CN108235525B - LED drive circuit - Google Patents
LED drive circuit Download PDFInfo
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- CN108235525B CN108235525B CN201810183668.2A CN201810183668A CN108235525B CN 108235525 B CN108235525 B CN 108235525B CN 201810183668 A CN201810183668 A CN 201810183668A CN 108235525 B CN108235525 B CN 108235525B
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Abstract
A kind of LED drive circuit,, reliability lower the generally existing transfer efficiency of existing homogeneous circuit it is poor with higher cost aiming at the problem that, using the special circuit design for the single transistor self-oscillation and output for being made of positive-feedback circuit magnetic ring coil, not only significantly improve the transfer efficiency and reliability of circuit, the cost for also considerably reducing LED drive circuit is widely used as the driving circuit of various LED illumination Systems.
Description
The application is that application No. is 2013101224965, invention and created names are as follows: LED drive circuit, the applying date are as follows:
The divisional application of application for a patent for invention on 04 10th, 2013.
Technical field
It is especially a kind of using the list for being made of positive-feedback circuit magnetic ring coil the present invention relates to a kind of LED drive circuit
The LED drive circuit of transistor self-oscillation and output.
Background technique
LED light is acknowledged as current optimal green due to high luminous efficiency and the particular advantages of no mercury pollution
Color lighting source greatly develops the mainstream that Modern Green illumination development is had become with popularization LED illumination.
Currently, development of the LED illumination in China is extremely rapid, 1 year step of the main performance index of LED light source
It is continuously improved, the continuous reduction of corresponding price but 1 year step, the quick soaring indication LED light of cost performance is in high volume
The opportunity for entering the room outer lighting area has arrived.
LED drive circuit is the chief component of LED light, it not only directly affect the system effectiveness of LED light, the service life with
Other important performance characteristics also directly affect the cost of LED light.The development experience of China's energy-saving lamp clearly shows that one is produced per month
Millions of, up to ten million, that is, produce the enterprise of several hundred million energy-saving lamps per year, if the cost of the driving circuit of every lamp reduces by 1 point of,
It is every year exactly the net profit of millions of members；If it is exactly annual several ten million yuan of net profit that every, which reduces by 1 mao of cost,！Therefore, I
Energy-saving lamp enterprise, state all descends the foot time to reduce driving circuit to the maximum extent under the premise of the performance for guaranteeing lamp meets the requirements
Cost.Obviously, today of energy-saving lamp will be in high volume replaced in LED light, the importance that LED drive circuit reduces cost is not held
Doubt.
It is the circuit system of core (refering to a kind of patent " big function that the currently prevailing LED drive circuit, which is mostly using integrated circuit,
Rate LED drive circuit ", the patent No. 201110179478.1), though these circuits have the advantages of constant current more, transfer efficiency is inadequate
High (for 85% or so), and reliability is lower.Especially higher cost makes LED light be difficult to high-volume and promotes.
Summary of the invention
In order to which the cost of LED drive circuit is greatly lowered and significantly improves its transfer efficiency and functional reliability, thus
Effectively solve the problems, such as that current LED light is difficult to high-volume and promotes and applies, the present invention devises the circuit that instrument is made of discrete component
The foolproof New LED driving circuit of structure.It is by insurance resistance or fuse, full-wave rectifying circuit, anti-jamming circuit, filter
Wave capacitor and high-frequency self-excitation oscillation are collectively constituted with output circuit, it is characterized in that high-frequency self-excitation therein oscillation and output electricity
Road is a kind of new-type circuit of single transistor self-oscillation and output that positive-feedback circuit is formed using magnetic ring coil.
High-frequency self-excitation of the invention vibrates and output circuit is designed specifically to: by the armature winding (N1) of magnetic ring coil,
The series circuit of inductance (L2) and output capacitance (C4) composition is connected to the collector (c) and filter capacitor (C1) of transistor (TR)
Anode between；LED information display system as load is connected to the both ends of output capacitance (C4)；Buffer capacitor (C2) and freewheeling diode
(D5) it is also connected in parallel between the collector (c) of transistor (TR) and the anode of filter capacitor (C1), and wherein two pole of afterflow
The negative terminal of pipe (D5) is connect with the anode of filter capacitor (C1), the anode of diode (D5) and the collector (c) of transistor (TR)
Connection；The series circuit connection being made of the secondary windings (N2) of partiting dc capacitor (C3), base resistance (R3) and magnetic ring coil
Between the base stage (b) of transistor (TR) and the negative terminal of capacitor (C1)；Diode (D6) of releasing also is parallel to base stage (b) and capacitor
(C1) between negative terminal, and the negative terminal of diode (D6) is connect with base stage (b), the anode of diode (D6) and bearing for capacitor (C1)
End connection；Emitter resistance (R4) is connected between the emitter (e) of transistor (TR) and the negative terminal of capacitor (C1)；Biasing resistance
(R2) it is connected between the anode of capacitor (C1) and the base stage (b) of transistor (TR).
Wherein the circle number of magnetic ring coil armature winding (N1) can be in 1 circle to 20 according to the difference of magnet ring sectional area and magnetic conductivity
It is chosen between circle, the circle number (N2) of secondary windings is chosen in 2 circles between 15 circles；Output capacitance (C4) and partiting dc capacitor (C3)
Thin film capacitor can be used, electrolytic capacitor can also be used, capacity is selected in 0.1 microfarad between 50 microfarads.Using electrolysis electricity
Container cost can be slightly lower, but the high temperature lower service life is shorter；The resistance value of emitter resistance (R4) therein can 0 ohm to 50 ohm it
Between select, the smaller circuit conversion efficiency of resistance value is higher, but temperature stability is a bit weaker.As for the selection of other components,
It is determined in debugging according to the parameter request to driving circuit.
Using LED drive circuit of the invention, circuit conversion efficiency is up to 90% or more, since circuit is extremely simple, therefore
Debugging is easy, failure rate is low, high reliablity.Especially its cost is greatly reduced to half hereinafter, advantageous than similar product
It is promoted and applied in the high-volume of LED light.
The present invention is further illustrated with embodiment with reference to the accompanying drawing.
Detailed description of the invention
Scheme the circuit diagram first is that of the invention.
Dashed rectangle 1 is rectifying and wave-filtering and anti-jamming circuit of the invention in figure, because it is similar to conventional homogeneous circuit,
Without being discussed in detail；Dashed rectangle 2 is that there is the present invention high-frequency self-excitation of distinct characteristic to vibrate simultaneous output circuit, and wherein TR is double
Bipolar transistor, c, b, e are respectively its collector, base stage, emitter；L2 is energy storage inductor；N1 be magnetic ring coil it is primary around
Group, N2 are secondary windings；C4 is output capacitance；LED indicates the LED information display system as load；D5 is freewheeling diode；C2 is buffering
Capacitor；R2, R3, R4 are respectively biasing resistance, base resistance, emitter resistance；C3 is partiting dc capacitor；D6 is two poles of releasing
Pipe.
Specific embodiment
The embodiment of the present invention is the driving circuit of 10W LEDbulb lamp, and circuit diagram is as shown in the picture.
Wherein the LED information display system as load is connected in series by 55 5730 type LED；C2, C3, C4 are thin film capacitor,
Capacity is respectively 1nF, 220nF, 100nF；The inductance of L2 is 8mH；The primary and secondary winding of magnetic ring coil is respectively 15 circles and 5
Circle；R2, R3, R4 are respectively 1M Ω, 75 Ω, 0 Ω；D5, D6 are the fast recovery diode of FR107 type；TR is the 13002 of 92 encapsulation
Type bipolar junction transistor.When input supply voltage is alternating current 220V, circuit input power is about 10W, and transfer efficiency is about
94%.Circuit cost reduces by more than 50 than similar product.
Claims (1)
1. a kind of LED driver circuit, by insurance resistance or fuse, full-wave rectifying circuit, anti-jamming circuit, filter capacitor with
And the higher-order of oscillation is collectively constituted with output circuit, it is characterized in that the higher-order of oscillation therein and output circuit are using magnetic ring coil group
At the circuit of single transistor high frequency self-oscillation and the output of positive-feedback circuit；It is therein that positive feedback is formed using magnetic ring coil
Single transistor high frequency self-oscillation of circuit and output circuit have following circuit structure: by the armature winding of magnetic ring coil
(N1), the series circuit of inductance (L2) and output capacitance (C4) composition is connected to the collector (c) and filtered electrical of transistor (TR)
Between the anode for holding (C1)；LED information display system as load is connected to the both ends of output capacitance (C4)；Buffer capacitor (C2) and afterflow
Diode (D5) is also connected in parallel between the collector (c) of transistor (TR) and the anode of filter capacitor (C1), and is wherein continued
The negative terminal of stream diode (D5) is connect with the anode of filter capacitor (C1), anode and transistor (TR) of freewheeling diode (D5)
Collector (c) connection；The series electrical of secondary windings (N2) composition of partiting dc capacitor (C3), base resistance (R3) and magnetic ring coil
Road is connected between the base stage (b) of transistor (TR) and the negative terminal of filter capacitor (C1)；Diode (D6) of releasing also is parallel to base
Between pole (b) and filter capacitor (C1) negative terminal, and the negative terminal of diode of releasing (D6) is connect with base stage (b), diode of releasing
(D6) anode is connect with the negative terminal of filter capacitor (C1)；Emitter resistance (R4) is connected to the emitter (e) of transistor (TR)
Between filter capacitor (C1) negative terminal；Biasing resistance (R2) is connected to the anode of filter capacitor (C1) and the base stage of transistor (TR)
(b) between；It is therein to be formed in single transistor high frequency self-oscillation and the output circuit of positive-feedback circuit using magnetic ring coil
Magnetic ring coil have primary with secondary two windings, wherein the circle number of primary winding is chosen in 1 circle to 20 circle ranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810183668.2A CN108235525B (en) | 2013-04-10 | 2013-04-10 | LED drive circuit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122496.5A CN104105242B (en) | 2013-04-10 | 2013-04-10 | Led drive circuit |
| CN201810183668.2A CN108235525B (en) | 2013-04-10 | 2013-04-10 | LED drive circuit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310122496.5A Division CN104105242B (en) | 2013-04-10 | 2013-04-10 | Led drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108235525A CN108235525A (en) | 2018-06-29 |
| CN108235525B true CN108235525B (en) | 2019-07-26 |
Family
ID=51672933
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310122496.5A Active CN104105242B (en) | 2013-04-10 | 2013-04-10 | Led drive circuit |
| CN201810183668.2A Expired - Fee Related CN108235525B (en) | 2013-04-10 | 2013-04-10 | LED drive circuit |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310122496.5A Active CN104105242B (en) | 2013-04-10 | 2013-04-10 | Led drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN104105242B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110167227B (en) * | 2018-02-14 | 2022-09-09 | 松下知识产权经营株式会社 | Open-circuit protection circuit, power supply circuit, open-circuit protection method and lighting device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0142063A1 (en) * | 1983-10-19 | 1985-05-22 | Hitachi Lighting, Ltd. | Lighting apparatus for an electric discharge lamp |
| CN2792082Y (en) * | 2005-04-15 | 2006-06-28 | 李大明 | LED lighting device |
| CN201336746Y (en) * | 2008-05-05 | 2009-10-28 | 汤征宁 | Constant current and voltage drive circuit for AC power supply LED |
| KR100994246B1 (en) * | 2009-10-23 | 2010-11-12 | 주식회사 유성반도체 | Circuit for driving led lamp |
| CN201976288U (en) * | 2010-12-22 | 2011-09-14 | 张心益 | Drive power supply for LED illuminating light |
| CN102752904A (en) * | 2011-04-19 | 2012-10-24 | 薛伯钱 | Regulated power supply for light emitting diode (LED) energy saving lamps |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101861016A (en) * | 2010-05-11 | 2010-10-13 | 南通中润照明电器有限公司 | Dimming switch power supply device of LED lamp |
| US9674923B2 (en) * | 2011-05-27 | 2017-06-06 | Panasonic Intellectual Property Management Co., Ltd. | Lighting circuit and lamp |
| CN102905415A (en) * | 2011-07-29 | 2013-01-30 | 成都蜀昌科技有限公司 | LED (Light Emitting Diode) driving power supply without electrolytic capacitors |
| CN102594155A (en) * | 2012-03-30 | 2012-07-18 | 江苏晟芯微电子有限公司 | Primary edge control type switch power supply with high-precision constant-voltage/constant-current output and high-pulse-frequency (PF) value |
-
2013
- 2013-04-10 CN CN201310122496.5A patent/CN104105242B/en active Active
- 2013-04-10 CN CN201810183668.2A patent/CN108235525B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0142063A1 (en) * | 1983-10-19 | 1985-05-22 | Hitachi Lighting, Ltd. | Lighting apparatus for an electric discharge lamp |
| CN2792082Y (en) * | 2005-04-15 | 2006-06-28 | 李大明 | LED lighting device |
| CN201336746Y (en) * | 2008-05-05 | 2009-10-28 | 汤征宁 | Constant current and voltage drive circuit for AC power supply LED |
| KR100994246B1 (en) * | 2009-10-23 | 2010-11-12 | 주식회사 유성반도체 | Circuit for driving led lamp |
| CN201976288U (en) * | 2010-12-22 | 2011-09-14 | 张心益 | Drive power supply for LED illuminating light |
| CN102752904A (en) * | 2011-04-19 | 2012-10-24 | 薛伯钱 | Regulated power supply for light emitting diode (LED) energy saving lamps |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104105242B (en) | 2018-06-19 |
| CN108235525A (en) | 2018-06-29 |
| CN104105242A (en) | 2014-10-15 |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190628 Address after: 518000 7 floors workshop of Shiyan Economic Development Corporation, No. 4 Industrial Zone, Shiyan Street, Baoan District, Shenzhen City, Guangdong Province Applicant after: Shenzhen Xiangshuo Photoelectric Co., Ltd. Address before: 830000 the Xinjiang Uygur Autonomous Region science and Technology Development Zone, Urumqi, new town, No. 384, science 1 street. Applicant before: URUMQI JIUPIN SESAME INFORMATION TECHNOLOGY CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190726 Termination date: 20210410 |