CN106774589A - Stable-pressure device and guard method, communication bus supply unit - Google Patents
Stable-pressure device and guard method, communication bus supply unit Download PDFInfo
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- CN106774589A CN106774589A CN201611250969.XA CN201611250969A CN106774589A CN 106774589 A CN106774589 A CN 106774589A CN 201611250969 A CN201611250969 A CN 201611250969A CN 106774589 A CN106774589 A CN 106774589A
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- 238000004891 communication Methods 0.000 title claims abstract description 14
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
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Abstract
A kind of stable-pressure device and guard method, communication bus supply unit are the embodiment of the invention provides, belongs to electronic technology apparatus field.Wherein, stable-pressure device includes：Voltage stabilizing module, protection module and VRM Voltage Regulator Module.The input of Voltage stabilizing module is used for and external power source coupling; the output end of Voltage stabilizing module is coupled with the input of protection module; the output end of protection module is used to be coupled with external loading; first control end of VRM Voltage Regulator Module is coupled with the output end of protection module, and the second control end of VRM Voltage Regulator Module is coupled with the output end of Voltage stabilizing module and adjustable side respectively.After external loading short circuit; even if the voltage of voltage regulation of Voltage stabilizing module output is applied in protection module entirely; the power of protection module is also not more than the rated power of itself, and circuit will not be damaged, and then the prolonged overvoltage of stable-pressure device, overcurrent protection can be realized after external loading short circuit.Therefore, the functions such as the excessively stream of stable-pressure device, overtemperature protection are greatly improved.
Description
Technical field
The present invention relates to electronic technology apparatus field, in particular to a kind of stable-pressure device and guard method, communicate total
Line supply unit.
Background technology
Stable-pressure device carries out the electronic installation that voltage stabilizing provides burning voltage to load, its output voltage by by input power
Do not change because of the fluctuation of line voltage.
At present, the changeless stable-pressure device of the stable-pressure device of in the market generally output voltage, due to output voltage
Non-adjustable cause its restricted application.With the technology development and progress of stable-pressure device, in the market also occurs in that some are defeated
Go out the adjustable adjustable stable-pressure device of voltage, adjustable stable-pressure device can realize the regulation on a large scale of voltage and current.Existing
Have in technology, stable-pressure device and adjustable stable-pressure device are respectively provided with the functions such as excessively stream, overtemperature protection such that it is able to realize that short circuit is protected
Shield.However, being stable-pressure device or adjustable stable-pressure device, during short-circuit protection, its internal voltage stabilizing chip can largely generate heat.
If prolonged short circuit, then the voltage stabilizing chip of inside can be caused to overheat, easily cause the wafer damage inside stable-pressure device.
Therefore, how after short circuit, it is mesh that can effectively improve the functions such as the excessively stream of stable-pressure device, overtemperature protection
Preceding industry a great problem.
The content of the invention
In view of this, it is an object of the invention to provide a kind of stable-pressure device and guard method, communication bus supply unit,
It can effectively improve the functions such as excessively stream, the overtemperature protection of stable-pressure device.
What embodiments of the invention were realized in：
In a first aspect, the embodiment of the invention provides a kind of stable-pressure device, the stable-pressure device includes：Voltage stabilizing module, guarantor
Shield module and VRM Voltage Regulator Module.The input of the Voltage stabilizing module be used for and external power source coupling, the Voltage stabilizing module it is defeated
Go out end to be coupled with the input of the protection module, the output end of the protection module is used to be coupled with external loading, the electricity
The first control end of adjustment module is pressed to be coupled with the output end of the protection module, the second control end of the VRM Voltage Regulator Module
Output end with the Voltage stabilizing module is coupled, the 3rd control end of the VRM Voltage Regulator Module and the adjustable side of the Voltage stabilizing module
Coupling.The protection module, for when the external loading is short-circuit, bearing the voltage of now Voltage stabilizing module output, to protect
The Voltage stabilizing module.The VRM Voltage Regulator Module, for when the external loading is short-circuit, adjusting the Voltage stabilizing module output end
Voltage so that the power for being input into the protection module is not more than the rated power of the protection module.
Second aspect, the embodiment of the invention provides a kind of guard method, be applied to the stable-pressure device, methods described bag
Include：During the external loading short circuit, the protection module bears the voltage of now Voltage stabilizing module output, to protect the voltage stabilizing
Module.During the external loading short circuit, the VRM Voltage Regulator Module adjusts the voltage of the Voltage stabilizing module output end, so that input
The power of the protection module is not more than the rated power of the protection module.
The third aspect, the embodiment of the invention provides a kind of communication bus supply unit, the communication bus supply unit
Including：COM1 and the stable-pressure device, the output end of the stable-pressure device are coupled with the power end of the COM1.
The beneficial effect of the embodiment of the present invention is：
The input of Voltage stabilizing module is used to be obtained by the coupling with external power source the input voltage of power network.By voltage stabilizing
The output end of module is coupled with the input of protection module, and the output end of protection module is used further to be coupled with external loading, voltage stabilizing
Module can be exported to outside load the voltage of voltage regulation output after voltage stabilizing to protection module, then by protection module.By electricity
The first control end of adjustment module is pressed to be coupled with the output end of protection module, the second control end and the voltage stabilizing mould of VRM Voltage Regulator Module
The output end coupling of block, and VRM Voltage Regulator Module the 3rd control end and Voltage stabilizing module adjustable side coupling so that voltage stabilizing
Device forms the closed-loop control of signal.
In external loading short circuit, VRM Voltage Regulator Module just can adjust the voltage of Voltage stabilizing module output end so that voltage stabilizing
The voltage of voltage regulation value reduction that module output end is exported, even if the voltage of voltage regulation of Voltage stabilizing module output has been applied to protection module entirely
On, the actual power of protection module is not more than the rated power of protection module itself so that circuit will not be damaged, and then outside
Just the prolonged overvoltage of stable-pressure device, overcurrent protection can be realized after section load short circuit.Therefore, stable-pressure device is greatly improved
Excessively stream, the function such as overtemperature protection.
Other features and advantages of the present invention will illustrate in subsequent specification, also, partly become from specification
It is clear that or being understood by implementing the embodiment of the present invention.The purpose of the present invention and other advantages can be by being write
Specifically noted structure is realized and obtained in specification, claims and accompanying drawing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.By the way that shown in accompanying drawing, above and other purpose of the invention, feature and advantage will become apparent from.In whole
Identical reference indicates identical part in accompanying drawing.Deliberately accompanying drawing, emphasis are not drawn by actual size equal proportion scaling
It is that purport of the invention is shown.
Fig. 1 shows a kind of structured flowchart of communication bus supply unit provided in an embodiment of the present invention；
Fig. 2 shows a kind of first structure block diagram of stable-pressure device provided in an embodiment of the present invention；
Fig. 3 shows a kind of the second structured flowchart of stable-pressure device provided in an embodiment of the present invention；
Fig. 4 shows a kind of circuit diagram of stable-pressure device provided in an embodiment of the present invention；
Fig. 5 shows a kind of flow chart of guard method provided in an embodiment of the present invention.
Icon：100- stable-pressure devices；110- Voltage stabilizing modules；120- protection modules；130- VRM Voltage Regulator Modules；131- first
On-off circuit；132- second switch circuits；200- communication bus supply units；210- COM1s.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
A part of embodiment of the present invention, rather than whole embodiments.Present invention implementation generally described and illustrated in accompanying drawing herein
The component of example can be arranged and designed with a variety of configurations.
Therefore, the detailed description of embodiments of the invention below to providing in the accompanying drawings is not intended to limit claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
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 in individual accompanying drawing, then it need not be further defined and explained in subsequent accompanying drawing.
In the description of the invention, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, without being understood that
To indicate or implying relative importance.And in the description of the invention, in addition it is also necessary to explanation, unless otherwise clearly regulation and
Limit, term " connection ", " coupling " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or
It is integrally connected；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to by between intermediary
Connect connected, can be two connections of element internal.For the ordinary skill in the art, can be understood with concrete condition
Above-mentioned term concrete meaning in the present invention.
Fig. 1 is referred to, a kind of communication bus supply unit 200 is the embodiment of the invention provides, communication bus power supply dress
Putting 200 includes：COM1 210 and stable-pressure device 100.The outside that communication bus supply unit 200 can be coupled by bus
Load provides electric energy, and the output end of COM1 210 can be coupled by bus with external loading, the output of stable-pressure device 100
End couples with the power end of COM1 210, therefore the control source that stable-pressure device 100 can stably is in COM1 210,
Ensure COM1 210 coupled with external loading after working power needed for normal work.
Fig. 2 is referred to, in a kind of stable-pressure device 100 provided in an embodiment of the present invention, the stable-pressure device 100 includes：Surely
Die block 110, protection module 120 and VRM Voltage Regulator Module 130.
Voltage stabilizing module 110 is used to obtain the input voltage of external power source, wherein, the input voltage of external power source can be electricity
Net input voltage.Input voltage is carried out voltage stabilizing and exports voltage of voltage regulation through output end to after preset value by Voltage stabilizing module 110.Wherein,
The voltage of voltage regulation value that preset value is exported by the normal work of Voltage stabilizing module 110.
Protection module 120 is used to be obtained when external loading normal work the voltage of voltage regulation of the output of Voltage stabilizing module 110, and
External loading is arrived in the voltage of voltage regulation output that will be got.When external loading short circuit, the voltage stabilizing electricity exported by Voltage stabilizing module 110
Pressure is all applied in the protection module 120, so as to form the protection to Voltage stabilizing module 110.
VRM Voltage Regulator Module 130 is used to, when external loading normal work, ensure that Voltage stabilizing module 110 and protection module
120 normal work；When external loading short circuit, the voltage of the output end of Voltage stabilizing module 110 can be adjusted, make Voltage stabilizing module 110
The voltage of voltage regulation value reduction of output, and then cause that the voltage of voltage regulation of the output of Voltage stabilizing module 110 is all applied to the protection module 120
Afterwards, its actual power is not more than protection module 120 rated power of itself.Therefore the power of the output of Voltage stabilizing module 110 applies entirely
In protection module 120, spilling will not be formed, so that Voltage stabilizing module 110 is protected.When external loading recovers normal work
When making, VRM Voltage Regulator Module 130 can also adjust the voltage of the output end of Voltage stabilizing module 110 so that the output end of Voltage stabilizing module 110 is defeated
The voltage of voltage regulation for going out returns to preset value, and stable-pressure device 100 has also recovered normal work.
Fig. 3 is referred to, VRM Voltage Regulator Module 130 includes：First switch circuit 131 and second switch circuit 132.First opens
First control end on powered-down road 131 is the first control end of VRM Voltage Regulator Module 130, the first control of first switch circuit 131
End couples with the output end of protection module 120.Second control end of first switch circuit 131 is the of VRM Voltage Regulator Module 130
Two control ends.The input coupling of second control end and protection module 120 of first switch circuit 131, first switch circuit 131
The 3rd control end coupled with the first control end of second switch circuit 132.Second control end of second switch circuit 132 is also made
It is the second control end of VRM Voltage Regulator Module 130, the second control end of second switch circuit 132 and the output of Voltage stabilizing module 110
End coupling.3rd control end of second switch circuit 132 is the 3rd control end and and Voltage stabilizing module of VRM Voltage Regulator Module 130
110 adjustable sides couple.
Used as a kind of mode, when external loading normal work, first switch circuit 131 can be turned on so that second opens
End on powered-down road 132, it is ensured that the normal work of stable-pressure device 100 simultaneously exports the voltage of voltage regulation of preset value.When external loading short circuit
When, first switch circuit 131 can end so that second switch circuit 132 is turned on, the input protection module 120 of Voltage stabilizing module 110
Voltage of voltage regulation reduction, therefore the actual power of protection module 120 is not more than protection module 120 rated power of itself.Voltage stabilizing module
The power of 110 outputs is applied in protection module 120 entirely, will not form spilling.And when external loading recovers normal work, the
One on-off circuit 131 can be turned on again, so that second switch circuit 132 ends again, so that the output of stable-pressure device 100 is steady
Piezoelectricity pressure returns to preset value, and stable-pressure device 100 also recovers normal work.
Fig. 4 and Fig. 3 is referred to, Voltage stabilizing module 110 includes：Voltage stabilizing chip U1, the first electric capacity C1 and the first diode D1.Surely
The input IN of pressure chip U1 is the input of Voltage stabilizing module 110, and the input IN of voltage stabilizing chip U1 is provided with connectivity port a, with
It is easy to be coupled with external power source.The input IN couplings of one end and voltage stabilizing chip U1 of the first electric capacity C1, the first electric capacity C1's is another
One end is filtered by ground connection to input voltage.The adjustable side ADJ of voltage stabilizing chip U1 is the adjustable side of Voltage stabilizing module 110, surely
The output end OUT of pressure chip U1 is the output end of Voltage stabilizing module 110.The output end OUT and VRM Voltage Regulator Module of voltage stabilizing chip U1
The second control end 130 couple, the 3rd control end coupling of the adjustable side ADJ of voltage stabilizing chip U1 and VRM Voltage Regulator Module 130.The
The output end OUT couplings of the anode tap and voltage stabilizing chip U1 of one diode D1, the cathode terminal and voltage stabilizing chip of the first diode D1
The input IN couplings of U1.If the voltage of input IN of the voltage of the output end OUT of voltage stabilizing chip U1 higher than voltage stabilizing chip U1
When, the first diode D1 is prevented from voltage stabilizing chip U1 and produces voltage instead to fill and damage voltage stabilizing chip U1.
Protection module 120 includes：Power resistor R7.Used as a kind of mode, protection module 120 can be power resistor R7,
The power-type equipment of output voltage can be born for other, is not specifically limited herein.The input conduct of power resistor R7
The input of protection module 120, the input of power resistor R7 is coupled and power resistor with the output end OUT of voltage stabilizing chip U1
The output end of R7 as protection module 120 output end, it is provided with connectivity port b in order to be coupled with external loading.In this reality
Apply in example, in external loading normal work, the resistance of power resistor R7 is smaller, therefore the partial pressure of power resistor R7 is not interfered with
The voltage of voltage regulation that Voltage stabilizing module 110 is exported, i.e. Voltage stabilizing module 110 can export the voltage of voltage regulation of preset value.
First switch circuit 131 includes：First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, first
Triode Q1 and the second electric capacity C2.One end of first resistor R1 as first switch circuit 131 the first control end, itself and power
The output end coupling of resistance R7, the other end of first resistor R1 one end respectively with second resistance R2 and the base of the first triode Q1
Pole couples.The other end of second resistance R2 is grounded with the emitter stage of the first triode Q1.One end of second electric capacity C2 is also with
The base stage coupling of one triode Q1, the other end of the second electric capacity C2 is then by being grounded formation filtering and cushioning effect.3rd resistor
The colelctor electrode coupling of one end of R3 and the first triode Q1, the other end of 3rd resistor R3 is used as the of first switch circuit 131
Three control ends, it is coupled with the first control end of second switch circuit 132.One end of 4th resistance R4 and the one of 3rd resistor R3
End coupling, the other end of the 4th resistance R4 is then as the second control end of first switch circuit 131, and it is defeated with power resistor R7
Enter end coupling.
Second switch circuit 132 includes：5th resistance R5, the 6th resistance R6, the 3rd electric capacity C3, the 4th electric capacity C4 and second
Triode Q2.The base stage of the second triode Q2 as second switch circuit 132 the first control end, itself and first switch circuit
131 the 3rd control end coupling, the colelctor electrode of the second triode Q2 one end then respectively with the 6th resistance R6 and voltage stabilizing chip U1
Adjustable side ADJ coupling.The other end of the 6th resistance R6 as second switch circuit 132 the second control end, itself and voltage stabilizing core
The output end OUT couplings of piece U1.The emitter stage of the second triode Q2 and one end of the 5th resistance R5 are grounded.5th resistance R5's
Then as the 3rd control end of second switch circuit 132, it is coupled the other end with the adjustable side ADJ of voltage stabilizing chip U1.As another
A kind of mode, the output voltage for ease of voltage stabilizing chip is adjustable, and the 5th resistance R5 is adjustable resistance.One end of 3rd electric capacity C3 with
The base stage coupling of the second triode Q2, the other end of the 3rd electric capacity C3 then forms filtering and cushioning effect by ground connection.4th
One end of electric capacity C4 is also coupled with the output end OUT of voltage stabilizing chip U1, and the other end of the 4th electric capacity C4 is formed also by ground connection
Filtering and cushioning effect.
In the present embodiment, when external loading normal work, the output end OUT of voltage stabilizing chip U1 can export voltage stabilizing electricity
Pressure, due to the far smaller than first resistor R1 and the 4th resistance R4 of power resistor R7, the voltage of connectivity port b can be voltage stabilizing chip
The voltage of voltage regulation of U1 outputs.By first resistor R1 and the partial pressure of second resistance R2, the magnitude of voltage of second resistance R2 one end is more than
Equal to the conducting voltage of the first triode Q1, the first triode Q1 is switched on and is in saturation state.First triode Q1 saturations
Afterwards, the voltage of the collector and emitter of the first triode Q1 after 3rd resistor R3 partial pressures by being insufficient to allow the second triode
Q2 is turned on.Second triode Q2 is in cut-off state, therefore enables to the output of voltage stabilizing chip U1 not receive first switch circuit 131
With the influence of second switch circuit 132, and normal voltage of voltage regulation is exported.
When external loading short circuit, i.e. connectivity port b short circuits.Now, the electricity of connectivity port b and the first triode Q1 base stages
Position is 0, and the first triode Q1 is changed into cut-off state from turning on.Because the first triode Q1 is in cut-off state, the two or three pole
The voltage of pipe Q2 base stages just can be raised, so that the second triode Q2 is turned on, and the state in amplification or saturation.In this implementation
In example, the voltage of voltage regulation of the output end OUT outputs of voltage stabilizing chip U1 can be the voltage and the 6th resistance at the 5th resistance R5 two ends
The voltage sum at R6 two ends.Due to the conducting of the second triode Q2 enable to the second triode Q2 collector and emitter it
Between voltage reduction, therefore the voltage at the 5th resistance R5 two ends is also pulled low.By the conducting of the second triode Q2, then can make
Obtain the voltage of voltage regulation reduction of the output end OUT outputs of voltage stabilizing chip U1.Further, since the current potential of connectivity port b points is 0, i.e., surely
The voltage of voltage regulation of the output end OUT outputs of pressure chip U1 has all been applied on power resistor R7.Due to the second triode Q2's
Conducting, and reduce voltage of voltage regulation.Voltage of voltage regulation after reduction enables to be applied to the actual work(produced by power resistor R7
Rate is not larger than the rated power of power resistor R7, thus power resistor R7 can obtain voltage stabilizing chip U1 whole power outputs and
Ensure that circuit will not be damaged, and then the protection to Voltage stabilizing module 110 is formed after external loading short circuit.
When external loading just starts to recover normal work, also due to the resistance very little of power resistor R7, connectivity port b's
Voltage is the conducting of the second triode Q2 and the voltage of voltage regulation after reducing.Used as a kind of mode, the voltage of connectivity port b passes through
After the partial pressure of first resistor R1 and second resistance R2, the voltage at second resistance R2 two ends is still above or equal to the first triode Q1
Conducting voltage.Therefore after external loading recovers normal work, the first triode Q1 is turned on and is in saturation state again.This
When, the voltage of the second triode Q2 base stages is pulled low due to the saturation of the first triode Q1, and the second triode Q2 ends again.The
The voltage at five resistance R5 two ends rises, and then the voltage of voltage regulation of the output end OUT outputs of voltage stabilizing chip U1 is raised and returned to pre-
If value, voltage stabilizing chip U1 also returns to normal operating conditions.
Therefore, in external loading normal work, controlled at the second triode Q2 by the conducting of the first triode Q1
Normal output voltage of voltage regulation of the voltage stabilizing chip U1 according to preset value is ensure that in cut-off state.And after external loading short circuit,
The second triode Q2 is controlled by the cut-off of the first triode Q1, and in the conduction state can effectively to reduce voltage stabilizing chip U1 defeated
The voltage of voltage regulation for going out, so that voltage of voltage regulation applies specified work(of the power produced by power resistor R7 no more than power resistor R7
Rate, protects so as to be formed to voltage stabilizing chip U1.Again because protection is to be applied to power by by the output voltage of voltage stabilizing chip U1
On resistance R7, so that voltage stabilizing chip U1 will not produce overheat, short circuit for a long time does not result in the damage of voltage stabilizing chip U1 yet.And
After external loading recovers normal work, then the first triode is caused by the partial pressure relation of first resistor R1 and second resistance R2
The recovery of Q1 is turned on and controls the second triode Q2 to end again, and then is caused after short circuit recovers, and voltage stabilizing chip U1 also can
Fast quick-recovery response, and return to normal operating conditions.
Additionally, circuit just can be mainly realized to electricity by the first triode Q1, the second triode Q2 and power resistor R7
The automatic protection on road, and automatic recovery response, are not only simply easy to calculate, and with low cost, reliability is high.Furthermore, due to
5th resistance R5 is adjustable resistance, and the voltage of voltage regulation of voltage stabilizing chip U1 outputs can according to the actual requirements, by the electricity of regulation the 5th
Resistance R5 can be adapted to actual use demand, then cause that the voltage of voltage regulation scope of application of voltage stabilizing chip U1 outputs is broad.
Fig. 5 is referred to, the embodiment of the present invention additionally provides a kind of guard method, is applied to stable-pressure device.The guard method
Including：Step S110 and step S120.
Step S110：During the external loading short circuit, the protection module bears the voltage of now Voltage stabilizing module output,
To protect the Voltage stabilizing module.
Step S120：During the external loading short circuit, the VRM Voltage Regulator Module adjusts the Voltage stabilizing module output end
Voltage, so that the power for being input into the protection module is not more than the rated power of the protection module.
It is apparent to those skilled in the art that, for convenience and simplicity of description, the method for foregoing description
Specific work process, may be referred to the corresponding process in aforementioned means, will not be repeated here.
In sum, a kind of stable-pressure device 100 and guard method, communication bus supply unit be the embodiment of the invention provides
200, wherein, stable-pressure device 100 includes：Voltage stabilizing module 110, protection module 120 and VRM Voltage Regulator Module 130.
The input of Voltage stabilizing module 110 is used to be obtained by the coupling with external power source the input voltage of power network.Pass through
The output end of Voltage stabilizing module 110 is coupled with the input of protection module 120, and the output end of protection module 120 is used further to and outside
Voltage of voltage regulation output after voltage stabilizing can be arrived protection module 120 by load coupling, Voltage stabilizing module 110, then defeated by protection module 120
Go out to outside load.Coupled with the output end of protection module 120 by the first control end of VRM Voltage Regulator Module 130, voltage
Second control end of adjustment module 130 is coupled with the output end of Voltage stabilizing module 110, and VRM Voltage Regulator Module 130 the 3rd control
The coupling of the adjustable side of end processed and Voltage stabilizing module 110, so that stable-pressure device 100 forms the closed-loop control of signal.
In external loading short circuit, VRM Voltage Regulator Module 130 just can adjust the voltage of the output end of Voltage stabilizing module 110, make
The voltage of voltage regulation value reduction that the output end of Voltage stabilizing module 110 is exported is obtained, even if the voltage of voltage regulation of the output of Voltage stabilizing module 110 applies entirely
In protection module 120, the actual power of protection module 120 is not more than protection module 120 rated power of itself so that electricity
Road will not be damaged, and then the prolonged overvoltage of stable-pressure device 100, overcurrent protection just can be realized after external loading short circuit.
Therefore, the functions such as the excessively stream of stable-pressure device 100, overtemperature protection are greatly improved.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of stable-pressure device, it is characterised in that the stable-pressure device includes：Voltage stabilizing module, protection module and voltage-regulation mould
Block, the input of the Voltage stabilizing module is used for and external power source coupling, the output end of the Voltage stabilizing module and the protection module
Input coupling, the output end of the protection module is used to couple with external loading, and the first of the VRM Voltage Regulator Module controls
End processed couples with the output end of the protection module, and the second control end of the VRM Voltage Regulator Module is defeated with the Voltage stabilizing module
Go out end coupling, the 3rd control end of the VRM Voltage Regulator Module is coupled with the adjustable side of the Voltage stabilizing module；
The protection module, for when the external loading is short-circuit, the voltage of now Voltage stabilizing module output being born, to protect
State Voltage stabilizing module；
The VRM Voltage Regulator Module, for when the external loading is short-circuit, adjusting the voltage of the Voltage stabilizing module output end, with
The power of the input protection module is set to be not more than the rated power of the protection module.
2. stable-pressure device according to claim 1, it is characterised in that the VRM Voltage Regulator Module includes：First switch electricity
Road and second switch circuit, the first control end of the first switch circuit is the first control end of the VRM Voltage Regulator Module,
First control end of the first switch circuit is coupled with the output end of the protection module, and the 3rd of the first switch circuit the
Control end is coupled with the first control end of the second switch circuit, the second control end of the first switch circuit and described
Second control end of two on-off circuits is the second control end of the VRM Voltage Regulator Module, the second control of the first switch circuit
Second control end of end processed and the second switch circuit is coupled with the output end of Voltage stabilizing module, the second switch circuit
3rd control end is the 3rd control end of the VRM Voltage Regulator Module, and the 3rd control end of the second switch circuit is steady with described
The adjustable side coupling of die block；
The first switch circuit is used for, and ends when external loading short circuit, so that the second switch circuit turn-on；When
The external loading recovers to be turned on during normal work, so that the second switch circuit ends；
The second switch circuit is used for, and when closed, the voltage of voltage regulation for making the Voltage stabilizing module be input into the protection module drops
Low, the power of the protection module is not more than the rated power of the protection module；When the stable-pressure device recovers normal work
When, the second switch circuit cut-off, so that the voltage of voltage regulation returns to preset value.
3. stable-pressure device according to claim 2, it is characterised in that the protection module includes：Power resistor, the work(
The input of rate resistance as the protection module input, the input of the power resistor is defeated with the Voltage stabilizing module
Go out end coupling, the output end of the power resistor as the protection module output end, the output end of the power resistor with
The external loading coupling.
4. stable-pressure device according to claim 2, it is characterised in that the first switch circuit includes：First resistor,
Two resistance, 3rd resistor and the first triode, one end of the first resistor control as the first of the first switch circuit
End, the colelctor electrode of first triode as the first switch circuit the second control end, the 3rd resistor it is another
Hold as the 3rd control end of the first switch circuit, the output end coupling of one end of the first resistor and the protection module
Close, the other end of the first resistor is coupled with one end of the second resistance and the base stage of first triode respectively, institute
The other end and the emitter stage of first triode for stating second resistance are grounded, the colelctor electrode of first triode respectively with
One end coupling of the input of the protection module and the 3rd resistor, the other end of the 3rd resistor is opened with described second
The first control end coupling on powered-down road.
5. stable-pressure device according to claim 4, it is characterised in that the first switch circuit also includes：4th resistance
With the second electric capacity, the other end of the 4th resistance as the first switch circuit the second control end, the 4th resistance
One end and first triode colelctor electrode coupling, the other end of the 4th resistance and the input of the protection module
The base stage coupling of coupling, one end of second electric capacity and first triode, the other end ground connection of second electric capacity.
6. stable-pressure device according to claim 2, it is characterised in that the second switch circuit includes：Second triode
With the 5th resistance, the base stage of second triode as the second switch circuit the first control end, the two or three pole
The colelctor electrode of pipe as the second switch circuit the second control end, the other end of the 5th resistance opens as described second
3rd control end on powered-down road, the base stage of second triode is coupled with the 3rd control end of the first switch circuit, institute
The colelctor electrode for stating the second triode is coupled with the output end of the Voltage stabilizing module, the emitter stage of second triode and described
One end of five resistance is grounded, the other end of the 5th resistance colelctor electrode respectively with second triode and the voltage stabilizing
The adjustable side coupling of module.
7. stable-pressure device according to claim 6, it is characterised in that the 5th resistance is adjustable resistance.
8. stable-pressure device according to claim 6, it is characterised in that the second switch circuit also includes：6th resistance,
3rd electric capacity and the 4th electric capacity, the other end of the 6th resistance as the second switch circuit the second control end, it is described
The colelctor electrode coupling of one end of the 6th resistance and second triode, the other end and the Voltage stabilizing module of the 6th resistance
Output end coupling, the base stage coupling of one end of the 3rd electric capacity and second triode, the 3rd electric capacity it is another
The emitter stage of end and second triode is coupled, and the other end of the 3rd electric capacity and the other end of the 4th electric capacity connect
Ground.
9. a kind of guard method, it is characterised in that be applied to the stable-pressure device as described in claim any one of 1-8, the side
Method includes：
During the external loading short circuit, the protection module bears the voltage of now Voltage stabilizing module output, to protect the voltage stabilizing
Module；
During the external loading short circuit, the VRM Voltage Regulator Module adjusts the voltage of the Voltage stabilizing module output end, so that input
The power of the protection module is not more than the rated power of the protection module.
10. a kind of communication bus supply unit, it is characterised in that the communication bus supply unit includes：COM1 and such as
Stable-pressure device described in claim any one of 1-8, the power end coupling of the output end of the stable-pressure device and the COM1
Close.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611250969.XA CN106774589B (en) | 2016-12-29 | 2016-12-29 | Stable-pressure device and guard method, communication bus power supply device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611250969.XA CN106774589B (en) | 2016-12-29 | 2016-12-29 | Stable-pressure device and guard method, communication bus power supply device |
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| CN106774589A true CN106774589A (en) | 2017-05-31 |
| CN106774589B CN106774589B (en) | 2019-06-11 |
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| CN115085336A (en) * | 2022-07-22 | 2022-09-20 | 深圳市创芯微微电子有限公司 | Dynamic load circuit for charging equipment, dynamic load adjusting method and charging equipment |
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| Publication number | Publication date |
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| CN106774589B (en) | 2019-06-11 |
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Denomination of invention: Voltage stabilizing device and protection method, communication bus power supply device Granted publication date: 20190611 Pledgee: China Postal Savings Bank Co.,Ltd. Wuhan Branch Pledgor: WUHAN SAN FRAN ELECTRONICS Corp. Registration number: Y2024980022633 |