CN205544989U - Non - isolator power of high -efficient high current regulation - Google Patents
Non - isolator power of high -efficient high current regulation Download PDFInfo
- Publication number
- CN205544989U CN205544989U CN201620125161.8U CN201620125161U CN205544989U CN 205544989 U CN205544989 U CN 205544989U CN 201620125161 U CN201620125161 U CN 201620125161U CN 205544989 U CN205544989 U CN 205544989U
- Authority
- CN
- China
- Prior art keywords
- pressure
- wire
- resistance
- electric capacity
- circuit
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Continuous-Control Power Sources That Use Transistors (AREA)
- Rectifiers (AREA)
Abstract
This power provides a non - isolator power of high -efficient high current regulation for the user, and its power efficiency is up to 98%, and far above present switching power supply 90%'s power efficiency, the most characteristic is that this power output current regulation has reached or even 5/100000ths every volts, has surpassed present power level of the same type far away. This power has smallly, and used component arrives even only 15 less, can need not the fin, therefore low cost. Its output can reach 150 tiles, and output voltage reaches as high as 300 and lies prostrate, and minimum 0 volt that is can still have latent dimming function and make the ability function with the short circuit. If be used for the LED lamp, the energy consumption of then having solved the existence of present LED lamps and lanterns drive power supply is great, and power efficiency is high inadequately, needs to use the fin, poor stability, fragile class of technical problem.
Description
Technical field
This utility model relates to a kind of efficient high current regulation Unisolated switch supply unit, and its efficiency is special
Height, steady flow result is good, can do the power supply of multiple electrical equipment, be particularly suitable for making the driving power supply of LED lamp.
Background technology
Most popular Switching Power Supply is isolation type switching power supply, its efficiency typically between 80-90%, this
Meaning that heating is serious, waste energy is many, heat radiation burden weight；And volume is the biggest.The most existing integrated
The Unisolated switch power supply HA22004PB (belonging to HA220XXPB series) changed appears on the market and (on the net may be used
Look into), and be considered as power supply best in same type, its optimum output voltage scope is 150-180 volt,
This voltage range extrinsic current is Rapid Variable Design with change in voltage, cannot say for sure it is real constant current source, maximum defeated
Going out electric current is 60 milliamperes, and equivalent peak power output is about 10 watts, it is seen that its index there is no advantage.This is specially
Li quanren once applied for similar patent (ZL201420732224.7, ZL201220391624.7), but managed not
Thinking, particularly power factor and output current regulation is all far below this patent.
Summary of the invention
In order to solve the described problem that current LED lamp drives power supply to exist, the purpose of this utility model exists
In: providing a kind of efficient high current regulation Unisolated switch power supply for people, its circuit is simple, uses
Element is few, and volume is little, is substantially not much energy loss, it may not be necessary to using fin, efficiency can reach
98%.
This utility model provides the basic technical scheme implemented as follows:
A kind of efficient high current regulation Unisolated switch power supply (see Fig. 1), it is characterised in that: include whole
Stream filter circuit, switching power circuit, inductive energy storage recovery circuit and output constant current circuit；Wherein:
Current rectifying and wave filtering circuit is made up of rectifier bridge stack Br1 and electric capacity C2, two inputs of rectifier bridge stack Br1
End connects 220 volts of electric mains, and there is one end ground connection GND at two ends of its output and other end output voltage
V+, between this output voltage wire V+ and ground wire, tipping has the electric capacity C2 of filtering, constitutes described rectification filter
Wave circuit.
Switching power circuit, by inductance L3, resistance R5, field effect transistor F8, Zener diode D9, electricity
Hold C10, audion T11, resistance R12, resistance R13, electric capacity C14 composition；Wherein, inductance L3
One end is connected with V+ pressure-wire, and its other end is connected with pressure-wire V2, and be connected with pressure-wire V2 also has
One end of electric capacity C10, the drain electrode of field effect transistor F8.The source electrode of field effect transistor F8 is with pressure-wire V4 even
Connecing, pressure-wire V4 is also connected with anode, one end of resistance R12 of Zener diode D9.Electric capacity C10
The other end be connected with the base stage of audion T11 and the other end of resistance R12；The emitter stage of audion T11
Connect outfan OUT pressure-wire.The grid of field effect transistor F8 connect pressure-wire V1, pressure-wire V1 also with
The low-pressure end of resistance R5 and the negative electrode of Zener diode D9 connect, the high-pressure side of resistance R5 and pressure-wire V+
Connect；Resistance R5 is the load resistance of audion T11 colelctor electrode, and the change in voltage of this colelctor electrode passes through phase
Field effect transistor grid even controls the curent change of field effect transistor.
Inductive energy storage recovery circuit is made up of electric capacity C6, diode D4, diode D7；Wherein: electric capacity
One end of C6 is connected with pressure-wire V2, and the other end of electric capacity C6 is connected with V3 pressure-wire, V3 pressure-wire
Also it is connected with negative electrode, the anode of diode D7 of diode D4；The anode of diode D4 is with ground wire even
Connecing, the negative electrode of diode D7 is connected with pressure-wire V4.
Output constant current electrical route resistance R13, electric capacity C14 and electric capacity C15 composition；Wherein: resistance
The high-pressure side of R13, the high-pressure side of electric capacity C14 are connected with pressure-wire V4, the low-pressure end of resistance R13 and electricity
The low-pressure end holding C14 is connected with outfan OUT pressure-wire；Outfan OUT also with the high pressure of electric capacity C15
End connects, the low-pressure end ground connection GND of electric capacity C15.Between outfan OUT and ground wire can external load such as
LED lamp D16.
Additional technical feature is:
(1) (see Fig. 2), the load resistance R5 in described field effect transistor F8 grid circuit more can replace to
The constant-current source circuit being made up of resistance R17, Zener diode D18, audion T19 and resistance R20；Its
The colelctor electrode of middle audion T19 is connected to V1 pressure-wire, and its emitter stage is connected to rectification by resistance R17
In output voltage wire V+ of circuit, its base stage leads up to resistance R20 ground connection GND, another road of this base stage
Arrive its negative electrode by the anode of Zener diode D17 and be connected to output voltage wire V+ of rectification circuit
On.So can improve this electric power outputting current regulation.
(2) electricity being not only connected with output voltage wire V+ in field effect transistor F8 grid circuit (see Fig. 3)
Resistance R5 replaces to the perseverance being made up of resistance R17, Zener diode D18, audion T19 and resistance R20
Stream source, and between an input arm and 220 volts of civil powers of bridge heap Br1, concatenate a reduction bridge heap input
The electric capacity C21 of voltage.The most not only can improve this electric power outputting current regulation, also make this power supply output electricity
Pressure is easily reduced the lowest, even output short-circuit also will not damaged circuit, with meet technology require high and
Relatively low the loading such as the requirement of light fixture etc. of supply voltage.
Operation principle of the present utility model is as follows:
220 volts of civil powers are transformed into VD V+ in current rectifying and wave filtering circuit, and its typically value is about
310 volts, through the drain electrode of inductance L3 input to field effect transistor F8.When just powering up, electric capacity C14 is uncharged,
The base stage of pressure-wire V4 and audion T11 all with the emitter stage isoelectric level of audion T11, audion T11
Cut-off, after power because of the constant current of constant-current source and to make the voltage of pressure-wire V1 be increased to Zener diode D9's
Voltage stabilizing value (we elect 15 volts as), field effect transistor F8 turns on, and electric current is from the drain electrode stream of field effect transistor F8
To its source electrode, on the one hand making electric capacity C14 start to charge up and voltage gradually rises, this electric current of another aspect is also through electricity
Resistance R13 flows to outfan OUT, and this voltage gradually risen makes voltage the quickest further through resistance R12
The base voltage of the audion T11 of sense gradually rises, and makes audion T11 turn on soon, and makes electricity
Line ball V1 is reduced to the source voltage close to field effect transistor F8, makes field effect transistor F8 end, V4 pressure-wire
And the voltage of audion T11 base stage begins to decline so that the voltage of V1 pressure-wire starts to raise, so that
Field effect transistor F8 can be made again to begin to turn on.The voltage set up when the electric current flowing through resistance R13 is increased to three
During bias value (about 0.7 volt) of pole pipe T11 base stage, this audion begins to turn on.Thus form periodically
Conducting with cut-off oscillatory process.Another aspect, is stored in the electric charge on electric capacity C14 and also flows out through resistance R13
To OUT outfan, filter through electric capacity C15, it is provided that electricity needed for illuminating to load such as LED lamp D16
Stream.Electric capacity C10 plays positive feedback effect, to accelerate the switching process of vibration.Here, resistance R13 is changed
Resistance, it is possible to change this electric power outputting current size.This resistance R13 also can draw with two wires
Connect a manual adjusting resistance value of variable resistance to outside or additional circuit adjusting resistance value is big to change electric current
Little, thus realize light modulation.If using a mechanical switch or electronic circuit to make external resistance R13 realize disconnecting
With Guan Bi, outside enable the most also can be realized.
The pressure reduction of this two voltage of voltage needed for output voltage V+ and LED lamp D16 is by field effect transistor
F8, inductance L3 bear jointly: when field effect transistor F8 turns on, this pressure reduction is substantially held by inductance L3
It is subject to；During scene effect pipe F8 cut-off, this pressure reduction is substantially born by field effect transistor F8, and now inductance L
The energy storage that electric current in 3 produces is reclaimed by inductive energy storage recovery circuit: this power circuit produces and vibrated
Cheng Zhong, produces series of rectangular ripple on pressure-wire V2 and is sent to pressure-wire V3 by electric capacity C6,
Square wave positive half cycle electric capacity C6 charges, and electric capacity C14 is charged and through resistance by charging current through diode D7
R13 flows to outfan OUT；Discharge at square wave negative half period electric capacity C6, discharge current and flow through inductance
Electric current flows to pressure-wire V4 through field effect transistor F8 of conducting, and so, the energy storage in inductance L3 becomes electric energy
It is returned to electric capacity C14 eventually flowing in outfan OUT be utilized, greatly reduces energy loss,
Improve power-efficient.
It is steady that Zener diode D9 is used for that the grid of field effect transistor F8 is clamped at this relative to the voltage of source electrode
The voltage stabilizing value of pressure pipe, to ensure that this field effect transistor will not be damaged because of grid overtension.
Resistance R17, Zener diode D18, audion T19 and the constant-current source of resistance R20 composition, be used for
Replace the load resistance R5 of audion T11, so can improve the current regulation of output.Electric capacity C21 uses
In reducing the AC-input voltage of power supply, being more beneficial for the output voltage of reduction power supply.
The beneficial effects of the utility model are, the current regulation of this power supply is considerably beyond at present with type electricity
The height in source, reach ten thousand/several often lie prostrate even 100,000/several often volts (here, " ten thousand/several often
Volt " the meaning be that electric power output voltage often changes 1 volt, the change relatively of corresponding output electric current is ten thousand/
Several meanings, the rest may be inferred by analogy for it), this is higher than the HP2200PB power supply feature being known as current top level
Going out is not tens percent or several times, but exceeds several magnitude, i.e. ratio HA220XXPB series of power
Superior how.This power-efficient has had been increased to exceed well over the level of efficiency of current Switching Power Supply 90%, warp
Experiment test shows that this power-efficient has reached 98%, and its caloric value is greatly reduced, at practical power device
In can need not fin, the supply unit volume being manufactured into reduces, and required element is little, minimum
Can be to 15, cost substantially reduces, but the power of output has reached 150 watts.The DC voltage of output is
High up to nearly 300 volts, minimum 0 volt i.e. can short circuit and do not damage power supply, also have potential light modulation and
Ena-bung function, solves current LED lamp and drives the practical problem existing for power supply.
Accompanying drawing explanation
Fig. 1 is the basic circuit principle assumption diagram of the efficient high current regulation Unisolated switch power supply of this utility model
Fig. 2 is the utility model circuit diagram that field effect transistor grid circuit load resistance changes on the basis of Fig. 1 constant-current source
Fig. 3 is this utility model circuit diagram being provided with electric capacity on the basis of Fig. 2 in rectifier bridge stack one input arm
Labelling in figure: Br1 is rectifier bridge stack, and C2 is filtering electric capacity, and L3 is inductance, and D4 is diode, R5
For resistance, C6 is electric capacity, and D7 is diode, and F8 is field effect transistor, and D9 is Zener diode, and C10 is
Electric capacity, T11 is audion, and R12 is resistance, and R13 is resistance, and C14 is electric capacity, and C15 is electric capacity,
D16. being light emitting diode D16a, D16b, D16n, belong to power source loads, R17 is resistance, and D18 is
Zener diode, T19 be audion, R20 be resistance, C21 is the electricity being arranged in bridge heap one input arm
Hold.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in detail.
Embodiment 1: a kind of efficient high current regulation Unisolated switch power supply
As shown in Figure 1: a kind of efficient high current regulation Unisolated switch power supply, rectifying and wave-filtering electricity is included
Road, switching power circuit, inductive energy storage recovery circuit and output constant current circuit；Wherein:
A kind of efficient high current regulation Unisolated switch power supply (see Fig. 1), include current rectifying and wave filtering circuit,
Switching power circuit, inductive energy storage recovery circuit and output constant current circuit；Wherein:
Current rectifying and wave filtering circuit is made up of rectifier bridge stack Br1 and electric capacity C2；Wherein, the two of rectifier bridge stack Br1
Individual input connects 220 volts of electric mains, and there is one end ground connection at two ends of its output and other end output voltage
V+, between this output voltage wire V+ and ground wire, tipping has the electric capacity C2 of filtering, constitutes described rectification filter
Wave circuit.
Switching power circuit, by inductance L3, resistance R5, field effect transistor F8, Zener diode D9, electricity
Hold C10, audion T11, resistance R12, resistance R13, electric capacity C14 composition；Wherein, inductance L3
One end is connected with V+ pressure-wire, and its other end is connected with pressure-wire V2, and be connected with pressure-wire V2 also has
One end of electric capacity C10, the drain electrode of field effect transistor F8；The source electrode of field effect transistor F8 is with pressure-wire V4 even
Connecing, pressure-wire V4 is also connected with anode, one end of resistance R12 of Zener diode D9.Electric capacity C10
The other end be connected with the base stage of audion T11 and the other end of resistance R12；The emitter stage of audion T11
Connect outfan OUT pressure-wire；The grid of field effect transistor F8 connect pressure-wire V1, pressure-wire V1 also with
The low-pressure end of resistance R5 and the negative electrode of Zener diode D9 connect.The high-pressure side of resistance R5 and pressure-wire V+
Connect；Resistance R5 is the load resistance of audion T11 colelctor electrode, and the change in voltage of this colelctor electrode passes through phase
Field effect transistor grid even controls the curent change of field effect transistor.
Inductive energy storage recovery circuit is made up of electric capacity C6, diode D4, diode D7；Wherein: electric capacity
One end of C6 is connected with pressure-wire V2, and the other end of electric capacity C6 is connected with V3 pressure-wire, V3 pressure-wire
Also it is connected with negative electrode, the anode of diode D7 of diode D4；The anode of diode D4 is with ground wire even
Connecing, the negative electrode of diode D7 is connected with pressure-wire V4.
Output constant current electrical route resistance R13, electric capacity C14 and electric capacity C15 composition；Wherein: resistance
The high-pressure side of R13, the high-pressure side of electric capacity C14 are connected with pressure-wire V4；The low-pressure end of resistance R13 and electricity
The low-pressure end holding C14 is connected with outfan OUT pressure-wire, outfan OUT also with the high pressure of electric capacity C15
End connects, the low-pressure end ground connection of electric capacity C15.Can external load such as LED between outfan OUT and ground wire
Light fixture D16.
The present embodiment circuit is the simplest, and current regulation can reach one thousandth and often lie prostrate, the highest to requiring
Occasion can meet requirement.
Embodiment 2: field effect transistor grid circuit load is the efficient high current regulation Unisolated switch electricity of constant-current source
Source
As in figure 2 it is shown, the load resistance R5 in field effect transistor F8 grid circuit more can replace to by resistance
R17, Zener diode D18, audion T19 and the constant-current source circuit of resistance R20 composition, wherein three pole
The colelctor electrode of pipe T19 is connected to V1 pressure-wire, and its emitter stage is connected to rectification circuit by resistance R17
In output voltage wire V+, its base stage leads up to resistance R20 ground connection GND, and this base stage is separately leaded up to surely
The anode of pressure diode D17 arrives its negative electrode and is connected in output voltage wire V+ of rectification circuit.So
This electric power outputting current regulation can be improved.
The present embodiment circuit is more complicated, but current regulation is the highest, can reach 5/100000ths and often lie prostrate,
The occasion that requirement is higher can be met.
Embodiment 3: rectifier bridge stack one input arm is provided with the efficient high current regulation Unisolated switch power supply of electric capacity
As it is shown on figure 3, the resistance being not only connected with output voltage wire V+ in field effect transistor F8 grid circuit
R5 replaces to the constant current being made up of resistance R17, Zener diode D18, audion T19 and resistance R20
Source, and between an input arm and 220 volts of civil powers of bridge heap Br1, concatenate a reduction bridge heap input electricity
The electric capacity C21 of pressure.The most not only can improve this electric power outputting current regulation and reach 5/100000ths, also make this
Electric power output voltage is easily reduced the lowest, even output short-circuit also will not damaged circuit, to meet technology
Require relatively low the loading such as the requirement of light fixture etc. of high and supply voltage.
Claims (3)
1. an efficient high current regulation Unisolated switch power supply, it is characterised in that: include rectifying and wave-filtering
Circuit, switching power circuit, inductive energy storage recovery circuit and output constant current circuit；Wherein:
Current rectifying and wave filtering circuit is made up of rectifier bridge stack Br1 and electric capacity C2；Wherein, the two of rectifier bridge stack Br1
Individual input connects 220 volts of electric mains, and there is one end ground connection GND at two ends of its output and other end output
Voltage V+, between this output voltage wire V+ and ground wire, tipping has the electric capacity C2 of filtering, constitutes described whole
Stream filter circuit；
Switching power circuit, by inductance L3, resistance R5, field effect transistor F8, Zener diode D9, electric capacity
C10, audion T11, resistance R12, resistance R13, electric capacity C14 form；Wherein: the one of inductance L3
End is connected with V+ pressure-wire, and its other end is connected with pressure-wire V2, and be connected with pressure-wire V2 also has electricity
Hold one end of C10, the drain electrode of field effect transistor F8；The source electrode of field effect transistor F8 is connected with pressure-wire V4,
Pressure-wire V4 is also connected with anode, one end of resistance R12 of Zener diode D9；Electric capacity C10's is another
One end is connected with the base stage of audion T11 and the other end of resistance R12；The emitter stage of audion T11 connects
Outfan OUT pressure-wire；The grid of field effect transistor F8 connect pressure-wire V1, pressure-wire V1 also with resistance
The low-pressure end of R5 and the negative electrode of Zener diode D9 connect, and the high-pressure side of resistance R5 is with pressure-wire V+ even
Connect；Resistance R5 is the load resistance of audion T11 colelctor electrode, and the change in voltage of this colelctor electrode is by being connected
Field effect transistor grid control the curent change of field effect transistor:
Inductive energy storage recovery circuit is made up of electric capacity C6, diode D4, diode D7；Wherein: electric capacity
One end of C6 is connected with pressure-wire V2, and the other end of electric capacity C6 is connected with V3 pressure-wire, V3 pressure-wire
Also being connected with negative electrode, the anode of diode D7 of diode D4, the anode of diode D4 is with ground wire even
Connecing, the negative electrode of diode D7 is connected with pressure-wire V4；
Output constant current electrical route resistance R13, electric capacity C14 and electric capacity C15 composition, wherein: resistance
The high-pressure side of R13, the high-pressure side of electric capacity C14 are connected with pressure-wire V4, the low-pressure end of resistance R13 and electricity
The low-pressure end holding C14 is connected with outfan OUT pressure-wire, outfan OUT also with the high pressure of electric capacity C15
End connects, the low-pressure end ground connection GND of electric capacity C15.
2., according to the efficient high current regulation Unisolated switch power supply described in claim 1, its feature exists
More can replace to by resistance R17, steady in: the load resistance R5 in described field effect transistor F8 grid circuit
The constant-current source circuit of pressure diode D18, audion T19 and resistance R20 composition, wherein audion T19
Colelctor electrode is connected to V1 pressure-wire, and its emitter stage is connected to the output voltage of rectification circuit by resistance R17
On line V+, its base stage leads up to resistance R20 ground connection GND, and this base stage separately leads up to Zener diode
The anode of D17 arrives its negative electrode and is connected in output voltage wire V+ of rectification circuit.
3., according to the efficient high current regulation Unisolated switch power supply described in claim 2, its feature exists
In: also can concatenate a reduction bridge heap input between Qi Qiaodui Br1 a input arm with 220 volts of civil powers
The electric capacity C21 of voltage, the most not only can improve this electric power outputting current regulation, also makes this power supply output electricity
Pressure is easily reduced the lowest, and even output short-circuit also will not damaged circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620017282.0U CN205544988U (en) | 2016-01-11 | 2016-01-11 | Non - isolator power of high -efficient high current regulation |
| CN201620017282.0 | 2016-01-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544989U true CN205544989U (en) | 2016-08-31 |
Family
ID=56764501
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620017282.0U Expired - Fee Related CN205544988U (en) | 2016-01-11 | 2016-01-11 | Non - isolator power of high -efficient high current regulation |
| CN201620125161.8U Expired - Fee Related CN205544989U (en) | 2016-01-11 | 2016-02-18 | Non - isolator power of high -efficient high current regulation |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620017282.0U Expired - Fee Related CN205544988U (en) | 2016-01-11 | 2016-01-11 | Non - isolator power of high -efficient high current regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN205544988U (en) |
-
2016
- 2016-01-11 CN CN201620017282.0U patent/CN205544988U/en not_active Expired - Fee Related
- 2016-02-18 CN CN201620125161.8U patent/CN205544989U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN205544988U (en) | 2016-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2496056B1 (en) | Constant-current-drive led module device | |
| WO2010122403A1 (en) | Apparatus and methods of operation of passive led lighting equipment | |
| CN101527983B (en) | White-light LED illumination driving circuit on basis of current-type charge pump | |
| CN103152913B (en) | Alternating current rectifying circuit and alternating current rectifying method for driving light-emitting diode (LED) module | |
| CN103546027A (en) | Power supply, solid-state light-emitting element lighting device, and luminaire | |
| CN102404904B (en) | Control device of solar street lamp | |
| CN105792421B (en) | A kind of no bridge type LED drive power | |
| CN104507227A (en) | Transformer-free constant current power circuit | |
| CN107736080A (en) | Light modulating device | |
| CN102159001A (en) | Lamp tube circuit of luminous component | |
| CN203608412U (en) | An LED lamp driving power supply employing optical coupler feedback control | |
| CN107734778A (en) | LED drive power circuit and luminaire | |
| CN205544989U (en) | Non - isolator power of high -efficient high current regulation | |
| CN208489796U (en) | The luminescent system and microscope of a kind of adjustable constant-flow source adapter, tabilized current power supply | |
| CN203734880U (en) | High voltage integration AC LED multistage linear drive device | |
| CN104582115B (en) | Light-emitting device | |
| CN105915086B (en) | High-efficiency AC/D/C power circuit and its control method and method of supplying power to | |
| CN102752895B (en) | Capacitance voltage-reduction LED (light emitting diode) lighting device with constant current, constant voltage and protection functions | |
| CN103313461B (en) | Replaceable electronic ballast lamp tube | |
| CN105471293A (en) | Non-isolating switching power supply with high efficiency and high current regulation ratio | |
| CN205071365U (en) | Emitting diode lighting drive circuit and lamps and lanterns | |
| CN202696996U (en) | Efficient non-isolated switching power supply | |
| CN207589243U (en) | A kind of three lamp drive circuits based on RCC | |
| CN203537623U (en) | LED driving power supply | |
| CN206559675U (en) | A kind of LED dimming driving circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20180218 |