CN201869414U - Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps - Google Patents
Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps Download PDFInfo
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- CN201869414U CN201869414U CN2010206092127U CN201020609212U CN201869414U CN 201869414 U CN201869414 U CN 201869414U CN 2010206092127 U CN2010206092127 U CN 2010206092127U CN 201020609212 U CN201020609212 U CN 201020609212U CN 201869414 U CN201869414 U CN 201869414U
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Abstract
The utility model relates to a soft-start impact-resistant LED constant-current driving circuit for illuminating lamps, which comprises a fuse tube BX, resistors (R1, R2, R3 and R4), diodes D1, D2, D3, D4 and D5), capacitors (C1, C2, C3, C4 and C5), crystal triodes (Q1, Q2 and Q3) and a three-terminal-adjustable shunt reference source IC1. A soft start circuit consists of the crystal triode Q2, the resistor R3 and the capacitor C3, a circuit is composed of the crystal triode Q3, the resistor R1, the resistor R2 and the capacitor C1 so as to provide a discharge channel for the capacitor C3, and a constant-current circuit comprises the crystal triode Q1, the three-terminal-adjustable shunt reference source IC1, the resistor R3 and the resistor R4. The LED constant-current illuminating circuit has the advantages of impact resistance and soft start, prolongs service lives of LEDs, and is ideal in effect after use.
Description
Technical field
The utility model belongs to lighting circuit drive controlling field, particularly relates 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.
The utility model content
The purpose of this utility model is to provide a kind of LED constant current illuminating lamp drive circuit, and 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 utility model 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 the utility model soft start protecting against shock LED constant current illuminating lamp drive circuit schematic diagram.
Embodiment
As shown in Figure 1, soft start protecting against shock LED constant current illuminating lamp drive circuit of the present utility model, 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 Ф 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 |
|---|---|---|---|
| CN2010206092127U CN201869414U (en) | 2010-11-16 | 2010-11-16 | Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206092127U CN201869414U (en) | 2010-11-16 | 2010-11-16 | Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201869414U true CN201869414U (en) | 2011-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206092127U Expired - Lifetime CN201869414U (en) | 2010-11-16 | 2010-11-16 | Soft-start impact-resistant LED constant-current driving circuit for illuminating lamps |
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| CN (1) | CN201869414U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977474A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
| CN106851883A (en) * | 2016-12-28 | 2017-06-13 | 广东格兰仕集团有限公司 | A kind of soft starting circuit and its method for becoming micro-wave oven |
-
2010
- 2010-11-16 CN CN2010206092127U patent/CN201869414U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101977474A (en) * | 2010-11-16 | 2011-02-16 | 山东华盈电力能源发展有限公司 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
| CN101977474B (en) * | 2010-11-16 | 2013-03-13 | 房林 | Drive circuit of light emitting diode (LED) constant current illuminating lamp with characteristics of soft start and shock resistance |
| CN106851883A (en) * | 2016-12-28 | 2017-06-13 | 广东格兰仕集团有限公司 | A kind of soft starting circuit and its method for becoming micro-wave oven |
| CN106851883B (en) * | 2016-12-28 | 2020-04-03 | 广东格兰仕集团有限公司 | Soft start circuit and method for variable frequency microwave oven |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LU HUISHUI Owner name: FANG LIN Free format text: FORMER OWNER: SHANDONG HUAYING ELECTRIC POWER DEVELOPMENT CO., LTD. Effective date: 20110708 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Fang Lin Inventor after: Lu Huishui Inventor before: Fang Lin Inventor before: Lu Huishui Inventor before: Li Yundong |
|
| COR | Change of bibliographic data |
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 NO. 401, UNIT 1, BUILDING 42, XIAOYUANZHUANG, LIXIA DISTRICT, JI NAN CITY, SHANDONG PROVINCE Free format text: CORRECT: INVENTOR; FROM: FANG LIN LU HUISHUI LI YUNDONG TO: FANG LIN LU HUISHUI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110708 Address after: Lixia District, Shandong city of Ji'nan Province, a small village 250011 building 42, unit 1, No. 401 Co-patentee after: Lu Huishui Patentee after: Fang Lin Address before: 508, room 2, building 19, Pioneer Park, No. 250100 Huaneng Road, Licheng District, Shandong, Ji'nan Patentee before: Shandong Huaying Electric Power Development Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110615 Effective date of abandoning: 20130313 |
|
| RGAV | Abandon patent right to avoid regrant |