CN205647253U - Anti thunderbolt can super wide voltage input current -limiting constant voltage power supply - Google Patents
Anti thunderbolt can super wide voltage input current -limiting constant voltage power supply Download PDFInfo
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- CN205647253U CN205647253U CN201620358588.2U CN201620358588U CN205647253U CN 205647253 U CN205647253 U CN 205647253U CN 201620358588 U CN201620358588 U CN 201620358588U CN 205647253 U CN205647253 U CN 205647253U
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Abstract
The utility model discloses an anti thunderbolt can super wide voltage input current -limiting constant voltage power supply, including high -voltage pulse protection circuit, rectifier circuit, bleeder circuit and voltage stabilizing circuit, the high -voltage pulse protection circuit is parallelly connected with rectifier circuit, rectifier circuit and bleeder circuit establish ties, bleeder circuit and voltage stabilizing circuit are parallelly connected, wherein, the high -voltage pulse protection circuit is established ties by a plurality of thermistor and a plurality of piezo -resistor and is formed, through flow through thermistor's electric current of increase to increase thermistor's resistance improves constant voltage power supply's resistant high -voltage pulse ability, rectifier circuit is established ties by a plurality of diode and forms, bleeder circuit makes each high -pressure field effect transistor's grid, drain electrode and source electrode obtain even partial pressure by a plurality of high pressure field effect transistor and a plurality of resistors, voltage stabilizing circuit comprises with zener diode triode, second resistance, this triode and the 2nd resistors constant current source, and the steady voltage source is formed with zener diode to this constant current source.
Description
Technical field
This utility model relates to a kind of regulated power supply, and particularly relating to a kind of anti-lightning can super wide voltage input
Current-limiting voltage-stabilizing power source.
Background technology
Along with society burns the wind, electrical equipment grows with each passing day.But the aging and development of electrical power distribution facility
Delayed, and design the reasons such as bad and electricity shortage and cause the too low of terminal temperature difference voltage, and the end of a thread is used
Family then frequent voltage is higher.The strict high and new technology of voltage request and precision are particularly set by electrical equipment
Standby, just as not insuring.Unstable voltage can cause mortal injury or misoperation to equipment, impact
Produce, cause many-sided loss such as delay at date of delivery, quality instability.Simultaneously acceleration equipment aging,
Affect and even burn accessory service life, make owner face the puzzlement needed repairing or will update in a short time
Equipment, wastes resource；Even there is security incident in severe patient, causes immeasurable loss.Therefore,
Select stabilized power source can provide for equipment and stablize alternating current or unidirectional current, it is ensured that equipment properly functioning.
But, stable alternating current or galvanic regulated power supply only can be provided can not to meet institute in love
The equipment demand to voltage under shape.Such as, civil power ammeter or the power supply of other city's power utilization monitoring device circuit,
Without the test pencil of battery or survey ammeter etc..This kind of device uses owing to supplying measuring circuit from measured source power taking,
Therefore regulated power supply needs to adapt to super wide voltage input (such as: 12V～1000V), and requires tested
Source draw electric current the least (such as: European standard≤3mA), simultaneously require can resist thunderbolt.
But, it is low that existing regulated power supply mainly uses the mode of the Switching Power Supply of resistance-capacitance depressurization or complexity to obtain
Potential source, this mode all can not realize super wide voltage input, and input voltage range can not be adjusted flexibly,
The impact of more than 8000V pulse voltage can not be born simultaneously.
Therefore, working out one can impact by anti-high-voltage pulse, can input by super wide voltage, and can be as required
The input range of voltage it is adjusted flexibly to obtain current-limiting voltage-stabilizing power source and the flow-limiting voltage-stabilizing method thereof of low pressure, aobvious
Obtain the most urgent.
Utility model content
For above-mentioned deficiency, the purpose of this utility model is to provide a kind of anti-lightning to input by super wide voltage
Current-limiting voltage-stabilizing power source, with solve existing regulated power supply cannot be carried out super wide voltage input, input voltage model
Enclose the problem that can not be adjusted flexibly and can not bear high-voltage pulse impact.
This utility model be the technical scheme is that by reaching above-mentioned purpose
A kind of anti-lightning can super wide voltage input current-limiting voltage-stabilizing power source, including high-voltage impulse protection circuit,
Rectification circuit, bleeder circuit and mu balanced circuit, described high-voltage impulse protection circuit is in parallel with rectification circuit,
Described rectification circuit is connected with bleeder circuit, and described bleeder circuit is in parallel with mu balanced circuit, wherein, described
High-voltage impulse protection circuit is in series with several varistors by several critesistor, by increasing
Flow through the electric current of critesistor, to increase the resistance of critesistor, improve the high pressure resistant pulse of regulated power supply
Ability；Described rectification circuit is formed by several Diode series；Described bleeder circuit is by several high pressure
Field effect transistor forms with several first resistance, makes grid, drain electrode and the source electrode of each high pressure field effect transistor
Obtain uniform dividing potential drop；Described mu balanced circuit is made up of with Zener diode audion, the second resistance, and these are three years old
Pole pipe and the second resistance composition constant-current source, this constant-current source forms source of stable pressure with Zener diode.
As further improvement of the utility model, also include current foldback circuit and current monitoring circuit.
As further improvement of the utility model, described high-voltage impulse protection circuit is by two critesistor
Being in series with a varistor, described rectification circuit is formed by eight Diode series, described dividing potential drop
Circuit is made up of with six the first resistance three high pressure field effect transistor；Described high-voltage impulse protection circuit includes
Critesistor PTC1, critesistor PTC2 and varistor CNR2, described rectification circuit includes two poles
Pipe D1, diode D2, diode D3, diode D4, diode D5, diode D6, two poles
Pipe D7 and diode D8, described bleeder circuit include high pressure field effect transistor Q1, high pressure field effect transistor Q2,
High pressure field effect transistor Q3, the first resistance R1, the first resistance R2, the first resistance R3, the first resistance R4,
First resistance R5 and the first resistance R6, described mu balanced circuit include audion Q4, the second resistance R7 with
Zener diode ZD1, wherein, described critesistor PTC1 connects with critesistor PTC2, then divides
It is not connected to varistor CNR2 one end, diode D1 negative pole and diode D8 positive pole, this pressure-sensitive electricity
The resistance CNR2 other end is respectively connecting to diode D2 negative pole and diode D6 positive pole；Described diode
D1 positive pole is connected to diode D4 negative pole, and this diode D4 positive pole is just being respectively connecting to diode D5
Pole is connected to diode D2 positive pole with ground end, this diode D5 negative pole, and described diode D8 negative pole is even
Being connected to diode D7 positive pole, this diode D7 negative pole is respectively connecting to diode D3 negative pole, the first electricity
Resistance R1 one end and the drain electrode of high pressure field effect transistor Q1, this diode D3 positive pole is connected to diode D6
Negative pole；The described first resistance R1 other end and first resistance R2 one end connect, and R2 is another for this first resistance
One end is respectively connecting to grid and first resistance R3 one end, this first resistance of high pressure field effect transistor Q1
The R3 other end is connected to first resistance R4 one end, and this first resistance R4 other end is respectively connecting to high pressure
The grid of field effect transistor Q2 and first resistance R5 one end, this first resistance R5 other end is connected to first
Resistance R6 one end, this first resistance R6 other end be respectively connecting to high pressure field effect transistor Q3 grid,
The colelctor electrode of audion Q4 and one second electric capacity C1 positive pole, this second electric capacity C1 minus earth end, should
The source electrode of high pressure field effect transistor Q1 is connected with the drain electrode of high pressure field effect transistor Q2, this high pressure field effect transistor
The source electrode of Q2 is connected with the drain electrode of high pressure field effect transistor Q3, and the source electrode of this high pressure field effect transistor Q3 is respectively
It is connected to base stage and second resistance R7 one end of audion Q4；The emitting stage of this audion Q4 connects respectively
It is connected to the second resistance R7 other end, Zener diode ZD1 negative pole and one the 3rd electric capacity C2 positive pole, should
Zener diode ZD1 positive pole is respectively connecting to the 3rd electric capacity C2 negative pole and ground end.
The beneficial effects of the utility model are: protect by increasing high-voltage pulse at the input of regulated power supply
Circuit, protects the circuit of whole regulated power supply, makes regulated power supply to impact by anti-high-voltage pulse；Logical
Cross the rectification circuit of multiple Diode series composition, improve the voltage endurance capability of whole regulated power supply；By spirit
The high pressure field effect transistor of concatenation of living coordinates Zener diode, it is achieved super wide voltage input turns the mesh of voltage stabilizing output
's；Use the PN junction regulation of audion, it is achieved current limliting exports；By the appropriate design to whole circuit,
Realize anti-high-voltage pulse (thunderbolt) impact, can input by super wide voltage, and electricity can be adjusted flexibly as required
The input range of pressure, to obtain the effect of the flow-limiting voltage-stabilizing of low pressure.
Above-mentioned is the general introduction of utility model technical scheme, below in conjunction with accompanying drawing and detailed description of the invention, to this
Utility model is described further.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of this utility model voltage-stabilized power supply circuit；
Fig. 2 is the circuit diagram of this utility model regulated power supply；
Fig. 3 is the circuit diagram of this utility model current foldback circuit；
Fig. 4 is the circuit diagram of this utility model current monitoring circuit.
Detailed description of the invention
By further illustrating the technological means and effect that this utility model taked by reaching predetermined purpose,
Below in conjunction with accompanying drawing and preferred embodiment, detailed description of the invention of the present utility model is described in detail.
Embodiment one:
Refer to Fig. 1 and Fig. 2, the anti-lightning that the present embodiment provides can the flow-limiting voltage-stabilizing of super wide voltage input
Power supply, it includes high-voltage impulse protection circuit, rectification circuit, bleeder circuit and mu balanced circuit, described height
Pressure pulse protection circuit is in parallel with rectification circuit, and described rectification circuit is connected with bleeder circuit, described dividing potential drop
Circuit is in parallel with mu balanced circuit, wherein, if described high-voltage impulse protection circuit by several critesistor with
A dry varistor is in series, and is flowed through the electric current of critesistor by increase, to increase critesistor
Resistance, improves the high pressure resistant pulse ability of regulated power supply；Described rectification circuit is by several Diode series
Form；Described bleeder circuit is made up of with several first resistance several high pressure field effect transistor, makes each
The grid of high pressure field effect transistor, drain electrode obtain uniform dividing potential drop with source electrode；Described mu balanced circuit by audion,
Second resistance and Zener diode form, and this audion and the second resistance form constant-current source, this constant-current source and
Zener diode composition source of stable pressure.
In the present embodiment, described high-voltage impulse protection circuit is by two critesistor and a varistor
Being in series, described rectification circuit is formed by eight Diode series, and described bleeder circuit is by three high pressure
Field effect transistor and six the first resistance compositions.
In described high-voltage impulse protection circuit, by the way of the series connection of two critesistor, make whole surely
Voltage source can bear higher high-voltage pulse, when input voltage is higher than the conducting voltage of varistor,
This varistor turns on, and the loop current of two critesistor increases, thus increases its resistance, thus right
Rectification circuit, bleeder circuit are protected with mu balanced circuit.In described rectification circuit, eight diodes
Series connection play the effect of rectification, make whole regulated power supply have higher voltage endurance capability simultaneously.Described
In bleeder circuit, using three high pressure field effect transistor series connection dividing potential drops, the value of six the first resistance is identical to be made
Obtain the uniform dividing potential drop of grid of three high pressure field effect transistor, so that the drain electrode of three high pressure field effect transistor and source
Pole also uniform dividing potential drop, simultaneously as the use of high pressure field effect transistor so that six the first resistance can be chosen
Bigger resistance, and taken into account higher and relatively low input voltage.In described mu balanced circuit, three poles
Pipe and the second resistance composition constant-current source, and its electric current I=0.6/ (resistance value of the second resistance), this constant-current source with
Zener diode composition source of stable pressure, when the electric current flowing through the second resistance increases, triode ON degree increases
By force, then drag down the grid voltage of three high-voltage field effects, three high-voltage field effect conducting degree reduce and
Dividing potential drop increases, thus realizes the purpose of flow-limiting voltage-stabilizing.
As in figure 2 it is shown, as a kind of specific embodiment, described high-voltage impulse protection circuit includes heat
Quick resistance PTC1, critesistor PTC2 and varistor CNR2, described rectification circuit includes diode
D1, diode D2, diode D3, diode D4, diode D5, diode D6, diode
D7 and diode D8, described bleeder circuit include high pressure field effect transistor Q1, high pressure field effect transistor Q2,
High pressure field effect transistor Q3, the first resistance R1, the first resistance R2, the first resistance R3, the first resistance R4,
First resistance R5 and the first resistance R6, described mu balanced circuit include audion Q4, the second resistance R7 with
Zener diode ZD1, wherein, described critesistor PTC1 connects with critesistor PTC2, then divides
It is not connected to varistor CNR2 one end, diode D1 negative pole and diode D8 positive pole, this pressure-sensitive electricity
The resistance CNR2 other end is respectively connecting to diode D2 negative pole and diode D6 positive pole；Described diode
D1 positive pole is connected to diode D4 negative pole, and this diode D4 positive pole is just being respectively connecting to diode D5
Pole is connected to diode D2 positive pole with ground end, this diode D5 negative pole, and described diode D8 negative pole is even
Being connected to diode D7 positive pole, this diode D7 negative pole is respectively connecting to diode D3 negative pole, the first electricity
Resistance R1 one end and the drain electrode of high pressure field effect transistor Q1, this diode D3 positive pole is connected to diode D6
Negative pole；The described first resistance R1 other end and first resistance R2 one end connect, and R2 is another for this first resistance
One end is respectively connecting to grid and first resistance R3 one end, this first resistance of high pressure field effect transistor Q1
The R3 other end is connected to first resistance R4 one end, and this first resistance R4 other end is respectively connecting to high pressure
The grid of field effect transistor Q2 and first resistance R5 one end, this first resistance R5 other end is connected to first
Resistance R6 one end, this first resistance R6 other end be respectively connecting to high pressure field effect transistor Q3 grid,
The colelctor electrode of audion Q4 and one second electric capacity C1 positive pole, this second electric capacity C1 minus earth end, should
The source electrode of high pressure field effect transistor Q1 is connected with the drain electrode of high pressure field effect transistor Q2, this high pressure field effect transistor
The source electrode of Q2 is connected with the drain electrode of high pressure field effect transistor Q3, and the source electrode of this high pressure field effect transistor Q3 is respectively
It is connected to base stage and second resistance R7 one end of audion Q4；The emitting stage of this audion Q4 connects respectively
It is connected to the second resistance R7 other end, Zener diode ZD1 negative pole and one the 3rd electric capacity C2 positive pole, should
Zener diode ZD1 positive pole is respectively connecting to the 3rd electric capacity C2 negative pole and ground end.
Meanwhile, in the present embodiment, the input of current-limiting voltage-stabilizing power source can input 12-1000V DC/AC electricity
Pressure, its outfan may be connected directly to measure or other devices.Certainly, can protect by changing high-voltage pulse
The series connection progression of protection circuit and parameter, bear the size of pulse voltage changing regulated power supply；According to input
The needs of voltage range, the progression that high pressure field effect transistor can be increased or decreased flexibly achieves the goal；Meanwhile,
The numerical value of current limliting and voltage stabilizing can be changed by the parameter adjusting the second resistance and Zener diode.
This enforcement additionally provides a kind of anti-lightning can the flow-limiting voltage-stabilizing of current-limiting voltage-stabilizing power source of super wide voltage input
Method, comprises the following steps:
(1) regulated power supply is set, this regulated power supply include high-voltage impulse protection circuit, rectification circuit,
Bleeder circuit and mu balanced circuit, wherein, if described high-voltage impulse protection circuit by several critesistor with
A dry varistor is in series；Described rectification circuit is formed by several Diode series；Described dividing potential drop
Circuit is made up of with several first resistance several high pressure field effect transistor；Described mu balanced circuit by audion,
Second resistance forms with Zener diode；
(2) conducting voltage of varistor in preset high-pressure pulse protection circuit, when high-voltage pulse protection electricity
When the input terminal voltage on road is higher than the conducting voltage of varistor, varistor turns on, and flows through critesistor
Electric current increase, thus increase the resistance of critesistor, then whole voltage-stabilized power supply circuit protected；
(3) several diode pair high-voltage impulse protection circuit outfans of series connection in described rectification circuit
Electric current carries out rectification, and alternating current is converted to unidirectional current；
(4) several high pressure field effect transistor in described bleeder circuit are connected in series, simultaneously by several
First resistant series forms series arm, and the grid of each high pressure field effect transistor is connected to series arm
In, the voltage of rectification circuit output end is carried out dividing potential drop, the grid making each high pressure field effect transistor is the most electric
Pressure, and the drain electrode of each high pressure field effect transistor and source electrode even voltage；
(5) audion in described mu balanced circuit and the second resistance composition constant-current source, will flow through mu balanced circuit
Electric current dynamically regulate, make constant current hold, this constant-current source and Zener diode form source of stable pressure,
When the electric current flowing through the second resistance increases, the conducting degree of audion strengthens, then drags down each high pressure
The grid voltage of field effect transistor, so that the conducting degree of each high pressure field effect transistor reduces and dividing potential drop increase,
Reach the purpose of flow-limiting voltage-stabilizing.
In the present embodiment, in described step (1), the resistance of several the first resistance described is the most identical；
In described step (5), the electric current I=0.6/ (the of the constant-current source of described audion and the second resistance composition
The resistance value of two resistance).
Embodiment two:
Refer to Fig. 3, the present embodiment differs primarily in that with enforcement one, further comprises the steps of: (6) and exist
Gate series one current foldback circuit of each high pressure field effect transistor, when outer load charging current is excessive,
Voltage is added to the grid of high pressure field effect transistor by current foldback circuit after postponing a period of time, to avoid dividing potential drop
Circuit produces parasitic pressure drop.Current foldback circuit in described step (6) is by the 3rd resistance R8 and
The delay circuit of one electric capacity C composition.Described regulated power supply also includes current foldback circuit.
High pressure field effect transistor in this utility model plays important weight to the function of whole regulated power supply
, therefore, the long-term of high pressure field effect transistor keeps its original performance most important, but, in reality
In application, damage owing to overload can cause high pressure field effect transistor PN junction temperature too high, owing to voltage surpasses
Go out the limiting voltage of the actual permission of high pressure field effect transistor and cause PN junction to puncture damage, accordingly, it would be desirable to right
High pressure field effect transistor takes protective measure.The present embodiment is increased by the grid in each high pressure field effect transistor
One delay circuit, to avoid external load moment that switches on power to make electricity owing to being loaded with bigger charging current
Parasitic pressure drop produced by source circuit, and cause high pressure field effect transistor puncture damage.To high-voltage field effect
Pipe plays a very good protection, it is ensured that the high-voltage field effect pipe range phase keeps its original performance.
Embodiment three:
Refer to Fig. 4, the present embodiment differs primarily in that with enforcement one, further comprising the steps of: (7)
Outfan at mu balanced circuit is connected a current monitoring circuit, and this current monitoring circuit is by the 4th resistance R9
Composing in parallel with current parallel monitor chip, this current parallel monitor chip will flow through the 4th resistance R9
The voltage drop produced changes into electric current, and converts the current to voltage signal.Described regulated power supply also includes
Current monitoring circuit.
Described step (7) specifically includes following steps:
(7.1) internal circuit at current parallel monitor chip arranges operational amplifier L, NPN crystal
Pipe Q5, the 5th resistance R10, the 6th resistance R11 and audion Q6, wherein, this operational amplifier L
In-phase input end be connected to the 5th resistance R10 one end, reverse input end is connected to the 6th resistance R11 mono-
End, outfan is connected with the base stage of NPN transistor Q5, and the colelctor electrode of this NPN transistor Q5 connects
To the other end of the 5th resistance R10, the emitter stage of this NPN transistor Q5 connects an outer meeting resistance RL；
(7.2) when described circuit output end of pressure-stabilizing electric current flows through the 4th resistance R9, a voltage drop is produced,
When on the 5th resistance R10 that voltage drop is applied to current parallel monitor chip internal, this current parallel
The internal circuit of monitor chip enters the colelctor electrode of NPN transistor Q5, external electricity by producing an electric current
Resistance RLOutput electric current is changed into voltage signal.
Other steps are identical with embodiment one, do not repeat them here.
Along with improving constantly of chip integration and wiring density, the regulated power supply for electronic product can produce
The faults such as raw open circuit, short circuit, electric leakage, therefore before applying this regulated power supply, need regulated power supply electricity
The outfan on road carries out the detection of power supply, to guarantee that whole power circuit normally works.The present embodiment is surely
The outfan of volt circuit is connected a current monitoring circuit, in order to reduce the measurement of voltage-stabilized power supply circuit outfan
The circuit impact on tested electric current, the present embodiment uses current parallel monitor chip by measuring circuit (the
Four resistance) export as electric current, then convert the current to voltage signal by outer meeting resistance, right to realize
The monitoring of voltage-stabilized power supply circuit output end current.
Emphasis of the present utility model essentially consists in, and protects by increasing high-voltage pulse at the input of regulated power supply
Protection circuit, protects the circuit of whole regulated power supply, makes regulated power supply to impact by anti-high-voltage pulse；
The rectification circuit consisted of multiple Diode series, improves the voltage endurance capability of whole regulated power supply；Pass through
The high pressure field effect transistor of concatenation coordinates Zener diode flexibly, it is achieved super wide voltage input turns voltage stabilizing output
Purpose；Use the PN junction regulation of audion, it is achieved current limliting exports；By the appropriate design of whole circuit,
Realize anti-high-voltage pulse (thunderbolt) impact, can input by super wide voltage, and electricity can be adjusted flexibly as required
The input range of pressure, to obtain the effect of the flow-limiting voltage-stabilizing of low pressure.
The above, be only preferred embodiment of the present utility model, not to skill of the present utility model
Art scope imposes any restrictions, therefore uses or the technical characteristic of approximation identical with this utility model above-described embodiment,
All within protection domain of the present utility model.
Claims (4)
1. an anti-lightning can the current-limiting voltage-stabilizing power source of super wide voltage input, it is characterised in that include high pressure
Pulse protection circuit, rectification circuit, bleeder circuit and mu balanced circuit, described high-voltage impulse protection circuit with
Rectification circuit is in parallel, and described rectification circuit is connected with bleeder circuit, and described bleeder circuit is with mu balanced circuit also
Connection；
Wherein, described high-voltage impulse protection circuit is connected with several varistors by several critesistor
Form；Described rectification circuit is formed by several Diode series；Described bleeder circuit is by several high pressure
Field effect transistor forms with several first resistance；Described mu balanced circuit is by audion, the second resistance and voltage stabilizing
Diode forms, and this audion and the second resistance composition constant-current source, this constant-current source forms with Zener diode
Source of stable pressure.
Anti-lightning the most according to claim 1 can the current-limiting voltage-stabilizing power source of super wide voltage input, it is special
Levying and be, it also includes current foldback circuit and current monitoring circuit.
Anti-lightning the most according to claim 1 can the current-limiting voltage-stabilizing power source of super wide voltage input, it is special
Levying and be, described high-voltage impulse protection circuit is in series by two critesistor and a varistor,
Described rectification circuit is formed by eight Diode series, described bleeder circuit by three high pressure field effect transistor with
Six the first resistance compositions.
Anti-lightning the most according to claim 3 can the current-limiting voltage-stabilizing power source of super wide voltage input, it is special
Levying and be, described high-voltage impulse protection circuit includes that critesistor PTC1, critesistor PTC2 are with pressure-sensitive
Resistance CNR2, described rectification circuit includes diode D1, diode D2, diode D3, diode
D4, diode D5, diode D6, diode D7 and diode D8, described bleeder circuit includes height
Pressure field effect transistor Q1, high pressure field effect transistor Q2, high pressure field effect transistor Q3, the first resistance R1, first
Resistance R2, the first resistance R3, the first resistance R4, the first resistance R5 and the first resistance R6, described surely
Volt circuit includes audion Q4, the second resistance R7 and Zener diode ZD1, wherein, described temperature-sensitive electricity
Resistance PTC1 connects with critesistor PTC2, then is respectively connecting to varistor CNR2 one end, two poles
Pipe D1 negative pole and diode D8 positive pole, this varistor CNR2 other end is respectively connecting to diode
D2 negative pole and diode D6 positive pole；Described diode D1 positive pole is connected to diode D4 negative pole, should
Diode D4 positive pole is respectively connecting to diode D5 positive pole and ground end, and this diode D5 negative pole is connected to
Diode D2 positive pole, described diode D8 negative pole is connected to diode D7 positive pole, this diode D7
Negative pole is respectively connecting to the leakage of diode D3 negative pole, first resistance R1 one end and high pressure field effect transistor Q1
Pole, this diode D3 positive pole is connected to diode D6 negative pole；The described first resistance R1 other end and
One resistance R2 one end connects, and this first resistance R2 other end is respectively connecting to high pressure field effect transistor Q1
Grid and first resistance R3 one end, this first resistance R3 other end is connected to first resistance R4 one end,
This first resistance R4 other end is respectively connecting to grid and the first resistance R5 mono-of high pressure field effect transistor Q2
End, this first resistance R5 other end is connected to first resistance R6 one end, this first resistance R6 other end
It is respectively connecting to the grid of high pressure field effect transistor Q3, the colelctor electrode of audion Q4 and one second electric capacity C1
Positive pole, this second electric capacity C1 minus earth end, the source electrode of this high pressure field effect transistor Q1 and high-voltage field effect
The drain electrode of pipe Q2 connects, and the source electrode of this high pressure field effect transistor Q2 connects with the drain electrode of high pressure field effect transistor Q3
Connecing, the source electrode of this high pressure field effect transistor Q3 is respectively connecting to base stage and the second resistance R7 of audion Q4
One end；The emitting stage of this audion Q4 is respectively connecting to the second resistance R7 other end, Zener diode
ZD1 negative pole and one the 3rd electric capacity C2 positive pole, this Zener diode ZD1 positive pole is respectively connecting to the 3rd electricity
Hold C2 negative pole and ground end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620358588.2U CN205647253U (en) | 2016-04-25 | 2016-04-25 | Anti thunderbolt can super wide voltage input current -limiting constant voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620358588.2U CN205647253U (en) | 2016-04-25 | 2016-04-25 | Anti thunderbolt can super wide voltage input current -limiting constant voltage power supply |
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| Publication Number | Publication Date |
|---|---|
| CN205647253U true CN205647253U (en) | 2016-10-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112506255A (en) * | 2020-12-02 | 2021-03-16 | 天津同阳科技发展有限公司 | Automatic heating circuit of air chamber for gas monitoring equipment |
-
2016
- 2016-04-25 CN CN201620358588.2U patent/CN205647253U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112506255A (en) * | 2020-12-02 | 2021-03-16 | 天津同阳科技发展有限公司 | Automatic heating circuit of air chamber for gas monitoring equipment |
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