CN206922502U - Power down protection control circuit and electronic equipment - Google Patents
Power down protection control circuit and electronic equipment Download PDFInfo
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- CN206922502U CN206922502U CN201720826535.3U CN201720826535U CN206922502U CN 206922502 U CN206922502 U CN 206922502U CN 201720826535 U CN201720826535 U CN 201720826535U CN 206922502 U CN206922502 U CN 206922502U
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Abstract
The utility model proposes a kind of power down protection control circuit and electronic equipment, it is related to technical field of automatic control.The power down protection control circuit includes power circuit, super capacitor, hysteresis control circuit and first switch circuit; super capacitor electrically connects with power circuit; first switch circuit and super capacitor and the circuit of power down protection is needed to electrically connect, hysteresis control circuit electrically connects with super capacitor and first switch circuit.The super capacitor charges and to need the circuit of power down protection to provide voltage and discharged in power circuit power down when electric on power circuit; when the charging voltage of super capacitor meets the first preparatory condition; first switch circuit is opened; when the discharge voltage of super capacitor meets the second preparatory condition, the shut-off of first switch circuit.The power down protection control circuit cost is low, easy to use, avoids circuit and the situation for opening judgement repeatedly occurs.
Description
Technical field
The utility model is related to technical field of automatic control, in particular to a kind of power down protection control circuit and
Electronic equipment.
Background technology
In the application scenarios of industrial products, it is a kind of " just needing " frequently to descend electricity, power-off pass equipment, Yi Jitong after shut-down
Crossing danger button makes the actions such as device powers down all be sporadic, has no idea to be controlled.Got over the function of industrial equipment
Coming more powerful, there are many power down sensing elements in industrial products, frequently power-off is catastrophic strike for these elements, because
This needs to leave time margin, and this kind of power down sensing element lower electricity, guarantee data will not can be damaged in an orderly manner.
The product of Industry Control class and meters, internal generally use is circuit arrangement that DC24V turns 5V.It is super at present
Electric capacity as back-up source in system dead electricity for system power supply mainly using BOOST boost approach, for super capacitor
The characteristic of fast charging and discharging designs corresponding peripheral circuit, and electric capacity efficiency is improved using BOOST booster circuits, and complete by software
Into detection of power loss, the function of preserving data, close system.This scheme weak point mainly has：First, since it is desired that it is pressure-resistant compared with
Height, the volume of super capacitor is big, is not easy to product miniaturization；Second, without suitable power management, when load changes, power down
Retention time can also follow change, be only applicable to independent not load-carrying product；3rd, it is necessary to extra BOOST booster circuits,
Increase circuit cost；4th, when load disconnects, capacitance voltage bounce-back, cause late-class circuit to turn on repeatedly.
Therefore, when how to solve excessive super capacitor volume existing for power-down protection circuit in existing scheme, power down holding
Between do not know, voltage bounce the problem of causing circuit to open judgement repeatedly, be all that those skilled in the art pay close attention to all the time
Emphasis.
Utility model content
The purpose of this utility model is to provide a kind of power down protection control circuit, deposited with solving existing power-down protection circuit
Circuit cost it is high, voltage bounce causes to open judgement repeatedly the problem of.
The purpose of this utility model, which also resides in, provides a kind of electronic equipment using above-mentioned power down protection control circuit, with solution
The problem of circuit cost existing for certainly existing power-down protection circuit is high, voltage bounce causes to open judgement repeatedly.
To achieve these goals, the technical scheme that the utility model embodiment uses is as follows：
In a first aspect, the utility model embodiment proposes a kind of power down protection control circuit, the power down for electronic equipment
Protection, the electronic equipment include the circuit for needing power down protection.The power down protection control circuit includes power circuit, super
Electric capacity, hysteresis control circuit and first switch circuit, the super capacitor electrically connect with the power circuit, the first switch
Circuit electrically connects with the super capacitor and the circuit for needing power down protection, the hysteresis control circuit and the super electricity
Hold and the first switch circuit electrically connects；The super capacitor is used to charge when electric on the power circuit and is the need
The circuit of power down protection is wanted to provide voltage, the super capacitor is additionally operable to discharge in the power circuit power down, the hysteresis
Control circuit is used to, when the charging voltage of the super capacitor meets the first preparatory condition, control the first switch circuit to beat
Open, and for when the discharge voltage of the super capacitor meets the second preparatory condition, controlling the first switch circuit to close
It is disconnected.
Second aspect, the utility model embodiment also propose a kind of electronic equipment, including need power down protection circuit and
Power down protection control circuit.The power down protection control circuit includes power circuit, super capacitor, hysteresis control circuit and first
On-off circuit, the super capacitor electrically connect with the power circuit, the first switch circuit and the super capacitor and institute
Stating needs the circuit of power down protection to electrically connect, the hysteresis control circuit and the super capacitor and first switch circuit electricity
Connection；The super capacitor is used to charge when electric on the power circuit and provides electricity for the circuit for needing power down protection
Pressure, the super capacitor are additionally operable to discharge in the power circuit power down, and the hysteresis control circuit is used for when described super
When the charging voltage of electric capacity meets the first preparatory condition, the first switch circuit is controlled to open, and for when described super
When the discharge voltage of electric capacity meets the second preparatory condition, the first switch circuit is controlled to turn off.
Compared with the prior art, the utility model has the advantages that：
Power down protection control circuit provided by the utility model include power circuit, super capacitor, hysteresis control circuit and
First switch circuit, the super capacitor electrically connect with the power circuit, the first switch circuit and the super capacitor
Electrically connected with the circuit for needing power down protection, the hysteresis control circuit and the super capacitor and first switch electricity
Road electrically connects.The super capacitor is used to charge when electric on the power circuit and is that the circuit for needing power down protection carries
Voltage supplied, the super capacitor are additionally operable to discharge in the power circuit power down, and the hysteresis control circuit is used for when described
When the charging voltage of super capacitor meets the first preparatory condition, the first switch circuit is controlled to open, and for when described
When the discharge voltage of super capacitor meets the second preparatory condition, the first switch circuit is controlled to turn off.The power down protection controls
Circuit cost is low, easy to use, makes to need the power down sensitive device in the circuit of power down protection to have after power circuit power down
Time enough lower electricity, the and even if voltage bounce of super capacitor can not open first switch circuit in order, so as to avoid
Late-class circuit opens judgement repeatedly.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 shows the functional block diagram for the power down protection control circuit that the utility model first embodiment is provided.
Fig. 2 shows the circuit connection signal of the power circuit that the utility model first embodiment provided and super capacitor
Figure.
Fig. 3 shows the electrical block diagram for the hysteresis control circuit that the utility model first embodiment is provided.
Fig. 4 shows the functional block diagram for the power down protection control circuit that the utility model second embodiment is provided.
Fig. 5 shows the circuit structure signal for the detection of power loss control circuit that the utility model second embodiment is provided
Figure.
Fig. 6 shows the functional block diagram for the electronic equipment that the utility model 3rd embodiment is provided.
Icon：100- power down protection control circuits；200- electronic equipments；110- power circuits；120- super capacitors；130-
Hysteresis control circuit；140- first switch circuits；150- detection of power loss control circuits；160- second switch circuits；210- needs
The circuit of power down protection；220- does not need the circuit of power down protection；230- controllers；The DC circuits of 112- first；114- second
DC circuit.
Embodiment
Below in conjunction with accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole realities
Apply example.The component of the utility model embodiment being generally described and illustrated herein in the accompanying drawings can be come with a variety of configurations
Arrangement and design.Therefore, the detailed description of the embodiment of the present utility model to providing in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of selected embodiment of the present utility model.Based on the utility model
Embodiment, the every other embodiment that those skilled in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.It is meanwhile new in this practicality
In the description of type, term " first ", " second " etc. are only used for distinguishing description, and it is not intended that indicating or implying relatively important
Property.
First embodiment
Fig. 1 is refer to, the functional block diagram of the power down protection control circuit 100 provided by the utility model embodiment.
The power down protection control circuit 100 can be used for the power down protection of electronic equipment, and the electronic equipment includes needing power down protection
Circuit 210.
It should be noted that in the present embodiment, the electronic equipment may be, but not limited to, industrial control equipment, instrument instrument
Table or portable electric appts, the circuit 210 for needing power down protection include at least one power down sensitive device.
In the present embodiment, the power down protection control circuit 100 includes power circuit 110, super capacitor 120, hysteresis
Control circuit 130 and first switch circuit 140, the super capacitor 120 electrically connect with the power circuit 110, and described first
On-off circuit 140 electrically connects with the super capacitor 120 and the circuit 210 for needing power down protection, the hysteresis control electricity
Road 130 electrically connects with the super capacitor 120 and the first switch circuit 140.
As shown in Fig. 2 the circuit connection diagram for the power circuit 110 and super capacitor 120.In the present embodiment
In, the power circuit 110 includes the first DC circuit 112 and electrically connected with first DC circuit 112 second straight
Current circuit 114, the voltage (being in the present embodiment DC24V) of first DC circuit 112 is after DC-DC converts
Obtain the voltage (being in the present embodiment DC5V) of second DC circuit 114, the super capacitor 120 and described second straight
Current circuit 114 is electrically connected to form loop, wherein, one end of the super capacitor 120 and the hysteresis control circuit 130 and institute
State first switch circuit 140 to electrically connect, the other end ground connection of the super capacitor 120.In the present embodiment, by super capacitor
120 are connected in the 5V loops that DC24V turns 5V, and using the super capacitor 120 of low pressure, it is excessive to solve the volume of super capacitor 120
The problem of, be advantageous to the miniaturization of product.
The super capacitor 120 is used to charge when electric on the power circuit 110 and is described to need power down protection
Circuit 210 provides voltage, and the super capacitor 120 is additionally operable to discharge in 110 power down of power circuit.
The hysteresis control circuit 130 is used for when the charging voltage of the super capacitor 120 meets the first preparatory condition,
The first switch circuit 140 is controlled to open, and for meeting the second default bar when the discharge voltage of the super capacitor 120
During part, the first switch circuit 140 is controlled to turn off.
Specifically, in the present embodiment, charged to the super capacitor 120 when electric on the power circuit 110, work as institute
It is described when stating the voltage of super capacitor 120 and being more than or equal to first threshold (i.e. cut-in voltage, taking 4.7V in the present embodiment)
Hysteresis control circuit 130 controls the first switch circuit 140 to open, so that the super capacitor 120 is opened by described first
Powered-down road 140 is that the circuit 210 for needing power down protection is powered and then ensures the circuit 210 for needing power down protection just
Often work.When the power circuit 110 is cut off, the super capacitor 120 starts to be allowed to discharge through the first switch circuit
140 persistently power to the circuit 210 for needing power down protection, when the discharge voltage of super capacitor 120 is less than Second Threshold (i.e.
Voltage is turned off, takes 3.7V in the present embodiment) when, the hysteresis control circuit 130 controls the first switch circuit 140 to close
Disconnected, the circuit 210 for needing power down protection is stopped.Now, because the load of the periphery of super capacitor 120 diminishes, super electricity
Holding 120 voltage can rebound, but bounce voltage, not over cut-in voltage 4.7V, avoiding voltage bounce causes late-class circuit
The appearance of estimate of situation is opened repeatedly.
Therefore, the power down protection control circuit 100 that the present embodiment is provided is described super in 110 power down of power circuit
Electric capacity 120 persistently can power a period of time to the circuit 210 for needing power down protection, allow the circuit for needing power down protection
Power down sensitive device in 210 has time enough lower electricity in order, avoids power down sensitive device from being damaged, and solve
The problem of voltage bounce causes the circuit to open judgement repeatedly.
As shown in figure 3, the electrical block diagram for the hysteresis control circuit 130.The hysteresis control circuit 130 wraps
Include first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the first electric capacity C1, diode D1 and the first voltage stabilizing two
Pole pipe Q1, the first resistor R1 and the second resistance R2 are series at the output end and ground of the first switch circuit 140
Between, the 3rd resistor R3 and the first voltage-regulator diode Q1 is series at the output end and ground of the first switch circuit 140
Between；The reference edge R and the diode D1 of the first voltage-regulator diode Q1 negative electrode are electrically connected to the first resistor
Between R1 and the second resistance R2, the anode of the diode D1 passes through the 4th resistance R4 and the super capacitor 120
One end electrical connection, the both ends of the first electric capacity C1 anode A and reference edge the R electricity with the first voltage-regulator diode Q1 respectively
Connection.
In the present embodiment, the first switch circuit 140 is the first FET, and first FET is P ditches
Road FET, the source electrode of first FET electrically connect with one end of the super capacitor 120, first field-effect
The grid of pipe and the first voltage-regulator diode Q1 negative electrode K are electrically connected to the hysteresis control circuit 130 as described first
FET provide enable signal POMS_EN, first FET drain electrode (i.e. above-mentioned first switch circuit 140 it is defeated
Go out end) electrically connected with the circuit 210 for needing power down protection.
In the present embodiment, the control principle of the hysteresis control circuit 130 is as follows：When the voltage of super capacitor 120 is big
When first threshold (such as 4.7V), the first voltage-regulator diode Q1 is turned on, now first FET
Conducting, the super capacitor 120 are powered by first FET to the circuit 210 for needing power down protection.It is described
After the power down of power circuit 110, the super capacitor 120 starts to discharge, when the discharge voltage of the super capacitor 120 is less than second
During threshold value (such as 3.7V), the first voltage-regulator diode Q1 cut-offs, now the first FET cut-off, the super electricity
Hold 120 to power to the circuit 210 for needing power down protection by first FET.
Second embodiment
Fig. 4 is refer to, the functional module of the power down protection control circuit 100 provided by the utility model second embodiment
Figure.Compared with first embodiment, the power down protection control circuit 100 that second embodiment is provided also includes detection of power loss control
Circuit 150 and second switch circuit 160, the electronic equipment also include the circuit 220 for not needing power down protection, and described second opens
Powered-down road 160 electrically connects with the first switch circuit 140 and the circuit 220 for not needing power down protection, the power down inspection
Survey control circuit 150 to electrically connect with the power circuit 110 and the second switch circuit 160, the second switch circuit 160
Open when electric on the power circuit 110；The detection of power loss control circuit 150 is used to detect the power circuit
During 110 power down, the second switch circuit 160 is controlled to turn off.
Specifically, on the power circuit 110 after electricity, when the charging voltage of the super capacitor 120 meets that first is default
The first switch circuit 140 is caused to open during condition, the super capacitor 120 passes through the first switch circuit 140 and
Two on-off circuits 160 are not needing the circuit 220 of power down protection just to not needing the circuit 220 of power down protection to power with guarantee
Often work.After 110 power down of power circuit, the detection of power loss control circuit 150 controls the second switch circuit 160
Shut-off, now the circuit 220 of power down protection is not needed to be stopped without the supply voltage of super capacitor 120, and first
On-off circuit 140 does not immediately turn off, super capacitor 120 can be continuously need power down protection circuit 210 power one section when
Between.
As shown in figure 5, the electrical block diagram for the detection of power loss control circuit 150.In the present embodiment, it is described
Detection of power loss control circuit 150 includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the second voltage stabilizing two
Pole pipe Q2 and photoelectrical coupler U1, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 are series at the power circuit
Between ground, the 8th resistance R8 is electrically connected to described 110 (being specially the first DC circuit 112 in power circuit 110)
Between power circuit 110 and the photoelectrical coupler U1 first end, negative electrode K and the light of the second voltage-regulator diode Q2
Electric coupler U1 the second end electrical connection, the anode A ground connection of the second voltage-regulator diode Q2, the second voltage-regulator diode Q2
Reference edge R be electrically connected between the 6th resistance R6 and the 7th resistance R7, the second switch circuit 160 with it is described
Photoelectrical coupler U1 the 3rd end electrical connection, the 4th end ground connection of the photoelectrical coupler U1.
In the present embodiment, the second switch circuit 160 is the second FET, and second FET is P ditches
Road FET, the source electrode of second FET electrically connect with the first switch circuit 140, second FET
Grid and the photoelectrical coupler U1 the 3rd end be electrically connected to the detection of power loss control circuit 150 as described second
Effect pipe provides enable signal PWR_DROP, the drain electrode of second FET and the circuit for not needing power down protection
220 electrical connections.In the present embodiment, the source electrode of second FET electrically connects with the drain electrode of first FET.
Further, the detection of power loss control circuit 150 also includes the 9th resistance R9, the second electric capacity C2 and the 3rd electric capacity
C3, the 9th resistance R9 are electrically connected between one end of the super capacitor 120 and the grid of second FET.Institute
The both ends for stating the second electric capacity C2 electrically connect with the reference edge R and anode A of the second voltage-regulator diode Q2 respectively, the 3rd electricity
Hold C3 to be electrically connected between the 9th resistance R9 and ground.
In the present embodiment, the photoelectrical coupler U1 mainly includes light emitting diode and phototriode, wherein, it is described
The anode of light emitting diode is above-mentioned middle photoelectrical coupler U1 first end, and the negative electrode of the light emitting diode is above-mentioned middle photoelectricity
Coupler U1 the second end, the extremely above-mentioned middle photoelectrical coupler U1 of current collection of the phototriode the 3rd end are described photosensitive
The extremely above-mentioned middle photoelectrical coupler U1 of transmitting of triode the 4th end.
In the present embodiment, the control principle of the detection of power loss control circuit 150 is as follows：When the power circuit 110
When upper electric, the second voltage-regulator diode Q2 conducting, LEDs ON in the photoelectrical coupler U1 and light, it is photosensitive
Triode is turned on by electric current is produced after illumination, and now the second FET conducting, the super capacitor 120 pass through institute
The first FET and second FET is stated to power to the circuit 220 for not needing power down protection.The power supply electricity
After the power down of road 110, the three or two pole Q2 pipes end, the light emitting diode cut-off in the photoelectrical coupler U1, photosensitive three pole
Pipe ends, second FET cut-off, even if now the super capacitor 120 by first FET to described
The continued power of circuit 210 of power down protection is needed, but because the second FET is not turned on, it is described not need power down protection
Circuit 220 be stopped without the supply voltage of super capacitor 120.
3rd embodiment
Fig. 6 is refer to, the functional block diagram of the electronic equipment 200 provided by the utility model 3rd embodiment.It is described
Electronic equipment 200 includes the circuit 220 and power down protection control electricity for needing the circuit 210 of power down protection, not needing power down protection
Road 100, compared with the power down protection control circuit 100 of second embodiment, difference is protected in the power down in 3rd embodiment
Shield control circuit 100 also includes controller 230, and the controller 230 falls with the detection of power loss control circuit 150 and needs
The circuit 210 of electric protection electrically connects.When the detection of power loss control circuit 150 is used to detect 110 power down of power circuit
Power down information is sent to the controller 230, the controller 230 is used to need by described when receiving the power down information
Power down sensitive device in the circuit 210 of electric protection is set as write-protect, in time to be stored important data.
In summary, the power down protection control circuit and electronic equipment that the utility model embodiment is provided, the power down are protected
Shield control circuit is opened including power circuit, super capacitor, hysteresis control circuit, first switch circuit, power-fail detection circuit, second
Powered-down road and controller, the super capacitor electrically connect with the power circuit, the first switch circuit with it is described super
Electric capacity and the circuit for needing power down protection are electrically connected, and the hysteresis control circuit is opened with the super capacitor and described first
Powered-down road electrical connection, the second switch circuit are electrically connected with the first switch circuit and the circuit for not needing power down protection
Connect, the detection of power loss control circuit electrically connects with the power circuit and the second switch circuit, the controller and institute
State detection of power loss control circuit and the circuit for needing power down protection electrically connects.The power circuit is given when upper electricity is initial
The super capacitor charges, and is opened when electric in the second switch circuit defaults, when the voltage of the super capacitor meets first
The first switch circuit is opened during preparatory condition, and now the super capacitor is to the circuit for needing power down protection and described
The circuit power supply of power down protection is not needed.When the power circuit power down, the detection of power loss control circuit detects power down
The control second switch circuit shut-off is controlled, while power down information is sent to controller, the controller is receiving
The power down sensitive device in the circuit for needing power down protection is set as write-protect when stating power down information, now super electricity
Appearance starts to be allowed to discharge through the first switch circuit persistently to power to the circuit for needing power down protection, when the super electricity
When the voltage of appearance meets the second preparatory condition, the hysteresis control circuit controls the first switch circuit shut-off.Due to super
Electric capacity has the presence of internal resistance, and its periphery load becomes hour, voltage bounce rise, but bounce voltage can not make first switch electric
Road is opened, and so avoids occur situation about turning on repeatedly in circuit.The power down protection that the utility model embodiment is provided
Control circuit and electronic equipment have the advantages of cost is low, easy to use, control system is stable, while also solve super capacitor
The problem of volume is excessive, voltage bounce causes circuit to turn on repeatedly, the output of the second DC circuit, which is divided into, needs power down to protect
The circuit of shield and the circuit for not needing power down protection, the failure retention time of circuit is improved, it is uncertain to solve power down time
Problem.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of elements not only include those
Key element, but also the other element including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including the key element, method, article or equipment also be present.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.It should be noted that
Arrive：Similar label and letter represents similar terms in following accompanying drawing, therefore, once determined in a certain Xiang Yi accompanying drawing
Justice, then it further need not be defined and explained in subsequent accompanying drawing.
Claims (10)
1. a kind of power down protection control circuit, for the power down protection of electronic equipment, the electronic equipment includes needing power down to protect
The circuit of shield, it is characterised in that the power down protection control circuit include power circuit, super capacitor, hysteresis control circuit and
First switch circuit, the super capacitor electrically connect with the power circuit, the first switch circuit and the super capacitor
Electrically connected with the circuit for needing power down protection, the hysteresis control circuit and the super capacitor and first switch electricity
Road electrically connects；
The super capacitor is used to charge when electric on the power circuit and provides electricity for the circuit for needing power down protection
Pressure, the super capacitor are additionally operable to discharge in the power circuit power down, and the hysteresis control circuit is used for when described super
When the charging voltage of electric capacity meets the first preparatory condition, the first switch circuit is controlled to open, and for when described super
When the discharge voltage of electric capacity meets the second preparatory condition, the first switch circuit is controlled to turn off.
2. power down protection control circuit as claimed in claim 1, it is characterised in that the hysteresis control circuit includes the first electricity
Resistance, second resistance, 3rd resistor, the 4th resistance, diode and the first voltage-regulator diode, the first resistor and second electricity
Resistance is series between output end and the ground of the first switch circuit, and the 3rd resistor is connected with first voltage-regulator diode
Between the output end of the first switch circuit and ground；The reference edge of first voltage-regulator diode and the moon of the diode
Pole is electrically connected between the first resistor and the second resistance, the anode of the diode by the 4th resistance with
The super capacitor electrical connection.
3. power down protection control circuit as claimed in claim 2, it is characterised in that the first switch circuit is first effect
Ying Guan, the source electrode of first FET electrically connect with the super capacitor, the grid of first FET with it is described
The negative electrode electrical connection of first voltage-regulator diode, the drain electrode of first FET are electrically connected with the circuit for needing power down protection
Connect.
4. power down protection control circuit as claimed in claim 1, it is characterised in that the electronic equipment also includes falling
The circuit of electric protection, the power down protection control circuit also include detection of power loss control circuit and second switch circuit, and described
Two on-off circuits electrically connect with the first switch circuit and the circuit for not needing power down protection, the detection of power loss control
Circuit electrically connects with the power circuit and the second switch circuit, and the second switch circuit is electric on the power circuit
When open；The detection of power loss control circuit is used for when detecting the power circuit power down, controls the second switch electricity
Road turns off.
5. power down protection control circuit as claimed in claim 4, it is characterised in that the detection of power loss control circuit includes the
Five resistance, the 6th resistance, the 7th resistance, the 8th resistance, the second voltage-regulator diode and photoelectrical coupler, the 5th resistance,
Six resistance, the 7th resistant series between the power circuit and ground, the 8th resistance be electrically connected to the power circuit with
Between the first end of the photoelectrical coupler, the negative electrode of second voltage-regulator diode and the second end electricity of the photoelectrical coupler
Connection, the plus earth of second voltage-regulator diode, the reference edge of second voltage-regulator diode are electrically connected to the described 6th
Between resistance and the 7th resistance, the second switch circuit electrically connects with the 3rd end of the photoelectrical coupler, the light
The 4th end ground connection of electric coupler.
6. power down protection control circuit as claimed in claim 5, it is characterised in that the second switch circuit is second effect
Ying Guan, the source electrode of second FET electrically connect with the first switch circuit, the grid of second FET with
The 3rd end electrical connection of the photoelectrical coupler, the drain electrode of second FET and the circuit for not needing power down protection
Electrical connection.
7. power down protection control circuit as claimed in claim 6, it is characterised in that the detection of power loss control circuit also includes
9th resistance, the 9th resistance are electrically connected between the grid of the super capacitor and second FET.
8. power down protection control circuit as claimed in claim 1, it is characterised in that the power circuit includes the first direct current
Road and the second DC circuit electrically connected with first DC circuit, the voltage of first DC circuit turn by direct current
The voltage of second DC circuit is obtained after DC converting, the super capacitor is electrically connected with shape with second DC circuit
Into loop.
9. a kind of electronic equipment, including need the circuit and power down protection control circuit of power down protection, it is characterised in that it is described fall
Electric protection control circuit includes power circuit, super capacitor, hysteresis control circuit and first switch circuit, the super capacitor with
The power circuit electrical connection, the first switch circuit are electrically connected with the super capacitor and the circuit for needing power down protection
Connect, the hysteresis control circuit electrically connects with the super capacitor and the first switch circuit；
The super capacitor is used to charge when electric on the power circuit and provides electricity for the circuit for needing power down protection
Pressure, the super capacitor are additionally operable to discharge in the power circuit power down, and the hysteresis control circuit is used for when described super
When the charging voltage of electric capacity meets the first preparatory condition, the first switch circuit is controlled to open, and for when described super
When the discharge voltage of electric capacity meets the second preparatory condition, the first switch circuit is controlled to turn off.
10. electronic equipment as claimed in claim 9, it is characterised in that the power down protection control circuit also includes power down and examined
Survey control circuit and the controller that is electrically connected with the detection of power loss control circuit, the detection of power loss control circuit with it is described
Power circuit electrically connects, and the controller electrically connects with the circuit for needing power down protection；The detection of power loss control circuit
For sending power down information to the controller when detecting the power circuit power down, the controller is used for receiving
The power down sensitive device in the circuit for needing power down protection is set as write-protect when stating power down information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720826535.3U CN206922502U (en) | 2017-07-07 | 2017-07-07 | Power down protection control circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720826535.3U CN206922502U (en) | 2017-07-07 | 2017-07-07 | Power down protection control circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206922502U true CN206922502U (en) | 2018-01-23 |
Family
ID=61335921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720826535.3U Active CN206922502U (en) | 2017-07-07 | 2017-07-07 | Power down protection control circuit and electronic equipment |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009229A (en) * | 2021-03-16 | 2021-06-22 | 东风汽车集团股份有限公司 | Detection circuit and detection method for automobile insulation resistance value |
| CN116719669A (en) * | 2023-08-09 | 2023-09-08 | 苏州浪潮智能科技有限公司 | Super capacitor calibration method, alarm method and device and disk array card |
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2017
- 2017-07-07 CN CN201720826535.3U patent/CN206922502U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009229A (en) * | 2021-03-16 | 2021-06-22 | 东风汽车集团股份有限公司 | Detection circuit and detection method for automobile insulation resistance value |
| CN116719669A (en) * | 2023-08-09 | 2023-09-08 | 苏州浪潮智能科技有限公司 | Super capacitor calibration method, alarm method and device and disk array card |
| CN116719669B (en) * | 2023-08-09 | 2023-11-03 | 苏州浪潮智能科技有限公司 | Super capacitor calibration method, alarm method and device and disk array card |
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