CN104218790B - DC voltage stabilization circuit with soft start and lamp - Google Patents
DC voltage stabilization circuit with soft start and lamp Download PDFInfo
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- CN104218790B CN104218790B CN201310210359.7A CN201310210359A CN104218790B CN 104218790 B CN104218790 B CN 104218790B CN 201310210359 A CN201310210359 A CN 201310210359A CN 104218790 B CN104218790 B CN 104218790B
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Abstract
The invention proposes a DC voltage stabilization circuit with a soft start. The DC voltage stabilization circuit comprises a voltage stabilization unit and a soft start unit, wherein the voltage stabilization unit comprises an input end, an output end and a control end, the input end of the voltage stabilization unit is connected with a first power supply, the output end of the voltage stabilization unit is connected with a load, the soft start unit comprises an input end and an output end, the input end of the soft start unit is connected with a second power supply, the output end of the soft start unit is connected with the control end of the voltage stabilization unit, and after the soft start unit detects that the power supply is energized with the first power supply, the output voltage of the voltage stabilization unit is controlled to slowly rise. The invention also proposes a lamp. With the adoption of the DC voltage stabilization circuit, the circuit can be protected from not being damaged by surge current.
Description
Technical field
The present invention relates to a kind of mu balanced circuit, more particularly to a kind of direct current regulation circuit with soft start and light fixture.
Background technology
Many power supplys (particularly high power switching power supply), all have the shortcomings that one it is intrinsic：To draw in power-up moment
One larger electric current.This surge current is likely to be breached 10 times～100 times of power supply static working current.This is in circuit
For element, undoubtedly one is endangered source, or even causes other the power-equipment instant power-downs using same input power.
The content of the invention
The technical problem to be solved in the present invention is to overcome the shortcomings of that above-mentioned prior art is present, and proposes that a kind of direct current is steady
Volt circuit and light fixture, can solve the problem that the immediate current in circuit start is excessive and occur that surge current is hurtful to circuit to ask
Topic.
To solve above-mentioned technical problem, the present invention proposes a kind of direct current regulation circuit with soft start, and which includes：Voltage stabilizing list
Unit, which includes input, outfan and control end, and the input of voltage regulation unit connects the first power supply, the output of voltage regulation unit
End connection load；And soft start unit, which includes input and outfan, and the input connection second of soft start unit is electric
Source, the outfan of soft start unit connect the control end of voltage regulation unit；Wherein, to detect circuit ON first electric for soft start unit
Behind source, the output voltage for controlling voltage regulation unit slowly rises.
Preferably, soft start unit include first resistor, second resistance, the first electric capacity, operational amplifier, referrer module with
And switching tube, switching tube includes control end, input and outfan, and first resistor, the first electric capacity are sequentially connected in series in soft start
Between the input and ground of unit, the in-phase end of operational amplifier connects the junction of first resistor and the first electric capacity, and computing is put
The end of oppisite phase connection referrer module of big device, the control end of connecting valve pipe after the outfan connection second resistance of operational amplifier,
The input of switching tube connects the outfan of soft start unit, the output head grounding of switching tube.
Preferably, referrer module includes that 3rd resistor and the 4th resistance, 3rd resistor and the 4th resistance are sequentially connected in series
Between the input and ground of soft start unit, the junction concatenation operation amplifier of 3rd resistor and the 4th resistance it is anti-phase
End.
Preferably, referrer module is a stabilized power source.
Preferably, switching tube is audion, and the control end of the base stage of audion for switching tube, the transmitting of audion are extremely opened
Close the input of pipe, the outfan of the current collection extremely switching tube of audion.
Preferably, soft start unit also includes the first stabilivolt, and the first stabilivolt is in parallel with first resistor.
Preferably, voltage regulation unit includes that three rectify Voltagre regulator, the 5th resistance and the 6th resistance, and three proper voltages are steady
The input of depressor connects the input of voltage regulation unit, and three outfans for rectifying Voltagre regulator connect the output of voltage regulation unit
End, the 6th resistance are connected between three outfans and control end for rectifying Voltagre regulator, and three rectify the control of Voltagre regulator
End processed is grounded after connecting the 5th resistance.
Preferably, direct current regulation circuit also includes low frequency filtering electric capacity and high-frequency filter capacitor, low frequency filtering electric capacity with
And high-frequency filter capacitor is connected in parallel between the first power supply and ground.
The present invention also proposes a kind of light fixture, including the direct current regulation circuit with soft start as above.
Compared with prior art, the direct current regulation circuit with soft start of the invention and light fixture, are existed by control circuit
The moment of connection, output voltage is made slowly to increase from low to high, it is to avoid the appearance of surge current, so as to protection circuit.
Description of the drawings
Fig. 1 is the circuit structure diagram of the direct current regulation circuit of the present invention.
Description of reference numerals is as follows：Proper Voltagre regulator IC1 the 6th resistance R6 of the 5th resistance R5 of voltage regulation unit 1 three are soft to be opened
The 4th resistance of 2 21 3rd resistor R3 of first resistor R1 second resistance R2 the first electric capacity C1 operational amplifier U1 referrer modules of moving cell
R4 audions the first stabilivolts of Q1 D3 load LOAD low frequency filtering electric capacity C2 high-frequency filter capacitors C3 the first transformator T1 first are whole
Stream device D1 the second transformator T1 the second commutator D2.
Specific embodiment
In order to further illustrate the principle and structure of the present invention, the preferred embodiments of the present invention are carried out in detail in conjunction with accompanying drawing
Describe in detail bright.
Fig. 1 is referred to, the direct current regulation circuit with soft start of the present invention includes voltage regulation unit 1 and soft start unit 2.
Voltage regulation unit 1 includes input, outfan and control end, and the input of voltage regulation unit 1 connects the first power supply, voltage regulation unit 1
Outfan connection load LOAD.Soft start unit 2 includes input and outfan, the input connection of soft start unit 2
Second source, the outfan of soft start unit 2 connect the control end of voltage regulation unit 1.Wherein, soft start unit 2 detects circuit
After connecting the first power supply, the output voltage for controlling voltage regulation unit 1 slowly rises.
Voltage regulation unit 1 includes that three rectify Voltagre regulator IC1, the 5th resistance R5 and the 6th resistance R6.Three rectify voltage
The input of manostat IC1 connects the input of voltage regulation unit 1, and three rectify the outfan connection voltage stabilizing list of Voltagre regulator IC1
The outfan of unit 1, the 6th resistance R6 are connected between three outfans and control end for rectifying Voltagre regulator IC1, and three rectify
The control end of Voltagre regulator IC1 is grounded after connecting the 5th resistance R5.In the present embodiment, as illustrated, three rectify voltage voltage stabilizing
The port INPUT of device IC1 is three inputs for rectifying Voltagre regulator IC1, and three rectify the port OUTPUT of Voltagre regulator IC1
For three outfans for rectifying Voltagre regulator IC1, the three port ADJ for rectifying Voltagre regulator IC1 are three proper Voltagre regulators
The control end of IC1.The output voltage of three proper Voltagre regulator IC1 scalable between 1.25V to 37V volts, using the teaching of the invention it is possible to provide super
The electric current of 1.5A is crossed, additionally can be judged using Internal current limit, heat and safety operation area compensation is made it to prevent from blowing insurance
Silk.5th resistance R5 is adjustable resistance.
Soft start unit 2 includes first resistor R1, second resistance R2, the first electric capacity C1, operational amplifier U1, referrer module
21st, switching tube and the first stabilivolt D3.Switching tube includes control end, input and outfan.It is first resistor R1, first electric
Hold C1 to be sequentially connected in series between the input and ground of soft start unit 2, in-phase end connection first resistor R1 of operational amplifier U1
With the junction of the first electric capacity C1, the end of oppisite phase connection referrer module 21 of operational amplifier U1, the outfan of operational amplifier U1
The control end of connecting valve pipe after connection second resistance R2, the outfan of the input connection soft start unit 2 of switching tube, switch
The output head grounding of pipe.First stabilivolt D3 is in parallel with first resistor R1.
In the present embodiment, referrer module 21 includes 3rd resistor R3 and the 4th resistance R4.3rd resistor R3 and the 4th
Resistance R4 is sequentially connected in series between the input and ground of soft start unit 2, the junction of 3rd resistor R3 and the 4th resistance R4
The end of oppisite phase of concatenation operation amplifier U1.In other embodiments, referrer module 21 is a stabilized power source.Referrer module 21 is used for
A burning voltage is provided to operational amplifier U1.
In the present embodiment, switching tube is audion Q1, and the base stage of audion Q1 is the control end of switching tube, audion Q1's
The input of transmitting extremely switching tube, the outfan of the current collection extremely switching tube of audion Q1.In other embodiments, switching tube
For metal-oxide-semiconductor, the control end of the grid of metal-oxide-semiconductor for switching tube, the input of the source electrode of metal-oxide-semiconductor for switching tube, the drain electrode of metal-oxide-semiconductor is
The outfan of switching tube.
Direct current regulation circuit also includes low frequency filtering electric capacity C2 and high-frequency filter capacitor C3.Low frequency filtering electric capacity C2 and
High-frequency filter capacitor C3 is connected in parallel between the first power supply and ground, is respectively used to low frequency filtering and High frequency filter.
In the present embodiment, AC220V obtains the first power supply, AC220V through the first transformator T1 and the first commutator D1
Second source is obtained through the second transformator T1 and the second commutator D2.First power supply and second source can be according to power supply need
Ask by the coil turn of regulation transformator to obtain.
The present invention also proposes a kind of light fixture, and light fixture includes the direct current regulation circuit with soft start as above.
Describe the operation principle of the present invention with reference to Fig. 1 in detail.
220V alternating currents through rectifier bridge and big capacity electrolyte capacitor rectification and it is gentle after obtain the first power supply, input three
The input of proper Voltagre regulator IC1.Soft start unit 2 uses an operational amplifier U1 and peripheral component, with reference to three
The output regulatory function of proper Voltagre regulator IC1, realizes the soft start of circuit.Soft start unit 2 is powered by second source, the
The potential-divider network that three resistance R3 and the 4th resistance R4 are constituted provides reference voltage for the end of oppisite phase of operational amplifier U1, and computing is put
The homophase of big device U1 terminates a RC delay circuit.After second source is powered, the first electric capacity C1 is slow by first resistor R1
Be charged, the current potential of the in-phase end of amplifier operational amplifier U1 by being gradually increasing, then, the output voltage of operational amplifier U1
Also it is gradually increasing, the base potential of audion Q1 is uprised by low, gradually becomes cut-off state by conducting state.Rectify electricity according to three
The data of pressure manostat IC1 has：The output voltage of the three outfan OUTPUT for rectifying Voltagre regulator IC1 is, Vout=
1.25V*(1+R5/R6).Vout is by 1.25V, the output voltage values for setting are gradually risen to, output voltage is arrived in 1.25V
Scalable between 37V volts.Output voltage is determined by the resistance of the 5th resistance R5, be can be calculated according to formula above.
Compared with prior art, the direct current regulation circuit with soft start of the invention and light fixture, are existed by control circuit
The moment of connection, output voltage is made slowly to increase from low to high, it is to avoid the appearance of surge current, so as to protection circuit.
The preferable possible embodiments of the present invention are the foregoing is only, is not limited the scope of the invention.It is all to use this
Equivalent structure change done by description of the invention and accompanying drawing content, is all contained in protection scope of the present invention.
Claims (8)
1. a kind of direct current regulation circuit with soft start, it is characterised in which includes：
Voltage regulation unit, which includes input, outfan and control end, and the input of the voltage regulation unit connects the first power supply,
The outfan connection load of the voltage regulation unit；And
Soft start unit, which includes input and outfan, and the input connection second source of the soft start unit is described
The outfan of soft start unit connects the control end of the voltage regulation unit；
The soft start unit includes first resistor, second resistance, the first electric capacity, operational amplifier, referrer module and switch
Pipe, the switching tube include control end, input and outfan, and the first resistor, the first electric capacity are sequentially connected in series described
Between the input and ground of soft start unit, the in-phase end connection first resistor and the first electric capacity of the operational amplifier
Junction, the end of oppisite phase of the operational amplifier connect the referrer module, and the outfan connection of the operational amplifier is described
Connect the control end of the switching tube after second resistance, the input of the switching tube connects the output of the soft start unit
End, the output head grounding of the switching tube；
Wherein, after the soft start unit detects the first power supply described in circuit ON, control the output electricity of the voltage regulation unit
Pressure is slow to be risen.
2. direct current regulation circuit as claimed in claim 1, it is characterised in that the referrer module includes 3rd resistor and
Four resistance, the 3rd resistor and the 4th resistance are sequentially connected in series between the input and ground of the soft start unit, described
The junction of 3rd resistor and the 4th resistance connects the end of oppisite phase of the operational amplifier.
3. direct current regulation circuit as claimed in claim 1, it is characterised in that the referrer module is a stabilized power source.
4. direct current regulation circuit as claimed in claim 1, it is characterised in that the switching tube is audion, the audion
Base stage be the switching tube control end, the input of the extremely described switching tube of transmitting of the audion, the audion
The extremely described switching tube of current collection outfan.
5. direct current regulation circuit as claimed in claim 1, it is characterised in that the soft start unit also includes the first voltage stabilizing
Pipe, first stabilivolt are in parallel with the first resistor.
6. direct current regulation circuit as claimed in claim 1, it is characterised in that the voltage regulation unit includes that three rectify voltage voltage stabilizings
Device, the 5th resistance and the 6th resistance, described three inputs for rectifying Voltagre regulator connect the input of the voltage regulation unit,
Described three outfans for rectifying Voltagre regulator connect the outfan of the voltage regulation unit, and the 6th resistance is connected to described three
Between the outfan and control end of proper Voltagre regulator, described three rectify the control end connection the described 5th of Voltagre regulator
It is grounded after resistance.
7. direct current regulation circuit as claimed in claim 1, it is characterised in that the direct current regulation circuit also includes low frequency filtering
Electric capacity and high-frequency filter capacitor, the low frequency filtering electric capacity and high-frequency filter capacitor are connected in parallel on first power supply with ground
Between.
8. a kind of light fixture, it is characterised in that the light fixture include as described in claim 1 to 7 any one with soft start
Direct current regulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310210359.7A CN104218790B (en) | 2013-05-30 | 2013-05-30 | DC voltage stabilization circuit with soft start and lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310210359.7A CN104218790B (en) | 2013-05-30 | 2013-05-30 | DC voltage stabilization circuit with soft start and lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104218790A CN104218790A (en) | 2014-12-17 |
| CN104218790B true CN104218790B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310210359.7A Active CN104218790B (en) | 2013-05-30 | 2013-05-30 | DC voltage stabilization circuit with soft start and lamp |
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| Country | Link |
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| CN (1) | CN104218790B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947552A (en) * | 2017-12-20 | 2018-04-20 | 四川九洲电器集团有限责任公司 | With anti-reverse and suppression input peak current power module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101355293A (en) * | 2007-07-24 | 2009-01-28 | 青岛海信电器股份有限公司 | Soft startup circuit for power supply |
| CN101478276A (en) * | 2009-01-22 | 2009-07-08 | 金莱克电气股份有限公司 | Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method |
| CN101749551A (en) * | 2010-01-26 | 2010-06-23 | 海洋王照明科技股份有限公司 | Hand-operated rechargeable lamp |
| CN102545683A (en) * | 2010-12-22 | 2012-07-04 | 北京万东鼎立医疗设备有限公司 | Secondary follow-up voltage prestabilizing filament inverter circuit |
| CN102710149A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | Anti-surging switching power supply and corresponding light emitting diode (LED) driving circuit |
-
2013
- 2013-05-30 CN CN201310210359.7A patent/CN104218790B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101355293A (en) * | 2007-07-24 | 2009-01-28 | 青岛海信电器股份有限公司 | Soft startup circuit for power supply |
| CN101478276A (en) * | 2009-01-22 | 2009-07-08 | 金莱克电气股份有限公司 | Method for soy bean milk making machine soft starting and soft closing and control circuit for implementing the method |
| CN101749551A (en) * | 2010-01-26 | 2010-06-23 | 海洋王照明科技股份有限公司 | Hand-operated rechargeable lamp |
| CN102545683A (en) * | 2010-12-22 | 2012-07-04 | 北京万东鼎立医疗设备有限公司 | Secondary follow-up voltage prestabilizing filament inverter circuit |
| CN102710149A (en) * | 2011-03-28 | 2012-10-03 | 海洋王照明科技股份有限公司 | Anti-surging switching power supply and corresponding light emitting diode (LED) driving circuit |
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|---|---|
| CN104218790A (en) | 2014-12-17 |
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