CN104768282B - A kind of LED drive control circuits of switch dimming - Google Patents
A kind of LED drive control circuits of switch dimming Download PDFInfo
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- CN104768282B CN104768282B CN201510092672.4A CN201510092672A CN104768282B CN 104768282 B CN104768282 B CN 104768282B CN 201510092672 A CN201510092672 A CN 201510092672A CN 104768282 B CN104768282 B CN 104768282B
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Abstract
The invention discloses a kind of LED drive control circuits of switch dimming, including bridge rectifier, LED drive control circuits, the bridge rectifier is in parallel with high-voltage filtering capacitor, first resistor, LED drive circuit respectively, wherein described first resistor is connected with second resistance, the second resistance is grounded by 3rd resistor, it is connected with LED drive control circuits between the second resistance and 3rd resistor, the LED drive controls circuit is connected with power tube grid, and the power tube source electrode passes through the 4th resistance eutral grounding.A kind of LED drive control circuits of switch dimming of the present invention, the low cost of its overall plan, small volume is simple and practical, and stable and reliable working performance, the scope of application is relatively broad.
Description
Technical field
The present invention is to be related to intelligent LED light adjusting circuits, specifically refers to a kind of detection urban electric power switch so as to realize difference
The LED drive controls circuit and its driving circuit structure of output current.
Background technology
In recent years, LED illumination is efficient with it, energy-conservation, environmental protection, and the advantage such as long lifespan obtains extensive use.Make in different
With in occasion, the requirement to the brightness of LED lamp is also different.Although current LED drive power has been carried out constant current output,
But a disadvantage is that output current is fixed, it is impossible to adjust output current size.
The content of the invention
It is an object of the invention to provide a kind of LED drive control circuits of switch dimming, the low cost of its overall plan,
Small volume, simple and practical, stable and reliable working performance, the scope of application is relatively broad.
In order to achieve the above object, the technical scheme is that：
A kind of LED drive control circuits of switch dimming, including bridge rectifier 200, LED drive controls circuit 220,
The bridge rectifier 200 is in parallel with high-voltage filtering capacitor 201, first resistor 202, LED drive circuit 221 respectively, wherein
The first resistor 202 is connected with second resistance 207, and the second resistance 207 is grounded by 3rd resistor 210, and described second
It is connected with LED drive controls circuit 220 between resistance 207 and 3rd resistor 210, the LED drive controls circuit 220 and power
The grid of pipe 218 is connected, and the source electrode of the power tube 218 is grounded by the 4th resistance 219.
The LED drive controls circuit 220 includes peak current detection circuit 217, electric current estimation circuit 216, logic control
Circuit processed 213, drive circuit 214, AC switch decision circuitry 215, time of afterflow detection circuit 211, the source electrode of the power tube 218
Pass sequentially through peak current detection circuit 217, electric current estimation circuit 216, logic control circuit 213, drive circuit 214 with it is described
The grid of power tube 218 is connected, while the source electrode of power tube 218 also passes sequentially through AC switch decision circuitries 215, logic control circuit
213rd, drive circuit 214 is connected with the grid of the power tube 218；Described time of afterflow detection circuit 211 one end is connected to second
Between resistance 207 and 3rd resistor 210, the time of afterflow detection other end of circuit 211 is connected with electric current estimation circuit 216；
The peak current detection circuit 217 detects the voltage of the source electrode of power tube 218, and outputs signal to the electric current estimation circuit
216, the time of afterflow detection circuit 211 detects the voltage knee between the second resistance 207 and 3rd resistor 210, and
Electric current estimation circuit 216 is outputed signal to, the logic control circuit 213 receives the output signal of electric current estimation circuit 216,
Carry out calculating treatment and output signal delivered into described drive circuit 214, control the turn-on and turn-off of the power tube 218,
Ensure constant output current, the AC switchs decision circuitry 215 by detecting the voltage analysis input AC of the source electrode of power tube 218
Whether electric AC voltages switch.
Diode 205, the electricity of the diode 205 and second are installed between the first resistor 202 and second resistance 207
Assists winding 208 is installed between resistance 207, the first resistor 202 is connected with the one end of electric capacity 209, and the electric capacity 209 is another
End is grounded after being connected with assists winding 208.
The 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.
The bridge rectifier 200 is in parallel with storage capacitor 204.
The power tube 218 is FET.
The beneficial effects of the invention are as follows：A kind of LED drive control circuits of switch dimming, sentence due to being internally integrated AC switches
Deenergizing, can intelligence judge output AC whether act, so as on the basis of system cost is not increased realize output electricity
The regulation of amplitude is flowed, compared with the circuit structure that other dimming power sources have simple LED drive power, less LED drive power
Volume, relatively low LED drive power cost, stable and reliable working performance, the scope of application is relatively broad, can be not only used for it is non-every
Release supply convertor, can also be applied to isolated supplies converter or other type of converter.
Brief description of the drawings
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 controls circuit practical work process of the present invention；
Fig. 3 is the logical signal figure that LED drive controls circuit AC of the present invention switchs decision circuitry.
Specific embodiment
Embodiment 1
A kind of LED drive control circuits of switch dimming as shown in Figure 1, including bridge rectifier 200, LED drives control
Circuit processed 220, the bridge rectifier 200 respectively with high-voltage filtering capacitor 201, first resistor 202, LED drive circuit 221
Parallel connection, wherein the first resistor 202 is connected with second resistance 207, the second resistance 207 is grounded by 3rd resistor 210,
It is connected with LED drive controls circuit 220 between the second resistance 207 and 3rd resistor 210, the LED drive controls circuit
220 are connected with the grid of power tube 218, and the source electrode of the power tube 218 is grounded by the 4th resistance 219.The bridge rectifier
200 is in parallel with storage capacitor 204.
The LED drive controls circuit 220 includes peak current detection circuit 217, electric current estimation circuit 216, logic control
Circuit processed 213, drive circuit 214, AC switch decision circuitry 215, time of afterflow detection circuit 211, the source electrode of the power tube 218
Pass sequentially through peak current detection circuit 217, electric current estimation circuit 216, logic control circuit 213, drive circuit 214 with it is described
The grid of power tube 218 is connected, while the source electrode of power tube 218 also passes sequentially through AC switch decision circuitries 215, logic control circuit
213rd, drive circuit 214 is connected with the grid of the power tube 218；Described time of afterflow detection circuit 211 one end is connected to second
Between resistance 207 and 3rd resistor 210, the time of afterflow detection other end of circuit 211 is connected with electric current estimation circuit 216；
The peak current detection circuit 217 detects the voltage of the source electrode of power tube 218, and outputs signal to the electric current estimation circuit
216, the time of afterflow detection circuit 211 detects the voltage knee between the second resistance 207 and 3rd resistor 210, and
Electric current estimation circuit 216 is outputed signal to, the logic control circuit 213 receives the output signal of electric current estimation circuit 216,
Carry out calculating treatment and output signal delivered into described drive circuit 214, control the turn-on and turn-off of the power tube 218,
Ensure constant output current, the AC switchs decision circuitry 215 by detecting the voltage analysis input AC of the source electrode of power tube 218
Whether electric AC voltages switch.
Diode 205, the electricity of the diode 205 and second are installed between the first resistor 202 and second resistance 207
Assists winding 208 is installed between resistance 207, the first resistor 202 is connected with the one end of electric capacity 209, and the electric capacity 209 is another
End is grounded after being connected with assists winding 208.
The 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.
The power tube 218 is FET.
A kind of LED drive controls circuit of the switch dimming described in the present embodiment when alternating current AC is accessed, described first
Resistance 202 transmits energy to electric capacity 209, and the electric capacity 209 is responsible for being powered to LED drive controls circuit 221, when electric capacity 209
On level when reaching the startup point of LED drive controls circuit 220, LED drive controls circuit 220 is started working, and controls power
Pipe 218 is open-minded, and energy is by LED drive circuit 221 and is stored on energy storage inductor 206, and peak current detection circuit 217 is gathered
Level on the source electrode of power tube 218, the control drive circuit 214 of logic control circuit 213 is turned off, the energy on energy storage inductor 206
LED drive circuit 221 is transferred to by fly-wheel diode 203.When fly-wheel diode 203 is turned on, energy storage inductor 206 is coupling in
Assists winding 208 charged to electric capacity 209 by diode 205, while assists winding 208 is also by second resistance 207 and the
Three resistance 210 arrive ground.The common port of time of afterflow detection circuit 211 detection second resistance 207 and 3rd resistor 210, so as to count
Calculate the ON time of fly-wheel diode 203.Electric current estimation circuit 216 gathers peak detection circuit 217 and time of afterflow detection
After the signal of circuit 211 carries out computing, logic control circuit 213, switch-off power pipe 218 are passed to.
Such as Fig. 2, Fig. 3, shown when alternating current AC is closed, the energy on high-voltage filtering capacitor 201 is depleted rapidly,
The anode that the source voltage of power tube 218 will be continuously low, to be connected with CS pin AC switch decision circuitries 215 is also continuously low, AC
Switch decision circuitry 215 overturns, and electric current estimation circuit 216 is outputed signal to, when the spilling threshold more than electric current estimation circuit 216
Value, then output signal to logic control circuit 213.Logic control circuit 213 judges that alternating current AC is switched, by driving electricity
Road 214 changes turning on and off for power tube 218, output current is changed, so as to change the bright of LED drive circuit 221
Degree.
The LED drive controls circuit and its driving circuit structure of the invention are employed, is judged due to being internally integrated AC switches
Circuit, can intelligence judge whether output AC acts, so as to realizing output current on the basis of system cost is not increased
The regulation of amplitude, so as to simplify the circuit structure of LED drive power, reduces LED drive power volume, reduces LED and drives
Power supply cost, stable and reliable working performance, the scope of application is relatively broad, can be not only used for isolated supplies converter, may be used also
To be applied to non-isolation type supply convertor or other type of converter.
Claims (5)
1. LED drive control circuits of a kind of switch dimming, it is characterised in that：Driven including bridge rectifier 200, LED and controlled
Circuit processed 220, the bridge rectifier 200 respectively with high-voltage filtering capacitor 201, first resistor 202, LED drive circuit 221
Parallel connection, wherein the first resistor 202 is connected with second resistance 207, the second resistance 207 is grounded by 3rd resistor 210,
It is connected with LED drive controls circuit 220 between the second resistance 207 and 3rd resistor 210, the LED drive controls circuit
220 are connected with the grid of power tube 218, and the source electrode of the power tube 218 is grounded by the 4th resistance 219；The LED drive controls electricity
Road 220 includes that peak current detection circuit 217, electric current estimation circuit 216, logic control circuit 213, drive circuit 214, AC are opened
Decision circuitry 215, time of afterflow detection circuit 211 is closed, the source electrode of the power tube 218 passes sequentially through peak current detection circuit
217th, electric current estimation circuit 216, logic control circuit 213, drive circuit 214 are connected with the grid of the power tube 218, while work(
The source electrode of rate pipe 218 also passes sequentially through AC switches decision circuitry 215, logic control circuit 213, drive circuit 214 and the power
The grid of pipe 218 is connected；Described time of afterflow detection circuit 211 one end is connected between second resistance 207 and 3rd resistor 210,
The time of afterflow detection other end of circuit 211 is connected with electric current estimation circuit 216；The peak current detection circuit 217 is examined
The voltage of the source electrode of power scale pipe 218, and the electric current estimation circuit 216 is outputed signal to, the time of afterflow detects circuit 211
The voltage knee between the second resistance 207 and 3rd resistor 210 is detected, and outputs signal to electric current estimation circuit 216, institute
State logic control circuit 213 and receive the output signal of electric current estimation circuit 216, calculate treatment and deliver to output signal
Described drive circuit 214, controls the turn-on and turn-off of the power tube 218, it is ensured that constant output current, and the AC switches are sentenced
Deenergizing 215 is by detecting whether the voltage analysis input AC electricity AC voltages of the source electrode of power tube 218 switch.
2. LED drive control circuits of a kind of switch dimming according to claim 1, it is characterised in that：First electricity
Diode 205 is installed between resistance 202 and second resistance 207, is provided between the diode 205 and second resistance 207 auxiliary
Winding 208 is helped, the first resistor 202 is connected with the one end of electric capacity 209, and the other end of the electric capacity 209 and the phase of assists winding 208
It is grounded after even.
3. LED drive control circuits of a kind of switch dimming according to claim 1, it is characterised in that：The power tube
218 drain electrodes are coupled with the different name end of fly-wheel diode 203 and energy storage inductor 206 are connected respectively.
4. LED drive control circuits of a kind of switch dimming according to claim 1, it is characterised in that：The bridge-type is whole
Current circuit 200 is in parallel with storage capacitor 204.
5. LED drive control circuits of a kind of switch dimming according to claim 1, it is characterised in that：The power tube
218 is FET.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104768282A CN104768282A (en) | 2015-07-08 |
| CN104768282B true CN104768282B (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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Families Citing this family (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 |
| CN106061074B (en) * | 2016-08-04 | 2019-02-26 | 惠州市惠阳区永湖中学 | A kind of acousto-optic sense light |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007080771A (en) * | 2005-09-16 | 2007-03-29 | Nec Lighting Ltd | Low voltage power supply circuit for lighting, lighting device, and low voltage power supply output method for lighting |
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2015
- 2015-03-02 CN CN201510092672.4A patent/CN104768282B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN104768282A (en) | 2015-07-08 |
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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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Granted publication date: 20170531 |
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