CN104105245B - A kind of LED Drive Protecting Circuits - Google Patents
A kind of LED Drive Protecting Circuits Download PDFInfo
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- CN104105245B CN104105245B CN201310125482.9A CN201310125482A CN104105245B CN 104105245 B CN104105245 B CN 104105245B CN 201310125482 A CN201310125482 A CN 201310125482A CN 104105245 B CN104105245 B CN 104105245B
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Abstract
The embodiment of the invention discloses a kind of LED Drive Protecting Circuits, including electric pressure converter U1, triode Q1, diode D1, D2, D3, D4, relay K1, rectifier bridge BD, thermistor RT, resistance R1；1st pin of the pin of U1 the 1st respectively with the pin of BD the 2nd, RT one end and K1 is connected；The pin of U1 the 2nd are connected with the pin of BD the 4th, D3 negative poles, Q1 emitter stages and power supply respectively；The pin of U1 the 3rd are connected with R1 one end, D4 negative poles and the pin of K1 the 2nd respectively；Q1 base stages are connected with the R1 other ends and D1 positive poles respectively；Q1 colelctor electrodes are connected with D4 positive poles and the pin of K1 the 4th respectively；D1 negative poles are connected with D2 positive poles；D2 negative poles are connected with D3 positive poles；The pin of K1 the 3rd are connected with the RT other ends and light source driving circuit respectively.The embodiment of the present invention has simple in construction, easy to control, the advantages of cost is cheap.
Description
Technical field
The present invention relates to illumination driving protection field, more particularly to a kind of LED Drive Protecting Circuits.
Background technology
Documents exchange a kind of LED drive power circuit（Chinese Patent Application No. 201220233898.3）, the present invention
A kind of LED drive power circuit, including be connected with each other successively surge protection circuit, input rectifying filter circuit, power become
Change circuit and rectifying output circuit.The LED drive power circuit also includes the PWM control electricity being connected with power conversion circuit
Road, the feedback circuit being connected with current rectifying and wave filtering circuit and pwm control circuit, controlled with input rectifying filter circuit and PWM
The pfc circuit of circuit, the LED drive power circuit also include input overvoltage/under-voltage protecting circuit and output protection circuit.
Foregoing circuit device is more, and circuit is more complicated, and cost is higher.
The content of the invention
Technical problem to be solved of the embodiment of the present invention is, there is provided a kind of LED Drive Protecting Circuits.Can reach has
Effect prevents surge voltage from burning rear class switching tube, and itself absorbs the purpose that surge component has also obtained fine protection.
In order to solve the above-mentioned technical problem, the embodiments of the invention provide a kind of LED Drive Protecting Circuits, including voltage to turn
Parallel operation U1, triode Q1, diode D1, D2, D3, D4, relay K1, rectifier bridge BD, thermistor RT, resistance R1；The pin of U1 the 1st
The 1st pin with the pin of BD the 2nd, RT one end and K1 is connected respectively；The pin of U1 the 2nd respectively with the pin of BD the 4th, D3 negative poles, Q1 emitter stages with
And power supply connect；The pin of U1 the 3rd are connected with R1 one end, D4 negative poles and the pin of K1 the 2nd respectively；Q1 base stages respectively with the R1 other ends with
And D1 positive poles connection；Q1 colelctor electrodes are connected with D4 positive poles and the pin of K1 the 4th respectively；D1 negative poles are connected with D2 positive poles；D2 negative poles with
D3 positive poles connect；The pin of K1 the 3rd are connected with the RT other ends and light source driving circuit respectively；The pin of BD the 1st connect with exchanging input one end
Connect；The pin of BD the 3rd are connected with the exchange input other end.
Further, in addition to electric capacity C1, C2；C1 positive poles respectively with the pin of U1 the 1st, the pin of BD the 2nd, RT one end and K1
1 pin connects；C1 negative poles are connected with the pin of U1 the 2nd, the pin of BD the 4th, D3 negative poles, C2 negative poles, Q1 emitter stages and power supply respectively；C2 is just
Pole is connected with R1 one end, D1 positive poles and Q1 base stages respectively.
Further, moment is electrically connected in exchange, surge voltage is very big, easily burns the switching tube of rear class driving, temperature-sensitive
Resistance RT1 falls peak voltage in unlatching transient absorption, forms protection.
Further, it is high voltage direct current after alternating current is filtered by rectifier bridge rectification C1, is turned by electric pressure converter U1
Relay 12V operating voltages are changed to, are exported from U1 the 3rd pin, are charged by R1 for electric capacity, C2 can be considered short circuit when charging starts
State, now Q1 base stages are low level, and as C2 both end voltages raise, Q1 base voltages are changed into high level, Q1 conductings, relay
Adhesive, RT, which is short-circuited, to be stopped, and prevents RT overheats from burning, and now Q1 base voltages are left in 2V by D1, D2, D3 forward conduction
The right side, Q1 is promoted to turn on always, RT1 is protected by K1 short circuits.
Further, U1 models SPA-220S15W, Q1 model s8050, D1 model IN4001, the D2 model
For IN4001, D3 models IN4001, D4 model US1D.
Further, BD models MT3516, the K1 model GB-1C-12L.
Implement the embodiment of the present invention, have the advantages that：The present invention, which can reach, effectively prevents surge voltage from burning
Rear class switching tube is ruined, itself absorbs the purpose that surge component has also obtained fine protection, and simple in construction, controlling party
Just, cost is cheap.
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 required accompanying drawing used 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 a kind of schematic diagram of LED Drive Protecting Circuits of the present invention.
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 describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
It refer to Fig. 1, a kind of LED Drive Protecting Circuits, including electric pressure converter U1, triode Q1, diode D1, D2,
D3, D4, relay K1, rectifier bridge BD, thermistor RT, resistance R1；The pin of U1 the 1st respectively with the pin of BD the 2nd, RT one end and K1
1st pin connects；The pin of U1 the 2nd are connected with the pin of BD the 4th, D3 negative poles, Q1 emitter stages and power supply respectively；The pin of U1 the 3rd respectively with R1
One end, D4 negative poles and the connection of the pin of K1 the 2nd；Q1 base stages are connected with the R1 other ends and D1 positive poles respectively；Q1 colelctor electrodes respectively with
D4 positive poles and the connection of the pin of K1 the 4th；D1 negative poles are connected with D2 positive poles；D2 negative poles are connected with D3 positive poles；The pin of K1 the 3rd are another with RT respectively
One end and light source driving circuit connection；The pin of BD the 1st are connected with exchange input one end；The pin of BD the 3rd connect with exchanging the input other end
Connect.
Also include electric capacity C1, C2；1st pin of the C1 positive poles respectively with the pin of U1 the 1st, the pin of BD the 2nd, RT one end and K1 is connected；
C1 negative poles are connected with the pin of U1 the 2nd, the pin of BD the 4th, D3 negative poles, C2 negative poles, Q1 emitter stages and power supply respectively；C2 positive poles respectively with
R1 one end, D1 positive poles and the connection of Q1 base stages.
Moment is electrically connected in exchange, surge voltage is very big, easily burns the switching tube of rear class driving, and thermistor RT1 exists
Open transient absorption and fall peak voltage, form protection.
Alternating current is high voltage direct current after being filtered by rectifier bridge rectification C1, and relay is converted to by electric pressure converter U1
12V operating voltages, export, charged by R1 for electric capacity, C2 can be considered short-circuit condition when charging starts, now from U1 the 3rd pin
Q1 base stages are low level, and as C2 both end voltages raise, Q1 base voltages are changed into high level, Q1 conductings, relay adhesive, RT quilts
Short circuit is stopped, and prevents RT overheats from burning, now Q1 base voltages promote always by D1, D2, D3 forward conduction in 2V or so
Q1 is turned on, and RT1 is protected by K1 short circuits.
U1 models SPA-220S15W, Q1 model s8050, D1 model IN4001, D2 the model IN4001,
D3 models IN4001, D4 model US1D.
BD models MT3516, the K1 model GB-1C-12L.
The present invention can reach as the change of external voltage causes the light and shade of light fixture light to control phototriode
The change of resistance value, the ON time of IGCT is controlled by controlling single-phase transistor phase place change, it is steady to reach lamp lighting
Fixed purpose, and it is simple in construction, and easy to control, cost is cheap.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with
The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Dish, CD, read-only memory（Read-Only Memory, ROM）Or random access memory（Random Access
Memory, RAM）Deng.
Above disclosure is only preferred embodiment of present invention, can not limit the right model of the present invention with this certainly
Enclose, therefore the equivalent variations made according to the claims in the present invention, still belong to the scope that the present invention is covered.
Claims (3)
- A kind of 1. LED Drive Protecting Circuits, it is characterised in that including electric pressure converter U1, triode Q1, diode D1, D2, D3, D4, relay K1, rectifier bridge BD, thermistor RT, resistance R1；U1 input pins respectively with the pin of BD the 2nd, RT one end and K1 Controlled switch a pin connection；U1 grounding legs are connected with the pin of BD the 4th, D3 negative poles, Q1 emitter stages and power supply respectively；U1 is defeated Go out a pin of the pin respectively with R1 one end, D4 negative poles and K1 relay coils to be connected；Q1 base stages respectively with the R1 other ends and D1 Positive pole connects；Another pin of the Q1 colelctor electrodes respectively with D4 positive poles and K1 relay coils is connected；D1 negative poles are connected with D2 positive poles； D2 negative poles are connected with D3 positive poles；Another pin of K1 controlled switch is connected with the RT other ends and light source driving circuit respectively；BD the 1st Pin is connected with exchange input one end；The pin of BD the 3rd are connected with the exchange input other end；Also include electric capacity C1, C2；C1 positive poles connect with a pin of U1 input pins, the pin of BD the 2nd, RT one end and K1 controlled switch respectively Connect；C1 negative poles are connected with U1 grounding legs, the pin of BD the 4th, D3 negative poles, C2 negative poles, Q1 emitter stages and power supply respectively；C2 positive poles point It is not connected with the R1 other ends, D1 positive poles and Q1 base stages；Alternating current is high voltage direct current after being filtered by rectifier bridge rectification C1, and relay 12V is converted to by electric pressure converter U1 Operating voltage, export, charged by R1 for electric capacity C2, C2 can be considered short-circuit condition when charging starts, now from U1 output pin Q1 base stages are low level, and as C2 both end voltages raise, Q1 base voltages are changed into high level, Q1 conductings, relay adhesive, RT quilts Short circuit is stopped, and prevents RT overheats from burning, now Q1 base voltages promote always by D1, D2, D3 forward conduction in 2V or so Q1 is turned on, and RT is protected by K1 short circuits；Moment is electrically connected in exchange, surge voltage is very big, easily burns the switching tube of rear class driving, and thermistor RT is opening wink Between sponge peak voltage, form protection.
- 2. LED Drive Protecting Circuits according to claim 1, it is characterised in that the U1 models SPA-220S15W, Q1 models s8050, D1 model IN4001, D2 model IN4001, D3 model IN4001, D4 model US1D.
- 3. LED Drive Protecting Circuits according to claim 1, it is characterised in that BD models MT3516, the K1 model For GB-1C-12L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310125482.9A CN104105245B (en) | 2013-04-11 | 2013-04-11 | A kind of LED Drive Protecting Circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310125482.9A CN104105245B (en) | 2013-04-11 | 2013-04-11 | A kind of LED Drive Protecting Circuits |
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| Publication Number | Publication Date |
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| CN104105245A CN104105245A (en) | 2014-10-15 |
| CN104105245B true CN104105245B (en) | 2017-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310125482.9A Active CN104105245B (en) | 2013-04-11 | 2013-04-11 | A kind of LED Drive Protecting Circuits |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915797B (en) * | 2017-12-11 | 2021-11-30 | 朗德万斯公司 | Electronic driver for LED lighting module and LED lamp |
| CN110071559A (en) * | 2019-05-05 | 2019-07-30 | 维沃移动通信有限公司 | A kind of charging circuit and mobile terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497461Y (en) * | 2001-08-07 | 2002-06-26 | 刘建华 | No-power consumption motor comprehensive protector |
| CN102354965A (en) * | 2011-10-14 | 2012-02-15 | 江苏普明商贸有限公司 | Novel surge control circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2327275B1 (en) * | 2008-08-19 | 2016-02-10 | Nxp B.V. | A surge protection circuit having serially connected series switches |
| CN102480815B (en) * | 2010-11-23 | 2015-07-08 | 海洋王照明科技股份有限公司 | LED (light emitting diode) dimming drive circuit |
| CN103166213A (en) * | 2013-01-31 | 2013-06-19 | 佛山市华全电气照明有限公司 | Anti-surge circuit of power supply of control circuit |
-
2013
- 2013-04-11 CN CN201310125482.9A patent/CN104105245B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2497461Y (en) * | 2001-08-07 | 2002-06-26 | 刘建华 | No-power consumption motor comprehensive protector |
| CN102354965A (en) * | 2011-10-14 | 2012-02-15 | 江苏普明商贸有限公司 | Novel surge control circuit |
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| Publication number | Publication date |
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| CN104105245A (en) | 2014-10-15 |
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