CN110058074A - A kind of power failure warning circuit and its control method - Google Patents
A kind of power failure warning circuit and its control method Download PDFInfo
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- CN110058074A CN110058074A CN201910365177.4A CN201910365177A CN110058074A CN 110058074 A CN110058074 A CN 110058074A CN 201910365177 A CN201910365177 A CN 201910365177A CN 110058074 A CN110058074 A CN 110058074A
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- 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
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
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Abstract
The invention discloses a kind of power failure warning circuit and its control methods, are related to power failure warning circuit field, comprising: discharge module, input terminal with input power for being connected；Isolation module, for being connected with input power, output end is connected input terminal with the input terminal of energy-storage units, and the output end of energy-storage units with the functional module of terminal device for being connected；Power down voltage detection module, its input terminal is connected between discharge module and isolation module, its output end with functional module for being connected, CPU element is equipped between the output end and functional module of power down voltage detection module, power down voltage detection module is used to detect the voltage of input power, branch pressure voltage is sent to CPU element after progress voltage division processing, CPU element is for judging whether branch pressure voltage is less than preset detection of power loss thresholding.The present invention is suitable for the terminal devices such as PON gateway, set-top box, convergent terminal, can make the voltage rapid decrease of input power, to reduce capacity, cost and the volume of energy-storage units.
Description
Technical field
The present invention relates to power failure warning circuit fields, and in particular to a kind of power failure warning circuit and its control method.
Background technique
In a communications system, after terminal device power down, terminal device needs to report power fail warning information, office to local side apparatus
After end equipment receives this information, performs corresponding processing and record, to the power down Terminal Equipment Identifier power fail warning state, this
Kind function is exactly power fail warning (DyingGasp) function.
Terminal device during power down, in order to realize the function of reporting power fail warning information to local side apparatus, set in terminal
In standby circuit design, it is necessary to which design has corresponding power failure warning circuit.Currently used way is placed at input power
The storage capacitor of large capacity, while total input power of equipment being divided by a certain percentage and is supplied to CPU detection, CPU has solid
Fixed detection of power loss thresholding, after terminal device power down, the voltage of input power declines, until the detection of power loss thresholding of CPU with
Under, CPU is detected as power down, is then shut off related electricity consumption module, reports power down information to local side, be disconnected to from input power
CPU completes to report the whole process of power fail warning information, maintains equipment to carry out various behaviour by the electricity stored in storage capacitor
Make, supports CPU that power fail warning information is sent to local side apparatus.
According to related protocol standard, system at least needs transmission, and power fail warning information, this process are generally at least needed three times
Want the time of 10ms or more.After guaranteeing power down, input voltage be reduced to triggering CPU detection power down after, system remain to after
Continuous work at least 10ms or more, the capacity of storage capacitor require sufficiently large, and on the other hand, the function and interface of terminal device get over
Come more, power consumption is increasing, and in order to guarantee the equipment same working time after power down, power consumption is bigger, required energy storage electricity
It is bigger to hold capacity, or even needs to place multiple big storage capacitors at equipment power input to realize power fail warning function.
It is this at present directly to divide detection in equipment power input voltage and directly place the way of storage capacitor, it is existing
Deficiency has 1: the peripheral interface of equipment increases, and the power consumption for needing to consume is also bigger, then the capacity for the capacitor that power fail warning needs
Also bigger, cost is excessively high.2: the electrolytic capacitor of large capacity can occupy more PCB spaces, capacitor volume in pcb board design
Increase, also be easy with structure generate interference the problems such as.3: the capacitor of large capacity is more prone to produce electrolyte leakage, bulge etc. and asks
Topic generates quality risk.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide a kind of power failure warning circuits, can make
The voltage rapid decrease of input power, to reduce the time of maintenance needed for energy-storage units, to reduce the cost of energy-storage units
And volume.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of power failure warning circuit, comprising:
Discharge module, input terminal with input power for being connected；
Isolation module, input terminal with the input power for being connected, the input terminal phase of output end and energy-storage units
Even, the output end of the energy-storage units with the functional module of terminal device for being connected, and the isolation module is for making electric current list
Functional module is flowed to ground from input power；
Power down voltage detection module, input terminal are connected between the discharge module and isolation module, and output end is used
It is connected in the functional module, and is equipped with CPU element between the output end and functional module of the power down voltage detection module,
The power down voltage detection module is used to detect the voltage of the input power, is sent to branch pressure voltage after carrying out voltage division processing
The CPU element, the CPU element is for judging whether the branch pressure voltage is less than preset detection of power loss thresholding.
Based on the above technical solution, the discharge module includes a discharge resistance R3, the discharge resistance R3's
One end with the input power for being connected, and the other end is for being grounded.
Based on the above technical solution, the power down voltage detection module include concatenated first detection resistance R1 and
One end of second detection resistance R2, the first detection resistance R1 with the input power for being connected, the second detection electricity
One end of resistance R2 is for being grounded, and the input terminal of the CPU element is connected to the detection electricity of the first detection resistance R1 and second
It hinders between R2.
Based on the above technical solution, the first detection resistance R1 and the second detection resistance R2 meets: R2:(R1+
R2)=A:B, wherein A is the detection of power loss thresholding, and B is the alarm voltage of the input power.
Based on the above technical solution, the isolation module includes a Schottky diode, two pole of Schottky
For being connected with the input power, the cathode of the Schottky diode is connected the anode of pipe with the energy-storage units.
Based on the above technical solution, the energy-storage units include the storage capacitor of multiple parallel connections.
At the same time, the purpose of the present invention is to provide a kind of control methods of power failure warning circuit, can make input electricity
The voltage rapid decrease in source, to reduce the time of maintenance needed for energy-storage units, to reduce the cost and volume of energy-storage units.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of control method based on above-mentioned power failure warning circuit, this method include with following steps:
S1. after terminal device power down, discharge module effect makes the voltage rapid decrease of input power；
S2. the voltage of power down voltage detection module real-time detection input power sends out branch pressure voltage after carrying out voltage division processing
It send to the CPU element；
Whether S3.CPU unit judges branch pressure voltage is less than preset detection of power loss thresholding, if so, thening follow the steps S4；If
It is no, then return step S2；
S4.CPU unit closes corresponding functional module on terminal device, and report and alarm.
Based on the above technical solution, power down voltage detection module utilizes concatenated first detection resistance R1 and second
Detection resistance R2 divides the voltage of the input power detected, and the input terminal of CPU element is connected to the first detection
Between resistance R1 and the second detection resistance R2, branch pressure voltage is sent to CPU element by power down voltage detection module, then mono- by CPU
Member judges whether branch pressure voltage is less than preset detection of power loss thresholding.
Based on the above technical solution, the first detection resistance R1 and the second detection resistance R2 meets: R2:(R1+R2)
=A:B, wherein A is detection of power loss thresholding, and B is the alarm voltage of input power.
Based on the above technical solution, preset detection of power loss thresholding is 1.2V or 1.5V, the alarm of input power
Voltage is 9V.
Compared with the prior art, the advantages of the present invention are as follows:
Power failure warning circuit of the invention falls due to being provided with discharge module at input power in input power
When electric, discharge module can make the voltage of input power drop quickly to the detection of power loss thresholding of CPU element hereinafter, quickly to touch
It sends out CPU element and carries out corresponding power failure alarm reporting and power down process.Isolation circuit is set at input power simultaneously, in power down
When, the electricity of storage capacitor will not discharge from discharge module to be consumed, and is only used for supporting the closing of terminal device and is reported power down dynamic
Make, to reduce the time of maintenance needed for storage capacitor, to reduce the function that storage capacitor electricity realizes power fail warning.I.e. quite
In the time for reducing consumption required for whole process, so as to reduce the requirement to storage capacitor capacity, so, one
Aspect can reduce the cost of storage capacitor, on the other hand can reduce the volume specification of storage capacitor, and then can reduce PCB
The volume of plate, further reduces the cost.After also avoiding the capacitor using large capacity simultaneously, the leakage of bring electrolyte, bulge
Etc. qualities risk problem.
Detailed description of the invention
Fig. 1 is the structural block diagram of power failure warning circuit in the embodiment of the present invention；
Fig. 2 is the circuit diagram of power failure warning circuit in the embodiment of the present invention；
Fig. 3 is the flow chart of the control method of power failure warning circuit in the embodiment of the present invention.
In figure: 1- discharge module, 2- isolation module, 3- energy-storage units, 4-CPU unit, 5- power down voltage detection module, 6-
Power circuit.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of power failure warning circuit comprising discharge module, isolation module,
Energy-storage units, power down voltage detection module and CPU element.Referring also to shown in Fig. 2, in the circuit diagram of Fig. 2, discharge module mark
It is denoted as 1, isolation module is labeled as 2, and energy-storage units are labeled as 3, and CPU element is labeled as 4, and power down voltage detection module is labeled as 5,
Power circuit is labeled as 6, wherein power circuit is equipped with n functional module.
Wherein, discharge module, input terminal with input power for being connected.Discharge module is mainly used for sending out in input power
When raw power down, the voltage of input power is made to drop quickly to the detection of power loss thresholding of CPU element hereinafter, mono- quickly to trigger CPU
Member carries out corresponding power failure alarm reporting and power down process.
Specifically, one end that the discharge module in the present embodiment includes discharge resistance a R3, the discharge resistance R3 is used
It is connected in the input power, the other end is for being grounded.It can make the voltage of input power under the action of discharge resistance R3
Drop quickly to the detection of power loss thresholding of CPU element or less.Preferably, the detection of power loss thresholding of CPU element can be 1.2V or
Person 1.5V, specific size depend on the parameter of CPU.And CPU element can reasonably select according to actual needs.
Isolation module, input terminal with the input power for being connected, the input terminal phase of output end and energy-storage units
Even, the output end of the energy-storage units with the functional module of terminal device for being connected, and the isolation module is for making electric current list
Functional module is flowed to ground from input power.
Specifically, the isolation module in the present embodiment includes a Schottky diode D1, the Schottky diode
For being connected with the input power, the cathode of the Schottky diode is connected anode with the energy-storage units.In Schottky
Under the action of diode, the power circuit and discharge module on terminal device can isolate, make electric current uniaxially from input power
Functional module is flowed to, when power down occurs for input power, when electric current being prevented to flow to input power direction, i.e. power down from energy-storage units
The electricity of energy-storage units is not influenced by the consumption of discharge module and input power, is only supplied to electricity consumption module, is extended electricity consumption
The time of module work.On the other hand, discharge module can also be made only to consume the electricity of input power, enables input supply voltage
Enough decline faster.
In addition, the energy-storage units in the present embodiment are the storage capacitor of multiple parallel connections, storage capacitor is used for storing electricity, and
Operation after input voltage power down, for the power failure alarm reporting after supporting terminal device to carry out power down.Preferably, here
Storage capacitor can be electrolytic capacitor EC (Electrolytic Capacitor), i.e. EC1, EC2 and EC3 in Fig. 2.
Power down voltage detection module, input terminal are connected between the discharge module and isolation module, and output end is used
It is connected in the functional module, and is equipped with CPU element between the output end and functional module of the power down voltage detection module,
The power down voltage detection module is used to detect the voltage of the input power, is sent to branch pressure voltage after carrying out voltage division processing
The CPU element, the CPU element is for judging whether the branch pressure voltage is less than preset detection of power loss thresholding.
Specifically, the power down voltage detection module includes concatenated first detection resistance R1 and the second detection resistance
For being connected with the input power, one end of the second detection resistance R2 is used for one end of R2, the first detection resistance R1
It is connected between the first detection resistance R1 and the second detection resistance R2 in the input terminal of ground connection, and the CPU element, in electricity
The both ends of resistance R2 are also parallel with capacitor C1, and capacitor C1 here mainly plays the role of filtering.
I.e. power down voltage detection module is using concatenated first detection resistance R1 and the second detection resistance R2 to detecting
The voltage of input power is divided, and branch pressure voltage is sent to CPU element, then judge whether branch pressure voltage is small by CPU element
In preset detection of power loss thresholding.Processing in this way does not need input voltage and drops to detection of power loss thresholding just to carry out power down
Alarm.If being A than preset detection of power loss thresholding, with regard to report and alarm, (A is power down inspection when if desired input voltage drops into B
Thresholding is surveyed, B is the alarm voltage of input power), it is only necessary to the first detection resistance R1 and the second detection resistance R2 meets: R2:(R1
+ R2)=A:B, the time spent needed for whole process can be saved in this way.As a preferable embodiment party
Formula, input power normal working voltage is 12V here, and preset detection of power loss thresholding is 1.2V or 1.5V, the announcement of input power
Alert voltage is 9V.Wherein, R1 and R2 select 10K grade or more of resistance, be connected in parallel on capacitor C1 selection 10pf on R2~
The capacitor of 100pf.
In conclusion the power failure warning circuit in the present embodiment, due to being provided with discharge module at input power, defeated
When entering power supply power down occurs, discharge module can make the voltage of input power drop quickly to the detection of power loss thresholding of CPU element
Hereinafter, carrying out corresponding power failure alarm reporting and power down process quickly to trigger CPU element.Simultaneously at input power setting every
From circuit, during power down, the electricity of storage capacitor will not discharge from discharge module to be consumed, and is only used for supporting the closing of terminal device
With report power-down actions, to reduce the time of maintenance needed for storage capacitor, thus reduce storage capacitor electricity realize power fail warning
Function.That is, the time consumed required for reducing whole process, wants storage capacitor capacity so as to reduce
It asks, so, on the one hand can reduce the cost of storage capacitor, on the other hand can reduce the volume specification of storage capacitor,
And then the volume of pcb board can be reduced, it further reduces the cost.After also avoiding the capacitor using large capacity simultaneously, bring
The qualities risk problems such as electrolyte leakage, bulge.
Shown in Figure 3, the embodiment of the present invention also provides a kind of control method of power failure warning circuit, this method include with
Following steps:
S1. after terminal device power down, discharge module effect makes the voltage rapid decrease of input power；
Discharge module in the present embodiment includes a discharge resistance R3, one end of the discharge resistance R3 and input electricity
Source is connected, other end ground connection.After this processing mode, the voltage of input power can be made under the action of discharge resistance R3
Drop quickly to the detection of power loss thresholding of CPU element or less.
S2. the voltage of power down voltage detection module real-time detection input power sends out branch pressure voltage after carrying out voltage division processing
It send to the CPU element；
Specifically, the power down voltage detection module in the present embodiment includes the inspection of concatenated first detection resistance R1 and second
Measuring resistance R2, one end of the first detection resistance R1 are connected with input power, one end ground connection of the second detection resistance R2, and CPU is mono-
The input terminal of member is connected between the first detection resistance R1 and the second detection resistance R2.
I.e. power down voltage detection module is using concatenated first detection resistance R1 and the second detection resistance R2 to detecting
The voltage of input power is divided, and branch pressure voltage is sent to CPU element, then judge whether branch pressure voltage is small by CPU element
In preset detection of power loss thresholding.Processing in this way does not need input voltage and drops to detection of power loss thresholding just to carry out power down
Alarm.If being A than preset detection of power loss thresholding, with regard to report and alarm, (A is power down inspection when if desired input voltage drops into B
Thresholding is surveyed, B is the alarm voltage of input power), it is only necessary to the first detection resistance R1 and the second detection resistance R2 meets: R2:(R1
+ R2)=A:B, the time spent needed for whole process can be saved in this way.As a preferable embodiment party
Formula, input power normal working voltage is 12V here, and preset detection of power loss thresholding is 1.2V or 1.5V, the announcement of input power
Alert voltage is 9V.Wherein, R1 and R2 select 10K grade or more of resistance, be connected in parallel on capacitor C1 selection 10pf on R2~
The capacitor of 100pf.
Whether S3.CPU unit judges branch pressure voltage is less than preset detection of power loss thresholding, if so, thening follow the steps S4；If
It is no, then return step S2；
In the present embodiment, the detection of power loss thresholding of CPU element can be 1.2V or 1.5V, and specific size depends on
The parameter of CPU.And CPU element can reasonably select according to actual needs.
S4.CPU unit closes corresponding functional module on terminal device, and report and alarm.
The control method of power failure warning circuit in the present embodiment quickly reduces the electricity of input power using discharge module
Pressure, when power down occurs for input power, the power down that discharge module can make the voltage of input power drop quickly to CPU element is examined
Thresholding is surveyed hereinafter, carrying out corresponding power failure alarm reporting and power down process quickly to trigger CPU element.Simultaneously at input power
Isolation circuit is set, and during power down, the electricity of storage capacitor will not discharge from discharge module to be consumed, and is only used for supporting terminal device
Closing and report power-down actions, to reduce the time of maintenance needed for storage capacitor, thus reduce storage capacitor electricity realize fall
The function of electric alarm.That is, the time consumed required for reducing whole process, holds storage capacitor so as to reduce
On the one hand the requirement of amount so can reduce the cost of storage capacitor, on the other hand can reduce the volume of storage capacitor
Specification, and then the volume of pcb board can be reduced, it further reduces the cost.After also avoiding the capacitor using large capacity simultaneously, band
The qualities risk problems such as the electrolyte leakage, the bulge that come.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of power failure warning circuit characterized by comprising
Discharge module, input terminal with input power for being connected；
Isolation module, input terminal with the input power for being connected, and output end is connected with the input terminal of energy-storage units, institute
The output ends of energy-storage units is stated for being connected with the functional module of terminal device, the isolation module be used to making electric current uniaxially from
Input power flows to functional module；
Power down voltage detection module, input terminal are connected between the discharge module and isolation module, output end be used for
The functional module is connected, and CPU element is equipped between the output end and functional module of the power down voltage detection module, described
Power down voltage detection module is used to detect the voltage of the input power, is sent to branch pressure voltage after progress voltage division processing described
CPU element, the CPU element is for judging whether the branch pressure voltage is less than preset detection of power loss thresholding.
2. power failure warning circuit as described in claim 1, it is characterised in that: the discharge module includes a discharge resistance R3,
One end of the discharge resistance R3 with the input power for being connected, and the other end is for being grounded.
3. power failure warning circuit as described in claim 1, it is characterised in that: the power down voltage detection module includes concatenated
One end of first detection resistance R1 and the second detection resistance R2, the first detection resistance R1 are used for and the input power phase
Even, one end of the second detection resistance R2 is for being grounded, and the input terminal of the CPU element is connected to the first detection electricity
It hinders between R1 and the second detection resistance R2.
4. power failure warning circuit as claimed in claim 3, it is characterised in that: the detection electricity of the first detection resistance R1 and second
Hinder R2 to meet: R2:(R1+R2)=A:B, wherein A is the detection of power loss thresholding, and B is the alarm voltage of the input power.
5. power failure warning circuit as described in claim 1, it is characterised in that: the isolation module includes two pole of a Schottky
Pipe, the anode of the Schottky diode for being connected with the input power, the cathode of the Schottky diode with it is described
Energy-storage units are connected.
6. power failure warning circuit as described in claim 1, it is characterised in that: the energy-storage units include the energy storage of multiple parallel connections
Capacitor.
7. a kind of control method based on power failure warning circuit described in claim 1, which is characterized in that this method include with
Lower step:
S1. after terminal device power down, discharge module effect makes the voltage rapid decrease of input power；
Branch pressure voltage is sent to by the S2. voltage of power down voltage detection module real-time detection input power after carrying out voltage division processing
The CPU element；
Whether S3.CPU unit judges branch pressure voltage is less than preset detection of power loss thresholding, if so, thening follow the steps S4；If it is not,
Then return step S2；
S4.CPU unit closes corresponding functional module on terminal device, and report and alarm.
8. control method as claimed in claim 7, it is characterised in that: power down voltage detection module utilizes concatenated first detection
Resistance R1 and the second detection resistance R2 divide the voltage of the input power detected, and the input terminal of CPU element is connected
It connects between the first detection resistance R1 and the second detection resistance R2, it is mono- that branch pressure voltage is sent to CPU by power down voltage detection module
Member, then judge whether branch pressure voltage is less than preset detection of power loss thresholding by CPU element.
9. control method as claimed in claim 8, it is characterised in that: the first detection resistance R1 and the second detection resistance R2 is full
Foot: R2:(R1+R2)=A:B, wherein A is detection of power loss thresholding, and B is the alarm voltage of input power.
10. control method as claimed in claim 7, it is characterised in that: preset detection of power loss thresholding is 1.2V or 1.5V, defeated
The alarm voltage for entering power supply is 9V.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910365177.4A CN110058074A (en) | 2019-04-30 | 2019-04-30 | A kind of power failure warning circuit and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910365177.4A CN110058074A (en) | 2019-04-30 | 2019-04-30 | A kind of power failure warning circuit and its control method |
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Family
ID=67322105
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| CN201910365177.4A Pending CN110058074A (en) | 2019-04-30 | 2019-04-30 | A kind of power failure warning circuit and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899939A (en) * | 2021-12-10 | 2022-01-07 | 广东省新一代通信与网络创新研究院 | Power failure warning circuit and processing method for communication equipment and communication equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713553A (en) * | 1985-10-21 | 1987-12-15 | Motorola Inc. | Fast power-fail detector for power supplies with energy hysteresis |
| CN205507527U (en) * | 2016-02-01 | 2016-08-24 | 无锡中誉东莲电气技术有限公司 | Testing device for control panel of variable -frequency drive |
| CN106033997A (en) * | 2015-03-20 | 2016-10-19 | 中兴通讯股份有限公司 | Processing method and device for power-off alarms and terminal |
| CN206557275U (en) * | 2017-01-23 | 2017-10-13 | 北京益弘泰科技发展有限责任公司 | A kind of AC dump warning circuit |
| CN107507405A (en) * | 2017-09-22 | 2017-12-22 | 烽火通信科技股份有限公司 | Reduce the method and system of power fail warning handling duration |
| CN107979270A (en) * | 2017-11-24 | 2018-05-01 | 卫星电子（中山）有限公司 | A kind of power supply unit with power-off protection function |
| CN207896977U (en) * | 2018-03-16 | 2018-09-21 | 烽火通信科技股份有限公司 | A kind of power fail warning control circuit |
-
2019
- 2019-04-30 CN CN201910365177.4A patent/CN110058074A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4713553A (en) * | 1985-10-21 | 1987-12-15 | Motorola Inc. | Fast power-fail detector for power supplies with energy hysteresis |
| CN106033997A (en) * | 2015-03-20 | 2016-10-19 | 中兴通讯股份有限公司 | Processing method and device for power-off alarms and terminal |
| CN205507527U (en) * | 2016-02-01 | 2016-08-24 | 无锡中誉东莲电气技术有限公司 | Testing device for control panel of variable -frequency drive |
| CN206557275U (en) * | 2017-01-23 | 2017-10-13 | 北京益弘泰科技发展有限责任公司 | A kind of AC dump warning circuit |
| CN107507405A (en) * | 2017-09-22 | 2017-12-22 | 烽火通信科技股份有限公司 | Reduce the method and system of power fail warning handling duration |
| CN107979270A (en) * | 2017-11-24 | 2018-05-01 | 卫星电子（中山）有限公司 | A kind of power supply unit with power-off protection function |
| CN207896977U (en) * | 2018-03-16 | 2018-09-21 | 烽火通信科技股份有限公司 | A kind of power fail warning control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113899939A (en) * | 2021-12-10 | 2022-01-07 | 广东省新一代通信与网络创新研究院 | Power failure warning circuit and processing method for communication equipment and communication equipment |
| CN113899939B (en) * | 2021-12-10 | 2022-03-29 | 广东省新一代通信与网络创新研究院 | Power failure warning circuit and processing method for communication equipment and communication equipment |
| WO2023104196A1 (en) * | 2021-12-10 | 2023-06-15 | 广东省新一代通信与网络创新研究院 | Power failure alarm circuit for communication device, power failure alarm processing method for communication device, and communication device |
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Application publication date: 20190726 |
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