CN206931988U - High reliability under-voltage protecting circuit and power supply - Google Patents
High reliability under-voltage protecting circuit and power supply Download PDFInfo
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- CN206931988U CN206931988U CN201720782281.XU CN201720782281U CN206931988U CN 206931988 U CN206931988 U CN 206931988U CN 201720782281 U CN201720782281 U CN 201720782281U CN 206931988 U CN206931988 U CN 206931988U
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Abstract
A kind of high reliability under-voltage protecting circuit and power supply are the utility model is related to, the protection circuit is located between power source bus and main circuit, including is connected between the input of power source bus and ground, busbar voltage is detected to produce the detection circuit of detection voltage；It is connected with detection circuit, processing is compared and enlarged in detection voltage and reference voltage, and main circuit is output control signals to when detecting voltage and being less than reference voltage, so that the process circuit that main circuit is stopped.Implementing the under-voltage protecting circuit can be so that the problem of power supply avoids under-voltage use when client makes; effectively solves the problems, such as the working condition for causing power supply to be in under-voltage input because of voltage ripple of power network; also solve busbar voltage simultaneously and be in the precision difference of the faint fluctuation or device of the sensitivity problem, busbar voltage that occur during 1 boundary's point in itself and cause the extremely unstable phenomenon to be worked under zero boundary's state, it is ensured that the reliability and stability of main circuit.
Description
Technical field
Field of power supplies is the utility model is related to, more specifically to a kind of high reliability under-voltage protecting circuit and power supply.
Background technology
With LED power application it is widely available, application deepens continuously, and variation occurs in use environment, than
If any room lighting, Intelligent House Light, bulkhead lamp illumination；There are outdoor lighting, street lamp, High-Pole Lamp, Landscape Lamp etc.；Different
Use environment has different requirements again.Some clients need water proof and dust proof, the higher lightening surge preventing energy of some customer requirements
Power, some customer requirements will have very low THD, and some customer requirements will have good Electro Magnetic Compatibility etc..
Some power supplys in client abnormal damage are have also discovered while client's various requirement is met, through researching and analysing
The reason for determining damage afterwards is often caused by the under-voltage use, much controls IC to be all integrated with for this problem under-voltage
Defencive function, still, also there is some early stages IC without this function, so for the type shaped and produced in batches, need
A kind of improved circuit is provided to solve the problems, such as the under-voltage use of client.
Utility model content
The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided a kind of highly reliable
Property under-voltage protecting circuit and power supply.
Technical scheme is used by the utility model solves its technical problem：Construct a kind of high reliability under-voltage protection electricity
Road, between power source bus and main circuit, the under-voltage protecting circuit includes：
It is connected between the input and ground of the power source bus, busbar voltage is detected to produce detection voltage
Detect circuit；
It is connected between the detection circuit and the main circuit, the detection voltage is put compared with reference voltage
Big processing, and the main circuit is output control signals to when the detection voltage is less than the reference voltage, so that the master
The process circuit that circuit is stopped.
Preferably, in addition to：
Be connected to it is described detection circuit and the main circuit between, for the process circuit startup after, described in reduction
Voltage is detected so that the hysteresis circuit of the process circuit steady operation.
Preferably, in addition to：
It is connected to the current-limiting resistance R8 for carrying out current limliting between the process circuit and the main circuit to the control signal.
Preferably, the detection circuit includes first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance
R4, the first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 are sequentially connected in series in the power source bus
Between input and ground.
Preferably, in addition to：It is connected between the 3rd resistor R3 and the 4th resistance R4, for the bus
Voltage carries out the single phase rectifier circuit of rectification；
The single phase rectifier circuit includes the first diode D1, the first diode D1 anode and the 3rd resistor
R3 connections, the negative electrode of the first diode D1 are connected with the 4th resistance R4, wherein, the negative electrode of the first diode D1
Node between the 4th resistance R4 is additionally coupled to the process circuit；
Node voltage between the negative electrode and the 4th resistance R4 of the first diode D1 is the detection voltage.
Preferably, in addition to：
It is in parallel with the 4th resistance R4 that processing is filtered to the detection voltage, and when the busbar voltage raises
By the mu balanced circuit of the detection voltage clamping within a preset range.
Preferably, the mu balanced circuit include filter capacitor C1 and voltage-regulator diode ZD1, the filter capacitor C1 with it is described
Voltage-regulator diode ZD1 is in parallel with the 4th resistance R4, and the plus earth of the voltage-regulator diode ZD1.
Preferably, the process circuit includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first triode Q1
And the second triode Q2, the first end of the 5th resistance R5 are connected to the negative electrode and the described 4th of the first diode D1
Between resistance R4, the second end of the 5th resistance R5 is connected with the base stage of the first triode Q1；
The emitter stage of the first triode Q1 receives reference voltage, and the colelctor electrode of the first triode Q1 passes through described
6th resistance R6 is connected with the base stage of the second triode Q2, and the first end of the 7th resistance R7 is connected to the 6th electricity
Between the base stage for hindering R6 and the second triode Q2, the second end connection ground of the 7th resistance R7；
The emitter stage connection ground of the second triode Q2, the colelctor electrode of the second triode Q2 pass through current limliting electricity
Resistance R8 is connected to the main circuit.
Preferably, the hysteresis circuit includes the second diode D2 and hysteresis resistance R74, the second diode D2 and institute
State in parallel with the process circuit after hysteresis resistance R74 series connection, and the anode of the second diode D2 and the one or two pole
Pipe D1 negative electrode connection.
The utility model also provides a kind of power supply, including above-mentioned high reliability under-voltage protecting circuit.
Implement high reliability under-voltage protecting circuit of the present utility model, have the advantages that：Height of the present utility model
Reliability under-voltage protecting circuit includes：It is connected between the input of power source bus and ground, busbar voltage is detected to produce
Biopsy surveys the detection circuit of voltage；Be connected with detection circuit, detection voltage and reference voltage are compared and enlarged processing, and
Detection voltage outputs control signals to main circuit when being less than reference voltage, so that the process circuit that main circuit is stopped.Implement
The problem of under-voltage protecting circuit can cause power supply to avoid under-voltage use when client makes, effectively solve because of line voltage ripple
The problem of moving and causing power supply to be in the working condition of under-voltage input, while also solve when busbar voltage is in 1 boundary's point and occur
Sensitivity problem, faint fluctuation or device the precision difference in itself of busbar voltage cause the pole to be worked under zero boundary's state
Wild effect, it is ensured that the reliability and stability of main circuit.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is the theory diagram of the utility model high reliability under-voltage protecting circuit first embodiment；
Fig. 2 is the circuit theory diagrams of the utility model high reliability under-voltage protecting circuit first embodiment.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.
For the existing type shaped and referred to production, the utility model is realized under-voltage by increasing external circuit
Defencive function, solves the problems, such as the working condition for making power supply be chronically at under-voltage input because of voltage ripple of power network.
To solve the technical problem, the utility model produces phase using the resistance detection busbar voltage being connected on bus
The detection voltage answered, and it is linear relationship to detect voltage with busbar voltage in design, then passes through transistor AND gate resistance, two poles
Pipe, the circuit of electric capacity composition are handled detection voltage, one control corresponding with the reference voltage set of final output
Signal, the work of main circuit is controlled by this control signal, protect Primary Component will not be because of voltage when under-voltage so as to realize
Or current stress is beyond damage risk caused by design requirement and continuous firing.
In addition, the utility model also uses the one-way conduction of diode to strengthen the reliability and stability of circuit
Characteristic add to detect voltage hysteresis handle, handled well occur when busbar voltage is in zero boundary's design point it is sensitive
Degree problem, faint fluctuation or device the precision difference in itself of busbar voltage cause to work under zero boundary's state extremely unstable existing
As, it is ensured that the reliability of main circuit.
As shown in figure 1, in the theory diagram of high reliability under-voltage protecting circuit first embodiment of the present utility model, should
The high reliability under-voltage protecting circuit of embodiment is arranged between power source bus and main circuit, is mainly included：Detect the He of circuit 10
Process circuit 20, wherein,
Detection circuit 10 is connected between the input of power source bus and ground, for being detected and being produced to busbar voltage
Corresponding detection voltage.Preferably, in this embodiment, detection circuit 10 can be made up of series resistance, by by resistance string
It is associated between the input of power source bus and ground, series connection partial pressure is carried out to busbar voltage by series resistance to realize, and then can make
Detection voltage and busbar voltage are linear relation caused by obtaining, i.e., when busbar voltage raises, detect voltage also in proportion
Rise, when busbar voltage declines, detection voltage also declines in proportion.Therefore, it is reachable by the monitoring and control to detecting voltage
To the Simultaneous Monitoring to busbar voltage and control.
Process circuit 20, it is connected between detection circuit 10 and main circuit, for detection voltage to be carried out with reference voltage
Compare enhanced processing, and main circuit is output control signals to when detecting voltage and being less than reference voltage, so that main circuit stops work
Make.
It is to be appreciated that reference voltage can be preset, and in order to ensure that power supply is in normal operating conditions, usually,
Reference voltage can use the maximum of busbar voltage as the reference voltage, that is, take the maximum of busbar voltage can as the present embodiment height
By the control condition of property under-voltage protecting circuit under-voltage protection, when detection voltage is less than the maximum (i.e. reference voltage) of busbar voltage
When, illustrate that power supply has the risk of under-voltage work, therefore, corresponding control can be made when detecting voltage and being less than reference voltage
System, to avoid the situation of under-voltage work from occurring, so as to reach the purpose of protection power source.
In order that detection voltage is more stable and the power device in circuit is can be at safe working environment, this implementation
The high reliability under-voltage protecting circuit of example is also provided with mu balanced circuit 40, and the mu balanced circuit 40 is in parallel with detection circuit 10.
It is to be appreciated that the mu balanced circuit 40 of the present embodiment can by electric capacity and regulator tube group into, wherein, electric capacity is used for inspection
Survey voltage and be filtered processing so that detection voltage is more stable, while can also couple in power down road caused interference signal with
Possibility caused by the accidental transient changing of busbar voltage controls by mistake.Voltage-stabiliser tube is then used for will inspection when busbar voltage constantly raises
Voltage clamping is surveyed in the section of a safety.Preferably, the security interval can be the voltage of voltage regulation of voltage-stabiliser tube, and it specifically can be by
Selected voltage-stabiliser tube is determined.
Further, the high reliability under-voltage protecting circuit of the present embodiment also includes hysteresis circuit 30, the hysteresis circuit 30
It is connected between detection circuit 10 and main circuit, is mainly used to allow detection voltage and is pulled low when process circuit 20 turns on, with
Avoid the unstable phenomenon of busbar voltage output control signal caused by when firing point fluctuates.
It is to be appreciated that hysteresis circuit 30 can be made up of resistance and Diode series, pass through the adjustable detection electricity of resistance
Pressure drags down scope, and its value size determines the size (detecting voltage by the width of hysteresis scope) for dragging down scope.Wherein,
It can be determined for the resistance of resistance according to actual product design, the utility model is not especially limited.
In order that the structure and principle of high reliability under-voltage protecting circuit of the present utility model are clearer, now with a tool
Body embodiment illustrates.
Refering to Fig. 2, Fig. 2 is the circuit theory diagrams of the utility model high reliability under-voltage protecting circuit first embodiment.Such as
Shown in Fig. 2, in the high reliability under-voltage protecting circuit of the embodiment, specifically,
Detection circuit 10 includes：First resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, wherein, the
One resistance R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 be sequentially connected in series input (VIN) in power source bus with
Between ground.Wherein, detection voltage is derived from the voltage on the 4th resistance R4.
As shown in Fig. 2 single phase rectifier circuit is provided between 3rd resistor R3 and the 4th resistance R4.It is it is to be appreciated that single
Commutating phase circuit is mainly used in carrying out rectification to busbar voltage, and can avoid backflow phenomena.
Preferably, the single phase rectifier circuit of the present embodiment can be constituted by a diode, as shown in Fig. 2 single phase rectifier circuit bag
The first diode D1 is included, wherein, the first diode D1 anode is connected with 3rd resistor R3, the first diode D1 negative electrode and
Four resistance R4 connections, wherein, the node between the first diode D1 negative electrode and the 4th resistance R4 is additionally coupled to process circuit 20.
Further, the node voltage between the first diode D1 negative electrode and the 4th resistance R4 is to detect voltage.
Process circuit 20 includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the first triode Q1 and the two or three
Pole pipe Q2, the 5th resistance R5 first end are connected between the first diode D1 negative electrode and the 4th resistance R4, the 5th resistance R5
The second end be connected with the first triode Q1 base stage；First triode Q1 emitter stage meets reference voltage, the first triode Q1
Colelctor electrode be connected by the 6th resistance R6 with the second triode Q2 base stage, the 7th resistance R7 first end is connected to the 6th electricity
Between the base stage for hindering R6 and the second triode Q2, the 7th resistance R7 the second end connection ground；Second triode Q2 emitter stage connects
Ground connection, the second triode Q2 colelctor electrode are connected to main circuit by current-limiting resistance R8 (wherein main circuit is not shown in figure).
Preferably, the first triode Q1 is PNP type triode, and the second triode Q2 is NPN type triode.Specifically,
Five resistance R5 are mainly used in carrying out detection voltage current limliting, and the first triode Q1 is mainly used in entering detection voltage with reference voltage
Row relatively enhanced processing, and turned on when detecting voltage and being less than reference voltage；6th resistance R6 and the 7th resistance R7 are mainly used in
The detection voltage of amplified processing carries out stability adjustment；Second triode Q2 is mainly used in being amplified place to detection voltage
Reason, and turned on when the first triode Q1 is turned on.
It is to be appreciated that the specific work process of process circuit 20 is：When the voltage on the 4th resistance R4 drops to first
During triode Q1 electric conduction pressure point, the first triode Q1 conductings, the second triode Q2 is also simultaneously turned on, carried out so that accessing master
The control signal of circuit is pulled low, so that main circuit is stopped, and then avoids the situation of under-voltage work from occurring.
Preferably, current-limiting resistance R8 is additionally provided between main circuit and process circuit 20, is mainly used in entering control signal
Row current limliting, and control signal can input main circuit by current-limiting resistance R8.Wherein, the SD shown in Fig. 2 is the present embodiment
Control signal.
Hysteresis circuit 30 includes：Second diode D2 and hysteresis resistance R74, the second diode D2 and hysteresis resistance R74 string
It is in parallel with process circuit 20 after connection, and the second diode D2 anode is connected with the first diode D1 negative electrode.
Wherein, the second diode D2 mainly utilizes its one-way conduction characteristic, may be such that detection voltage in the first triode Q1
It is pulled low during conducting, and then the unstable phenomenon of busbar voltage output control signal caused by when firing point fluctuates can be avoided.
And hysteresis resistance R74 is then mainly used in the hysteresis scope of regulation detection voltage.
Further, the specific work process of hysteresis circuit 30 is：When the first triode Q1 and the second triode Q2 is turned on
Afterwards, the series circuit that the 4th resistance R4 will form with the second diode D2, hysteresis resistance R74 and the second triode Q2 is simultaneously
Connection, now, the detection voltage on the 4th resistance R4 will be pulled low, so that it is guaranteed that the first triode Q1 reliable conducting.Work as mother
What line voltage VIN rises and the 4th resistance R4 formed with the second diode D2, hysteresis resistance R74 in parallel and the second triode Q2
When voltage on circuit has exceeded the first triode Q1 closing threshold voltage, the first triode Q1 shut-offs, the second triode Q2
Also judge simultaneously, now, the hysteresis circuit 30 of hysteresis resistance R74 and the second diode D2 compositions is breaking, on the 4th resistance R4
Detection voltage rapidly rises to higher point, and then makes the first triode Q1 reliable turn-offs.
Mu balanced circuit 40 includes filter capacitor C1 and voltage-regulator diode ZD1, wherein filter capacitor C1 and voltage-regulator diode ZD1
It is in parallel with the 4th resistance R4, and voltage-regulator diode ZD1 plus earth.
It is to be appreciated that filter capacitor C1 is mainly used in being filtered processing to detection voltage, so that detection voltage is more
It is stable, and it is intended to reference voltage, and filter capacitor C1 can also couple caused interference signal and bus electricity in power down road
Possibility caused by the accidental transient changing of pressure controls by mistake.
Voltage-regulator diode ZD1 is mainly used in carrying out clamper control to detection voltage.It is to be appreciated that due to detection voltage with
Busbar voltage is linear relationship, and therefore, when busbar voltage constantly raises, detection voltage also raises in proportion, and the one or three pole
Pipe Q1 base stage and the breakdown voltage of emitter stage are limited, for example, the triode of common SOT-23 encapsulation is all in 6V or so, so
When VIN is in high pressure conditions, the first triode Q1 can have the risk of breakdown, therefore, can be fine by voltage-regulator diode ZD1
Will detection voltage clamping in the section of a safety (i.e. voltage-regulator diode ZD1 voltage stabilizing ability).
The utility model additionally provides a kind of power supply, and the power supply is provided with above-mentioned high reliability under-voltage protecting circuit, passes through
Above-mentioned high reliability under-voltage protecting circuit is set to may be such that power supply avoids in client and under-voltage work is in the presence of, effectively
Protect the service behaviour of power supply and extend the service life of power supply.
To make the technical scheme of high reliability under-voltage protecting circuit of the present utility model clearer, below in Fig. 2
The operation principle of physical circuit is described in further detail.
As illustrated in fig. 2, it is assumed that busbar voltage is VIN, wherein, reference voltage takes the maximum of busbar voltage.Specifically,
One resistance R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 carry out series connection and produce detection voltage, pass through four series connection
Series connection partial pressure realizes the real-time detection to busbar voltage caused by voltage, and detects voltage and carry out current limliting by current-limiting resistance R5
The first triode Q1 base stage is inputted afterwards, is judged by the first triode Q1 by voltage is detected compared with reference voltage, when
(now, detect voltage to be less than when detection voltage drops to the first triode Q1 conducting voltage caused by 4th resistance R4
Reference voltage), the first triode Q1 conductings, the second triode Q2 is also simultaneously turned on, and then control signal SD is pulled low, from
And main circuit is stopped, it efficiently avoid power supply and be in underexcitation.
After the first triode Q1 and the second triode Q2 is turned on, hysteresis circuit 30 starts, the second diode D2, hysteresis electricity
It is in parallel with the 4th resistance R4 to hinder the series circuit of R4 and the second triode Q2 compositions, now the detection voltage on the 4th resistance R4 will
It can be pulled low, so that it is guaranteed that the first triode Q1 reliable conducting；When busbar voltage VIN go up and the 4th resistance R4 with it is in parallel
Voltage on the circuit of second diode D2, hysteresis resistance R74 and the second triode Q2 compositions has exceeded the first triode Q1's
When closing threshold voltage, the first triode Q1 and the second triode Q2 judge, now hysteresis resistance R74 and the second diode D2 groups
Into the open circuit of hysteresis circuit 30, the detection voltage on the 4th resistance R4 rapidly rises to higher point, it is ensured that the first triode
Q1 reliable turn-off.
To sum up, the high reliability under-voltage protecting circuit of the present embodiment can not only solve power supply and exist in client use
The problem of under-voltage use, but also handled busbar voltage well and be in the sensitivity problem occurred during zero boundary's design point, mother
The extremely unstable phenomenon to be worked under zero boundary's state caused by the precision difference of the faint fluctuation of line voltage or device in itself, is carried
The high reliability and stability of main circuit, extend the service life of power supply.
For above example only to illustrate technical concepts and features of the present utility model, its object is to allow be familiar with technique
Personage can understand content of the present utility model and implement accordingly, the scope of protection of the utility model can not be limited.It is all with
The equivalent changes and modifications that the utility model claims scope is done, all should belong to the utility model claims covers model
Enclose.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of the appended claims for the utility model.
Claims (10)
- A kind of 1. high reliability under-voltage protecting circuit, between power source bus and main circuit, it is characterised in that the under-voltage guarantor Protection circuit includes：It is connected between the input and ground of the power source bus, busbar voltage is detected to produce the detection of detection voltage Circuit；It is connected between the detection circuit and the main circuit, place is compared and enlarged with reference voltage in the detection voltage Reason, and the main circuit is output control signals to when the detection voltage is less than the reference voltage, so that the main circuit The process circuit being stopped.
- 2. high reliability under-voltage protecting circuit according to claim 1, it is characterised in that also include：It is connected between the detection circuit and the main circuit, for after process circuit startup, reducing the detection Voltage is so that the hysteresis circuit of the process circuit steady operation.
- 3. high reliability under-voltage protecting circuit according to claim 2, it is characterised in that also include：It is connected to the current-limiting resistance R8 for carrying out current limliting between the process circuit and the main circuit to the control signal.
- 4. high reliability under-voltage protecting circuit according to claim 3, it is characterised in that the detection circuit includes first Resistance R1, second resistance R2,3rd resistor R3 and the 4th resistance R4, the first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 are sequentially connected in series between the input and ground of the power source bus.
- 5. high reliability under-voltage protecting circuit according to claim 4, it is characterised in that also include：It is connected on described Between three resistance R3 and the 4th resistance R4, for carrying out the single phase rectifier circuit of rectification to the busbar voltage；The single phase rectifier circuit includes the first diode D1, the first diode D1 anode and the 3rd resistor R3 connects Connecing, the negative electrode of the first diode D1 is connected with the 4th resistance R4, wherein, the negative electrode of the first diode D1 and institute The node stated between the 4th resistance R4 is additionally coupled to the process circuit；Node voltage between the negative electrode and the 4th resistance R4 of the first diode D1 is the detection voltage.
- 6. high reliability under-voltage protecting circuit according to claim 4, it is characterised in that also include：It is in parallel with the 4th resistance R4 that processing is filtered to the detection voltage, and when the busbar voltage raises by institute State the mu balanced circuit of detection voltage clamping within a preset range.
- 7. high reliability under-voltage protecting circuit according to claim 6, it is characterised in that the mu balanced circuit includes filtering Electric capacity C1 and voltage-regulator diode ZD1, the filter capacitor C1 and the voltage-regulator diode ZD1 with the 4th resistance R4 simultaneously Connection, and the plus earth of the voltage-regulator diode ZD1.
- 8. high reliability under-voltage protecting circuit according to claim 5, it is characterised in that the process circuit includes the 5th Resistance R5, the 6th resistance R6, the 7th resistance R7, the first triode Q1 and the second triode Q2, the of the 5th resistance R5 One end is connected between negative electrode and the 4th resistance R4 of the first diode D1, the second end of the 5th resistance R5 with The base stage connection of the first triode Q1；The emitter stage of the first triode Q1 receives reference voltage, and the colelctor electrode of the first triode Q1 passes through the described 6th Resistance R6 is connected with the base stage of the second triode Q2, and the first end of the 7th resistance R7 is connected to the 6th resistance R6 Between the base stage of the second triode Q2, the second end connection ground of the 7th resistance R7；The emitter stage connection ground of the second triode Q2, the colelctor electrode of the second triode Q2 pass through the current-limiting resistance R8 It is connected to the main circuit.
- 9. high reliability under-voltage protecting circuit according to claim 5, it is characterised in that the hysteresis circuit includes second Diode D2 and hysteresis resistance R74, the second diode D2 connected with the hysteresis resistance R74 after with the process circuit simultaneously Connection, and the anode of the second diode D2 is connected with the negative electrode of the first diode D1.
- 10. a kind of power supply, it is characterised in that including the high reliability under-voltage protecting circuit described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720782281.XU CN206931988U (en) | 2017-06-30 | 2017-06-30 | High reliability under-voltage protecting circuit and power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720782281.XU CN206931988U (en) | 2017-06-30 | 2017-06-30 | High reliability under-voltage protecting circuit and power supply |
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| Publication Number | Publication Date |
|---|---|
| CN206931988U true CN206931988U (en) | 2018-01-26 |
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ID=61353408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720782281.XU Active CN206931988U (en) | 2017-06-30 | 2017-06-30 | High reliability under-voltage protecting circuit and power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708341A (en) * | 2021-09-04 | 2021-11-26 | 广西普德新星电源科技有限公司 | Undervoltage protection circuit |
| CN113777393A (en) * | 2021-09-23 | 2021-12-10 | 华东光电集成器件研究所 | RS485 interface communication under-amplitude detection circuit |
-
2017
- 2017-06-30 CN CN201720782281.XU patent/CN206931988U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708341A (en) * | 2021-09-04 | 2021-11-26 | 广西普德新星电源科技有限公司 | Undervoltage protection circuit |
| CN113777393A (en) * | 2021-09-23 | 2021-12-10 | 华东光电集成器件研究所 | RS485 interface communication under-amplitude detection circuit |
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