CN204104200U - A kind of Novel light-operated LED drive circuit - Google Patents
A kind of Novel light-operated LED drive circuit Download PDFInfo
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- CN204104200U CN204104200U CN201420674467.XU CN201420674467U CN204104200U CN 204104200 U CN204104200 U CN 204104200U CN 201420674467 U CN201420674467 U CN 201420674467U CN 204104200 U CN204104200 U CN 204104200U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model discloses a kind of Novel light-operated LED drive circuit, comprises driving power circuit and optically controlled delay circuit, and driving power circuit is former limit reaction type constant current driver circuit for LED, and circuit is simple, can export constant current; The power output end of driving power circuit is connected with the power input of optically controlled delay circuit, optically controlled delay circuit comprises photo resistance, monostable flipflop and switching device, the trigger input of single-shot trigger circuit is connected with photo resistance, and the output of single-shot trigger circuit is connected with the input of switching device; The resistance of photo resistance is followed the change of the luminous intensity of external environment and changes: on daytime, its resistance is very little, switching device not conducting, and LED light source extinguishes; Darkness, its resistance increases, and the output of monostable flipflop exports high level, and switching device is triggered conducting, and LED light source lights; Realize LED lamp automatic distinguishing on daytime, darkness lights automatically, energy savings, easy to use.
Description
Technical field
The utility model relates to field of LED drive, particularly a kind of Novel light-operated LED drive circuit.
Background technology
LED illumination is a kind of new type light source of rapid rising development in recent years, and its many good feature makes its application surface more and more wider.Because light fixture is all generally close daytime, night opens, so occur can with the light-controlled lamp of external environment light by current turns ON or disconnection.The existing light fixture with light control functionality is traditional incandescent lamp, unilateal conduction characteristic due to LED makes LED must be equipped with LED drive circuit could to work, therefore how light control functionality is applied in LED lamp, and simplify its circuit, be technical problem to be solved in the utility model.
summary of the invention
Main purpose of the present utility model is to provide a kind of Novel light-operated LED drive circuit, is intended to simplify circuit, realizes the light control functionality of LED lamp, intelligent-induction environment bright secretly can change, accurate delay timing, and export constant current, control LED bright, go out, easy to use.
The utility model proposes a kind of Novel light-operated LED drive circuit, comprise driving power circuit and optically controlled delay circuit, described driving power circuit is former limit reaction type constant current driver circuit for LED, comprise current rectifying and wave filtering circuit, the power transformer be connected with the output of described current rectifying and wave filtering circuit and former limit and feed back LED constant current driving chip, the output of described former limit feedback LED constant current driving chip is connected with the input of described power transformer, and the output of described power transformer is the power output end of described driving power circuit, the power output end of described driving power circuit is connected with the power input of described optically controlled delay circuit, described optically controlled delay circuit comprises photo resistance, monostable flipflop and switching device, the trigger input of described single-shot trigger circuit is connected with described photo resistance, the output of described single-shot trigger circuit is connected with the input of described switching device, the signal output part of described switching device connects controlled LED light source preferably, the RC timing circuit that described monostable flipflop comprises NE555 chip and is made up of timing capacitor and timing resistor, power output end described in one termination of described timing resistor, the other end of described timing resistor is connected with the positive pole of described timing capacitor, the minus earth line of described timing capacitor, 1 pin of described NE555 chip is earth terminal, earth connection, 2 pin of described NE555 chip are trigger input, connect described photo resistance, 3 pin of described NE555 chip are output, connect described switching device, 4 pin of described NE555 chip are reset terminal, and 8 pin of described NE555 chip are power voltage terminal, and 4 pin of described NE555 chip and 8 pin connect the power output end of described driving power circuit jointly, 5 pin of described NE555 chip are control end, with described earth terminal common ground line, 6 pin of described NE555 chip are threshold value end, and 7 pin of described NE555 chip are discharge end, and 6 pin and 7 pin of described NE555 chip are attempted by described timing capacitor, are connected between described timing resistor and described timing capacitor.
Preferably, described switching device is switch triode, and 3 pin of described NE555 chip are connected with the base stage of described switch triode through a resistance R11, the transmitting collection earth connection of described switch triode, the current collection very signal output part of described switch triode, is connected with controlled LED light source.
Preferably, described switching device is thyristor, and 3 pin of described NE555 chip are connected with the control pole of described thyristor through a resistance R11, the minus earth line of described thyristor, and the anode of described thyristor is signal output part, is connected with controlled LED light source.
Preferably, described optically controlled delay circuit comprises voltage stabilizing circuit, and described voltage stabilizing circuit comprises voltage stabilizing didoe and electric capacity C9, the plus earth of described voltage stabilizing didoe, negative pole connects the power output end of described driving power circuit, and described electric capacity C9 is connected in parallel on described voltage stabilizing didoe two ends.
Preferably, described former limit feedback LED constant current driving chip is BP9022A chip, inside comprises LED open loop protection circuit, LED short-circuit protection circuit, CS end resistive short protective circuit, power supply under-voltage protecting circuit and the overheated regulating circuit of chip temperature, 1 pin of described BP9022A chip is current sample end CS, meets sampling resistor R3 to ground wire; 2 pin of described BP9022A chip are chip power supply end VDD, are connected with the output of described current rectifying and wave filtering circuit; 3 pin of described BP9022A chip are earth terminal GND, earth connection; 4 pin of described BP9022A chip are that LED open-circuit-protection voltage arranges end ROVP, and connecting resistance R2 is to ground wire; 5 pin of described BP9022A chip and 6 pin are empty pin NC, and 7 pin of described BP9022A chip and 8 pin are internal high pressure power tube drain terminal DRAIN, i.e. output, connects the input of described power transformer.
Beneficial effect
The beneficial effect of a kind of Novel light-operated LED drive circuit of the present utility model is:
1, adopt former limit reaction type constant current driver circuit for LED to carry out constant current-supplying, adopt the optically controlled delay circuit be made up of photo resistance, monostable flipflop and switching device, circuit is simple, and volume is little; The resistance of photo resistance is followed the change of the luminous intensity of external environment and changes: daytime, when there being illumination to be mapped to photo resistance, its resistance very little (about tens K), the now trigger input input high level of monostable flipflop, be not triggered, its output output low level, switching device not conducting, controlled LED light source is in turn-off; Darkness, when photo resistance does not have illumination, its resistance increases, the now trigger input input low level of monostable flipflop, monostable flipflop to be triggered upset by 2 pin, and its output exports high level, switching device is triggered conducting, and controlled LED light source lights; Realize LED lamp automatic distinguishing on daytime, darkness lights automatically, energy savings, easy to use.
2, monostable flipflop is triggered after upset and enters temporary stable state, and at this moment power supply is charged to timing capacitor by timing resistor, and the time needed for timing capacitor charging is the delay time of monostable flipflop, can realize accurate delay timing.
3, former limit reaction type constant current driver circuit for LED is adopted to carry out constant current-supplying, the feedback LED constant current driving chip inside, former limit used is integrated with 600V power switch, only need the constant-current characteristics that few peripheral assembly just can reach excellent, and have employed former limit feedback technique, without the need to optocoupler and TL431 feedback, also without the need to auxiliary winding power and detection, system cost is extremely low.
Former limit feedback LED constant current driving chip also has LED open circuit/short-circuit protection function, CS resistive short defencive function, VDD under-voltage protection function and the overheated regulatory function of chip temperature, can carry out multiple protective to whole circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of driving power circuit in the embodiment of a kind of Novel light-operated LED drive circuit of the present utility model;
Fig. 2 is the circuit diagram of optically controlled delay circuit in the embodiment of a kind of Novel light-operated LED drive circuit of the present utility model.
The realization of the utility model object, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
See figures.1.and.2, one embodiment of a kind of Novel light-operated LED drive circuit of the present utility model is proposed, this Novel light-operated LED drive circuit comprises driving power circuit and optically controlled delay circuit, and driving power circuit is optically controlled delay circuit and LED light source circuit supply.This driving power circuit is former limit reaction type constant current driver circuit for LED, comprise current rectifying and wave filtering circuit, the power transformer T7 be connected with the output of current rectifying and wave filtering circuit and former limit and feed back LED constant current driving chip, the output of former limit feedback LED constant current driving chip is connected with the input of power transformer T7, and the output of power transformer T7 is the power output end of driving power circuit.
This current rectifying and wave filtering circuit comprises the rectifier bridge D1 and filter capacitor C4 that are made up of four diodes, and filter capacitor C4 is connected in parallel on the output of rectifier bridge D1.Connect after AC power, alternating current through fuse resistance R1 input rectifying bridge D1, after rectifier bridge D1 rectification, then through filter capacitor C4 filtering, the direct current of output smoothing.Electric capacity C3 is also parallel with, for filter high-frequency AC signal at the two ends of filter capacitor C4.
This former limit feedback LED constant current driving chip is BP9022A chip JP1, chip internal is integrated with 600V power switch, only need the constant-current characteristics that few peripheral assembly just can reach excellent, and have employed former limit feedback technique, without the need to optocoupler and TL431 feedback, also without the need to auxiliary winding power and detection, system cost is extremely low.
1 pin of BP9022A chip JP1 is current sample end CS, meets sampling resistor R3 to ground wire; 2 pin of BP9022A chip JP1 are chip power supply end VDD, are connected with the output of current rectifying and wave filtering circuit; 3 pin of BP9022A chip JP1 are earth terminal GND, earth connection; 4 pin of BP9022A chip JP1 are that LED open-circuit-protection voltage arranges end ROVP, and connecting resistance R2 is to ground wire; 5 pin of BP9022A chip JP1 and 6 pin are 7 pin of empty pin NC, BP9022A chip JP1 and 8 pin is internal high pressure power tube drain terminal DRAIN, i.e. output, connects the input of power transformer T7.
BP9022A chip JP1 inside also comprises LED open loop protection circuit, LED short-circuit protection circuit, CS end resistive short protective circuit, power supply under-voltage protecting circuit and the overheated regulating circuit of chip temperature; there is LED open circuit/short-circuit protection function, CS resistive short defencive function, VDD under-voltage protection function and the overheated regulatory function of chip temperature, multiple protective can be carried out to whole circuit.
When exporting LED light source open circuit, BP9022A chip JP1 system can trigger overvoltage relay protective scheme and shutdown switch work.When LED light source short circuit, system works is at 5KHz low frequency, and CS turns off threshold value and is reduced to 200mV, so power consumption is very low.When the situation of some exception occurs, the such as short circuit of CS sampling resistor or transformer T7 are saturated, and the quick detection circuit meeting trigger protection logic of chip internal, system is shutdown switch work at once.After system enters guard mode, vdd voltage starts to decline; When VDD arrives under-voltage protection threshold value, system will be restarted.Simultaneity factor constantly detects load condition, if trouble shooting, system can restart normal work.When driving power circuit is overheated, BP9022A chip JP1 can reduce output current gradually, thus controls power output and temperature rise, makes power source temperature remain on set point, to improve the reliability of system.It is 150 DEG C that chip internal set thermal conditioning temperature spot.
The power output end of driving power circuit is connected with the power input of optically controlled delay circuit.Optically controlled delay circuit comprises photo resistance R10, monostable flipflop and switching device, the trigger input of single-shot trigger circuit is connected with photo resistance R10, the output of single-shot trigger circuit is connected with the input of switching device, and the signal output part of switching device connects controlled LED light source.
The RC timing circuit that this monostable flipflop comprises NE555 chip JP2 and is made up of timing capacitor C8 and timing resistor R12, the power output end of the one termination driving power circuit of timing resistor R12, the other end of timing resistor R12 is connected with the positive pole of timing capacitor C8, the minus earth line of timing capacitor C8.1 pin of NE555 chip JP2 is earth terminal, earth connection; 2 pin of NE555 chip JP2 are trigger input, meet photo resistance R10; 3 pin of NE555 chip JP2 are output, connect switching device; 4 pin of NE555 chip JP2 are reset terminal, and 8 pin of NE555 chip JP2 are power voltage terminal, and 4 pin of NE555 chip JP2 and 8 pin connect the power output end of driving power circuit jointly; 5 pin of NE555 chip JP2 are control end, with earth terminal common ground line; 6 pin of NE555 chip JP2 are threshold value end, and 7 pin of NE555 chip JP2 are discharge end, and 6 pin and 7 pin of NE555 chip JP2 are attempted by timing capacitor C8, are connected between timing resistor R12 and timing capacitor C8.
In the present embodiment, switching device is that 3 pin of thyristor Q1, NE555 chip JP2 are connected with the control pole of thyristor Q1 through a resistance R11, and the minus earth line of thyristor Q1, the anode of thyristor Q1 is signal output part, is connected with controlled LED light source.
The resistance of photo resistance R10 is followed the change of the luminous intensity of external environment and changes: daytime, when there being illumination to be mapped to photo resistance R10, its resistance very little (about tens K), the now trigger input input high level of monostable flipflop, be not triggered, its output output low level, thyristor Q1 not conducting, controlled LED light source is in turn-off; Darkness, when photo resistance R10 does not have illumination, its resistance increases, the now trigger input input low level of monostable flipflop, monostable flipflop to be triggered upset by 2 pin, and its output exports high level, thyristor Q1 is triggered conducting, and controlled LED light source lights; Realize LED lamp automatic distinguishing on daytime, darkness lights automatically, energy savings, easy to use.
Certainly, switching device also can be set to switch triode, and 3 pin of NE555 chip JP2 are connected with the base stage of switch triode through resistance R11, the transmitting collection earth connection of switch triode, and the current collection very signal output part of switch triode, is connected with controlled LED light source.Its control principle and thyristor Q1 similar.
Monostable flipflop is triggered after upset and enters temporary stable state, and at this moment power supply is by timing resistor R12 to timing capacitor C8 charging, and the time needed for timing capacitor C8 charging is the delay time of monostable flipflop, can realize accurate delay timing.
This optically controlled delay circuit also comprises voltage stabilizing circuit, and voltage stabilizing circuit comprises voltage stabilizing didoe D4 and electric capacity C9, the plus earth of voltage stabilizing didoe D4, and negative pole connects the power output end of driving power circuit, and electric capacity C9 is connected in parallel on voltage stabilizing didoe D4 two ends.
This Novel light-operated LED drive circuit adopts former limit reaction type constant current driver circuit for LED to carry out constant current-supplying, adopts the optically controlled delay circuit be made up of photo resistance R10, monostable flipflop and switching device, and circuit is simple, and volume is little, controls stable.
The foregoing is only preferred embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. a Novel light-operated LED drive circuit, comprise driving power circuit and optically controlled delay circuit, it is characterized in that, described driving power circuit is former limit reaction type constant current driver circuit for LED, comprise current rectifying and wave filtering circuit, the power transformer be connected with the output of described current rectifying and wave filtering circuit and former limit and feed back LED constant current driving chip, the output of described former limit feedback LED constant current driving chip is connected with the input of described power transformer, and the output of described power transformer is the power output end of described driving power circuit; The power output end of described driving power circuit is connected with the power input of described optically controlled delay circuit, described optically controlled delay circuit comprises photo resistance, monostable flipflop and switching device, the trigger input of described single-shot trigger circuit is connected with described photo resistance, the output of described single-shot trigger circuit is connected with the input of described switching device, and the signal output part of described switching device connects controlled LED light source.
2. a kind of Novel light-operated LED drive circuit according to claim 1, it is characterized in that, the RC timing circuit that described monostable flipflop comprises NE555 chip and is made up of timing capacitor and timing resistor, power output end described in one termination of described timing resistor, the other end of described timing resistor is connected with the positive pole of described timing capacitor, the minus earth line of described timing capacitor; 1 pin of described NE555 chip is earth terminal, earth connection; 2 pin of described NE555 chip are trigger input, connect described photo resistance; 3 pin of described NE555 chip are output, connect described switching device; 4 pin of described NE555 chip are reset terminal, and 8 pin of described NE555 chip are power voltage terminal, and 4 pin of described NE555 chip and 8 pin connect the power output end of described driving power circuit jointly; 5 pin of described NE555 chip are control end, with described earth terminal common ground line; 6 pin of described NE555 chip are threshold value end, and 7 pin of described NE555 chip are discharge end, and 6 pin and 7 pin of described NE555 chip are attempted by described timing capacitor, are connected between described timing resistor and described timing capacitor.
3. a kind of Novel light-operated LED drive circuit according to claim 2, it is characterized in that, described switching device is switch triode, 3 pin of described NE555 chip are connected with the base stage of described switch triode through a resistance R11, the transmitting collection earth connection of described switch triode, the current collection very signal output part of described switch triode, is connected with controlled LED light source.
4. a kind of Novel light-operated LED drive circuit according to claim 2, it is characterized in that, described switching device is thyristor, 3 pin of described NE555 chip are connected with the control pole of described thyristor through a resistance R11, the minus earth line of described thyristor, the anode of described thyristor is signal output part, is connected with controlled LED light source.
5. a kind of Novel light-operated LED drive circuit according to any one of Claims 1-4, it is characterized in that, described optically controlled delay circuit comprises voltage stabilizing circuit, described voltage stabilizing circuit comprises voltage stabilizing didoe and electric capacity C9, the plus earth of described voltage stabilizing didoe, negative pole connects the power output end of described driving power circuit, and described electric capacity C9 is connected in parallel on described voltage stabilizing didoe two ends.
6. a kind of Novel light-operated LED drive circuit according to claim 1, it is characterized in that, described former limit feedback LED constant current driving chip is BP9022A chip, inside comprises LED open loop protection circuit, LED short-circuit protection circuit, CS end resistive short protective circuit, power supply under-voltage protecting circuit and the overheated regulating circuit of chip temperature, 1 pin of described BP9022A chip is current sample end CS, meets sampling resistor R3 to ground wire; 2 pin of described BP9022A chip are chip power supply end VDD, are connected with the output of described current rectifying and wave filtering circuit; 3 pin of described BP9022A chip are earth terminal GND, earth connection; 4 pin of described BP9022A chip are that LED open-circuit-protection voltage arranges end ROVP, and connecting resistance R2 is to ground wire; 5 pin of described BP9022A chip and 6 pin are empty pin NC, and 7 pin of described BP9022A chip and 8 pin are internal high pressure power tube drain terminal DRAIN, i.e. output, connects the input of described power transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420674467.XU CN204104200U (en) | 2014-11-13 | 2014-11-13 | A kind of Novel light-operated LED drive circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420674467.XU CN204104200U (en) | 2014-11-13 | 2014-11-13 | A kind of Novel light-operated LED drive circuit |
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| CN204104200U true CN204104200U (en) | 2015-01-14 |
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| CN201420674467.XU Expired - Fee Related CN204104200U (en) | 2014-11-13 | 2014-11-13 | A kind of Novel light-operated LED drive circuit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545754A (en) * | 2016-08-31 | 2017-03-29 | 杨小晨 | It is a kind of with light-operated LED light source device |
| CN106545784A (en) * | 2016-08-31 | 2017-03-29 | 唐艳军 | The LED projector lamp of constant-current driving |
| CN106545752A (en) * | 2016-08-31 | 2017-03-29 | 杨小晨 | A kind of LED light source device with driving |
| CN106545762A (en) * | 2016-08-31 | 2017-03-29 | 刘达 | A kind of light-operated LED lamp tube |
| CN106545798A (en) * | 2016-08-31 | 2017-03-29 | 陈磊 | The LED lamp affixed to the ceilings of constant-current driving |
| CN106560645A (en) * | 2016-08-31 | 2017-04-12 | 陈磊 | Strobe-free LED ceiling lamp |
| CN107277971A (en) * | 2017-06-16 | 2017-10-20 | 浙江阳光美加照明有限公司 | A kind of light-controlled switching circuit of LED |
| CN109769321A (en) * | 2019-03-15 | 2019-05-17 | 绍兴久芯电子科技有限公司 | A kind of LED lamp circuit with Delayed extinguishing function |
| CN113840426A (en) * | 2021-09-26 | 2021-12-24 | 赖微福 | LED advertising lamp control circuit |
| CN114430598A (en) * | 2021-12-27 | 2022-05-03 | 佛山电器照明股份有限公司 | LED light sense lamp control circuit and LED lamp |
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2014
- 2014-11-13 CN CN201420674467.XU patent/CN204104200U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545754A (en) * | 2016-08-31 | 2017-03-29 | 杨小晨 | It is a kind of with light-operated LED light source device |
| CN106545784A (en) * | 2016-08-31 | 2017-03-29 | 唐艳军 | The LED projector lamp of constant-current driving |
| CN106545752A (en) * | 2016-08-31 | 2017-03-29 | 杨小晨 | A kind of LED light source device with driving |
| CN106545762A (en) * | 2016-08-31 | 2017-03-29 | 刘达 | A kind of light-operated LED lamp tube |
| CN106545798A (en) * | 2016-08-31 | 2017-03-29 | 陈磊 | The LED lamp affixed to the ceilings of constant-current driving |
| CN106560645A (en) * | 2016-08-31 | 2017-04-12 | 陈磊 | Strobe-free LED ceiling lamp |
| CN107277971A (en) * | 2017-06-16 | 2017-10-20 | 浙江阳光美加照明有限公司 | A kind of light-controlled switching circuit of LED |
| CN107277971B (en) * | 2017-06-16 | 2023-08-29 | 浙江阳光美加照明有限公司 | Light-operated switch circuit of LED lamp |
| CN109769321A (en) * | 2019-03-15 | 2019-05-17 | 绍兴久芯电子科技有限公司 | A kind of LED lamp circuit with Delayed extinguishing function |
| CN109769321B (en) * | 2019-03-15 | 2021-01-12 | 绍兴久越电子科技有限公司 | LED lamp circuit with delayed light-off function |
| CN113840426A (en) * | 2021-09-26 | 2021-12-24 | 赖微福 | LED advertising lamp control circuit |
| CN114430598A (en) * | 2021-12-27 | 2022-05-03 | 佛山电器照明股份有限公司 | LED light sense lamp control circuit and LED lamp |
| WO2023123781A1 (en) * | 2021-12-27 | 2023-07-06 | 佛山电器照明股份有限公司 | Light-sensitive control circuit for led lamp, and led lamp |
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