC power supply 1 is powered off, the drive pin 1 of the PFC control chip 32 outputs a low-level signal.

在本实施例中,PFC控制芯片32的驱动引脚1输出的脉冲信号为高电平信号和低电平信号,交流电源1掉电之前,PFC控制芯片32的驱动引脚1输出脉冲信号,当交流电源1掉电时,PFC控制芯片32的驱动引脚1仅输出低电平信号,PFC控制芯片32通过驱动引脚1输出信号的变化来体现交流电源1掉电这一状态变化。PFC控制芯片32的驱动引脚1输出低电平信号传输给掉电响应模块6。In this embodiment, the pulse signal output by the drive pin 1 of the PFC control chip 32 is a high-level signal and a low-level signal. Before the AC power supply 1 is powered off, the drive pin 1 of the PFC control chip 32 outputs a pulse signal. When the AC power supply 1 is powered off, the driving pin 1 of the PFC control chip 32 only outputs a low-level signal, and the PFC control chip 32 reflects the state change of the AC power supply 1 power-off by changing the output signal of the driving pin 1 . The drive pin 1 of the PFC control chip 32 outputs a low-level signal and transmits it to the power-down response module 6 .

在上述实施例的基础上,LLC控制模块5包括LLC控制芯片(U6)52;On the basis of the foregoing embodiments, the LLC control module 5 includes an LLC control chip (U6) 52;

掉电响应模块6与LLC控制芯片52的采样感应电压输入引脚16相连,具体用于根据接入的低电平信号,拉低LLC控制芯片52的采样感应电压输入引脚16上的采样电压,当采样电压小于设定电压时,LLC控制芯片52停止工作。The power-down response module 6 is connected to the sampling induced voltage input pin 16 of the LLC control chip 52, specifically for pulling down the sampling voltage on the sampling induced voltage input pin 16 of the LLC control chip 52 according to the connected low level signal , when the sampling voltage is lower than the set voltage, the LLC control chip 52 stops working.

在本实施例中,交流电源1掉电时,即使大电解模块4放电,由于掉电响应模块6接入PFC控制芯片32的驱动引脚1输出的低电平信号,会迅速拉低LLC控制芯片52的采样感应电压输入引脚16上的采样电压,当拉低采样电压低于设定电压(保护电压)时,LLC控制芯片52就会停止工作,进而孔LLC变压器7停止工作,实现对交流电源1掉电的快速响应。In this embodiment, when the AC power supply 1 is powered off, even if the large electrolysis module 4 is discharged, the low-level signal output by the drive pin 1 of the PFC control chip 32 connected to the power-down response module 6 will quickly pull down the LLC control The sampling induced voltage of the chip 52 inputs the sampling voltage on the pin 16. When the sampling voltage is lower than the set voltage (protection voltage), the LLC control chip 52 will stop working, and then the hole LLC transformer 7 will stop working, realizing the Fast Response to AC Power 1 Power Loss.

需要说明的是,如现有技术中,如果缺少掉电响应模块6,当交流电源1掉电时,大电解模块4开始放电,维持LLC控制芯片52的采样感应电压输入引脚16上的采样电压高于保护电压,LLC控制芯片52将继续工作,持续到大电解模块4放电完毕才停止工作,也即LLC控制芯片52需延时一段时间才能响应交流电源1掉电。It should be noted that, as in the prior art, if the power failure response module 6 is lacking, when the AC power supply 1 loses power, the large electrolysis module 4 starts to discharge, and maintains the sampling voltage on the sampling induced voltage input pin 16 of the LLC control chip 52. If the voltage is higher than the protection voltage, the LLC control chip 52 will continue to work until the discharge of the large electrolysis module 4 is completed, that is, the LLC control chip 52 needs to delay for a period of time to respond to the power failure of the AC power supply 1.

在上述实施例的基础上,掉电响应模块6包括电阻R21、电阻R22、电阻R23、二极管D4、三极管Q3和电容C4;On the basis of the above embodiments, the power-down response module 6 includes a resistor R21, a resistor R22, a resistor R23, a diode D4, a transistor Q3 and a capacitor C4;

电阻R22的第一端与PDF控制芯片的驱动引脚1相连,第二端与二极管D4的正极相连;二极管D4的负极分别与电容C4的第一端、电阻R23的第一端以及三极管Q3的基极B相连;三极管Q3的集电极C分别与电容C4的第二端以及电阻R23的第二端相连,并接地,三极管Q3的发射极E与电阻R21的第一端相连;电阻R21的第二端与LLC控制芯片52的采样感应电压输入引脚16相连。The first end of the resistor R22 is connected to the drive pin 1 of the PDF control chip, and the second end is connected to the anode of the diode D4; the cathode of the diode D4 is respectively connected to the first end of the capacitor C4, the first end of the resistor R23 and the transistor Q3. The base B is connected; the collector C of the transistor Q3 is connected with the second end of the capacitor C4 and the second end of the resistor R23 respectively, and grounded, and the emitter E of the transistor Q3 is connected with the first end of the resistor R21; the first end of the resistor R21 The two terminals are connected to the sampling induced voltage input pin 16 of the LLC control chip 52 .

进一步的,电阻R21的阻值为0Ω,电阻R22的阻值为330Ω,电阻R23的阻值为10MΩ,电容C4的容值为680pF,三极管Q3的型号为MMBT4403LT1。Further, the resistance value of the resistor R21 is 0Ω, the resistance value of the resistor R22 is 330Ω, the resistance value of the resistor R23 is 10MΩ, the capacitance value of the capacitor C4 is 680pF, and the model of the transistor Q3 is MMBT4403LT1.

进一步的,PFC控制模块3还包括PFC控制单元31,PFC控制单元31包括电感器L1D1,PFC控制芯片32的型号为TEA88182T/1J,工作频率为120KHZ;Further, the PFC control module 3 also includes a PFC control unit 31, the PFC control unit 31 includes an inductor L1D1, the type of the PFC control chip 32 is TEA88182T/1J, and the working frequency is 120KHZ;

PFC控制单元31与PFC控制芯片32的驱动引脚1相连,通过电感器L1D1分别与交流电源1、供电模块8及PFC芯片的退磁检测引脚8相连,用于当交流电源1掉电时,通过电感器L1D1控制PFC控制芯片32停止工作;The PFC control unit 31 is connected to the driving pin 1 of the PFC control chip 32, and is connected to the demagnetization detection pin 8 of the AC power supply 1, the power supply module 8 and the PFC chip through the inductor L1D1, for when the AC power supply 1 is powered off, Control the PFC control chip 32 to stop working through the inductor L1D1;

其中,PFC控制单元31还包括电容CX1、三极管Q4和电阻RS1,电容CX1的容值为1uF,电阻RS1的阻值为10Ω;电感器L1D1的引脚1接地,引脚3与PFC控制芯片32的退磁检测引脚8相连,引脚4与电容CX1的第一端相连,引脚6分别与大电解模块4及三极管Q4的引脚2相连;电容CX1接入交流电源1,其第二端接地;三极管Q4的引脚1通过电阻RS1与PFC控制芯片32的驱动引脚1相连。Wherein, the PFC control unit 31 also includes a capacitor CX1, a transistor Q4 and a resistor RS1, the capacitance of the capacitor CX1 is 1uF, and the resistance of the resistor RS1 is 10Ω; the pin 1 of the inductor L1D1 is grounded, and the pin 3 is connected to the PFC control chip 32 The demagnetization detection pin 8 is connected, the pin 4 is connected with the first end of the capacitor CX1, and the pin 6 is respectively connected with the large electrolytic module 4 and the pin 2 of the triode Q4; the capacitor CX1 is connected to the AC power supply 1, and its second end grounding; the pin 1 of the triode Q4 is connected to the driving pin 1 of the PFC control chip 32 through the resistor RS1.

进一步的,LLC控制模块5还包括LLC控制单元51,LLC控制芯片52的型号为TEA88181T/1Y;Further, the LLC control module 5 also includes an LLC control unit 51, and the model of the LLC control chip 52 is TEA88181T/1Y;

LLC控制单元51分别与大电解模块4、LLC变压器7以及LLC控制芯片52的驱动引脚6和9相连,用于当LLC控制芯片52停止工作时,控制LLC变压器7停止工作;The LLC control unit 51 is connected to the driving pins 6 and 9 of the large electrolysis module 4, the LLC transformer 7 and the LLC control chip 52 respectively, and is used to control the LLC transformer 7 to stop working when the LLC control chip 52 stops working;

其中,LLC控制单元51包括电阻RS2、电阻RS3、三极管Q7、三极管Q8和电容C24,电阻RS2和电阻RS3的阻值均为10Ω,电容C24的容值为470pF;三极管Q7的引脚1通过电阻RS2与LLC控制芯片52的驱动引脚6相连,引脚2分别与LLC控制芯片52的引脚11及LLC变压器7的引脚6相连,引脚3通过电容C24与LLC变压器7的引脚5相连,并接地;三极管Q8的引脚1通过电阻RS3与LLC控制芯片52的驱动引脚9相连,引脚2与大电解模块4相连,引脚3与三极管Q7的引脚2相连。Wherein, the LLC control unit 51 includes a resistor RS2, a resistor RS3, a transistor Q7, a transistor Q8, and a capacitor C24. The resistance values of the resistor RS2 and the resistor RS3 are both 10Ω, and the capacitance of the capacitor C24 is 470pF; the pin 1 of the transistor Q7 passes through the resistor RS2 is connected to the drive pin 6 of the LLC control chip 52, pin 2 is connected to the pin 11 of the LLC control chip 52 and the pin 6 of the LLC transformer 7 respectively, and the pin 3 is connected to the pin 5 of the LLC transformer 7 through the capacitor C24 connected and grounded; the pin 1 of the triode Q8 is connected with the driving pin 9 of the LLC control chip 52 through the resistor RS3, the pin 2 is connected with the large electrolysis module 4, and the pin 3 is connected with the pin 2 of the triode Q7.

此外,大电解模块4包括电容CE1和电容CE2,电容CE1和电容CE2的容值均为88uF,电容CE1和电容CE2并联的第一端接地,第二端接入PFC电压,并分别与三极管Q4的引脚2和三极管Q8的引脚2相连;交流电源1上电时大电解模块4充电,交流电源1掉电时大电解模块4放电。供电模块8包括电容C13、二极管ZD5、二极管ZD4、电容CE14、二极管D8和二极管D9,电容C13的容值为100nF,二极管ZD5和二极管ZD4的稳压值均为27V,电容CE14的容值为470uF,二极管D8和二极管D9的型号均为BA158,电容C13、二极管ZD5、二极管ZD4和电容CE14依次并联,并联的第一端分别与PFC控制芯片32的供电引脚4和LLC控制芯片52的供电引脚1相连,并联的第二端分别与二极管D8的负极及二极管D9的负极相连,二极管D8的正极及二极管D9的正极相连,并与LLC变压器7的引脚2和引脚3相连;供电模块8通过PFC控制芯片32的供电引脚4和LLC控制芯片52的供电引脚1,分别为PFC控制芯片32及LLC控制芯片52提供供电电压VCC。In addition, the large electrolysis module 4 includes a capacitor CE1 and a capacitor CE2, both of which have a capacitance of 88uF. The first end of the parallel connection of the capacitor CE1 and the capacitor CE2 is grounded, and the second end is connected to the PFC voltage, and connected to the transistor Q4 respectively. The pin 2 of the transistor Q8 is connected to the pin 2 of the triode Q8; the large electrolysis module 4 is charged when the AC power supply 1 is powered on, and the large electrolysis module 4 is discharged when the AC power supply 1 is powered off. The power supply module 8 includes a capacitor C13, a diode ZD5, a diode ZD4, a capacitor CE14, a diode D8 and a diode D9. The capacitance of the capacitor C13 is 100nF, the voltage regulation value of the diode ZD5 and the diode ZD4 are both 27V, and the capacitance of the capacitor CE14 is 470uF , the models of diode D8 and diode D9 are both BA158, capacitor C13, diode ZD5, diode ZD4 and capacitor CE14 are connected in parallel in turn, and the first end of the parallel connection is respectively connected to the power supply pin 4 of the PFC control chip 32 and the power supply pin of the LLC control chip 52. The pin 1 is connected, and the second end of the parallel connection is respectively connected with the cathode of the diode D8 and the cathode of the diode D9, the anode of the diode D8 is connected with the anode of the diode D9, and is connected with the pin 2 and the pin 3 of the LLC transformer 7; the power supply module 8. Through the power supply pin 4 of the PFC control chip 32 and the power supply pin 1 of the LLC control chip 52, provide the power supply voltage VCC for the PFC control chip 32 and the LLC control chip 52 respectively.

进一步的,本实施例的电路还包括:Further, the circuit of this embodiment also includes:

整流滤波模块2,接入交流电源1,与PFC控制模块3相连,用于将交流电转换成直流电;The rectifying and filtering module 2 is connected to the AC power supply 1 and connected to the PFC control module 3 for converting the alternating current into direct current;

PFC采样模块9,接入PFC电压,与LLC控制芯片52的采样感应电压输入引脚输16相连,用于对PFC电压进行分压采样,向采样感应电压输入引脚16提供采样电压;其中,PFC采样模块9包括电阻R24、电阻R25、电阻R26、电阻R27、电阻R28和电阻R29,电阻R24、电阻R25、和电阻R26的阻值均为4.7MΩ,电阻R27和电阻R28的阻值均为2.2MΩ,电阻R29的阻值为120KΩ,电阻R24、电阻R25、电阻R26、电阻R27、电阻R28和电阻R29依次串联,电阻R24的一端接入PFC电压,电阻R29的一端接地,另一端与LLC控制芯片52的采样感应电压输入引脚16相连。The PFC sampling module 9 is connected to the PFC voltage, and is connected with the sampling induction voltage input pin 16 of the LLC control chip 52, and is used to divide and sample the PFC voltage, and provides sampling voltage to the sampling induction voltage input pin 16; wherein, PFC sampling module 9 includes resistance R24, resistance R25, resistance R26, resistance R27, resistance R28 and resistance R29, the resistance value of resistance R24, resistance R25 and resistance R26 is 4.7MΩ, the resistance value of resistance R27 and resistance R28 is 2.2MΩ, the resistance value of resistor R29 is 120KΩ, resistor R24, resistor R25, resistor R26, resistor R27, resistor R28 and resistor R29 are connected in series in sequence, one end of resistor R24 is connected to PFC voltage, one end of resistor R29 is grounded, and the other end is connected to LLC The sampling induced voltage input pin 16 of the control chip 52 is connected.

输出整流模块10,分别与机芯及LLC变压器7相连,用于当LLC变压器7停止工作时,停止向机芯输出电压,使得与机芯相连的电源指示灯停止工作。其中,输出整流模块10与LLC变压器7的引脚7、引脚8、引脚9、引脚10、引脚11和引脚12相连。The output rectification module 10 is connected to the core and the LLC transformer 7 respectively, and is used to stop outputting voltage to the core when the LLC transformer 7 stops working, so that the power indicator light connected to the core stops working. Wherein, the output rectification module 10 is connected with the pin 7 , the pin 8 , the pin 9 , the pin 10 , the pin 11 and the pin 12 of the LLC transformer 7 .

进一步的,整流滤波模块2包括滤波单元和整流单元;Further, the rectification and filtering module 2 includes a filtering unit and a rectification unit;

滤波单元,接入交流电源1,与整流单元相连,用于对接入的交流电进行滤波处理;The filter unit is connected to the AC power supply 1 and connected to the rectifier unit, and is used for filtering the connected AC power;

整流单元,分别与滤波单元和PFC控制模块3相连,用于将滤波处理后的交流电转换成直流电;其中,整流单元包括整流桥BD1,整流桥BD1的引脚1与电感器L1D1的引脚4相连,引脚2与交流电源1插座LZ的引脚2相连,引脚3与交流电源1插座LZ的引脚1相连,引脚4与电容CX1的第二端相连。The rectification unit is connected to the filter unit and the PFC control module 3 respectively, and is used to convert the filtered alternating current into direct current; wherein, the rectification unit includes a rectifier bridge BD1, pin 1 of the rectifier bridge BD1 and pin 4 of the inductor L1D1 The pin 2 is connected to the pin 2 of the socket LZ of the AC power supply 1, the pin 3 is connected to the pin 1 of the socket LZ of the AC power supply 1, and the pin 4 is connected to the second end of the capacitor CX1.

此外,交流电源1插座LZ接上插头CN1时,为电路上电,拔下插头CN1时,交流电源1掉电。In addition, when the socket LZ of the AC power source 1 is connected to the plug CN1, the circuit is powered on, and when the plug CN1 is pulled out, the AC power source 1 is powered off.

在本实施例中,LLC控制芯片52的工作电压在13V~27V之间,工作电压范围较宽,正常工作时设置工作电压为22V,采样感应电压输入引脚16的工作电压为2.5V,如果该引脚的电压被拉低,且低于保护电压(1.6V)时,LLC控制芯片52停止工作。In this embodiment, the operating voltage of the LLC control chip 52 is between 13V and 27V, and the operating voltage range is relatively wide. During normal operation, the operating voltage is set to 22V, and the operating voltage of the sampling induced voltage input pin 16 is 2.5V. If When the voltage of this pin is pulled down and is lower than the protection voltage (1.6V), the LLC control chip 52 stops working.

当交流电源1掉电,电感器L1D1将不会有电压电流输出,PFC控制芯片32通过退磁检测引脚8检测到电感器L1D1的电压不发生变化时,即使由于大电解电容CE1和CE2,以及供电模块8的电容CE14持续放电,使得PFC控制芯片32的供电电压VCC正常,也将导致PFC控制芯片32停止工作,PFC控制芯片32的驱动引脚1输出低电平信号,PNP型三极管Q3的基极B也是低电平,而此时发射极E仍然处于高于1.6V的高电平,这使得三极管Q3导通,从而迅速拉低A点电压,也即拉低LLC控制芯片52的采样感应电压输入引脚16的电压。当采样感应电压输入引脚16的电压低于1.6V时,LLC控制芯片52停止工作,无法驱动LLC变压器7继续工作,LLC变压器7的原边没有能力继续将大电解模块4放电的能量转化成12V电压传向副边供机芯使用,电源指示灯立即熄灭,实现对交流电源1掉电的快速响应,并通过电源指示灯反馈给用户。When the AC power supply 1 is powered off, the inductor L1D1 will not have voltage and current output, and the PFC control chip 32 detects that the voltage of the inductor L1D1 does not change through the demagnetization detection pin 8, even if the large electrolytic capacitors CE1 and CE2, and The capacitor CE14 of the power supply module 8 continues to discharge, so that the power supply voltage VCC of the PFC control chip 32 is normal, which will also cause the PFC control chip 32 to stop working, the drive pin 1 of the PFC control chip 32 outputs a low-level signal, and the PNP transistor Q3 The base B is also at a low level, and at this time the emitter E is still at a high level higher than 1.6V, which makes the triode Q3 conduct, thereby rapidly pulling down the voltage at point A, that is, pulling down the sampling rate of the LLC control chip 52 Sense Voltage Input pin 16 voltage. When the voltage of the sampling induced voltage input pin 16 is lower than 1.6V, the LLC control chip 52 stops working and cannot drive the LLC transformer 7 to continue working. The primary side of the LLC transformer 7 has no ability to continue converting the energy discharged by the large electrolysis module 4 into The 12V voltage is transmitted to the secondary side for the use of the movement, and the power indicator light goes out immediately, realizing a quick response to the power failure of the AC power supply 1, and feedback to the user through the power indicator light.

需要说明的是,当交流电源1重新上电,PFC控制芯片32的供电电压VCC达到19.2V时,LLC控制芯片52的采样感应电压输入引脚16的电压开始启动,此时,PFC电压不发生变化,当引脚16的电压大于1.6V时,即超过了PFC采样电路的欠压保护点,PFC电压开始上升,由320V上升至400V。在这期间,采样感应电压输入引脚16的电压继续上升,当采样感应电压输入引脚16的电压上升至2.3V时PFC启动完成,最终稳定工作时采样感应电压输入引脚16的电压为2.5V。PFC启动成功时,PFC控制芯片32的驱动引脚1输出驱动脉冲信号,驱动电压为12V,工作频率为120KHZ,相应的周期时间为0.0000083S。It should be noted that when the AC power supply 1 is powered on again and the power supply voltage VCC of the PFC control chip 32 reaches 19.2V, the voltage of the sampling induction voltage input pin 16 of the LLC control chip 52 starts to start, and at this time, the PFC voltage does not occur. Change, when the voltage of pin 16 is greater than 1.6V, that is, it exceeds the undervoltage protection point of the PFC sampling circuit, and the PFC voltage starts to rise from 320V to 400V. During this period, the voltage of the sampling induced voltage input pin 16 continues to rise. When the voltage of the sampling induced voltage input pin 16 rises to 2.3V, the PFC startup is completed, and the voltage of the sampling induced voltage input pin 16 is 2.5V when it finally works stably. V. When the PFC starts successfully, the driving pin 1 of the PFC control chip 32 outputs a driving pulse signal, the driving voltage is 12V, the working frequency is 120KHZ, and the corresponding cycle time is 0.0000083S.

当PFC控制芯片32的驱动引脚1输出高电平信号时,三极管Q3的基极B的电压为12V,要高于发射极E的电压(2.5V),所以Q3处于截止状态,不影响PFC控制芯片32和LLC控制芯片52正常工作;当PFC控制芯片32的驱动引脚1输出低电平信号时,由于掉电响应模块6中电阻R23的存在,使得电容C4放电很慢,由电阻R23和电容C4组成的RC电路的时间参数可以算出电容C4的放电时间约为0.0056S。而PFC控制芯片32的驱动引脚1输出驱动脉冲的周期时间为0.0000083S,要远远小于电容C4的放电时间,所以,能够保证在PFC控制芯片32的驱动引脚1输出低电平时,三极管Q3仍然处于截止状态,并且电容C4的容值为680pF,对驱动波形产生的影响也可以忽略不计;因此,交流电源1不掉电时,不论PFC控制芯片32输出高电平还是输出低电平,三极管Q3都处于截止状态,即掉电响应模块6并不会影响PFC控制芯片32的正常工作状态,也不影响LLC控制芯片52及LLC变压器7的正常工作状态。When the drive pin 1 of the PFC control chip 32 outputs a high-level signal, the voltage of the base B of the transistor Q3 is 12V, which is higher than the voltage of the emitter E (2.5V), so Q3 is in the cut-off state and does not affect the PFC The control chip 32 and the LLC control chip 52 work normally; when the drive pin 1 of the PFC control chip 32 outputs a low-level signal, due to the presence of the resistor R23 in the power-down response module 6, the capacitor C4 discharges very slowly, and the resistor R23 The time parameters of the RC circuit composed of the capacitor C4 can be calculated to be about 0.0056S for the discharge time of the capacitor C4. And the cycle time of the driving pin 1 of the PFC control chip 32 outputting the driving pulse is 0.0000083S, which is far less than the discharge time of the capacitor C4. Therefore, it can be guaranteed that when the driving pin 1 of the PFC control chip 32 outputs low level, the transistor Q3 is still in the cut-off state, and the capacitance value of capacitor C4 is 680pF, and the influence on the driving waveform can be ignored; therefore, when the AC power supply 1 is not powered off, no matter whether the PFC control chip 32 outputs high level or , the triode Q3 is in the cut-off state, that is, the power failure response module 6 will not affect the normal working state of the PFC control chip 32, nor will it affect the normal working state of the LLC control chip 52 and the LLC transformer 7.

综上,通过掉电响应模块6,既不会电源的稳定运行,又有效地解决了交流电源1掉电后,电器设备响应不及时,不能及时停止工作并向用户准确反馈的技术问题。To sum up, through the power failure response module 6, the stable operation of the power supply is not guaranteed, and the technical problem that the electrical equipment does not respond in time after the AC power supply 1 is powered off, and cannot stop working in time and give accurate feedback to the user is effectively solved.

请参考图6,其是本发明实施例提供的一种电器设备的示意图。Please refer to FIG. 6 , which is a schematic diagram of an electrical device provided by an embodiment of the present invention.

一种电器设备,包括电源,电源包括上述任一实施例所提供的交流电掉电响应电路。An electrical device includes a power supply, and the power supply includes the AC power failure response circuit provided by any one of the above embodiments.

优选的,该电器设备为电视机。Preferably, the electrical equipment is a TV set.

注意,上述仅为本发明的较佳实施例及所运用技术原理。本领域技术人员会理解,本发明不限于这里所述的特定实施例,对本领域技术人员来说能够进行各种明显的变化、重新调整和替代而不会脱离本发明的保护范围。因此,虽然通过以上实施例对本发明进行了较为详细的说明,但是本发明不仅仅限于以上实施例,在不脱离本发明构思的情况下,还可以包括更多其他等效实施例,而本发明的范围由所附的权利要求范围决定。Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1.一种交流电掉电响应电路,包括PFC控制模块、大电解模块、LLC控制模块、LLC变压器和供电模块,其特征在于,所述电路还包括掉电响应模块,其中;1. An AC power failure response circuit, comprising a PFC control module, a large electrolysis module, an LLC control module, an LLC transformer and a power supply module, is characterized in that the circuit also includes a power failure response module, wherein; 所述PFC控制模块,分别与所述大电解模块及供电模块相连,用于接入交流电源并进行功率因数校正处理,对所述大电解模块进行充电,所述PFC控制模块的功能输出端用于在所述交流电源掉电时改变所输出的脉冲信号;The PFC control module is connected to the large electrolysis module and the power supply module respectively, and is used to connect to an AC power supply and perform power factor correction processing to charge the large electrolysis module. The functional output terminal of the PFC control module is used for changing the output pulse signal when the AC power supply is powered off; 所述掉电响应模块,分别与所述PFC控制模块的功能输出端和LLC控制模块相连,用于在所述功能输出端的脉冲信号改变时确认所述交流电源掉电,并控制所述LLC控制模块停止工作;The power-down response module is connected to the function output terminal of the PFC control module and the LLC control module respectively, and is used to confirm that the AC power supply is powered off when the pulse signal of the function output terminal changes, and to control the LLC control module. The module stops working; 所述LLC控制模块,分别与所述LLC变压器及供电模块相连,当所述LLC控制模块停止工作时,控制所述LLC变压器停止工作;The LLC control module is connected to the LLC transformer and the power supply module respectively, and when the LLC control module stops working, controls the LLC transformer to stop working; 所述供电模块,与所述LLC变压器相连,用于为所述PFC控制模块和LLC控制模块提供供电电压;The power supply module is connected to the LLC transformer, and is used to provide a power supply voltage for the PFC control module and the LLC control module; 所述LLC变压器,与电源指示灯相连,当所述LLC变压器停止工作时,控制所述电源指示灯熄灭。The LLC transformer is connected with the power indicator light, and when the LLC transformer stops working, the power indicator light is controlled to go out. 2.如权利要求1所述的电路,其特征在于,所述PFC控制模块包括PFC控制芯片;2. The circuit according to claim 1, wherein the PFC control module comprises a PFC control chip; 所述PFC控制模块的功能输出端为所述PFC控制芯片的驱动引脚,在交流电源掉电时,所述PFC控制芯片的驱动引脚输出低电平信号。The functional output terminal of the PFC control module is the drive pin of the PFC control chip, and when the AC power supply is cut off, the drive pin of the PFC control chip outputs a low-level signal. 3.如权利要求2所述的电路,其特征在于,所述LLC控制模块包括LLC控制芯片;3. The circuit according to claim 2, wherein the LLC control module comprises an LLC control chip; 所述掉电响应模块与所述LLC控制芯片的采样感应电压输入引脚相连,具体用于根据接入的所述低电平信号,拉低所述LLC控制芯片的采样感应电压输入引脚上的采样电压,当所述采样电压小于设定电压时,所述LLC控制芯片停止工作。The power-down response module is connected to the sampling induction voltage input pin of the LLC control chip, and is specifically used to pull down the sampling induction voltage input pin of the LLC control chip according to the connected low level signal. When the sampling voltage is lower than the set voltage, the LLC control chip stops working. 4.如权利要求3所述的电路,其特征在于,所述掉电响应模块包括电阻R21、电阻R22、电阻R23、二极管D4、三极管Q3和电容C4;4. The circuit according to claim 3, wherein the power-down response module comprises a resistor R21, a resistor R22, a resistor R23, a diode D4, a transistor Q3 and a capacitor C4; 所述电阻R22的第一端与所述PDF控制芯片的驱动引脚相连,第二端与所述二极管D4的正极相连;所述二极管D4的负极分别与所述电容C4的第一端、所述电阻R23的第一端以及所述三极管Q3的基极相连;所述三极管Q3的集电极分别与所述电容C4的第二端以及所述电阻R23的第二端相连,并接地,所述三极管Q3的发射极与所述电阻R21的第一端相连;所述电阻R21的第二端与所述LLC控制芯片的采样感应电压输入引脚相连。The first end of the resistor R22 is connected to the drive pin of the PDF control chip, and the second end is connected to the anode of the diode D4; the cathode of the diode D4 is respectively connected to the first end of the capacitor C4, the The first end of the resistor R23 is connected to the base of the transistor Q3; the collector of the transistor Q3 is connected to the second end of the capacitor C4 and the second end of the resistor R23 respectively, and grounded, the The emitter of the transistor Q3 is connected to the first end of the resistor R21; the second end of the resistor R21 is connected to the sampling induced voltage input pin of the LLC control chip. 5.如权利要求4所述的电路,其特征在于,所述电阻R21的阻值为0Ω,所述电阻R22的阻值为330Ω,所述电阻R23的阻值为10MΩ,所述电容C4的容值为680pF,所述三极管Q3的型号为MMBT4403LT1。5. The circuit according to claim 4, wherein the resistance value of the resistor R21 is 0Ω, the resistance value of the resistor R22 is 330Ω, the resistance value of the resistor R23 is 10MΩ, and the resistance value of the capacitor C4 The capacitance value is 680pF, and the model of the transistor Q3 is MMBT4403LT1. 6.如权利要求3所述的电路,其特征在于,所述PFC控制模块还包括PFC控制单元,所述PFC控制单元包括电感器,所述PFC控制芯片的型号为TEA88182T/1J,工作频率为120KHZ;6. The circuit according to claim 3, wherein the PFC control module further comprises a PFC control unit, the PFC control unit comprises an inductor, the model of the PFC control chip is TEA88182T/1J, and the operating frequency is 120KHZ; 所述PFC控制单元与所述PFC控制芯片的驱动引脚相连,通过所述电感器分别与所述交流电源、供电模块及所述PFC芯片的退磁检测引脚相连,用于当所述交流电源掉电时,通过所述电感器控制所述PFC控制芯片停止工作。The PFC control unit is connected to the driving pin of the PFC control chip, and is connected to the demagnetization detection pin of the AC power supply, the power supply module, and the PFC chip through the inductor, and is used for when the AC power supply When the power is off, the inductor is used to control the PFC control chip to stop working. 7.如权利要求6所述的电路,其特征在于,所述LLC控制模块还包括LLC控制单元,所述LLC控制芯片的型号为TEA88181T/1Y;7. The circuit according to claim 6, wherein the LLC control module further comprises an LLC control unit, and the model of the LLC control chip is TEA88181T/1Y; 所述LLC控制单元分别与所述大电解模块、LLC变压器以及所述LLC控制芯片的驱动引脚相连,用于当所述LLC控制芯片停止工作时,控制所述LLC变压器停止工作。The LLC control unit is respectively connected to the driving pins of the large electrolysis module, the LLC transformer and the LLC control chip, and is used to control the LLC transformer to stop working when the LLC control chip stops working. 8.如权利要求3所述的电路,其特征在于,所述电路还包括:8. The circuit of claim 3, further comprising: 整流滤波模块,接入所述交流电源,与所述PFC控制模块相连,用于将交流电转换成直流电;A rectifying and filtering module connected to the AC power supply and connected to the PFC control module for converting AC power into DC power; PFC采样模块,接入PFC电压,与所述LLC控制芯片的采样感应电压输入引脚输相连,用于对所述PFC电压进行分压采样,向所述采样感应电压输入引脚提供所述采样电压;The PFC sampling module is connected to the PFC voltage, and is connected with the sampling induction voltage input pin of the LLC control chip, and is used to divide the pressure sampling of the PFC voltage, and provide the sampling to the sampling induction voltage input pin. Voltage; 输出整流模块,分别与机芯及所述LLC变压器相连,用于当所述LLC变压器停止工作时,停止向所述机芯输出电压,使得与所述机芯相连的所述电源指示灯停止工作。The output rectifier module is connected to the core and the LLC transformer respectively, and is used to stop outputting voltage to the core when the LLC transformer stops working, so that the power indicator light connected to the core stops working . 9.如权利要求8所述的电路,其特征在于,所述整流滤波模块包括滤波单元和整流单元;9. The circuit according to claim 8, wherein the rectification and filtering module comprises a filter unit and a rectification unit; 所述滤波单元,接入所述交流电源,与所述整流单元相连,用于对接入的交流电进行滤波处理;The filter unit is connected to the AC power supply and connected to the rectification unit, and is used to filter the connected AC power; 所述整流单元,分别与所述滤波单元和所述PFC控制模块相连,用于将滤波处理后的交流电转换成直流电。The rectification unit is connected to the filter unit and the PFC control module respectively, and is used to convert the filtered alternating current into direct current. 10.一种电器设备,包括电源,其特征在于,所述电源包括如权利要求1~9任一项所述的交流电掉电响应电路。10. An electrical device, comprising a power supply, characterized in that the power supply comprises the AC power failure response circuit according to any one of claims 1-9.
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