CN101600277A - A kind of led circuit - Google Patents
A kind of led circuit Download PDFInfo
- Publication number
- CN101600277A CN101600277A CNA2009101086742A CN200910108674A CN101600277A CN 101600277 A CN101600277 A CN 101600277A CN A2009101086742 A CNA2009101086742 A CN A2009101086742A CN 200910108674 A CN200910108674 A CN 200910108674A CN 101600277 A CN101600277 A CN 101600277A
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- unit
- led circuit
- led
- power factor
- switch
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- 230000005669 field effect Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 description 10
- 238000005286 illumination Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention relates to comprise a kind of led circuit, comprise the power factor controlling and boosting unit, LED lamp and the pressure unit that connect successively, also comprise the control unit and the detecting unit thereof that are connected with them, described power factor controlling and boosting unit and pressure unit work alone.This led circuit, on electric current output basis of constant, can also adjust the phase difference between input voltage and loop current, thereby corrected output factor significantly obtains high operating efficiency, regulate brightness, good stability, reliability height than the prior art flicker free simultaneously.
Description
Technical field
The present invention relates to Digital Signal Processing, be specifically related to a kind of led circuit.
Background technology
At the LED applied technical field, particularly LED lighting technical field of current develop rapidly, no matter be great power LED or middle low power LED, consider operating efficiency, its drive circuit generally all adopts the constant current switch power supply, and abandons linear power supply.According to its working method, probably can be divided into following a few class: voltage-dropping type drive circuit BUCK; Booster type drive circuit BOOST; Buck-boost type drive circuit BOOST-BUCK, as: concrete structure is as shown in Figure 1; Falling-rising voltage-dropping type drive circuit BBB; Falling-rising die mould drive circuit BUCK-BOOST: though these several modes also are that pluses and minuses are respectively arranged, but they have a common characteristic: whole driving application circuit only contains a field effect transistor MOSFET, this just limits this application scheme can only use its boost BOOST and step-down BUCK function simultaneously, and can not independently separate application; Therefore they can only accomplish to export when constant at electric current, increase its operating efficiency as far as possible.
Summary of the invention
The technical issues that need to address of the present invention are, how a kind of led circuit is provided, and can have perfect power factor, and flicker free is regulated brightness, and good stability, reliability are high, are particluarly suitable for the high-power LED illumination technical field.
The technology of the present invention problem solves like this, makes up a kind of led circuit, comprises LED lamp and pressure unit, also comprises:
Power factor controlling and boosting unit constitute the loop with LED lamp, pressure unit and input power supply successively, separate with described pressure unit to work alone, be used to boost and adjust phase difference between input voltage and loop current;
Detecting unit is connected with described input power supply, is used to detect input voltage and loop current;
Control unit is connected with described detecting unit, described power factor controlling of control connection and boosting unit, LED lamp and pressure unit.
According to led circuit provided by the invention, described detecting unit and control unit include, but are not limited to adopt the mode that is built in the integrated chip.
According to led circuit provided by the invention, described power factor controlling and boosting unit comprise electric capacity between inductance, diode and described diode cathode and the ground that is serially connected on the described loop and the switch between described diode anode and the ground, and described switch control end is connected with described control unit; Pressure unit comprises another switch in the described led circuit, and this another switch control end also is connected with described control unit.
According to led circuit provided by the invention, described switch is a field effect transistor.
According to led circuit provided by the invention, the bridge rectifier unit that described input power supply is an external AC.
Led circuit provided by the invention, adopt two field effect transistor, independent boost BOOST and the step-down BUCK unit of separately using, on electric current output basis of constant, can also adjust the phase difference between input voltage and loop current like this, thereby corrected output factor significantly, obtain high operating efficiency, regulate brightness, good stability, reliability height than the prior art flicker free simultaneously.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is traditional buck-boost type led drive circuit structural representation;
Fig. 2 is a led drive circuit theory diagram of the present invention;
Fig. 3 is the circuit theory schematic diagram of the specific embodiment of the invention.
Embodiment
As shown in Figure 2, led circuit of the present invention comprises:
The input power supply is for each circuit unit provides working power;
Power factor controlling and boosting unit are used to boost and adjust phase difference between input voltage and loop current;
The LED lamp provides LED illumination;
Pressure unit is used for step-down, one is used from stabling current output with described boosting;
Above-mentioned input power supply, power factor controlling and boosting unit, LED lamp and pressure unit constitute the loop, also comprise:
Detecting unit is connected with described input power supply, is used to detect input voltage and loop current;
Control unit is connected with described detecting unit, described power factor controlling of control connection and boosting unit, LED lamp and pressure unit.
Circuit of the present invention is on traditional buck-boost type led drive circuit basis, increase a control switch, make boost BOOST and step-down BUCK unit can independently separate use, make boosting unit upgrade to power factor controlling and boosting unit, on electric current output basis of constant, can also adjust the phase difference between input voltage and loop current like this, thereby can the corrected output factor, obtain high operating efficiency.
As shown in Figure 3, in the specific embodiment of the invention detecting unit and control unit are integrated in the integrated chip 1 of customization, the operation principle of this circuit is:
Input voltage is direct current or interchange, through behind the bridge rectifier, cooperate the waveform that detects input voltage by integrated chip 1 pin BLDR, learn whether need to regulate brightness after, integrated chip 1 draws the current attenuation signal and controls the switch of field effect transistor Q3 from pin CG1 output, and can finally control step-down module BUCK; Cooperate by integrated chip 1 pin VSNS and pin ISNS simultaneously and detect input voltage and loop current waveform, draw voltage, phase difference between the electric current, by integrated chip 1 handle automatically and from pin pfc G provide compensating signal give next stage==" power factor controlling and boosting unit 2.
Direct voltage after the rectification inputs to power factor controlling and this one-level of boosting unit PFC Boost, controls the switch of field effect transistor Q2 by compensating signal, obtains perfect current-voltage waveform, and power factor is almost 1.Export to next stage==" step-down module BUCK.
The current attenuation signal produces the switch angle that signal is used for controlling step-down module BUCK field effect transistor Q3 after this integrated chip 1 is handled, use thereby guarantee to export the electric current supply LED illumination that is fit to.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to the covering scope of claim of the present invention.
Claims (6)
1, a kind of led circuit comprises LED lamp and pressure unit, it is characterized in that, also comprises:
Power factor controlling and boosting unit constitute the loop with LED lamp, pressure unit and input power supply successively, separate with described pressure unit to work alone, be used to boost and adjust phase difference between input voltage and loop current;
Detecting unit is connected with described input power supply, is used to detect input voltage and loop current;
Control unit is connected with described detecting unit, described power factor controlling of control connection and boosting unit, LED lamp and pressure unit.
According to the described led circuit of claim 1, it is characterized in that 2, described detecting unit and control unit are built in the integrated chip.
3, according to the described led circuit of claim 1, it is characterized in that, described power factor controlling and boosting unit comprise electric capacity between inductance, diode and described diode cathode and the ground that is serially connected on the described loop and the switch between described diode anode and the ground, and described switch control end is connected with described control unit.
According to the described led circuit of claim 3, it is characterized in that 4, pressure unit comprises another switch in the described led circuit, this another switch control end is connected with described control unit.
5, according to claim 3 or 4 described led circuits, it is characterized in that described switch is a field effect transistor.
6, according to the described led circuit of claim 1, it is characterized in that the bridge rectifier unit that described input power supply is an external AC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101086742A CN101600277B (en) | 2009-07-13 | 2009-07-13 | LED circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101086742A CN101600277B (en) | 2009-07-13 | 2009-07-13 | LED circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101600277A true CN101600277A (en) | 2009-12-09 |
| CN101600277B CN101600277B (en) | 2012-10-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101086742A Expired - Fee Related CN101600277B (en) | 2009-07-13 | 2009-07-13 | LED circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101600277B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101778507A (en) * | 2009-12-10 | 2010-07-14 | 海洋王照明科技股份有限公司 | LED control circuit |
| CN101861022A (en) * | 2010-05-27 | 2010-10-13 | 上海北京大学微电子研究院 | LED driving power and starting method of power tube thereof |
| CN102196635A (en) * | 2011-03-11 | 2011-09-21 | 苏州卓能微电子技术有限公司 | Opening method of output tube of LED drive integrated circuit |
| CN103152946A (en) * | 2011-01-10 | 2013-06-12 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency LED (light emitting diode) driving circuit |
| CN104578799A (en) * | 2014-12-25 | 2015-04-29 | 成都芯源系统有限公司 | Switching power supply system and control circuit and control method thereof |
| WO2022011645A1 (en) * | 2020-07-16 | 2022-01-20 | 深圳市骁阳工程咨询有限公司 | Power supply device and sunlight simulation device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2715465Y (en) * | 2004-09-20 | 2005-08-03 | 林兴照 | High light emergency light |
| CN201043690Y (en) * | 2007-01-12 | 2008-04-02 | 邹日南 | Constantly illuminating mine lamp |
-
2009
- 2009-07-13 CN CN2009101086742A patent/CN101600277B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101778507A (en) * | 2009-12-10 | 2010-07-14 | 海洋王照明科技股份有限公司 | LED control circuit |
| CN101778507B (en) * | 2009-12-10 | 2013-06-12 | 海洋王照明科技股份有限公司 | LED control circuit |
| CN101861022A (en) * | 2010-05-27 | 2010-10-13 | 上海北京大学微电子研究院 | LED driving power and starting method of power tube thereof |
| CN103152946A (en) * | 2011-01-10 | 2013-06-12 | 矽力杰半导体技术(杭州)有限公司 | High-efficiency LED (light emitting diode) driving circuit |
| CN102196635A (en) * | 2011-03-11 | 2011-09-21 | 苏州卓能微电子技术有限公司 | Opening method of output tube of LED drive integrated circuit |
| CN104578799A (en) * | 2014-12-25 | 2015-04-29 | 成都芯源系统有限公司 | Switching power supply system and control circuit and control method thereof |
| CN104578799B (en) * | 2014-12-25 | 2017-04-12 | 成都芯源系统有限公司 | Switching power supply system and control circuit and control method thereof |
| WO2022011645A1 (en) * | 2020-07-16 | 2022-01-20 | 深圳市骁阳工程咨询有限公司 | Power supply device and sunlight simulation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101600277B (en) | 2012-10-31 |
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| C14 | Grant of patent or utility model | ||
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| CP02 | Change in the address of a patent holder | ||
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Address after: 518000 Tian'an International Building, Renmin South Road, Nanhu Street, Luohu District, Shenzhen City, Guangdong Province, B2101 Co-patentee after: Chen Yulin Patentee after: Liu Zhentao Address before: Room 1901, Block B, Tian'an International Building, Renmin South Road, Luohu District, Shenzhen City, Guangdong Province Co-patentee before: Chen Yulin Patentee before: Liu Zhentao |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 |