CN204948411U - A kind of anti-flicker LED alternating-current drive circuit - Google Patents
A kind of anti-flicker LED alternating-current drive circuit Download PDFInfo
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- CN204948411U CN204948411U CN201520550033.3U CN201520550033U CN204948411U CN 204948411 U CN204948411 U CN 204948411U CN 201520550033 U CN201520550033 U CN 201520550033U CN 204948411 U CN204948411 U CN 204948411U
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Abstract
The utility model discloses a kind of anti-flicker LED alternating-current drive circuit, it comprises AC power, driver module and LED module, ac power output is connected with rectifier bridge input wire, rectifier bridge first output is connected with energy-storage module, driver module and LED module input wire, driver module output is connected with LED module input wire, and another output of described rectifier bridge is connected with the earth terminal of energy-storage module, driver module and LED module and ground connection; The LED alternating-current drive circuit driving LED when input voltage is greater than certain value solving prior art normally works.But when input voltage will there will be the situation of LED Close All lower than when certain value, and this phenomenon periodically occurs, embodies intrinsic stroboscopic phenomenon, seriously reduces the technical problems such as the useful life of LED.
Description
Technical field
The utility model belongs to electronic circuit technology, particularly relates to a kind of anti-flicker LED alternating-current drive circuit.
Background technology
The LED being called as " green illumination " plays more and more important role at lighting field, also more and more deep to the research of LED drive circuit.It has been generally acknowledged that LED is a kind of device of DC powered, single tube LED generally just can normally work under the voltage of several volts.But LED DC driven often additionally needs a low-voltage dc power supply, and power factor (PF) is lower.When relating to cost control and electrical network and having a higher-wattage factors dictate to equipment, LED DC driven is limited.AC LED driver circuit is widely used because having structure simple cost low power factor advantages of higher.The LED alternating-current drive circuit of prior art is directly by ac power supply, and when input voltage is greater than certain value, driving LED normally works.But when input voltage will there will be the situation of LED Close All lower than when certain value, and this phenomenon periodically occurs, embodies intrinsic stroboscopic phenomenon, seriously reduces the useful life of LED.
Utility model content
The technical problems to be solved in the utility model: provide a kind of anti-flicker LED alternating-current drive circuit, normally works with the LED alternating-current drive circuit driving LED when input voltage is greater than certain value solving prior art.But when input voltage will there will be the situation of LED Close All lower than when certain value, and this phenomenon periodically occurs, embodies intrinsic stroboscopic phenomenon, seriously reduces the technical problems such as the useful life of LED.
Technical solutions of the utility model:
A kind of anti-flicker LED alternating-current drive circuit, it comprises AC power, driver module and LED module, ac power output is connected with rectifier bridge input wire, rectifier bridge first output is connected with energy-storage module, driver module and LED module input wire, driver module output is connected with LED module input wire, and another output of described rectifier bridge is connected with the earth terminal of energy-storage module, driver module and LED module and ground connection.
Described rectifier bridge comprises the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, AC power one end connects the negative electrode of the first diode D1 and the anode of the second diode D2, the other end of AC power connects the negative electrode of the 3rd diode D3 and the anode of the 4th diode D4, the negative electrode of the second diode D2 connects the negative electrode of the 4th diode D4, and the anode of the first diode D1 connects the anode of the 3rd diode D3 and connects ground.
Described energy-storage module comprises the 5th diode D5, Zener diode Z, resistance R, electric capacity C, the anode of the 5th diode D5 connects the negative electrode of the second diode D2 and the negative electrode of the 4th diode D4 in rectifier bridge, the negative electrode of the 5th diode D5 connects the anode of Zener diode Z, the negative electrode contact resistance R of Zener diode Z, the other end of resistance R connects electric capacity C, and the electric capacity other end is connected to ground.
The beneficial effects of the utility model:
The utility model adopts energy-storage module, when the full-wave rectified voltage inputted is higher, described 5th diode D5 and described Zener diode Z forward conduction, while powering on the one hand described driver module and LED module, charge to described electric capacity C by described Zener diode Z and described resistance R.Described resistance R, for limiting the charging current of described electric capacity C, prevents electric current excessive.Described in when the full-wave rectified voltage inputted is lower, the anode voltage of the 5th diode D5 and described Zener diode Z all declines, because the voltage transient on described electric capacity C is constant, reverse breakdown conducting is also powered for driver module Driver and LED module by described Zener diode Z, described 5th diode D5 is greater than anode voltage and reverse-biased because of cathode voltage, above process is repeated when described full-wave rectified voltage rises to high value again, solve the intrinsic stroboscopic problem that LED alternating-current drive circuit causes due to instantaneous low input, increase the LED operating time, and circuit structure is simple, the LED alternating-current drive circuit driving LED when input voltage is greater than certain value solving prior art normally works.But when input voltage will there will be the situation of LED Close All lower than when certain value, and this phenomenon periodically occurs, embodies intrinsic stroboscopic phenomenon, seriously reduces the technical problems such as the useful life of LED.
Accompanying drawing explanation
Fig. 1 is the utility model theory structure schematic block diagram;
Fig. 2 is the structural representation of AC power and rectifier bridge;
Fig. 3 is the structural representation of energy-storage module;
Fig. 4 is the concrete structure schematic diagram of the utility model circuit.
Embodiment
A kind of anti-flicker LED alternating-current drive circuit (see figure 1), it comprises AC power, driver module and LED module, ac power output is connected with rectifier bridge input wire, rectifier bridge first output is connected with energy-storage module, driver module and LED module input wire, driver module output is connected with LED module input wire, and another output of described rectifier bridge is connected with the earth terminal of energy-storage module, driver module and LED module and ground connection.
In Fig. 1, AC represents AC power, and Driver represents driver module, and LEDS represents LED module.
Described rectifier bridge (see figure 2) comprises the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, AC power one end connects the negative electrode of the first diode D1 and the anode of the second diode D2, the other end of AC power connects the negative electrode of the 3rd diode D3 and the anode of the 4th diode D4, the negative electrode of the second diode D2 connects the negative electrode of the 4th diode D4, and the anode of the first diode D1 connects the anode of the 3rd diode D3 and connects ground.When described AC power has voltage to input, the negative electrode of described second diode D2 and described 4th diode D4 will export full-wave rectified voltage, and use as the supply power voltage of subordinate.
Described energy-storage module (see figure 3) comprises the 5th diode D5, Zener diode Z, resistance R, electric capacity C, the anode of the 5th diode D5 connects the negative electrode of the second diode D2 and the negative electrode of the 4th diode D4 in rectifier bridge, the negative electrode of the 5th diode D5 connects the anode of Zener diode Z, the negative electrode contact resistance R of Zener diode Z, the other end of resistance R connects electric capacity C, and the electric capacity other end is connected to ground.
The circuit structure of the utility model entirety as shown in Figure 4, when the full-wave rectified voltage inputted is higher, described 5th diode D5 and described Zener diode Z forward conduction, while powering on the one hand described driver module Driver and LED module, charge to described electric capacity C by described Zener diode Z and described resistance R.Described resistance R, for limiting the charging current of described electric capacity C, prevents electric current excessive.Described in when the full-wave rectified voltage inputted is lower, the anode voltage of the 5th diode D5 and described Zener diode Z all declines, because the voltage transient on described electric capacity C is constant, reverse breakdown conducting is also powered for driver module Driver and LED module by described Zener diode Z.Described 5th diode D5 is greater than anode voltage and reverse-biased because of cathode voltage.Repeat above process when described full-wave rectified voltage rises to high value again, thus be LED module stable output voltage, avoid LED occur scintillation and reduce the useful life of LED.
Claims (2)
1. an anti-flicker LED alternating-current drive circuit, it comprises AC power, driver module and LED module, it is characterized in that: ac power output is connected with rectifier bridge input wire, rectifier bridge first output is connected with energy-storage module, driver module and LED module input wire, driver module output is connected with LED module input wire, and another output of described rectifier bridge is connected with the earth terminal of energy-storage module, driver module and LED module and ground connection; Described energy-storage module comprises the 5th diode D5, Zener diode Z, resistance R, electric capacity C, the anode of the 5th diode D5 connects the negative electrode of the second diode D2 and the negative electrode of the 4th diode D4 in rectifier bridge, the negative electrode of the 5th diode D5 connects the anode of Zener diode Z, the negative electrode contact resistance R of Zener diode Z, the other end of resistance R connects electric capacity C, and the electric capacity other end is connected to ground.
2. one according to claim 1 anti-flicker LED alternating-current drive circuit, it is characterized in that: described rectifier bridge comprises the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, AC power one end connects the negative electrode of the first diode D1 and the anode of the second diode D2, the other end of AC power connects the negative electrode of the 3rd diode D3 and the anode of the 4th diode D4, the negative electrode of the second diode D2 connects the negative electrode of the 4th diode D4, and the anode of the first diode D1 connects the anode of the 3rd diode D3 and connects ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520550033.3U CN204948411U (en) | 2015-07-28 | 2015-07-28 | A kind of anti-flicker LED alternating-current drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520550033.3U CN204948411U (en) | 2015-07-28 | 2015-07-28 | A kind of anti-flicker LED alternating-current drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204948411U true CN204948411U (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520550033.3U Expired - Fee Related CN204948411U (en) | 2015-07-28 | 2015-07-28 | A kind of anti-flicker LED alternating-current drive circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204948411U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955249A (en) * | 2015-07-28 | 2015-09-30 | 李泽宏 | Anti-flash LED AC driving circuit |
| CN110519881A (en) * | 2019-07-16 | 2019-11-29 | 深圳市稳先微电子有限公司 | LED driving circuit and control method thereof |
-
2015
- 2015-07-28 CN CN201520550033.3U patent/CN204948411U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104955249A (en) * | 2015-07-28 | 2015-09-30 | 李泽宏 | Anti-flash LED AC driving circuit |
| CN110519881A (en) * | 2019-07-16 | 2019-11-29 | 深圳市稳先微电子有限公司 | LED driving circuit and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191211 Address after: 550025 standard factory building, Jinyang science and Technology Industrial Park, Guiyang National High tech Industrial Development Zone, Guiyang City, Guizhou Province Patentee after: GUIZHOU E-CHIP MICROELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 550025, No. 12, Tuyun Road, Jinyang hi tech Development Zone, Guiyang hi tech Development Zone, Guizhou Patentee before: Li Zehong |
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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: 20160106 |