CN201813590U - Driving power supply of light-emitting diode - Google Patents
Driving power supply of light-emitting diode Download PDFInfo
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- CN201813590U CN201813590U CN2010202119332U CN201020211933U CN201813590U CN 201813590 U CN201813590 U CN 201813590U CN 2010202119332 U CN2010202119332 U CN 2010202119332U CN 201020211933 U CN201020211933 U CN 201020211933U CN 201813590 U CN201813590 U CN 201813590U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a driving power supply of a light-emitting diode, comprising a PFC (Power Factor Correction) module, an LLC (Logical Link Control) module and at least one path of constant BUCK module, wherein the PFC module is used for receiving inputted alternating-current voltage and outputting stable direct-current bus voltage after carrying out filtering, rectification and power factor correction on the inputted alternating-current voltage; the LLC module is used for carrying out voltage reduction and isolation on the direct-current bus voltage and outputting constant low voltage lower than the direct-current bus voltage; and the BUCK module is used for transforming the constant low voltage into constant current and outputting the constant current to an LED (light-emitting diode) light source module. Due to adoption of the driving power supply, multiple paths of constant current output for driving the LED light source module are provided.
Description
Technical field
The utility model relates to the led technology field, particularly relates to a kind of driving power of light-emitting diode.
Background technology
Current China electric power energy is comparatively nervous, and the coal resources storage is limited, and a lot of areas are easy to occur the short phenomenon of powering in peak times of power consumption.Electric consumption on lighting accounts for 20% of China's power consumption, therefore carries out the saving that energy conservation can realize electric power resource effectively aspect electric consumption on lighting.
LED (Light Emitting Diode, light-emitting diode) is a kind of semiconductor device that can directly be converted into electricity visible light.LED is applied to the demonstration of indicator light, numeral and literal the earliest.Along with the appearance of White LED, to have operating voltage low for LED in addition.Little power consumption, luminous efficiency height, long advantage of life-span, led light source obtains application more and more widely in the general illumination field.Led light source is the luminescent device of a kind of not only energy-conservation but also environmental protection, compares with conventional light source, and the LED lamp is than incandescent lamp power saving 80%, than fluorescent lamp power saving 50%.
For the high-power LED light fixture, generally form by the cascade of a plurality of lower powered led light source module.The LED light fixture that this cascade forms needs driving power to realize constant-current driving.
With reference to Fig. 1, be the driving power structure chart of the light-emitting diode of prior art.Driving power shown in Figure 1 is made up of two-stage circuit: the first order is PFC (Power Factor Correction, power factor correction) module 10a, is used to carry out power factor correction and a stable DC 400V busbar voltage is provided; The second level is DC/DC constant voltage circuit 20a, is used for the DC 400V busbar voltage of input is carried out step-down the 115V constant voltage that output led light source module 30a needs.
The described driving power of prior art can only provide the output of one road 115V constant voltage.Drive the LED light fixture that the LED multi-path light source module is formed if desired, need in parallel or series connection with the LED multi-path light source module.
When adopting the LED multi-path light source module to be connected in series,, will cause the whole LED light fixture to lose efficacy if one of them led light source module opens circuit.
When adopting the LED multi-path light source module to be connected in parallel, because the consistency of voltage-to-current (V-I) characteristic of LED is bad, so can't guarantee each led light source inside modules current-sharing, make that the aging speed of each LED module is inconsistent, influence the bulk life time of LED light fixture.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of driving power of light-emitting diode, the constant current output that can provide multichannel to be used for the driven for emitting lights diode light source module.
The utility model embodiment provides a kind of driving power of light-emitting diode, and described driving power comprises: PFC module, LLC module, at least one road constant current BUCK module;
Described PFC module is used to receive input ac voltage, and to after described input ac voltage filtering, rectification, reaching power factor correction, exports stable DC bus-bar voltage;
Described LLC module is used for described DC bus-bar voltage step-down and isolation, and output is lower than the constant low pressure of described DC bus-bar voltage;
Described constant current BUCK module is used for described constant voltage is converted into constant current, exports a paths of LEDs light source module to.
Preferably, described PFC module comprises: electromagnetic interface filter, rectifier bridge, PFC correcting circuit;
Described electromagnetic interface filter is used for the input ac voltage that receives is carried out High frequency filter;
Described rectifier bridge is used for filtered input ac voltage is carried out rectification, and the output all-wave is to the PFC correcting circuit;
Described PFC correcting circuit is used for the all-wave that receives is carried out power factor correction, exports stable DC bus-bar voltage.
Preferably, described LLC module is soft switch DC-DC isolated buck circuit.
Preferably, described constant current BUCK module adopts L6562 as control chip.
Preferably, described constant current BUCK module adopts the D-S switching signal of capacitive coupling, metal-oxide-semiconductor to serve as the PFM critical conduction mode circuit of zero crossing detection signal.
Preferably, described constant current BUCK module comprises: first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, inductance, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, first diode, second diode, metal-oxide-semiconductor;
The negative electrode of one termination, first diode of described second electric capacity, another termination inductance of second electric capacity; Another termination the 3rd electric capacity of described inductance, the drain electrode of metal-oxide-semiconductor, the anode of first diode; The other end of described the 3rd electric capacity is connected in series first resistance successively and the 4th resistance arrives ground; The grid of described metal-oxide-semiconductor connects second resistance, the 3rd resistance, the source electrode resistance grounded of metal-oxide-semiconductor; The anode of another termination second diode of described the 3rd resistance; The GD pin of another chip termination L6562 of the negative electrode of described second diode and described second resistance; The ZCD pin of the public chip termination L6562 of described first resistance and the 4th resistance; Described first electric capacity two terminates between the negative electrode and ground of first diode; The source electrode of described metal-oxide-semiconductor is through the 5th resistance and the 4th capacity earth.
Preferably, the peripheral circuit of described chip L6562 comprises: the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity;
The INV pin of described chip L6562 is through the 6th grounding through resistance; The COMP pin is through the 8th resistance and the 6th grounding through resistance; Described the 7th resistance and the 6th electric capacity and be connected in the INV pin and the COMP pin between; The CS pin is through the 4th capacity earth; The MULT pin is through the 7th capacity earth, and described the tenth resistance and the 11 resistance also are connected in described the 7th electric capacity two ends; Described the 9th resistance and be connected in the COMP pin and the MULT pin between; The VCC pin connects working power and the 5th electric capacity, the other end ground connection of described the 5th electric capacity; GND pin ground connection
According to the specific embodiment that the utility model provides, the utility model discloses following technique effect:
In the described driving power of the utility model embodiment, adopt three grades of circuit to constitute, its second level is that the output of LLC module can connect at least one road constant current BUCK module, and every road constant current BUCK module is used to drive a paths of LEDs light source module.Realize the constant current output that the described driving power of the utility model embodiment can provide multichannel to be used for the driving LED light source module thus, driven the LED multi-path light source module simultaneously.
Description of drawings
Fig. 1 is the driving power structure chart of the light-emitting diode of prior art;
The driving power structure chart of the light-emitting diode that Fig. 2 provides for the utility model embodiment;
The PFC modular structure figure that Fig. 3 provides for the utility model embodiment;
The constant current BUCK module circuit diagram that Fig. 4 provides for the utility model embodiment.
Embodiment
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
In view of this, the purpose of this utility model is to provide a kind of driving power of light-emitting diode, the constant current output that can provide multichannel to be used for the driven for emitting lights diode light source module.
With reference to Fig. 2, the driving power structure chart of the light-emitting diode that provides for the utility model embodiment.Driving power shown in Figure 2 comprises three grades of circuit compositions:
The first order is a PFC module 10, is used to receive input ac voltage, and described input ac voltage is carried out filtering, rectification, reaches power factor correction, exports stable DC bus-bar voltage to LLC module 20;
The second level is LLC (controlled resonant converter) module 20, is used for the DC bus-bar voltage of input is carried out step-down, and output is lower than the constant low pressure of described DC bus-bar voltage, is sent to constant current BUCK (buck translation circuit) module 30; Simultaneously, described LLC module 20 also plays the effect of isolation, is used to realize the hot side (DC bus-bar voltage) of driving power and the isolation between the step-down side (constant low pressure).
The third level is at least one road constant current BUCK module 30, and the described constant low pressure that is used for receiving is converted into the required constant current of driving LED light source module 40 work, exports a paths of LEDs light source module 40 to.
In the described driving power of the utility model embodiment, adopt three grades of circuit to constitute, its second level is LLC module 20, and its output can connect at least one road constant current BUCK module 30, and every road constant current BUCK module 30 is used to drive a paths of LEDs light source module 40.Realize the constant current output that the described driving power of the utility model embodiment can provide multichannel to be used for driving LED light source module 40 thus, driven LED multi-path light source module 40 simultaneously.
Among the utility model embodiment, described PFC module 10 receives input ac voltage, and described input ac voltage is carried out filtering, rectification, power factor correction, exports stable DC bus-bar voltage.
As shown in Figure 3, the PFC modular structure figure that provides for the utility model embodiment.Described PFC module 10 shown in Figure 3 can comprise: EMI (Electromagnetic Interference, electromagnetic interference) filter 101, rectifier bridge 102, PFC correcting circuit 103.
Wherein, described electromagnetic interface filter 101 is used for the input ac voltage that receives is carried out High frequency filter.The high frequency clutter of described electromagnetic interface filter 101 in can the filtering input ac voltage suppresses High-frequency Interference in the AC network to the influence of equipment, simultaneously also suppression equipment to the interference of AC network.
102 pairs of described rectifier bridges have passed through electromagnetic interface filter 101 filtered input ac voltages and have carried out rectification, and the output all-wave is to PFC correcting circuit 103.
103 pairs of all-waves that receive of described PFC correcting circuit are carried out power factor correction, export stable DC bus-bar voltage.Described PFC correcting circuit 103 can improve the power factor of described driving power, saves reactive power loss, some problems of avoiding the 3rd order harmonics electric current in the AC network to cause.Concrete, generally there is not the driving power of PFC correcting circuit, its power factor is about 0.5-0.7, its power factor of driving power of band PFC correcting circuit can reach more than 0.99.
Among the utility model embodiment, described input ac voltage generally can be AC85V～264V.Span with above-mentioned input ac voltage is that example is described in detail below, but the described driving power of the utility model embodiment, its input ac voltage is not limited to above-mentioned span.
After filtering, rectification and the power factor correction of described input ac voltage through PFC module 10, the DC bus-bar voltage of output is generally 380V～400V.This narrow input voltage range helps the employing of second level circuit in the described driving power (LLC module 20) greatly.
Described LLC module 20 is carried out step-down to the DC bus-bar voltage of 380V～400V of input, and the constant low pressure of output 115V can be used to drive the led light source module 40 that multichannel is nominally DC 0V～DC 92V/350 MA.Among Fig. 2 that the utility model embodiment provides, be that example describes with 6 paths of LEDs light source modules 40, but among other embodiment of the utility model, described driving power can drive LED multi-path light source module 40, its concrete way can specifically be set according to actual conditions.
Described constant current BUCK module 30 is converted into the 350MA constant current with the constant low pressure of the 115V that receives, driving LED light source module 40.
As shown in Figure 2, the tertiary circuit of described driving power comprises 6 tunnel constant current BUCK modules 30, every road constant current BUCK module 30 is used to drive a paths of LEDs light source module 40, has realized the constant current output that the described driving power of present embodiment can provide multichannel to be used for driving LED light source module 40 thus.
Need to prove that among the utility model embodiment, described LLC module 20 adopts soft switch DC-DC isolated buck circuit.The mature technology that PFC module 10 that the utility model adopts and LLC module 20 are this area is not done detailed description at this.The constant current BUCK module 30 that the utility model embodiment is adopted describes in detail below.
With reference to Fig. 4, the constant current BUCK module circuit diagram that provides for the utility model embodiment.Constant current BUCK module 30 shown in Figure 4 adopts L6562 as control chip.Constant current BUCK module 30 shown in Figure 4, it is connected with mainboard by connector JP1.Described connector JP1 comprises 8 pins, and wherein: pin one connects+15V, is chip L6562 power supply; Pin two and 3 ground connection; Pin 4 and 5 connects the positive input terminal of led light source module; Pin 6 and 7 connects the negative input end of led light source module; Pin 8 is unsettled.
As shown in Figure 4, described chip L6562 has 8 pins, and the function of each pin is as described below respectively: pin one (INV pin) is the inverting input and the output voltage overvoltage protection input of voltage error amplifier; Pin two (COMP pin) is the output of voltage error amplifier and an input of chip internal multiplier; Pin 3 (MULT pin) is another input of chip internal multiplier; Pin 4 (CS pin) is chip peak current sampling input; Pin 5 (ZCD pin) is inductance L 501 current zero-crossing point test sides; Pin 6 (GND pin) is chip ground, and all signals of chip are reference with this pin all; Pin 7 (GD pin) is the drive signal output pin of metal-oxide-semiconductor Q301, connects the grid of metal-oxide-semiconductor Q301; For avoiding the drive signal vibration of Q301, connecting resistance R301 between the grid of GD pin and Q301; Pin 8 (VCC pin) is the power pin of chip, is used to connect start-up circuit and power circuit.
Concrete, the described constant current BUCK of the utility model embodiment module 30 comprises: first capacitor C 210, second capacitor C 301, the 3rd capacitor C 103, the 4th capacitor C 309, inductance L 501, first resistance R 311, second resistance R 301, the 3rd resistance R 302, the 4th resistance R 312, the 5th resistance R 305, the first diode D301, the second diode D302, metal-oxide-semiconductor Q301.
The negative electrode of one termination, the first diode D301 of described second capacitor C 301, another termination inductance L 501 of second capacitor C 301; Another termination the 3rd capacitor C 103 of described inductance L 501, the drain electrode of metal-oxide-semiconductor Q301, the anode of the first diode D301; The other end of described the 3rd capacitor C 103 is connected in series first resistance R 311 successively and the 4th resistance R 312 arrives ground; The grid of described metal-oxide-semiconductor Q301 connects second resistance R 301, the 3rd resistance R 302, and the source electrode of metal-oxide-semiconductor Q301 is through resistance R S301 ground connection; The anode of another termination second diode D302 of described the 3rd resistance R 302; The pin 7 (GD pin) of another chip termination L6562 of the negative electrode of the described second diode D302 and described second resistance R 301; The pin 5 (ZCD pin) of the public chip termination L6562 of described first resistance R 311 and the 4th resistance R 312; 210 liang of described first capacitor C terminate between the negative electrode and ground of the first diode D301; The source electrode of described metal-oxide-semiconductor Q301 is through the 5th resistance R 305 and the 4th capacitor C 309 ground connection.
The peripheral circuit of described chip L6562 comprises: the 6th resistance R 303, the 7th resistance R 304, the 8th resistance R 3041, the 9th resistance R 309, the tenth resistance R the 3101, the 11 resistance R 310, the 5th capacitor C 311, the 6th capacitor C 308, the 7th capacitor C 306.
The pin one of described chip L6562 (INV pin) is through the 6th resistance R 303 ground connection; Pin two (COMP pin) is through the 8th resistance R 3041 and the 6th resistance R 303 ground connection; Described the 7th resistance R 304 and the 6th capacitor C 308 and be connected in pin one (INV pin) and pin two (COMP pin) between; Pin 4 (CS pin) is through the 4th capacitor C 309 ground connection; Pin 3 (MULT pin) is through the 7th capacitor C 306 ground connection, and described the tenth resistance R 3101 and the 11 resistance R 310 also are connected in described the 7th capacitor C 306 two ends; Described the 9th resistance R 309 and be connected in pin two (COMP pin) and pin 3 (MULT pin) between; Pin 8 (VCC pin) connects working power and the 5th capacitor C 311, the other end ground connection of described the 5th capacitor C 311; Pin 6 (GND pin) ground connection.
In the described constant current BUCK of the utility model embodiment module 30, adopt the capacitive coupling inductive current to detect the PFM critical conduction mode circuit of zero crossing electric current.Its operation principle is as described below:
As shown in Figure 4, start constant current BUCK module, chip L6562 power supply is normal, driven MOS pipe Q301 conducting.
When metal-oxide-semiconductor Q301 conducting, the electric current of inductance L 501 is flowed through metal-oxide-semiconductor Q301 from right to left to ground, progressively increases, and when electric current reached the maximum of setting, described metal-oxide-semiconductor Q301 turn-offed.Metal-oxide-semiconductor Q301 closes and has no progeny, inductance L 501 afterflows, electric current progressively reduces from right to left, this moment, the electric current of inductance L 501 had two branch roads, one the tunnel is to reach direct current positive bus by diode D301, and the pin 5 (ZCD pin) that capacitor C 103 and resistance R 311 be coupled to chip L6562 of leading up to forms high level.When electric current on the inductance L 501 was reduced to zero, 5 pin of chip L6562 (ZCD pin) became low level by high level, and trailing edge produces, and made the driving output hopping of chip L6562, metal-oxide-semiconductor Q301 conducting once more.Under the critical conduction mode, LED output average current equals half of inductance L 501 peak currents, and its peak current can be by determining the product of voltage and the voltage that the last surface sample of resistance R S301 obtains on the pin two (COMP) of chip L6562 and the pin 3 (MULT).In the existing PFM modulation constant current BUCK module that adopts usually, the general main inductance that adopts adds ancillary coil as energy-storage travelling wave tube, the way of similar high frequency transformer, the pin ZCD of described L6562 chip connects the secondary winding of transformer by resistance, realizes thus the current zero-crossing point of transformer is detected.But, when practical application, different constant current BUCK modules, the actual parameter of the transformer that it needs is inequality.Therefore, in the existing constant current BUCK module, the parameter of its transformer needs design separately, special customization, causes its circuit cost higher and be unfavorable for promoting, and universality is relatively poor.
Concrete, as shown in Figure 4, among the utility model embodiment, adopt inductance L 501 to replace traditional transformer device structure, simultaneously, adopt the mode of capacitor C 103 couplings, omitted the secondary winding of traditional transformer.As shown in Figure 4, the pin ZCD of described L6562 chip receives on the inductance L 501 by resistance R 311 and capacitor C 103, has simplified circuit structure thus.Simultaneously, for different constant current BUCK modules, only need the concrete parameter of the suitable inductance L 501 of design, resistance R 311, capacitor C 103 to get final product.And above-mentioned three kinds of components and parts all are the conventional devices on the market, are easy to satisfy its specification demand, can reduce the circuit cost, are easy to again realize.
Other circuit structures of constant current BUCK module shown in Figure 4 (L6562 chip and peripheral circuit connection thereof etc.) are the conventional connection of the circuit of existing BUCK module, do not do at this and give unnecessary details.
More than to the driving power of a kind of light-emitting diode provided by the utility model, be described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, part in specific embodiments and applications all can change.In sum, this description should not be construed as restriction of the present utility model.
Claims (7)
1. the driving power of a light-emitting diode is characterized in that, described driving power comprises: PFC module, LLC module, at least one road constant current BUCK module;
Described PFC module is used to receive input ac voltage, and to after described input ac voltage filtering, rectification, reaching power factor correction, exports stable DC bus-bar voltage;
Described LLC module is used for described DC bus-bar voltage step-down and isolation, and output is lower than the constant low pressure of described DC bus-bar voltage;
Described constant current BUCK module is used for described constant voltage is converted into constant current, exports a paths of LEDs light source module to.
2. the driving power of light-emitting diode according to claim 1 is characterized in that, described PFC module comprises: electromagnetic interface filter, rectifier bridge, PFC correcting circuit;
Described electromagnetic interface filter is used for the input ac voltage that receives is carried out High frequency filter;
Described rectifier bridge is used for filtered input ac voltage is carried out rectification, and the output all-wave is to the PFC correcting circuit;
Described PFC correcting circuit is used for the all-wave that receives is carried out power factor correction, exports stable DC bus-bar voltage.
3. the driving power of light-emitting diode according to claim 1 is characterized in that, described LLC module is soft switch DC-DC isolated buck circuit.
4. the driving power of light-emitting diode according to claim 1 is characterized in that, described constant current BUCK module adopts L6562 as control chip.
5. the driving power of light-emitting diode according to claim 4 is characterized in that, described constant current BUCK module adopts the D-S switching signal of capacitive coupling, metal-oxide-semiconductor to serve as the PFM critical conduction mode circuit of zero crossing detection signal.
6. the driving power of light-emitting diode according to claim 5, it is characterized in that described constant current BUCK module comprises: first electric capacity, second electric capacity, the 3rd electric capacity, the 4th electric capacity, inductance, first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, first diode, second diode, metal-oxide-semiconductor;
The negative electrode of one termination, first diode of described second electric capacity, another termination inductance of second electric capacity; Another termination the 3rd electric capacity of described inductance, the drain electrode of metal-oxide-semiconductor, the anode of first diode; The other end of described the 3rd electric capacity is connected in series first resistance successively and the 4th resistance arrives ground; The grid of described metal-oxide-semiconductor connects second resistance, the 3rd resistance, the source electrode resistance grounded of metal-oxide-semiconductor; The anode of another termination second diode of described the 3rd resistance; The GD pin of another chip termination L6562 of the negative electrode of described second diode and described second resistance; The ZCD pin of the public chip termination L6562 of described first resistance and the 4th resistance; Described first electric capacity two terminates between the negative electrode and ground of first diode; The source electrode of described metal-oxide-semiconductor is through the 5th resistance and the 4th capacity earth.
7. the driving power of light-emitting diode according to claim 6, it is characterized in that the peripheral circuit of described chip L6562 comprises: the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity;
The INV pin of described chip L6562 is through the 6th grounding through resistance; The COMP pin is through the 8th resistance and the 6th grounding through resistance; Described the 7th resistance and the 6th electric capacity and be connected in the INV pin and the COMP pin between; The CS pin is through the 4th capacity earth; The MULT pin is through the 7th capacity earth, and described the tenth resistance and the 11 resistance also are connected in described the 7th electric capacity two ends; Described the 9th resistance and be connected in the COMP pin and the MULT pin between; The VCC pin connects working power and the 5th electric capacity, the other end ground connection of described the 5th electric capacity; GND pin ground connection.
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| CN2010202119332U CN201813590U (en) | 2010-06-02 | 2010-06-02 | Driving power supply of light-emitting diode |
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| CN2010202119332U CN201813590U (en) | 2010-06-02 | 2010-06-02 | Driving power supply of light-emitting diode |
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| CN201813590U true CN201813590U (en) | 2011-04-27 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740525A (en) * | 2012-07-13 | 2012-10-17 | 木林森股份有限公司 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
| CN102946665A (en) * | 2012-08-16 | 2013-02-27 | 欧普照明股份有限公司 | Multiway-out LED driving system and semi-conductor lighting device |
| CN103002626A (en) * | 2011-09-14 | 2013-03-27 | 欧司朗股份有限公司 | Dimmable lighting module and directive lighting device with same |
| CN104219854A (en) * | 2014-09-26 | 2014-12-17 | 三峡大学 | Multiplexed output high-voltage-reduction LED constant-current driving power supply |
| CN104270864A (en) * | 2014-10-10 | 2015-01-07 | 无锡华润矽科微电子有限公司 | Circuit capable of achieving line voltage detection based on zero-cross detection pin |
| CN106026718A (en) * | 2015-03-30 | 2016-10-12 | 英飞凌科技奥地利有限公司 | System and Method for a Switched-Mode Power Supply |
| CN110784114A (en) * | 2019-11-14 | 2020-02-11 | 杭州必易微电子有限公司 | Voltage conversion circuit and conversion method for non-isolated AC-DC voltage conversion system |
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2010
- 2010-06-02 CN CN2010202119332U patent/CN201813590U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103002626A (en) * | 2011-09-14 | 2013-03-27 | 欧司朗股份有限公司 | Dimmable lighting module and directive lighting device with same |
| CN103002626B (en) * | 2011-09-14 | 2017-06-09 | 欧司朗股份有限公司 | Dimmable lighting component and the indicative lighting device with adjustable optical assembly |
| CN102740525A (en) * | 2012-07-13 | 2012-10-17 | 木林森股份有限公司 | Constant current power supply of HV-LED lamp without electrolytic capacitor and integrated circuit |
| CN102946665A (en) * | 2012-08-16 | 2013-02-27 | 欧普照明股份有限公司 | Multiway-out LED driving system and semi-conductor lighting device |
| CN104219854A (en) * | 2014-09-26 | 2014-12-17 | 三峡大学 | Multiplexed output high-voltage-reduction LED constant-current driving power supply |
| CN104270864A (en) * | 2014-10-10 | 2015-01-07 | 无锡华润矽科微电子有限公司 | Circuit capable of achieving line voltage detection based on zero-cross detection pin |
| CN106026718A (en) * | 2015-03-30 | 2016-10-12 | 英飞凌科技奥地利有限公司 | System and Method for a Switched-Mode Power Supply |
| US9991791B2 (en) | 2015-03-30 | 2018-06-05 | Infineon Technologies Austria Ag | System and method for a switched-mode power supply |
| US10148175B2 (en) | 2015-03-30 | 2018-12-04 | Infineon Technologies Austria Ag | System and method for a switched-mode power supply |
| CN110784114A (en) * | 2019-11-14 | 2020-02-11 | 杭州必易微电子有限公司 | Voltage conversion circuit and conversion method for non-isolated AC-DC voltage conversion system |
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