CN101977474A - Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance - Google Patents
Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance Download PDFInfo
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- CN101977474A CN101977474A CN2010105464663A CN201010546466A CN101977474A CN 101977474 A CN101977474 A CN 101977474A CN 2010105464663 A CN2010105464663 A CN 2010105464663A CN 201010546466 A CN201010546466 A CN 201010546466A CN 101977474 A CN101977474 A CN 101977474A
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Abstract
The invention relates to a drive circuit of a light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance, which comprises a fuse tube BX, resistances (R1, R2, R3 and R4), diodes (D1, D2, D3, D4 and D5), capacitors (C1, C2, C3, C4 and C5), transistors (Q1, Q2 and Q3) and a shunt reference source IC1 with three adjustable ends, wherein the transistor Q2, the resistance R3 and the capacitor C3 constitute a soft start circuit; the transistor Q3, the resistance R1, the resistance R2 and the capacitor C1 constitute a circuit for providing a tapping passage to the capacitor C3; and the transistor Q1, the shunt reference source IC1 with the three adjustable ends, the resistance R3 and the resistance R4 constitute a constant current circuit. The invention provides a set of LED constant current illuminating lamp circuits with the characteristics of the soft start and the shock resistance, which prolongs the service life of LED and has good effect after being used.
Description
Technical field
The invention belongs to lighting circuit drive controlling field, particularly relate to a kind of soft start protecting against shock LED constant current illuminating lamp drive circuit.
Background technology
LED is used widely at civil area in recent years owing to numerous advantages such as environmental protection, life-span length, photoelectric efficiency height.At present, just there is the electricity-saving lamp that much utilizes white light LEDs to make in market, but its drive circuit is simple resistance capacitance step-down or constant voltage driving, has that efficient is low, electric current changes greatly, do not have shortcoming such as impact resistance, easily make the too early light decay of LED, cause the lost of life.
Summary of the invention
The object of the present invention is to provide a kind of LED constant current illuminating lamp drive circuit, it has soft start and protecting against shock ability.
This soft start protecting against shock LED constant current illuminating lamp drive circuit, by cartridge fuse BX, resistance R 1, R2, R3, R4, diode D1, D2, D3, D4, D5, capacitor C 1, C2, C3, C4, C5, transistor Q1, Q2, Q3, three ends are adjustable, and shunting a reference source IC1 forms, wherein the e utmost point of transistor Q1 and capacitor C 5 one ends, resistance R 4 one ends, capacitor C 4 one ends, the reference utmost point of three ends are adjustable shunting a reference source IC1 joins, the c utmost point of transistor Q1 and capacitor C 5 other ends, LED lamp negative pole joins, the b utmost point of transistor Q1 and resistance R 3 one ends, capacitor C 4 other ends, the negative electrode of three ends are adjustable shunting a reference source IC1, the e utmost point of transistor Q2 joins; Anode, capacitor C 3 negative poles, the c utmost point of transistor Q3, capacitor C 2 negative poles, resistance R 2 one ends, capacitor C 1 negative pole, diode D3 positive pole, the diode D4 positive pole of the c utmost point of transistor Q2 and resistance R 4 other ends, three ends are adjustable shunting a reference source IC1 join, and the e utmost point of the b utmost point of transistor Q2 and capacitor C 3 positive poles, transistor Q3 joins; The b utmost point of transistor Q3 joins with resistance R 1 one ends, resistance R 2 other ends; The positive pole of diode D5 and diode D1 negative pole, diode D2 negative pole, capacitor C 1 positive pole, resistance R 1 other end join, and the negative pole of diode D5 and LED lamp positive pole, capacitor C 2 positive poles, resistance R 3 other ends join; AC220V civil power one utmost point joins with diode D1 positive pole, diode D3 negative pole by cartridge fuse BX, and another utmost point of AC220V civil power joins with diode D2 positive pole, diode D4 negative pole.
In this soft start protecting against shock LED constant current illuminating lamp drive circuit, transistor Q2, resistance R 3 and capacitor C 3 are formed soft starting circuit; The circuit that transistor Q3, resistance R 1, resistance R 2 and capacitor C 1 are formed is for capacitor C 3 provides the path of releasing; Transistor Q1, three ends are adjustable shunting a reference source IC1, resistance R 3 and resistance R 4 are formed constant-current circuits.
Good effect of the present invention is: this soft start protecting against shock LED constant current illuminating lamp drive circuit has the ability of protecting against shock, the ability of soft start and the ability of constant current power supply, has prolonged the life-span of LED, and through using, effect is more satisfactory.
Description of drawings
Fig. 1 is a soft start protecting against shock LED constant current illuminating lamp drive circuit schematic diagram of the present invention.
Embodiment
As shown in Figure 1, soft start protecting against shock LED constant current illuminating lamp drive circuit of the present invention, by 1A cartridge fuse BX, 470k Ω resistance R 1,82k Ω resistance R 2,60k Ω resistance R 3, the resistance R 4 of 60 Ω-140 Ω, diode (the D1 of 1N4007 model, D2, D3, D4, D5), 4.7 the capacitor C 1 of μ F, 2.2 the capacitor C 2 of μ F, 2.2 the capacitor C 3 of μ F, 103 capacitor C 4,682 capacitor C 5,13005 transistor Q1,8550 transistor Q2,8550 transistor Q3, TL431 three ends are adjustable, and shunting a reference source IC1 forms, wherein the e utmost point of transistor Q1 and capacitor C 5 one ends, resistance R 4 one ends, capacitor C 4 one ends, the reference utmost point of three ends are adjustable shunting a reference source IC1 joins, the c utmost point of transistor Q1 and capacitor C 5 other ends, the negative pole of LED lamp 1 joins, the b utmost point of transistor Q1 and resistance R 3 one ends, capacitor C 4 other ends, the negative electrode of three ends are adjustable shunting a reference source IC1, the e utmost point of transistor Q2 joins, the c utmost point of transistor Q2 and resistance R 4 other ends, the anode of three ends are adjustable shunting a reference source IC1, capacitor C 3 negative poles, the c utmost point of transistor Q2, capacitor C 2 negative poles, resistance R 2 one ends, capacitor C 1 negative pole, diode D3 positive pole, diode D4 positive pole joins, the b utmost point of transistor Q2 and capacitor C 3 positive poles, the e utmost point of transistor Q3 joins, the b utmost point of transistor Q3 and resistance R 1 one ends, resistance R 2 other ends join, the positive pole of diode D5 and diode D1 negative pole, diode D2 negative pole, capacitor C 1 positive pole, resistance R 1 other end joins, the positive pole of the negative pole of diode D5 and LED lamp 1, capacitor C 2 positive poles, resistance R 3 other ends join, AC220V civil power one utmost point is by cartridge fuse BX and diode D1 positive pole, diode D3 negative pole joins, another utmost point of AC220V civil power and diode D2 positive pole, diode D4 negative pole joins.
Transistor Q2, resistance R 3 and capacitor C 3 are formed soft starting circuit.When rigidly connecting energize, capacitor C 3 is equivalent to short circuit, and power supply arrives ground through b, the e of resistance R 3, transistor Q2 knot, capacitor C 3, transistor Q2 saturation conduction, the A point is pulled to electronegative potential, and transistor Q1 does not end because of there being base current, and the LED lamp is not luminous.After the charging of (t=1.1R3C3), capacitor C 3 both end voltage slowly raise through after a while, and transistor Q2 base current reduces gradually up to ending, the current potential that A is ordered slowly raises, transistor Q1 conducting gradually, the LED lamp is slowly luminous, thereby finishes soft start.
Surge voltage is from two aspects, and the one, when rigidly connecting energize, even the existence of soft starting circuit is arranged, still there is moment impact in LED lamp two ends, and this phenomenon can be found by observing the flash of light that LED sends, introduce C5 and can effectively absorb this impact in circuit.The another kind of impact is when circuit the moment break-make to take place, and promptly the energising back disconnects when connecting again, because capacitor C 3 both end voltage can not be suddenlyd change, soft start will lose efficacy.Therefore add the circuit of forming by transistor Q3, resistance R 1, resistance R 2 and capacitor C 1, for capacitor C 3 provides the path of releasing, like this, even instant cut-off is connected again, transistor Q3 also can saturation conduction, voltage on the capacitor C 3 is released, thereby guarantee the operate as normal of circuit.Add diode D5, avoid capacitor C 2 to cause the protecting against shock circuit malfunction to transistor Q3 discharge by resistance R 1.
Transistor Q1, three ends are adjustable shunting a reference source IC1, resistance R 3 and resistance R 4 are formed constant-current circuits.When causing flowing through the electric current increase of LED lamp for a certain reason or reducing, the voltage drop at sampling resistor R4 two ends also and then raises or reduces, the input terminal voltage of three ends are adjustable shunting a reference source IC1 also changes thereupon, thereby the current potential of control transistor Q1 base stage, the current constant that the LED lamp is flow through in maintenance is constant, its constant current value I=2.5 (V)/R4 (Ω).
In addition, for the reliability of circuit, note when selecting element: capacitor C 1, C2, C5 all should select the above electric capacity of withstand voltage 400V for use.The leakage current of capacitor C 3 is little, and the electrodeless electric capacity of selecting for use with good conditionsi is more than the withstand voltage 16V.Resistance R 1, R2, R3, R4 all use greater than 0.5W, and when the LED operating current was 20mA, the resistance of resistance R 4 was: R4=2.5/0.02mA=125 Ω.Available 80～90 the Φ 5mm astigmatism of LED lamp string type white light LEDs is in series, and many again groups are in parallel after also can connecting, to improve the brightness of lamp.When two groups parallel, R4=2.5/ (2 * 0.02mA)=62.5 Ω.
Claims (4)
1. soft start protecting against shock LED constant current illuminating lamp drive circuit, by cartridge fuse (BX), resistance (R1, R2, R3, R4), diode (D1, D2, D3, D4, D5), electric capacity (C1, C2, C3, C4, C5), transistor (Q1, Q2, Q3), shunting a reference source that three ends are adjustable (IC1) is formed, it is characterized in that: the e utmost point of transistor (Q1) and electric capacity (C5) end, resistance (R4) end, electric capacity (C4) end, the reference utmost point of shunting a reference source that three ends are adjustable (IC1) joins, the c utmost point of transistor (Q1) and electric capacity (C5) other end, LED lamp negative pole joins, the b utmost point of transistor (Q1) and resistance (R3) end, electric capacity (C4) other end, the negative electrode of shunting a reference source that three ends are adjustable (IC1), the e utmost point of transistor (Q2) joins; The c utmost point of the anode of the c utmost point of transistor (Q2) and resistance (R4) other end, three ends are adjustable shunting a reference source (IC1), electric capacity (C3) negative pole, transistor (Q3), electric capacity (C2) negative pole, resistance (R2) end, electric capacity (C1) negative pole, diode (D3) are anodal, diode (D4) positive pole joins, and the b utmost point of transistor (Q2) joins with the e utmost point of electric capacity (C3) positive pole, transistor (Q3); The b utmost point of transistor (Q3) joins with resistance (R1) end, resistance (R2) other end; The positive pole of diode (D5) and diode (D1) negative pole, diode (D2) negative pole, electric capacity (C1) positive pole, resistance (R1) other end join, and the negative pole of diode (D5) and LED lamp positive pole, electric capacity (C2) positive pole, resistance (R3) other end join; AC220V civil power one utmost point is anodal by cartridge fuse (BX) and diode (D1), diode (D3) negative pole joins, and another utmost point of AC220V civil power and diode (D2) are anodal, diode (D4) negative pole joins.
2. soft start protecting against shock LED constant current illuminating lamp drive circuit according to claim 1 is characterized in that: transistor (Q2), resistance (R3) and electric capacity (C3) are formed soft starting circuit.
3. soft start protecting against shock LED constant current illuminating lamp drive circuit according to claim 1 is characterized in that: the circuit that transistor (Q3), resistance (R1), resistance (R2) and electric capacity (C1) are formed, (C3) provides the path of releasing for electric capacity.
4. soft start protecting against shock LED constant current illuminating lamp drive circuit according to claim 1 is characterized in that: transistor (Q1), three ends are adjustable shunting a reference source (IC1), resistance (R3) and resistance (R4) are formed constant-current circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010546466 CN101977474B (en) | 2010-11-16 | 2010-11-16 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010546466 CN101977474B (en) | 2010-11-16 | 2010-11-16 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
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| CN101977474A true CN101977474A (en) | 2011-02-16 |
| CN101977474B CN101977474B (en) | 2013-03-13 |
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| CN 201010546466 Expired - Fee Related CN101977474B (en) | 2010-11-16 | 2010-11-16 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570400A (en) * | 2012-03-13 | 2012-07-11 | 中国矿业大学 | Intrinsically safe high-power switch converter output short-circuit protection device and method |
| CN103068107A (en) * | 2012-11-08 | 2013-04-24 | 陈盛文 | Light-emitting diode (LED) drive circuit |
| CN106455221A (en) * | 2016-10-27 | 2017-02-22 | 江苏吉泰科电气股份有限公司 | Vehicle-mounted lighting headlight driver |
| CN106998150A (en) * | 2017-04-14 | 2017-08-01 | 济南浪潮高新科技投资发展有限公司 | A kind of constant-current source and implementation method suppressed based on transient state with soft start |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201563268U (en) * | 2009-11-04 | 2010-08-25 | 河源市超越光电科技有限公司 | Drive circuit for OLED lamp |
| CN201869414U (en) * | 2010-11-16 | 2011-06-15 | 山东华盈电力能源发展有限公司 | Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps |
-
2010
- 2010-11-16 CN CN 201010546466 patent/CN101977474B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201563268U (en) * | 2009-11-04 | 2010-08-25 | 河源市超越光电科技有限公司 | Drive circuit for OLED lamp |
| CN201869414U (en) * | 2010-11-16 | 2011-06-15 | 山东华盈电力能源发展有限公司 | Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570400A (en) * | 2012-03-13 | 2012-07-11 | 中国矿业大学 | Intrinsically safe high-power switch converter output short-circuit protection device and method |
| CN102570400B (en) * | 2012-03-13 | 2015-08-19 | 中国矿业大学 | A kind of intrinsic safety type high power switch converter output short-circuit protection method |
| CN103068107A (en) * | 2012-11-08 | 2013-04-24 | 陈盛文 | Light-emitting diode (LED) drive circuit |
| CN106455221A (en) * | 2016-10-27 | 2017-02-22 | 江苏吉泰科电气股份有限公司 | Vehicle-mounted lighting headlight driver |
| CN106998150A (en) * | 2017-04-14 | 2017-08-01 | 济南浪潮高新科技投资发展有限公司 | A kind of constant-current source and implementation method suppressed based on transient state with soft start |
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| CN101977474B (en) | 2013-03-13 |
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Owner name: FANG LIN Free format text: FORMER OWNER: SHANDONG HUAYING ELECTRIC POWER DEVELOPMENT CO., LTD. Effective date: 20110708 Owner name: LU HUISHUI |
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Free format text: CORRECT: INVENTOR; FROM: FANG LIN LU HUISHUI LI YUNDONG TO: FANG LIN LU HUISHUI Free format text: CORRECT: ADDRESS; FROM: 250100 ROOM 508, BUILDING 2, OVERSEAS STUDENTS VENTURE PARK, NO. 19, HUANENG ROAD, LICHENG DISTRICT, JI'NAN CITY, SHANDONG PROVINCE TO: 250011 3-3-201, NO. 5, DESHENG SOUTH STREET, SHIZHONG DISTRICT, JI'NAN CITY, SHANDONG PROVINCE |
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Effective date of registration: 20110708 Address after: 250011, 3-3-201, 5 South victory Street, Shizhong District, Shandong, Ji'nan Applicant after: Fang Lin Co-applicant after: Lu Huishui Address before: 508, room 2, building 19, Pioneer Park, No. 250100 Huaneng Road, Licheng District, Shandong, Ji'nan Applicant before: Shandong Huaying Electric Power Development Co., Ltd. |
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Application publication date: 20110216 Assignee: SHANDONG INLARIN TECHNOLOGY CO., LTD. Assignor: Fang Lin|Lu Huishui Contract record no.: 2015370000011 Denomination of invention: Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance Granted publication date: 20130313 License type: Exclusive License Record date: 20150127 |
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