CN104902627B - A kind of LED power circuit - Google Patents
A kind of LED power circuit Download PDFInfo
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- CN104902627B CN104902627B CN201510257618.0A CN201510257618A CN104902627B CN 104902627 B CN104902627 B CN 104902627B CN 201510257618 A CN201510257618 A CN 201510257618A CN 104902627 B CN104902627 B CN 104902627B
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Abstract
The invention discloses a kind of LED power circuit, including power input unit, filter unit, driver element, Transformer Rectifier Unit, feedback unit and control unit, power input unit is connected with filter unit, filter unit is connected with driver element, driver element is connected with Transformer Rectifier Unit, Transformer Rectifier Unit is connected with feedback unit with control unit respectively, and feedback unit is connected with control unit.LED power circuit of the present invention uses driver element, effectively can provide maintenance electric current for LED lamp source, and prevents by rush of current when it from dimming ahead of the curve, so that above-mentioned LED power circuit efficiency is higher, compatibility and reliability are higher.
Description
Technical field
The present invention relates to electronic technology field, and in particular to a kind of LED power circuit.
Background technology
LED illumination is energy-efficient with its, and environmental nonpollution, good visual effect, long lifespan plurality of advantages progressively replace
Most traditional lighting mode, the main flow developed as lighting engineering.General LED lamp is all to concentrate on many LED lamp beads
Together, the style close with conventional lamp, such as LED daylight lamp, LED extinctions lamp, LED spotlight etc are made.But in LED illumination
Technical field, also there is the popularization and application that many problems hinder LED illumination.
Conventional lamp such as incandescent lamp, the light adjusting circuit of Halogen lamp LED are one controllable silicon light modulations of series connection before its power line.When
The thyristor regulating optical circuit of conventional lamp is applied in LED illumination System, because existing LED illumination is generally using alternating-current switch electricity
Source provides constant current driving, and it is unstable that its drive circuit has an electric power output voltage, the problem of power supply and light modulator poor compatibility.
The content of the invention
Therefore, we have proposed a kind of LED power circuit, for solve low power in the prior art, poor compatibility,
The problem of reliability is low.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of LED power circuit, including power input unit, filter unit, driver element, Transformer Rectifier Unit, feedback
Unit and control unit, power input unit are connected with filter unit, and filter unit is connected with driver element, and driver element is with becoming
Rectification unit connection is pressed, Transformer Rectifier Unit is connected with feedback unit with control unit respectively, and feedback unit connects with control unit
Connect；
The driver element includes triode Q1 and triode Q2, wherein triode Q1 collector and triode Q2 emitter-base bandgap grading
Connect, and triode Q1 collector and triode Q2 emitter-base bandgap grading are connected with diode D6 positive pole and diode D5 negative pole,
Triode Q1 emitter-base bandgap grading is connected with diode D5 positive pole, and diode D6 negative pole is connected with triode Q2 collector；Triode
Q2 collector is also sequentially connected in series with resistance R8, resistance R9, electric capacity C10, and is finally connected with transformer；Triode Q2 base
Pole is sequentially connected in series with resistance R7, resistance R6, diode D7, and diode D7 negative pole is connected with resistance R6, diode D7
Positive pole be connected with transformer, wherein resistance R6, resistance R9, resistance R7 and electric capacity C10 negative pole intersect at A points, and the A points are also
It is connected with resistance R10, the resistance R10 other end is connected with transformer；Triode Q1 collector also with resistance R14, resistance R15,
Electric capacity C11 is sequentially connected in series, and is finally connected with transformer；Triode Q1 base stage and resistance R11, resistance R12, diode
D8 is sequentially connected in series, and diode D8 negative pole is connected with resistance R12, and diode D8 positive pole is connected with transformer, wherein
Resistance R12, resistance R11, resistance R15 and electric capacity C11 negative pole intersect at B points, and the B points are also connected with resistance R13, resistance
The R13 other end is connected with transformer.
By above-mentioned technical proposal, the beneficial effect that the present invention is obtained is：LED power circuit uses driver element, can
Effectively to provide maintenance electric current for LED lamp source, and prevent by rush of current when it from dimming ahead of the curve, so that above-mentioned
LED power circuit efficiency is higher, and compatibility and reliability are higher.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is structural representation of the invention；
Fig. 2 is power input unit, the circuit diagram of filter unit in Fig. 1；
Fig. 3 is the circuit diagram of driver element in Fig. 1.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
With reference to embodiment and embodiment, the present invention is further detailed explanation.Embodiment
With reference to shown in Fig. 1, Fig. 2 and Fig. 3：
A kind of LED power circuit, including power input unit, filter unit, driver element, Transformer Rectifier Unit, feedback
Unit and control unit, power input unit are connected with filter unit, and filter unit is connected with driver element, and driver element is with becoming
Rectification unit connection is pressed, Transformer Rectifier Unit is connected with feedback unit with control unit respectively, and feedback unit connects with control unit
Connect.Wherein as shown in Fig. 2 220V external connections are connected with power input unit, and one is carried out by electric capacity CY1 and electric capacity CY2
Secondary filtering and security control, secondary input point security control is being carried out by small relay CX2.Then unit after filtering again,
The filter unit is filtered place by diode D1, diode D2, diode D3, diode the D4 bridge filter circuit constituted
Reason.Electric current after after filtering enters driver element and carries out the distribution of power supply, and is controlled control, feedback by control unit
Member is used to feed back an operating voltage to control unit from Transformer Rectifier Unit.
The driver element includes triode Q1 and triode Q2, wherein triode Q1 collector and triode Q2 emitter-base bandgap grading
Connect, and triode Q1 collector and triode Q2 emitter-base bandgap grading are connected with diode D6 positive pole and diode D5 negative pole,
Triode Q1 emitter-base bandgap grading is connected with diode D5 positive pole, and diode D6 negative pole is connected with triode Q2 collector；Triode
Q2 collector is also sequentially connected in series with resistance R8, resistance R9, electric capacity C10, and is finally connected with transformer；Triode Q2 base
Pole is sequentially connected in series with resistance R7, resistance R6, diode D7, and diode D7 negative pole is connected with resistance R6, diode D7
Positive pole be connected with transformer, wherein resistance R6, resistance R9, resistance R7 and electric capacity C10 negative pole intersect at A points, and the A points are also
It is connected with resistance R10, the resistance R10 other end is connected with transformer；Triode Q1 collector also with resistance R14, resistance R15,
Electric capacity C11 is sequentially connected in series, and is finally connected with transformer；Triode Q1 base stage and resistance R11, resistance R12, diode
D8 is sequentially connected in series, and diode D8 negative pole is connected with resistance R12, and diode D8 positive pole is connected with transformer, wherein
Resistance R12, resistance R11, resistance R15 and electric capacity C11 negative pole intersect at B points, and the B points are also connected with resistance R13, resistance
The R13 other end is connected with transformer.
The beneficial effect that the present invention is obtained is：LED power circuit uses driver element, can be effectively LED lamp source
There is provided and maintain electric current, and prevent when it from dimming ahead of the curve by rush of current so that above-mentioned LED power circuit efficiency compared with
Height, compatibility and reliability are higher.
Above-described is only the preferred embodiment of the present invention, it is noted that for one of ordinary skill in the art
For, without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the present invention
Protection domain.
Claims (1)
1. a kind of LED power circuit, it is characterised in that：Including power input unit, filter unit, driver element, Transformer Rectifier
Unit, feedback unit and control unit, power input unit are connected with filter unit, and filter unit is connected with driver element, are driven
Moving cell is connected with Transformer Rectifier Unit, and Transformer Rectifier Unit is connected with feedback unit with control unit respectively, feedback unit with
Control unit is connected；
The driver element includes triode Q1 and triode Q2, and wherein triode Q1 collector and triode Q2 emitter-base bandgap grading connects
Connect, and triode Q1 collector and triode Q2 emitter-base bandgap grading are connected with diode D6 positive pole and diode D5 negative pole, three
Pole pipe Q1 emitter-base bandgap grading is connected with diode D5 positive pole, and diode D6 negative pole is connected with triode Q2 collector；Triode Q2
Collector be also sequentially connected in series with resistance R8, resistance R9, electric capacity C10, and be finally connected with transformer；Triode Q2 base stage
It is sequentially connected in series with resistance R7, resistance R6, diode D7, and diode D7 negative pole is connected with resistance R6, diode D7's
Positive pole is connected with transformer, and wherein resistance R6, resistance R9, resistance R7 and electric capacity C10 negative pole intersect at A points, the A points also with
Resistance R10 connections, the resistance R10 other end is connected with transformer；Triode Q1 collector also with resistance R14, resistance R15, electricity
Hold C11 to be sequentially connected in series, and be finally connected with transformer；Triode Q1 base stage and resistance R11, resistance R12, diode D8
It is sequentially connected in series, and diode D8 negative pole is connected with resistance R12, diode D8 positive pole is connected with transformer, wherein electricity
The negative pole for hindering R12, resistance R11, resistance R15 and electric capacity C11 intersects at B points, and the B points are also connected with resistance R13, resistance R13
The other end be connected with transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257618.0A CN104902627B (en) | 2015-07-14 | 2015-07-14 | A kind of LED power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510257618.0A CN104902627B (en) | 2015-07-14 | 2015-07-14 | A kind of LED power circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104902627A CN104902627A (en) | 2015-09-09 |
| CN104902627B true CN104902627B (en) | 2017-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510257618.0A Active CN104902627B (en) | 2015-07-14 | 2015-07-14 | A kind of LED power circuit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023333A (en) * | 2018-01-31 | 2018-05-11 | 常州斯坦博电子科技有限公司 | Load short circuits protection power source circuit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5982106A (en) * | 1992-02-24 | 1999-11-09 | Bobel; Andrzej | Self-protected series resonant electronic energy converter |
| JP2006261050A (en) * | 2005-03-18 | 2006-09-28 | Nec Lighting Ltd | Inverter circuit for cold cathode discharge tube |
| CN201307960Y (en) * | 2008-12-02 | 2009-09-09 | 深圳市亮百佳电子科技有限公司 | LED constant-current source of alternating current controlled silicon dimming mode |
| CN201652741U (en) * | 2010-02-05 | 2010-11-24 | 东莞市金鸿盛电器有限公司 | Movable air conditioner |
| CN101835314B (en) * | 2010-05-19 | 2013-12-04 | 成都芯源系统有限公司 | LED drive circuit with dimming function and lamp |
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| CN104902627A (en) | 2015-09-09 |
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