CN104768282A - LED drive control circuit for switch dimming - Google Patents
LED drive control circuit for switch dimming Download PDFInfo
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- CN104768282A CN104768282A CN201510092672.4A CN201510092672A CN104768282A CN 104768282 A CN104768282 A CN 104768282A CN 201510092672 A CN201510092672 A CN 201510092672A CN 104768282 A CN104768282 A CN 104768282A
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- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 8
- 238000004146 energy storage Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005669 field effect Effects 0.000 claims description 3
- 210000003127 knee Anatomy 0.000 claims description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses an LED drive control circuit for switch dimming. The LED drive control circuit comprises a bridge rectifier circuit and an LED drive control circuit unit, wherein the bridge rectifier circuit is connected with a high-voltage filter capacitor, a first resistor and an LED drive circuit in parallel, the first resistor is connected with a second resistor in series, the second resistor is grounded through a third resistor, the second resistor is connected with the third resistor through the LED drive control circuit unit, the LED drive control circuit unit is connected with the grid of a power tube, and the source of the power tube source is grounded through a fourth resistor. The LED drive control circuit for switch dimming has low overall plan cost, and is small in size, simple and practical in structure, stable and reliable in working performance and wide in application range.
Description
Technical field
The present invention relates to intelligent LED light adjusting circuit, specifically refers to a kind ofly detect urban electric power switch thus realize LED Drive and Control Circuit and the driving circuit structure thereof of different output current.
Background technology
The advantages such as in recent years, LED illumination is efficient with it, energy-conservation, environmental protection, and the life-span is long obtain extensive use.In different use occasions, also different to the requirement of the brightness of LED lamp.Although LED drive power realizes constant current output at present, shortcoming is that output current is fixed, cannot regulation output size of current.
Summary of the invention
The object of the present invention is to provide a kind of LED Drive and Control Circuit of switch dimming, the cost of its overall plan is low, and small volume is simple and practical, stable and reliable working performance, and the scope of application is comparatively extensive.
In order to achieve the above object, technical scheme of the present invention is:
A kind of LED Drive and Control Circuit of switch dimming, comprise bridge rectifier 200, LED Drive and Control Circuit 220, described bridge rectifier 200 respectively with high-voltage filtering capacitor 201, first resistance 202, LED drive circuit 221 is in parallel, wherein said first resistance 202 is connected with the second resistance 207, described second resistance 207 is by the 3rd resistance 210 ground connection, described second resistance 207 is connected with LED Drive and Control Circuit 220 with between the 3rd resistance 210, described LED Drive and Control Circuit 220 is connected with power tube 218 grid, described power tube 218 source electrode is by the 4th resistance 219 ground connection.
Described LED Drive and Control Circuit 220 comprises peak current detection circuit 217, electric current estimation circuit 216, logic control circuit 213, drive circuit 214, AC switch decision circuitry 215, time of afterflow testing circuit 211, and described power tube 218 source electrode is connected with described power tube 218 grid by peak current detection circuit 217, electric current estimation circuit 216, AC switch decision circuitry 215, logic control circuit 213, drive circuit 214 successively, described time of afterflow testing circuit 211 one end is connected between the second resistance 207 and the 3rd resistance 210, and described time of afterflow testing circuit 211 other end is connected with electric current estimation circuit 216, the voltage of described peak current detection circuit 217 detection power pipe 218 source electrode, and output signal to described electric current estimation circuit 216, described time of afterflow testing circuit 211 detects the voltage knee between described second resistance 207 and the 3rd resistance 210, and output signal to electric current estimation circuit 216, described logic control circuit 213 receives described electric current estimation circuit 216 and outputs signal, carry out computing and output signal is delivered to described drive circuit 214, control the turn-on and turn-off of described power tube 218, ensure constant output current, whether described AC switch decision circuitry 215 there is switch by the voltage analysis input AC electricity AC voltage of detection power pipe 218 source electrode.
Between described first resistance 202 and the second resistance 207, diode 205 is installed, between described diode 205 and the second resistance 207, auxiliary winding 208 is installed, described first resistance 202 is connected with electric capacity 209 one end, the rear ground connection and described electric capacity 209 other end is connected with auxiliary winding 208.
Described power tube 218 drains to be coupled with the different name end of fly-wheel diode 203 and energy storage inductor 206 respectively and is connected.
Described bridge rectifier 200 is in parallel with storage capacitor 204.
Described power tube 218 is field effect transistor.
The invention has the beneficial effects as follows: a kind of LED Drive and Control Circuit of switch dimming, due to inside integrated AC switch decision circuitry, what energy was intelligent judges whether export AC action occurs, thus on the basis not increasing system cost, realize the adjustment of output current amplitude, there is compared with other dimming power sources the circuit structure of simple LED driving power, less LED driving power volume, lower LED driving power cost, stable and reliable working performance, the scope of application is comparatively extensive, not only may be used for non-isolation type supply convertor, isolated supplies converter or other type of converter can also be applied to.
Accompanying drawing explanation
Fig. 1 is the schematic block circuit diagram of LED drive circuit of the present invention;
Fig. 2 is the logical signal figure of each point in LED Drive and Control Circuit practical work process of the present invention;
Fig. 3 is the logical signal figure of LED Drive and Control Circuit AC switch decision circuitry of the present invention.
Embodiment
Embodiment 1
A kind of LED Drive and Control Circuit of switch dimming as shown in Figure 1, comprise bridge rectifier 200, LED Drive and Control Circuit 220, described bridge rectifier 200 respectively with high-voltage filtering capacitor 201, first resistance 202, LED drive circuit 221 is in parallel, wherein said first resistance 202 is connected with the second resistance 207, described second resistance 207 is by the 3rd resistance 210 ground connection, described second resistance 207 is connected with LED Drive and Control Circuit 220 with between the 3rd resistance 210, described LED Drive and Control Circuit 220 is connected with power tube 218 grid, described power tube 218 source electrode is by the 4th resistance 219 ground connection.Described bridge rectifier 200 is in parallel with storage capacitor 204.
Described LED Drive and Control Circuit 220 comprises peak current detection circuit 217, electric current estimation circuit 216, logic control circuit 213, drive circuit 214, AC switch decision circuitry 215, time of afterflow testing circuit 211, and described power tube 218 source electrode is connected with described power tube 218 grid by peak current detection circuit 217, electric current estimation circuit 216, AC switch decision circuitry 215, logic control circuit 213, drive circuit 214 successively, described time of afterflow testing circuit 211 one end is connected between the second resistance 207 and the 3rd resistance 210, and described time of afterflow testing circuit 211 other end is connected with electric current estimation circuit 216, the voltage of described peak current detection circuit 217 detection power pipe 218 source electrode, and output signal to described electric current estimation circuit 216, described time of afterflow testing circuit 211 detects the voltage knee between described second resistance 207 and the 3rd resistance 210, and output signal to electric current estimation circuit 216, described logic control circuit 213 receives described electric current estimation circuit 216 and outputs signal, carry out computing and output signal is delivered to described drive circuit 214, control the turn-on and turn-off of described power tube 218, ensure constant output current, whether described AC switch decision circuitry 215 there is switch by the voltage analysis input AC electricity AC voltage of detection power pipe 218 source electrode.
Between described first resistance 202 and the second resistance 207, diode 205 is installed, between described diode 205 and the second resistance 207, auxiliary winding 208 is installed, described first resistance 202 is connected with electric capacity 209 one end, the rear ground connection and described electric capacity 209 other end is connected with auxiliary winding 208.
Described power tube 218 drains to be coupled with the different name end of fly-wheel diode 203 and energy storage inductor 206 respectively and is connected.
Described power tube 218 is field effect transistor.
The LED Drive and Control Circuit of a kind of switch dimming described in the present embodiment is when alternating current AC accesses, described first resistance 202 by Energy Transfer to electric capacity 209, described electric capacity 209 is responsible for powering to LED Drive and Control Circuit 221, when the level on electric capacity 209 reaches the start-up point of LED Drive and Control Circuit 220, LED Drive and Control Circuit 220 is started working, control power tube 218 open-minded, energy is by LED drive circuit 221 and be stored on energy storage inductor 206, peak current detection circuit 217 gathers the level on power tube 218 source electrode, logic control circuit 213 controls drive circuit 214 and turns off, energy on energy storage inductor 206 is transferred to LED drive circuit 221 by fly-wheel diode 203.When fly-wheel diode 203 conducting, the auxiliary winding 208 being coupling in energy storage inductor 206 is charged to electric capacity 209 by diode 205, and auxiliary winding 208 also arrives ground by the second resistance 207 and the 3rd resistance 210 simultaneously.Time of afterflow testing circuit 211 detects the common port of the second resistance 207 and the 3rd resistance 210, thus calculates the ON time of fly-wheel diode 203.After the signal that electric current estimation circuit 216 gathers peak detection circuit 217 and time of afterflow testing circuit 211 carries out computing, pass to logic control circuit 213, switch-off power pipe 218.
As Fig. 2, Fig. 3, it is shown when alternating current AC is closed, energy on high-voltage filtering capacitor 201 has been consumed rapidly, power tube 218 source voltage will be continuously low, the anode of the AC switch decision circuitry 215 be connected with CS pin is also continuously low, and AC switch decision circuitry 215 overturns, and outputs signal to electric current estimation circuit 216, when exceeding the spilling threshold value of electric current estimation circuit 216, then output signal to logic control circuit 213.Logic control circuit 213 judges that switch occurs alternating current AC, changes turning on and off of power tube 218, output current is changed by drive circuit 214, thus changes the brightness of LED drive circuit 221.
Have employed LED Drive and Control Circuit and the driving circuit structure thereof of this invention, due to inside integrated AC switch decision circuitry, what energy was intelligent judges whether export AC action occurs, thus on the basis not increasing system cost, realize the adjustment of output current amplitude, thus simplify the circuit structure of LED driving power, reduce LED driving power volume, reduce LED driving power cost, stable and reliable working performance, the scope of application is comparatively extensive, not only may be used for isolated supplies converter, non-isolation type supply convertor or other type of converter can also be applied to.
Claims (6)
1. the LED Drive and Control Circuit of a switch dimming, it is characterized in that: comprise bridge rectifier 200, LED Drive and Control Circuit 220, described bridge rectifier 200 respectively with high-voltage filtering capacitor 201, first resistance 202, LED drive circuit 221 is in parallel, wherein said first resistance 202 is connected with the second resistance 207, described second resistance 207 is by the 3rd resistance 210 ground connection, described second resistance 207 is connected with LED Drive and Control Circuit 220 with between the 3rd resistance 210, described LED Drive and Control Circuit 220 is connected with power tube 218 grid, described power tube 218 source electrode is by the 4th resistance 219 ground connection.
2. the LED Drive and Control Circuit of a kind of switch dimming according to claim 1, it is characterized in that: described LED Drive and Control Circuit 220 comprises peak current detection circuit 217, electric current estimation circuit 216, logic control circuit 213, drive circuit 214, AC switch decision circuitry 215, time of afterflow testing circuit 211, described power tube 218 source electrode is connected with described power tube 218 grid by peak current detection circuit 217, electric current estimation circuit 216, AC switch decision circuitry 215, logic control circuit 213, drive circuit 214 successively, described time of afterflow testing circuit 211 one end is connected between the second resistance 207 and the 3rd resistance 210, and described time of afterflow testing circuit 211 other end is connected with electric current estimation circuit 216, the voltage of described peak current detection circuit 217 detection power pipe 218 source electrode, and output signal to described electric current estimation circuit 216, described time of afterflow testing circuit 211 detects the voltage knee between described second resistance 207 and the 3rd resistance 210, and output signal to electric current estimation circuit 216, described logic control circuit 213 receives described electric current estimation circuit 216 and outputs signal, carry out computing and output signal is delivered to described drive circuit 214, control the turn-on and turn-off of described power tube 218, ensure constant output current, whether described AC switch decision circuitry 215 there is switch by the voltage analysis input AC electricity AC voltage of detection power pipe 218 source electrode.
3. the LED Drive and Control Circuit of a kind of switch dimming according to claim 1, it is characterized in that: between described first resistance 202 and the second resistance 207, diode 205 is installed, between described diode 205 and the second resistance 207, auxiliary winding 208 is installed, described first resistance 202 is connected with electric capacity 209 one end, the rear ground connection and described electric capacity 209 other end is connected with auxiliary winding 208.
4. the LED Drive and Control Circuit of a kind of switch dimming according to claim 1, is characterized in that: described power tube 218 drains to be coupled with the different name end of fly-wheel diode 203 and energy storage inductor 206 respectively and is connected.
5. the LED Drive and Control Circuit of a kind of switch dimming according to claim 1, is characterized in that: described bridge rectifier 200 is in parallel with storage capacitor 204.
6. the LED Drive and Control Circuit of a kind of switch dimming according to claim 1, is characterized in that: described power tube 218 is field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092672.4A CN104768282B (en) | 2015-03-02 | 2015-03-02 | A kind of LED drive control circuits of switch dimming |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510092672.4A CN104768282B (en) | 2015-03-02 | 2015-03-02 | A kind of LED drive control circuits of switch dimming |
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| Publication Number | Publication Date |
|---|---|
| CN104768282A true CN104768282A (en) | 2015-07-08 |
| CN104768282B CN104768282B (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510092672.4A Expired - Fee Related CN104768282B (en) | 2015-03-02 | 2015-03-02 | A kind of LED drive control circuits of switch dimming |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768283A (en) * | 2015-03-02 | 2015-07-08 | 绍兴光大芯业微电子有限公司 | Intelligent LED drive control circuit |
| CN106061074A (en) * | 2016-08-04 | 2016-10-26 | 惠州市惠阳区永湖中学 | Acousto-optic induction lamp |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100482015C (en) * | 2005-09-16 | 2009-04-22 | Nec照明株式会社 | Low-voltage power supply circuit for illumination, and low-voltage power supply output method and illumination device |
| EP2445315A1 (en) * | 2010-10-25 | 2012-04-25 | Panasonic Corporation | Dimming device and lighting apparatus using same |
| CN103052240A (en) * | 2013-01-16 | 2013-04-17 | 绍兴光大芯业微电子有限公司 | High-power factor light-emitting diode driving circuit structure |
| CN103152951A (en) * | 2013-03-13 | 2013-06-12 | 绍兴光大芯业微电子有限公司 | LED (light emitting diode) driving control circuit and driving circuit structure of LED driving control circuit |
| CN104768283A (en) * | 2015-03-02 | 2015-07-08 | 绍兴光大芯业微电子有限公司 | Intelligent LED drive control circuit |
-
2015
- 2015-03-02 CN CN201510092672.4A patent/CN104768282B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100482015C (en) * | 2005-09-16 | 2009-04-22 | Nec照明株式会社 | Low-voltage power supply circuit for illumination, and low-voltage power supply output method and illumination device |
| EP2445315A1 (en) * | 2010-10-25 | 2012-04-25 | Panasonic Corporation | Dimming device and lighting apparatus using same |
| CN103052240A (en) * | 2013-01-16 | 2013-04-17 | 绍兴光大芯业微电子有限公司 | High-power factor light-emitting diode driving circuit structure |
| CN103152951A (en) * | 2013-03-13 | 2013-06-12 | 绍兴光大芯业微电子有限公司 | LED (light emitting diode) driving control circuit and driving circuit structure of LED driving control circuit |
| CN104768283A (en) * | 2015-03-02 | 2015-07-08 | 绍兴光大芯业微电子有限公司 | Intelligent LED drive control circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768283A (en) * | 2015-03-02 | 2015-07-08 | 绍兴光大芯业微电子有限公司 | Intelligent LED drive control circuit |
| CN106061074A (en) * | 2016-08-04 | 2016-10-26 | 惠州市惠阳区永湖中学 | Acousto-optic induction lamp |
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| Publication number | Publication date |
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| CN104768282B (en) | 2017-05-31 |
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Effective date of registration: 20191225 Address after: No. 35-4, Puzhou Road, Yanjiang street, Jiangbei new district, Nanjing City, Jiangsu Province Patentee after: Nanjing dianrun Electric Co.,Ltd. Address before: 312000 Zhejiang Province, Shaoxing City Tianmu Road No. 13 Patentee before: SHAOXING DEVECHIP MICROELECTRONICS Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170531 |