CN106455204A - LED drive power supply circuit for suppressing inrush current - Google Patents
LED drive power supply circuit for suppressing inrush current Download PDFInfo
- Publication number
- CN106455204A CN106455204A CN201610859582.8A CN201610859582A CN106455204A CN 106455204 A CN106455204 A CN 106455204A CN 201610859582 A CN201610859582 A CN 201610859582A CN 106455204 A CN106455204 A CN 106455204A
- Authority
- CN
- China
- Prior art keywords
- circuit
- power
- cathode output
- output end
- factor correction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
Landscapes
- Rectifiers (AREA)
Abstract
The invention provides an LED drive power supply circuit for suppressing inrush current. The LED drive power supply circuit is provided with an EMI filter circuit connected to original AC, an input rectifier circuit connected to the EMI filter circuit and a DC/DC conversion circuit connected to the input rectifier circuit, wherein the DC/DC conversion circuit outputs an LED DC power supply source; the LED drive power supply circuit is also provided with an inrush AC suppression circuit between the input rectifier circuit and the DC/DC conversion circuit; the inrush AC suppression circuit comprises a power factor correction circuit and an inrush AC suppression main circuit which are connected with each other; the power factor correction circuit is connected with the input rectifier circuit; and the inrush AC suppression main circuit is connected with the DC/DC conversion circuit. According to the LED drive power supply circuit for suppressing the inrush current provided by the invention, the inrush AC suppression circuit is added to the input rectifier circuit and the DC/DC conversion circuit to suppress the inrush current; the parallel connection quantity of LED drive power supplies is increased; the wiring cost is reduced; and good economic benefits are brought to a user.
Description
Technical field
The present invention relates to LED power actuation techniques field, more particularly to a kind of LED drive power electricity of suppression inrush current
Road.
Background technology
With the development of LED industry, LED illumination technology is constantly ripe.The light source product being made up of LED with its specular removal,
The advantages of long-life, the LED illumination industry entry high speed development stage is made, which replaces traditional lighting products at last.But start in LED
Moment, LED drive power can produce current spike, referred to as inrush current to original alternating current, and the inrush current can cause sky
Air cock trips.And existing industry technology is the quantity used in parallel by minimizing LED power, air switch is avoided to trip,
But, this way can increase the wiring cost of circuit.Therefore prior art is by increase air switch surplus and to increase cloth
Line density, if using identical LED drive power quantity, existing industry technology can increase 4-8 times of wiring cost, not only cloth
Line is loaded down with trivial details to return user and brings certain economic loss.
Content of the invention
The present invention provides a kind of LED drive power circuit of suppression inrush current, solves by input rectification circuit
Set up and DC/DC change-over circuit between and charge into exchange suppression circuit to suppress the technical problem of inrush current.
For solving above technical problem, the present invention provides a kind of LED drive power circuit of suppression inrush current, is provided with and connects
The EMI filter circuit for entering original alternating current, the input rectification circuit for connecting the EMI filter circuit and to be connected to the input whole
The DC/DC change-over circuit of current circuit, the DC/DC change-over circuit exports LED DC power supply；Be additionally provided be connected to described defeated
Enter and charge into exchange suppression circuit between rectification circuit and DC/DC change-over circuit；The exchange suppression circuit of charging into includes mutually
The power-factor correction circuit of connection, exchange suppression main circuit is charged into, the power-factor correction circuit connection input is whole
Current circuit, the exchange suppression main circuit of charging into connects the DC/DC change-over circuit；Equivalent drive circuit is additionally provided with, described etc.
Effect drive circuit is connected to the power-factor correction circuit and charges between exchange suppression main circuit, or is connected to described defeated
Enter between rectification circuit and power-factor correction circuit, or be connected between the EMI filter circuit and input rectification circuit.
Further, the activation equivalent circuit is provided with the first equivalent resistance and the second equivalent resistance, and described first is equivalent
One end of second equivalent resistance of one end connection of resistance, the other end of first equivalent resistance and second equivalent resistance
The other end connects the cathode output end of the power-factor correction circuit and cathode output end or input rectifying electricity respectively
The cathode output end on road and the cathode output end and cathode output end of cathode output end or the EMI filter circuit；The work(
The cathode output end of rate factor correction circuit and cathode output end are also connected with the DC/DC change-over circuit, the input rectifying electricity
The cathode output end on road and cathode output end are also connected with the power-factor correction circuit, and the positive pole of the EMI filter circuit is defeated
Go out end and cathode output end is also connected with the input rectification circuit.
Further, the exchange suppression main circuit of charging into is provided with energy storage filter capacitor, active switch and current-limiting resistance；
The energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit and is opened with the first of the active switch
Close between break-make end, or be connected to the cathode output end of the power-factor correction circuit and open with the second of the active switch
Close between break-make end；
Active open with described when the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit
When between the first switch break-make end of pass, the negative pole end of the energy storage filter capacitor connects the negative of the power-factor correction circuit
Pole outfan, the positive terminal of the energy storage filter capacitor connects the first switch break-make end of the active switch, described active opens
The switch on and off drive end of pass connects the connection end of first equivalent resistance and the second equivalent resistance, and the of the active switch
Two switch on and off ends connect the cathode output end of the power-factor correction circuit；
Active open with described when the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit
When between the second switch break-make end of pass, the positive terminal of the energy storage filter capacitor is just connecting the power-factor correction circuit
Pole outfan, the negative pole end of the energy storage filter capacitor connects the second switch break-make end of the active switch, described active opens
The switch on and off drive end of pass connects the connection end of first equivalent resistance and the second equivalent resistance, and the of the active switch
The cathode output end of one switch on and off end connection power-factor correction circuit；
Current-limiting resistance is connected between the first switch break-make end of the active switch and second switch break-make end.
Further, first equivalent resistance and the second equivalent resistance are equivalent to resistance for presenting resistance characteristic
Two groups of passive elements.
A kind of LED drive power circuit of suppression inrush current that the present invention is provided, turns in input rectification circuit and DC/DC
Change circuit be additionally arranged charge into exchange suppression circuit and controlled by equivalent active circuit active switch break-make it is achieved thereby that
Suppression inrush current.Compared with prior art, under identical wiring cost, the quantity used in parallel of LED drive power increases；
Under identical LED drive power quantity, wiring cost reduce 4-8 times, this not only simplify wiring also cost-effective, again minimizing work(
Consumption, brings good economic benefit to user.
Description of the drawings
Fig. 1 is the physical circuit schematic diagram that the embodiment of the present invention 1 is provided；
Fig. 2 is the physical circuit schematic diagram that the embodiment of the present invention 2 is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described.The value size of following components and parts is only preferred embodiment, does not constitute limiting the scope of the invention.
Embodiment 1
Referring to Fig. 1, it is the circuit theory diagrams of the offer of the embodiment of the present invention 1.In the present embodiment, with reference to Fig. 1-1, described
A kind of suppression inrush current LED drive power circuit, be provided with accesses original alternating current EMI filter circuit 10, connection described in
The input rectification circuit 20 of EMI filter circuit 10 and the DC/DC change-over circuit 30 for being connected to the input rectification circuit 20, described
DC/DC change-over circuit 30 exports LED DC power supply, a kind of LED drive power circuit of described suppression inrush current, also
Be provided be connected between the input rectification circuit 20 and DC/DC change-over circuit 30 charging into exchange suppression circuit 40；Described prominent
Enter to exchange suppression circuit 40 include interconnective power-factor correction circuit PFC with charge into exchange suppression main circuit 41, described
Power-factor correction circuit PFC connects the input rectification circuit 20, and the exchange suppression main circuit 41 of charging into connects the DC/
DC change-over circuit 30, a kind of LED drive power circuit of described suppression inrush current, it is additionally provided with equivalent drive circuit 50, institute
State equivalent drive circuit 50 to be connected to the power-factor correction circuit PFC and charge between exchange suppression main circuit 41.
In the present embodiment, the activation equivalent circuit 50 is provided with the first equivalent resistance R1 and the second equivalent resistance R2, institute
The one end for stating the first equivalent resistance R1 connects one end of the second equivalent resistance R2, the other end of the first equivalent resistance R1 and institute
The other end for stating the second equivalent resistance R2 connects cathode output end and the negative pole output of the power-factor correction circuit PFC respectively
End；The cathode output end of the power-factor correction circuit PFC and cathode output end are also connected with the DC/DC change-over circuit 30.
In the present embodiment, the exchange suppression main circuit of charging into is provided with energy storage filter capacitor C, active switch N ditch metal-oxide-semiconductor
Q and current-limiting resistance R3；The energy storage filter capacitor C is connected to the cathode output end of the power-factor correction circuit PFC and institute
The first switch break-make end of active switch N ditch metal-oxide-semiconductor Q is stated i.e. between source S；The negative pole end connection of the energy storage filter capacitor C
The cathode output end of the power-factor correction circuit PFC, the positive terminal of the energy storage filter capacitor C connects the active switch
The first switch break-make end of N ditch metal-oxide-semiconductor Q is source S, and the switch on and off drive end of the active switch N ditch metal-oxide-semiconductor Q is grid G
Connect the of the connection end conj of the first equivalent resistance R1 and the second equivalent resistance R2, the active switch N ditch metal-oxide-semiconductor Q
Two switch on and off ends are the cathode output end that drain D connects the power-factor correction circuit PFC；The active switch N ditch MOS
The first switch break-make end of pipe Q is that source S and second switch break-make end are connected with current-limiting resistance R3 between drain D.
In the present embodiment, in circuit powered on moment, energy storage filter capacitor C is charged through current-limiting resistance R3, by current-limiting resistance
R3 (and source impedance) limits peak value surge current and the current ramp that energy storage filter capacitor C causes, by controlling current limliting electricity
The time constant of resistance R3 and energy storage filter capacitor C, just can achieve suppression inrush current.Once input current drops to normal water
Flat, it is that grid G drives that activation equivalent circuit 50 just activates the switch on and off drive end of active switch N ditch metal-oxide-semiconductor Q, accurately controls
The service time of active switch N ditch metal-oxide-semiconductor Q and the voltage-transition at current-limiting resistance R3 two ends.In actual applications, low after opening
RDS(ON)(the second switch break-make end of active switch N ditch metal-oxide-semiconductor Q is drain D with first switch break-make end i.e. between source S to characteristic
After conducting, second switch break-make end is that the resistance value of drain D, first switch break-make end i.e. between source S is very low) will be most
Limits ground reduces the impact to LED drive power efficiency.
In the present embodiment, with reference to Fig. 1-2, the activation equivalent circuit 50 can also be connected to the input rectification circuit
Between 20 and power-factor correction circuit PFC, one end of the first equivalent resistance R1 connects one end of the second equivalent resistance R2,
The other end of the other end of the first equivalent resistance R1 and the second equivalent resistance R2 connects input rectifying electricity respectively
The cathode output end on road 20 and cathode output end；With reference to Fig. 1-3, the activation equivalent circuit 50 can also be connected to the EMI
Between filter circuit 10 and input rectification circuit 20, one end of the first equivalent resistance R1 connects the one of the second equivalent resistance R2
End, the other end of the other end of the first equivalent resistance R1 and the second equivalent resistance R2 connects EMI filtering respectively
The cathode output end of circuit 10 and cathode output end.
In the present embodiment, the first equivalent resistance R1 and the second equivalent resistance R2 refer under specified conditions, be in
Reveal the characteristic of resistive element and two groups of passive elements of resistance can be equivalent to；The active switch N ditch metal-oxide-semiconductor Q can also
It is other three ends active switch such as mos field effect transistor (MOSFE), power transistor by equivalence replacement
(Power Transistor), controllable silicon (Silicon Controlled Rectifier) or relay (Relay).
Embodiment 2
Referring to Fig. 2, it is the circuit theory diagrams of the offer of the embodiment of the present invention 2.In the present embodiment, with reference to Fig. 2-1, described
A kind of suppression inrush current LED drive power circuit, be provided with accesses original alternating current EMI filter circuit 10, connection described in
The input rectification circuit 20 of EMI filter circuit 10 and the DC/DC change-over circuit 30 for being connected to the input rectification circuit 20, described
DC/DC change-over circuit 30 exports LED DC power supply, a kind of LED drive power circuit of described suppression inrush current, also
Be provided be connected between the input rectification circuit 20 and DC/DC change-over circuit 30 charging into exchange suppression circuit 40；Described prominent
Enter to exchange suppression circuit 40 include interconnective power-factor correction circuit PFC with charge into exchange suppression main circuit 41, described
Power-factor correction circuit PFC connects the input rectification circuit 20, and the exchange suppression main circuit 41 of charging into connects the DC/
DC change-over circuit 30, a kind of LED drive power circuit of described suppression inrush current, it is additionally provided with equivalent drive circuit 50, institute
State equivalent drive circuit 50 to be connected to the power-factor correction circuit PFC and charge between exchange suppression main circuit 41.
In the present embodiment, the activation equivalent circuit 50 is provided with the first equivalent resistance R1 and the second equivalent resistance R2, institute
The one end for stating the first equivalent resistance R1 connects one end of the second equivalent resistance R2, the other end of the first equivalent resistance R1 and institute
The other end for stating the second equivalent resistance R2 connects cathode output end and the negative pole output of the power-factor correction circuit PFC respectively
End；The cathode output end of the power-factor correction circuit PFC and cathode output end are also connected with the DC/DC change-over circuit 30.
In the present embodiment, the exchange suppression main circuit 41 of charging into is provided with energy storage filter capacitor C, active switch N ditch MOS
Pipe Q and current-limiting resistance R3；The energy storage filter capacitor C be connected to the cathode output end of the power-factor correction circuit PFC with
The second switch break-make end of the active switch N ditch metal-oxide-semiconductor Q is between drain D；The positive terminal of the energy storage filter capacitor C is even
Connect the cathode output end of the power-factor correction circuit PFC, the negative pole end connection of the energy storage filter capacitor C is described active to open
The second switch break-make end for closing N ditch metal-oxide-semiconductor Q is drain D；The switch on and off drive end of the active switch N ditch metal-oxide-semiconductor Q is grid
Pole G connects the connection end con j, the active switch N ditch metal-oxide-semiconductor Q of the first equivalent resistance R1 and the second equivalent resistance R2
Second switch break-make end be cathode output end that source S connects the power-factor correction circuit PFC；The active switch N
The first switch break-make end of ditch metal-oxide-semiconductor Q is that source S and second switch break-make end are connected with current-limiting resistance R3 between drain D.
In the present embodiment, in circuit powered on moment, energy storage filter capacitor C is charged through current-limiting resistance R3, by current-limiting resistance
R3 (and source impedance) limits peak value surge current and the current ramp that energy storage filter capacitor C causes, by controlling current limliting electricity
The time constant of resistance R3 and energy storage filter capacitor C, just can achieve suppression inrush current.Once input current drops to normal water
Flat, it is that grid G drives that activation equivalent circuit 50 just activates the switch on and off drive end of active switch N ditch metal-oxide-semiconductor Q, accurately controls
The service time of active switch N ditch metal-oxide-semiconductor Q and the voltage-transition at current-limiting resistance R3 two ends.In actual applications, low after opening
RDS(ON)(the second switch break-make end of active switch N ditch metal-oxide-semiconductor Q is drain D with first switch break-make end i.e. between source S to characteristic
After conducting, second switch break-make end is that the resistance value of drain D, first switch break-make end i.e. between source S is very low) will be most
Limits ground reduces the impact to LED drive power efficiency.
In the present embodiment, with reference to Fig. 2-2, the activation equivalent circuit 50 can also be connected to the input rectification circuit
Between 20 and power-factor correction circuit PFC, one end of the first equivalent resistance R1 connects one end of the second equivalent resistance R2,
The other end of the other end of the first equivalent resistance R1 and the second equivalent resistance R2 connects input rectifying electricity respectively
The cathode output end on road 20 and cathode output end；With reference to Fig. 2-3, the activation equivalent circuit 50 can also be connected to the EMI
Between filter circuit 10 and input rectification circuit 20, one end of the first equivalent resistance R1 connects the one of the second equivalent resistance R2
End, the other end of the other end of the first equivalent resistance R1 and the second equivalent resistance R2 connects EMI filtering respectively
The cathode output end of circuit 10 and cathode output end.
In the present embodiment, the first equivalent resistance R1 and the second equivalent resistance R2 refer under specified conditions, be in
Reveal the characteristic of resistive element and two groups of passive elements of resistance can be equivalent to；The active switch N ditch metal-oxide-semiconductor Q can also
It is other three ends active switch such as mos field effect transistor (MOSFE), power transistor by equivalence replacement
(Power Transistor), controllable silicon (Silicon Controlled Rectifier) or relay (Relay).
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (4)
1. a kind of LED drive power circuit of suppression inrush current, is provided with EMI filter circuit, the connection for accessing original alternating current
The input rectification circuit of the EMI filter circuit and the DC/DC change-over circuit for being connected to the input rectification circuit, the DC/
DC change-over circuit exports LED DC power supply, it is characterised in that is additionally provided with and is connected to the input rectification circuit and DC/DC
Exchange suppression circuit is charged between change-over circuit；The exchange suppression circuit of charging into includes interconnective power-factor correction
Circuit, exchange suppression main circuit is charged into, the power-factor correction circuit connects the input rectification circuit, described charge into exchange
Suppression main circuit connects the DC/DC change-over circuit；Equivalent drive circuit is additionally provided with, the equivalent drive circuit is connected to described
Power-factor correction circuit and charge between exchange suppression main circuit, or be connected to the input rectification circuit and power factor (PF)
Between circuit for rectifying, or it is connected between the EMI filter circuit and input rectification circuit.
2. as claimed in claim 1 a kind of suppression inrush current LED drive power circuit, it is characterised in that：The activation
Equivalent circuit is provided with the first equivalent resistance and the second equivalent resistance, and one end of first equivalent resistance connects the second equivalent resistance
One end, the other end of the other end of first equivalent resistance and second equivalent resistance connects the power factor (PF) respectively
The cathode output end of circuit for rectifying and the cathode output end and cathode output end of cathode output end or the input rectification circuit
Or cathode output end and the cathode output end of the EMI filter circuit；The cathode output end of the power-factor correction circuit
The DC/DC change-over circuit, the cathode output end of the input rectification circuit and cathode output end are also connected with cathode output end
It is also connected with the power-factor correction circuit, the cathode output end of the EMI filter circuit and cathode output end are also connected with described
Input rectification circuit.
3. as claimed in claim 1 or 2 a kind of suppression inrush current LED drive power circuit, it is characterised in that：Described prominent
Enter exchange suppression main circuit and be provided with energy storage filter capacitor, active switch and current-limiting resistance；The energy storage filter capacitor is connected to institute
State between the cathode output end of power-factor correction circuit and the first switch break-make end of the active switch, or be connected to institute
State between the cathode output end of power-factor correction circuit and the second switch break-make end of the active switch；
When the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit and the active switch
When between first switch break-make end, the negative pole that the negative pole end of the energy storage filter capacitor connects the power-factor correction circuit is defeated
Go out end, the positive terminal of the energy storage filter capacitor connects the first switch break-make end of the active switch, the active switch
Switch on and off drive end connects the connection end of first equivalent resistance and the second equivalent resistance, and the second of the active switch opens
Close the cathode output end that break-make end connects the power-factor correction circuit；
When the energy storage filter capacitor is connected to the cathode output end of the power-factor correction circuit and the active switch
When between second switch break-make end, the positive pole that the positive terminal of the energy storage filter capacitor connects the power-factor correction circuit is defeated
Go out end, the negative pole end of the energy storage filter capacitor connects the second switch break-make end of the active switch, the active switch
Switch on and off drive end connects the connection end of first equivalent resistance and the second equivalent resistance, and the first of the active switch opens
Close the cathode output end that break-make end connects power-factor correction circuit；
Current-limiting resistance is connected between the first switch break-make end of the active switch and second switch break-make end.
4. as claimed in claim 2 a kind of suppression inrush current LED drive power circuit, it is characterised in that：Described first
Equivalent resistance and the second equivalent resistance are two groups of passive elements for presenting resistance characteristic and being equivalent to resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859582.8A CN106455204A (en) | 2016-09-28 | 2016-09-28 | LED drive power supply circuit for suppressing inrush current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859582.8A CN106455204A (en) | 2016-09-28 | 2016-09-28 | LED drive power supply circuit for suppressing inrush current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106455204A true CN106455204A (en) | 2017-02-22 |
Family
ID=58170071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610859582.8A Pending CN106455204A (en) | 2016-09-28 | 2016-09-28 | LED drive power supply circuit for suppressing inrush current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106455204A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420780A (en) * | 1993-12-30 | 1995-05-30 | Omega Power Systems | Apparatus for limiting inrush current |
| CN101523679A (en) * | 2006-09-30 | 2009-09-02 | 奥斯兰姆施尔凡尼亚公司 | Power supply and electronic ballast with auxiliary protection circuit |
| CN101594046A (en) * | 2008-05-29 | 2009-12-02 | 洋鑫科技股份有限公司 | Inrush current limiter |
| CN202042894U (en) * | 2011-05-16 | 2011-11-16 | 厦门玛司特电子工业有限公司 | Thermistor short-circuit circuit for limiting inrush current of relay |
| CN102624210A (en) * | 2012-03-29 | 2012-08-01 | 上海交通大学 | Soft start circuit |
| US20130300312A1 (en) * | 2008-09-18 | 2013-11-14 | David Tikkanen | Configurable led driver/dimmer for solid state lighting applications |
| CN205249042U (en) * | 2015-12-15 | 2016-05-18 | 深圳优博聚能科技有限公司 | Reduce switching power supply input impulse current's circuit |
| CN206650866U (en) * | 2016-09-28 | 2017-11-17 | 惠州市华阳光电技术有限公司 | A kind of LED drive power circuit for suppressing inrush current |
-
2016
- 2016-09-28 CN CN201610859582.8A patent/CN106455204A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420780A (en) * | 1993-12-30 | 1995-05-30 | Omega Power Systems | Apparatus for limiting inrush current |
| CN101523679A (en) * | 2006-09-30 | 2009-09-02 | 奥斯兰姆施尔凡尼亚公司 | Power supply and electronic ballast with auxiliary protection circuit |
| CN101594046A (en) * | 2008-05-29 | 2009-12-02 | 洋鑫科技股份有限公司 | Inrush current limiter |
| US20130300312A1 (en) * | 2008-09-18 | 2013-11-14 | David Tikkanen | Configurable led driver/dimmer for solid state lighting applications |
| CN202042894U (en) * | 2011-05-16 | 2011-11-16 | 厦门玛司特电子工业有限公司 | Thermistor short-circuit circuit for limiting inrush current of relay |
| CN102624210A (en) * | 2012-03-29 | 2012-08-01 | 上海交通大学 | Soft start circuit |
| CN205249042U (en) * | 2015-12-15 | 2016-05-18 | 深圳优博聚能科技有限公司 | Reduce switching power supply input impulse current's circuit |
| CN206650866U (en) * | 2016-09-28 | 2017-11-17 | 惠州市华阳光电技术有限公司 | A kind of LED drive power circuit for suppressing inrush current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205812458U (en) | A kind of LED linear constant-current drive circuit and LED light device | |
| CN106374599B (en) | A kind of intelligent charger for electric bicycle | |
| CN105247773B (en) | A kind of full-controlled bridge fairing with Surge suppression | |
| CN206595898U (en) | Secondary inverse-excitation type switch power-supply based on SP6650 | |
| CN105935006B (en) | A kind of LED drive circuit of compatible silicon controlled light modulator | |
| CN206249131U (en) | Power protecting circuit and supply unit | |
| CN104811175A (en) | Low-power consumption single-firing line electronic switch | |
| CN108199461B (en) | Alternating current-direct current conversion circuit with charging function | |
| CN206650866U (en) | A kind of LED drive power circuit for suppressing inrush current | |
| CN102984859A (en) | Light-emitting diode (LED) driving circuit and light-emitting diode (LED) driving device | |
| CN106455204A (en) | LED drive power supply circuit for suppressing inrush current | |
| CN107634669A (en) | The power circuit and its control method of position-sensor-free permagnetic synchronous motor | |
| CN102480134B (en) | A kind of solar recharging system | |
| CN205693558U (en) | A kind of output overvoltage protection circuit and Switching Power Supply | |
| CN205622496U (en) | Discharge circuit and ac energisation device | |
| CN209170218U (en) | A kind of PFC boost main power circuit | |
| CN203968465U (en) | A kind of simple great power LED lamp driving power source efficiently | |
| CN102790538B (en) | Electric energy meter and RC power supply thereof | |
| CN207460021U (en) | The power circuit of position-sensor-free permanent magnet synchronous motor | |
| CN106783401A (en) | A kind of energy-saving resistance-capacitance depressurization relay drive circuit | |
| CN206498559U (en) | A kind of power starting circuit, power supply and LED | |
| CN205610334U (en) | Access control system supply circuit | |
| CN205744227U (en) | Fuel solenoid valve power supply circuits for diesel engine | |
| CN104426173A (en) | Charging circuit | |
| CN203872058U (en) | DC power supply conversion circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170222 |