WO2016070484A1 - 一种反馈分离式电路及其母板和子板组合检测方法 - Google Patents

一种反馈分离式电路及其母板和子板组合检测方法 Download PDF

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WO2016070484A1
WO2016070484A1 PCT/CN2014/095341 CN2014095341W WO2016070484A1 WO 2016070484 A1 WO2016070484 A1 WO 2016070484A1 CN 2014095341 W CN2014095341 W CN 2014095341W WO 2016070484 A1 WO2016070484 A1 WO 2016070484A1
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Prior art keywords
motherboard
voltage
controller
feedback
board
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French (fr)
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陈辛洪
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/416,444 priority Critical patent/US20160132063A1/en
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current 
    • G05F1/46—Regulating voltage or current  wherein the variable actually regulated by the final control device is DC
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
    • G01R31/2813—Checking the presence, location, orientation or value, e.g. resistance, of components or conductors

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  • the present invention relates to the field of electronic circuits, and in particular, to a feedback separation circuit and a combination detection method thereof.
  • motherboard also known as a mother card, main card or motherboard
  • the motherboard and the sub-board respectively include a power layer, a ground layer and a signal layer.
  • the motherboard is generally passive and structurally fixed.
  • the daughter board is movable and electrically connected to the motherboard through a pluggable connector.
  • the assembler For having multiple motherboards at the same time (for example, motherboards A1, A2, A3, 7), the assembler assembles the motherboard and daughterboard combinations according to the preset (for example, A1-a, A2-b). 7), the corresponding daughter board is installed on the motherboard.
  • the preset for example, A1-a, A2-b.
  • a memory is added to each sub-board to be assembled with it, such as an electrically erasable programmable read-only memory EEPROM (Electrically Erasable Programmable Read-Only) Memory), after the assembly is powered up, the motherboard reads the EEPROM data, determines the daughter board connected to it at this time, and then makes the correct output.
  • EEPROM Electrically Erasable Programmable Read-Only Memory
  • One of the technical problems to be solved by the present invention is to provide a feedback separation type circuit capable of detecting a combination of a motherboard and a daughter board without increasing a large amount of cost.
  • a motherboard and daughter board combination detection method using the circuit is also provided.
  • the present invention provides a feedback adjustment separation type circuit, comprising: a motherboard, on which a controller is disposed; and a plurality of sub-boards separated from the motherboard, each of the sub-boards respectively A resistor having different resistance values is disposed, and one end of each resistor is respectively connected to the same feedback end of the controller, and the other end is grounded, wherein the control of the motherboard is performed when one of the plurality of daughter boards is powered on Comparing the voltage of the feedback terminal with one of a plurality of voltage thresholds preset by the controller to determine a daughter board currently electrically connected to the motherboard, and performing corresponding output, the number of the voltage thresholds and the daughter board The number matches.
  • the controller internally presets a protection voltage threshold, and when the voltage at the feedback terminal is greater than or equal to the protection voltage threshold, the motherboard performs voltage Protection operation.
  • a resistor is disposed on the motherboard. One end of the resistor is connected to the feedback end of the controller, and the other end is connected to a first set voltage.
  • the voltage value of the first set voltage is 5V.
  • the protection voltage threshold is 5V.
  • the motherboard is a switchboard
  • the controller is a driver IC
  • the daughter board is a liquid crystal
  • the motherboard is provided with a resistor string connected in series by two resistors, one end of the resistor string is grounded, and the other end is connected to a second set voltage, two of the resistor strings A resistor-connected node is coupled to the feedback terminal of the driver IC.
  • each of the sub-boards respectively The difference in resistance between the set resistors is 10K ⁇ .
  • a method of detecting a combination of a motherboard and a daughter board using the above-described circuit comprising the steps of: powering up one of a plurality of daughter boards; comparing controllers of the motherboard The voltage of the feedback terminal and one of a plurality of voltage thresholds preset by the controller determine a daughter board that is currently electrically connected to the motherboard, and perform corresponding output.
  • the controller of the motherboard when comparing the feedback terminal voltage to be greater than or equal to a protection voltage threshold set internally by the controller, the mother The board performs voltage protection operations.
  • the circuit of the embodiment of the present invention connects the feedback terminal of the motherboard to the resistor connected to the ground in each sub-board, and detects the voltage of the feedback terminal during power-on, and performs the voltage thresholds set in the motherboard with the plurality of voltage thresholds set in the motherboard. The comparison further determines which daughter board is currently electrically connected to the motherboard.
  • the circuit of the embodiment of the present invention can not only distinguish the connection combination of the motherboard and the daughter board, but also does not increase the excessive cost.
  • FIG. 1 is a circuit connection diagram of a prior art assembly of a motherboard and a daughter board
  • FIG. 2 is a schematic diagram of a feedback split circuit in accordance with an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a feedback split circuit in accordance with another embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a feedback split type circuit according to an embodiment of the present invention.
  • the structure constituting the circuit and the connection relationship between the structures will be described in detail below with reference to FIG.
  • the daughter board is a liquid crystal panel (C/B)
  • the motherboard is a system board.
  • the circuit arrangement shown in FIG. 2 can make the motherboard It is possible to identify liquid crystal panels with different resolutions and refresh rates (for example, resolutions of 1366X768 or 1920X1080, refresh rate of 60Hz or 120Hz) and perform different outputs.
  • resolutions and refresh rates for example, resolutions of 1366X768 or 1920X1080, refresh rate of 60Hz or 120Hz
  • refresh rate for example, resolutions of 1366X768 or 1920X1080, refresh rate of 60Hz or 120Hz
  • a resistor R_1 is reserved on the motherboard A, and the potential is pulled up to a set voltage (for example, 5V), and a resistor having different resistance values is reserved on each sub-board. And the potential of each resistor is pulled down to the ground GND.
  • the feedback terminal ADC of the microcontroller set on the motherboard A is connected to each of the resistors that are pulled down to ground.
  • a daughter board is connected to the motherboard A.
  • the ADC end of the microcontroller on the motherboard A has a voltage, and then the microcontroller on the motherboard A compares the voltage and micro-control of the ADC terminal.
  • One of a plurality of preset voltage thresholds is internally determined to determine a daughter board electrically connected to the motherboard A at this time, and corresponding output is performed.
  • the number of voltage thresholds matches the number of daughter boards. For example, if the motherboard A is connected to four daughter boards, four voltage thresholds are set corresponding to the different daughter boards.
  • the voltage value of the ADC terminal of the microcontroller is The voltage threshold preset in the microcontroller of the motherboard A includes a threshold of 4V.
  • a protection threshold may be preset in the microcontroller of the motherboard A, for example, 5V. If the voltage value of the feedback terminal ADC is greater than or equal to 5V, it is determined that the connection between the motherboard A and the daughter board is poor. At this time, the motherboard A can perform corresponding voltage protection operations.
  • the circuit of the embodiment connects the feedback terminal of the motherboard to the resistor connected to the ground in each sub-board, and detects the voltage of the feedback terminal during power-on, and compares it with a plurality of voltages set in the motherboard. The thresholds are compared to determine which daughter board is currently electrically connected to the motherboard. This embodiment not only distinguishes the connection combination of the motherboard and the daughter board, but also does not increase the excessive cost.
  • FIG. 3 is a schematic diagram of a feedback split circuit in accordance with another embodiment of the present invention, and the structure and connection of the circuit will be described in detail below with reference to FIG.
  • the daughter board is a different converter in the backlight of the liquid crystal display
  • the motherboard A is a system board, specifically a power distribution board, for each sub board.
  • the corresponding voltage VOUT is provided, and the daughter board is the load of the motherboard.
  • a resistor having a different resistance value is reserved on each sub-board, and the potential of each resistor is pulled down to the ground GND.
  • a resistor string connected in series by two resistors R_1 and R_6 is disposed on the motherboard A, a voltage input terminal is connected to one end of the R_1, and one end of the R_6 is grounded.
  • the feedback terminal FB of the power IC on the motherboard A is connected to the connected node of the two resistors R_1 and R_6.
  • the feedback terminal FB of the power IC on the motherboard A is connected in parallel with different resistors.
  • the voltage of the feedback terminal is detected and compared with a plurality of voltage thresholds set in the motherboard. The comparison further determines which daughter board is currently electrically connected to the motherboard, so the motherboard A can provide different voltage outputs for different daughter boards.
  • a daughter board is connected to the motherboard A.
  • the feedback terminal FB of the power IC on the motherboard A has a voltage
  • the power IC on the motherboard A compares the voltage and power of the feedback terminal FB.
  • the different voltage thresholds set inside the IC determine the daughter board that is connected to the motherboard A at this time.
  • the number of voltage thresholds matches the number of daughter boards. For example, if the motherboard is connected to four daughter boards, four voltage thresholds are set to correspond to different daughter boards one by one.
  • a protection threshold may be preset in the power IC of the motherboard A. If the voltage value of the FB terminal is greater than or equal to the protection threshold, it is determined that the connection between the motherboard A and the daughter board is poor, and the motherboard A is in this case. Corresponding voltage protection operations are available.
  • the daughter board is a converter
  • the above-mentioned circuit connection enables the motherboard A to recognize different partitions and perform different local dimming.
  • the circuit of the embodiment connects the feedback terminal of the motherboard to the resistor connected to the ground in each sub-board, and detects the voltage of the feedback terminal during power-on, and compares it with a plurality of voltages set in the motherboard. The thresholds are compared to determine which daughter board is currently electrically connected to the motherboard. This embodiment not only distinguishes the connection combination of the motherboard and the daughter board, but also Nor did it add too much cost.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Engineering & Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)
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Abstract

一种反馈分离式电路及其母板和子板组合检测方法，该电路包括：一母板，其上设置一控制器；与母板分离设置的多个子板，各个子板上分别设置一阻值不同的电阻，且各电阻的一端分别连接至控制器的反馈端，另一端接地。该电路不仅区分了母板和子板的连接组合，而且也未增加过多的成本。

Description

一种反馈分离式电路及其母板和子板组合检测方法
相关申请的交叉引用
本申请要求享有2014年11月5日提交的名称为“一种反馈分离式电路及其母板和子板组合检测方法”的中国专利申请CN201410621063.9的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及电子电路领域，尤其涉及一种反馈分离式电路及其母板和子板组合检测方法。
背景技术
现有的电路板系统一般包括母板(也称母卡、主卡或主板)及若干子板。母板及子板分别包括有电源层、接地层及信号层。母板一般采用无源设计且在结构上是固定的。子板则是可以活动的，通过可插拔的连接器与母板电性连接。
当电路母板与子板分离、并且单一母板(例如母板A)可搭配多个子板(例如子板a、b、c...)的时候会遇到一个问题，就是如何才能了解到母板和子板的具体组合的情况，从而使母板送出正确的信号到当前与之组合的子板。
对于上述问题，现有技术中存在以下两种方法：
其一，对于同时具有多块母板(例如母板A1、A2、A3....)，在组装时，组装人员根据事先设定的母板和子板组合(例如A1-a、A2-b...)，在母板上对应安装相应的子板。然而，这种方案易出现混搭，且消耗大量人工成本。
其二，如图1所示，对于同一母板A来说，在待与之组装的各个子板上分别增加一颗存储器，例如电可擦可编程只读存储器EEPROM(Electrically Erasable Programmable Read-Only Memory)，在组装上电后母板通过读取EEPROM的数据，判断此时与之连接的子板，然后再做出正确输出。虽然这种方法出错概率低，但是由于在每个子板上都需要增 加一颗EEPROM，这样会造成成本的上升。
因此，如何解决上述问题，以在区分与母板连接的当前子板的同时，能够不增加大量的制作成本，乃业界所致力的课题之一。
发明内容
本发明所要解决的技术问题之一是需要提供一种反馈分离式电路，该电路能够检测母板与子板组合，并不增加大量的成本。另外，还提供了一种利用该电路的母板和子板组合检测方法。
1)为了解决上述技术问题，本发明提供了一种反馈调整分离式电路，包括：一母板，其上设置一控制器；与所述母板分离设置的多个子板，各个子板上分别设置一电阻值互不相同的电阻，且各个电阻的一端分别连接至所述控制器的同一反馈端，另一端接地，其中，在多个子板其中之一上电时，所述母板的控制器比较所述反馈端的电压和该控制器内部预设的多个电压阈值之一来判断当前与母板电连接的子板，并进行相应输出，所述电压阈值个数与所述子板的个数匹配。
2)在本发明的第1)项的一个优选实施方式中，所述控制器内部预设一保护电压阈值，在所述反馈端的电压大于或等于该保护电压阈值时，所述母板进行电压保护操作。
3)在本发明的第1)项或第2)项中的一个优选实施方式中，在所述母板为一系统板，子板为不同的液晶面板时，所述母板上设置一电阻，该电阻的一端连接至所述控制器的反馈端，另一端接至一第一设定电压。
4)在本发明的第1)项-第3)项中任一项的一个优选实施方式中，所述第一设定电压的电压值为5V。
5)在本发明的第1)项-第4)项中任一项的一个优选实施方式中，所述保护电压阈值为5V。
6)在本发明的第1)项-第5)项中任一项的一个优选实施方式中，在所述母板为一配电板，所述控制器为一驱动IC，子板为液晶显示器的背光中的不同的变换器时，所述母板上设置一由两个电阻串联的电阻串，该电阻串的一端接地，另一端接至一第二设定电压，该电阻串中两电阻连接的节点连接所述驱动IC的反馈端。
7)在本发明的第1)项-第6)项中任一项的一个优选实施方式中，各个子板上分别 设置的电阻之间的电阻值差为10KΩ。
8)根据本发明的另一方面，还提供了一种利用上述的电路来检测母板和子板组合的方法，包括步骤：将多个子板其中之一上电；所述母板的控制器比较所述反馈端的电压和该控制器内部预设的多个电压阈值之一来判断当前与母板电连接的子板，并进行相应输出。
9)在本发明的第8)项的一个优选实施方式中，所述母板的控制器在比较出所述反馈端电压大于或等于该控制器内部设定的保护电压阈值时，所述母板进行电压保护操作。
与现有技术相比，本发明的一个或多个实施例可以具有如下优点：
本发明实施例的电路通过将母板反馈端与各个子板中的下拉到接地的电阻连接，在上电时通过检测反馈端的电压，并将其与母板中设定的多个电压阈值进行比较，进而判断出与母板当前电连接的是哪一块子板。本发明实施例的电路不仅能够区分母板和子板的连接组合，而且也未增加过多的成本。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例共同用于解释本发明，并不构成对本发明的限制。在附图中：
图1是现有技术中一区分母板与子板组装的电路连接图；
图2是根据本发明一实施例的反馈分离式电路的示意图；
图3是根据本发明另一实施例的反馈分离式电路的示意图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，以下结合附图对本发明作进一步地详细说明。
(第一实施例)
图2是根据本发明一实施例的反馈分离式电路的示意图，下面参考图2来详细说明组成该电路的结构和各结构之间的连接关系。
需要说明的是，本实施例以针对子板为液晶面板(C/B)为例提出的一种电路，其母板为一系统板，图2所示的这种电路设置，可以使得母板能够识别不同解析度和刷新率(例如解析度为1366X768或1920X1080、刷新率为60Hz或120Hz)的液晶面板，并进行不同输出。当然，其仅为一个示例，本领域技术人员可以参考本实施例，根据具体实际需要将子板设置为其他类型。
请参考图2，在母板A上预留一颗电阻R_1，其电位上拉到一设定电压(例如5V)，而在各个子板上分别预留一颗电阻值互不相同的电阻，且各个电阻的电位下拉到接地GND。母板A上设置的微控制器的反馈端ADC分别与各个下拉到接地的电阻连接。
其中，母板A上的电阻R_1＝10KΩ，各个子板上分别设置的电阻之间的电阻值差为10KΩ，例如a板的R_2＝20KΩ、b板的R_3＝30KΩ、c板的R_4＝40KΩ以及d板的R_5＝50KΩ。在上电时，一子板与该母板A连接，此时在母板A上的微控制器的ADC端具有一电压，然后母板A上的微控制器通过比较ADC端的电压和微控制器内部预设的多个电压阈值之一，来确定此时与该母板A电连接的子板，并进行相应输出。电压阈值个数与子板的个数匹配，例如，该母板A连接4个子板，则对应设置4个电压阈值来一一对应不同的子板。
举例而言，当母板A连接的是子板c时，微控制器的ADC端的电压值就是
Figure PCTCN2014095341-appb-000001
母板A的微控制器中预置的电压阈值中包括4V这一阈值，该微控制器通过比较即可知此时是母板A与子板c连接，然后母板A对子板c做出对应的输出。
另外，在母板A的微控制器中还可预置一保护阈值，例如5V，如果反馈端ADC的电压值大于或等于5V时，则判定母板A与子板之间连线接触不良，此时母板A可进行相应的电压保护操作。
综上，本实施例的电路通过将母板反馈端与各个子板中的下拉到接地的电阻连接，在上电时通过检测反馈端的电压，并将其与母板中设定的多个电压阈值进行比较，进而判断出与母板当前电连接的是哪一块子板。本实施例不仅区分了母板和子板的连接组合，而且也未增加过多的成本。
(第二实施例)
图3是根据本发明另一实施例的反馈分离式电路的示意图，下面参考图3来详细说明该电路的结构和连接。
需要说明的是，本实施例以子板为液晶显示器的背光中的不同变换器为例提出一种电路，其母板A为一系统板，具体为一配电板，用于为各个子板提供相应的电压VOUT，子板为母板的负载。当然，其仅为一个示例，本领域技术人员可以参考本实施例，根据具体实际需要将子板设置为其他类型。
请参考图3，在各个子板上分别预留一颗电阻值不同的电阻，且各个电阻的电位下拉到接地GND。在母板A上设置一由两个电阻R_1和R_6串联的电阻串，在R_1的一端连接一电压输入端，在R_6的一端接地。母板A上的电源IC的反馈端FB接至两电阻R_1和R_6的连接的节点。
在母板A连接不同子板时，母板A上的电源IC的反馈端FB并联不同电阻，在上电时通过检测反馈端的电压，并将其与母板中设定的多个电压阈值进行比较，进而判断出与母板当前电连接的是哪一块子板，因此母板A可以对不同的子板提供不同的电压输出。
其中，母板A上的电阻R_1＝10KΩ、R_6＝20KΩ，各个子板上分别设置的电阻之间的电阻值差为10KΩ，例如a板的R_2＝20KΩ、b板的R_3＝30KΩ、c板的R_4＝40KΩ以及d板的R_5＝50KΩ。在上电时，一子板与该母板A连接，此时在母板A上的电源IC的反馈端FB具有一电压，然后母板A上的电源IC通过比较反馈端FB的电压和电源IC内部设置的不同的电压阈值，来确定此时与该母板A所连接的子板。电压阈值个数与子板的个数匹配，例如，该母板连接4个子板，则对应设置4个电压阈值来一一对应不同的子板。
另外，母板A的电源IC中还可预置一保护阈值，如果FB端电压值大于或等于该保护阈值时，则判定母板A与子板之间连线接触不良，此时母板A可进行相应的电压保护操作。
本实施例中，由于子板为变换器，通过上述电路连接能够使得母板A识别不同分区，进行不同的局部调光。
综上，本实施例的电路通过将母板反馈端与各个子板中的下拉到接地的电阻连接，在上电时通过检测反馈端的电压，并将其与母板中设定的多个电压阈值进行比较，进而判断出与母板当前电连接的是哪一块子板。本实施例不仅区分了母板和子板的连接组合，而且 也未增加过多的成本。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉该技术的人员在本发明所揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应该以权利要求的保护范围为准。

Claims (9)

  1. 一种反馈调整分离式电路，包括：
    一母板，其上设置一控制器；
    与所述母板分离设置的多个子板，各个子板上分别设置一电阻值互不相同的电阻，且各个电阻的一端分别连接至所述控制器的同一反馈端，另一端接地，
    其中，在多个子板其中之一上电时，所述母板的控制器比较所述反馈端的电压和该控制器内部预设的多个电压阈值之一来判断当前与母板电连接的子板，并进行相应输出，所述电压阈值个数与所述子板的个数匹配。
  2. 根据权利要求1所述的反馈调整分离式电路，其中，
    所述控制器内部预设一保护电压阈值，在所述反馈端的电压大于或等于该保护电压阈值时，所述母板进行电压保护操作。
  3. 根据权利要求2所述的反馈调整分离式电路，其中，在所述母板为一系统板，子板为不同的液晶面板时，所述母板上设置一电阻，该电阻的一端连接至所述控制器的反馈端，另一端接至一第一设定电压。
  4. 根据权利要求3所述的反馈调整分离式电路，其中，所述第一设定电压的电压值为5V。
  5. 根据权利要求4所述的反馈调整分离式电路，其中，所述保护电压阈值为5V。
  6. 根据权利要求2所述的反馈调整分离式电路，其中，在所述母板为一配电板，所述控制器为一驱动IC，子板为液晶显示器的背光中的不同的变换器时，所述母板上设置一由两个电阻串联的电阻串，该电阻串的一端接地，另一端接至一第二设定电压，该电阻串中两电阻连接的节点连接所述驱动IC的反馈端。
  7. 根据权利要求1所述的反馈调整分离式电路，其中，各个子板上分别设置的电阻之间的电阻值差为10KΩ。
  8. 一种利用反馈调整分离式电路来检测母板和子板组合的方法，所述反馈调整分离 式电路，包括：一母板，其上设置一控制器；与所述母板分离设置的多个子板，各个子板上分别设置一电阻值互不相同的电阻，且各个电阻的一端分别连接至所述控制器的同一反馈端，另一端接地，所述方法包括如下步骤：
    将多个子板其中之一上电；
    所述母板的控制器比较所述反馈端的电压和该控制器内部预设的多个电压阈值之一来判断当前与母板电连接的子板，并进行相应输出，所述电压阈值个数与所述子板的个数匹配。
  9. 根据权利要求8所述的方法，其中，
    所述母板的控制器在比较出所述反馈端电压大于或等于该控制器内部设定的保护电压阈值时，所述母板进行电压保护操作。
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