CN106998150A - A kind of constant-current source and implementation method suppressed based on transient state with soft start - Google Patents
A kind of constant-current source and implementation method suppressed based on transient state with soft start Download PDFInfo
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- CN106998150A CN106998150A CN201710244702.8A CN201710244702A CN106998150A CN 106998150 A CN106998150 A CN 106998150A CN 201710244702 A CN201710244702 A CN 201710244702A CN 106998150 A CN106998150 A CN 106998150A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/062—Avoiding or suppressing excessive transient voltages or currents
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a kind of constant-current source and implementation method suppressed based on transient state with soft start, when power on or power-off, soft start circuit module control completes soft start, so that diode gradually lights, transient state suppression circuit module provides bleed off circuit simultaneously, so that whole circuit normal work when moment starts or powered off, the electric current that constant-current circuit module then keeps flow through Constant Current Load is invariable.A kind of constant-current source and implementation method based on transient state suppression and soft start of the present invention is compared with prior art, the transient wave of Constant Current Load can be suppressed, accomplish gentle startup, stable constant current output, meets the use demand of user, and based on different demands, different solutions can be provided, it is practical, it is applied widely, with good application value.
Description
Technical field
The present invention relates to technical field of electronic products, specifically a kind of constant-current source suppressed based on transient state with soft start
And implementation method.
Background technology
In current many electronic product especially light fixture, video equipment, battery charging equipments, stable constant-current source is to closing weight
Will, be related to equipment whether can normal work, the use feeling of user can be better met.Based on this, the present invention is directed to
In this demand, it is proposed that a kind of simple achievable design method, and according to different demands, different solution party are formulated
Case.
The content of the invention
The technical assignment of the present invention is that there is provided a kind of constant current suppressed based on transient state with soft start for above weak point
Source and implementation method.
A kind of constant-current source suppressed based on transient state with soft start, its circuit includes diode D1, diode D2, diode
D3, diode D4, diode D5, wherein diode D1 positive pole are connected and constituted the one of constant-current source with diode D3 negative pole
End, the end is connected with protective resistance R0；Diode D2 positive pole is connected with diode D4 negative pole and constitutes the another of constant-current source
End, diode D1 negative pole converges into a path and is connected to diode D5 positive pole, the diode with diode D2 negative pole
D5 negative pole access constant-current circuit module, soft start circuit module and transient state suppression circuit module, the soft start circuit module
For the whole circuit soft start when switching on power, transient circuit suppression module is by providing leadage circuit so that moment starts
Or whole circuit normal work during power-off, the electric current that constant-current circuit module then keeps flow through Constant Current Load is invariable；Last wink
The output end of state suppression circuit module is connected to diode D3, diode D4 positive pole, so as to form closed-loop path.
The constant-current circuit module includes triode Q1, resistance R3, sampling resistor R4, voltage-regulator diode IC1, wherein above-mentioned
Diode D5 negative pole is divided into three branch roads, and one is grounded through electric capacity C2；One is connected to triode Q1 c after loading RL
Pole, triode Q1 e poles connect sampling resistor R4 and voltage-regulator diode IC1 input, sampling resistor R4 output end
Connect voltage-regulator diode IC1 input；B pole of the Article 3 after resistance R3 with triode Q1, voltage-regulator diode IC1 it is defeated
Go out end to converge into a path and be connected to soft start circuit module；In addition, being provided with electricity between triode Q1 c poles and e poles
Hold C5, electric capacity C4 is provided between e poles and b poles, to absorb transient voltage surges.
The soft start circuit module includes triode Q2, electric capacity C3, and wherein triode Q2 e poles connection is above-mentioned by electricity
The path converged into after resistance R3 with triode Q1 b poles, voltage-regulator diode IC1 output end, triode Q2 c poles are connected to sampling
Between resistance R4 output end and voltage-regulator diode IC1 input, electric capacity is provided between the triode Q2 b poles and c poles
C3, and triode Q2 b poles are all connected to transient state suppression circuit module with c poles.
The transient state suppression circuit module includes resistance R1, resistance R2, triode Q3, and wherein resistance R1 input is connected
The path output that diode D1 negative pole is converged into diode D2 negative pole, resistance R1 output end and triode Q3 b
The input that a path is connected to resistance R2 is converged into pole, and the e poles of the triode Q3 are connected to triode Q2 b poles and electric capacity
C3 negative pole, triode Q3 c poles are connected to sampling resistor R4 output end, sampling resistor R4 output end also with resistance R2
Output end converge into a path and be connected to diode D3, diode D4 positive pole.
The triode Q1 is NPN type triode, and triode Q2, triode Q3 are PNP type triode.
Described electric capacity C1, C2, C5 select pressure-resistant more than 400V electric capacity, and electric capacity C3 selects electrodeless electric capacity, pressure-resistant 16v with
On, all resistance use 1w resistance, and sampling resistor R4 resistance between the Ω of 125 Ω~140.
A kind of constant-current source implementation method suppressed based on transient state with soft start, based on foregoing circuit, its implementation process is：When
When power on or power-off, soft start circuit module control completes soft start so that diode gradually lights, while transient state suppresses
Circuit module provides bleed off circuit so that whole circuit normal work when moment starts or powered off, constant-current circuit module is then kept
The electric current for flowing through Constant Current Load is invariable.
In power on, electric capacity C3 is equivalent to short circuit, and power supply is through resistance R3, triode Q2 b poles and e poles, electric capacity C3
To ground, at this moment triode Q2 saturation conductions, triode Q1 ends because of no base current, and LED does not light；Through after a while
Charging after, electric capacity C3 both end voltages are slowly raised, and triode Q2 base currents are gradually reduced until cut-off, at this moment triode Q1
It is gradually turned on, LED slowly lights, completes soft start-up process.
In the transient state suppression circuit module, when the power is turned on, load RL two ends absorb impact jointly with electric capacity C5；When
Sent a telegram here at once not only or just after power remove but also when opening at once after having a power failure suddenly during circuit normal work, due to electric capacity C3 two
Terminal voltage can not be mutated, soft starting circuit failure, at this moment provided bleed off path for electric capacity C3 by transient state suppression circuit module, made
Triode Q3 also can saturation conduction, the voltage bleed off on electric capacity C3 is fallen, so as to ensure the normal work of circuit.
When LED electric current increase or reduction, the voltage drop at sampling resistor R4 two ends is also and then raised and lowered, voltage stabilizing two
Pole pipe IC1 input terminal voltage also changes therewith, so as to control the current potential of triode Q1 base stages, keeps flow through the electricity of Constant Current Load
Stream is invariable.
Compared to the prior art a kind of constant-current source and implementation method based on transient state suppression and soft start of the present invention, have
Following beneficial effect：
A kind of constant-current source and implementation method suppressed based on transient state with soft start of the present invention, can suppress the transient state of Constant Current Load
Fluctuation, accomplishes gentle startup, and stable constant current output meets the use demand of user, and based on different demands, it is possible to provide it is different
Solution, it is practical, it is applied widely, with good application value.
Brief description of the drawings
Accompanying drawing 1 realizes circuit diagram for the present invention's.
Accompanying drawing 2 is the expanded circuit figure of another embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described.
In current many electronic product especially light fixture, video equipment, battery charging equipments, stable constant-current source is to closing weight
Will, be related to equipment whether can normal work, the use feeling of user can be better met.The design is directed to this need
Ask, it is proposed that a kind of simple achievable design, and according to different demands, formulated different solutions.
As shown in Figure 1, a kind of constant-current source suppressed based on transient state with soft start, its circuit includes diode D1, two poles
Pipe D2, diode D3, diode D4, diode D5, wherein diode D1 positive pole are connected and constituted with diode D3 negative pole
One end of constant-current source, the end is connected with protective resistance R0；Diode D2 positive pole is connected with diode D4 negative pole and constitutes perseverance
The other end in stream source, diode D1 negative pole converges into a path and is connected to diode D5 just with diode D2 negative pole
Pole, the diode D5 negative pole access constant-current circuit module, soft start circuit module and transient state suppression circuit module are described soft to open
Dynamic circuit module is used for the whole circuit soft start when switching on power, and transient circuit suppression module is made by providing leadage circuit
Whole circuit normal work when obtaining moment startup or powering off, the electric current that constant-current circuit module then keeps flow through Constant Current Load is constant not
Become；The output end of last transient state suppression circuit module is connected to diode D3, diode D4 positive pole, is closed back so as to be formed
Road.
The constant-current circuit module includes triode Q1, resistance R3, sampling resistor R4, voltage-regulator diode IC1, wherein above-mentioned
Diode D5 negative pole is divided into three branch roads, and one is grounded through electric capacity C2；One is connected to triode Q1 c after loading RL
Pole, triode Q1 e poles connect sampling resistor R4 and voltage-regulator diode IC1 input, sampling resistor R4 output end
Connect voltage-regulator diode IC1 input；B pole of the Article 3 after resistance R3 with triode Q1, voltage-regulator diode IC1 it is defeated
Go out end to converge into a path and be connected to soft start circuit module；In addition, being provided with electricity between triode Q1 c poles and e poles
Hold C5, electric capacity C4 is provided between e poles and b poles, to absorb transient voltage surges.
The soft start circuit module includes triode Q2, electric capacity C3, and wherein triode Q2 e poles connection is above-mentioned by electricity
The path converged into after resistance R3 with triode Q1 b poles, voltage-regulator diode IC1 output end, triode Q2 c poles are connected to sampling
Between resistance R4 output end and voltage-regulator diode IC1 input, electric capacity is provided between the triode Q2 b poles and c poles
C3, and triode Q2 b poles are all connected to transient state suppression circuit module with c poles.
The transient state suppression circuit module includes resistance R1, resistance R2, triode Q3, and wherein resistance R1 input is connected
The path output that diode D1 negative pole is converged into diode D2 negative pole, resistance R1 output end and triode Q3 b
The input that a path is connected to resistance R2 is converged into pole, and the e poles of the triode Q3 are connected to triode Q2 b poles and electric capacity
C3 negative pole, triode Q3 c poles are connected to sampling resistor R4 output end, sampling resistor R4 output end also with resistance R2
Output end converge into a path and be connected to diode D3, diode D4 positive pole.
The triode Q1 is NPN type triode, and triode Q2, triode Q3 are PNP type triode.
Described electric capacity C1, C2, C5 select pressure-resistant more than 400V electric capacity, and electric capacity C3 selects electrodeless electric capacity, pressure-resistant 16v with
On, all resistance use 1w resistance, and sampling resistor R4 resistance between the Ω of 125 Ω~140.
A kind of constant-current source implementation method suppressed based on transient state with soft start, based on foregoing circuit, its implementation process is：Work as power supply
When connecting or powering off, soft start circuit module control completes soft start so that diode gradually lights, while transient state suppression circuit
Module provides bleed off circuit so that whole circuit normal work when moment starts or powered off, constant-current circuit module is then kept flow through
The electric current of Constant Current Load is invariable.
In power on, electric capacity C3 is equivalent to short circuit, and power supply is through resistance R3, triode Q2 b poles and e poles, electric capacity C3
To ground, at this moment triode Q2 saturation conductions, A points are pulled to low potential, and triode Q1 ends because of no base current, and LED is not
It is luminous；After charging after a while, electric capacity C3 both end voltages are slowly raised, and triode Q2 base currents are gradually reduced until
Cut-off, the current potential of A points can be raised slowly, and at this moment triode Q1 is gradually turned on, and LED slowly lights, and complete soft start-up process.
In the transient state suppression circuit module, surge voltage is from two aspects, and one is when being just switched on power supply, even if there is soft open
Still there is moment impact in the presence of dynamic circuit, load two ends, this phenomenon can be obvious by observing load starting state discovery
Change.Load RL two ends absorb impact jointly with electric capacity C5；When circuit normal work suddenly have a power failure after again at once incoming call or
When just being opened after power remove again at once, because electric capacity C3 both end voltages can not be mutated, at this moment soft starting circuit failure passes through
Transient state suppression circuit module provides bleed off path for electric capacity C3, make triode Q3 also can saturation conduction, by the voltage on electric capacity C3
Bleed off falls, so as to ensure the normal work of circuit.
When causing the electric current increase or reduction of flowing through LED for some reason, the voltage drop at sampling resistor R4 two ends
And then it is raised and lowered, voltage-regulator diode IC1 input terminal voltage also changes therewith, so as to control the electricity of triode Q1 base stages
Position, the electric current for keeping flow through Constant Current Load is invariable.
Above-mentioned LED is the diode D1-D5 in circuit diagram.
Another embodiment：In addition, the circuit of the present invention is also designed to another structure to meet large load current
The demand of equipment, the constant-current source being made up of here two triodes can drive large load current equipment.Accompanying drawing 2 is with two
The constant-current source circuit of PNP transistors and four resistance composition, by can be with from High-power Semiconductor Triode and fin
Continuous current is set to reach more than 1A.
As shown in Figure 2, the negative pole of D1, D2 in circuit input end connection figure 1 in the Fig. 2 are exported its circuit structure
The positive pole of D3, D4 in connection figure 1 are held, in the accompanying drawing 2, transistor Q1 and resistance R1, R4, R2 composition main circuit, R2 and R4 go here and there
The upper offset resistance of transistor Tr1 base stages is constituted after connection.After power on, due to having in base stage in electric current flowing, Tr1
Just have collector current to flow through, emitter current flows through after R1 can produce voltage drop at R1 two ends.When the voltage drop at R1 two ends
When reaching 0.6V, Q2 can be turned on therewith, and Q2 collector current flows through the base stage that base current formation of the R2. to Q1 shunts .Tr1
Electric current can reduce therewith, and collector current also reduces therewith.Therefore limitation can be produced to Tr1 base current after Tr2 conductings
Effect, makes the outputting current steadily of circuit in some current value.The size of continuous current is determined by R1 resistance value and Q2 Vbe
Fixed, if Q2 Vbe is equal to 0.6V, the output current I of circuit can be calculated with I=Vbe/R1.
For transistor, Vbe temperature coefficient is about -1mV/ DEG C, and Vbe numerical value meeting variation with temperature goes out
Existing larger variation, so this circuit cannot be used for the exigent occasion of constant-current accuracy, therefore non-of the extension content
The optimal selection of patent.
By embodiment above, the those skilled in the art can readily realize the present invention.But should
Work as understanding, the present invention is not limited to above-mentioned embodiment.On the basis of disclosed embodiment, the technical field
Technical staff can be combined different technical characteristics, so as to realize different technical schemes.
It is the known technology of those skilled in the art in addition to the technical characteristic described in specification.
Claims (10)
1. a kind of constant-current source suppressed based on transient state with soft start, it is characterised in that its circuit includes diode D1, diode
D2, diode D3, diode D4, diode D5, wherein diode D1 positive pole are connected with diode D3 negative pole and constitute perseverance
The one end in stream source, the end is connected with protective resistance R0；Diode D2 positive pole is connected with diode D4 negative pole and constitutes constant current
The other end in source, diode D1 negative pole converges into a path and is connected to diode D5 positive pole with diode D2 negative pole,
Diode D5 negative pole access constant-current circuit module, soft start circuit module and transient state suppression circuit module, the soft start
Circuit module is used for the whole circuit soft start when switching on power, and transient circuit suppression module is by providing leadage circuit so that
Whole circuit normal work when moment starts or powered off, the electric current that constant-current circuit module then keeps flow through Constant Current Load is constant not
Become；The output end of last transient state suppression circuit module is connected to diode D3, diode D4 positive pole, is closed back so as to be formed
Road.
2. a kind of constant-current source suppressed based on transient state with soft start according to claim 1, it is characterised in that the constant current
Circuit module includes triode Q1, resistance R3, sampling resistor R4, voltage-regulator diode IC1, wherein above-mentioned diode D5 negative pole point
Into three branch roads, one is grounded through electric capacity C2；One is connected to triode Q1 c poles after loading RL, and triode Q1 e poles connect
Sampling resistor R4 and voltage-regulator diode IC1 input are connect, sampling resistor R4 output end also connects voltage-regulator diode IC1's
Input；B pole of the Article 3 after resistance R3 with triode Q1, voltage-regulator diode IC1 output end converge into a path simultaneously
It is connected to soft start circuit module；Set in addition, being provided between triode Q1 c poles and e poles between electric capacity C5, e pole and b poles
Electric capacity C4 is equipped with, to absorb transient voltage surges.
3. it is according to claim 2 it is a kind of suppressed based on transient state and soft start constant-current source, it is characterised in that it is described soft to open
Dynamic circuit module includes triode Q2, electric capacity C3, wherein triode Q2 e poles connection it is above-mentioned after resistance R3 with triode Q1
B poles, the path that converges into of voltage-regulator diode IC1 output end, triode Q2 c poles be connected to sampling resistor R4 output end with
Between voltage-regulator diode IC1 input, electric capacity C3, and triode Q2 b are provided between the triode Q2 b poles and c poles
Pole is all connected to transient state suppression circuit module with c poles.
4. a kind of constant-current source suppressed based on transient state with soft start according to claim 3, it is characterised in that the transient state
Suppression circuit module includes resistance R1, resistance R2, triode Q3, wherein resistance R1 input connection diode D1 negative pole with
The path output that diode D2 negative pole is converged into, resistance R1 output end converges into a path company with triode Q3 b poles
Resistance R2 input is connected to, the e poles of the triode Q3 are connected to triode Q2 b poles and electric capacity C3 negative pole, triode
Q3 c poles are connected to sampling resistor R4 output end, and the output end of sampling resistor R4 output end also with resistance R2 converges into one
Bar path is connected to diode D3, diode D4 positive pole.
5. a kind of constant-current source suppressed based on transient state with soft start according to claim 4, it is characterised in that three pole
Pipe Q1 is NPN type triode, and triode Q2, triode Q3 are PNP type triode.
6. a kind of constant-current source suppressed based on transient state with soft start according to claim 4, it is characterised in that the electric capacity
C1, C2, C5 select pressure-resistant more than 400V electric capacity, and electric capacity C3 selects electrodeless electric capacity, and pressure-resistant more than 16v, all resistance are used
1w resistance, and sampling resistor R4 resistance between the Ω of 125 Ω~140.
7. a kind of constant-current source implementation method suppressed based on transient state with soft start, it is characterised in that based on foregoing circuit, it is realized
Process is：When power on or power-off, soft start circuit module control completes soft start so that diode gradually lights, together
When transient state suppression circuit module bleed off circuit is provided so that whole circuit normal work, constant-current circuit when moment starts or powered off
The electric current that module then keeps flow through Constant Current Load is invariable.
8. a kind of constant-current source implementation method suppressed based on transient state with soft start according to claim 7, it is characterised in that
In power on, electric capacity C3 is equivalent to short circuit, and power supply is through resistance R3, triode Q2 b poles and e poles, electric capacity C3 to ground, at this moment
Triode Q2 saturation conductions, triode Q1 ends because of no base current, and LED does not light；After charging after a while,
Electric capacity C3 both end voltages are slowly raised, and triode Q2 base currents are gradually reduced until cut-off, and at this moment triode Q1 is gradually turned on,
LED slowly lights, and completes soft start-up process.
9. a kind of constant-current source implementation method suppressed based on transient state with soft start according to claim 7, it is characterised in that
In the transient state suppression circuit module, when the power is turned on, load RL two ends absorb impact jointly with electric capacity C5；When circuit is normal
During work suddenly have a power failure after not only at once incoming call or just after power remove but also at once open when, due to electric capacity C3 both end voltages not
It can be mutated, at this moment soft starting circuit failure provides bleed off path for electric capacity C3 by transient state suppression circuit module, make triode Q3
Also can saturation conduction, the voltage bleed off on electric capacity C3 is fallen, so as to ensure the normal work of circuit.
10. a kind of constant-current source implementation method suppressed based on transient state with soft start according to claim 7, its feature is existed
In when LED electric current increase or reduction, the voltage drop at sampling resistor R4 two ends is also and then raised and lowered, voltage-regulator diode
IC1 input terminal voltage also changes therewith, so as to control the current potential of triode Q1 base stages, the electric current for keeping flow through Constant Current Load is permanent
It is fixed constant.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470825A (en) * | 2018-12-26 | 2019-03-15 | 南京北路自动化系统有限责任公司 | A kind of low-power consumption methane transducer of remote power-feeding |
| CN110056500A (en) * | 2019-05-30 | 2019-07-26 | 中防工程科技有限公司 | A kind of anti-corrosion air compressor unloading valve-regulated devices |
| CN111799998A (en) * | 2020-04-10 | 2020-10-20 | 西门子电动汽车动力总成系统(上海)有限公司 | Converter suitable for high-voltage electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977474A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
| US20130249406A1 (en) * | 2012-03-26 | 2013-09-26 | Fairchild Korea Semiconductor Ltd. | LED Emitting Device and Driving Method Thereof |
| CN103529891A (en) * | 2012-07-06 | 2014-01-22 | 国民技术股份有限公司 | Soft start device and method |
| CN205142628U (en) * | 2015-11-19 | 2016-04-06 | 程奕 | Multi -functional LED safety power supply circuit |
-
2017
- 2017-04-14 CN CN201710244702.8A patent/CN106998150A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977474A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
| US20130249406A1 (en) * | 2012-03-26 | 2013-09-26 | Fairchild Korea Semiconductor Ltd. | LED Emitting Device and Driving Method Thereof |
| CN103529891A (en) * | 2012-07-06 | 2014-01-22 | 国民技术股份有限公司 | Soft start device and method |
| CN205142628U (en) * | 2015-11-19 | 2016-04-06 | 程奕 | Multi -functional LED safety power supply circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470825A (en) * | 2018-12-26 | 2019-03-15 | 南京北路自动化系统有限责任公司 | A kind of low-power consumption methane transducer of remote power-feeding |
| CN109470825B (en) * | 2018-12-26 | 2024-05-31 | 南京北路智控科技股份有限公司 | Remote power supply low-power consumption methane sensor |
| CN110056500A (en) * | 2019-05-30 | 2019-07-26 | 中防工程科技有限公司 | A kind of anti-corrosion air compressor unloading valve-regulated devices |
| CN110056500B (en) * | 2019-05-30 | 2020-06-30 | 温岭市宇森机电有限公司 | Air compressor emptying valve adjusting device for corrosion prevention |
| CN111799998A (en) * | 2020-04-10 | 2020-10-20 | 西门子电动汽车动力总成系统(上海)有限公司 | Converter suitable for high-voltage electronic equipment |
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