CN207166826U - A kind of high-power LED driving power source circuit - Google Patents
A kind of high-power LED driving power source circuit Download PDFInfo
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- CN207166826U CN207166826U CN201721001769.0U CN201721001769U CN207166826U CN 207166826 U CN207166826 U CN 207166826U CN 201721001769 U CN201721001769 U CN 201721001769U CN 207166826 U CN207166826 U CN 207166826U
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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
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses a kind of high-power LED driving power source circuit, it is related to LED power technical field.Including filter circuit, boost types pfc circuit, half-bridge LCC resonance circuits and LED string group, the filter circuit is made up of inductance L1 and electric capacity C1, the boost types pfc circuit is made up of inductance L2, power switch tube S 1,2 and diode D1, D2, and the half-bridge LCC resonance circuits are made up of inductance L3, electric capacity C3, C4, C5 and high frequency transformer T1.The driving power circuit is input to the exchange output of needs from exchange, it is only necessary to one-level, reduces the cost of LED illumination driving power, improves efficiency and reliability.
Description
Technical field
It the utility model is related to LED power technical field, more particularly to a kind of high-power LED driving power source circuit.
Background technology
The design of current high-power constant current LED driving power source, relatively common soft switch topology are LLC, LLC topologys it is defeated
It is all higher to go out voltage, current range lower limit.As user is special to the more and more higher of requirement of light regulation, this output of LLC topologys
The limitation of property is also more and more obvious.If exporting voltage of the direct constant current LLC topologys in constant current can not reach very low, i.e.,
Have the adaptability of lamp bead number compared with big limitation；When being dimmed when needing specific lamp string relatively-stationary to voltage
Wait, light modulation electric current can not reach than relatively low scope in the frequency range of relative narrower.Accomplish deep light modulation depth if desired,
Discontinuous operation is generally required to reach small average current, or even is realized using extra one-level DC/DC electric currents, is produced extra
Ripple current or increase system cost and reduction efficiency.
With the continuous development in LED markets, also more and more higher, high-power LED illumination drive the requirement to its driving power
Device includes PFC and DC/DC converters.At present, commonly use two-stage AC/DC drive circuits, circuit structure and control it is complicated, costly,
Efficiency is low.
In addition, existing AC LED lamp circuits structure has cascaded structure, trapezium structure and bridge architecture, in AC LED circuit knots
In structure, when it is line voltage 220V, 50Hz to input AC sources, if not series limiting resistor, a large amount of LED series connection are needed to limit
LED current processed, now increasing total cut-in voltage causes power factor very low, when series limiting resistor, then needs to connect
LED quantity reduce, power factor increases, but because current-limiting resistance will cause efficiency to reduce, moreover, working as LED operation
When frequency is 50Hz, light source will substantially produce scintillation.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of high-power LED driving power source circuit, circuit structure
Simply, it is easy to control, high conversion efficiency.
In order to solve the above technical problems, technical solution adopted in the utility model is：A kind of high-power LED driving power source
Circuit, including filter circuit, boost types pfc circuit, half-bridge LCC resonance circuits and LED string group, the filter circuit is by electricity
Feel L1 and electric capacity C1 compositions, the boost types pfc circuit is made up of inductance L2, power switch tube S 1,2 and diode D1, D2,
The half-bridge LCC resonance circuits are made up of inductance L3, electric capacity C3, C4, C5 and high frequency transformer T1, the filtered circuit of 220V civil powers
It is sent to boost types pfc circuit after filtering to carry out rectification and obtain high power factor, the electric signal after processing is through half-bridge LCC
Resonance circuit is sent to LED string group, the group work of driving LED string after carrying out pressure regulation.
The technical scheme further optimized is that the live wire L ends that physical circuit is 220V civil powers are followed by two through inductance L1, L2
Branch road, a branch road are connected through diode D1 one end in parallel with power switch tube S 1 and diode D3, and another branch road is through two poles
One end in parallel with power switch tube S 2 and diode D4 pipe D2 is connected, the other end of power switch tube S 2 and diode D4 parallel connections
The Node connectedness in parallel with power switch tube S 1 and diode D3, it is another between electric capacity C1 mono- terminates inductance L1 and inductance L2
Terminate 220V civil powers zero line N-terminal, the terminating diode D1 of electric capacity C2 mono- one end in parallel with power switch tube S 1 and diode D3 it
Between node, other end ground connection, electric capacity C3 is connected in parallel on electric capacity C2 both ends, high frequency transformer T1 two inputs after being concatenated with electric capacity C4
End, after one end is in parallel with power switch tube S 1 and diode D3 after inductance L3 connects power switch tube S 2 and diode D4 parallel connections it
Between node, the node between another termination capacitor C3 and electric capacity C4, its two output end connects LD lamp string groups respectively, and electric capacity C5 simultaneously connects
In high frequency transformer T1 two output ends.
The technical scheme further optimized is that the LED string group is two groups of LED string inverse parallel connection compositions.
It is using beneficial effect caused by above-mentioned technical proposal：The utility model is by traditional prime Boost PFC
With rear class half-bridge LCC resonance circuits by sharing power switch pipe, integrate, introduce non-bridge PFC technology, form no bridge
PFC single-stage AC LED drive power circuits, the driving power circuit are input to the exchange output of needs from exchange, it is only necessary to one
Level, reduces the cost of LED illumination driving power, improves efficiency and reliability.The circuit also has simple in construction, controlling party
Just, there is PFC functions, output high-frequency signal driving AC LED solve LED stroboscopic problems.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 is the utility model circuit theory diagrams.
Embodiment
With reference to the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Many details are elaborated in the following description in order to fully understand the utility model, but this practicality is new
Type can also be different from other manner described here using other to be implemented, and those skilled in the art can be without prejudice to this reality
With doing similar popularization in the case of new intension, therefore the utility model is not limited by following public specific embodiment.
As shown in figure 1, the utility model discloses a kind of high-power LED driving power source circuit, including filter circuit,
Boost types pfc circuit, half-bridge LCC resonance circuits and LED string group, the filter circuit are made up of inductance L1 and electric capacity C1, institute
State boost types pfc circuit to be made up of inductance L2, power switch tube S 1,2 and diode D1, D2, the half-bridge LCC resonance circuits
It is made up of inductance L3, electric capacity C3, C4, C5 and high frequency transformer T1, boost types is sent to after the filtered circuit filtering of 220V civil powers
Pfc circuit carries out rectification and obtains high power factor, and the electric signal after processing passes after half-bridge LCC resonance circuits carry out pressure regulation
Deliver to LED string group, the group work of driving LED string.
The technical scheme further optimized is that the live wire L ends that physical circuit is 220V civil powers are followed by two through inductance L1, L2
Branch road, a branch road are connected through diode D1 one end in parallel with power switch tube S 1 and diode D3, and another branch road is through two poles
One end in parallel with power switch tube S 2 and diode D4 pipe D2 is connected, the other end of power switch tube S 2 and diode D4 parallel connections
The Node connectedness in parallel with power switch tube S 1 and diode D3, it is another between electric capacity C1 mono- terminates inductance L1 and inductance L2
Terminate 220V civil powers zero line N-terminal, the terminating diode D1 of electric capacity C2 mono- one end in parallel with power switch tube S 1 and diode D3 it
Between node, other end ground connection, electric capacity C3 is connected in parallel on electric capacity C2 both ends, high frequency transformer T1 two inputs after being concatenated with electric capacity C4
End, after one end is in parallel with power switch tube S 1 and diode D3 after inductance L3 connects power switch tube S 2 and diode D4 parallel connections it
Between node, the node between another termination capacitor C3 and electric capacity C4, its two output end connects LD lamp string groups respectively, and electric capacity C5 simultaneously connects
In high frequency transformer T1 two output ends.The complementary conducting of power switch tube S 1, S2 and diode D1, D2, is not turned on pressure drop
And reverse recovery time, while electric capacity C2 contains tributary voltage, and carried with power switch tube S 1, S2 composition high frequency square wave inverters
Half-bridge LCC resonance circuits are given for high high frequency square wave voltage, power switch tube S 1, S2 are alternately led with the dutycycle for being fixed as 50%
Logical, generations amplitude is V, and valley is 0 square wave, loads on resonant network, and in resonance circuit, electric capacity not only acts as the work of resonance
With, while can also play a part of isolating tributary, center voltage V/2, can effectively solve magnetic circuit energy imbalance, LCC
Resonant tank is in perception, you can to realize zero voltage switching.Half LLC resonance circuits can realize power switch in full-load range
The no-voltage of pipe opens the zero-current switching (ZCS) of (ZVS) and commutation diode, reduces switching loss with this.
The technical scheme further optimized is that the LED string group is two groups of LED string inverse parallel connection compositions, is realized big
Power LED lamp group.
The utility model is by traditional prime Boost PFC and rear class half-bridge LCC resonance circuits by sharing power switch
Pipe, is integrated, and introduces non-bridge PFC technology, forms the single-stage AC LED drive power circuits of non-bridge PFC, the driving power
Circuit is input to the exchange output of needs from exchange, it is only necessary to one-level, reduces the cost of LED illumination driving power, improves effect
Rate and reliability.The circuit also has simple in construction, easy to control, has a PFC functions, output high-frequency signal driving AC LED are solved
Determine LED stroboscopic problems.
Claims (3)
- A kind of 1. high-power LED driving power source circuit, it is characterised in that：Including filter circuit, boost types pfc circuit, half-bridge LCC resonance circuits and LED string group, the filter circuit are made up of inductance L1 and electric capacity C1, the boost types pfc circuit by Inductance L2, power switch tube S 1,2 and diode D1, D2 composition, the half-bridge LCC resonance circuits by inductance L3, electric capacity C3, C4, C5 and high frequency transformer T1 is formed, and boost types pfc circuit is sent to after the filtered circuit filtering of 220V civil powers and carries out rectification and obtains High power factor is taken, the electric signal after processing is sent to LED string group after half-bridge LCC resonance circuits carry out pressure regulation, drives LED string group works.
- A kind of 2. high-power LED driving power source circuit according to claim 1, it is characterised in that：Physical circuit is 220V The live wire L ends of civil power are followed by two branch roads through inductance L1, L2, and a branch road is through diode D1 and power switch tube S 1 and diode One end connection in parallel D3, another branch road are connected through diode D2 one end in parallel with power switch tube S 2 and diode D4, work( The other end in parallel rate switching tube S2 and diode D4 Node connectedness in parallel with power switch tube S 1 and diode D3, electric capacity C1 Between one termination inductance L1 and inductance L2, the zero line N-terminal of another termination 220V civil powers, the terminating diode D1 of electric capacity C2 mono- and work( Node between rate switching tube S1 and diode D3 parallel connections one end, other end ground connection, electric capacity C3 are connected in parallel on after being concatenated with electric capacity C4 Electric capacity C2 both ends, high frequency transformer T1 two inputs, one end is after inductance L3 connects power switch tube S 2 and diode D4 parallel connections Node between after in parallel with power switch tube S 1 and diode D3, the node between another termination capacitor C3 and electric capacity C4, its Two output ends connect LD lamp string groups respectively, and electric capacity C5 is attempted by high frequency transformer T1 two output ends.
- A kind of 3. high-power LED driving power source circuit according to claim 1, it is characterised in that：The LED string group is Two groups of LED string inverse parallel connection compositions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721001769.0U CN207166826U (en) | 2017-08-11 | 2017-08-11 | A kind of high-power LED driving power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721001769.0U CN207166826U (en) | 2017-08-11 | 2017-08-11 | A kind of high-power LED driving power source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207166826U true CN207166826U (en) | 2018-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721001769.0U Expired - Fee Related CN207166826U (en) | 2017-08-11 | 2017-08-11 | A kind of high-power LED driving power source circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN207166826U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114222393A (en) * | 2021-11-23 | 2022-03-22 | 北京机械设备研究所 | LED lamp drive circuit and LED lighting device |
-
2017
- 2017-08-11 CN CN201721001769.0U patent/CN207166826U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114222393A (en) * | 2021-11-23 | 2022-03-22 | 北京机械设备研究所 | LED lamp drive circuit and LED lighting device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180330 Termination date: 20210811 |
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| CF01 | Termination of patent right due to non-payment of annual fee |